EP1875061B1 - Dispositif de recyclage des gaz d'echappement - Google Patents

Dispositif de recyclage des gaz d'echappement Download PDF

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Publication number
EP1875061B1
EP1875061B1 EP06722588A EP06722588A EP1875061B1 EP 1875061 B1 EP1875061 B1 EP 1875061B1 EP 06722588 A EP06722588 A EP 06722588A EP 06722588 A EP06722588 A EP 06722588A EP 1875061 B1 EP1875061 B1 EP 1875061B1
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EP
European Patent Office
Prior art keywords
exhaust gas
gas recirculation
fresh air
line
sleeve
Prior art date
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Active
Application number
EP06722588A
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German (de)
English (en)
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EP1875061A1 (fr
Inventor
Ulrich Bischofberger
Rafael Weisz
Andreas GRÜNER
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.)
Mahle International GmbH
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Mahle International GmbH
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Publication of EP1875061A1 publication Critical patent/EP1875061A1/fr
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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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10118—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements with variable cross-sections of intake ducts along their length; Venturis; Diffusers
    • 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
    • F02M26/17—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
    • F02M26/21—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 with EGR valves located at or near the connection 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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission

Definitions

  • the present invention relates to an exhaust gas recirculation device for an internal combustion engine, in particular in a motor vehicle, having the features of the preamble of claim 1.
  • Such an exhaust gas recirculation device which is equipped with an exhaust gas recirculation line for introducing exhaust gas into a fresh air line of the internal combustion engine. Furthermore, an exhaust gas recirculation valve is provided for controlling the exhaust gas recirculation line.
  • the exhaust gas recirculation line has an end portion that extends within the fresh air line and has an axially open orifice. The exhaust gas recirculation line thus penetrates an envelope of the fresh air line in order to be able to introduce the recirculated exhaust gases into the fresh air line.
  • the exhaust gas recirculation line comprises a tube axially adjustably mounted relative to the fresh air line, which has the outlet opening on the outlet side and an inlet opening on the inlet side, and a feed section which is connected to a connection space in which the inlet opening is also located of the pipe is located.
  • the exhaust gas recirculation valve comprises an adjusting device with the aid of which the pipe between an open position, in which the inlet opening is axially spaced from a valve seat, and a closed position is adjustable, in which the tube rests with its inlet opening sealingly on the valve seat.
  • the recirculation rate can be adjusted by changing the distance between the valve seat and the inlet opening of the pipe.
  • the pipe is exposed to the recirculated exhaust gases in the area of its inlet opening.
  • an actuator via which the adjusting device axially drives the pipe, exposed to the recirculated exhaust gases.
  • the components of the exhaust gas recirculation device exposed to the exhaust gas can become sooty or gassed. This can lead to a stiffness and in extreme cases to a seizing of the exhaust gas recirculation valve, whereby a proper function of the exhaust gas recirculation device is at risk.
  • the exhaust gas recirculation valve also has a arranged in the fresh air pipe sleeve which surrounds the at least one exhaust gas recirculation line in the region of the mouth opening, which is mounted axially adjustable in the fresh air line and which radially inside a nozzle contour with a first decreasing in the flow direction and then increasing Has flow cross-section.
  • the exhaust gas recirculation valve is equipped with an adjusting device for axial adjustment of the sleeve relative to the fresh air line.
  • the invention is concerned with the problem of providing an improved embodiment for an exhaust gas recirculation device of the type mentioned, which is characterized in particular by the fact that the exhaust gas recirculation rate can be better adjusted.
  • the invention is based on the general idea to aerodynamically control the return rate by means of a nozzle.
  • the control of the return rate is effected by the axial relative position between the orifice and the nozzle, since the pressure prevailing in the orifice depends on the axial position of the orifice within the nozzle.
  • This control principle is combined with the invention in that the end portion having the mouth opening is arranged stationary within the fresh air line, while a sleeve having or forming the nozzle is arranged adjustably in the fresh air line. As a result, the exhaust gas flow reaches unhindered to the mouth opening, without affecting moving parts.
  • the sleeve with a Adjustment to adjust without causing the actuator is acted upon by the recirculated exhaust gases.
  • This design reduces the risk of sooting or sooting of components of the exhaust gas recirculation device, since contact with the recirculated exhaust gases is largely avoided.
  • the introduction of the exhaust gases takes place in the fresh air flow in the region of the nozzle, ie in a range of increased flow velocities.
