EP2295781A2 - Système de réinjection de gaz d'échappement d'un moteur à combustion interne et vanne de retour de gaz d'échappement - Google Patents

Système de réinjection de gaz d'échappement d'un moteur à combustion interne et vanne de retour de gaz d'échappement Download PDF

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Publication number
EP2295781A2
EP2295781A2 EP10290445A EP10290445A EP2295781A2 EP 2295781 A2 EP2295781 A2 EP 2295781A2 EP 10290445 A EP10290445 A EP 10290445A EP 10290445 A EP10290445 A EP 10290445A EP 2295781 A2 EP2295781 A2 EP 2295781A2
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EP
European Patent Office
Prior art keywords
exhaust gas
gas recirculation
valve
valve body
combustion engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10290445A
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German (de)
English (en)
Other versions
EP2295781A3 (fr
Inventor
Thierry Dr. Marimbordes
Pascal Noiseau
Jérôme Migaud
Mickael Cormerais
Christophe Voegele
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Mann and Hummel GmbH
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Mann and Hummel GmbH
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Publication date
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Publication of EP2295781A2 publication Critical patent/EP2295781A2/fr
Publication of EP2295781A3 publication Critical patent/EP2295781A3/fr
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/1055—Details of the valve housing having a fluid by-pass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
    • F02M26/54—Rotary actuators, e.g. step motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F02M26/58—Constructional details of the actuator; Mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/59—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/64—Systems for actuating EGR valves the EGR valve being operated together with an intake air throttle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/68—Closing members; Valve seats; Flow passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/24—Layout, e.g. schematics with two or more coolers

