• 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:
    A gearbox injection unit (10), which comprises a fluid injector (12), a tube member (42), a filter (204), a filter calibration tube (52), a valve assembly, a the position of the filter calibration tube (52) in the tube member (42) controlling an opening force of the valve assembly and a volume reduction member (208).
    公开号:FR3071011A1
    申请号:FR1871037
    申请日:2018-09-13
    公开日:2019-03-15
    发明作者:Stephen C. Bugos；Josh Lee Hatfield；Keith Aaron Shaw
    申请人:Continental Automotive Systems Inc；
    IPC主号:
    专利说明:

    Technical Field [0001] The present invention relates, in general, to a fluid injector of a reducer injection unit (UIR) and, in particular, to a robust fluid injector of the UIR for non-purge applications.
    Prior art [0002] Emission regulations in Europe and in
    North America is driving the implementation of new exhaust aftertreatment systems, especially for lean combustion technologies, such as compression ignition (diesel) engines and spark ignition spark ignition engines (usually direct injection), which operate in poor and ultra-poor conditions. Lean combustion engines have levels of nitrogen oxide (NOx) emissions, which are difficult to deal with in oxygen-rich exhaust environments characteristic of lean combustion. Exhaust post-treatment technologies are commonly developed in order to treat NOx under these conditions.
    One of these technologies includes a catalyst,
    1'amrnoni ac (N H 3) on the nitrogen oxides (NOx) exhaust to produce calls to handle this in its pure form in usual.
    with these diesel (FED) and / or aqueous urea liquid systems, typically at a
    32% urea (CO (NH2) 2)
    We denote hot injector, and before
    AUS-32 and it is a normally known by the use is transformed into ammonia the is sent to a hot exhaust current e is transformed into ammonia in the exhaust after having undergone thermolysis, thermal, ammonia and present in it exhaust and is transformed into ammonia and cardboard dioxide (CO2), the ammonia from thermolysis and hydrolysis then undergoing a catalyzed reaction with nitrogen oxides, as described above.
    AUS-32, or AdBlue, has a freezing point of
    -11 ° C and you can expect the system to freeze in cold climates. As these fluids are aqueous, an increase in volume occurs after the transition to the solid state during freezing. The expanding solid can apply significant forces to any enclosed volume, such as an injector. This expansion can damage the injection unit and that is why there are different RCS strategies to cope with the expansion of the reducer.
    purge systems and purges. In purge RCS systems, purge the UIR when the.
    vehicle engine stems of rest in 'UIR during the lifetime of a normal operation. of normal RCS of purged years, the injector operates at temperatures, which are of the reducer, so that liquid.
    1'état
    The vehicle engine is
    stopped in the RCS system without purge, 1'inj ec 1 'UIR remains filled with reducing agent, what returns 1 ' susceptible UIR injector to be damaged by an expansion of the reducer
    under freezing conditions.
    Summary of the invention.
    Embodiments given by way of example combine the drawbacks of the existing UIR fluid injectors and provide an improved fluid injector for RCS systems without purging in which the harmful effects of UIR are finding at temperatures that are lower than the freezing point of the reducer, are decreased. According to an exemplary embodiment, a UIR comprises a fluid injector having a fluid inlet, disposed at a first end of the fluid injector to receive a reducer, and a fluid outlet disposed at a second fluid 1'injecteur end for discharging the reducing agent, 1'injecteur fluid defining a fluid path for the gear unit from the fluid inlet to the fluid outlet, May 1st fluid injector including a tube member having one end disposed at or near the fluid inlet of the fluid injector, the tube member being configured to pass from the reducer, along the fluid path; a filter, arranged in the tube element, near the inlet of the fluid inlet of the fluid injector; a filter calibration tube, arranged in the tube element, downstream of the filter, compared
    has a direction of flow of the gear unit in the path of fluid, from the entrance of fluid to the exit of fluid of the injector ί fluid, the tube d e calibration of filter having a first time
    end portion adjacent to the filter and a second end, and further comprising a bore, defined in an axial direction, in the calibration tube. filter, the bore defining at least part of the fluid path in the fluid injector; an actuator unit, disposed in the fluid injector downstream of the filter calibration tube, the actuator unit cooperating with the second end of the filter calibration tube; a valve assembly, operatively coupled to the actuator unit, a position of the filter calibration tube in the tube element controlling, at least in part, an opposing force of opening of the valve assembly and a volume reduction element having a bore through which the filter calibration tube passes,
    .1 element of volume reduction occupant a space in be a s. outdoor arface of the tube of calibration of filtered and a surface i: nland of 1'élément of tube, in which the filtered, the tube of callus ibrage filter and 1 ! element of reduction of volume form a compos ant unitai _re
    of subassembly of the fluid injector.
    In one embodiment given by way of example, the volume reduction element is made of a compressible material, the compressible material being one of a rubber composition and a closed cell foam.
    embodiment given by way of example, the volume reduction element comprises an side wall, the side wall of vorume reduction a direction in one of [0009]
    The fluid injector may further comprise a cap member, comprising a side wall defining an interior space in which the filter is disposed, the side wall being in contact with the first end of the filter calibration tube. The first end portion of the filter calibration tube is disposed in the interior of the cap member. The first end part of the filter calibration tube is fixed to the side wall of the cap element, so that the filter calibration tube, the cap element, the volume reduction element and the filter form a unitary sub-assembly component of the fluid injector.
    The actuator unit may comprise a pole piece, arranged in a fixed position in the fluid injector and comprising a bore defined axially in the pole piece, a frame movably positioned in the injector. fluid and comprising, a pocket, a coil disposed near the pole piece and the frame and a spring arranged, at least in part, in the pocket of the frame, the filter calibration tube being arranged in the bore of the pole piece, so that the second end of the filter calibration tube is in contact with the spring, and the spring moves the armature away from the pole piece, in the absence of a passing current, in the coil, so as to put the valve assembly in a closed position to prevent the reducer from passing into the fluid outlet. The filter calibration tube comprises a second part, which extends axially from the first end part of the filter calibration tube, and a third part, disposed between the second part and the second end of the calibration tube. filter, the volume reduction element being arranged around the second part, the third part being arranged in the bore of the pole piece and one end, downstream of the volume reduction element, being close to one end upstream of the pole piece, relative to the direction of flow of the reducer in the fluid path.
    The filter calibration tube (52) comprises a second part, which extends axially. from the first end part of the filter calibration tube, and a third part, disposed between the second part and the second end of the filter calibration tube, the volume reduction element being arranged around the second part, the third part being disposed in the bore of the pole piece and one end, downstream of the volume reduction element, being near an end upstream of the pole piece, relative to the. flow of the reducer in the fluid path.