  • higher flow rates reduce the risk of sooting and sooting.
  • At least one closure body preferably coaxially with the mouth opening, is arranged on the sleeve and, with the mouth maximally upstream, with the mouth opening for adjusting a minimum opening cross-section of the at least one exhaust gas recirculation line cooperates.
  • the return rate can be controlled within limits that can not be controlled aerodynamically, mechanically.
  • a return rate with the value zero can be set in the limiting case. That is, the exhaust gas recirculation line can be blocked by the closure body closes the mouth opening.
  • the adjusting device by means of which the sleeve can be adjusted axially relative to the fresh air line, be equipped with at least one electromagnetic actuator, which can adjust the sleeve axially by means of electromagnetic forces.
  • the actuator omitted moving components, also reduces the risk of sooting or sooting of components of the actuator.
  • Fig. 1 to 9 includes an exhaust gas recirculation device 1 according to the invention at least one exhaust gas recirculation line 2 and an exhaust gas recirculation valve 3.
  • exhaust gas recirculation is abbreviated below with AGR.
  • the exhaust gas recirculation device 1 or the EGR device 1 is used in an internal combustion engine, not shown here, to return a portion of the exhaust gases that arise during operation of the internal combustion engine to the fresh air side of the internal combustion engine.
  • motor vehicles are equipped with internal combustion engines, which have an EGR device 1.
  • a fresh air line 4 of the internal combustion engine which serves to supply the cylinders or the combustion chambers of the internal combustion engine fresh air.
  • a corresponding fresh air flow is indicated by arrows 5.
  • the EGR line 2 serves to introduce exhaust gas into the fresh air line 4.
  • a corresponding exhaust gas flow is indicated by arrows 6.
  • the EGR line 2 has an end section 7 which has an axially open orifice 8, which is expediently open in the flow direction of the fresh air flow 5. Furthermore, the end section 7 extends within the fresh air line 4.
  • the EGR line 2 is passed through a shell 9 of the fresh air line 4.
  • the fresh air duct 4 may preferably extend in a straight line in the region in which the EGR duct 2 is inserted therein.
  • the EGR line 2 can be controlled. That is, the amount of recirculated exhaust gases, that is, the EGR rate can be adjusted by means of the EGR valve 3.
  • the EGR valve 3 has a sleeve 10.
  • the sleeve 10 is arranged in the interior of the fresh air line 4, in such a way that it encloses the EGR line 2 or its end section 7 in the area of the mouth opening 8.
  • the sleeve 10 is provided with a nozzle contour 11 on its inner side facing the mouth opening 8, ie radially inward.
  • This nozzle contour 11 is characterized in that it has a flow cross-section which first decreases in the flow direction of the fresh air flow 5 and then increases again.
  • an inflow-side axial section of the nozzle contour 11 with the decreasing flow cross-section is axially shorter than an outflow-side axial section with the increasing flow cross-section.
  • the inflow-side axial section is approximately half the size of the outflow-side axial section.
  • the nozzle contour 11 is designed as a Venturi nozzle, that is, the cross-sectional profile within the nozzle contour 11 is selected so that forms a Venturi nozzle.
  • the sleeve 10 is arranged axially adjustable relative to the fresh air line 4 and is preferably mounted axially adjustable for this purpose on the fresh air line 4.
  • the EGR valve 3 comprises an adjusting device 12, by means of which the sleeve 10 can be adjusted relative to the fresh air line 4. Due to the adjustability of the sleeve 10, the relative position of the mouth opening 8 can be adjusted within the nozzle contour 11. As the nozzle contour 11 flows through, the pressure prevailing in the fresh air flow 5 changes, with the current pressure value depending on the current position within the nozzle contour 11. Accordingly, the pressure prevailing at the outlet opening 8 pressure can be varied by adjusting the relative position between the mouth opening 8 and sleeve 10. However, the pressure prevailing at the orifice 8 also correlates the amount of recirculated exhaust gases, that is, the EGR rate. Ultimately, therefore, by positioning the sleeve 10 relative to the orifice 8, the EGR rate can be adjusted.
  • the EGR valve 3 is also equipped with at least one closure body 13, which is arranged stationary with respect to the sleeve 10.
  • This closure body 13 is positioned coaxially with the mouth opening 8. In an adjustment of the sleeve 10 against the fresh air flow 5, the closure body 13 approaches the mouth opening 8 at. At maximum upstream adjusted sleeve 10, the closure body 13 cooperates with the mouth opening 8 for setting a minimum opening cross section of the EGR line 2.
  • Fig. 2 shows the embodiment according to Fig. 1 at maximum upstream adjusted sleeve 10.
  • the sleeve 10 can be adjusted as far upstream that the closure body 13, the mouth opening 8 closes.
  • the EGR line 2 is thereby blocked.
  • the closure body 13 is expediently equipped with a flow profile.
  • This flow profile can be designed, for example, as a drop profile.
  • the closure body 13 in the embodiments shown here on the inflow side on a hemisphere profile and may be provided downstream with a cone profile.
  • Essential is that the closure body 13, when it is provided for closing the mouth opening 8, at least on the inflow side complementary to the mouth opening 8 is formed. In the case of a circular orifice 8, therefore, a hemispherical shape is preferred for the inflow side of the closure body 13.
