• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an internal combustion engine (1) with a plurality of cylinders (Z), with an inlet system (2) with a compressor (5), preferably driven by an exhaust gas turbine (4), and an exhaust system (3) with at least one exhaust gas recirculation system (13) an exhaust gas recirculation line (13a) for the return of gas from the exhaust system (3) in the intake system (2), wherein gas with the aid of a first compressed air tank (10) having compressed air system (14) via a Venturieinrichtung (12) is traceable, wherein the compressed air tank (10) via at least one separate removal valve (20) exhibiting removal system (27) with at least one working space (19) of a cylinder (Z) is flow connected, each of which withdrawal valve (20) empties a discharge line (21), and the withdrawal lines (21 ) of different cylinders (Z) are interconnected. In order to be able to reduce nitrogen oxide emissions in the simplest possible and energy-saving manner, it is provided that at least one bleed valve (20) is formed by an engine brake valve and the bleed lines (21) open into a collecting volume (22) which is flow-connected to the compressed air tank (10) and under pressure Stagnant gas, at least during an engine braking operation of the internal combustion engine (1) from at least one working space (19) in the compressed air tank (10) can be flowed over.
    公开号:AT511070A4
    申请号:T765/2011
    申请日:2011-05-26
    公开日:2012-09-15
    发明作者:Robert Roithinger；Michael Dipl Ing Glensvig；Boris Willneff
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    • · · «** · · * * * • · ·« ** · · * * * 1: 56138
    The invention relates to an internal combustion engine having a plurality of cylinders, an intake system having a compressor and an exhaust system, preferably driven by an exhaust gas turbine, with an exhaust gas recirculation system having at least one exhaust gas recirculation line for returning gas from the exhaust system to the intake system, gas assisting a first compressed air tank having compressed air system via a Venturieinrichtung is traceable, wherein the first compressed air tank via at least one separate removal valve exhibiting removal system with at least one working space of a cylinder is strömungsverbindbar, wherein each withdrawal valve emanates a discharge line, and the extraction lines of different cylinders are interconnected. The invention further relates to a method for operating an internal combustion engine having a plurality of cylinders, comprising an intake system with a preferably driven by an exhaust gas turbine compressor and an exhaust system, with an exhaust gas recirculation system with at least one exhaust gas recirculation line for returning gas from the exhaust system in the intake system, wherein gas Support of a first compressed air tank having compressed air system is recycled via a Venturieinrichtung, wherein pressurized gas is passed via at least one separate removal valve from a working space of at least one cylinder in the compressed air tank.
    From DE 43 19 380 C2 an internal combustion engine with an exhaust gas turbocharger is known, which has an exhaust gas recirculation line, which opens into the inlet system in the region of a Venturi device. Due to the venturi device, sufficient exhaust gas recirculation quantities can be achieved even if the pressure difference between the inlet and outlet system is positive.
    From WO 08/022769 Al an internal combustion engine with an intake system and an exhaust system and an exhaust gas recirculation line for recirculation of exhaust gases is known. In the inlet system opens a compressed air line, which is provided with a flow control device. Upstream of the mouth of the compressed air line, a throttle and a compressor are arranged in the intake system. The throttle valve is actuated synchronously with a flow control device in the compressed air line. By injecting compressed air into the intake system when the throttle is closed, the speed of the
    Compressor impeller can be increased very quickly and thus a faster torque build-up can be realized. The disadvantage is that there is a short-term positive pressure difference between the intake system and the exhaust system, during which no exhaust gas recirculation takes place. This has the disadvantage that a peak level of nitrogen oxide emissions occurs.
    WO 98/32964 A1 describes an exhaust gas recirculation system for an internal combustion engine with a Coanda effect utilizing air jet pump, wherein compressed air is supplied to the exhaust gas flow path in front of a Venturi device. The exhaust flowpath enters the intake system via an EGR / air mixer. The Venturi device is arranged upstream of an EGR cooler. The disadvantage is that a large part of the cylinder charge must pass through the EGR cooler and the exhaust gas / air mixer during the compressed air injection. The flow area of the EGR cooler, EGR conduit and exhaust gas / air mixer must be relatively large, which adversely affects the EGR / air mixture, the EGR cooling capacity and the dimensions of the exhaust gas recirculation system. For the provision of compressed air is its own compressed air supply device such. B. a mechanically or electrically driven compressor required.