    [0012]
    An outside diameter of the second part of the filter calibration tube can be larger than an outside diameter of its third part In another embodiment, for example, the fluid injector of the UIR has a fluid inlet disposed at a first end and configured to receive a fluid, and a fluid outlet disposed at a second end of a fluid injector for discharging the fluid, the fluid injector defining a fluid path from the fluid inlet at the fluid outlet. A tube member has one end disposed at or near the fluid inlet of the fluid injector, the tube member being configured to pass fluid along the fluid path. A filter is disposed in the tube member near the fluid inlet of the fluid injector. A filter calibration tube is arranged in the tube element downstream of the filter, relative to the direction of flow of the fluid in the fluid path, going from the fluid inlet to the fluid outlet of the fluid injector. The filter calibration tube has a first end portion adjacent to the filter, a second end and a bore defined in an axial direction in the filter calibration tube, the bore defining at least a portion of the fluid path in the fluid injector.
    A unit for filter calibration injector, cooperating with the calibration tube of the actuator coupled together, actuator, a position of the calibration tube of the tube element regulating an antagonistic force of opening of the valve assembly.
    • r 8 J.J of filter comprises, in one a side wall which the filter has. In u:
    embodiment as
    For example, the side wall is in contact and is fixed at the first end of the tube of calibration of filter, so at this than 1'élément of cap, filter and the tube of calibration of filter form a compc being united .than
    of subassembly of the fluid injector.
    Brief description of the drawings [0014] Facets of the invention will be explained in detail below, with reference to an embodiment given by way of example, in conjunction with the drawings in which:
    Figure 1 [2] Figure 2 [0017] Figure 3 is a side sectional view of a UIR for an RCS system without bleeding according to an embodiment given by way of example;
    is a side view in section of a fluid injector of the UIR of Figure 1;
    is an enlarged sectional view of the inlet part of the fluid injector of the UIR of Figure 1 according to an embodiment given by way of example;
    Figure 4 is an exploded perspective view of elements of the fluid injector of the UIR [0019] Figure 5
    of figure 1 next a way of achievement given as example; is a view e: n cut see you
    Figure 6 [0021] Figure 7 [0022] Figure 8 [0023] Figure 9 large scale of the outlet portion of the fluid injector of the UIR of Figure 1 according to a given embodiment by way of example f;
    is an enlarged sectional view of the inlet portion of the fluid injector of the UIR of Figure 1 according to an embodiment given by way of example;
    is an exploded perspective view of elements of the fluid injector of Figure 6;
    is a sectional view of the elements of Figure 6;
    is a sectional view on a larger scale of the inlet portion of the fluid injector of the UIR of Figure 1 according to yet another embodiment given by way of example;
    Figure 10 is a view of the injector Figure 9;
    cutting of fluid elements from the
    Figure 11 is a perspective view of an element of the fluid injector of Figure 9;
    Figure 12 [0027] Figure 13 a sectional view of the
    entry part of 1 injector fluid the UIR of the figure Next 1 another fashion of production given as For example; is a view sectional items
    Figure 14 integrated of the fluid injector of Figure 12;
    FIG. 15 is a perspective view.
    burst of items of .1 inj ector of fluid of the Figure 13; is a view in Cup of the entrance part of the injury tor
    Figure 16 of the UIR fluid of the figure according to another embodiment by way of example;
    is a sectional view of integrated elements of Figure 15;
    Figure 17



    Description of embodiments The description which follows of the embodiments given by way of example is merely illustrative in nature and is not intended in any way to limit the invention, its application or its uses.
    Embodiments by way of example are aimed, in general, at a UIR for a RCS system without purge, in which the damaging effects of a reducing agent, an FDE and / or a solution of urea freezing in
    The injector of the UIR are reduced.
    D
    Figure without purge according to one embodiment
    The UIR 10 comprises an electromagnet fluid, indicated in a way by 12, a measurement function and provides the exhaust path in a fluid eur is thus constructed and arranged to be associated with exhaust upstream of a converter. (not shown) by selective catalytic reduction (RCS).
    L 5 fluid injector 12 can be a
    inj ector ofelectromagnet fuel working at 1 ' é1e ct r i cit é. As represented to the figures -Ί and 2, injector 12 of fluid includes a a ity actuator having a coil
    a route ae iiuiae and / or a solution The reducer, the FDE that the UIR 10 is in the vehicle path. sera and a movable frame 16. Elements of the injector 12 define for a reducer, an urea FDE in the injector 12. and / or the urea solution, configured to inject exhaust from an engine hereinafter referred to as a reducer '' for the sake of simplicity.
    The fluid injector 12 is disposed in a support 18 inside the UIR 10, as shown in Figure 1. An injector protection, indicated generally by 20, is formed of a protection Upper 20A and lower protection 20B, which surround the injector 12 and are connected to the support 18 by folding tabs of a flange 22 of the lower protection 20B on the folding features of the support 18 and the upper protection 20A . It follows that the protection 20 and the support 18 are fixed relative to the injector 12.
    An input cup structure of the UIR
    10, indicated generally by 24 in FIG. 1, comprises a cup 26 and a fluid supply tube 28 formed in one piece with the cup 26. The fluid supply tube 28 communicates with a source a reducer (not shown), which is sent into a fluid inlet 30 of the injector 12 for ejection from its fluid outlet 12 and into the exhaust stream of a vehicle engine (not shown) . The fluid inlet 30 of the injector 12 is in fluid communication with the fluid supply tube 28. The fluid outlet 32 communicates fluidly with an outlet 34 of an exhaust flange 36, which is directly coupled with one end of the lower protection 20B of the IRU 10.
    The injector 12 includes an injector body structure, in which the elements of the injector 12 are arranged. The injector body structure comprises a first part 38 of injector body, in which are arranged a coil 14 and a frame 16, and a part 40 of valve body, in which is disposed, at least in part, a injector valve assembly 12. The first part 38 of the injector body and the part 40 of the valve body are fixedly connected, directly or indirectly, to each other.
    Referring to Figures 1 to 3, a fluid injector comprises a tube element 42, which is arranged, at least in part, in the first part 38 of the injector body. The outer surface of the tube member 42 is in contact with the inner surface of the first injector body part. An open end of the element 42 is disposed in the cup 26 and is in fluid communication with the fluid supply tube 28. An O-ring 44 is placed in the cup 2 6 between a surface and the outer surface of
    1'élément tube near the open end of one fluid supply passes into the open end of the element 42 [0039] The actuator unit of the injector 12 of fluid further comprises , a pole piece 46, which is fixedly disposed in the first part 38 of the body of the injector. The coil 14 surrounds, at least in part, the pole piece 46 and the frame 16. The pole piece 46 is disposed upstream of the frame 16 in the injector 12. The pole piece 46 includes a central bore defined axially in it.
