EP2411641A1 - Motor vehicle exhaust system - Google Patents

Motor vehicle exhaust system

Info

Publication number
EP2411641A1
EP2411641A1 EP10709915A EP10709915A EP2411641A1 EP 2411641 A1 EP2411641 A1 EP 2411641A1 EP 10709915 A EP10709915 A EP 10709915A EP 10709915 A EP10709915 A EP 10709915A EP 2411641 A1 EP2411641 A1 EP 2411641A1
Authority
EP
European Patent Office
Prior art keywords
outlet
exchanger
exhaust
transverse
fixing
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.)
Granted
Application number
EP10709915A
Other languages
German (de)
French (fr)
Other versions
EP2411641B1 (en
Inventor
Etienne De Malet
Pascal Hottebart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP2411641A1 publication Critical patent/EP2411641A1/en
Application granted granted Critical
Publication of EP2411641B1 publication Critical patent/EP2411641B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • 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
    • F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • 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
    • F02M26/22—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
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of 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
    • F02M26/02—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

Definitions

  • the invention relates to a motor vehicle exhaust system.
  • the invention more particularly relates to a motor vehicle exhaust system comprising at least one depollution device, in particular a catalyst or a particulate filter, comprising a first output connected to an exhaust line of an associated vehicle and a second outlet for withdrawing exhaust gases for recycling, said second outlet being connected to an inlet duct of an exhaust gas cooling exchanger having an outlet duct connected to a housing receiving a valve exhaust gas control.
  • depollution device in particular a catalyst or a particulate filter
  • the housing receiving the exhaust gas control valve is generally attached to the engine block of the vehicle which is equipped by means of at least one stand and is connected to the outlet pipe of the exchanger cooling via a flexible conduit.
  • This design is relatively fragile because the vibrations to which the casing of the control valve is subjected and the high temperature induced by the proximity of the depollution device can lead to a degradation of the flexible duct, thus causing leaks detrimental to the proper functioning of the control valve. engine to the vehicle,
  • this design involves a relatively complex assembly, since it is necessary to first mount the exchanger on the pollution control member, then the housing of the control valve on the engine block, and finally to connect them by the flexible conduit.
  • the invention overcomes this disadvantage by proposing a simplified assembly in which the housing of the regulating valve is fixed directly to the heat exchanger body.
  • the invention proposes an exhaust circuit of the type described above, characterized in that the casing of the regulating valve comprises a soleplate intended to be fixed to an end plate of the outlet duct of the exchanger. and in that said housing is attached directly to a body of the exchanger.
  • the depollution member comprises a body of substantially axial orientation, a first end of which comprises an exhaust gas inlet duct, at least one side wall of which has the first transversally oriented outlet, and a second end of which comprises the second axial orientation outlet and at least one transverse fixing wall intended to receive the body of the exchanger, the body of the exchanger is substantially parallelepipedic, extends in the transverse direction, and comprises:
  • ⁇ a rear face from which protrudes the inlet duct, which is curved so as to extend below the lower horizontal face, and one end has a mating flange
  • a first transverse fixing face on the transverse wall for fixing the body of the depollution member comprising at least a first fixing lug on the transverse wall for fixing the body of the depollution device, ⁇ a second opposite transverse face from which project the cooling fluid inlet and outlet ducts,
  • an upper horizontal face comprising at least a second bracket bracket bracket on the transverse wall for attachment to the body of the pollution control device, a third leg bracket fixing the housing of the control valve, and the conduit of outlet of the exchanger, the second outlet of the depollution unit is connected to the inlet duct of the cooling exchanger via an intermediate elbow duct comprising an axially oriented soleplate intended to be coupled at the second outlet of the pollution control member and a transverse orientation soleplate intended to be coupled to the mating flange of the inlet duct of the exchanger.
  • FIG. 1 is an exploded perspective view of a circuit according to a prior art
  • FIG. 2 is an overall perspective view of a circuit according to a prior art
  • FIG. 3 is a view is an exploded perspective view of a circuit according to the invention
  • FIG. 4 is a view is an overall perspective view of a circuit according to the invention.
  • FIG. 1 shows the assembly of a conventional exhaust circuit of a motor vehicle.
  • the circuit 10 is for example intended to be associated with a motor (not shown) of a motor vehicle.
