reducer decomposition reactor chamber

专利摘要:
Decomposition reactor for an exhaust system that includes an external component that defines an internal volume and has an inlet and an outlet, with the inlet and outlet being formed on the same side of the external component. A flow divider is positioned inside the internal volume and defines a thermal management chamber and a main flow chamber. A first exhaust gas flow path flows from the inlet to the main flow chamber to mix with the metered reducer, and a second exhaust gas flow path flows from the inlet to the thermal management chamber to control a temperature of one flow divider portion. In some implementations, one or more swirl diverters can be coupled to the flow divider and positioned adjacent to the outlet of the external component to impart a vorticating movement to a combined flow of reducer and exhaust gas exiting the outlet.
公开号:BR112020003307A2
申请号:R112020003307-3
申请日:2018-04-10
公开日:2020-08-25
发明作者:Ryan M. Johnson；Udit Bhaveshkumar Shah；Samuel Johnson；Mahendra Mittapalli；Kartiki Jagtap
申请人:Cummins Emission Solutions Inc.；
IPC主号:

专利说明:

[001] [001] This application claims priority over US patent application No. 15 / 683,315, filed on August 22, 2017, which is hereby incorporated by reference in its entirety and for multiple purposes. TECHNICAL FIELD
[002] [002] The present application relates in general to the field of exhaust gas treatment systems for internal combustion engines. BACKGROUND OF THE INVENTION
[003] [003] In internal combustion engines, such as diesel engines, nitrogen oxide (NOx) compounds can be emitted in the exhaust. To reduce NOx emissions, a selective catalytic reduction (RCS) process can be implemented to convert NOx compounds into more neutral compounds, such as diatomic nitrogen, water or carbon dioxide, with the aid of a catalyst and a reducer. The catalyst may be included in an exhaust system catalyst chamber, such as that of a vehicle or power generation unit. A reducer, such as anhydrous ammonia or urea, is typically introduced into the exhaust gas stream before the catalyst chamber. To introduce the reducer into the exhaust gas flow for the RCS process, an RCS system can dose or otherwise introduce the reducer through a metering module that vaporizes or sprays the reducer into an exhaust pipe of the exhaust system. exhaust upstream of the catalyst chamber. The RCS system can include one or more sensors to monitor conditions in the exhaust system. SUMMARY
[004] [004] The implementations described here refer to decomposition reactors, such as U-shaped or V-shaped decomposition reactors with an input and an output on the same side.
[005] [005] An implementation refers to a decomposition reactor for an exhaust system that includes an external component and a flow divider. The external component defines an internal volume and has an input and an output. The input and output are formed on the same side of the external component. The flow divider is positioned within the internal volume defined by the external component and is coupled to the external component. The flow divider defines a thermal management chamber and a main flow chamber within the internal volume. The main flow chamber is in fluid communication with the inlet and outlet, and the thermal management chamber is in fluid communication with the inlet and a downstream portion of the main flow chamber adjacent to the outlet. The flow divider includes an opening through which a metering gear unit is metered into the main flow chamber. A first exhaust flow path flows from the inlet into the main flow chamber to mix with the metered reducer through the opening in the flow divider and out of the outlet. A second exhaust flow path flows from the inlet to the thermal management chamber to control a temperature of a portion of the flow divider and out through one or more openings formed in the flow divider in the main flow chamber.
[006] [006] In some implementations, the decomposition reactor includes a mixer positioned inside the main flow chamber. In some implementations, the decomposition reactor includes one or more flow guide deflectors positioned in the thermal management chamber between the flow divider and the external component. The one or more flow guide deflectors can extend at least 50% of a length of an external wall of the external component. The one or more flow guide deflectors can be spaced evenly within the thermal management chamber to provide substantially uniform amounts of mass exhaust gas flow. The one or more flow guide deflectors can be configured to concentrate the flow of exhaust gases in a region of the flow divider. The concentration of the exhaust gas flow in the flow divider region may include reducing a cross-sectional area for the exhaust gas flowing through a portion of the thermal management chamber adjacent to the region. The one or more flow guide deflectors can be flat plates. In some implementations, the one or more openings comprise perforated cones. In some implementations, the decomposition reactor may additionally include one or more blades that extend through at least a portion of the inlet and are configured to redirect the flow of exhaust gas from a first direction from the inlet to a second direction different.
[007] [007] Another implementation refers to a decomposition reactor for an exhaust system that includes an external component, a flow divider and one or more swirl diverters. The external component defines an internal volume and has an input and an output. The input and output are formed on the same side of the external component. The flow divider is positioned within the internal volume defined by the external component and is coupled to the external component. The flow divider defines a thermal management chamber and a main flow chamber within the internal volume. The main flow chamber is in fluid communication with the inlet and outlet, and the thermal management chamber is in fluid communication with the inlet and a downstream portion of the main flow chamber adjacent to the outlet. The flow divider includes an opening through which a metering gear unit is metered into the main flow chamber. The one or more swirl diverters are coupled to the flow divider and positioned adjacent to the outlet of the external component. A first exhaust flow path flows from the inlet into the main flow chamber to mix with the metered reducer through the opening in the flow divider and out of the outlet. A second exhaust flow path flows from the inlet to the thermal management chamber to control a temperature of a portion of the flow divider and out through one or more openings formed in the flow divider in the main flow chamber.
[008] [008] In some implementations, the decomposition reactor includes a mixer positioned inside the main flow chamber. In some implementations, the decomposition reactor includes one or more flow guide deflectors positioned in the thermal management chamber between the flow divider and the external component. The one or more flow guide deflectors can extend at least 50% of a length of an external wall of the external component. The one or more flow guide deflectors can be spaced evenly within the thermal management chamber to provide substantially uniform amounts of mass exhaust gas flow. The one or more flow guide deflectors can be configured to concentrate the flow of exhaust gases in a region of the flow divider. The concentration of the exhaust gas flow in the flow divider region may include reducing a cross-sectional area for the exhaust gas flowing through a portion of the thermal management chamber adjacent to the region. The one or more flow guide deflectors can be flat plates. In some implementations, the main flow chamber includes a partition that divides the main flow chamber into a first chamber and a second chamber, the first chamber receiving the first exhaust gas flow path and the second chamber receiving a third exhaust gas flow path. The first exhaust gas flow path of the first chamber and the third exhaust gas flow path of the second chamber may combine in the downstream portion of the main flow chamber and upstream of the one or more swirl diverters.
[009] [009] Yet another implementation concerns a decomposition reactor for an exhaust system that includes an external component, mixer, a flow divider, a mixer and one or more flow guide deflectors. The external component defines an internal volume and has an input and an output. The input and output are formed on the same side of the external component. The flow divider is positioned within the internal volume defined by the external component and is coupled to the external component. The flow divider defines a thermal management chamber and a main flow chamber within the internal volume. The main flow chamber is in fluid communication with the inlet and outlet, and the thermal management chamber is in fluid communication with the inlet and a downstream portion of the main flow chamber adjacent to the outlet. The flow divider includes an opening through which a metering gear unit is metered into the main flow chamber. The mixer is positioned inside the main flow chamber. The one or more flow guide deflectors are positioned in the thermal management chamber between the flow divider and the external component. A first exhaust flow path flows from the inlet into the main flow chamber to mix with the metered reducer through the opening in the flow divider and out of the outlet. A second exhaust flow path flows from the inlet to the thermal management chamber to control a temperature of a portion of the flow divider and out through one or more openings formed in the flow divider in the main flow chamber.
[010] [010] In some implementations, the one or more flow guide deflectors can extend at least 50% of a length of an external wall of the external component. The one or more flow guide deflectors can be spaced evenly within the thermal management chamber to provide substantially uniform amounts of mass exhaust gas flow. The one or more flow guide deflectors can be configured to concentrate the flow of exhaust gases in a region of the flow divider. In some implementations, the decomposition reactor includes one or more swirl diverters coupled to the flow divider and positioned adjacent to the outlet of the external component. The one or more swirl diverters provide a vorticious movement to a combined flow of reducer and exhaust gas that exits the outlet. BRIEF DESCRIPTION
[011] [011] Details of one or more implementations are shown in the attached drawings and in the description below. Other features, aspects and advantages of the disclosure will be evident from the description, drawings and claims, in which:
[012] [012] Figure 1 is a schematic block diagram of an exemplary selective catalytic reduction system that has an exemplary reducer release system for an exhaust system;
[013] [013] Figure 2 is a perspective view of an implementation of a reducer decomposition reactor;
[014] [014] Figure 3 is a left side view of the reducer decomposition reactor in Figure 2;
[015] [015] Figure 4 is a view of the right side of the reducer decomposition reactor of Figure 2;
[016] [016] Figure 5 is a top view of the reducer decomposition reactor in Figure 2;
[017] [017] Figure 6 is a cross-sectional view of the reducer decomposition reactor in Figure 2 showing an exhaust gas flow path;
[018] [018] Figure 7 is a cross-sectional view of the reducer decomposition reactor in Figure 2;
[019] [019] Figure 8 is a cross-sectional view of the reducer decomposition reactor in Figure 2 showing its lower components;
[020] [020] Figure 9 is a cross-sectional view of the reducer decomposition reactor in Figure 2 showing its upper components;
[021] [021] Figure 10 is a top cross-sectional view of the reducer decomposition reactor in Figure 2;
[022] [022] Figures 11A and 11B show graphical diagrams of reducer particle flow paths within the reducer decomposition reactor of Figure 2;
