EP2025910B1 - Système de recirculation des gaz d'échappement - Google Patents

Système de recirculation des gaz d'échappement Download PDF

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Publication number
EP2025910B1
EP2025910B1 EP07014901A EP07014901A EP2025910B1 EP 2025910 B1 EP2025910 B1 EP 2025910B1 EP 07014901 A EP07014901 A EP 07014901A EP 07014901 A EP07014901 A EP 07014901A EP 2025910 B1 EP2025910 B1 EP 2025910B1
Authority
EP
European Patent Office
Prior art keywords
valve
exhaust gas
gas recirculation
actuator
recirculation system
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.)
Revoked
Application number
EP07014901A
Other languages
German (de)
English (en)
Other versions
EP2025910A1 (fr
Inventor
Bernhard Klipfel
Christoph Thiery
Jan Helber
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.)
Cooper Standard Automotive Deutschland GmbH
Original Assignee
Cooper Standard Automotive Deutschland GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38812334&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2025910(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Cooper Standard Automotive Deutschland GmbH filed Critical Cooper Standard Automotive Deutschland GmbH
Priority to PT07014901T priority Critical patent/PT2025910E/pt
Priority to EP07014901A priority patent/EP2025910B1/fr
Priority to DE502007002202T priority patent/DE502007002202D1/de
Priority to ES07014901T priority patent/ES2337192T3/es
Priority to AT07014901T priority patent/ATE450706T1/de
Priority to CNA2008101294435A priority patent/CN101358566A/zh
Priority to KR1020080074053A priority patent/KR101501772B1/ko
Priority to US12/182,029 priority patent/US8353274B2/en
Publication of EP2025910A1 publication Critical patent/EP2025910A1/fr
Publication of EP2025910B1 publication Critical patent/EP2025910B1/fr
Application granted granted Critical
Priority to KR1020140097494A priority patent/KR20140103243A/ko
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • F02M26/13—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
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • F02M26/26—Layout, e.g. schematics with coolers having bypasses characterised by details of the bypass valve
    • 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
    • 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