  • the circuit 10 comprises at least one depollution member 12, in particular a catalyst or a particulate filter, comprising an exhaust gas inlet duct 14, a first outlet 18 connected to an exhaust line (no shown) of an associated vehicle and a second outlet 18 for withdrawing exhaust gases for recycling.
  • the second outlet 18 is connected via an intermediate duct 20 to an inlet duct 22 of an exchanger 24 for cooling the exhaust gases.
  • An outlet pipe 28 of exchanger 24 is connected to a housing 28 receiving an exhaust gas control valve via a flexible pipe 27,
  • the flexible duct 27 comprises, for example, a clamping collar 30 on the outlet duct 26 and a soleplate 32 for fixing it to a soleplate 34 to the casing 28 of the control valve.
  • the casing 28 of the control valve is fixed by the intermediate of the screws 38 on a stand 38 intended to be fixed on the engine of the vehicle,
  • the vibrations to which the casing 28 of the control valve is subjected, cantilevered at the end of the stand 38 and the high temperature induced by the proximity of the depollution member 12 can lead to a degradation of the duct flexible 27. This degradation, may cause leaks or the introduction of air detrimental to the proper functioning of the exhaust gas recirculation, thus disrupting the operation of the engine of the vehicle.
  • this design implies a complex constraining assembly, since it is necessary to first mount the exchange 24 on the 12 depollution member, then the housing 28 the control valve on the stand 38 and the stand 38 on the engine block, and finally to connect them through the flexible conduit 27.
  • the invention overcomes this disadvantage by proposing a simplified assembly in which the housing 28 of the regulating valve is fixed directly on the body 40 of the exchanger 24.
  • the invention proposes an exhaust circuit of the type described above, characterized in that the housing 28 of the regulation valve comprises a soleplate 34 intended to be fixed to a end plate 42 of the outlet duct 26 of the exchanger 24 and in that said casing 28 is fixed directly on a body 40 of the exchanger 24.
  • the body 40 of the exchange is attached to the body 12 of pollution.
  • a 12 depollution comprises a body 42 of substantially axial orientation and in particular substantially cylindrical, a first end 44 comprises the conduit 14 for entering the exhaust gas, at least one side wall 48 has the first outlet 16 of transverse orientation , and a second end 48 has the second outlet 16 of axial orientation and at least one transverse wall 50 for fixing to receive the body 40 of the exchanger.
  • the body 40 of the exchanger 24 is substantially parallelepipedal and extends in the transverse direction.
  • the body 40 of the exchanger 24 comprises in particular a horizontal face 52 below. It also comprises a rear face 54 from which protrudes the inlet duct 22, which is curved so as to extend below the lower horizontal face, and one end of which has a mating flange 56 for connection with The second exit 18 of the depollution unit.
  • the body 40 of the exchanger 24 also has a first transverse face for fixing on the transverse wall for fixing the body of the depollution member, comprising at least a first fixing lug 58 on the transverse wall 50 for fixing the body of the body 24 depollution.
  • Coolant inlet and outlet ducts 80 project from a second opposite transverse face 64. These ducts 60, 62 are intended to be connected to a cooling system of the vehicle to ensure the cooling of the gases. exhaust.
  • the body 40 of the exchanger 24 has an upper horizontal face 66, comprising at least one second tab 88 at the angle of attachment to the transverse wall for fixing the body of the depollution device, a third tab 70 at the angle of attachment. the casing of the regulating valve, and the outlet duct 28 of the exchanger 24.
  • the second outlet 16 of the depollution member 24 is connected to the inlet duct 22 of the cooling exchanger via an intermediate duct 72 with a duct.
  • insole of axial orientation 74 intended to be coupled to the second outlet 18 of the pollution control member and a sole 76 of transverse orientation intended to be coupled to the soleplate
  • the intermediate duct 72 is fixed on the depollution member 12, then the exchanger 24 is fixed on the intermediate duct 22 and the exchanger 24 is then fixed on the depollution member 12. Finally, the housing 28 of the control valve is fixed on the exchanger 24.
  • the invention greatly simplifies the mounting of an exhaust gas recirculation circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The invention relates to a motor vehicle exhaust system (10), comprising at least one pollutant-removing member (12), particularly a catalytic converter or a particle filter, comprising a first outlet (16) and connected to an exhaust line of an associated vehicle, and a second outlet (18) for collecting exhaust gases with a view to recycling same, said second outlet (18) being connected to an inlet pipe (22) of an exchanger (24) for cooling exhaust gases, an outlet pipe (26) of which is connected to a housing (28) that receives a valve for controlling exhaust gases, characterized in that the housing (28) of the control valve comprises a sole plate (34) to be attached to an end sole plate (32) of the outlet pipe (26) of the exchanger (24), and in that said housing (28) is attached directly onto a body (40) of the exchanger (24).