    The frame 16 comprises a U-shaped part, which defines a pocket, in which is arranged at least part of a spring 50. The spring 50, which is part of the actuator unit, repels the movable armature 16, so that the armature 16 is placed at a distance from the pole piece 46 when it does not pass current through the coil 14. The spring 50 extends partially in the central bore of the piece 46 polar. One end of the spring 50, which extends in the pole piece 46, is in contact with a tube 52 for adjusting the spring. The spring adjustment tube 52 is disposed, at least in part, in the central bore of the pole piece 46, upstream (relative to the direction of flow of the reducer in the injector 12) of the spring 50. tube 52 for adjusting the spring includes a bore defined axially therein. The through bore of the spring adjustment tube 52 partially defines the fluid path for the reducer in the fluid injector 12 and defines the only fluid path for the reducer in the pole piece 46. Because of its cooperation with the spring 50, the spring adjustment tube 52 is used to calibrate the dynamic flow of the reducer in the fluid injector 12.
    The frame 16 further comprises one or more channels 60 (Figures 1 and 2) defined in the frame 16 and going from an interior of the pocket to an end portion upstream of an element 58 of spindle. The channels 60 can be distributed equally around the frame 16. In an embodiment given by way of example, the frame 16 comprises a single channel, which is defined entirely around the base of the pocket formed by the wall. 16A from the pocket. The channel or channels 60 allows the reducer to pass from the pocket of the frame 16 to the space around the upstream end of the pin element 58.
    The door of the frame 16 and the channel (s) 60 define in part together the reducing fluid path of the fluid injector 12 and define the only part of the fluid path passing through or around the frame 16 this.
    Referring to Figures 1, 2 and 5, the assembly of the injector 12 comprises a seal element 54 and a seat 56. The seal element 54 is connected to a frame 16 by the element 58 spindle, which is mounted between the seal element 54 and the downstream end of the frame 16.
    The seal element 54, the pin element 58 and the frame 16 can be combined to form a frame assembly. When the coil 14 is energized, the coil 14 produces an electromagnetic force acting on the armature 16, which overcomes the force of the spring 50 and cause the armature 16 to move towards the pole piece 46, which, from a correspondingly, displaces the element 58 of the spindle, so as to raise the element 54 of the seat seal 56 and to stop the cooperation thereof, by moving the armature assembly towards an open position and allowing passing through the flange outlet 32 34 and into the vehicle engine. Lor reducer to pass in fluid towards the exhaust path outlet of the coil 14 is no longer energized, the electromagnetic force dissipates and the spring 50 acts on the armature
    16, so that the frame 16 moves away from the pole piece 46, which results in the fact that the seal element 54, cooperating sealingly with the seat 56, brings the assembly armature in a closed position. The armature assembly being in the closed position, the reducer is prevented from passing through the seat 56 and into the flange outlet 34 and from going into the exhaust path of the vehicle engine.
    As mentioned above, the UIR 10 forms part of an exhaust post-processing system of an RCS without purging. It follows that the reducer remains in the fluid injector 12 after the vehicle engine has been stopped. In certain embodiments given by way of example, the fluid injector 12 is configured so as to reduce the quantity of reducing agent in the fluid injector 12. In other words, the total volume of the fluid path for reducer in the fluid injector 12 is decreased. By having less space for reducer in the injector 12, the amount of reducer in the UIR 10, which can potentially freeze, is reduced, making the injector 12 less likely to be damaged by extension forces from the frozen reducer.
    In order to reduce the volume of the reducing fluid path in the fluid injector 12, the thickness of the part 40 of the valve body is increased. In addition, the spindle member 58 is constructed as a solid member, so that reducer passes around the exterior surface of the spindle member 58 instead of passing therein. The distance between the outer surface of the pin 58 and the inner surface of the part 40 of the valve body, which partly defines the fluid path for the reducing agent in the injector 12, is reduced. This reduced part of the fluid path is the only fluid path for the reducer between the armature 16 and the seat 56 in
    injector 12 of fluid. The fluid path shrunk, Between : spindle 58 and part 40 of · body. valve, provides reducer flow sufficient in the fluid injector 12 p our carry out an i: njection of reducer during a operation normal of UIR 10, all in now a relatively small volume of reducer in 1'injecteu r 12, so at
    reduce the danger that the injector 12 is damaged by the fact that the reducer freezes there.
    In addition, the diameter of the pocket of the frame
    16, in which the spring 50 is arranged at least in part, is reduced, which makes it possible to increase the thickness of the pocket wall 16A of the frame 16. In an embodiment given by way of example, the thickness of the pocket wall 16A represents between 45% and 75% of the diameter of the pocket, such as around 60%.
    The increase in the thickness of the wall 16A of the pocket as well as the increased thickness of the part 40 of the valve body and the fact that the pin element 50 is a solid pin means that the elements of the injector 12 are reinforced and thus more resistant to freezing forces of the reducer.
    In addition, the bore of the spring adjustment tube 52 is dimensioned to reduce the volume of the fluid path of the reducer in the injector 12. In an embodiment given by way of example, the diameter of the bore of the spring adjustment tube 52 represents between
    12% and 22% from < outside diameter of .1 .a piece 46 polar and, in particular, between 16% and 19% of this one. The figure 3 illustrates a part upstream of 1'injecteur 12. Tube element 42 extends at
    less in part in the injector. The fluid path of the reducer in the injector 12 passes through the tube element 42. The injector 12 comprises a filter 204 disposed in the tube element 42 near the open end thereof. Filter 204 is a structurally rigid, sintered metal filter, such as a stainless steel material, to better resist expansion forces from freezing of the reducer. The filter 204 may have an exterior support structure for adding resistance. As best seen in Figure 3, the filter 204 is disposed in a cap member 206. The cap element 206 is of largely cylindrical shape, having a lateral wall 206A extending circumferentially and defining an interior volume dimensioned to receive the filter 204. The cap element 206 is dimensioned to fit in the tube element 42 and, in particular, so that the outer surface of the side wall 206A of the cap element 206 is in contact with the inner surface of the tube element 42. The cap element 206 further comprises annular 206B elements disposed along the axial ends of the cap element 206 and extending radially inward from the wall
    206A lateral. The annular elements 206B serve to hold the filter 204 in the element
    206 of cap in a fixed position. The cap element 206 is made of metal or similar compositions.
    The injector 12 further comprises a ring
    207 retaining element, which is arranged in the tube element 42, upstream of the cap element 206 and in contact therewith, as shown in FIGS. 1 to 3. The retaining element 207 is fixed to the tube element 42, along an interior surface thereof. The retaining ring 207, being fixed in position along the tube element 42, serves to hold elements downstream of the injector 12 in fixed positions in the first part 38 of the injector body. In an exemplary embodiment, the retaining ring 207 is welded along the interior surface of the tube member 42. This welded connection is formed along an entire circumference of the upper edge of the retaining ring 207. However, it goes without saying that other connecting mechanisms can be used to fix the retaining ring 207 to the tube element 42.
    Referring to Figures 1 to 4, the injector further comprises a volume reduction element 208, which serves to further reduce the volume of the reducing fluid path in the injector 12. L element 208 of reduction and mainly of cylindrical shape, as shown in Figure 4, having one end
    top (upstream) and bottom end (downstream). In one embodiment, the volume reduction member 208 is made of a metal, such as stainless steel. It goes without saying, however, that the volume reduction element 208 can be made of other metals or other metallic compositions. The outer surface of the volume reduction element 208 is sized to come into contact with the inner surface of the tube element 42.