[023] [023] Figure 12 is a graphical diagram of exhaust gas particle flow paths within the reducer decomposition reactor of Figure 2;
[024] [024] Figure 13 is a graphical diagram of particle speeds within the reducer decomposition reactor of Figure 2 at an outlet;
[025] [025] Figures 14A and 14B are a cross-section and right side view of an implementation of the reducer decomposition reactor in Figure 2 with slits formed in a flow divider that separates a main flow chamber from a chamber thermal management;
[026] [026] Figures 15A, 15B and 15C are a partial perspective view, from the left and right side of an implementation of the reducer decomposition reactor of Figure 2 with fins formed in a flow divider that separates a flow chamber main from a thermal management chamber;
[027] [027] Figure 16 is a cross-sectional view of an implementation of the reducer decomposition reactor in Figure 2 with a flow bypass feature;
[028] [028] Figures 17A and 17B are a cross-section and right side view of an implementation of the reducer decomposition reactor in Figure 2 with a transition to a square outlet;
[029] [029] Figures 18A and 18B are a cross-sectional and partial perspective view of an implementation of the reducer decomposition reactor in Figure 2 with perforations formed in a flow divider that separates a main flow chamber from a chamber thermal management;
[030] [030] Figures 19A, 19B and 19C are a cross-sectional and right side view of implementations of the reducer decomposition reactor of Figure 2 with an internal exhaust auxiliary bypass;
[031] [031] Figures 20A and 20B are a view of the left side of the reducer decomposition reactor of Figure 2 with a reducer doser in a first angular position and a second angular position in relation to the decomposition reactor;
[032] [032] Figure 21 is a cross-sectional view of an implementation of the reducer decomposition reactor of Figure 2 with an angular opening for one or more flow guide deflectors;
[033] [033] Figure 22 is a perspective view of an implementation of the reducer decomposition reactor of Figure 2 with one or more angular flow guide deflectors positioned within the thermal management flow path;
[034] [034] Figure 23 is a perspective view of another implementation of a reducer decomposition reactor;
[035] [035] Figure 24 is a left side view of the reducer decomposition reactor in Figure 23;
[036] [036] Figure 25 is a view of the right side of the reducer decomposition reactor of Figure 23;
[037] [037] Figure 26 is a top view of the reducer decomposition reactor in Figure 23;
[038] [038] Figure 27 is a cross-sectional view of the reducer decomposition reactor in Figure 23 showing an exhaust gas flow path;
[039] [039] Figure 28 is a cross-sectional view of the reducer decomposition reactor in Figure 23;
[040] [040] Figure 29 is another cross-sectional view of the reducer decomposition reactor in Figure 23 showing the flow path of the exhaust gas;
[041] [041] Figure 30 is a graphical diagram of reducer particle flow paths within the reducer decomposition reactor of Figure 23;
[042] [042] Figure 31 is a graphical diagram of exhaust gas particle flow paths within the reducer decomposition reactor of Figure 23;
[043] [043] Figure 32 is a graphical diagram of particle speeds within the reducer decomposition reactor of Figure 23 at an outlet;
[044] [044] Figure 33 is a graphical diagram of particle speeds within the reducer decomposition reactor of Figure 23 at an outlet;
[045] [045] Figures 34A and 34B are a cross-sectional view of the left and front side of an implementation of the reducer decomposition reactor of Figure 23 with blades positioned inside the inlet;
[046] [046] Figures 35A and 35B are a cross-sectional view of the left and front side of an implementation of the reducer decomposition reactor of Figure 23 with a flange with fins at the entrance;
[047] [047] Figure 36 is a cross-sectional view on the left side of an implementation of the reducer decomposition reactor of Figure 23 with a perforated cone;
[048] [048] Figures 37A and 37B are a cross-sectional view of the left and front side of an implementation of the reducer decomposition reactor of Figure 23 with conical slits and / or flanges formed in a cone at an outlet;
[049] [049] Figures 38A and 38B are a cross-sectional and partial perspective view of an implementation of the reducer decomposition reactor of Figure 23 with perforations formed in a wall of the thermal management flow path;
[050] [050] Figures 39A and 39B are a cross-sectional and partial perspective view of an implementation of the reducer decomposition reactor of Figure 23 with an auxiliary exhaust bypass;
[051] [051] Figure 40 is a cross-sectional view of the reducer decomposition reactor of Figure 23 with a reducer doser in a central mounting position in relation to the decomposition reactor; and
[052] [052] Figures 41A and 41B are a partial cross-sectional and left side view of an implementation of the reducer decomposition reactor in Figure 23 with an externally mounted reducer doser.
[053] [053] It will be recognized that some or all of the Figures are schematic representations for purposes of illustration. The Figures are provided for the purpose of illustrating one or more implementations, with the explicit understanding that they will not be used to limit the scope or meaning of the claims. DETAILED DESCRIPTION
[054] [054] Below are more detailed descriptions of various concepts related to methods, devices and systems, and their implementations for reducer decomposition chambers. The various concepts presented above and discussed in more detail below can be implemented in different ways, since the concepts described are not limited to any specific way of implementation. Examples of specific implementations and applications are provided primarily for purposes of illustration. Overview
[055] [055] In exhaust aftertreatment systems, a decomposition reactor chamber is used to leave the metered reducer mixture with the exhaust gases upstream of a catalyst to reduce compounds in the exhaust gas into compounds more neutral. In some implementations, a long linear decomposition reactor chamber can be used to allow sufficient residence time for the metered reducer to mix with the exhaust gases flowing through the after-treatment system. However, space limitations can restrict the available length of the decomposition reactor chamber. A reduced length can limit the residence time, which can affect the uniformity of reducer dispersion, and / or can result in the formation of reducer deposits.
[056] [056] A compact decomposition reactor chamber with reduced length can provide sufficient residence time for the reducer to disperse in the exhaust gas that is flowing. In some implementations, a compact decomposition reactor chamber can be a U-shaped or V-shaped chamber where the inlet and outlet are located on the same side or on the same plane, as a flow path configuration for the flue gases. zigzag escape. For such compact decomposition reactor chambers, several factors can be considered, such as maximizing flow uniformity and reducer evaporation, minimizing reducer deposits, minimizing the environmental effects on the exhaust gas flow through the outlet, minimizing the drop or pressure restriction, minimize the space requirement of the decomposition reactor chamber and / or minimize the cost. The implementations described in the present invention optimize one or more of the factors mentioned above and, at the same time, reduce the size or cross-sectional and axial projection area of the decomposition reactor. II. Post-treatment system overview
[057] [057] Figure 1 represents an exhaust gas aftertreatment system 100 that has an exemplary reducer release system 110 for an exhaust system 190. Aftertreatment system 100 includes a particulate filter, for example , a particulate filter for diesel engines ("DPF" - diesel particulate filter) 102, the reducer release system 110, a decomposition reactor chamber or tube 104, an RCS catalyst 106 and a sensor 150.
[058] [058] The DPF 102 is configured to remove particulate material, such as soot, from the exhaust gases that flow into the exhaust system 190. The DPF 102 includes an inlet, into which the exhaust gas is received, and an outlet, from the which exhaust gas comes out after having the particulate material substantially filtered from the exhaust gas and / or after converting the particulate matter into carbon dioxide.
[059] [059] The decomposition chamber 104 is configured to convert a reducer, such as urea or diesel exhaust fluid (EDF), to ammonia. The decomposition chamber 104 includes a reducer release system 110 that has a doser 112 configured to dose the reducer into the decomposition chamber 104. In some implementations, the reducer is injected upstream of the RCS catalyst 106. The droplets of reducers are then subjected to evaporation, thermolysis and hydrolysis processes to form gaseous ammonia in the exhaust system 190. The decomposition chamber 104 includes a fluid communication port with the DPF 102 to receive the exhaust gas containing NOx emissions and an outlet for the remaining exhaust gas, NOx emissions, ammonia and / or reducer to flow into the RCS 106 catalyst.
[060] [060] The decomposition chamber 104 includes the doser 112 mounted in the decomposition chamber 104 so that the doser 112 can dose the reducer in the exhaust gases flowing in the exhaust system 190. The doser 112 can include an insulator 114 interposed between a portion of the feeder 112 and the portion of the decomposition chamber 104 in which the feeder 112 is mounted. The feeder 112 is fluidly coupled to one or more reducer sources 116. In some implementations, a pump 118 can be used to pressurize the reducer from reducer source 116 for release to the feeder 112.
[061] [061] Doser 112 and pump 118 are also electrically or communicatively coupled to a controller 120. Controller 120 is configured to control doser 112 to dose the reducer in the decomposition chamber 104. Controller 120 can also be configured to control the pump 118. Controller 120 may include a microprocessor, an application-specific integrated circuit ("ASIC"), a field-programmable gate array ("FPGA") , etc., or combinations thereof.
[062] [062] The RCS 106 catalyst is configured to assist in reducing NOx emissions by accelerating a NOx reduction process between ammonia and NOx in the exhaust gas in diatomic nitrogen, water and / or carbon dioxide. The RCS catalyst 106 includes an entry in fluid communication with the decomposition chamber 104 from which the exhaust gas and the reducer are received and an output in fluid communication with one end of the exhaust system 190.
[063] [063] The exhaust system 190 may additionally include an oxidation catalyst, for example, a diesel oxidation catalyst (DOC), in fluid communication with the exhaust system 190 (for example, downstream of the RCS catalyst 106 or upstream of DPF 102) to oxidize hydrocarbons and carbon monoxide in the exhaust gases.
[064] [064] In some implementations, DPF 102 can be positioned downstream of the decomposition chamber or reactor tube 104. For example, DPF 102 and RCS catalyst 106 can be combined into a single unit, such as a DPF with RCS (SDPF) coating. In some implementations, the doser 112 may instead be positioned downstream of a turbocharger or upstream of a turbocharger.