    From the publications EP 1 836 381 Al, DE 101 444 71 Al and DE 10 333 480 Al internal combustion engines are known, each with a separate brake valve per cylinder, leading from the opening into the cylinder brake valve lines to a common for all cylinder sump, which over a control valve is connectable to the exhaust manifold upstream of an exhaust turbine.
    From FR 2 836 181 Al a vehicle operated by an internal combustion engine is known, wherein at least one cylinder is operated as a compressor during engine braking operation. In this case, an outlet valve is opened during the compression stroke and the outlet channel is connected via a control valve with a compressed air tank. The stored compressed air is fed into the intake manifold to improve the performance of the internal combustion engine.
    From AT 507 481 A1 an internal combustion engine with an intake system with a compressor driven by an exhaust gas turbine and an exhaust system is known. For recirculation of exhaust gas from the exhaust system to the intake system * * ι * MM »« * · · «9 ***** *« * «* 3 ********* • a *« · * · · · An exhaust gas recirculation system is provided. The exhaust gas is thereby recycled with the aid of a compressed air tank having compressed air system via a Venturieinrichtung. The compressed air tank is connected via extraction lines and bleed valves with the working spaces of the cylinder in flow communication. It is provided that at least one cylinder is deactivated in at least one engine operating region and the compressed air tank is flow-connected via at least one bleed valve with the working space of the deactivated cylinder. The deactivated cylinder thus operates as a compressor and delivers compressed air into the compressed air tank.
    From DE 10 2005 001 757 Al an internal combustion engine with a cylinder associated gas pressure vessel is known. The cylinders of the internal combustion engine are each connected via an adjustable brake valve with the common gas pressure vessel, which communicates via an outflow line and a discharge valve with the exhaust line of the internal combustion engine. The gas pressure vessel is further connected via a recirculation line with a check valve arranged therein with the intake tract of the internal combustion engine.
    Furthermore, from DE 11 2004 000 310 B3 an engine brake system of a multi-cylinder internal combustion engine with at least one additional valve for each cylinder is known, which valves are connected via channels with a tubular pressure vessel. The pressure vessel has a cooling device for cooling the gas quantities exchanged between individual cylinders.
    The object of the invention is to reduce the emissions bet an internal combustion engine.
    According to the invention this is achieved in that at least one bleed valve is formed by an engine brake valve and open the discharge lines in a flow-connectable with the compressed air tank collecting volume and pressurized gas, at least during an engine braking operation of the internal combustion engine from at least one working space in the compressed air tank can be overflowed. During engine braking operation, pressurized exhaust gas or air from the working spaces of the cylinders is guided into the collecting volume via the removal valves and the withdrawal lines formed by engine brake valves. The * ··· «« t · · II * * «« * a · «I * * ·« · 4::: »* ·« · · «·« h * + · «« «« «1« » * * pressurized gas is also passed through the overflow valve in the compressed air tank and stored here. If necessary, the exhaust gas stored in the compressed air tank is available for compressed air-assisted exhaust gas recirculation.
    Preferably, it is provided that between the manifold and the compressed air tank, a preferably formed by a check valve overflow valve is arranged, and it is particularly advantageous if the pressurized gas is cooled before being introduced into the air pressure vessel. For cooling the gas, a cooling device can be arranged in the region of the collecting volume and / or between the collecting volume and the compressed-air container. By the cooling device, the degree of fulfillment of the compressed air tank can be increased.