  • other forms for the closure body 13 are conceivable, which are also characterized by a low flow resistance.
  • closure body 13 and additionally or alternatively the respective orifice opening 8 may be provided with an adhesion-reducing coating.
  • a coating for example by means of PTFE or silicone, can reduce an accumulation of dirt particles at the mouth opening 8 or on the closure body 13.
  • at least one sealing element can be provided, which is arranged on the closure body 13 and / or on the mouth opening 8.
  • the closure body 13 is attached to the sleeve 10.
  • the connection between the sleeve 10 and closure body 13 by means of at least one radial web 14.
  • three radial webs 14 are provided to secure the closure body 13 to the sleeve 10.
  • each only one radial web 14 for connection between closure body 13 and sleeve 10 is provided.
  • the adjusting device 12 comprises an actuator 15, by means of which the sleeve 10 can be driven.
  • the actuator 15 drives an actuator 16, which is connected to the sleeve 10.
  • this actuator 16 is arranged upstream of the mouth opening 8, whereby an actuation of the actuator 16 with exhaust gas can be avoided.
  • the actuator 16 is provided at its downstream end with at least one radial web 17 which is connected via an axial web 18 with the sleeve 10. In the embodiments shown in each case three radial webs 17 are provided, which are each connected via an axial web 18 with the sleeve 10.
  • the actuator 16 is directly connected to the sleeve 10, which is achieved by a corresponding arrangement of the actuator 16 chosen close to the sleeve 9.
  • This embodiment can be realized with a reduced effort and can have a comparatively low flow resistance.
  • the actuator 15 is arranged outside the fresh air line 4.
  • the actuator 16 penetrates in these embodiments, the shell 9 of the fresh air line 4 sealed.
  • the fresh air line 4 is in the region in which the actuator 16 is passed through the sheath 9, curved in order to reduce the effort to realize an axial adjustability of the actuator 16 by means of the actuator 15.
  • the actuator 15 is arranged in the interior of the fresh air line 4, namely expedient upstream of the mouth opening 8, in order to avoid a loading of the actuator 15 with exhaust gas here.
  • the actuator 15 as here in Fig. 3 be dimensioned so small in terms of its cross-section that it is circumferentially umströmbar from the fresh air flow 5.
  • the actuator 15 is attached via radial webs 19 on the shell 9 of the fresh air line 4.
  • power supply lines and control lines can be passed through one of the radial webs 19.
  • the individual radial webs 19 or 17 or 14 can be aerodynamically profiled in such a way that they have the lowest possible flow resistance.
  • the fresh air line 4 in the region of the actuator 15 can also have a correspondingly widened cross section in order to reduce the flow resistance in this area.
  • the actuator 15 without actuator 16, since the actuator 15 operates electromagnetically in this embodiment.
  • the actuator 15 may be arranged outside the fresh air line 4 here.
  • the actuator 15 extends coaxially to the fresh air line 4 in the region of the sleeve 10 and can rest against the envelope 9 in particular on the outside.
  • the actuator 15 cooperates in this embodiment with the sleeve 10 without contact via electromagnetic forces, through the shell 9 therethrough.
  • the sleeve 10 and the sheath 9 are made of appropriate materials.
  • the shell 9 of the fresh air line 4 made of a plastic, while the sleeve 10 is formed by a ferromagnetic material. In this embodiment, there are thus no movable components in addition to the sleeve 10, whereby the risk of sooting or sooting and thus a functional impairment of the EGR valve 3 is reduced.
  • the electromagnetically operating actuator 15 also interact with an actuator 16, not shown here, which is connected to the sleeve 10 to drive the sleeve 10 for axial displacement.
  • the EGR valve 3 may also be equipped with a return device, which is not shown in the embodiments shown here.
  • a return device can be provided for example in the form of a return spring be and be integrated in particular in the actuator 15.
  • the restoring device is designed such that it drives the sleeve 10 upstream when the adjusting device 12 has failed or is switched off. With the aid of the restoring device, the sleeve 10 thus assumes a position of minimized EGR rate by itself. If the closure body 13 is provided, this is driven to the position with a minimum opening cross-section or in the closed position.
  • the EGR valve 3 can also be equipped with at least one flow-guiding element 20.
  • This flow-guiding element 20 is designed such that, with active exhaust gas recirculation, the exhaust gases emerging from the outlet opening 8 at least partially bypass the closure body 13. It is in principle possible to attach such a flow guide 20 as in the illustrated embodiment of the sleeve 10, wherein the flow guide 20 is located within the fresh air line 4 upstream of the closure body 13. It is clear that the attached to the sleeve 10 flow guide 20 is positioned so that it does not collide with the adjustment of the sleeve 10 with the end portion 7. Alternatively, the flow-guiding element 20 could in principle also be fastened to the closure body 13.
  • a variant which can be used cumulatively or alternatively in which two flow guide 20 'in the EGR line 2 and in the end portion 7 upstream of the mouth opening 8 are arranged. It is also possible to attach the flow guide 20 at the end portion 7, in such a way that it is then upstream of the mouth opening 8 in the fresh air line 4. It is clear that the attached at the end portion 7 flow guide 20 is positioned so that it does not collide with the adjustment of the sleeve 10 with the closure body 13.
