EP0856657B1 - Soupape de recirculation de gaz d'échappement pour un moteur à combustion - Google Patents

Soupape de recirculation de gaz d'échappement pour un moteur à combustion Download PDF

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Publication number
EP0856657B1
EP0856657B1 EP97119328A EP97119328A EP0856657B1 EP 0856657 B1 EP0856657 B1 EP 0856657B1 EP 97119328 A EP97119328 A EP 97119328A EP 97119328 A EP97119328 A EP 97119328A EP 0856657 B1 EP0856657 B1 EP 0856657B1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
drive
gas recirculation
recirculation valve
valve according
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.)
Expired - Lifetime
Application number
EP97119328A
Other languages
German (de)
English (en)
Other versions
EP0856657A3 (fr
EP0856657A2 (fr
Inventor
Frank Zimmermann
Thomas Peuker
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.)
Gustav Wahler GmbH and Co KG
Original Assignee
Gustav Wahler GmbH and Co KG
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 Gustav Wahler GmbH and Co KG filed Critical Gustav Wahler GmbH and Co KG
Publication of EP0856657A2 publication Critical patent/EP0856657A2/fr
Publication of EP0856657A3 publication Critical patent/EP0856657A3/fr
Application granted granted Critical
Publication of EP0856657B1 publication Critical patent/EP0856657B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
    • 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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
    • F02M26/54—Rotary actuators, e.g. step motors