    Thus, the throttled during a braking process exhaust gas volumes are collected in the collecting volume and cooled and stored in the compressed air tank. Thus, pressurized exhaust gas can be easily stored. An electrically or mechanically operated compressor is thus not required for the compressed air-assisted exhaust gas recirculation. A for other purposes - for example, for a compressed air assisted brake system - necessary in the vehicle compressor does not need to be designed for greater drive power. Similarly, a separate compressor for the compressed air-assisted exhaust gas recirculation omitted. The storage of the pressurized exhaust gas allows a particularly simple and energetically favorable charging of the compressed air system. The compressed air reservoir is connected via a compressed air line with the venturi flow and thus enables exhaust gas recirculation even with unfavorable differential pressure conditions between the exhaust system and charge air line.
    Thus, an exhaust gas recirculation can be carried out in the simplest and energy-saving manner, even under unfavorable pressure conditions, and thus the emissions, in particular the nitrogen oxide emissions, the Berennkraftmaschine be substantially reduced.
    The invention will be explained in more detail below with reference to FIGS. 5 5 t * * · · i d 4 «< 4 * * * * * * 4 ** t * - * * * * »» * * «> · ** · «« 4 «* ·
    1 shows an internal combustion engine according to the invention in a first embodiment, and FIG. 2 shows an internal combustion engine according to the invention in a second embodiment.
    1 shows an internal combustion engine 1 with four cylinders Z with an intake system 2 and an exhaust system 3. In the exhaust system 3, the exhaust gas turbine 4 and in the intake system 2 of the compressor 5 of an exhaust gas turbocharger is arranged. For the return of exhaust gas from the exhaust system 3 in the intake system 2, an exhaust gas recirculation valve 6 and an exhaust gas recirculation cooler 7 is seconded in the exhaust gas recirculation line 13a of the exhaust gas recirculation system 13. Downstream of the compressor 5, there is a charge air cooler 8 and a throttle valve 9 in the charge air line 2 a leading to an intake manifold 2 b.
    In order to achieve a rapid response of the compressor 5 of the exhaust gas turbocharger, a compressed air system 14 is provided with an opening into the intake system 2 compressed air line 15, wherein the compressed air system 14 further comprises a compressed air tank 10 and a compressed air valve 11.
    In the exhaust gas flow path 16, a Venturieinrichtung 12 is arranged, wherein the compressed air line 15 opens upstream of the venturi 12 in the first exhaust gas flow path 16. As a result, sufficient exhaust gas can be recirculated from the exhaust system 3 into the intake system 2 even if the pressure difference between the intake system 2 and the exhaust system 3 is unfavorable.
    For filling the compressed air tank 10, a removal system 27 is provided, wherein the removal system 27 in addition to intake and exhaust valves 17, 18 per cylinder Z each one into the combustion chamber 19 opening discharge valve 20 which controls a discharge line 21. The extraction lines 21 of all cylinders open into a common collection volume 22, which collection volume 22 is flow connected via a connecting line 23 to the compressed air tank 10, wherein in the connecting line 23 designed as a check valve overflow valve 24 is arranged. In or around the collecting volume 22, a cooling device 25 is arranged. Alternatively or additionally, a cooling device 26 may be arranged in the connecting line 23. I t ·· *, * * · ΐ * * «t *« «I ((it I * · 6 ·· **** ·« · »· * * ·« «·» | k «* * * * I t «» · w ·
    2 shows an internal combustion engine 1 with six cylinders Z whose intake ports 2c communicate with an intake manifold 2b of an intake system 2, which starts with an air filter via the compressor 5 of the turbocharger TC and via the charge air cooler 8 with charge air arranged in the charge air line 2a is supplied. The exhaust valves 18 of the internal combustion engine 1 open via exhaust channels 3a in the exhaust system 3, wherein the exhaust gases are conducted in a conventional manner via the exhaust gas turbine 4 of the turbocharger TC and exit via a muffler 27.
    As in FIG. 1, the internal combustion engine 1 of FIG. 2 also has an exhaust gas recirculation system and a compressed air system including a venturi for compressed air-assisted recirculation of exhaust gas from the exhaust system into the intake system, which are not illustrated in FIG. 2.