Definitions

  • the invention relates to an exhaust gas recirculation system of an internal combustion engine, in particular a diesel engine, in particular of a motor vehicle with an exhaust gas recirculation valve, which is arranged in an exhaust gas recirculation line between an exhaust pipe and a fresh gas line.
  • the invention also relates to an exhaust gas recirculation valve of an exhaust gas recirculation system of an internal combustion engine, in particular a diesel engine, in particular a motor vehicle having a housing in which a valve body actuated by a control device and a valve seat are arranged, wherein the exhaust gas recirculation valve are arranged in an exhaust gas recirculation line between an exhaust pipe and a fresh gas line can.
  • an exhaust gas recirculation system of an internal combustion engine is known.
  • the exhaust gas recirculation system comprises an exhaust gas recirculation line, via which exhaust gas is branched off from an exhaust gas line and can be fed to a suction pipe.
  • an exhaust gas recirculation valve is arranged, which, for example is actuated via an adjusting device, which in turn is controlled by an engine control unit.
  • a throttle valve for intake fresh air is arranged in the flow direction before the confluence of the exhaust gas recirculation line.
  • the exhaust gas recirculation valve is arranged as a separate component spatially separated from the intake manifold and the throttle valve.
  • the invention has for its object to design an exhaust gas recirculation system and an exhaust gas recirculation valve of the type mentioned, which are possible space, assembly and component saving.
  • the exhaust gas recirculation valve is implemented as exhaust gas recirculation module with at least one further functional component of the exhaust gas recirculation system.
  • an exhaust gas recirculation module is realized in which a plurality of functional components are integrated in a space-saving, assembly-saving and component-saving manner. Connections of control and / or signal lines in particular to an engine control unit can be easily combined. Furthermore, actuating and actuating devices for the functional components, in particular the adjusting device for the exhaust gas recirculation valve and the throttle valve, can be combined.
  • the exhaust gas recirculation module can simply be completely replaced or simply removed for cleaning and maintenance of the functional components.
  • the exhaust gas recirculation module with all functional components can be simply pre-assembled and easily used in the final assembly of the internal combustion engine.
  • the exhaust gas recirculation module can be arranged to save space on the fresh gas line, in particular a suction tube.
  • the exhaust gas recirculation module is further adapted in function and / or shape to the spatial and / or functional requirements of the internal combustion engine in which it is used.
  • the further functional component may be a coarse filter and / or a throttle flap and / or an exhaust gas recirculation mixer.
  • the coarse filter the recirculated exhaust gas can be cleaned to prevent coarse particles from entering the exhaust gas recirculation valve.
  • the service life of the exhaust gas recirculation valve can be increased and the maintenance intervals can be extended.
  • the risk of pollution due to pollution of the exhaust gas recirculation valve is reduced.
  • the combination of the exhaust gas recirculation valve with the throttle valve has the advantage that an adjusting device for the exhaust gas recirculation valve can also be used for the throttle valve.
  • the exhaust gas recirculation mixer the exhaust gas recirculated via the exhaust gas recirculation line and the exhaust gas recirculation valve can be optimally optimally mixed with the intake fresh gas.
  • the exhaust gas recirculation module on a low pressure side the internal combustion engine, in particular an exhaust gas turbocharger of the internal combustion engine, be arranged. It can be used so light, inexpensive and easy to process materials.
  • At least one housing of the exhaust gas recirculation module is made of plastic.
  • Plastic is lightweight, inexpensive and easy to process.
  • plastic is easy and inexpensive to reuse.
  • the exhaust gas recirculation valve which has a pressure compensation system, which compensates for force effects from pressure differences between an inlet side and an outlet side of the exhaust gas recirculation valve to a valve body.
  • the pressure compensation system ensures that the sealing effect of the exhaust gas recirculation valve and a nominal force of an actuator required for actuating the exhaust gas recirculation valve are independent of pressure differences between the inlet side and the outlet side. It can also be used weaker actuators, which has a positive effect on the size.
  • the sealing function is separate from a progressive passage function of the exhaust gas recirculation valve.
  • the passage function describes the variation of the flow rate of recirculated exhaust gas with respect to the opening degree of the exhaust gas recirculation valve. "Progressive" in the sense of the invention means that when opening the exhaust gas recirculation valve the flow rate increases disproportionately to the degree of opening of the valve body.