    The volume writing element 208 further comprises a bore 208A (FIGS. 2 and 3) defined in the axial direction in the volume reduction element 208, going from an axial end (apex) to the other axial end (bottom). The bore 208A is placed along the longitudinal axis of the volume reduction element 208 and forms itself a part of the fluid path for passing the reducer into the injector 12. The bore 208A forms the single fluid path to pass the reducer through or around the volume reduction member 208. In an embodiment given by way of example, the diameter of the bore 208A represents from 12% to 20% of the outside diameter of the volume reduction element 208, such as approximately 16%. As the volume reduction element 208 extends radially towards the inner surface of the tube element 42 and. as the diameter of the bore 208A is small compared to the outside diameter of the volume reduction element 208, the volume reduction element 208 reduces the space or volume in which the reducer can reside in. injector 12 thereby reducing the volume of the reducing fluid path therein. The volume reduction element 208 also makes it easier to hold the spring adjustment tube 52 in position in the injector 12, so that the spring adjustment tube 52 maintains a desired force on the spring 50, to prevent loss of calibration. More specifically, the retaining ring 207 maintains the position of the filter 204 and of the corresponding cap element 206, which maintains the position of the volume reduction element 208, which maintains the position of the element 52 spring adjustment.
    Referring to Figures 1 to 4, the fluid injector 12 further comprises a volume compensation element 210, which is disposed between the bottom end (upstream) of the element 208 of volume reduction and the top of the pole piece 46. The volume compensation element 210 is made of an elastic material and is used to occupy the space between the volume reduction element 208 and the pole piece 46, so as to further reduce the volume of the fluid path of the reducer in 1 injector 12. The volume compensation element 210 may be in the compressed state in the injector 12 when it is assembled and may be in contact with the volume reduction element 208, the pole piece 46, the surface inside of the tube member 42 and the outside surface of the spring adjusting member 52.
    Figure 5 illustrates part of the downstream end of the fluid injector 12. As can be seen, the seat 56 comprises a bore defined axially in the seat 56. In one embodiment by way of example, the length of the bore passing through the seat 56 is reduced, so as to further decrease the volume of the fluid path of the reducer in the seat 56 and, in particular, the bag volume below the sealing strip of the seat 56, which cooperates with the sealing element 54.
    [0053] next a mode of achievement given as For example, 1'injecteur 12 of fluid includes a plurality discs 212 with orifices arranged 15according to ur  stack * JUcl stack of discs at
    orifice is arranged on the downstream end of the seat 56. In the embodiment given by way of example, which is illustrated in FIG. 5, the stack of discs comprises a first disc 20 212A having one or more orifices, which are configured to provide the desired spray configuration of a reductant outlet injector 12. It goes without saying that the size and the locations of the orifices of the first disc 212A can vary and depend on the reducer dosage requirements of the passenger vehicle engine. The disc stack further comprises a second disc 212B, which is arranged downstream of the first disc 212A and which
    30 includes holes through which thespray of reducer not is. The deu umpteenth212B disc has a thickness more great that this 1 theof the first disc 2Ί2Α and East arranged on the
    first disk 212A and supports the first disk
    212A, so as to prevent that
    212A, thinner, deforms under the forces of expansion coming from frozen reducer upstream of the first disc As mentioned above, the injector 1.2 of fluid, and in particular its elements, are configured to decrease the volume of the fluid path of the reducer in the injector 12. In the embodiments given by way of example, the ratio of the volume of the fluid path in the fluid injector 12 to a volume of the injector elements 12 (y understood but not necessarily limited to the coil 14, the armature 1.6, the pole piece 4 6, the spring adjustment tube 52, the volume reduction element 208, the element
    210 volume compensation, filter 204, retaining ring 207, spring 50, element. 58 of the spindle, the seal element 54, the seat 56, the first part 20Ά of the injector body and the part 40 of the valve body) is between 0.0 8 and 0.30, and in particular between 0.12 and 0.20, such as around 0.15. These volume quantities are calculated between planes orthogonal to the longitudinal axis of the fluid injector 12
    - from a foreground following the end
    element open fluid inlet 30 along the surface second disc 212B fluid). 1.1 will particular volume volume of element d 1
    of tube (that is to say and of a second lowest plane (downstream) of (that is to say the outlet 32 of itself that the ratio of the path of the reducer to the injector in the injector
    12 fluid can vary next ant a certain. number of factors ί related to at cost and at the performance and can take all value range
    between about 0.08 and about 0.30. Providing a fluid injector having a reduced ratio of the volume of the fluid path of the reducer to the volume of the elements of the injector in the fixed range advantageously results in less reducer in the injector 12, which means that the UIR 10 is less likely to be damaged if the reducer in injector 12 freezes.
    In a another example of achievement representedto the figures 6 to 8 f. 1. '' injector 12 of fluidcomprises a item 308 reduction volume, 15 that can see you characters stiques of
    the volume reduction element 208 mentioned above in connection with FIGS. 1 to 5. Like the volume reduction element 208, the volume reduction element 308 is made of stainless steel or a similar composition, is arranged in the element 42 of the fluid injector tube between the volume compensation element 210 and the filter 204. However, the element
    308 volume reduction comprises a first part 308A and a second part 308B. As shown in Figure 7, each of the first part 308 A and. of the second part 308B has a cylindrical shape, the outside diameter of the first 308A being smaller than the outside diameter of the second part
    308B. The outside diameter of the first part
    308A is smaller than the diameter of the second part 308B of the wall thickness
    306A side of the cap element 306, as will be explained in more detail below. Element 308 of. volume reduction includes. upper end (upstream) and bottom (downstream) parts, which form the axial ends of the first part 308A and the second part 308B, respectively. The outer surface of the second part 308B is dimensioned to come into contact with the inner surface of the tube element 42.
    As mentioned, the outside diameter of the first part 308A of the volume reduction element 308 is smaller than the outside diameter of its second
    As shown in FIGS. 6 to 8, volume reduction comprises, angular annular or skirt 308D, in the axial direction between the exterior of the first exterior surface part of the second p serves as a physical interface between them. The angle of the angular surface 308D, with the longitudinal axis, of the volume reduction element 308 and / or the injector 12, is an acute angle. Alternatively, the angel of the angular 308D surface is. orthogonal to the longitudinal axis of the volume reduction element 308 and / or of the injector 12.
    part 308B. element 308 a surface which extends the 3OSA surface and the part 308B and
    [0057] Element 308 reduction of volume comprisesin addition, a bore 308C defined in theaxial direction in the element 308 from reduction
    in volume, going from one axial end (top) to the other axial end (bottom). The bore 308C is placed along the longitudinal axis of the volume reduction element 308 and forms itself a part of the fluid path of the reducer to pass from the reducer into the injector 12, and is the only one fluid path of the reducer passing through or around the volume reduction member 308. In an embodiment given by way of example, the diameter of the bore 308C represents between 12% and 20% of the outside diameter of the volume reduction element 308, such as approximately 16%. As the volume reduction member 308 extends towards the inner surface of the tube member 42 and as the diameter of the bore 308C is relatively small compared to the outside diameter of
    1'élément
    308 volume reduction, the volume reduction member 308 occupies a certain volume in the injector 12, which decreases the space or volume of the fluid path of the reducer in the injector 12, thereby decreasing the amount reducer in injector 12, which could freeze and potentially damage injector 12.