Description

"Circuit d'échappement de véhicule automobile" "Motor vehicle exhaust system"
L'invention concerne un circuit d'échappement de véhicule automobile.The invention relates to a motor vehicle exhaust system.
L'Invention concerne plus particulièrement un circuit d'échappement de véhicule automobile comportant au moins un organe de dépollution, notamment un catalyseur ou un filtre à particules, comportant un première sortie reliée à une ligne d'échappement d'un véhicule associé et une seconde sortie destinée à prélever des gaz d'échappements en vue de leur recyclage, ladite seconde sortie étant reliée à un conduit d'entrée d'un échangeur de refroidissement des gaz d'échappement dont un conduit de sortie est relié à un boîtier recevant une vanne de régulation des gaz d'échappement.The invention more particularly relates to a motor vehicle exhaust system comprising at least one depollution device, in particular a catalyst or a particulate filter, comprising a first output connected to an exhaust line of an associated vehicle and a second outlet for withdrawing exhaust gases for recycling, said second outlet being connected to an inlet duct of an exhaust gas cooling exchanger having an outlet duct connected to a housing receiving a valve exhaust gas control.
On connaît de nombreux exemples de circuits d'échappement de ce type.Many examples of exhaust circuits of this type are known.
Dans un tel circuit, le boîtier recevant la vanne de régulation des gaz d'échappement est généralement fixé au bloc moteur du véhicule qui en est équipé par l'intermédiaire d'au moins une béquille et est relié au conduit de sortie de l'échangeur de refroidissement par l'intermédiaire d'un conduit flexible.In such a circuit, the housing receiving the exhaust gas control valve is generally attached to the engine block of the vehicle which is equipped by means of at least one stand and is connected to the outlet pipe of the exchanger cooling via a flexible conduit.
Cette conception est relativement fragile car les vibrations auxquelles est soumis le boîtier de la vanne de régulation et la température élevée induite par la proximité de l'organe de dépollution peuvent conduire à une dégradation du conduit flexible, occasionnant alors des fuites préjudiciables au bon fonctionnement du moteur au véhicule,This design is relatively fragile because the vibrations to which the casing of the control valve is subjected and the high temperature induced by the proximity of the depollution device can lead to a degradation of the flexible duct, thus causing leaks detrimental to the proper functioning of the control valve. engine to the vehicle,
Par ailleurs cette conception implique un montage relativement complexe, puisqu'il est nécessaire de monter d'abord l'échangeur sur l'organe de dépollution, puis le boîtier de la vanne de régulation sur le bloc moteur, et enfin de les relier par le conduit flexible. L'invention remédie à cet inconvénient en proposant υn montage simplifié dans leqυel le boîtier de la vanne de régulation est fixé directement sur le corps de réchangeur.Furthermore, this design involves a relatively complex assembly, since it is necessary to first mount the exchanger on the pollution control member, then the housing of the control valve on the engine block, and finally to connect them by the flexible conduit. The invention overcomes this disadvantage by proposing a simplified assembly in which the housing of the regulating valve is fixed directly to the heat exchanger body.
Dans ce but, l'invention propose un circuit d'échappement du type décrit précédemment, caractérisé en ce que le boîtier de la vanne de régulation comporte une semelle destinée à être fixée à une semelle d'extrémité du conduit de sortie de l'échangeur et en ce que ledit boîtier est fixé directement sur un corps de I'échangeur. Selon d'autres caractéristiques de l'invention :For this purpose, the invention proposes an exhaust circuit of the type described above, characterized in that the casing of the regulating valve comprises a soleplate intended to be fixed to an end plate of the outlet duct of the exchanger. and in that said housing is attached directly to a body of the exchanger. According to other features of the invention:
~ le corps de I'échangeur est fixé sur l'organe de dépollution,~ the body of the exchanger is fixed on the depollution device,
- l'organe de dépollution comporte un corps d'orientation sensiblement axiale dont une première extrémité comporte un conduit d'entrée des gaz d'échappement, dont au moins une paroi latérale comporte la première sortie d'orientation transversale, et dont une seconde extrémité comporte la seconde sortie d'orientation axiale et au moins une paroi transversale de fixation destinée à recevoir le corps de l'échangeur, - le corps de l'échangeur est sensiblement parallélépipé- dique, s'étend suivant la direction transversale, et comporte :the depollution member comprises a body of substantially axial orientation, a first end of which comprises an exhaust gas inlet duct, at least one side wall of which has the first transversally oriented outlet, and a second end of which comprises the second axial orientation outlet and at least one transverse fixing wall intended to receive the body of the exchanger, the body of the exchanger is substantially parallelepipedic, extends in the transverse direction, and comprises:
● une face horizontale inférieure,● a lower horizontal face,
● une face arrière à partir de laquelle fait saillie le conduit d'entrée, qui est recourbé de manière à s'étendre sous la face horizontale inférieure, et dont une extrémité comporte une semelle d'accouplement,● a rear face from which protrudes the inlet duct, which is curved so as to extend below the lower horizontal face, and one end has a mating flange,
● unu première face transversale de fixation sur la paroi transversale de fixation du corps de l'organe de dépollution, comportant au moins une première patte de fixation sur la paroi transversale de fixation du corps de l'organe de dépollution, ● une seconde face transversale opposée à partir de laquelle font saillie des conduits d'entrée et de sortie de fluide de refroidissement,A first transverse fixing face on the transverse wall for fixing the body of the depollution member, comprising at least a first fixing lug on the transverse wall for fixing the body of the depollution device, ● a second opposite transverse face from which project the cooling fluid inlet and outlet ducts,
● une face horizontale supérieure, comportant au moins une seconde patte en équerre de fixation sur la paroi transversale de fixation au corps de l'organe de dépollution, une troisième patte en équerre de fixation du boîtier de la vanne de régulation , et le conduit de sortie de l'échangeur, - la seconde sortie de l'organe de dépollution est reliée au conduit d'entrée de l'échangeur de refroidissement par l'intermédiaire d'un conduit intermédiaire coudé comportant une semelle d'orientation axiale destinée à être accouplée à la seconde sortie de l'organe de dépollution et une semelle d'orientation transversale destinée à être accouplée à la semelle d'accouplement du conduit d'entrée de l'échangeur.● an upper horizontal face, comprising at least a second bracket bracket bracket on the transverse wall for attachment to the body of the pollution control device, a third leg bracket fixing the housing of the control valve, and the conduit of outlet of the exchanger, the second outlet of the depollution unit is connected to the inlet duct of the cooling exchanger via an intermediate elbow duct comprising an axially oriented soleplate intended to be coupled at the second outlet of the pollution control member and a transverse orientation soleplate intended to be coupled to the mating flange of the inlet duct of the exchanger.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :Other features and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
~ la figure 1 est une vue d'ensemble en perspective éclatée d'un circuit selon un état antérieur de la technique ;~ Figure 1 is an exploded perspective view of a circuit according to a prior art;
~ la figure 2 est une vue d'ensemble en perspective assemblée d'un circuit selon un état antérieur de la technique ; - la figure 3 est une vue est une vue d'ensemble en perspective éclatée d'un circuit selon l'invention,FIG. 2 is an overall perspective view of a circuit according to a prior art; FIG. 3 is a view is an exploded perspective view of a circuit according to the invention,
~ la figure 4 est une vue est une vue d'ensemble en perspective assemblée d'un circuit selon l'invention,FIG. 4 is a view is an overall perspective view of a circuit according to the invention,
Dans la description qui va suivre, des chiffres de référence identiques désignent des pièces identiques ou ayant des fonctions similaires,In the following description, identical reference numerals designate parts that are identical or have similar functions.
On a représenté sur la figure 1 l'ensemble d'un circuit 10 conventionnel d'échappement de véhicule automobile. Le circuit 10 est par exemple destiné à être associé à un moteur (non représenté) d'un véhicule automobile.FIG. 1 shows the assembly of a conventional exhaust circuit of a motor vehicle. The circuit 10 is for example intended to be associated with a motor (not shown) of a motor vehicle.