    From the compressed air system are shown in Fig. 2, only the combustion chambers 19 of the cylinder Z opening extraction valves 20, sampling lines 21, collecting volume 22 and the not further apparent compressed air tank leading connecting line 23 together with overflow valve 24 and cooling device 26. They are sampling valves 20, the sampling lines 21 and the collecting volume 22 also part of the engine braking device of the internal combustion engine, the extraction valves 20 are thus formed by the engine brake valves. About the collecting volume 22, a gas exchange between the individual cylinders Z at relatively high pressure level is possible for the engine braking function.
    During engine braking operation of the internal combustion engine 1, the brake or take-off valves 20 are actuated once or several times per operating cycle of the engine, for example two brake strokes per work cycle, wherein the first brake stroke takes place near top dead center of the high-pressure cycle. During a braking stroke, highly compressed air exits from one of the cylinders Z into the collecting volume 22 (braking rail). As a result, on the one hand the collecting volume 22 is filled with compressed air (up to about 20 bar operating pressure), on the other hand reduces the expansion of the cylinder Z, creating braking power. If the pressure in the compressed air tank 10 is less than in the collecting volume 22, then the compressed air flows from the collecting volume 22 into the compressed air tank 10. I * * * * h * »« »« * $ * · 4 I »> t * * * * «7« i I «« * «* * * ·
    I * t t 4 I I · I I «I * ·« ···
    «· 4 *« * ♦ * «« «« I
    Shortly after closing the inlet valve, the extraction valve 20 can be opened again, whereby (residual) compressed air flows from the collecting volume 22 into the combustion chamber 19. As a result of the second brake stroke of the cylinder pressure increases at the beginning of the compression phase of the compression stroke to the pressure level of the collection volume 22. This increases the applied compression work and thus in turn the braking performance of the engine.
    权利要求:
    Claims (11)
    [1]
    • * «k * r i. »*: Ι * · · ri 8 i» < y * * t »» * # * k - * * * · · * * * > > > 1. An internal combustion engine (1) having a plurality of cylinders (Z), an intake system (2) having a compressor (5), preferably driven by an exhaust gas turbine (4), and an exhaust system (3) ), comprising an exhaust gas recirculation system (13) having at least one exhaust gas recirculation line (13a) for returning gas from the exhaust system (3) to the intake system (2), wherein gas is supplied via a compressed air system (14) having a compressed air system (14) having a first compressed air reservoir (10) Venturi device (12) is traceable, wherein the compressed air tank (10) via at least one separate removal valve (20) exhibiting removal system (27) with at least one working space (19) of a cylinder (Z) is flow connected, each of which withdrawal valve (20) is a withdrawal line (21), and the extraction lines (21) of different cylinders (Z) are interconnected, characterized in that at least one bleed valve (20) by a Motorbrem at least during an engine braking operation of the internal combustion engine (1) from at least one working space (19) into the compressed-air reservoir (10). can be overflowed.
    [2]
    2. Internal combustion engine (1) according to claim 1, characterized in that between the collecting volume (22) and the compressed air tank (10) at least one preferably formed by a check valve overflow valve (24) is arranged.
    [3]
    3. Internal combustion engine (1) according to claim 1 or 2, characterized in that the removal system (27) has at least one cooling device (25, 26)).
    [4]
    4. internal combustion engine (1) according to one of claims 1 to 3, characterized in that at least one cooling device (25) arranged in the region of the collecting volume (22), preferably in the collecting volume (22) is integrated. t * «# * fc '* t» V »•» # »1 *» # * »« »» »» «* * ♦ ψ * * t · *« * 4 * * ·. - ·
    [5]
    5. internal combustion engine (1) according to one of claims 1 to 4, characterized in that at least one cooling device (26) between the collecting volume (22) and the compressed air tank (10) is arranged.
    [6]
    6. Internal combustion engine according to one of claims 1 to 5, characterized in that the compressed air tank (10) via a compressed air line (15) with the Venturi device (12) is fluidly connected.