  • the pressure compensation system may have a counter-pressure body, in particular a diaphragm, which is mechanically coupled to the valve body, such that it exerts a compensating force on the valve body due to the pressure differences, which a pressure force due to the pressure differences directly on the valve body acts, counteracts.
  • a counter-pressure body in particular a diaphragm
  • this prevents the valve body from being pushed away by the resulting pressure force and the exhaust gas recirculation valve being opened when the pressure on the side of the valve seat is high. Even pressure fluctuations are easily compensated.
  • the membrane is very light and has the advantage that it works largely frictionless.
  • the valve seat can be formed as an independent component and can be arranged within predetermined limits, in particular via a flexible connecting part, preferably a flexible ring, movably in the housing of the exhaust gas recirculation valve.
  • a flexible connecting part preferably a flexible ring
  • the valve seat which can be moved within limits allows automatic centering by automatically centering the valve seat with respect to the valve body when the exhaust gas recirculation valve is being closed by compressing the flexible connection part.
  • the flexible connection part further compensates for pressure fluctuations between the inlet side and the outlet side of the exhaust gas recirculation valve and improves the sealing effect.
  • the mutually facing surfaces of the valve body and the valve seat on the inlet side in the passage direction to run towards each other, abut in the closed position of the exhaust gas recirculation valve to mutual contact surfaces and realize a progressive course of the passage of the passage opening when opening the exhaust gas recirculation valve.
  • the valve body may have a convex profile, in particular a fourth-order profile.
  • valve seat can advantageously have a convex profile viewed from the valve body.
  • valve body may be mounted in two housings fixed to the housing. In this way, the valve body is guided in the housing.
  • one of the bearings can a flexible connection part, in particular a flexible ring, be mounted in order to compensate for tolerances and / or pressure fluctuations, which prevail in particular when used in an internal combustion engine with an exhaust gas turbocharger.
  • At least the housing may be made of plastic.
  • Plastic is lightweight, inexpensive and can easily be processed into complex components.
  • at least the housing is compatible with other plastic components of the internal combustion engine, in particular the intake manifold or a different kind of fresh gas line.
  • Plastic can advantageously be easily and inexpensively reusable.
  • other components of the exhaust gas recirculation valve in particular the valve body, the valve seat, the bearings and clamping elements, in particular springs, for holding the valve body, made of plastic.
  • an exhaust gas recirculation module of an exhaust gas recirculation system in particular an exhaust gas recirculation system according to the invention, an internal combustion engine, in particular a diesel engine, in particular a motor vehicle, which can be arranged in an exhaust gas recirculation line between an exhaust pipe and a fresh gas line, with an exhaust gas recirculation valve, in particular an exhaust gas recirculation valve according to the invention, and with at least one further functional component.
  • An exhaust gas recirculation module with multiple functional components can be easily prefabricated and connected to the exhaust gas recirculation line and possibly with the fresh gas line of the internal combustion engine, preferably integrated into this.
  • the exhaust gas recirculation module which may preferably be made of plastic, can also be used advantageously on the low pressure side of an exhaust gas turbocharger.
  • the further functional component may be a coarse filter and / or a throttle flap and / or an exhaust gas recirculation mixer. In this way, a plurality of required functional components can be easily and compactly combined with the exhaust gas recirculation valve.
  • FIG. 1 a diesel engine 10 of a motor vehicle with an exhaust gas turbocharger 12 and an exhaust gas recirculation system 14 is shown.
  • the exhaust gas recirculation system 14 is disposed in an exhaust gas recirculation line 16 between an exhaust pipe 18 and a suction pipe 20.
  • the exhaust gas recirculation system 14 includes an exhaust gas recirculation module 22, which in the FIG. 2 shown in detail.
  • the exhaust gas recirculation module 22 has an exhaust gas recirculation valve 24, a coarse filter 26 for recirculated exhaust gas 27, a throttle valve 28 for supplied fresh air and a in the Figures 2 and 4 shown exhaust gas recirculation mixer 30 for mixing the recirculated exhaust gas 27 with the supplied fresh air 29th
  • the exhaust gas recirculation module 22 is integrated on the low-pressure side of the exhaust gas turbocharger 12, in the flow direction of the fresh air 29 behind an air filter 32 and in front of a compressor 34 of the exhaust gas turbocharger 12 in the intake manifold 20.
  • the coarse filter 26 and the exhaust gas recirculation valve 24 are disposed between the exhaust pipe 18 and the suction pipe 20.