De manière connue le circuit 10 comporte au moins un organe 12 de dépollution, notamment un catalyseur ou un filtre à particules, comportant un conduit 14 d'entrée des gaz d'échappement, une première sortie 18 reliée à une ligne d'échappement (non représentée) d'un véhicule associé et une seconde sortie 18 destinée à prélever des gaz d'échappements en vue de leur recyclage. La seconde sortie 18 est reliée par l'intermédiaire d'un conduit intermédiaire 20 à un conduit d'entrée 22 d'un échangeur 24 de refroidissement des gaz d'échappement. Un conduit de sortie 28 de réchangeur 24 est relié à un boîtier 28 recevant une vanne de régulation des gaz d'échappement par l'intermédiaire d'un conduit flexible 27,In known manner the circuit 10 comprises at least one depollution member 12, in particular a catalyst or a particulate filter, comprising an exhaust gas inlet duct 14, a first outlet 18 connected to an exhaust line (no shown) of an associated vehicle and a second outlet 18 for withdrawing exhaust gases for recycling. The second outlet 18 is connected via an intermediate duct 20 to an inlet duct 22 of an exchanger 24 for cooling the exhaust gases. An outlet pipe 28 of exchanger 24 is connected to a housing 28 receiving an exhaust gas control valve via a flexible pipe 27,
Le conduit flexible 27 comporte par exemple un collier de fixation 30 sur le conduit de sortie 26 et une semelle 32 pour sa fixation sur une semelle 34 au boîtier 28 de la vanne de régulation, Le boîtier 28 de ia vanne de régulation est fixé par l'intermédiaire des vis 38 sur une béquille 38 destiné à être fixée sur le moteur du véhicule,The flexible duct 27 comprises, for example, a clamping collar 30 on the outlet duct 26 and a soleplate 32 for fixing it to a soleplate 34 to the casing 28 of the control valve. The casing 28 of the control valve is fixed by the intermediate of the screws 38 on a stand 38 intended to be fixed on the engine of the vehicle,
Selon cette conception, les vibrations auxquelles est soumis le boîtier 28 de la vanne de régulation, en porte à faux au bout de la béquille 38 et ia température élevée induite par la proximité de l'organe 12 de dépollυtion peuvent conduire à une dégradation du conduit flexible 27. Cette dégradation, peut occasionner des fuites ou l'introduction d'air préjudiciables au bon fonctionnement du recyclage des gaz d'échappement, perturbant alors le fonctionnement du moteur du véhicule.According to this design, the vibrations to which the casing 28 of the control valve is subjected, cantilevered at the end of the stand 38 and the high temperature induced by the proximity of the depollution member 12 can lead to a degradation of the duct flexible 27. This degradation, may cause leaks or the introduction of air detrimental to the proper functioning of the exhaust gas recirculation, thus disrupting the operation of the engine of the vehicle.
Par ailleurs cette conception implique un montage contraignant complexe, puisqu'il est nécessaire de monter d'abord l'échangeυr 24 sur l'organe 12 de dépollution, puis le boîtier 28 de la vanne de régulation sur la béquille 38 et la béquille 38 sur le bloc moteur, et enfin de les relier par le conduit flexible 27.Moreover, this design implies a complex constraining assembly, since it is necessary to first mount the exchange 24 on the 12 depollution member, then the housing 28 the control valve on the stand 38 and the stand 38 on the engine block, and finally to connect them through the flexible conduit 27.
L'invention remédie à cet inconvénient en proposant un montage simplifié dans lequel le boîtier 28 de la vanne de régulation est fixé directement sur le corps 40 de l'échangeur 24.The invention overcomes this disadvantage by proposing a simplified assembly in which the housing 28 of the regulating valve is fixed directly on the body 40 of the exchanger 24.
Dans ce but, comme l'illustrent les figures 3 et 4, l'invention propose un circuit d'échappement du type décrit précédemment, caractérisé en ce que le boîtier 28 de la vanne de régulation comporte une semelle 34 destinée à être fixée à une semelle d'extrémité 42 du conduit 26 de sortie de l'échangeur 24 et en ce que ledit boîtier 28 est fixé directement sur un corps 40 de l'échangeur 24.For this purpose, as illustrated in FIGS. 3 and 4, the invention proposes an exhaust circuit of the type described above, characterized in that the housing 28 of the regulation valve comprises a soleplate 34 intended to be fixed to a end plate 42 of the outlet duct 26 of the exchanger 24 and in that said casing 28 is fixed directly on a body 40 of the exchanger 24.
Avantageusement, le corps 40 de l'échangeυr est fixé sur l'organe 12 de dépollution. Dans le mode de réalisation préféré de l'invention, l'organeAdvantageously, the body 40 of the exchange is attached to the body 12 of pollution. In the preferred embodiment of the invention, the organ