[065] [065] The sensor 150 can be coupled to the exhaust system 190 to detect an exhaust gas condition flowing through the exhaust system 190. In some implementations, the sensor 150 may have a portion arranged in the exhaust system 190, as a tip of the sensor 150 that can extend to a portion of the exhaust system 190. In other implementations, the sensor 150 can receive exhaust gas through another duct, such as a sample pipe that extends from the exhaust system 190. Although sensor 150 is represented as downstream of the RCS 106 catalytic converter, it should be understood that sensor 150 can be positioned in any other position on exhaust system 190, including upstream of DPF 102, within DPF 102 , between DPF 102 and decomposition chamber 104, within decomposition chamber 104, between decomposition chamber 104 and RCS catalyst 106, within RCS catalyst 106, or downstream of RCS catalyst 106. In addition , two or more sensors 150 can be used to detect an exhaust gas condition, such as two, three, four, five or six sensors 150, with each sensor 150 located in one of the aforementioned positions of the exhaust system 190. III. Decomposition reactor implementations for an after-treatment system
[066] [066] Figures 2 to 10 represent an implementation of a U 200 shaped decomposition reactor that can improve the evaporator, mixing and heat transfer of the reducer with exhaust gases flowing through it with a center distance the reduced center between an inlet and outlet of the decomposition reactor 200. The decomposition reactor 200 includes a main flow chamber 202 and a thermal management chamber 250. The main flow chamber 202 may include one or more walls or partitions for form one or more channels. In the implementation shown, the decomposition chamber 200 includes an inlet 204 and an outlet 206 so that the flow of fluids through the decomposition reactor 200 flows in the direction 298 shown in Figure 6. Inlet 204 and outlet 206 are located in planes parallel so that the decomposition reactor 200 receives the exhaust gas in a first direction through inlet 204 and transmits a mixture of reducer and exhaust gases through outlet 206 in a second direction that is substantially opposite to the first direction (for example , substantially opposite the second direction means 180 degrees ± 5 degrees from the first direction). In other implementations, inlet 204 and outlet 206 may be located substantially on the same plane (for example, substantially means within a distance of 5% of the total height of the decomposition reactor 200). In still other implementations, inlet 204 and outlet 206 may be at an angle to each other (for example, a V-shaped decomposition chamber). In such implementations, the second direction of reducer and exhaust gas flow out of exit 206 is at an angle to the first direction. The angle can be 0 degrees, even up to 360 degrees. In still other implementations, input 204 and output 206 can be arranged like clock hands in relation to each other and / or a geometry axis of decomposition reactor 200, from 0 degrees, even up to 360 degrees. In this way, inlet 204 and outlet 206 can be oriented at any angle to each other and to decomposition reactor 200. Inlet 204 can include a flange or other mounting component to mechanically couple the inlet to an upstream component , such as another exhaust pipe or other aftertreatment device. Outlet 206 may also include a flange or other mounting component to mechanically couple outlet 206 to a downstream component, such as another exhaust pipe or other aftertreatment device.
[067] [067] The decomposition reactor 200 includes an external component 210 that connects input 204 to output 206 and that defines an internal volume of the decomposition reactor 200. External component 210 can be U-shaped, V-shaped or in any other configuration based on the orientation of inlet 204 with respect to decomposition reactor 200 and outlet 206. External component 210 includes an inner wall 222, side walls 212, an outer wall 232, an upper wall 214 and a lower wall 216 In the implementation shown, the inner wall 222, the sidewalls 212, the outer wall 232, the top wall 214 and the bottom wall 216 include smoothed curves and / or interfaces to provide a smoother fluid flow within the outer component 210 and greater structural strength. In other implementations, the inner wall 222, the sidewalls 212, the outer wall 232, the top wall 214 and the bottom wall 216 can be flat walls to define a box-like structure.
[068] [068] In some implementations, the external component 210 can be formed by two or more parts. For example, in the implementation shown, outer component 210 has an inner member 220, an outer member 230 and a dosing assembly member 240 that can be formed and / or stamped separately and then coupled (for example, welded or otherwise mode, connected) on or from external component 210. The configuration of multiple components may allow variations of the different members 220, 230, 240 to vary the performance, dimensioning, positioning or other features of the decomposition reactor 200.
[069] [069] The inner member 220 defines an inner wall 222 for the decomposition reactor 200 and can include one or more openings and / or bezels 228 for coupling one or more components to the decomposition reactor 200, as sensors. The inner wall 222 may have a flat inner surface, a curved inner surface or a combination thereof and extends from a portion of the inlet 204 to a portion of the outlet 206. The inner wall 222 may also include one or more portions of the sidewall 223 that define a portion of the side walls 212 of the decomposition reactor
[070] [070] The outer member 230 defines at least part of an outer wall 232 of the decomposition reactor 200. The outer wall 232 may have a flat outer surface or may have a curved outer surface. In some cases, the outer wall 232 may have a flat portion and a curved portion, such as a flat portion upstream that changes to a curved portion downstream. The outer member 230 also includes one or more sidewall portions 233 which, when coupled to one or more sidewall portions 223 of the inner member 220, define the sidewalls 212 of the outer member 210. To one or more sidewall portions 233 can also be flat walls, curved walls or a combination thereof. The outer member 230 further defines the bottom wall 216 to connect the outer wall 232 to outlet 206. In some cases, the outer member 230 may include one or more openings and / or bezels for coupling one or more components to the decomposition reactor 200, as sensors.
[071] [071] The dosing mounting member 240 includes a dosing crimp 242 and defines the upper wall 214 of the outer member 210. In some implementations, the dosing mounting member 240 may also include a portion of the outer wall 232 and / or side walls 212. In the implementation shown, the dosing mounting member 240 includes a recess or other feature to form a flat surface for crimping the dosing 242. In other instances, the dosing mounting member 240 may include a protrusion or other feature for forming a flat surface for crimping the doser 242. In still other cases, the mounting member of the doser 240 may include an opening for an interface member that includes a surface to which the crimping of the doser 242 is coupled. The setting of the doser 242 includes an opening through which a portion of a doser or a nozzle can be inserted into the external component 210 to dose the reducer or other fluid therein. The dosing crimp 242 also includes one or more fastening features, such as pin holes, flanges for welding fastening etc., to couple a metering to the dosing crimp 242.
[072] [072] Within external component 210, decomposition reactor 200 includes a flow divider 260 that divides main flow chamber 202 from thermal management chamber 250 and defines the shape and size of main flow chamber 202 (best shown in Figure 9) in cooperation with the inner wall 222 of the inner member 220. The main flow chamber 202 is fluidly coupled to the inlet 204 and the outlet 206. The flow divider 260 includes a downstream flange 262 for coupling to the outlet 206 and / or the outer member 210. The flow divider 260 also includes one or more flow guide deflectors 264 for coupling inlet 204 and / or the outer member 210. The downstream flange 262 and the one or more deflectors flow guide 264 mechanically couple flow divider 260 to outer member 210 so that exhaust gases can flow into flow divider 260 along main flow chamber 202 and thermal management chamber 250 defined by the space between the divis flowrate 260 and external component 210. Flow divider 260 includes an opening 266 through which the metered reducer is sprayed into the main flow chamber 202. The widest opening for the thermal management chamber 250 at the entrance 204 increases the mass flow of the exhaust gases and, in turn, increases the flow velocities through the opening 266. In some implementations, the dosing mounting member 240 may include a partition extending between the mounting member of the doser 240 and flow divider 260 downstream of opening 266 so that flow through the thermal management chamber is redirected 250 through opening 266 to provide an escape aid for the metered reducer sprayed into opening 266. On implementation shown, the dosing assembly member 240 includes a recess to reduce a distance between a dosing nozzle and the opening 266. The recess in the dosing assembly member 240 can re reduce the probability of recirculation and capture of reducer droplets in the dispenser. These features can be aligned in relation to the flow direction to help smooth the flow and prevent recirculation.
[073] [073] In the implementation shown, inlet 204 includes one or more blades 208 that extend along at least a portion of inlet 204. One or more blades 208 are shown as curved plates or aerodynamic profiles to redirect the flow of gases inlet exhaust into decomposition reactor 200. That is, one or more blades 208 are configured to redirect the flow of incoming exhaust gases from a first direction at entry 204 to a second direction that is different from the first direction. In some implementations, the one or more blades 208 may be flat plates. In some cases, one or more blades 208 may include perforations. In still other instances, turbulators, vanes or other flow control features may be included on one, or each, of one or more blades 208. One or more blades 208 may also reduce the likelihood of metered reducer droplets to travel. upstream out of entry 204.
[074] [074] The main flow chamber 202 also includes a mixer 290 inside the main flow chamber 202. The mixer 290 is coupled to the interior of the flow divider 260 and mixes the inlet exhaust gases with the metered reducer inside the reactor decomposition 200. In some implementations, mixer 290 may be a cross-shaped vane mixer located at a midpoint of the decomposition reactor 200 to aid in the breakdown of reducer droplets, reducing recirculation / flow separation due to redirection flow within decomposition reactor 200, and improving flow distribution. Alternatively, mixer 290 may be a flange with fins or swirling blades. The mixer 290 mixes the exhaust gas and the metered reducer inside the main flow chamber 202 and increases the mixture by reducing the particle size and improving the evaporation.
[075] [075] Thermal management chamber 250 is defined by the volume between flow divider 260 and external component 210. In the implementation shown, thermal management chamber 250 includes one or more flow guide deflectors 264 from inlet 204 and over at least a portion of the volume defined by the outer wall 232 and the flow divider 260. In some cases, the one or more flow guide deflectors 264 extends a distance that is greater than 50% of the length of the outer wall 232. In some cases, the one or more flow guide deflectors 264 extends a distance that is less than 50% of the length of the outer wall 232.
[076] [076] Flow divider 260 also includes one or more openings 268, such as perforations, slits, fins etc., through which the flow from the thermal management chamber 250 is recombined with the flow downstream of the main flow chamber 202. As noted above, a downstream flange 262 can be coupled to outlet 206 and / or outer component 210 to form a fluid seal from the flow divider with outlet 206 and / or outer component 210 so that the entire flow exhaust gas from the thermal management chamber 250 is directed through one or more openings 268. The one or more openings 268 can be drilled into the outlet of the thermal management chamber 250 to increase flow speed and reduce the impact of droplets reducer on the surface of the outlet end of the 260 flow divider. The perforated cone design can help prevent droplets from entering the thermal management chamber 250. In other implementations, at one or more opening s 268 can be slots, holes or bypass passages in other formats.