  • an exhaust gas recirculation cooler 35 is arranged in the flow direction of the recirculated exhaust gas 27 in front of the exhaust gas recirculation module 22.
  • the suction pipe 20 and a multi-part housing 36 of the exhaust gas recirculation module 22 are made of plastic.
  • the exhaust gas recirculation valve 24 is in the Figures 2 and 3 shown in detail.
  • Exhaust gas recirculation valve 24 includes an inlet chamber 38 and an exhaust gas recirculation exhaust chamber 27 and a pressure equalizing chamber 42.
  • the inlet chamber 38 is located between the pressure equalizing chamber 42 and the exhaust chamber 40.
  • the inlet chamber 38 is surrounded by an inlet chamber housing part 44.
  • an inlet port 46 for the recirculated exhaust gas 27 is integrally fixed.
  • the inlet port 46 is connected to the exhaust pipe 18.
  • the coarse filter 26 is arranged.
  • the coarse filter 26 filters particles from the recirculated exhaust 27, which are greater than 0.2 mm. It is also possible to use a different coarse filter 26 for other particle sizes.
  • the inlet chamber 38 and the outlet chamber 40 are connected to each other via a valve opening 48.
  • the valve opening 48 is, as in the Figures 2 and 3 is shown, with a valve body 50 closed.
  • the valve body 50 can be actuated via a control device 52.
  • the control device 42 is controllably connected to an engine control unit, not shown.
  • the valve body 50 is movable in the direction of an axis 54 for opening and closing. In the closed position shown, the valve body 50 abuts circumferentially on a valve seat 56 which is approximately central to the valve opening 48.
  • the valve seat 56 is formed as an independent component annular with an approximately L-shaped profile.
  • One leg of the valve seat 56 extends axially to the axis 54, with its free edge facing the outlet chamber 40.
  • the axially extending leg forms in the region of its free edge radially inward a cylindrical valve seat contact surface 58.
  • the second leg of the valve seat 56 extends radially to the axis 54, wherein its free edge is located radially outward.
  • the radially inner surface of the valve seat 56 away from the valve seat contact surface 58 is viewed in a funnel-like convex manner from the inlet chamber 38.
  • the valve seat 56 is disposed on a flexible O-ring 60.
  • the O-ring 60 abuts a step 62 surrounding the valve port 48.
  • the step 62 is located in the axial direction between the inlet chamber housing part 44 and an axially inner outlet chamber housing part 64a.
  • the outer one Dimension of the valve seat 56 in the radial direction in the region of the free edge of the leg, which extends axially to the axis 54, is smaller than the valve opening 48.
  • the valve seat 56 is limited, which are essentially predetermined by the flexibility of the O-ring 60, movable relative to the valve opening 48 in the axial and radial directions.
  • the valve seat 56 facing surface of the valve body 50 has a convex profile, preferably a fourth-order profile, on.
  • the valve body 50 terminates with a valve disk 66 which extends in the radial direction and is located in the outlet chamber 40.
  • the radially outer edge of the valve disk 66 merges into a projection 66a which extends in the axial direction to the inlet chamber 38.
  • the projection 66a abuts the end face of the axially inner discharge chamber housing part 64a of the discharge chamber 40.
  • the valve body contact surface 58 then abuts against a corresponding valve body contact surface 68 of the valve body 50.
  • a circumferential seal 70 is arranged, which acts sealingly in the closed position.
  • valve body 50 and the valve seat 56 run on the inlet side while maintaining a narrow gap in the passage towards each other and so realize a progressive course of the flow rate of recirculated exhaust gas when opening the exhaust gas recirculation valve 24th
  • a helical compression spring 72 coaxial with the axis 54 is arranged in the outlet chamber 40.
  • the compression coil spring 72 is biased and holds the valve body 50 in the idle state of the exhaust gas recirculation valve 24 in the closed position shown.
  • the spiral compression spring 72 is supported at one end on the side facing away from the valve seat 56 of the valve plate 66 and the other end on the inside of the end wall of an axially outer Auslasshuntgephinuseteils 64b.
  • the axially outer discharge chamber housing portion 64b defines the discharge chamber 40 with the axially inner discharge chamber housing portion 64a.
  • the axially inner discharge chamber housing portion 64a is integrally connected to the inlet chamber housing portion 44.
  • the plunger 74 extends in the axial direction on both sides of the valve body 50 from the pressure compensation chamber 42 through the inlet chamber 38 and the outlet chamber 40 therethrough.
  • the plunger 74 is as in the FIG. 2 shown connected outside of the valve housing with the controller 52. With the plunger 74, the valve body 50 can be moved back and forth in the axial direction.
  • the plunger 74 In the area between the pressure compensation chamber 42 and the outlet chamber 40, the plunger 74 is hollow.