    [7]
    7. Method for operating an internal combustion engine (1) with a plurality of cylinders (Z), with an inlet system (2) with a compressor (5), preferably driven by an exhaust gas turbine (4), and an exhaust system (3) with an exhaust gas recirculation system (13) with at least one exhaust gas recirculation line (13a) for recirculating gas from the exhaust system (3) into the intake system (2), wherein gas is recirculated via a venturi (12) with the aid of a compressed air system (14) having a first compressed air tank (10) pressurized gas is passed via at least one separate removal valve (20) from a working space (19) of at least one cylinder (Z) in the compressed air tank (10), characterized in that the pressurized gas at least during at least one engine braking operation of the internal combustion engine (1) from at least one working space (19) in the compressed air tank (10) is passed.
    [8]
    8. The method according to claim 7, characterized in that in the engine braking operation, the removal valve (20) is opened at least once, preferably twice per working cycle.
    [9]
    9. The method according to claim 8, characterized in that the removal valve (20) is opened in the region of the top dead center of at least one compression stroke.
    [10]
    10. The method according to claim 8 or 9, characterized in that the removal valve (20) in the region of the bottom dead center before the compression stroke, preferably at the end of the inlet phase is opened. 10 * * * 1
    [11]
    11. The method according to any one of claims 7 to 10, characterized in that the pressurized gas removed from the working space is cooled before or during the overflow into the compressed air tank (10). 2011 05 26 Fu / St-inCS «ΐ | ·: A 'n £ ··, > : 1 v (* · $ | IT W a «* a.i;



    I ΜΛΓΗΠΙίυΐίΤΓΗΤ Aktcnz .: 2 Kia Method for operating an internal combustion engine (1) with a plurality of cylinders (Z), with an intake system (2) having a compressor (5), preferably driven by an exhaust gas turbine (4), and an exhaust system ( 3), comprising an exhaust gas recirculation system (13) having at least one exhaust gas recirculation line (13a) for returning gas from the exhaust system (3) to the intake system (2), wherein gas is recirculated with the assistance of a compressed air system (14) having a first compressed air tank (10) wherein pressurized gas is passed via at least one separate bleed valve (20) from a working space (19) of at least one cylinder (Z) into the pressure air container (10), the pressurized gas being at least during at least one engine braking operation of the internal combustion engine ( 1) from at least one working space (19) in the Druckiuftbehälter (10) is passed, wherein in the engine braking operation, the removal valve (20) at least once, v is preferably opened twice per working cycle, characterized in that the removal valve (20) is opened in the region of top dead center of at least one compression stroke and / or in the region of bottom dead center before the compression stroke, preferably at the end of the intake phase, wherein the gas via a Venturieinrichtung (12) is returned. 2. The method according to claim 1, characterized in that the pressurized gas taken from the working space is cooled before or during the overflow into the Druckiuftbehälter (10). 3. internal combustion engine (1) with a plurality of cylinders (Z), for carrying out the method according to claim 1 or 2, with an inlet system (2) with a preferably by an exhaust gas turbine (4) driven compressor (5) and an exhaust system (3), with an exhaust gas recirculation system (13) having at least one exhaust gas recirculation line (13a) for returning gas from the exhaust system (3) to the intake system (2), wherein gas is traceable with the assistance of a compressed air system (14) having a first compressed air tank (10) the Druckiuftbehälter (10) via at least one separate removal valve (20) exhibiting removal system (27) with at least one working space (19) of a cylinder (Z) is flow connected, each of which withdrawal valve (20) emanates a discharge line (21), and the withdrawal lines (21) of different cylinders (Z) are interconnected, wherein at least one bleed valve (20) is formed by an engine brake valve and the extraction lines (21) into a pressure-air container (10) flow-connectable collecting volume (22) open and pressurized gas at least during an engine braking operation of the internal combustion engine (1) of 2 at least one working space (19) in the Drucklufcbeiiälter (10) ÜDerströmbar, characterized in that the gas is traceable via a venturi device (12), wherein the compressed air container (10) is flow-connected to the venturi device (12) via a compressed air line (15). 