  • flow guide elements 20, 20 'shown here are basically exposed to a strong admission of exhaust gas, however, these flow guide elements 20, 20' are not involved in adjusting the EGR rate, so that sooting or sooting of these flow guide elements 20, 20 'has no effect on the operation of the EGR device 1 has.
  • the end section 7 may have an inclined course relative to the flow direction of the fresh air flow 5, at least in an end region 21 which has the outlet opening 8.
  • the exhaust gas at the outlet opening 8 receives a directional component which passes the exhaust gas at the closure body 13 arranged in alignment with the outlet opening 8.
  • the end portion 7 extends at least partially parallel to the fresh air line 4.
  • the end portion 7 or at least the mouth opening 8 is arranged concentrically within the fresh air line 4. In principle, however, an eccentric arrangement of the mouth opening 8 is possible.
  • EGR line 2 In the embodiments of the Fig. 1 to 6 and 9 in each case only a single EGR line 2 is provided. In some internal combustion engines pulsations may arise on the exhaust side, which may adversely affect the exhaust gas recirculation. In order to prevent such repercussions, it may be expedient to provide more than one EGR line 2, the individual EGR lines 2 being assigned to different cylinders on the exhaust side or to different cylinder groups of the internal combustion engine. Accordingly, the show Fig. 7 and 8th two embodiments of variants of the EGR device 1, each with two EGR lines 2 and 2 'work. With both EGR lines 2, 2 ', the exhaust gases can be introduced into the fresh air line 4 in parallel with active exhaust gas recirculation. The two EGR lines 2, 2 'are expediently assigned to two different cylinders or cylinder groups of the internal combustion engine.
  • the EGR valve 3 for controlling the EGR lines 2, 2 ' is provided with two closure bodies 13, 13', which are fastened together to the sleeve 10 and can be positioned together by axially displacing the sleeve 10 relative to the respective orifice 8, 8 ' are.
  • the two EGR lines 2, 2 ' integralally formed.
  • the two EGR lines 2, 2 ' are arranged coaxially with one another.
  • the exhaust gases of the inner EGR pipe 2 'are thereby transported to the inside of the inner EGR pipe 2', while the exhaust gases of the outer EGR pipe 2 are transported in the annulus between the outer EGR pipe 2 and the inner EGR pipe 2 ' ,
  • the mouth openings 8, 8 'of the two EGR lines 2, 2' within the fresh air line 4 are arranged concentrically to each other or arranged concentrically with each other.
  • the two mouth openings 8, 8 ' can be arranged offset in the axial direction to each other, such that a common closure body 13 is sufficient, the mouth opening 8 of the outer EGR line 2 or simultaneously to close both mouth openings 8, 8 '.
  • the EGR device 1 may also be equipped with a fresh air auxiliary line 22.
  • This fresh air auxiliary line 22 extends on the outlet side in the end section 7 of the EGR line 2, namely coaxially with the end section 7 and at least up to its mouth opening 8 Fig. 9 an outlet-side end of the fresh air auxiliary line 22 can be seen, which is arranged concentrically in the outlet opening 8.
  • fresh air can be introduced centrally into the exhaust gas flow 6, which enters the fresh air line 4 through the outlet opening 8 during active exhaust gas recirculation.
  • the fresh air entering the fresh air auxiliary line 22 on the inlet side and exiting on the outlet side is in Fig. 9 symbolized by arrows 23.
  • the outlet end of the fresh air auxiliary line 22 is also aligned with the closure body 13. Accordingly, the closure body 13 is acted upon by active fresh exhaust gas recirculation with the centrally flowing fresh air 23 from the fresh air auxiliary line 22, which flows around the closure body 13 , As a result, a protective film of fresh air is virtually formed for the closure body 13, which prevents or at least impedes direct contact of the closure body 13 with the recirculated exhaust gases 6. The danger of pollution of the closure body 13 is thereby significantly reduced.
  • the fresh air auxiliary line 22 is coupled on the inlet side with a corresponding fresh air source.
  • the fresh air auxiliary line 22 extends on the inlet side into the fresh air line 4, in such a way that its inlet end is located upstream of the mouth opening 8 of the EGR line 2. This is achieved here in that the fresh air auxiliary line 22 extends through an unspecified wall of the EGR line 2 therethrough. The inlet-side end of the fresh air auxiliary line 22 is then located upstream of the EGR line 2 in the fresh air line 4.
  • the fresh air auxiliary line 22 extends in a straight line between its ends as here.
  • the positioning of the outlet end of the fresh air line 22 within the mouth opening 8 is advantageously carried out so that at least the mouth opening 8 can be closed in a desired manner by means of the closure body 13 with deactivated exhaust gas recirculation.
  • the outlet end of the fresh air auxiliary line 22 can also be closed by means of the closure body 13. If a predetermined minimum gap is to remain open as the minimum cross section for the outlet opening 8, the fresh air auxiliary line can be opened with the aid of the outlet end 22 define a corresponding stop for the closure body 13.
  • the fresh air 23, which is injected centrally into the recirculated exhaust gases 6, is removed internally from the fresh air line 4.
  • an external supply of fresh air 23 is conceivable.
  • the fresh air auxiliary pipe 22 could be like the second EGR pipe 2 'in the embodiment of FIG Fig. 8 coaxially within the (first) EGR line 2 and connected at a suitable location to a corresponding fresh air supply.