Definitions

  • the invention relates to an exhaust gas recirculation valve for a Internal combustion engine with the features in the preamble of the claim 1.
  • the gear-shaping device has an eccentric one Cam on whose outer peripheral surface is the cam track to act on the stop of the actuating element forms.
  • Such a cam is also from JP-A-55081253 for control an exhaust gas recirculation valve known.
  • a disadvantage of one cam control is that it is only in one direction, z. B. in the valve opening direction, is effective and thus Valve actuation in the other direction, e.g. B. closing direction, another drive, e.g. B. a spring, which is due the risk of spring breakage is a weak point in the system.
  • FR-A-2 506 389 In another known exhaust gas recirculation valve (FR-A-2 506 389) has the forming device of a thread transmission on, by means of a rotatable spindle, the engages in a sleeve-like spindle nut, the orbital movement the spindle can be converted into a translational movement.
  • either the threaded spindle can be axially immovable and engage directly in an axially displaceable spindle nut, which are integral with the axially displaceable actuator of the valve, or the rotatable spindle nut is in turn also relative to a fixed one Threaded sleeve axially displaceable, by means of which an external thread is geared, wherein then the axially displaceable actuator in the Intervenes inside the sleeve-shaped spindle nut and by means of this can be actuated axially, at least in one valve actuation direction.
  • Such a gear shaping device is complex.
  • the adjustment device In another known exhaust gas recirculation valve (DE 296 12 465 U1) the adjustment device consists of a vacuum adjuster, one to the actuator with valve member Coaxial force generated in the closed position of the valve member this acts on a force in the opening direction a, which results from the pressure of the exhaust gas in the exhaust duct.
  • the adjustment device must therefore have a correspondingly high, opposite direction Apply the clamping force continuously.
  • the adjustment device is accordingly complex and large-volume. apart one of them becomes another, not of a ruling one and / or adjusting device which is dependent on negative pressure sought.
  • the exhaust gas recirculation valve should be reliable work as well as small, light and compact be and for the movement of the valve member in the open position or closed position of the adjustment device only require low forces, which are accordingly light and should be designed compact.
  • the invention has for its object in an exhaust gas recirculation valve of the type mentioned above the above Requirements to take into account and the disadvantages mentioned to eliminate.
  • the invention also provides the prerequisites for a quick adjustment of the valve member is possible, load changes in can be done in the shortest possible time without being intolerable Exhaust gases or the like. Disadvantages occur.
  • the invention is based on one in the drawing shown embodiment explained in more detail.
  • the drawing shows a schematic section of a part of an exhaust gas recirculation valve in the closed position.
  • the valve 10 has a housing 11 with inner fresh air duct 12 through which e.g. in the direction arrows 13 fresh air, e.g. the intake air of the internal combustion engine, is passed through.
  • the outlet side 16 opens into the fresh air duct 12.
  • the Exhaust duct 14 contains between the inlet side 15 and the Outlet side 16 a e.g.
  • valve seat 17 which is controlled by a valve member 18 which on the side 19 facing valve seat 17 crowned, e.g. spherical section shaped, is trained.
  • a reverse design is also possible.
  • an actuator 20 e.g. in form of a Rod, a plunger or the like. That means in the housing 11 a socket 21 is slidably guided.
  • the valve member 18 becomes translational in the direction of arrow 22 between the closed position shown and the downward opening position emotional.
  • An adjusting device 23 serves this purpose.
  • a rib 24 is arranged, which is an integral part of the housing 11 can be and as a temperature shield and as protection to reduce any dirt deposits serves above the rib 24.
  • the adjusting device 23 has a rotating one Drive 25 with output shaft 26 on the cross, in particular aligned approximately at right angles to the actuator 20 is.
  • the drive 25 is e.g. designed as a stepper motor. In the embodiment shown, it exists from a rotary magnet of conventional type. Also other rotary drives are within the scope of the invention.
  • the adjustment device 23 also has a drive 25 connected downstream gear-changing device 27, by means of the the rotary drive movement of the drive 25 in a Translational movement of the actuator 20 is deformable.