[077] [077] In operation, the inlet exhaust gas is divided into a first flow path through the main flow chamber 202 a second flow path through the thermal management chamber 250. A ratio between a first exposure area 280 of the flow from inlet 204 into main flow chamber 202 and a second exposure area 282 of flow into thermal management chamber 250 from inlet 204 controls the mass flow of inlet exhaust gases into the main flow 202 and thermal management chamber 250. The ratio between the first exposure area 280 and the second exposure area 282 may vary based on the system configuration, the dispenser, etc. In some implementations, the percentage ratio between the first exposure area 280 and the second exposure area 282 can be between 7%, inclusive, and 20%, inclusive.
[078] [078] The mass flow of the exhaust gases into the main flow chamber 202 is mixed with a metered reducer through the opening 266 in the flow divider 260 and flows downstream to the mixer 290 positioned inside the main flow chamber 202 to be further mixed. The mass flow of the exhaust gases from the thermal management chamber 250 is recombined with the mass flow of the exhaust gases from the main chamber at outlet 206 by reintroducing the mass flow of the exhaust gases from the thermal management chamber 250 through the one or more openings 268.
[079] [079] The derivation of the untreated exhaust gas flow through the thermal management chamber 250 is used to control a temperature of the flow divider 260 at the desired temperature, such as 160 degrees Celsius or more. In some implementations, the desired temperature can be 200 degrees Celsius. In some implementations, the desired temperature may be higher than a surface exposed to an ambient temperature. For example, the thermal management chamber 250 can maintain the flow divider 260 at a temperature of 200 degrees Celsius while an external wall, such as a system without the thermal management chamber, can reach only a temperature of 115 degrees Celsius. Through the temperature control of the flow divider 260 at the desired temperature, the droplets of metered reducer that come in contact with the flow divider 260 evaporate to reduce the formation of deposits, even if the wall moistening occurs on a wall surface. internal flow divider 260.
[080] [080] The one or more flow guide deflectors 264 provided in the thermal management chamber 250 spread the untreated exhaust gas flow within the thermal management chamber 250 to provide passive thermal management control. For example, the one or more flow guide deflectors 264 can be evenly spaced to provide substantially uniform amounts of mass flow of the exhaust gases through different portions of the thermal management chamber 250 so that the flow divider 260 is maintained at a substantially uniform temperature. In other instances, the one or more flow guide deflectors 264 may be asymmetrically spaced to provide varying amounts of mass flow of the exhaust gases through different portions of the thermal management chamber 250 so that the flow divider 260 is maintained on a desired gradient or temperature profile.
[081] [081] In other cases, the one or more flow guide deflectors 264 may direct more or less mass flow of the exhaust gases to different regions of the flow divider 260 to provide increased or decreased temperatures in different portions of the flow divider 260. For example, one or more flow guide deflectors 264 can be configured to concentrate untreated exhaust gas flow in a region of flow divider 260 where deposit formation is likely. That is, a distance between two of the one or more flow guide deflectors
[082] [082] In some implementations, a portion of the untreated exhaust gas along the second flow path in the thermal management chamber can be redirected by the partition that extends between the dosing assembly member 240 and the flow divider 260 a downstream of aperture 266 so that the flow through the thermal management chamber is redirected 250 through aperture 266 to provide an escape aid for the metered reducer sprayed into aperture 266. In other instances, the partition can be omitted and the exhaust flow within the thermal management chamber 250 may further flow through opening 266 to provide an escape aid for the metered gearbox.
[083] [083] In some implementations, the decomposition reactor 200 may include smoothed inlet and outlet corners and / or curved rear and side walls to provide a smoother flow transition over a more compact decomposition reactor width over a distance reduced center to center between inlet 204 and outlet 206. Smoothed corners and / or walls can reduce recirculation flow and flow separation, which can improve flow distribution and uniformity within decomposition reactor 200 Curved back and / or side walls can also increase structural strength and reduce acoustic vibrations from the decomposition reactor 200.
[084] [084] Figures 11A and 11B illustrate particle flow paths within the reducer decomposition reactor 200 and show the redirection of reducer particles out of one or more blades 208 at inlet 204 to reduce upstream sprinkler sprinkling. . Figure 12 illustrates flow paths of exhaust particles within the reducer decomposition reactor 200 from inlet 204 to outlet 206, including the flow paths of components upstream and downstream or exhaust pipe. Figure 13 represents the particle velocities within the reducer decomposition reactor 200 at outlet 206, which shows substantially uniform velocities at the outlet.
[085] [085] Figure 14 illustrates an implementation of the decomposition reactor 200 with slits 300 or fins formed on the downstream flange 262. Slits 300 can form jets of exhaust gas with greater speed in relation to the speed of the exhaust gases flowing through main flow chamber 202 to redirect the exhaust gas flow out of outlet 206 and / or reduce the likelihood of reducing droplet formation between downstream flange 262 and outlet 206.
[086] [086] Figures 15A, 15B and 15C show an implementation of the decomposition reactor 200 with fins 310 formed in the flow divider 260 and positioned adjacent to the entry 204.
[087] [087] Figure 16 illustrates an implementation of the decomposition reactor 200 with a flow diversion feature 320 formed in the flow divider 260. The flow diversion feature 320 is a recess or protuberance in the main flow chamber 202 to reduce flow recirculation.
[088] [088] Figures 17A and 17B show an implementation of decomposition reactor 200 with a transition to a square outlet 330 instead of circular outlet 206. Obviously other geometric configurations for outlet 206 and / or inlet 204 can be implemented, such as triangular, rectangular, hexagonal, octagonal etc.
[089] [089] Figures 18A and 18B show an implementation of the decomposition reactor 200 with perforations 340 formed in the flow divider 260 so that the exhaust gas flow from the thermal management chamber 250 is transferred to the main flow chamber 202.
[090] [090] Figures 19A, 19B and 19C show an implementation of the decomposition reactor 200 with an internal exhaust auxiliary bypass 350. The internal exhaust auxiliary bypass 350 includes a wall 352 that separates the internal exhaust auxiliary bypass 350 from the main flow 202 to define a bypass chamber 354. The internal auxiliary exhaust bypass 350 includes an opening 356 for collecting exhaust gas from inlet 204 and an outlet 358 to expel gas collected at outlet 206. The internal auxiliary exhaust bypass 350 can speed up the exhaust gas at outlet 206 to reduce flow recirculation and thus the likelihood of reducer droplets being deposited on an inner wall of a downstream component.
[091] [091] Figures 20A and 20B show an implementation of the decomposition reactor 200 with a reducer doser 360 mounted in a first angular position and also in a second angular position in relation to the decomposition reactor 200. Thus, the setting of the doser 242 can be positioned anywhere on the dosing member 240 and / or anywhere else on the external component 210.
[092] [092] Figure 21 illustrates an implementation of decomposition reactor 200 with an angled opening for one or more flow guide deflectors 264 from inlet 204 to opening 266 formed through flow divider 260. Angled opening may allow a greater mass flow of exhaust gas is captured at inlet 204 and transported through aperture 266 to provide additional speed to the metered reducer through it.
[093] [093] Figure 22 illustrates an implementation of the decomposition reactor 200 with angled flow guide deflectors 264 positioned inside the thermal management chamber 250.
[094] [094] Figures 23 to 29 represent another implementation of a U 400 shaped decomposition reactor that can improve the evaporator, mixing and heat transfer of the reducer with exhaust gases flowing through it with a center distance the reduced center between an inlet and an outlet of the decomposition reactor 400. The decomposition reactor 400 includes a main flow chamber 402 and a thermal management chamber 450. The main flow chamber 402 can include one or more walls or partitions for form one or more channels. In the implementation shown, the decomposition chamber 400 includes an inlet 404 and an outlet 406 so that the flow of fluids through the decomposition reactor 400 flows in the direction 498 shown in Figure 27. Inlet 404 and outlet 406 are located in planes parallel so that the decomposition reactor 400 receives the exhaust gas in a first direction through inlet 404 and transmits a mixture of reducer and exhaust through outlet 406 in a second direction that is substantially opposite the first direction (for example , substantially opposite the second direction means 180 degrees ± 5 degrees from the first direction). In other implementations, the inlet 404 and the outlet 406 can be located substantially on the same plane (for example, substantially means within a distance of 5% of the total height of the decomposition reactor 200). In other implementations, input 404 and output 406 may be at an angle to each other (for example, a V-shaped decomposition chamber). In such implementations, the second direction of reducer and exhaust gas flow out of outlet 406 is at an angle to the first direction. The angle can be 0 degrees, even up to 360 degrees. In still other implementations, input 204 and output 206 can be arranged like clock hands in relation to each other and / or a geometry axis of decomposition reactor 200, from 0 degrees, even up to 360 degrees. In this way, inlet 204 and outlet 206 can be oriented at any angle to each other and to decomposition reactor 200. Inlet 404 can include a flange or other mounting component to mechanically couple the inlet to an upstream component , such as another exhaust pipe or other aftertreatment device. Outlet 406 may also include a flange or other mounting component to mechanically couple outlet 406 to a downstream component, such as another exhaust pipe or other aftertreatment device.
[095] [095] The decomposition reactor 400 includes an external component 410 that connects input 404 to output 406 and that defines an internal volume of the decomposition reactor 400. External component 410 can be U-shaped, V-shaped or in any other configuration based on the orientation of inlet 204 with respect to decomposition reactor 200 and outlet 206. External component 410 includes an inner wall 422, side walls 412, an outer wall 432, an upper wall 414 and a lower wall 416 In the implementation shown, the inner wall 422, the sidewalls 412, the outer wall 432, the top wall 414 and the bottom wall 416 include smoothed curves and / or interfaces to provide a smoother fluid flow within the outer component 410 and greater structural strength. In other implementations, the inner wall 422, the sidewalls 412, the outer wall 432, the top wall 414 and the bottom wall 416 can be flat walls to define a box-like structure.