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

Abstract

Dispositif de recyclage (1) des gaz d'échappement pour un moteur à combustion interne, en particulier dans un véhicule à moteur, qui comporte une conduite (2) de recyclage des gaz d'échappement destinée à introduire des gaz d'échappement dans une conduite d'air frais (4), et une soupape (3) de recyclage des gaz d'échappement destinée à commander la conduite (2) de recyclage des gaz d'échappement, la conduite (2) de recyclage des gaz d'échappement comportant un segment terminal (7) s'étendant dans la conduite d'air frais (4) et pourvu d'un orifice de sortie (8). L'objet de la présente invention est d'améliorer la fiabilité dudit dispositif de recyclage (1) des gaz d'échappement. A cet effet, la soupape (3) de recyclage des gaz d'échappement possède un manchon (10) placé dans la conduite d'air frais (4), qui entoure la conduite de recyclage (2) des gaz d'échappement dans la zone de l'orifice de sortie (8), qui est installé de manière à pouvoir être déplacé axialement dans la conduite d'air frais (4) et qui possède radialement sur sa face interne un profil de buse (11) avec une section transversale d'écoulement se rétrécissant d'abord puis s'élargissant dans le sens d'écoulement, la soupape (3) de recyclage des gaz d'échappement possédant un dispositif de réglage (12) pour le déplacement axial du manchon (10) par rapport à la conduite d'air frais.

