EP0964147B1 - Valve de recirculation de gaz d'échappement pour moteurs à combustion - Google Patents

Valve de recirculation de gaz d'échappement pour moteurs à combustion Download PDF

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Publication number
EP0964147B1
EP0964147B1 EP99110259A EP99110259A EP0964147B1 EP 0964147 B1 EP0964147 B1 EP 0964147B1 EP 99110259 A EP99110259 A EP 99110259A EP 99110259 A EP99110259 A EP 99110259A EP 0964147 B1 EP0964147 B1 EP 0964147B1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
gas recirculation
valve
valve according
valve seat
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
EP99110259A
Other languages
German (de)
English (en)
Other versions
EP0964147A2 (fr
EP0964147A3 (fr
Inventor
Frank Zimmermann
Thomas Peuker
Andreas Kaiser
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
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Application filed by Gustav Wahler GmbH and Co KG filed Critical Gustav Wahler GmbH and Co KG
Publication of EP0964147A2 publication Critical patent/EP0964147A2/fr
Publication of EP0964147A3 publication Critical patent/EP0964147A3/fr
Application granted granted Critical
Publication of EP0964147B1 publication Critical patent/EP0964147B1/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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/68—Closing members; Valve seats; Flow passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
    • 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

Definitions

  • valve member designed as a valve plate
  • the outer edge in an annular collar same cross section that passes in one of the valve seat surface of the Axially projecting away from the housing part and on the outer Circumferential surface in the arc area is the ring surface acting as a sealing surface having.
  • This sealing surface is approximately quarter-circular in cross-section a correspondingly arcuate valve seat surface in one in the Assigned part of the valve seat used.
  • the valve seat consists of a Ring, the associated on the inner peripheral surface, in cross section has quarter-circle-shaped valve seat.
  • the plate-shaped valve member moves with the outer ring surface in Axial direction away from the inner peripheral surface of the valve seat.
  • the Closing movement of the valve moves the valve member axially in the direction the valve seat, whereby the closed position is reached when the in Cross-section quarter-circular outer peripheral surface of the valve plate in surface contact with the corresponding inner peripheral surface of the Valve seat arrives, the outer annular surface of the valve member having a positive fit is received in the inner peripheral surface of the valve seat.
  • Exhaust gas recirculation valves for internal combustion engines are also known (DE 196 07 810 A1), in which the valve member from below for closing the Valve passage is created against the valve seat surface.
  • the valve member is seated usually at the end of an actuator in the form of a rod, one Ram, a shaft or the like, on which an actuator, preferably e.g. on electric actuator for actuating the valve element in the opening direction or closing direction attacks.
  • an actuator preferably e.g. on electric actuator for actuating the valve element in the opening direction or closing direction attacks.
  • a Electric motor a stepper motor, an electric rotary magnet or the like. electromagnetic turntable may be provided.
  • the valve seat surface is approximately frustoconical in shape tapered inclined surface in a plate-shaped upper part of the housing part educated.
  • the valve member is designed as a flat plate, of which the Valve seat surface associated ring surface also as approximately frustoconical tapered inclined surface is formed. In the closed position of the Valve are the valve member side ring surface and the valve seat surface of the Valve passages on top of each other.
  • exhaust gas recirculation valves of the type mentioned arise in particular in connection with the exhaust gas cooling and when cooling this in the area between the valve surfaces sitting on top of each other thereby problems that at low temperatures on the valve member and on the valve passage adjacent Areas of the housing part liquid, condensate and / or Collect particles that harden when cooled and that valve surfaces sitting on top of each other, for example similar to adhesive can stick together, creating a reliable subsequent opening function and another one at all reliable operation of the exhaust gas recirculation valve is at risk becomes or becomes impossible.
  • the invention has for its object an exhaust gas recirculation valve of the type mentioned at the beginning that a perfect opening or closing function guaranteed between the valve member and the valve seat is.
  • the at least one top recording on Valve member which is provided there recessed, forms a Reservoir for any liquid, condensate and / or particles in this at least one recording get in, e.g. can flow in, so that these thereby in a particularly simple manner from the ring surface of the valve member and / or the valve seat surface of the Housing part are kept away.
  • Fig. 1 is only schematically the one of interest here Part of an otherwise at least essentially known Exhaust gas recirculation valve 10 shown for exhaust gas recirculation determined in internal combustion engines and e.g. into an intake manifold the internal combustion engine is installed. It points a lower housing part 11, on which no further Exhaust gas recirculation line shown, illustrated by the Arrow 12 is fed.
  • the housing part 11 contains one Valve passage 13 with an annular valve seat surface 14, which cooperates with an associated valve member 15, the one of the valve seat surface 14 associated ring surface 16 having.
  • the valve member 15 is in a conventional manner as is not shown further, at the lower end of an actuator in the form of a rod, a plunger, a shaft od.dergl.
  • an actuator on this actuator attacks e.g. in the form of an electric actuator, e.g. from an electric motor or stepper motor or rotary magnets or the like. can exist.
  • the annular surface 16 of the valve member 15 is axial on one protruding collar 40 of the valve member 15 is formed, which is arranged on the top of the valve member 15.