    The cap element 306 includes a number of the same characteristics as the cap element 206 described above, with reference to FIGS. 1 to 5. As shown in FIG. 7, the cap element 306 is , for the most part, of cylindrical shape with a side wall 306A extending circumferentially and defining an interior volume dimensioned to receive a filter 204. The element 306 of cap is dimensioned to fit in the element
    J, β.
    side wall 306A it in contact
    Ια of tube.
    in addition, an annular element 306B from the axial wall end
    Annular 306B maintain filter
    204 in
    1'élément
    306 cap in one dose
    As the element
    The element a metal or analogous compositions and structure at
    In modes of
    1'élément
    308 volume reduction and is attached to it. The
    1'élément
    308 volume reduction thus form a single, unitary and integrated as in the figure
    8.
    Having an eye of the element 306 of the cap and of the element 308 of volume reduction advantageously allows a simpler and complex operation of assembling embodiments given as part less a part firstly an element l ' element 308 for reducing volume and cooperating with it or is fixed in another way, as shown in FIGS. 6 and 8. In an embodiment given by way of example, the element 5 306 of cap is force adjusted with the first part 308A. In another exemplary embodiment, the cap member 306 is welded to the first portion 308A, having, for example, a welded load between the bottom surface 306C of the cap member 306 and the radially outer surface of the first portion 308 A. In each of these embodiments, the angled surface 308D provides sufficient space to attach the cap member 306 to the first portion 308A. It goes without saying that the cap element 306 can be fixed to the first part 308A of the volume reduction element 308 by other mechanisms.
    With the cap element 306, adapting to the first part 308A of the volume reduction element 308, the outside diameter of the side wall 306A is the same or almost the same as the outside diameter of the second part 308A. See Figures 6 and 8.
    As mentioned above, the volume reduction element 308 is made of metal, such as stainless steel, according to an embodiment given by way of example. In another embodiment given by way of example, a part 30 of the second part 308B is made of plastic or of similar compositions. More specifically, as illustrated in FIGS. 9 to 11, a second part 3083 of a second part of the second part is formed.
    308B is made of plastic overmolded around its first
    The.
    gure shows the first part the second part
    The first by of the segment of the first part 308A in one direction (downstream), and a distal segment 308B-4, which is fixed in the axial direction (downstream), as shown on the longitudinal axis, of the element 308 of reduction of volume (and / or of the radial injector of the intermediate segment 308B-3 to form a rim. The second second plastic molded or in other compositions is formed around the rim formed by
    308B-3 intermediate and segment 308B distal, so as to volume in the form of a unitary
    Like ï
    î
    and mentioned above,
    reduction element 308 of volume e st related to cap element 306, of way at give reduction element 308 of volume, the filtered 4 and coi element 306 ffe forming a element
    unique assembly to use for
    During assembly of the injector 12, the single assembly element (filter 204, cap element 306 and volume reduction element 308) is inserted into the element. 42 of pressure tube while coming into contact with the volume compensator 212. After insertion and while still under pressure, the cap member 306 is welded to the tube member 42 along their entire intersection along the top portion of the tube member 42. In one embodiment, the weld is a corner weld.
    Ua ngure illustrates embodiment given to this embodiment, fluid comprises the filter 204 and the element 306 of
    204 is arranged, as described above.
    of fluid includes the tube
    402 for filter calibration and element 408 for volume reduction. The filter calibration tube 402 includes a bore 402A, which is defined axially in the filter calibration tube 402. At one end (upstream) of the filter calibration tube 402, the bore 402A is in fluid communication with the filter 204 to receive reducer therefrom. At the other end (downstream) of the filter calibration tube 402, the bore 402A supplies reducer to the frame 16. The filter calibration tube 402 thus forms part of the fluid path for reducer in the injector 12 of fluid and forms the only fluid path of this kind, going from
    filter 2.04 to the frame 16. With the diameter 402A of the filter calibration tube 402 smaller than the inside diameter of the tube element 42, the volume of fluid path for the reducer in the injector 12 is reduced, so as to decrease the negative effect of freezing the reducing agent.
    As shown in Figures 12 to 14, the tube
    402 for filter calibration further comprises a first end part 402B, which is arranged, at least in part, in the cap element 306, is in contact with the filter 204. The first end part 402B is, for the most part, disc-shaped, having a side wall 402C, which is in contact with the inner surface of the side wall 306A of the cap member 306. In an exemplary embodiment, the first end portion 402B of the element 402 for calibrating fluid is fixed to the cap element 306, so that the cap element 306, the filter 204 and the filter calibration tube 402 form a single, unitary and integrated sub-assembly element to facilitate the simplified assembly of the fluid injector 12. In an embodiment given by way of example, the cap element 306 cooperates with the first end part 402B, and in particular is adjusted there by force. In another exemplary embodiment, a cap member 306 is welded to the first end portion 402B, such as by a corner weld connection between the axial end of the side wall 306A of the cap element 306 and the outer surface of the side wall 402C of the first part 402A. It goes without saying that, as a variant or in addition, the cap element 306 can be fixed to the first end portion 402B of the filter calibration tube 402, using other techniques.
    The filter calibration tube 402 further comprises a second oblong part 402D, which extends in an axial direction from the first part 402A, as shown in FIGS. 12 to 14. The second part 402D is dimensioned so as to extend in the pole piece 46, so that a second end 402E, opposite the first end part 402B, cooperates with the spring 50 (FIG. 12). The second part 402D is, to a large extent, cylindrical in shape. having a bore 402A therein. The filter calibration tube 402 further includes an annular rib 402F, which extends radially outward from the exterior surface of the second portion 402D. The rib 402F extends slightly outward from the outer surface of the second part 402D of the filter calibration tube 402 and is placed along it, so as to come into contact with the inner surface of the polar piece 4 6, defining the central bore thereof. This contact between the rib 402F and the central bore of the polar piece 4 6 means that the filter calibration tube 402 is forcibly fixed to the polar piece 46.
    As mentioned, the second end 402E of the filter calibration tube 402 comes into contact and cooperates with the spring 50. Due to the cooperation between the filter calibration tube 402 and the spring 50 and the cooperation between 1 frame 16 and spring 50, the filter calibration tube 402 is used to calibrate the dynamic current of the reducer in the fluid injector 12. More specifically, by having the cap element 306, the filter 204 and the filter calibration tube 402, formed of a single, unitary and integrated subassembly element, put the filter calibration tube 402 in the desired position in the tube element 42, before welding the cap element 306 to it, is simplified to provide the desired setting force of the spring 50.