  • valve member 18 As can be seen, lies in the shown Closed position of the valve member 18 with the side 19 on On valve seat 17, which faces the actuator 20, the valve member 18 towards the inlet side 15, in the drawing can be brought down to its open position.
  • the Establishing this open position therefore requires one Push down.
  • the valve member 18 will by means of a closing spring 28 into the closed position shown pulled, the closing spring 28 so arranged and is designed to accommodate the opening movement opposed and after opening when the actuator is released 20 automatically returns to the closed position allows.
  • the closing spring 28 is e.g. as cylindrical coil spring formed in the area of upper end of the actuator 20 coaxially arranged to this and with its lower end on the housing 11 is supported, while the other end immediately or acts indirectly on the actuator 20.
  • the closing spring 28 is designed as a compression spring.
  • the drive 25 generates a rotary drive movement in one Direction of rotation, e.g. clockwise to operate the Valve member 18 in its open position.
  • the return movement can be in the closed position when the actuator is released 20 done by the closing spring 28.
  • a rotary drive movement in the same direction of rotation, clockwise, as for the generation of the open position generate and thereby release the actuator 20.
  • the latter can be active due to the rotary drive movement of the drive 25 moves into the closed position become.
  • the actuator is released 20 or with gear coupling this with the Drive 25 the active movement of the actuator 20th reached in the closed position even when the Drive 25 in a different design for bringing about Closed position a rotary drive movement in to the first Direction of rotation opposite direction of rotation, thus counterclockwise, generated.
  • the forming device 27 is designed here as a cam drive. This has a rotary drive driven by the drive 25 Cam 29 with eccentric cam track 30 with which the Actuator 20 indirectly via a stop 31 in There is contact, but instead an immediate one Contact directly with the facing end of the actuator 20 can be provided.
  • the stop 31 is on Attached end of the actuator 20 and is e.g. from a plate aligned transversely to the longitudinal central axis, on the top of which the cam 29 with the cam track 30 is applied.
  • On the underside of the stop 31 is the Closing spring 28 which is supported on the end thereof.
  • the Cam 29 has at least one to the output shaft 26 eccentric eccentric part 32 on the cam track 30th e.g. in the form of its outer surface.
  • the at least one Eccentric part 32 is based on the diametral of the output shaft 26 symmetrical.
  • gear-changing device is designed as a backdrop.
  • the cam 29 has a cam track Groove, which is designed as an outer or inner cam track.
  • the stop 31 connected to the actuator 20 is here e.g. formed from a sliding or rolling body, e.g. from a sliding block or from a roll that in the groove engages.
  • the drive 25 can be made after the opening position has been established of the valve member 18 but also in the cam 29 an opposite direction of rotation, thus counterclockwise, reset until the starting position shown is reached again. Again, depending on Design of the drive 25, the return movement of the Cam 29 via the closing spring 28 and the actuator 20 take place or at least be supported.
  • the exhaust gas recirculation valve 10 has the advantage that the valve member 18 is pressed automatically against the valve seat 17 under the pressure of the exhaust gas on the inlet side 15. Any negative pressure in the fresh air duct 12 also supports this automatic pressing. This ensures a reliable closed position even at high pressures on the inlet side 15.
  • the adjusting device 23 and the shaping device 27 are relieved of forces which otherwise act on them under the exhaust gas pressure.
  • valve adjustment for example in the open position, so that any forces acting under the pressure of the exhaust gas and axially opposing the opening movement are kept away from the drive and are not absorbed by it must and do not lead to a force opposing the actuating force in the opening direction blocking the drive.
  • the adjustment device enables fast valve adjustment with a low actuating torque.
  • the rapid adjustment has the advantage that changes in the load of the internal combustion engine can take place in the shortest possible time without undesired exhaust gases occurring. Should an automatic resetting of the cam 29 be necessary in some cases, this can be done on the output shaft 26 or instead on the cam 29
  • Spring 33 may be provided, here as a torsion spring is trained and with its other end somewhere on Housing 11 is supported.
  • the spring 33 is designed here and arranged that when you turn the Cam 29 is stretched counterclockwise and one resilient clockwise return movement. If the effect is to be in opposite directions, the spring 33 accordingly mounted in opposite directions.