  • valve seat surface 14 is on the lower side of the Housing part 11 arranged, the bottom and in Direction of valve seat surface 14 in the direction of arrow 12 the exhaust gas can be supplied.
  • the valve member 15 is on the Bottom of the housing part 11 arranged and from below against the valve seat surface 14 to bring about the in Fig. 1 shown closed position can be applied.
  • valve seat surface 14 on the underside is an inclined surface 44 formed, which face away from the valve member 15 Axial direction tapered approximately frustoconical.
  • the ring surface 16 formed on the upper side of the ring collar 40 of the valve member 15 is also an inclined surface 46 formed in the valve seat 14 facing Axial direction tapered approximately frustoconical.
  • the taper angle of the inclined surfaces 44 and 46 is according to FIG. 1 and 2 are of equal size and are of the order of magnitude about 120 °.
  • FIG. 2 reveals, closes the annular surface 16, in particular in the training as an inclined surface 46, the collar 40 with their outside diameter and also with their inside diameter each essentially with the corresponding outer diameter or inner diameter of the inclined surface 44 Valve seat 14 from.
  • the projecting collar 40 is radially outside of one to the longitudinal center axis 9 approximately coaxial outer cylinder surface 48 limited.
  • valve seat surface 14 designed as an inclined surface 44 is approximately radially inward from one to the longitudinal central axis 9 limited coaxial inner cylinder surface 47 which the Valve passage 13 surrounds and defines.
  • valve seat surface 14 of the housing part 11 is on one relatively thin in cross section, approximately disc-shaped Head area 49 of the housing part 11 is formed.
  • valve seat surface 14 designed as an inclined surface 44 adjoins an annular surface 45 radially on the outside lies within a radial plane that is approximately rectangular is aligned with the longitudinal central axis 9.
  • the top of the Head area 49 is through a to this annular surface 45th approximately parallel head surface 50 limited.
  • the valve body 15 has on the valve seat surface 14 facing top 51 one or more recessed open, upwardly open receptacles 52 as collecting spaces, in which there is liquid, condensate and / or particles can collect, especially when the exhaust gas recirculation valve cools down 10 from the exhaust gas, in particular from diesel exhaust gas, can fail.
  • the at least one receptacle 52 takes such particles, liquids or the like. on, so that these from the inclined surfaces interacting 44 and 46 should be kept as far as possible.
  • FIGS. 1 and 2 has the valve body 15 on the upper side as recessed Receptacle 52 at least one recessed annular groove, which e.g. has a width of about 2 mm to 3 mm and the radially outside through the axially projecting ring collar 40 is limited.
  • Radially inside connects to the least a top receptacle 52, in particular an annular groove, one for Longitudinal central axis 9 rising conical surface 53, the approximately frustoconical in the direction of the valve seat surface 14 tapered and axially over the collar 40 and the Ring surface 16 also protrudes upwards.
  • the axial projection dimension the conical surface 53 lies e.g. in the order of magnitude of 2 mm.
  • This configuration of the exhaust gas recirculation valve 10 according to 1 and 2 is a flawless with simple means Closing function or opening function between the valve seat surface 14 and the valve member 15 ensures that an accumulation of particles, liquid, condensate or the like, which fail during cooling from the exhaust gas, in Area of the inclined surfaces 44 and 46 acting with one another as far as possible is excluded.
  • FIG. 3 are in the second embodiment for the parts that correspond to the first exemplary embodiment in FIG. 1 and 2 correspond to the same reference numerals, so that thereby avoiding repetitions on the Description of the first embodiment referred is.
  • valve seat surface 14 is designed as a flat surface, which are within a to the longitudinal central axis of the valve passage 13 extends approximately rectangular radial plane.
  • the cutting edge 60 is radially outward from that to the longitudinal central axis the valve passage 13 approximately coaxial outer Cylinder surface 48 and radially inward from an inner bevel surface 61 that defines itself with the formation of the cutting edge 60 in the ring surface 16, which presents itself as a ring line to meet.
  • the inner inclined surface 61 tapers in the Axial direction approximately frustoconical, that of the flat valve seat 14 is turned away. Also in this embodiment has the valve member 15 as in the first embodiment at least one recessed top, upward open image corresponding to the image 52 on.
  • the cutting edge 60 is the size in the closed position 3 in contact with each other Areas kept as small as possible so that any particles, liquids, condensate sticking in between or the like, which, when cured, is about sticking together could result in contact surfaces, practically none Have area approach.
  • a sharp tear-off edge radially inward in the form of the inner inclined surface 61 and radially outward in the form of the outer cylinder surface 48 created by tearing off any accumulations is promoted. Due to the training as a cutting edge 60 this, moreover, during the transfer of the valve member 15 any accumulations in the closed position according to FIG. 3, that should adhere to the valve seat surface 14, cut and break open, so that this of the Valve seat 14 are detached.
  • the cutting edge 60 is formed in the region of the valve seat surface 14, the annular member 16 on the valve member side then e.g. can be designed as a flat ring surface.
  • the cutting edge is 60 radially inward from one to the longitudinal central axis of the valve passage 13 approximately coaxial inner cylinder surface 62 and defined radially on the outside by an outer inclined surface 63, which meet to form the cutting edge 60, the Ring surface 16 in turn represents a circle.
  • the outer bevel 63 tapers in the shape of a truncated cone Axial direction, which faces the flat valve seat surface 14 is. 4 are the same Advantages as achieved by that in Fig. 3.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)