    The filter calibration tube 402 is made of a metallic composition, such as stainless steel.
    Continuing to refer to Figures 12 to
    14, the injector 12 further comprises an element
    408 volume reduction, which is arranged around the second part 402D of the filter calibration tube 402. The volume reduction member 408 has a cylindrical shape with a central bore defined axially in the member
    408 volume reduction. The central bore of the volume reduction element 408 is dimensioned to receive the filter calibration tube 402 therein. As shown in Figure 12, the outer radial surface of the element
    The volume reduction 408 is in contact with the interior surface of the tube member 42. One axial end (upstream) of the volume reduction element 408 is disposed in the vicinity of the first end portion 402B of the filter calibration tube 42 and is in contact with it, and the other axial end (downstream) of the volume reduction element 408 is disposed on the upstream end of the pole piece 46 and is in contact with it. The volume reduction element 408 thus occupies the space between the second part 402D of the filter calibration tube 402 and the tube element 42, which is upstream of the pole piece 46 and downstream of the first part 402B end of the filter calibration tube 402. In an exemplary embodiment, the volume reduction element 408 is fixed to the filter calibration tube 402, so that the volume reduction element 408 forms the single unitary element and integrated sub-assembly having the cap element 306, the filter 204 and the filter calibration tube 402.
    In one embodiment by way of example, the volume reduction element 408 is made of an elastic and compressible material and is compressible in at least the axial direction of the fluid injector 12. The volume reduction element 408 being compressible in the axial direction makes it possible to position, in an adjustable manner, the single assembly element (cap element 306, filter 204 and filter calibration tube 402) in the tube member 42 relative to the pole piece 46, so that the opening and closing force of the valve assembly of the fluid injector 12 can be easily calibrated, as desired. In one embodiment, the volume reduction member 408 is closed cell foam. However, it goes without saying that the volume reduction element 408 can be made of another compressible material. If it is made of closed cell foam, the volume reduction member 408 is compressible in both the axial (longitudinal) and radial (lateral) directions. In an exemplary embodiment, the volume reduction member 408 is in a compressed state in the fluid injector 12.
    Figures 15 to 17 illustrate the fluid injector 12 according to another embodiment given by way of example. In this embodiment, the fluid injector 12 comprises the filter 204 and a cap member 6, in which the filter 204 is disposed, as described above. In addition, the filter injector 12 includes the filter calibration tube 502. The filter calibration tube 502 has many features of the filter calibration tube 402 described above with reference to Figures 12-14.
    The filter calibration tube 502 comprises a
    bore 502A , who East axially defined in the 30 tube 502 of C 3 it k) X 3. Cj Θ filter. At one end(Upstream) of tube 502 calibration filtered,
    the bore 502A is in fluid communication with the filter 204 to receive the reducer therefrom.
    end (downstream) of the filter reducer thus forms part of the fluid for in the sole form of
    204 to the filter calibration tube 502, small compared to the internal diameter of the tube element 42, the volume of the fluid path for the reducing agent in the injector 12 is reduced, so as to reduce the negative impact of the reducing agent there freezing.
    As shown in Figures 15 to 17, the tube
    502 for filter calibration further comprises a first end part 502B, which is arranged, at least in part, in the cap element 306 and which is in contact with the filter 204. The first part 502B of the end is, to a large extent, disc-shaped by having a side wall 502C, which is in contact with the inner surface of the side wall 306A of the cap member 306. In an exemplary embodiment, the first end part 502B of the filter calibration element 502 is fixed to the cap 306, so that the cap element 306, the filter 204 and the filter calibration tube 502 form a single, unitary and integrated sub-assembly element to facilitate the simplified assembly of the fluid injector 12. In an embodiment given by way of example, the cap element 306 cooperates with the first end part 502B, and in particular is force-fitted therewith. In another exemplary embodiment, a cap member 306 is welded to the first end portion 502B, such as by a corner weld between the axial end of the side wall 306A of the cap element 306 and the outer surface of the side wall 502C of the first part 502B. It goes without saying that, in addition or as a variant, the cap element 306 can be fixed to the first end part 502B of the filter calibration tube 502, using other techniques.
    The filter calibration tube 502 further comprises a second oblong part 502D, which extends in an axial direction from the first part 502A, and a third oblong part 502E, which extends in the axial direction from part of the second part 502D, as shown in FIGS. 15 to 17. The third part 502E is dimensioned so as to extend in the pole piece 46, so
    502 from
    End 502B, second
    502E measure, first form with part
    502D are, in a cylindrical having 1 part and the large bore
    502A yes is planned.
    [0075]
    In an exemplary embodiment, the outside diameter of the second part 502D is larger than the outside diameter of the third part 502E. The outside diameter of the third part 502E is dimensioned to be received in the central bore of the pole piece 46.
    [0077] [0078]
    The filter calibration tube 502 further comprises an annular rib 502G (FIG. 17), which extends radially outwards from the external surface of the third part 502Ξ. The rib 502G extends slightly outward from the exterior surface of the third part 502E of the filter calibration tube 502, being placed axially along it, so as to be in contact with the interior surface. of the pole piece 46 by defining the central bore. This contact between the rib 502G and the central bore of the pole piece 46 gives a filter calibration tube 502 with forced adjustment with the pole piece 46.
    The filter calibration tube 502 is made of a metallic composition, such as stainless steel.
    As mentioned, the second end 502F of the filter calibration tube 502 is in contact and cooperates with the spring 50. Due to the cooperation between the filter calibration tube 502 and. the spring 50 and the cooperation between the spring 50 and the frame 16, the filter calibration tube 502 is used to calibrate the dynamic reducer cost passing through the fluid injector 12. More precisely, by having the cap element 306, the filter 204 and the filter calibration tube 502 in the form of a single, unitary and integrated subassembly element, put the filter calibration tube 502 in the desired position. in the element 4.2 of the tube before welding the element 306 thereon, is simplified to give the taring force
    wished to spring 50 for adjust the force antagonist opening and closing of 1'ensemble valve from 1 '' injector 12 of fluid.
    Continuing to refer to Figures 15 to
    17, the injector 12 further comprises an element
    508 volume reduction, which is arranged around the second part 502D of the filter calibration tube 502. The volume reduction member 508 has a generally cylindrical shape with a central bore defined axially in the member
    508 reduction
    volume reduction is sized for y
    receiving a second part 502D from the filter calibration tube 502. As shown in the figure
    12, the outer radial surface of the element
    The volume reduction 508 is in contact with the interior surface of the tube member 42. An axial end (upstream) of the volume reduction element 508 is disposed in the vicinity of the first end part 502B of the filter calibration tube 42 and. is in contact with it, and the other axial end (downstream) of the volume reduction element 508 is disposed on volume, thus occupying the space between the second and and downstream
    End 502B
    In one example, is in one of the mode of 'element.
    compressible material in volume reduction, less unique filter
    JL Cl d 'direction assemblage
    204 and mi s tube is upstream from the first part
    508 compressible reduction, such minus the direction being axial, i e.
    the volume itre
    L ! element that being axial
    508 from from to allows the element to
    502 filter calibration) position so that the calibrated assembly as an embodiment given volume is in the compressed state in the fluid injector.