Claims (15)

  1. Dispositif de recyclage des gaz d'échappement d'un moteur à combustion interne, notamment dans un véhicule automobile,
    - comportant au moins une conduite de recyclage des gaz d'échappement (2,2') pour introduire du gaz d'échappement dans une conduite d'air frais (4) du moteur à combustion interne,
    - comportant une soupape de recyclage des gaz d'échappement (3) pour commander au moins une conduite de recyclage des gaz d'échappement (2,2'),
    - dans lequel au moins une conduite de recyclage des gaz d'échappement (2,2') présente une portion d'extrémité (7,7') s'étendant dans la conduite d'air frais (4) avec une ouverture d'embouchure (8,8') ouverte axialement,
    - dans lequel la soupape de recyclage des gaz d'échappement (3) présente un manchon (10) disposé dans la conduite d'air frais (4), lequel enveloppe au moins une conduite de recyclage des gaz d'échappement (2,2') au niveau de l'ouverture d'embouchure (8,8'), lequel est positionné de manière à se déplacer axialement dans la conduite d'air frais (4) et lequel présente radialement à l'intérieur un contour de buse (11) avec une section transversale d'écoulement diminuant d'abord dans la direction d'écoulement et augmentant ensuite,
    - dans lequel la soupape de recyclage des gaz d'échappement (3) présente un dispositif de réglage (12) pour déplacer axialement le manchon (10) par rapport à la conduite d'air frais (4),
    caractérisé en ce que
    sur le manchon (10) au moins un corps d'obturation (13,13') est disposé, lequel coopère avec l'ouverture d'embouchure (8,8') quand le manchon (10) est déplacé au maximum en amont afin de régler une section transversale d'ouverture minimale d'au moins une conduite de recyclage des gaz d'échappement (2,2').
  2. Dispositif de recyclage des gaz d'échappement selon la revendication 1,
    caractérisé en ce que
    - au moins un corps d'obturation (13,13') obture l'ouverture d'embouchure (8,8') quand le manchon (10) est déplacé au maximum en amont, ou
    - la section transversale d'ouverture maximale est un interstice, notamment un interstice annulaire, entre le corps d'obturation (13,13') et la portion d'extrémité (7,7').
  3. Dispositif de recyclage des gaz d'échappement selon la revendication 1 ou 2,
    caractérisé en ce que
    au moins un corps d'obturation (13,13') est disposé coaxialement à l'ouverture d'embouchure (8,8') respective.
  4. Dispositif de recyclage des gaz d'échappement selon une des revendications 1 à 3,
    caractérisé en ce que
    au moins un corps d'obturation (13) présente un profilé d'écoulement.
  5. Dispositif de recyclage des gaz d'échappement selon une des revendications 1 à 4,
    caractérisé en ce que
    au moins un corps d'obturation (13,13 () et/ou l'ouverture d'embouchure respective (8,8') est/sont pourvus d'un revêtement réduisant l'adhérence.
  6. Dispositif de recyclage des gaz d'échappement selon une des revendications 1 à 5,
    caractérisé en ce que
    un dispositif de rappel est prévu, lequel entraîne le manchon (10) en amont quand le dispositif de réglage (12) est débranché.
  7. Dispositif de recyclage des gaz d'échappement selon une des revendications 1 à 6,
    caractérisé en ce que
    au moins un élément conducteur d'écoulement (20,20') est prévu, lequel quand le recyclage des gaz d'échappement est actif guide les gaz d'échappement sortant de l'ouverture d'embouchure (8,8') au moins partiellement sur le corps d'obturation (13,13').
  8. Dispositif de recyclage des gaz d'échappement selon la revendication 7,
    caractérisé en ce que
    au moins un élément conducteur d'écoulement (20') est disposé dans la portion d'extrémité (7,7') de la conduite de recyclage des gaz d'échappement (2,2') en amont de l'ouverture d'embouchure (8,8').
  9. Dispositif de recyclage des gaz d'échappement selon la revendication 7 ou 8,
    caractérisé en ce que
    au moins un élément conducteur d'écoulement (20) est fixé sur la portion d'extrémité (7) de la conduite de recyclage des gaz d'échappement (2,2') et est disposé en aval de l'ouverture d'embouchure (8,8') dans la conduite d'air frais (4).
  10. Dispositif de recyclage des gaz d'échappement selon une des revendications 7 à 9,
    caractérisé n ce que
    au moins un élément conducteur d'écoulement (20) est fixé sur le manchon (10) et/ou sur le corps d'obturation (13,13') et est disposé en amont du corps d'obturation (13,13') dans la conduite d'air frais (4) .
  11. Dispositif de recyclage des gaz d'échappement selon une des revendications 7 à 10,
    caractérisé en ce que
    la portion d'extrémité (7) est inclinée au moins dans une région d'extrémité (21) présentant l'ouverture d'embouchure (8,8') en sens opposé à la direction d'écoulement dans la conduite d'air frais (4).
  12. Dispositif de recyclage des gaz d'échappement selon une des revendications 1 à 11,
    caractérisé en ce que
    au moins une conduite auxiliaire d'air frais (22) est prévue, laquelle s'étend du côté d'évacuation dans la portion d'extrémité (7,7') coaxialement au moins jusqu'à l'ouverture d'embouchure (8,8') et peut être introduite avec l'air frais (23) au centre dans un courant de gaz d'échappement (6) entrant à travers l'ouverture d'embouchure (8,8') dans la conduite d'air frais (4).
  13. Dispositif de recyclage des gaz d'échappement selon la revendication 12,
    caractérisé en ce que
    au moins une conduite auxiliaire d'air frais (22) s'étend du côté d'admission jusqu'à la conduite d'air frais (4) en amont de l'ouverture d'embouchure (8,8').
  14. Dispositif de recyclage des gaz d'échappement selon les revendications 12 ou 13,
    caractérisé en ce que
    au moins une conduite auxiliaire d'air frais (22) s'étend en ligne droite entre ses extrémités et/ou à travers une paroi du dispositif de recyclage des gaz d'échappement (2,2') respectif.
  15. Dispositif de recyclage des gaz d'échappement selon une des revendications 1 à 14,
    caractérisé en ce que
    le contour de buse (11) est configuré comme une buse Venturi.
EP06722588A 2005-04-29 2006-03-11 Dispositif de recyclage des gaz d'echappement Active EP1875061B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005020484A DE102005020484A1 (de) 2005-04-29 2005-04-29 Abgasrückführeinrichtung
PCT/DE2006/000431 WO2006116957A1 (fr) 2005-04-29 2006-03-11 Dispositif de recyclage des gaz d'echappement