Claims (27)

  1. Soupape de recyclage des gaz d'échappement pour moteurs à combustion interne présentant dans une pièce de carter (11) un obturateur (13) avec une surface d'obturation (14) et un élément de soupape (15) avec une surface annulaire (16) associée à la surface d'obturation (14) et tournée vers celle-ci au niveau d'une collerette annulaire s'élevant axialement,
    caractérisée en ce que
    la surface annulaire (16) de l'élément de soupape (15) est réalisée sur la face avant à l'extrémité faisant saillie axialement de la collerette annulaire (40) de l'élément de soupape (15).
  2. Soupape de recyclage des gaz d'échappement selon la revendication 1, caractérisée en ce que la surface d'obturation (14) est disposée sur la face inférieure, tournée vers l'élément de soupape (15), de la pièce de carter (11) à laquelle des gaz d'échappement peuvent être amenés par le bas et en direction de la surface d'obturation (14).
  3. Soupape de recyclage des gaz d'échappement selon la revendication 2, caractérisée en ce que l'élément de soupape (15) est disposé sur la surface inférieure de la pièce de carter (11) et peut être appliqué par le bas contre la surface d'obturation (14).
  4. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la collerette annulaire (40) faisant saillie axialement est disposée sur la face supérieure, tournée vers la surface d'obturation (14), de l'élément de soupape (15).
  5. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la surface d'obturation (14) est réalisée comme une surface inclinée (44) qui s'amenuise de façon approximativement tronconique dans la direction axiale détournée de l'élément de soupape (15).
  6. Soupape de recyclage des gaz d'échappement selon la revendication 5, caractérisée en ce que l'angle conique de la surface inclinée tronconique (44) est de l'ordre d'environ 120°.
  7. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la surface annulaire (16) de l'élément de soupape (15) est réalisée comme une surface inclinée (46) qui s'amenuise de façon approximativement tronconique dans la direction axiale tournée vers la surface d'obturation (14).
  8. Soupape de recyclage des gaz d'échappement selon la revendication 7, caractérisée en ce que l'angle conique de la surface inclinée tronconique (46) de l'élément de soupape (15) correspond à l'angle conique de la surface d'obturation (14) réalisée sous forme de surface inclinée tronconique (44).
  9. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 1 à 8, caractérisée en ce que la surface annulaire (16), en particulier la surface inclinée (46), de la collerette annulaire faisant saillie (40) se termine par son diamètre extérieur et/ou par son diamètre intérieur respectivement au moins substantiellement avec celui de la surface d'obturation (14) réalisée comme une surface inclinée (44).
  10. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 1 à 9, caractérisée en ce que la collerette annulaire faisant saillie (40) est limitée radialement à l'extérieur par une surface cylindrique extérieure (48) approximativement coaxiale par rapport à la ligne médiane longitudinale (9) de l'obturateur (13).
  11. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 1 à 10, caractérisée en ce que la surface d'obturation (14) de la pièce de carter (11) est réalisée au niveau d'une région de tête (49) à section mince, par exemple approximativement en forme de disque, de la pièce de carter (11).
  12. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 1 à 11, caractérisée en ce que la surface d'obturation (14) réalisée comme une surface inclinée (44) est limitée radialement à l'intérieur par une surface cylindrique intérieure (47) approximativement coaxiale par rapport à la ligne médiane longitudinale (9) de l'obturateur (13), la surface cylindrique entourant l'obturateur (13).
  13. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 1 à 12, caractérisée en ce que la surface d'obturation (14) réalisée comme une surface inclinée (44) est suivie radialement à l'extérieur d'une surface annulaire (45) qui s'étend dans un plan radial orienté approximativement à angle droit par rapport à la ligne médiane longitudinale (9) de l'obturateur (13).