[096] [096] In some implementations, the external component 410 can be formed by two or more parts. For example, in the implementation shown, outer component 410 has an inner member 420, an outer member 430 and a dosing mounting member 440 that can be formed and / or stamped separately and then coupled (for example, welded or otherwise connected) on or from external component 410. The configuration of multiple components may allow variations of the different members 420, 430, 440 to vary the performance, dimensioning, positioning or other features of the decomposition reactor 400.
[097] [097] The inner member 420 defines an inner wall 422 for the decomposition reactor 400 and can include one or more openings and / or bezels 428 for coupling one or more components to the decomposition reactor 400, as sensors. The inner wall 422 may have a flat inner surface, a curved inner surface or a combination thereof and extends from a portion of the inlet 404 to a portion of the outlet 406. The inner wall 422 may also include one or more portions of the sidewall 423 that define a portion of the side walls 412 of the decomposition reactor
[098] [098] The outer member 430 defines at least part of an outer wall 432 of the decomposition reactor 400. The outer wall 432 may have a flat outer surface or may have a curved outer surface. In some cases, the outer wall 432 may have a flat portion and a curved portion, such as an upstream flat portion that changes to a downstream curved portion. The outer member 430 also includes one or more sidewall portions 433 which, when coupled to one or more sidewall portions 423 of the inner member 420, define the sidewalls 412 of the outer member 410. To one or more sidewall portions 433 can also be flat walls, curved walls or a combination thereof. The outer member 430 further defines the bottom wall 416 to connect the outer wall 432 to outlet 406. In some cases, the outer member 430 may include one or more openings and / or bezels for coupling one or more components to the decomposition reactor 400, as sensors.
[099] [099] The dosing mounting member 440 includes a dosing crimp 442 and defines the upper wall 414 of the outer member 410. In some implementations, the dosing mounting member 440 may also include a portion of the outer wall 432 and / or side walls 412. In the implementation shown, the dosing mounting member 440 includes a recess or other feature to form a flat surface for crimping the dosing 442. In other instances, the dosing mounting member 440 may include a protrusion or other feature for forming a flat surface for crimping the doser 442. In still other cases, the mounting member of the metering 440 may include an opening for an interface member that includes a surface to which the metering crimping 442 is coupled. The dispenser bezel 442 includes an opening through which a portion of a dispenser or a nozzle can be inserted into the external component 410 to dose the reducer or other fluid therein. The dosing crimp 442 also includes one or more fastening features, such as pin holes, flanges for welding fastening etc., to couple a metering to the dosing crimp
[0100] [0100] Inside external component 410, decomposition reactor 400 includes a flow divider 460 that divides main flow chamber 402 from thermal management chamber 450 and defines the shape and size of main flow chamber 402 (best shown in Figure 29) in cooperation with the inner wall 422 of the inner member 420. The main flow chamber 402 is fluidly coupled to the inlet 404 and the outlet 406. The flow divider 460 includes a downstream flange 462 for coupling to the outlet 406 and / or the outer member 410. The flow divider 460 also includes one or more flow guide deflectors 464 for coupling inlet 404 and / or the outer member 410. Downstream flange 462 and one or more deflectors flow guide 464 mechanically couple flow divider 460 to outer member 410 so that the exhaust gases can flow into flow divider 460 along main flow chamber 402 and thermal management chamber 450 defined by the space between the div flow isor 460 and external component 410. The flow divider 460 includes an opening 466 through which the metered reducer is sprayed into the main flow chamber 402. The widest opening for the thermal management chamber 450 at the entrance 404 increases the mass flow of the exhaust gases and, in turn, increases the flow velocities through the opening 466. In some implementations, the dosing mounting member 440 may include a partition extending between the mounting member of the doser 440 and flow divider 460 downstream of aperture 466 so that flow through the thermal management chamber is redirected 450 through aperture 466 to provide an escape aid for the metered reducer sprayed into aperture 466. On implementation shown, the dosing mounting member 440 includes a recess to reduce a distance between a dosing nozzle and the opening 466. The recess in the dosing mounting member 440 can reduce the likelihood of recirculation and capture of reducer droplets in the dispenser. These features can be aligned in relation to the flow direction to help smooth the flow and prevent recirculation.
[0101] [0101] In the implementation shown, inlet 404 includes one or more blades 408 that extend along at least a portion of inlet 404. One or more blades 408 are shown as curved plates or aerodynamic profiles to redirect the flow of gases inlet exhaust into decomposition reactor 400. That is, one or more blades 408 are configured to redirect the flow of inlet exhaust gases from a first direction at inlet 404 to a second direction that is different from the first direction. In some implementations, the one or more blades 408 can be flat plates. In some cases the one or more blades 408 may include perforations. In still other instances, turbulators, vanes or other flow control features can be included in one, or each, of one or more 408 blades. One or more 408 blades can also reduce the likelihood of metered reducer droplets to travel. upstream out of entry 404.
[0102] [0102] The main flow chamber 402 is separated into a first chamber 470 and a second chamber 480 (best shown in Figure 29). A first curved partition 478 in main flow chamber 402 separates a first treated reducer and exhaust gas flow in the first chamber 470 from an untreated exhaust gas flow in the second chamber 480. By providing a flow configuration untreated and untreated, the design reduces the pressure drop from inlet 404 to outlet 406 of decomposition reactor 400 while the flow of untreated exhaust gas through second chamber 480 helps to maintain a higher temperature of the inner walls to reduce the deposit formation. The dual chamber design 470, 480 also channels the exhaust gas flow into one or more swirl diverters 488. The second curved partition 458 separates the untreated flow in the main flow chamber 402 from the untreated exhaust flow in the thermal management chamber 450. The curvature of the first and second partitions 478, 458 aids in the smooth transition of the exhaust gas flow from the second chamber 480 and the thermal management chamber 450 in a downstream portion of the main flow chamber 402 a be combined at the exit
[0103] [0103] The first chamber includes a mixer 490 inside the first chamber 470 and positioned adjacent to the inlet 404 and downstream of the opening 466 for the metered reducer. The mixer 490 is coupled to the interior of the flow divider 460 and mixes the inlet exhaust gases with the metered reducer inside the decomposition reactor 400. In some implementations, the mixer 490 can be a mixer with cross-shaped vanes for assist in the breakdown of reducer droplets, reducing flow recirculation / separation due to flow redirection, and improving flow distribution within the 400 decomposition reactor. Alternatively, the 490 mixer can be a flange with vane or swirling blades. The mixer 490 mixes the exhaust gas and the metered reducer inside the first chamber 470 and increases the mixture by reducing the particle size and improving the evaporation.
[0104] [0104] The exhaust gas flows from the first chamber 470 and the second chamber 480 are recombined in the downstream portion of the main flow chamber 402 at an entrance to the one or more swirl diverters 488. The one or more swirl diverters 488 are configured to give a whirlwind or vorticose movement to the combined exhaust gas and reducer flow to increase the distance traveled, which in turn provides more time for evaporation and mixing of the reducer and exhaust gas from the flow treated from the first chamber 470 and the untreated flow from the second chamber 480. The position, size and location of one or more swirl diverters 488 help to distribute the flow evenly, minimize pressure drop and allow a smooth flow transition combined exhaust gas. In some implementations, the one or more swirl deflectors 488 may, instead, be a straight or curved cone incorporating perforations, slits or other features.
[0105] [0105] Thermal management chamber 450 is defined by the volume between flow divider 460 and external component 410. In the implementation shown, thermal management chamber 450 includes one or more flow guide deflectors 464 from inlet 404 and over at least a portion of the volume defined by the outer wall 432 and the flow divider 460. In some cases, the one or more flow guide baffles 464 extends a distance that is greater than 50% of the length of the outer wall 432. In some cases, the one or more flow guide baffles 464 extends a distance that is less than 50% of the length of the outer wall 432.
[0106] [0106] In the implementation shown, the second partition 458 includes one or more openings 468, such as perforations, slits, fins etc., through which the flow from the thermal management chamber 450 is recombined with the flow downstream of the heating chamber. main flow 402. As noted above, a downstream flange 462 can be coupled to outlet 406 and / or external component 410 to form a fluid seal of the flow divider with outlet 406 and / or external component 410 so that all the exhaust gas flow from the thermal management chamber 450 is directed through one or more openings 468. The one or more openings 468 can be drilled into the outlet of the thermal management chamber 450 to increase flow speed and reduce impact of reducer droplets on the surface of the outlet end of the flow divider
[0107] [0107] In operation, the inlet exhaust gas is divided into a first flow path through the main flow chamber 402 a second flow path through the thermal management chamber 450 shown in Figure 29. A ratio between a first area of exposure 492 of the flow from the inlet 404 into the main flow chamber 402 and a second area of exposure 494 of the flow into the thermal management chamber 250 from the inlet 404 controls the mass flow of the exhaust gases from entry into main flow chamber 402 and thermal management chamber 450. The ratio of the first exposure area 492 to the second exposure area 494 can vary based on the system configuration, the feeder, etc. In some implementations, the percentage ratio between the first exposure area 492 and the second exposure area 494 can be between 7%, inclusive, and 20%, inclusive.
[0108] [0108] The mass flow of exhaust gases goes into the main flow chamber 402 and is divided into the first chamber 470 and the second chamber 480 as also shown in Figure 29. The mass flow of exhaust gases that goes for the first chamber 470 it is mixed with a metered reducer through the opening 466 in the flow divider 460 and flows downstream to the mixer 490 positioned inside the first chamber 470 to be further mixed. The mass flow of exhaust gases going to the second chamber 480 is not mixed so much with the metered reducer and flows to the second chamber 480 for additional thermal management and improved pressure drop. The mass flow of exhaust gases from the thermal management chamber 450 is recombined with the mass flow of exhaust gases from the main chamber through the reintroduction of the mass flow of exhaust gases from the thermal management chamber 450 through one or more openings 468.