    A g o. x / de
    508 volume reduction includes downstream of which
    End 508B
    508 for volume reduction from the side wall 508A e is in contact with the external surface of the third part 502Ξ of the filter calibration tube 502. The axial end upstream of the volume reduction element 508 can be open and be in contact with a surface downstream from the first part 502B of the filter calibration tube 502.
    The side wall 508A of the volume reduction element 508 is corrugated in an axial direction, as shown in FIGS. 15 to 17, with alternating side wall peaks and valleys in a configuration
    wavy by compared to 1 'axis longitudinal e element 508 reduction of volume and / or the injector U 2. Have a side wall 508A wavy makes easier than the 5OSA wall lateral either compressible or pi smooth sag in. part a utterly, to the times in
    axial (longitudinal) and radial (lateral) directions. In an embodiment given by way of example, the element. 508 volume reduction is made of an elastic compressible material, such as a rubber composition or the like. The element. 508 reduction
    volume can to be in a state compressed in 1 injector 12. of fluid.
    Reality modes Donation given as example have summer described here as illustration and he Obviously that the terminology, qu i was used, is destined to to be the type of words of description rather than
    limitation. It goes without saying that many modifications and variations of the invention can be made in the light of the above teachings. The above description is given simply by nature by way of example and modifications can be made without departing from the spirit and scope of the invention.
    权利要求:
    Claims (16)
    [1" id="c-fr-0001]
    Reducer injection unit (10), characterized in that it comprises:
    a fluid injector (12) having a fluid inlet (30) disposed at a first end of the fluid injector (12) for receiving a reducer, and a fluid outlet (32) arranged for fluid to discharge the reducer, (12) of tube of fluid 1, (42) of inlet path being configured of fluid for the (12 an area of fluid end, pass according to disposed tube, near fluid of the injector ( 12) fluid;
    a filter calibration tube (52), disposed in the tube element (42), downstream of the filter (204), relative to a direction of flow of the reducer in the fluid path, from the inlet ( 30) of fluid at the outlet (32) of fluid from the injector (12) of fluid,
    the tube (52) calibration filter having a first part end v filter insert (204) and a second end, and . further comprising a bore, defined in a axial direction, in the tube (52) calibration filter, bore
    defining at least a portion of the fluid path in the fluid injector (12);
    an actuator unit, disposed in the fluid injector (12) downstream of the filter calibration tube (52), the actuator unit cooperating with the second end of the filter calibration tube (52);
    a valve assembly, operatively coupled to the actuator unit, a position of the filter calibration tube (52) in the tube element (42) controlling, at least in part, an opposing force of opening of the valve assembly and a volume reduction member (208) having a bore through which the filter sizing tube (52) passes, the volume reduction member (208) occupying a space between an outer surface of the tube ( 52) of filter calibration and an inner surface of the tube element (42), in which the filter (204), the filter calibration tube (52) and the volume reduction element (202) form a unit component for subassembly of the fluid injector (12).
    [2" id="c-fr-0002]
    2. reducer injection unit according to claim 1, characterized in that the volume reduction element (208) is made of a compressible material.
    Injection unit reducer next the claim 2, in laquelie the material iau compressible includes l 1'one of a composition of
    [3" id="c-fr-0003]
    4. reducer injection unit according to claim 2, characterized in that the volume reduction element (208) comprises a side wall, the side wall of the volume reduction element (208) undulating in one direction along a longitudinal axis of the injector (12) of .1.
    [4" id="c-fr-0004]
    5. reducer injection unit according to claim 1, characterized in that the fluid injector (12) comprises a cover element (206), comprising a side wall defining an interior space in which the filter is disposed, the side wall being in contact with the first end of the filter calibration tube.
    6. Unit reducer injection next the revendi cation 5, characterized in that the first part end of the tube (52) of calibration of 20 filtered is arranged in space inside of 1'éléme nt (206) of cap.7. Unit reducer injection next 1 a
    claim 5, characterized in that the first
    25 end part of the filter calibration tube (52) is fixed to the side wall of the cover element (206) so that the filter calibration tube (52), the element (206 ) of the cap, the volume reduction element (208) and the filter
    30 (204) form a unitary sub-assembly component of the fluid injector (12).
    [5" id="c-fr-0005]
    8. reducer injection unit according to claim 1, characterized in that the actuator unit comprises a pole piece (46), disposed in a fixed position in the fluid injector and comprising a bore defined axially in the pole piece (46), a frame (16) movably positioned in the fluid injector and comprising a pocket, a coil (14) disposed near the piece (46) pole and the frame ( 16) and a spring (50) disposed, at least in part, in the pocket of the frame (16), the filter calibration tube (52) being disposed in the bore of the pole piece (46), so that the second end of the filter calibration tube (52) is in contact with the spring (50), and the spring (50) moves the armature (16) away from the pole piece (46) absence of current passing through the coil (14), so as to put the valve assembly in a closed position to prevent re- conductor passes into the fluid outlet (32).
    Reducer injection unit according to claim 8, characterized in that the filter calibration tube (52) comprises a second part, which extends axially from the first end part of the filter calibration tube, and a third part, arranged between the second part and the second end of the filter calibration tube, the volume reduction element being arranged around the second part, the third part being arranged in the bore of the pole piece and one end, downstream of the volume reduction element, being near an end upstream of the pole piece, relative to the direction of flow of the reducer in the fluid path.
    [6" id="c-fr-0006]
    10. Reducer injection unit according to claim 9, characterized in that an outside diameter of the second part of the filter calibration tube is larger than an outside diameter of its third part.
    [7" id="c-fr-0007]
    11. Fluid injector (12), comprising:
    a fluid inlet (30) disposed at a first end and configured to receive a fluid, and a fluid outlet (32) disposed at a second end of the fluid injector for discharging the fluid, the injector (12 ) fluid defining a fluid path from the fluid inlet (30) to the fluid outlet (32);
    a tube member (42) having one end disposed at or near the fluid inlet of the fluid injector (12), the tube member (42) being configured to pass of the reducer, along the fluid path;
    a filter (204), disposed in the tube member (42), near the inlet of the fluid inlet (30) of the fluid injector (12);
    a filter calibration tube (52) disposed in
    1'élément (42) of tube, downstream. of the filter (204), by compared to a : meaning flow of the reducer da ns the journey from fluid, from the entrance (30) fluid 8. Here
    fluid outlet (32) of the fluid injector (12), the filter calibration tube (52) having a first end portion adjacent to the filter (204) and a second end, and further comprising a bore, defined in an axial direction, in the filter calibration tube (52), the bore defining at least a portion of the fluid path in the fluid injector (12);
    an actuator unit, disposed in the fluid injector (12) downstream of the filter calibration tube (52), the actuator unit cooperating with the second end of the filter calibration tube (52);
    a valve assembly, operatively coupled to the actuator unit, a position of the filter calibration tube (52) in the tube element (42) adjusting, at least in part, an opposing force
    opening from 1' 'together valves and an element (206) cap having a side wall ale defining a space i inside where the filter (204: ) East disposed, the side wall being in
    contact and being attached to the first end of the filter calibration tube (52) so that the cover member (206), the filter (204) and the filter calibration tube (54) form a component single sub-assembly of the fluid injector (12).