  14. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 1 à 13, caractérisée en ce que l'élément de soupape (15) présente sur sa surface supérieure (51) un ou plusieurs logements (52) en retrait, ouverts en haut, comme un réservoir collecteur.
  15. Soupape de recyclage des gaz d'échappement selon la revendication 14, caractérisée en ce que l'élément de soupape (15) présente comme logements évidés (52) au moins une rainure annulaire évidée.
  16. Soupape de recyclage des gaz d'échappement selon la revendication 15, caractérisée en ce que la largeur de la rainure annulaire est d'environ 2 à 3 mm.
  17. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 14 à 16, caractérisée en ce que ledit au moins un logement (52), en particulier la rainure annulaire, de l'élément de soupape (15) est limité radialement à l'extérieur par la collerette annulaire s'élevant axialement (40).
  18. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 14 à 17, caractérisée en ce que ledit au moins un logement (52), en particulier la rainure annulaire, de l'élément de soupape (15) est suivi radialement à l'intérieur d'une surface conique (53) montant en direction de la ligne médiane longitudinale (9).
  19. Soupape de recyclage des gaz d'échappement selon la revendication 18, caractérisée en ce que la surface conique (52) s'amenuise de façon approximativement tronconique dans la même direction axiale que la surface d'obturation (14) réalisée comme une surface inclinée (44).
  20. Soupape de recyclage des gaz d'échappement selon la revendication 18 ou 19, caractérisée en ce que la surface conique (53) fait saillie vers le haut axialement au-delà de la collerette annulaire (40) et la surface annulaire (16) de l'élément de soupape (15).
  21. Soupape de recyclage des gaz d'échappement selon la revendication 20, caractérisée en ce que la cote de dépassement axial de la surface conique (53) est environ de l'ordre de 2 mm.
  22. Soupape de recyclage des gaz d'échappement selon l'une quelconque des revendications 1 à 21, caractérisée en ce qu'à l'extrémité faisant saillie axialement de la collerette annulaire (40) de l'élément de soupape (15), la surface annulaire se réduit à une lame (60) orientée vers la surface d'obturation (14).
  23. Soupape de recyclage des gaz d'échappement selon la revendication 22, caractérisée en ce que la surface d'obturation (14) est réalisée comme une surface plane qui s'étend dans un plan radial, approximativement à angle droit par rapport à la ligne médiane longitudinale (9) de l'obturateur (13).
  24. Soupape de recyclage des gaz d'échappement selon la revendication 22 ou 23, caractérisée en ce que la lame (60) est formée radialement à l'extérieur par la surface cylindrique extérieure (48) approximativement coaxiale par rapport à la ligne médiane longitudinale (9) de l'obturateur (13) et radialement à l'intérieur par une surface inclinée intérieure (61) qui se rejoignent en formant la surface annulaire (16).
  25. Soupape de recyclage des gaz d'échappement selon la revendication 24, caractérisée en ce que la surface inclinée intérieure (61) s'amenuise de façon approximativement tronconique dans une direction axiale détournée de la surface d'obturation (14).
  26. Soupape de recyclage des gaz d'échappement selon la revendication 22 ou 23, caractérisée en ce que la lame (60) est formée radialement à l'intérieur par une surface cylindrique intérieure (62) approximativement coaxiale par rapport à la ligne médiane longitudinale (9) de l'obturateur (13) et radialement à l'extérieur par une surface inclinée extérieure (63) qui se rejoignent en formant la surface annulaire (16).
  27. Soupape de recyclage des gaz d'échappement selon la revendication 26, caractérisée en ce que la surface inclinée extérieure (63) s'amenuise de façon approximativement tronconique dans une direction axiale tournée vers la surface d'obturation (14).
EP99110259A 1998-06-09 1999-05-27 Valve de recirculation de gaz d'échappement pour moteurs à combustion Expired - Lifetime EP0964147B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19825656A DE19825656A1 (de) 1998-06-09 1998-06-09 Abgasrückführventil für Brennkraftmaschinen
DE19825656 1998-06-09