4. Internal combustion engine (1) according to claim 3, characterized in that between the Sammeivolumen (22) and the compressed air tank (10) at least one preferably formed by a check valve overflow valve (24) is arranged. 5. Internal combustion engine (1) according to claim 3 or 4, characterized in that the removal system (27) has at least one cooling device (25, 26)). 6. Internal combustion engine (1) according to one of claims 3 to 5, characterized in that at least one cooling device (25) arranged in the region of Sammelvoiumens (22), preferably in the collecting volume (22) is integrated. 7. Internal combustion engine (1) according to one of claims 3 to 6, characterized in that at least one cooling device (26) between the Sammeivolumen (22) and the compressed air tank (10) is arranged. / '. y 2011 12 22 Fu / Bt Äriistj Vienna, t <rl * Hlw * r fei., ί + rj n fü ί «· 4 0 h m a; ** * 54 I jvi 4ru f i I ΓΙΠ1Ί
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE102012103832A1|2012-11-29|
    AT511070B1|2012-09-15|
    引用文献:
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    DE4319380C2|1992-06-12|1998-12-17|Avl Verbrennungskraft Messtech|Internal combustion engine with an exhaust gas turbocharger|
    WO1998032964A1|1997-01-27|1998-07-30|Alliedsignal Inc.|Exhaust gas recirculation system employing a fluidic pump|
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    DE10144471A1|2000-09-12|2002-03-28|Avl List Gmbh|Multi-cylinder engine with engine braking device has tubular pressure container with pressure regulating valve in which channels from brake valve come out|
    FR2836181A1|2002-02-15|2003-08-22|Peugeot Citroen Automobiles Sa|Operating system for vehicle internal combustion engine, comprises use of one or more cylinders as compressors during light load such that a reservoir is charged with compressed gas for later use|
    DE10333480A1|2002-07-26|2004-02-26|Avl List Gmbh|Operating process for a multi cylinder combustion engine uses some cylinders as compressors and feeds compressed air into other firing cylinders during the start phase|
    DE112004000310B3|2003-02-20|2008-01-17|Avl List Gmbh|Engine braking system of a multi-cylinder internal combustion engine with cooled intermediate pipe for gas exchange between cylinders during engine braking|
    DE102005001757A1|2005-01-14|2006-07-20|Daimlerchrysler Ag|Internal combustion engine with a cylinder associated with the gas pressure vessel and method for operating the internal combustion engine|
    EP1836381A1|2005-01-14|2007-09-26|DaimlerChrysler AG|Internal combustion engine comprising a gas pressure container which is associated with the cylinders and method for the operation thereof|
    WO2008022769A1|2006-08-22|2008-02-28|Knorr-Bremse Systeme für Nutzfahrzeuge GmbH|Device and method for supplying fresh air to a turbocharged reciprocating-piston internal combustion engine|
    AT507481A1|2009-10-15|2010-05-15|Avl List Gmbh|Internal-combustion engine has inlet system with compressor propelled by exhaust-gas turbine and outlet system with exhaust re-conducting system|
    US9382838B2|2012-05-17|2016-07-05|Ford Global Technologies, Llc|Boost reservoir and throttle coordination|
    GB2520838A|2014-11-17|2015-06-03|Daimler Ag|Power unit for a vehicle|
    ES2571627B1|2014-11-26|2017-03-09|Denersa, S.L.|Compound motor|
    EP3184790A1|2015-12-21|2017-06-28|Robert Bosch Gmbh|Internal combustion engine and method for operating such engine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA765/2011A|AT511070B1|2011-05-26|2011-05-26|INTERNAL COMBUSTION ENGINE WITH SEVERAL CYLINDERS|ATA765/2011A| AT511070B1|2011-05-26|2011-05-26|INTERNAL COMBUSTION ENGINE WITH SEVERAL CYLINDERS|
    DE102012103832A| DE102012103832A1|2011-05-26|2012-05-02|Internal combustion engine of vehicle, has compressed-air reservoir that is connected to discharge valve through withdrawal system formed by engine brake valve|
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