  • the cavity has a pressure equalization opening 76 to the pressure compensation chamber 42 and a pressure equalization port 78 to the outlet chamber 40. Via the pressure compensation openings 76 and 78 and the cavity between the pressure equalization chamber 42 and the outlet chamber 40, a pressure equalization takes place, so that in both chambers 40 and 42, the same pressure prevails.
  • the plunger 74 and thus the valve body 50 are mounted fixed to the housing in two bearings 80.
  • One of the bearings 80 is held with a wing-like bearing 82.
  • the storage 82 is located in a frusto-conical compensation chamber housing part 84, which surrounds the pressure compensation chamber 42.
  • a second of the bearings 80 is disposed in an end wall remote from the inlet chamber 38 of the axially outer Auslasshuntgephinuseteils 64b.
  • the pressure compensation chamber 42 is separated by a flexible plastic membrane 86 tightly from the inlet chamber 38.
  • the membrane 86 is generally cup-shaped with the open side facing the inlet chamber 38.
  • the radially outer edge of the diaphragm 86 is configured as an outer support frame 86a, which is tightly clamped between the end faces of the Aus GmbHscrogephaseusetells 84 and the inlet chamber housing part 44.
  • the membrane 86 has a central membrane opening 86b through which the plunger 74 passes.
  • the radially inner The edge surrounding the diaphragm opening 86b is configured as an inner support frame 86c.
  • the inner support frame 86c is tightly secured to a support plate 88 which is integrally connected to the plunger 74.
  • the diaphragm 86 is mechanically coupled to the valve body 50 via the plunger 74.
  • the differential pressure When the exhaust gas recirculation valve 24 is closed, the differential pressure may be, for example, about 350 mbar. With the exhaust gas recirculation valve 24 open, the differential pressure may be, for example, 60 mbar. In the exhaust gas recirculation module 22, an operating temperature of example up to about 200 ° C prevail. Depending on the operating state of the diesel engine 10 and / or design of the exhaust gas recirculation module 22, other differential pressures and / or operating temperatures may be present.
  • the membrane 86, the plunger 74 with the cavity, the valve body 50 with its special surface shape and the separate, movable valve seat 56 form a total of a pressure compensation system.
  • the pressure compensation system compensates for force effects from pressure differences between the inlet chamber 38 and the outlet chamber 40 on the valve body 50.
  • the two Auslasshuntgeophusemaschine 64 a and 64 b are integrally connected to a respective annular space housing portion 89 a and 89 b of the exhaust gas recirculation mixer 30.
  • the exhaust gas recirculation mixer 30 is in the FIG. 4 shown in detail.
  • an opening 90 of the axially outer discharge chamber housing portion 64b to the annular space 92 defined with the annular space housing portions 89a and 89b is shown.
  • the annular space housing parts 89a and 89b are integrally fixed to the radially outer circumferential surfaces of respective intake manifold housing parts 94a and 94b in the region of the end faces thereof, respectively. They define with the end portions of the Saugrohrgeophusemaschine 94a and 94b respectively an approximately U-shaped part of the annular space 92.
  • the Saugrohrgeophusemaschine 94a and 94b are each composed of two half-shells.
  • the exhaust gas recirculation module 22 is inserted into the intake manifold 20 via the intake manifold housing parts 94a and 94b.
  • a plurality of intake manifold openings is arranged circumferentially distributed, which the interior of the Ringraumgeophuseteils 89a and 89b with the interior of Saugrohrgeophusemaschine 94a and 94b and connect via this with the suction pipe 20.
  • the intake pipe openings 96 Through the intake pipe openings 96, the recirculated exhaust gas 27 flows to the intake manifold 20 and is mixed with the fresh air 29.
  • the throttle valve 28 is arranged in the intake manifold housing part 94b.
  • the throttle valve 28 may be actuated via a connection, not shown, with the control device 52. But it can also have a separate adjusting device.
  • the invention is not limited to use in diesel engines 10 of motor vehicles. Rather, it can also be used in other types of internal combustion engines, such as industrial engines.
  • the exhaust gas recirculation module 22 may have, in addition to the exhaust gas recirculation valve 24, only a single further functional component or more than two further functional components. Instead of the coarse filter 26 and / or the throttle valve 28 or in addition to these, other types of functional components may also be integrated in the exhaust gas recirculation module 22.
  • a different kind of counterpressure body for example a piston guided in a cylinder, can also be used.
  • valve seat 56 may be arranged to be movable in another way, for example on another flexible connecting part.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
EP10290445.5A 2009-09-14 2010-08-17 Système de réinjection de gaz d'échappement d'un moteur à combustion interne et vanne de retour de gaz d'échappement Withdrawn EP2295781A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009041154A DE102009041154A1 (de) 2009-09-14 2009-09-14 Abgasrückführungssystem einer Brennkraftmaschine und Abgasrückführventil