[0109] [0109] The derivation of untreated exhaust gas flow through thermal management chamber 450 is used to control a temperature of the flow divider 460 at the desired temperature, such as 160 degrees Celsius or more. In some implementations, the desired temperature can be 200 degrees Celsius. In some implementations, the desired temperature may be higher than a surface exposed to an ambient temperature. For example, the thermal management chamber 450 can maintain the flow divider 460 at a temperature of 200 degrees Celsius while an external wall, such as a system without the thermal management chamber, can reach only a temperature of 115 degrees Celsius. Through the temperature control of the flow divider 460 at the desired temperature, the droplets of metered reducer that come in contact with the flow divider 460 evaporate to reduce the formation of deposits, even if the wetting of the wall occurs on a wall surface. internal flow divider 460.
[0110] [0110] The one or more 464 flow guide deflectors provided in the thermal management chamber 450 spread untreated exhaust gas flow within the thermal management chamber 450 to provide passive thermal management control. For example, the one or more flow guide deflectors 464 can be evenly spaced to provide substantially uniform amounts of mass flow of the exhaust gases through different portions of the thermal management chamber 450 so that flow divider 460 is maintained at a substantially uniform temperature. In other instances, the one or more flow guide deflectors 464 may be asymmetrically spaced to provide varying amounts of mass flow of the exhaust gases through different portions of the thermal management chamber 450 so that the flow divider 460 is maintained on a desired gradient or temperature profile.
[0111] [0111] In other cases, the one or more flow guide deflectors 464 may direct more or less mass flow of the exhaust gases to different regions of the flow divider 460 to provide increased or decreased temperatures in different portions of the flow divider 460. For example, one or more flow guide deflectors 464 can be configured to concentrate untreated exhaust gas flow in a region of flow divider 460 where deposition is likely to form. That is, a distance between two of the one or more flow guide deflectors 464 may narrow or otherwise reduce a cross-sectional area for the exhaust gases flowing through a portion of the thermal management chamber 450 to increase the velocity of the exhaust gas flow along a corresponding portion of the flow divider 460. The higher velocity of the exhaust gas over the flow divider portion 460 increases the convective heat transfer, thereby increasing a temperature of that portion of the divider flow
[0112] [0112] In some implementations, a portion of the untreated exhaust gas along the second flow path in the thermal management chamber can be redirected by the partition that extends between the dosing mounting member 440 and the flow divider 460 a downstream of aperture 466 so that flow through the thermal management chamber is redirected 450 through aperture 466 to provide an escape aid for the metered gearbox sprayed into aperture 466. In other instances, the partition can be omitted and the exhaust flow within the thermal management chamber 450 may further flow through opening 466 to provide an escape aid for the metered gearbox.
[0113] [0113] Figure 30 illustrates particle flow paths within the reducer decomposition reactor 400 and shows the redirection of reducer particles out of one or more blades 408 at inlet 404 to reduce upstream sprinkler sprinkling. Figure 31 illustrates flow paths of exhaust particles within the reducer decomposition reactor 400 from inlet 404 to outlet 406, including the flow paths of components upstream and downstream or exhaust pipe. Figure 32 represents the particle speeds inside the reducer decomposition reactor 400 at output 406, which shows a velocity vortex with a lower speed at the center of output 206. Figure 33 illustrates exhaust particle flow paths in the inside the reducer decomposition reactor 400 at output 406.
[0114] [0114] Figures 34A and 34B illustrate an implementation of the decomposition reactor 400 with blades 500 positioned around a portion of the inlet 404 to impart a swirling or initial vorticous movement to the inlet exhaust gas flow.
[0115] [0115] Figures 35A and 35B illustrate an implementation of the decomposition reactor 400 with a flange with fins 510 and a perforated tube 516 positioned adjacent to inlet 404. The flange with fins 510 can be configured so that a first portion 512 direct the flow of incoming exhaust gases into the interior of the thermal management chamber 450 and a second portion 514 direct the flow of incoming exhaust gases into the interior of the second chamber 480. The perforated tube 516 may include one or more blades 518 on an upstream face to induce swirling or vorticating movement to the inlet exhaust flow before exiting into the first chamber 470 of the main flow chamber
[0116] [0116] Figures 38A and 38B illustrate an implementation of decomposition reactor 400 that can include one or more sets of perforations 540 formed in flow divider 460, either in place of or in addition to one or more openings 468. The one or more sets of perforations 540 can be positioned adjacent to outlet 406 to allow the exhaust gas flow from thermal management chamber 450 to flow into main flow chamber 402 at one or more angles to one or more diverters whirlwind 488.
[0117] [0117] Figures 39A and 39B illustrate an implementation of the decomposition reactor 400 showing one or more openings 468 in greater detail to provide an auxiliary escape bypass from the thermal management chamber 450 back to the main flow chamber 402.
[0118] [0118] Figure 40 illustrates an implementation of the decomposition reactor 400 with a reducer doser mounted in an internal region of the decomposition reactor
[0119] [0119] In some implementations, the decomposition reactor 400 may include smoothed inlet and outlet corners and / or curved rear and side walls to provide a smoother flow transition in a more compact decomposition reactor width with a distance reduced center-to-center between inlet 404 and outlet 406. Smoothed corners and / or walls can reduce recirculation flow and flow separation, which can improve flow distribution and uniformity within the decomposition reactor 400 Curved back and / or side walls can also increase structural strength and reduce acoustic vibrations from the 400 decomposition reactor.
[0120] [0120] The decomposition reactors 200, 400 provided here enable controlled mass flow division of the exhaust gas, thermal management by means of thermal management chambers, exhaust aid for metered reducer, blades at the entrance to help guide smoothly the exhaust gas into the main flow chamber to promote mixing, and angling a doser using the dosing crimp and direct reducer spraying on the exhaust gas flow to allow decomposition with minimal deposit formation on the while providing a high level of reducer uniformity at the output.
[0121] [0121] Although this specification contains several specific implementation details, these should not be interpreted as limitations on the scope of what can be claimed, but rather as descriptions of specific features for specific implementations. Certain features described in this specification, in the context of separate implementations, can also be implemented in a combined manner in a single implementation. On the other hand, several features described in the context of a single implementation can also be implemented in multiple implementations, separately or in any suitable subcombination. In addition, while the features may be described above as acting on certain combinations and even initially claimed in that way, one or more features of a claimed combination may, in some cases, be removed from the combination, and the claimed combination may be directed to a subcombination or a variation of a subcombination.
[0122] [0122] Similarly, although operations are represented in the drawings in a specific order, this should not be understood as requiring that such operations be performed in the specific order shown or in sequential order, or that all illustrated operations be performed, in order to achieve desirable results. In certain circumstances, the separation of various components of the system in the implementations described above should not be understood as requiring such separation in all implementations, and it should be understood that the components and systems described can generally be integrated into a single product or packaged in multiple products incorporated in tangible media.
[0123] [0123] As used in the present invention, the term "substantially" and similar terms are intended to have a broad meaning in harmony with common usage and accepted by those skilled in the art to which the subject of this disclosure refers. It should be understood by those skilled in the art who review the present disclosure, that these terms are intended to allow a description of certain features described and claimed, without restricting the scope of those features to the exact numerical ranges provided. Consequently, these terms are to be interpreted as indicating that insubstantial or inconsequential modifications or changes to the subject described and claimed are considered to be within the scope of the invention, as mentioned in the appended claims. Additionally, it is noted that limitations on claims should not be construed as constituting "means plus functions" limitations under United States patent laws of the United States.
[0124] [0124] The terms "coupled", "connected" and the like, as used here, mean the union of two members directly or indirectly with each other. Such a joint can be stationary (for example, permanent) or mobile (for example, removable or release). Such a union can be achieved with the two components or the two components and any additional intermediate components being integrally formed with each other as a single unitary body, or with the two components or the two components and any additional intermediate components being fixed to each other .
[0125] [0125] The terms "fluidly coupled", "in fluid communication" and the like, as used here, mean that the two components or objects have a route formed between the two components or objects in which a fluid, such as water, air can flow , gaseous reducer, gaseous ammonia, etc., with or without intermediate components or objects. Examples of fluid couplings or configurations to enable fluid communication may include piping, channels or any other suitable components to enable fluid to flow from one component or object to another.
[0126] [0126] It is important to note that the construction and layout of the system shown in the various exemplary implementations are of an illustrative and not restrictive nature. It is desired that all changes and modifications that are within the spirit and / or scope of the described implementations are protected. It must be understood that some resources may not be necessary and that implementations devoid of the various characteristics can be considered as within the scope of the request, the scope being defined by the following claims. When reading the claims, it is intended that when the words such as "one", "one", "at least one / one" or "at least a portion" are used, there is no intention to limit the claim to just one item, unless specifically stated otherwise in the claim.
When the terms "at least one portion" and / or "one portion" are used, the item may include a portion and / or the entire item, unless specifically stated otherwise.