Definitions

  • the invention relates to an exhaust gas recirculation system.
  • the exhaust gas can also be passed, at least partially, through an exhaust gas cooler, also depending on the operating state, in order to set the temperature of the recirculated exhaust gas in a targeted manner.
  • a device for exhaust gas recirculation in which an actuator for a valve which determines the amount of recirculated exhaust gas is attached to a flange of the exhaust gas cooler.
  • the JP 9-88727 relates to an exhaust gas cooler, inside which a translationally movable valve is provided, the adjusting element is mounted on a jacket of the exhaust gas cooler.
  • the EP 1 251 263 A2 discloses an exhaust gas recirculation system according to the preamble of claim 1.
  • the invention has for its object to provide an exhaust gas recirculation system, which allows a particularly reliable operation under all operating conditions.
  • this has at least one cooler with a housing and at least one pivotally or rotatably operable valve on an inflow side.
  • the housing of the radiator is used, for example, to receive those lines through which the exhaust gas to be recirculated, and optionally a suitably insulated bypass line.
  • a coolant such as water
  • the bypass tube is provided either outside the radiator housing, or within the same and suitably isolated, so that there is a much less extensive cooling of the recirculated exhaust gas.
  • the radiator of the exhaust gas recirculation system described herein may be configured as shown in FIG EP 1 277 945 A1 the applicant is described.
  • valve on the inflow side has the advantage that here the exhaust gas is relatively hot, so that there is a significantly reduced risk of deposits and contamination, which could lead to sticking of the valve on his valve seat. Nevertheless, if such problems occur, which can lead to a certain adhesion of the valve to its valve seat, the inventive design of the valve as a pivotally actuated valve offers advantages. This is understood to mean that not only the actuator for the valve is designed to pivot, but also that the valve or the valve element itself between the closed and the open position, and vice versa, moves pivoting. This can, as described in more detail below, with simple means safe operation, especially with regard to reliable opening guaranteed.
  • a pivotally actuated valve element can be arranged in a favorable manner and comparatively simple means so that it influences the flow of the exhaust gas as little as possible even in the open state and thus the flow resistance at the valve is minimized.
  • the invention provides that the actuator for the valve is provided on the radiator housing. This can be done in an advantageous manner, a cooling of the actuator. In particular, excessive heating of the actuator is avoided, so that a high degree of operational reliability is achieved.
  • the radiator housing may, for example, receive the (usually liquid) coolant used to cool the exhaust gas flowing through the respective ducts. As a result, the cooler housing itself is cooled, so that advantageously results in the corresponding cooling effect for the actuator.
  • the actuator may also be referred to as an actuating element and may be embodied, for example, as an electric motor, in particular a DC motor.
  • the arrangement of the axis of rotation always presents a special challenge.
  • leakage problems frequently occur when the axis of rotation extends "through" the valve element and insofar the edge of the valve element is interrupted.
  • the valve element is at least simply provided eccentrically with respect to its axis of rotation.
  • the axis of rotation of the valve element when viewed in the closed state, be offset in the flow direction or opposite thereto, so that the edge of the valve element does not need to be interrupted and a reliable closing can be ensured.
  • the axis of rotation with respect to the valve element again considered in the closed state, offset in a direction perpendicular to the flow direction, i. eccentric, be provided.
  • valve member As already indicated, for reasons of reliable closure, it is preferred for the valve member to close a valve seat about its entire circumference, i. that its edge is essentially uninterrupted.
  • the actuator is connected via at least one lever and at least one connecting element, such as a coupling rod with the valve.
  • This offers considerable design freedom while allowing the above-described favorable arrangement of the valve on the "hot” side and the arrangement of the actuator on a cooled component.
  • the freedom of design is further increased by the fact that a ball joint between at least one lever and at least one coupling rod is provided.
  • the coupling rod and at least one lever preferably a lever of the actuator, at least substantially aligned.
  • pressure pulsations may occur in the recirculated exhaust gas which act on the valve element. If the coupling rod and in particular a lever provided on the actuator are aligned with one another, these forces acting on the valve element by the exhaust gas can not change the position of the valve element, since this is effectively blocked or locked.
  • the direction of the force acting on the coupling rod force due to the pressure pulsations namely passes largely through the axis of rotation of the actuator, so that no rotation of the actuator can be generated.
  • the actuator comprise at least one position sensor.
  • an exhaust gas recirculation valve which determines the amount of recirculated exhaust gas. Accordingly, the actuator of an exhaust gas recirculation valve is preferably attached to the radiator housing.
  • bypass valve It has proven to be beneficial for the bypass valve to connect this with a vacuum actuator or an electric actuator.
  • exhaust gas recirculation system 10 has a radiator 12, a (in Fig. 1 unrecognizable) exhaust gas recirculation valve, an actuator 14 for this purpose, a bypass valve 16 and a vacuum actuator 18 for the bypass valve 16.
  • the supply of the exhaust gas to be recirculated takes place through the inflow 20.
  • This has in the embodiment shown at its end a flange 22 for connection to the exhaust gas recirculation line.
  • the feeder 20 has a bend of approximately 90 °, at the end of which the exhaust gas recirculation valve actuated by the actuator 14 is provided.
  • the exhaust gas recirculation valve may be configured as described above, and controls the amount of recirculated exhaust gas.
  • bypass valve 16 Downstream of the flow direction is the bypass valve 16 which, in the embodiment shown, controls the amount of exhaust gas which is passed through a correspondingly insulated (unrecognizable) bypass pipe in order to achieve a significantly lower cooling effect than for those pipes (not recognizable) which are also, but not or slightly isolated, passed through the radiator 12.
  • the radiator 12 has a housing 24, in which both at least one bypass pipe and those lines are arranged, through which the exhaust gas to be cooled flows.
  • the said pipes and tubes are lapped by coolant, for example water, by suitable inflows and outflows, of which Fig. 1 one denoted by "26", is added and removed.
  • the actuator 14 is arranged for the exhaust gas recirculation valve and accordingly protected against unfavorable, too high temperatures.
  • the actuator 14 is designed, for example as a DC motor, and the motor shaft is followed by a gear 28, which in more detail in Fig. 2 can be seen.
  • the output of the transmission is effected by a lever 30, which is connected in the case shown via a ball joint with a coupling rod 32. About another ball joint, the connection is made with a lever 34 which is attached to the rotary shaft of the exhaust gas recirculation valve.
  • a lever 34 which is attached to the rotary shaft of the exhaust gas recirculation valve.
  • Fig. 2 This is supplementary in Fig. 2 recognizable, showing a top view with removed gear cover. Accordingly, the motor shaft can be seen with a comparatively small pinion 36, which acts on a comparatively large pinion 38. This is connected to another small pinion 40, which is engaged with a toothed segment 42. This segment 42 is connected to the lever 30, from which the force on the coupling rod 32 and the lever 34 (see. Fig. 1 ) is transmitted to the exhaust gas recirculation valve. The size of the toothed segment 42 corresponds approximately to the intended range of motion. In Fig. 2 It can also be seen that the actuator, in the case shown on the toothed segment 42, has a position sensor 44. Finally go out Fig. 2 further inflows or outflows 26 for the liquid coolant out. In the embodiment shown, a holder 46 is further provided for mounting the exhaust gas recirculation system to a surrounding component.
  • Fig. 3 shows an exhaust gas recirculation system, in particular with regard to the transmission of the force from the actuator 14 to the (in Fig. 3 also not recognizable) exhaust gas recirculation valve is designed differently.
  • the "output" of the actuator or its transmission is again formed by a lever 30, which in turn is connected via a ball joint with a coupling rod 32.
  • the connection from the coupling rod 32 to the exhaust gas recirculation valve is also via a ball joint and connected to the axis of rotation of the exhaust gas recirculation valve lever 34.
  • the lever 30 and the coupling rod 32 are in a nearly parallel orientation.
  • the lever 34 could lie in a common plane with the lever 30 and the coupling rod 32, but is in the embodiment of Fig. 3 a little, as shown by Fig. 3 , "tilted" in the direction of the viewer.
  • Out Fig. 3 is a preferred measure to recognize that in the in Fig. 3 shown closed or slightly open state of the exhaust gas recirculation valve, the coupling rod 32 and provided on the actuator lever 30 are largely aligned. This has the consequence that pressure pulsations, which can act on the valve element, do not lead to a change in the position of the valve element.
  • the force thus generated extends namely in the direction of the coupling rod 32, thus in the direction of the lever 30 and thus largely by the axis of rotation 48 of the lever 30. Because the force largely passes through this axis, is of the pressure pulsations, for lack of a lever arm, no Torque applied to the lever, so that there is no risk that the position of the valve element changed by such pressure pulsations.
  • the exhaust gas recirculation system according to the invention thus provides a high level of operational reliability.
  • Fig. 4 can be seen from the sectional view of the exhaust gas recirculation valve 50, which is shown in its open position.
  • the axis of rotation 52 is for the reasons given above in two directions with respect to the valve 50 eccentric. Firstly, the axis of rotation in the flow direction A is offset from the valve 50, so that the axis of rotation 52 does not extend through the valve 50, which accordingly has an uninterrupted circumference and closes the valve seat 54 along its entire circumference.
  • the axis of rotation 52 as shown by Fig. 4 offset to the bottom, which means that the valve in the open state, that it is located at most on the edge of the flow and this affects only a small extent.
  • both the valve seat 54 and the edge of the valve 50 is conically formed on its side facing the valve seat 54 in order to achieve the most reliable possible sealing.
  • the bypass valve 16 can be seen, which has at its one end a rotation axis 56 and is designed as a kind of trumpet valve.
  • the bypass valve 16 closes the area leading to tubes that are cooled in the radiator 12.
  • the bypass valve closes the bypass line, so that the recirculated exhaust gas flows completely through the example in the radiator water-purged pipes and is cooled accordingly.
  • the bypass valve 16 and the exhaust gas recirculation valve 50 are integrated into a common one-piece housing 58.