12 de dépollution comporte un corps 42 d'orientation sensiblement axiale et notamment sensiblement cylindrique dont une première extrémité 44 comporte le conduit 14 d'entrée des gaz d'échappement, dont au moins une paroi latérale 48 comporte la première sortie 16 d'orientation transversale, et dont une seconde extrémité 48 comporte la seconde sortie 16 d'orientation axiale et au moins une paroi transversale 50 de fixation destinée à recevoir le corps 40 de l'échangeur.12 depollution comprises a body 42 of substantially axial orientation and in particular substantially cylindrical, a first end 44 comprises the conduit 14 for entering the exhaust gas, at least one side wall 48 has the first outlet 16 of transverse orientation , and a second end 48 has the second outlet 16 of axial orientation and at least one transverse wall 50 for fixing to receive the body 40 of the exchanger.
Complémentairement, le corps 40 de l'échangeur 24 est sensiblement parallélépipédique et s'étend suivant la direction transversale.Complementarily, the body 40 of the exchanger 24 is substantially parallelepipedal and extends in the transverse direction.
Le corps 40 de l'échangeur 24 comporte notamment une face horizontale 52 inférieure. Il comporte aussi une face arrière 54 à partie de laquelle fait saillie le conduit d'entrée 22, qui est recourbé de manière à s'étendre sous la face horizontale inférieure, et dont une extrémité comporte une semelle 56 d'accouplement permettant la liaison avec Ia seconde sortie 18 de l'organe de dépollυtion . La corps 40 de l'échangeur 24 comporte aussi une première face transversale de fixation sur la paroi transversale de fixation du corps de l'organe de dépollution, comportant au moins une première patte 58 de fixation sur la paroi transversale 50 de fixation du corps de l'organe 24 de dépollution.The body 40 of the exchanger 24 comprises in particular a horizontal face 52 below. It also comprises a rear face 54 from which protrudes the inlet duct 22, which is curved so as to extend below the lower horizontal face, and one end of which has a mating flange 56 for connection with The second exit 18 of the depollution unit. The body 40 of the exchanger 24 also has a first transverse face for fixing on the transverse wall for fixing the body of the depollution member, comprising at least a first fixing lug 58 on the transverse wall 50 for fixing the body of the the body 24 depollution.
Des conduits d'entrée 80 et de sortie 62 de fluide de refroidissement font saillie à partir d'une seconde face transversale opposée 64. Ces conduits 60, 62 sont destinés à être reliés à un circuit de refroidissement du véhicule pour assurer le refroidissement des gaz d'échappement.Coolant inlet and outlet ducts 80 project from a second opposite transverse face 64. These ducts 60, 62 are intended to be connected to a cooling system of the vehicle to ensure the cooling of the gases. exhaust.
Enfin le corps 40 de I'échangeur 24 comporte une face horizontale supérieure 66, comportant au moins une seconde patte 88 en équerre de fixation sur la paroi transversale de fixation du corps de l'organe de dépollution, une troisième patte 70 en équerre de fixation du boîtier de la vanne de régulation, et le conduit 28 de sortie de l'échangeur 24.Finally, the body 40 of the exchanger 24 has an upper horizontal face 66, comprising at least one second tab 88 at the angle of attachment to the transverse wall for fixing the body of the depollution device, a third tab 70 at the angle of attachment. the casing of the regulating valve, and the outlet duct 28 of the exchanger 24.
Dans le mode de réalisation préféré de l'invention, la seconde sortie 16 de l'organe 24 de dépollution est reliée au conduit d'entrée 22 de l'échangeur de refroidissement par l'interméd iaire d'un conduit intermédiaire coudé 72 comportant une semelle d'orientation axiale 74 destinée à être accouplée à la seconde sortie 18 de l'organe de dépollution et une semelle 76 d'orientation transversale destinée à être accouplée à la semelleIn the preferred embodiment of the invention, the second outlet 16 of the depollution member 24 is connected to the inlet duct 22 of the cooling exchanger via an intermediate duct 72 with a duct. insole of axial orientation 74 intended to be coupled to the second outlet 18 of the pollution control member and a sole 76 of transverse orientation intended to be coupled to the soleplate
56 d'accouplement ou conduit d'entrée 22 de I'échangeur 24. Dans cette configuration, le montage s'effectue de la manière suivante :56 in this configuration, the assembly is carried out as follows:
- le conduit intermédiaire 72 est fixé sur l'organe 12 de dépollυtlon, puis l'échangeur 24 est fixé sur le conduit intermédiaire 22 et on fixe alors l'échangeur 24 sur l'organe 12 de dépollution. Enfin le boîtier 28 de la vanne de régulation est fixé sur l'échangeur 24.the intermediate duct 72 is fixed on the depollution member 12, then the exchanger 24 is fixed on the intermediate duct 22 and the exchanger 24 is then fixed on the depollution member 12. Finally, the housing 28 of the control valve is fixed on the exchanger 24.
L'invention permet de simplifier considérablement le montage d'un circuit de recyclage des gaz d'échappement. The invention greatly simplifies the mounting of an exhaust gas recirculation circuit.