Publications (3)

Publication Number Publication Date
EP0964147A2 EP0964147A2 (fr) 1999-12-15
EP0964147A3 EP0964147A3 (fr) 2000-10-18
EP0964147B1 true EP0964147B1 (fr) 2003-11-12

Family

ID=7870355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99110259A Expired - Lifetime EP0964147B1 (fr) 1998-06-09 1999-05-27 Valve de recirculation de gaz d'échappement pour moteurs à combustion

Country Status (2)

Country Link
EP (1) EP0964147B1 (fr)
DE (2) DE19825656A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10044780A1 (de) * 2000-09-09 2002-04-04 Wahler Gmbh & Co Kg Gustav Steuereinrichtung mit einer Steuerklappe zur Steuerung eines Mediums
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

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03267563A (ja) * 1990-03-16 1991-11-28 Taiho Kogyo Co Ltd 排気ガス再循環装置
DE4009923C2 (de) * 1990-03-28 1995-11-02 Fev Motorentech Gmbh & Co Kg Ventil zum Dosieren des Abgasrückführstromes bei Brennkraftmaschinen
JPH08135520A (ja) * 1994-11-14 1996-05-28 Fuji Oozx Inc 内燃機関用排気ガス還流制御弁装置
DE19539921C1 (de) * 1995-10-26 1997-02-27 Ranco Inc Ventil
DE19607810A1 (de) 1996-03-01 1997-09-04 Bosch Gmbh Robert Abgasrückführventil
JPH09264203A (ja) * 1996-03-28 1997-10-07 Aisan Ind Co Ltd 排気ガス還流装置
DE19701239A1 (de) * 1997-01-16 1998-07-23 Bosch Gmbh Robert Abgasrückführventil
DE19711199A1 (de) * 1997-03-19 1998-09-24 Wahler Gmbh & Co Gustav Abgasrückführventil für eine Brennkraftmaschine
JP3940862B2 (ja) * 1997-06-25 2007-07-04 株式会社デンソー 排気ガス還流制御弁

Also Published As

Publication number Publication date
EP0964147A2 (fr) 1999-12-15
DE59907686D1 (de) 2003-12-18
EP0964147A3 (fr) 2000-10-18
DE19825656A1 (de) 1999-12-16

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