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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)

Claims (15)

  1. Soupape de réinjection des gaz d'échappement dans un moteur à combustion interne, comprenant une cage de soupape (11), qui comporte un canal pour gaz d'échappement (14) avec un siège de soupape (17), contrôlé par un élément de soupape (18), dont l'élément de commande (20), tel qu'une tige-poussoir, est mobile dans la cage de soupape (11) et est activé par une unité de réglage (23), qui comporte une unité de transmission à action rotatoire (25) et une unité de conversion intermédiaire, disposée en aval de l'unité de transmission, au moyen de laquelle le mouvement d'entraínement en rotation de l'unité de transmission peut être transformé en un mouvement de translation de l'élément de commande (20) avec l'élément de soupape (18), et qui comporte une came (29) avec une glissière de came (30) excentrée, laquelle est entraínée en rotation par l'unité de transmission (25) et avec laquelle l'élément de commande (20) est directement ou indirectement en contact, laquelle porte, de préférence sur l'extrémité, une butée (31) qui est en appui contre la glissière (30) de la came (29), caractérisée en ce que la glissière de came (30) est conçue sous forme de rainure et en ce que la butée de l'élément de commande (20) est formée par un corps de glissement ou de roulement, qui s'engage dans la rainure.
  2. Soupape de réinjection des gaz d'échappement selon la revendication 1, caractérisée en ce que l'élément de soupape (18) est en appui contre le siège de soupape (17) avec le côté (19), qui est orienté vers l'élément de commande (20), et est susceptible de se déplacer vers le côté d'admission (15) des gaz d'échappement pour se mettre en position d'ouverture.
  3. Soupape de réinjection des gaz d'échappement selon la revendication 1 ou 2, caractérisée en ce que l'élément de soupape (18) est contraint en position de fermeture au moyen d'un ressort de fermeture (28), agissant sur l'élément de commande (20), et peut être amené en position d'ouverture à l'encontre du ressort de fermeture (28).
  4. Soupape de réinjection des gaz d'échappement selon une des revendications 1 à 3, caractérisée en ce que l'élément de soupape (18) est conçu sensiblement en forme de sphère partielle sur le côté (19) orienté vers le siège de soupape (17) et le siège de soupape (17) est conçu sensiblement en forme de cône tronqué, ou inversement.
  5. Soupape de réinjection des gaz d'échappement selon une des revendications 1 à 4, caractérisée en ce que l'unité de transmission (25) à action rotatoire produit un mouvement d'entraínement en rotation dans un sens de rotation en vue d'activer l'élément de soupape (18) vers sa position d'ouverture.
  6. Soupape de réinjection dès gaz d'échappement selon une des revendications 1 à 5, caractérisée en ce que l'unité de transmission (25) à action rotatoire produit un mouvement d'entraínement en rotation dans un sens de rotation contraire en vue d'activer l'élément de soupape (18) vers sa position de fermeture.
  7. Soupape de réinjection des gaz d'échappement selon une des revendications 3 à 6, caractérisée en ce que l'élément de soupape (18), au moment de sa libération, peut se déplacer automatiquement vers la position de fermeture au moyen du ressort de fermeture (28).
  8. Soupape de réinjection des gaz d'échappement selon une des revendications 1 à 7, caractérisée en ce que l'unité de transmission (25) à action rotatoire est orientée avec son axe médian longitudinal transversalement, en particulier sensiblement à angle droit, par rapport à l'élément de commande (20).
  9. Soupape de réinjection des gaz d'échappement selon une des revendications 1 à 8, caractérisée en ce que l'unité de transmission (25) à action rotatoire est conçue sous forme de moteur pas à pas.
  10. Soupape de réinjection des gaz d'échappement selon une des revendications 1 à 9, caractérisée en ce que l'unité de transmission (25) à action rotatoire est conçue sous forme d'aimant rotatif.
  11. Soupape de réinjection des gaz d'échappement selon une des revendications 1 à 10, caractérisée en ce que l'unité de conversion (27) intermédiaire est conçue sous forme d'entraínement à came.
  12. Soupape de réinjection des gaz d'échappement selon une des revendications 3 à 11, caractérisée en ce que le ressort de fermeture (28) est en appui avec une extrémité contre la cage de soupape (11) et avec l'autre extrémité contre la butée (31), telle qu'une plaque, et est conçu sous forme de ressort de pression, ou en ce que le ressort de fermeture est conçu sous forme d'une partie de l'unité de transmission (25), par exemple sous forme de ressort de torsion.
  13. Soupape de réinjection des gaz d'échappement selon une des revendications 1 à 12, caractérisée en ce que la came (29) comporte au moins une partie excentrée (32).
  14. Soupape de réinjection des gaz d'échappement selon une des revendications 1 à 13, caractérisée en ce que la partie excentrée (32), au moins au nombre d'une, est conçue symétriquement.
  15. Soupape de réinjection des gaz d'échappement selon une des revendications 1 à 14, caractérisée en ce qu'un ressort de rappel (33), en particulier un ressort de torsion, entre en prise contre l'arbre de sortie (26) de l'unité de transmission (25) ou contre la came (29).
EP97119328A 1997-02-04 1997-11-05 Soupape de recirculation de gaz d'échappement pour un moteur à combustion Expired - Lifetime EP0856657B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19704091 1997-02-04
DE19704091A DE19704091A1 (de) 1997-02-04 1997-02-04 Abgasrückführventil für eine Brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP0856657A2 EP0856657A2 (fr) 1998-08-05
EP0856657A3 EP0856657A3 (fr) 1998-12-02
EP0856657B1 true EP0856657B1 (fr) 2003-01-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119328A Expired - Lifetime EP0856657B1 (fr) 1997-02-04 1997-11-05 Soupape de recirculation de gaz d'échappement pour un moteur à combustion

Country Status (3)

Country Link
EP (1) EP0856657B1 (fr)
BR (1) BR9800539A (fr)
DE (2) DE19704091A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7533659B2 (en) 2006-07-06 2009-05-19 Cooper-Standard Automotive (Deutchland) Gmbh Exhaust-gas recirculation valve
WO2019121286A1 (fr) 2017-12-18 2019-06-27 Pierburg Gmbh Dispositif de soupape pour un moteur à combustion interne