Claims

REVENDICATIOINS REVENDICATIOINS
1. Circuit (10) d'échappement de véhicule automobile comportant au moins un organe (12) de dépollution, notamment un catalyseur ou un filtre à particules, comportant un première sortie (18) reliée à une ligne d'échappement d'un véhicule associé et une seconde sortie (18) destinée à prélever des gaz d'échappements en vue de leur recyclage, ladite seconde sortie (18) étant reliée à un conduit d'entrée (22) d'un échangeυr (24) de refroidissement des gaz d'échappement dont un conduit (26) de sortie est relié à un boîtier (28) recevant une vanne de régulation des gaz d'échappement, caractérisé en ce que Ie boîtier (28) de la vanne de régulation comporte une semelle (34) destinée à être fixée à une semelle (32) d'extrémité du conduit (26) de sortie de l'échangeur (24) et en ce que ledit boîtier (28) est fixé directement sur un corps (40) de l'échangeυr (24).Motor vehicle exhaust circuit (10) comprising at least one depollution element (12), in particular a catalyst or a particulate filter, having a first outlet (18) connected to an exhaust line of a vehicle associated and a second outlet (18) for withdrawing exhaust gases for recycling, said second outlet (18) being connected to an inlet duct (22) of an exchange (24) for cooling the gases exhaust pipe having an outlet pipe (26) connected to a housing (28) receiving an exhaust gas control valve, characterized in that the housing (28) of the control valve comprises a sole (34) intended to be fixed to an end plate (32) of the outlet duct (26) of the heat exchanger (24) and in that said casing (28) is fixed directly on a body (40) of the exchange ( 24).
2. Circuit (10) d'échappement selon la revendication précédente, caractérisé en ce que le corps (40) de I'échangeur (24) est fixé sur l'organe (12) de dépollution. 2. Exhaust circuit (10) according to the preceding claim, characterized in that the body (40) of the exchanger (24) is fixed on the body (12) of pollution control.
3. Circuit (10) d'échappement selon la revendication précédente, caractérisé en ce que l'organe (12) de dépollution comporte un corps (42) d'orientation sensiblement axiale dont une première extrémité (44) comporte un conduit d'entrée (14) des gaz d'échappement, dont au moins une paroi latérale (48) comporte la première sortie (18) d'orientation transversale, et dont une seconde extrémité (48) comporte la seconde sortie (16) d'orientation axiale et au moins une paroi transversale (50) de fixation destinée à recevoir le corps (14) de l'échangeur,3. Exhaust circuit (10) according to the preceding claim, characterized in that the member (12) of pollution control comprises a body (42) of substantially axial orientation, a first end (44) comprises an inlet duct (14) exhaust gas, at least one side wall (48) of which has the first transverse orientation outlet (18), and a second end (48) of which has the second axial orientation outlet (16) and at least one transverse wall (50) for fixing to receive the body (14) of the exchanger,
4. Circuit (10) d'échappement selon la revendication précédente, caractérisé en ce que le corps (40) de I'échangeur (24) est sensiblement parallélépipédique, s'étend suivant la direction transversale, et comporte ;4. Circuit (10) exhaust according to the preceding claim, characterized in that the body (40) of the exchanger (24) is substantially parallelepiped, extends in the transverse direction, and comprises;