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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)
  • Lift Valve (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Exhaust Silencers (AREA)

Claims (8)

  1. Système de recirculation des gaz d'échappement (10), avec au moins un refroidisseur (12) avec un carter (24), et au moins une soupape (50) munie d'un élément de soupape actionné en pivotement, sur un côté arrivée d'écoulement (20), un actionneur (14) pour la soupape étant monté sur le carter de refroidisseur (24) et relié à la soupape (50) par l'intermédiaire d'au moins un levier (30, 34) et d'au moins un élément de liaison, telle qu'une bielle (32),
    caractérisé en ce qu'
    arbre d'actionneur est disposé transversalement à un axe de rotation (52) de l'élément de soupape, et en ce qu'une articulation sphérique est prévue entre au moins un levier (30, 34) et au moins un élément de liaison, tel qu'une bielle (32).
  2. Système de recirculation des gaz d'échappement selon la revendication 1, caractérisé en ce que l'élément de soupape est prévu de manière excentrique, au moins dans une direction, par rapport à son axe de rotation (52).
  3. Système de recirculation des gaz d'échappement selon la revendication 1 ou 2, caractérisé en ce que l'élément de soupape obture un siège de soupape (54) autour de sa pleine périphérie.
  4. Système de recirculation des gaz d'échappement selon la revendication 2 ou 3, caractérisé en ce que, lorsque la soupape (50) se trouve en un état au moins à peu près fermé, la bielle (52) et au moins un levier (30), de préférence un levier (30) de l'actionneur (14), sont au moins notablement en alignement ensemble.
  5. Système de recirculation des gaz d'échappement selon l'une des revendications précédentes, caractérisé en ce que l'actionneur (14) présente au moins un capteur de position (44).
  6. Système de recirculation des gaz d'échappement selon l'une des revendications précédentes, caractérisé en ce qu'est prévue à titre de soupape (50) une soupape de recirculation des gaz d'échappement, dont l'actionneur (14) est monté sur le carter de refroidisseur (24).
  7. Système de recirculation des gaz d'échappement selon l'une des revendications précédentes, caractérisé en ce qu'est prévue en outre une soupape de dérivation de refroidisseur (16), intégrée, avec la soupape (50), dans un carter (58) commun.
  8. Système de recirculation des gaz d'échappement selon la revendication 7, caractérisé en ce que la soupape de dérivation (16) est reliée à un actionneur à vide (18) ou à un actionneur électrique.
EP07014901A 2007-07-30 2007-07-30 Système de recirculation des gaz d'échappement Revoked EP2025910B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
PT07014901T PT2025910E (pt) 2007-07-30 2007-07-30 Sistema de reciclagem de gases de escape
EP07014901A EP2025910B1 (fr) 2007-07-30 2007-07-30 Système de recirculation des gaz d'échappement
DE502007002202T DE502007002202D1 (de) 2007-07-30 2007-07-30 Abgasrückführsystem
ES07014901T ES2337192T3 (es) 2007-07-30 2007-07-30 Sistema de recirculacion de gases de escape.
AT07014901T ATE450706T1 (de) 2007-07-30 2007-07-30 Abgasrückführsystem
KR1020080074053A KR101501772B1 (ko) 2007-07-30 2008-07-29 배기 가스 재순환 시스템
CNA2008101294435A CN101358566A (zh) 2007-07-30 2008-07-29 排气再循环系统
US12/182,029 US8353274B2 (en) 2007-07-30 2008-07-29 Exhaust gas recirculation system
KR1020140097494A KR20140103243A (ko) 2007-07-30 2014-07-30 배기 가스 재순환 시스템