Publications (2)

Publication Number Publication Date
EP1875061A1 EP1875061A1 (fr) 2008-01-09
EP1875061B1 true EP1875061B1 (fr) 2009-05-13

Family

ID=36763561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06722588A Active EP1875061B1 (fr) 2005-04-29 2006-03-11 Dispositif de recyclage des gaz d'echappement

Country Status (4)

Country Link
US (1) US7798135B2 (fr)
EP (1) EP1875061B1 (fr)
DE (2) DE102005020484A1 (fr)
WO (1) WO2006116957A1 (fr)

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DE102015200196A1 (de) 2015-01-09 2016-07-14 Elringklinger Ag Mischvorrichtung, Verbrennungsmotor und Verfahren zur Herstellung einer Mischvorrichtung
DE102016010582A1 (de) 2016-09-02 2018-03-08 Deutz Aktiengesellschaft Abgasrückführeinrichtung für eine Brennkraftmaschine

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DE102015200196A1 (de) 2015-01-09 2016-07-14 Elringklinger Ag Mischvorrichtung, Verbrennungsmotor und Verfahren zur Herstellung einer Mischvorrichtung
DE102016010582A1 (de) 2016-09-02 2018-03-08 Deutz Aktiengesellschaft Abgasrückführeinrichtung für eine Brennkraftmaschine
DE102016010582B4 (de) 2016-09-02 2022-01-27 Deutz Aktiengesellschaft Abgasrückführeinrichtung für eine Brennkraftmaschine

Also Published As

Publication number Publication date
DE502006003726D1 (de) 2009-06-25
EP1875061A1 (fr) 2008-01-09
US20090050120A1 (en) 2009-02-26
DE102005020484A1 (de) 2006-11-02
US7798135B2 (en) 2010-09-21
WO2006116957A1 (fr) 2006-11-09

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