Publications (2)

Publication Number Publication Date
EP2295781A2 true EP2295781A2 (fr) 2011-03-16
EP2295781A3 EP2295781A3 (fr) 2013-12-25

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EP (1) EP2295781A3 (fr)
DE (1) DE102009041154A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20120135A1 (it) * 2012-03-15 2013-09-16 Magneti Marelli Spa Valvola a farfalla con diffusione anulare di gas di ricircolo per un condotto di aspirazione di un motore a combustione interna
FR3007071A1 (fr) * 2013-06-17 2014-12-19 Peugeot Citroen Automobiles Sa Moteur thermique a actionneur commun pour vanne egr et vanne d'air
CN104279089A (zh) * 2013-05-28 2015-01-14 福特汽车萨纳伊股份有限公司 排气再循环***
EP3093480A1 (fr) * 2015-04-30 2016-11-16 MANN+HUMMEL GmbH Soupape combinée dotée de soupape de recirculation de gaz d'échappement basse pression et papillon d'admission d'air pour un moteur à combustion interne
EP3093478A1 (fr) * 2015-04-30 2016-11-16 MANN+HUMMEL GmbH Soupape combinée dotée d'une soupape de recirculation de gaz d'échappement basse pression et papillon d'admission d'air pour un moteur à combustion interne
CN107084055A (zh) * 2017-03-30 2017-08-22 宁波吉利罗佑发动机零部件有限公司 一种用于车辆发动机的节流阀装置

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EP1746280A2 (fr) * 2005-07-19 2007-01-24 Behr GmbH & Co. KG Système de soupape pour échangeur de chaleur
US20070256413A1 (en) * 2006-05-02 2007-11-08 Honeywell International, Inc. Variable geometry EGR mixer and system
US20080264038A1 (en) * 2007-04-30 2008-10-30 Caterpillar Inc. Exhaust treatment system having an acidic debris filter
DE102007033925A1 (de) * 2007-07-20 2009-01-22 Volkswagen Ag Abgasrückführeinrichtung

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JP4408554B2 (ja) * 2000-11-08 2010-02-03 本田技研工業株式会社 排気ガス還流系の状態判定装置
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WO2000028203A1 (fr) * 1998-11-09 2000-05-18 Stt Emtec Aktiebolag Procede et dispositif pour systeme de recirculation des gaz d'echappement et soupape associee, et procede et dispositif de regulation
EP1746280A2 (fr) * 2005-07-19 2007-01-24 Behr GmbH & Co. KG Système de soupape pour échangeur de chaleur
US20070256413A1 (en) * 2006-05-02 2007-11-08 Honeywell International, Inc. Variable geometry EGR mixer and system
US20080264038A1 (en) * 2007-04-30 2008-10-30 Caterpillar Inc. Exhaust treatment system having an acidic debris filter
DE102007033925A1 (de) * 2007-07-20 2009-01-22 Volkswagen Ag Abgasrückführeinrichtung

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20120135A1 (it) * 2012-03-15 2013-09-16 Magneti Marelli Spa Valvola a farfalla con diffusione anulare di gas di ricircolo per un condotto di aspirazione di un motore a combustione interna
CN104279089A (zh) * 2013-05-28 2015-01-14 福特汽车萨纳伊股份有限公司 排气再循环***
FR3007071A1 (fr) * 2013-06-17 2014-12-19 Peugeot Citroen Automobiles Sa Moteur thermique a actionneur commun pour vanne egr et vanne d'air
EP3093480A1 (fr) * 2015-04-30 2016-11-16 MANN+HUMMEL GmbH Soupape combinée dotée de soupape de recirculation de gaz d'échappement basse pression et papillon d'admission d'air pour un moteur à combustion interne
EP3093478A1 (fr) * 2015-04-30 2016-11-16 MANN+HUMMEL GmbH Soupape combinée dotée d'une soupape de recirculation de gaz d'échappement basse pression et papillon d'admission d'air pour un moteur à combustion interne
CN107084055A (zh) * 2017-03-30 2017-08-22 宁波吉利罗佑发动机零部件有限公司 一种用于车辆发动机的节流阀装置
CN107084055B (zh) * 2017-03-30 2020-03-31 宁波吉利罗佑发动机零部件有限公司 一种用于车辆发动机的节流阀装置

Also Published As

Publication number Publication date
DE102009041154A1 (de) 2011-03-24
EP2295781A3 (fr) 2013-12-25

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