权利要求:
Claims (25)
[1]
1. Decomposition reactor for an exhaust system FEATURED for understanding: an external component that defines an internal volume and has an inlet and an outlet, with the inlet and outlet being formed on the same side of the external component; and a flow divider positioned within the internal volume defined by the external component and coupled to the external component, the flow divider defining a thermal management chamber and a main flow chamber within the internal volume, the flow chamber being main is in fluid communication with the inlet and outlet, the thermal management chamber is in fluid communication with the inlet and a downstream portion of the main flow chamber adjacent to the outlet, and the flow divider comprises an opening through which the reducer is dosed in the main flow chamber; a first exhaust flow path flowing from the inlet into the main flow chamber to mix with the metered reducer through the opening in the flow divider and out of the outlet; and with a second exhaust flow path flowing from the inlet to the thermal management chamber to control a temperature of a portion of the flow divider and out through one or more openings formed in the flow divider in the main flow chamber.
[2]
2. Decomposition reactor according to claim 1, characterized in that it further comprises a mixer positioned inside the main flow chamber.
[3]
3. Decomposition reactor according to claim 1, CHARACTERIZED by additionally comprising one or more flow guide deflectors positioned in the thermal management chamber between the flow divider and the external component.
[4]
Decomposition reactor according to claim 3, CHARACTERIZED by one or more flow guide deflectors extending at least 50% of a length of an external wall of the external component.
[5]
5. Decomposition reactor according to claim 3, CHARACTERIZED that one or more flow guide deflectors are evenly spaced within the thermal management chamber to provide substantially uniform amounts of mass exhaust gas flow.
[6]
6. Decomposition reactor according to claim 3, CHARACTERIZED by one or more flow guide deflectors being configured to concentrate the flow of exhaust gases in a region of the flow divider.
[7]
7. Decomposition reactor according to claim 6, CHARACTERIZED in that the concentration of the exhaust gas flow in the region of the flow divider comprises reducing an area in cross section for the exhaust gas flowing through a portion of the thermal management adjacent to the region.
[8]
Decomposition reactor according to claim 3, CHARACTERIZED by one or more flow guide deflectors comprising flat plates.
[9]
Decomposition reactor according to claim 1, characterized in that one or more openings comprise perforated cones.
[10]
10. Decomposition reactor according to claim 1, further comprising one or more blades extending through at least a portion of the inlet and which are configured to redirect the exhaust gas flow from a first direction from from the entrance to a different second direction.
[11]
11. Decomposition reactor for an exhaust system FEATURED for understanding: an external component that defines an internal volume and has an inlet and an outlet, with the inlet and outlet being formed on the same side of the external component; a flow divider positioned within the internal volume defined by the external component and coupled to the external component, the flow divider defining a thermal management chamber and a main flow chamber within the internal volume, the main flow chamber being it is in fluid communication with the inlet and outlet, the thermal management chamber is in fluid communication with the inlet and a downstream portion of the main flow chamber adjacent to the outlet, and the flow divider comprises an opening through which the reducer it is dosed in the main flow chamber; and one or more swirl diverters coupled to the flow divider and positioned adjacent to the outlet of the external component; a first exhaust flow path flowing from the inlet into the main flow chamber to mix with the metered reducer through the opening in the flow divider and out of the outlet; and with a second exhaust flow path flowing from the inlet to the thermal management chamber to control a temperature of a portion of the flow divider and out through one or more openings formed in the flow divider in the main flow chamber.
[12]
Decomposition reactor according to claim 11, characterized in that it further comprises a mixer positioned inside the main flow chamber.
[13]
13. Decomposition reactor according to claim 11, CHARACTERIZED by additionally comprising one or more flow guide deflectors positioned in the thermal management chamber between the flow divider and the external component.
[14]
Decomposition reactor according to claim 13, CHARACTERIZED by one or more flow guide deflectors extending at least 50% of a length of an external wall of the external component.
[15]
Decomposition reactor according to claim 13, CHARACTERIZED by one or more flow guide deflectors being spaced evenly within the thermal management chamber to provide substantially uniform amounts of exhaust gas mass flow.
[16]
16. Decomposition reactor according to claim 13, CHARACTERIZED by one or more flow guide deflectors being configured to concentrate the flow of exhaust gases in a region of the flow divider.
[17]
17. Decomposition reactor according to claim 16, CHARACTERIZED in that the concentration of the exhaust gas flow in the region of the flow divider comprises reducing an area in cross section for the exhaust gas flowing through a portion of the thermal management adjacent to the region.
[18]
18. Decomposition reactor according to claim 11, CHARACTERIZED in that the main flow chamber comprises a partition that divides the main flow chamber into a first chamber and a second chamber, the first chamber receiving the first flow path exhaust gas and the second chamber receives a third exhaust gas flow path.
[19]
19. Decomposition reactor according to claim 18, characterized in that the first exhaust gas flow path of the first chamber and the third exhaust gas flow path of the second chamber are combined in the downstream portion of the flow chamber main and upstream of the one or more swirl deflectors.
[20]
20. Decomposition reactor for an exhaust system FEATURED for understanding: an external component that defines an internal volume and has an inlet and an outlet, with the inlet and outlet being formed on the same side of the external component; a flow divider positioned within the internal volume defined by the external component and coupled to the external component, the flow divider defining a thermal management chamber and a main flow chamber within the internal volume, the main flow chamber being it is in fluid communication with the inlet and outlet, the thermal management chamber is in fluid communication with the inlet and a downstream portion of the main flow chamber adjacent to the outlet, and the flow divider comprises an opening through which the reducer it is dosed in the main flow chamber; a mixer positioned inside the main flow chamber; and one or more flow guide deflectors positioned in the thermal management chamber between the flow divider and the external component; a first exhaust flow path flowing from the inlet into the main flow chamber to mix with the metered reducer through the opening in the flow divider and out of the outlet; and with a second exhaust flow path flowing from the inlet to the thermal management chamber to control a temperature of a portion of the flow divider and out through one or more openings formed in the flow divider in the main flow chamber.
[21]
21. Decomposition reactor according to claim 20, CHARACTERIZED by one or more flow guide deflectors extending at least 50% of a length of an external wall of the external component.
[22]
22. Decomposition reactor according to claim 20, CHARACTERIZED that one or more flow guide deflectors are evenly spaced within the thermal management chamber to provide substantially uniform amounts of mass exhaust gas flow.
[23]
23. Decomposition reactor according to claim 20, CHARACTERIZED by one or more flow guide deflectors being configured to concentrate the flow of exhaust gases in a region of the flow divider.
[24]
24. Decomposition reactor according to claim 20, characterized in that it comprises one or more swirl diverters coupled to the flow divider and positioned adjacent to the outlet of the external component.
[25]
25. Decomposition reactor according to claim 24, CHARACTERIZED by one or more swirl diverters providing a vorticating movement to a combined flow of exhaust and reducer gas leaving the outlet.