~ une face horizontale (52) inférieure, - une face arrière (54) à partie de laquelle fait saillie le conduit d'entrée (22), qui est recourbé de manière à s'étendre sous la face horizontale inférieure (52), et dont une extrémité comporte une semelle (58) d'accouplement, - une première face transversale de fixation sur la paroi transversale de fixation du corps de l'organe de dépollution, comportant au moins une première patte (58) de fixation sur la paroi (50) transversale de fixation du corps (42) de l'organe (24) de dépollution, - une seconde face (64) transversale opposée à partir de laquelle font saillie des conduits d'entrée (80) et de sortie (62) de fluide de refroidissement,~ a horizontal face (52) lower, a rear face (54) from which protrudes the inlet duct (22), which is curved so as to extend under the lower horizontal face (52), and one end of which comprises a sole (58); coupling, - a first transverse face of attachment to the transverse wall for fixing the body of the pollution control member, comprising at least a first lug (58) for fixing on the transverse wall (50) for fixing the body (42 ) of the depollution member (24), - a second opposite transverse face (64) from which the cooling fluid inlet (80) and outlet (62) outlets project,
- une face horizontale supérieure (66), comportant au moins une seconde patte (88) en éqυerre de fixation sur la paroi transversale (50) de fixation du corps de l'organe (24) de dépollution, une troisième patte (70) en éqυerre de fixation du boîtier (28) de la vanne de régulation, et le conduit (22) de sortie de réchangeur (24).- an upper horizontal face (66), comprising at least a second lug (88) in attachment eyelet on the transverse wall (50) for fixing the body of the body (24) depollution, a third leg (70) in fastening plate of the regulating valve housing (28), and the exchanger outlet conduit (22) (24).
5. Circuit (10) d'échappement selon la revendication précédente, caractérisé en ce que la seconde sortie (16) de l'organe (24) de dépollution est reliée au conduit d'entrée de l'échangeur de refroidissement par l'Intermédiaire d'un conduit intermédiaire (72) coudé comportant une semelle d'orientation axiale (74) destinée à être accouplée à la seconde sortie (18) de l'organe (24) de dépollution et une semelle (76) d'orientation transversale destinée à être accouplée à la semelle (58) d'accouplement du conduit d'entrée (22) de l'échangeur (24). 5. Circuit (10) exhaust according to the preceding claim, characterized in that the second outlet (16) of the member (24) for pollution control is connected to the inlet duct of the cooling exchanger by the Intermediate an angled intermediate duct (72) having an axially oriented sole (74) to be coupled to the second outlet (18) of the depollution member (24) and a transversely oriented sole (76) for to be coupled to the mating flange (58) of the inlet duct (22) of the exchanger (24).
EP10709915A 2009-03-23 2010-02-26 Motor vehicle exhaust system Not-in-force EP2411641B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0951819A FR2943384B1 (en) 2009-03-23 2009-03-23 EXHAUST CIRCUIT FOR MOTOR VEHICLE
PCT/FR2010/050339 WO2010109104A1 (en) 2009-03-23 2010-02-26 Motor vehicle exhaust system

Publications (2)

Publication Number Publication Date
EP2411641A1 true EP2411641A1 (en) 2012-02-01
EP2411641B1 EP2411641B1 (en) 2012-11-28

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EP10709915A Not-in-force EP2411641B1 (en) 2009-03-23 2010-02-26 Motor vehicle exhaust system

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US (1) US8769930B2 (en)
EP (1) EP2411641B1 (en)
FR (1) FR2943384B1 (en)
WO (1) WO2010109104A1 (en)

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Also Published As

Publication number Publication date
US20120301364A1 (en) 2012-11-29
FR2943384B1 (en) 2011-03-04
EP2411641B1 (en) 2012-11-28
FR2943384A1 (en) 2010-09-24
US8769930B2 (en) 2014-07-08
WO2010109104A1 (en) 2010-09-30

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