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07014901A EP2025910B1 (fr) 2007-07-30 2007-07-30 Système de recirculation des gaz d'échappement

Publications (2)

Publication Number Publication Date
EP2025910A1 EP2025910A1 (fr) 2009-02-18
EP2025910B1 true EP2025910B1 (fr) 2009-12-02

Family

ID=38812334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07014901A Revoked EP2025910B1 (fr) 2007-07-30 2007-07-30 Système de recirculation des gaz d'échappement

Country Status (8)

Country Link
US (1) US8353274B2 (fr)
EP (1) EP2025910B1 (fr)
KR (2) KR101501772B1 (fr)
CN (1) CN101358566A (fr)
AT (1) ATE450706T1 (fr)
DE (1) DE502007002202D1 (fr)
ES (1) ES2337192T3 (fr)
PT (1) PT2025910E (fr)

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JP4192759B2 (ja) * 2003-10-31 2008-12-10 株式会社デンソー ディーゼル機関の噴射量制御装置
EP1544449B1 (fr) 2003-12-19 2007-02-21 Cooper-Standard Automotive (Deutschland) GmbH Soupape de recirculation de gaz d'échappement
DE102004040818B4 (de) 2004-08-24 2009-04-02 Pierburg Gmbh Abgasklappeneinrichtung
DE102004045021B4 (de) 2004-09-15 2013-07-11 Behr Gmbh & Co. Kg Wärmetauscher für Verbrennungsmotoren
EP1640593A1 (fr) 2004-09-28 2006-03-29 Cooper-Standard Automotive (Deutschland) GmbH Mécanisme de fermeture de soupape
US20080104950A1 (en) * 2005-02-03 2008-05-08 Herve Palanchon Exhaust Gas Heat Exchanger, Especially for Motor Vehicles
DE502005010797D1 (de) * 2005-03-31 2011-02-17 Cooper standard automotive deutschland gmbh Abgasrückführsystem
DE102005033601B4 (de) 2005-07-14 2008-07-03 Küster Automotive Door Systems GmbH Elektromechanische Stelleinrichtung für Abgasstauklappe
ES2322728B1 (es) * 2005-11-22 2010-04-23 Dayco Ensa, S.L. Intercambiador de calor de tres pasos para un sistema "egr".
US7320220B1 (en) * 2006-12-15 2008-01-22 Caterpillar Inc. EGR valve having integrated motor, controller, and flow meter
US7958874B2 (en) * 2007-02-05 2011-06-14 Denso Corporation Exhaust gas recirculation apparatus
JP4553023B2 (ja) * 2008-03-21 2010-09-29 株式会社デンソー 排気ガス切替弁

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PT2025910E (pt) 2010-02-23
ATE450706T1 (de) 2009-12-15
KR20140103243A (ko) 2014-08-26
KR101501772B1 (ko) 2015-03-11
US8353274B2 (en) 2013-01-15
EP2025910A1 (fr) 2009-02-18
US20090139502A1 (en) 2009-06-04
ES2337192T3 (es) 2010-04-21
KR20090013083A (ko) 2009-02-04
CN101358566A (zh) 2009-02-04
DE502007002202D1 (de) 2010-01-14

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