    [8" id="c-fr-0008]
    12. Fluid injector according to claim. 11, characterized in that it comprises the reduction element having a bore in which the filter calibration tube extends, the volume reduction element occupying a space between an outer surface of the filter calibration tube and an inner surface of the tube element, the volume reduction element, the cap element, the filter and the filter calibration tube forming the component, the sole sub-assembly of the fluid injector.
    [9" id="c-fr-0009]
    13. Fluid injector according to claim 12, characterized in that the volume reduction element is compressible.
    [10" id="c-fr-0010]
    14. The fluid injector of claim 13, wherein the volume reduction member is constructed of one of a rubber composition and a closed cell foam.
    [11" id="c-fr-0011]
    15.
    Fluid injector according to claim 12, one of side wall volume, the side wall of volume reduction undulating along a longitudinal axis of the fluid injector.
    [12" id="c-fr-0012]
    16. Fluid injector according to claim 12, characterized in that the actuator unit comprises a pole piece (46), disposed in a fixed position in the fluid injector and comprising a bore defined axially in the piece (46 ) pole, a frame (16) movably positioned in the fluid injector and comprising a pocket, a coil (14) disposed near the piece (46) pole and the frame (16) and a spring (50) disposed, at least in part, in the pocket of the frame (16), the filter calibration tube (52) being disposed in the bore of the pole piece (46), so that the second end of the filter calibration tube (52) is in contact with the spring (50), and the spring (50) moves the armature (16) away from the pole piece (46), in the absence of a current passing through the coil (14), so as to put the valve assembly in a closed position to prevent reduction tor passes through the fluid outlet (32).
    [13" id="c-fr-0013]
    17. Fluid injector according to claim 15, characterized in that the filter calibration tube (52) comprises a second part, which extends axially from the first end part of the filter calibration tube, and a third part, disposed between the second part and the second end of the filter calibration tube, the volume reduction element being disposed part, polar part being arranged in 1 and one end, downstream of the volume reduction element , being near an end upstream of the pole piece, relative to the direction of flow of the reducer in the fluid path.
    [14" id="c-fr-0014]
    18. Fluid injector according to claim 17, characterized in that an outside diameter of the second part of the filter calibration tube is larger than an outside diameter of its third part.
    [15" id="c-fr-0015]
    19. Fluid injector according to claim 17, characterized in that the filter calibration tube further comprises an annular paste, which extends from the third part of the filter calibration tube, is arranged in the bore of the pole piece and is force fitted therewith.
    [16" id="c-fr-0016]
    20. Fluid injector characterized in that from the calibration tube the interior space according to the first filter resells! ca t. ion 11, end part is arranged in the cap element.
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    同族专利:
    公开号 | 公开日
    CN109505684A|2019-03-22|
    KR20190030632A|2019-03-22|
    JP2019056374A|2019-04-11|
    FR3071011B1|2021-10-22|
    CN109505684B|2021-06-01|
    KR102127048B1|2020-06-25|
    DE102018215678A1|2019-03-14|
    JP6661720B2|2020-03-11|
    US20190078488A1|2019-03-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5335863A|1993-05-03|1994-08-09|Siemens Automotive L.P.|Filter cartridge mounting for a top-feed fuel injector|
    DE10058015A1|2000-11-23|2002-05-29|Bosch Gmbh Robert|metering valve|
    US7458530B2|2001-10-05|2008-12-02|Continental Automotive Systems Us, Inc.|Fuel injector sleeve armature|
    DE10334785A1|2003-07-30|2005-02-24|Robert Bosch Gmbh|Fuel injection valve and method for its assembly|
    DE102004005727A1|2004-02-05|2005-09-01|Robert Bosch Gmbh|fuel injection system|
    DE102004025062B4|2004-05-18|2006-09-14|Hydraulik-Ring Gmbh|Freezer-compatible metering valve|
    DE102005040361A1|2005-08-26|2007-03-01|Robert Bosch Gmbh|Metallic components for electromagnetically operated fuel injection valve, have surface-roughening structure that is provided by laser, where metal oxides such as chrome oxides are deposited in roughening structure|
    US8225602B2|2009-06-11|2012-07-24|Stanadyne Corporation|Integrated pump and injector for exhaust after treatment|
    US8813722B2|2010-08-09|2014-08-26|Hitachi Automotive Products |Fuel injector holder|
    DE102011102170A1|2011-05-20|2012-11-22|Emitec Gesellschaft Für Emissionstechnologie Mbh|Injection device for injecting a fluid|
    DE102013201897A1|2013-02-06|2014-08-07|Robert Bosch Gmbh|Valve for metering fluid|
    US9273581B2|2013-10-24|2016-03-01|Continental Automotive Systems, Inc.|Purge system for reductant delivery unit for a selective catalytic reduction system|
    DE102015217673A1|2015-09-15|2017-03-16|Continental Automotive Gmbh|Injection device for metering a fluid and motor vehicle with such an injection device|
    EP3153693B1|2015-10-09|2018-07-18|Continental Automotive GmbH|Fuel injector|DE102015217673A1|2015-09-15|2017-03-16|Continental Automotive Gmbh|Injection device for metering a fluid and motor vehicle with such an injection device|
    US10539057B2|2017-09-14|2020-01-21|Vitesco Technologies USA, LLC|Injector for reductant delivery unit having reduced fluid volume|
    US10502112B2|2017-09-14|2019-12-10|Vitesco Technologies USA, LLC|Injector for reductant delivery unit having fluid volume reduction assembly|
    US10947880B2|2018-02-01|2021-03-16|Continental Powertrain USA, LLC|Injector for reductant delivery unit having fluid volume reduction assembly|
    法律状态:
    2019-09-26| PLFP| Fee payment|Year of fee payment: 2 |
    2020-08-14| PLSC| Publication of the preliminary search report|Effective date: 20200814 |
    2020-09-14| PLFP| Fee payment|Year of fee payment: 3 |
    2021-09-21| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    US15704402|2017-09-14|
    US15/704,402|US20190078488A1|2017-09-14|2017-09-14|Injector for reductant delivery unit having fluid volume reduction assembly|
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