类似技术:

---

公开号 | 公开日 | 专利标题

---

BR112020003307A2|2020-08-25|reducer decomposition reactor chamber

---

KR101658341B1|2016-09-30|Mixing chamber

---

CN110017199B|2021-06-18|Exhaust gas aftertreatment device

---

US9964016B2|2018-05-08|Exhaust gas aftertreatment device

---

WO2019011036A1|2019-01-17|Tail gas after-treatment mixing device, and packaging therefor

---

WO2018068667A1|2018-04-19|Tail gas after-treatment device

---

US20180340457A1|2018-11-29|Mixing cavity assembly

---

WO2018006718A1|2018-01-11|Tail gas aftertreatment device

---

US9228471B2|2016-01-05|Mixing device for an exhaust system of a vehicle

---

CN107435576B|2021-06-01|Integrated exhaust gas aftertreatment system

---

CN106246308B|2019-10-29|Post-process discharge air separator and/or deflector

---

CN111042898A|2020-04-21|High-efficiency mixing and flow disturbing device meeting national six-standard U-shaped packaging SCR system

---

WO2016146015A1|2016-09-22|Mixing tube and exhaust gas treatment device thereof

---

CN109069997B|2021-04-23|Rotational flow mixed type tail gas post-treatment box and system

---

CN210033574U|2020-02-07|Integrated type tail gas post-treatment box

---

CN110073083B|2021-06-15|Exhaust gas aftertreatment device for a motor vehicle

---

US9174167B2|2015-11-03|Mixing plate providing reductant distribution

---

US20210332733A1|2021-10-28|Decomposition chamber for aftertreatment systems

---

WO2019140895A1|2019-07-25|Exhaust gas aftertreatment device

---

WO2021112826A1|2021-06-10|Reductant delivery system for exhaust gas aftertreatment system

---

CN113950571A|2022-01-18|System and method for mixing exhaust gas and reductant in an aftertreatment system

---

GB2595019A|2021-11-17|Systems and methods for mixing exhaust gas and reductant in an exhaust gas aftertreatment system

---

BR112014026166B1|2021-09-28|EXHAUST TREATMENT DEVICE

同族专利:

---

公开号 | 公开日

---

US10024217B1|2018-07-17|

---

US10408110B2|2019-09-10|

---

WO2019040127A1|2019-02-28|

---

CN109690042A|2019-04-26|

---

CN109690042B|2021-04-20|

---

CN113107646A|2021-07-13|

---

US20190063294A1|2019-02-28|

引用文献:

---

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

---

---

GB0113226D0|2001-06-01|2001-07-25|Nelson Burgess Ltd|Catalytic converter|

---

JP4928304B2|2007-02-23|2012-05-09|日野自動車株式会社|Exhaust purification device|

---

JP5132187B2|2007-05-18|2013-01-30|Ｕｄトラックス株式会社|Exhaust purification device|

---

JP5099684B2|2007-08-06|2012-12-19|ボッシュ株式会社|Exhaust purification device|

---

GB2452249A|2007-08-17|2009-03-04|Emcon Technologies Germany|An exhaust system|

---

US20100186382A1|2009-01-26|2010-07-29|Caterpillar Inc.|Emissions system mounting device with reductant mixing|

---

DE102010014037A1|2009-04-02|2010-11-04|Cummins Filtration IP, Inc., Minneapolis|Reducing agent i.e. urea, decomposition system, has reducing agent injector coupled with exhaust chamber, where reducing agent injector is fixed in reducing agent injection connection part with exhaust gas in exhaust chamber|

---

EP3267005B1|2010-06-22|2020-12-09|Donaldson Company, Inc.|Exhaust aftertreatment device|

---

US20120151902A1|2010-12-16|2012-06-21|Caterpillar Inc.|Biased reductant mixer|

---

US8776509B2|2011-03-09|2014-07-15|Tenneco Automotive Operating Company Inc.|Tri-flow exhaust treatment device with reductant mixing tube|

---

FR2972764B1|2011-03-16|2013-03-29|Peugeot Citroen Automobiles Sa|COMPRESSOR ASSEMBLY EXHAUST GAS POST-TREATMENT BODY WITH SCR REDUCER MIXER|

---

FR2974595B1|2011-04-26|2015-05-29|Peugeot Citroen Automobiles Sa|BENDING ENVELOPE OF AN EXHAUST GAS POST-TREATMENT ASSEMBLY OF A COMBUSTION ENGINE HAVING TWO HALF-SHELLS|

---

FR2977912B1|2011-07-11|2013-07-05|Peugeot Citroen Automobiles Sa|EXHAUST GAS POST-TREATMENT ASSEMBLY OF A COMBUSTION ENGINE COMPRISING AN IMPACT-REDUCING AGENT DISTRIBUTOR|

---

WO2014112067A1|2013-01-17|2014-07-24|株式会社小松製作所|Reducing agent aqueous solution mixing device and exhaust gas aftertreatment device provided with same|

---

US9021794B2|2013-03-15|2015-05-05|Cummins Intellectual Property, Inc.|Decomposition chamber|

---

GB2512896B|2013-04-10|2016-05-25|Perkins Engines Co Ltd|A mixer module and an emissions cleaning module|

---

CN106715853B|2014-09-15|2019-07-05|天纳克汽车经营有限公司|It is vented electric hybrid module|

---

US9334781B2|2013-05-07|2016-05-10|Tenneco Automotive Operating Company Inc.|Vertical ultrasonic decomposition pipe|

---

US20150308316A1|2014-04-29|2015-10-29|GM Global Technology Operations LLC|Integrated mixing system for exhaust aftertreatment system|

---

GB2528764B|2014-06-13|2020-07-29|Cummins Emission Solutions Inc|In-line decomposition reactor pipe with exhaust assist|

---

AT516102B1|2014-08-14|2017-09-15|MAN Truck & Bus Österreich AG|Exhaust gas purification device for a vehicle, in particular for a commercial vehicle|

---

US10215075B2|2014-10-24|2019-02-26|Faurecia Emissions Control Technologies, Usa, Llc|Modular mixer inlet and mixer assembly to provide for compact mixer|

---

DE102015103425B3|2015-03-09|2016-05-19|Tenneco Gmbh|mixing device|

---

CN204783185U|2015-04-21|2015-11-18|康明斯排放处理有限公司|Mobile device of entry and system|

---

US9816421B2|2015-06-10|2017-11-14|Cummins Emission Solutions Inc.|Aftertreatment exhaust separator and/or deflector|

---

CN107035480B|2016-02-03|2019-08-09|天纳克（苏州）排放系统有限公司|Mixing chamber component|

---

US10024217B1|2017-08-22|2018-07-17|Cummins Emission Solutions Inc.|Reductant decomposition reactor chamber|US10024217B1|2017-08-22|2018-07-17|Cummins Emission Solutions Inc.|Reductant decomposition reactor chamber|

---

WO2020009713A1|2018-07-06|2020-01-09|Cummins Emission Solutions Inc.|Decomposition chamber for aftertreatment systems|

---

NL2021516B1|2018-08-30|2020-04-24|Daf Trucks Nv|An arrangement for introducing a liquid medium into exhaust gases|

---

IT201900001933A1|2019-02-11|2020-08-11|Cnh Ind Italia Spa|IMPROVED EXHAUST GAS TREATMENT SYSTEM FOR A VEHICLE|

---

CN111561378A|2019-02-14|2020-08-21|迪耐斯集团|U type exhaust gas mixing device|

---

NL2022889B1|2019-04-08|2020-10-15|Daf Trucks Nv|An arrangement for introducing a liquid medium into exhaust gases|

---

CN112282900A|2019-07-25|2021-01-29|康明斯排放处理公司|Exhaust gas aftertreatment system|

---

USD907552S1|2019-10-28|2021-01-12|Cummins Emission Solutions Inc.|Baffle for a reductant delivery system|

---

WO2021112826A1|2019-12-03|2021-06-10|Cummins Emission Solutions Inc.|Reductant delivery system for exhaust gas aftertreatment system|

---

CN111764988B|2020-06-29|2021-11-12|东风商用车有限公司|Aftertreatment encapsulation SCR blender unit|

---

FR3113697A1|2020-09-01|2022-03-04|Faurecia Systemes D'echappement|Exhaust gas reducer mixer|

法律状态:
2021-10-05| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|

---

2021-11-23| B350| Update of information on the portal [chapter 15.35 patent gazette]|

---

2022-03-03| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

优先权:

---

申请号 | 申请日 | 专利标题

---

US15/683,315|2017-08-22|

---

US15/683,315|US10024217B1|2017-08-22|2017-08-22|Reductant decomposition reactor chamber|

---

PCT/US2018/026826|WO2019040127A1|2017-08-22|2018-04-10|Reductant decomposition reactor chamber|

---