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830230C2 (de) * 1998-04-11 2002-05-23 Man Nutzfahrzeuge Ag Rückschlagventil für Abgasrückführung
DE19927186A1 (de) * 1999-06-15 2000-12-28 Daimler Chrysler Ag Abgasrückführeinrichtung mit einem Tellerventil
DE19961756C1 (de) * 1999-12-21 2001-04-19 Siebe Automotive Deutschland Gmbh Abgasrückführventil
US6390079B1 (en) * 2000-08-21 2002-05-21 Siemens Canada Limited Exhaust gas recirculation valve including cam linkage for converting constant angular motion to non-linear motion
DE10104227C1 (de) * 2001-01-31 2003-01-16 Bosch Gmbh Robert Einrichtung zur Behandlung von Gasströmen
DE10108043B4 (de) * 2001-02-20 2005-09-01 Robert Bosch Gmbh Selbstreinigende Ventile im Zuluft- oder Abgassystem bei Verbrennungskraftmaschinen
DE10125094A1 (de) 2001-05-23 2002-11-28 Siemens Ag Abgasrückführeinrichtung
EP1462643A1 (fr) * 2003-03-25 2004-09-29 Cooper-Standard Automotive (Deutschland) GmbH Mécanisme d'ouverture d'une soupape
DE10336976B4 (de) * 2003-08-12 2005-08-18 Pierburg Gmbh Ventilvorrichtung für eine Verbrennungskraftmaschine
EP1526272B2 (fr) * 2003-10-24 2012-04-11 Cooper-Standard Automotive (Deutschland) GmbH Soupape de recirculation de gaz d'échappement
GB0419060D0 (en) 2004-08-27 2004-09-29 Delphi Tech Inc Valve actuating mechanism
ATE498084T1 (de) 2008-10-06 2011-02-15 Cooper standard automotive deutschland gmbh Abgasrückführventil
DE102013114058A1 (de) * 2013-12-16 2015-06-18 BorgWarner Esslingen GmbH Heißgasventil
DE102015111460B4 (de) 2015-05-07 2020-02-06 BorgWarner Esslingen GmbH Ventil
DE102015111461B4 (de) 2015-05-07 2020-02-06 BorgWarner Esslingen GmbH Abgasrückführventil und Verfahren zur Verbesserung eines solchen Ventils

Citations (1)

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Publication number Priority date Publication date Assignee Title
JPS5581253A (en) * 1978-12-12 1980-06-19 Nissan Motor Co Ltd Exhaust gas recycling controller

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
JPS57193751A (en) * 1981-05-25 1982-11-29 Mikuni Kogyo Co Ltd Egr valve and its control method
US4561408A (en) * 1984-01-23 1985-12-31 Borg-Warner Corporation Motorized flow control valve
FR2681381A1 (fr) * 1991-09-16 1993-03-19 Labinal Perfectionnements apportes aux dispositifs de recyclage des gaz d'echappement.
DE19603592C1 (de) * 1996-02-01 1997-05-15 Daimler Benz Ag Ventilsteuerung für eine Brennkraftmaschine
DE29612465U1 (de) 1996-07-18 1996-09-05 Gustav Wahler Gmbh U. Co, 73730 Esslingen Abgasrückführventil für eine Brennkraftmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5581253A (en) * 1978-12-12 1980-06-19 Nissan Motor Co Ltd Exhaust gas recycling controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7533659B2 (en) 2006-07-06 2009-05-19 Cooper-Standard Automotive (Deutchland) Gmbh Exhaust-gas recirculation valve
WO2019121286A1 (fr) 2017-12-18 2019-06-27 Pierburg Gmbh Dispositif de soupape pour un moteur à combustion interne

Also Published As

Publication number Publication date
EP0856657A3 (fr) 1998-12-02
DE59709190D1 (de) 2003-02-27
DE19704091A1 (de) 1998-08-06
BR9800539A (pt) 1999-06-08
EP0856657A2 (fr) 1998-08-05

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