EP0952331B1 - Soupape de recirculation de gaz d'échappement - Google Patents

Soupape de recirculation de gaz d'échappement Download PDF

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Publication number
EP0952331B1
EP0952331B1 EP99105366A EP99105366A EP0952331B1 EP 0952331 B1 EP0952331 B1 EP 0952331B1 EP 99105366 A EP99105366 A EP 99105366A EP 99105366 A EP99105366 A EP 99105366A EP 0952331 B1 EP0952331 B1 EP 0952331B1
Authority
EP
European Patent Office
Prior art keywords
valve
exhaust gas
gas recirculation
head
recirculation valve
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
EP99105366A
Other languages
German (de)
English (en)
Other versions
EP0952331A2 (fr
EP0952331A3 (fr
Inventor
Armin Schürfeld
Dieter Thönnessen
Uwe Rothuysen
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.)
Pierburg GmbH
Original Assignee
Pierburg 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
Application filed by Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP0952331A2 publication Critical patent/EP0952331A2/fr
Publication of EP0952331A3 publication Critical patent/EP0952331A3/fr
Application granted granted Critical
Publication of EP0952331B1 publication Critical patent/EP0952331B1/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
    • F02M26/50—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
    • 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
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/48—EGR valve position sensors
    • 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
    • F02M26/69—Lift valves, e.g. poppet valves having two or more valve-closing members
    • 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
    • F02M26/72—Housings

Definitions

  • the invention relates to an exhaust gas recirculation valve according to the preamble of the main claim.
  • Such an exhaust gas recirculation valve known from DE 43 38 192 A1 measures for reduction NOx emissions and to improve consumption in diesel engine exhaust depending on the operating point or map point of the intake engine combustion air to.
  • the exhaust gas recirculation valve is in a connecting line between the engine exhaust line and suction line, preferably arranged directly on the intake manifold.
  • the exhaust gas recirculation valve can be operated pneumatically or electrically. When the coil is energized a magnetic field builds up and moves the armature, which in turn hits a closing spring the valve opens via a valve rod. With the pneumatically operated exhaust gas recirculation valve is connected to the valve stem by applying a vacuum Diaphragm opened the valve against a spring.
  • the valve can be equipped with only one seat, but has in the illustrated, electrical Version for boost pressure compensation (and thus to reduce the required Positioning force) two seats connected in series.
  • the valve is used to meter the amount of exhaust gas returned to the intake air a position control via a potentiometer z. B. from the electromagnetic actuator in brought a defined opening position. With a pneumatic valve with position feedback the pressure in the working chamber is regulated accordingly.
  • exhaust gas recirculation especially of relatively cold exhaust gas, e.g. B. in operating conditions, in which the engine is not yet warmed up or with the help of exhaust gas cooling of heat exchangers to reduce NOx emissions, deposits occur of soot, paint and condensate in the area of the exhaust gas recirculation valve.
  • the invention has for its object this costly and environmentally harmful Avoid disturbance of the exhaust gas recirculation system.
  • the exhaust gas recirculation valve 1 is mounted on a suction pipe, not shown, that the exhaust gas inlet 2 is arranged in a chamber separate from the outlets 3. at an electromagnetic exhaust gas recirculation valve, a coil 4 is arranged in the drive head 5. This cooperates with an anchor 6, which is in operative connection with the Valve plate 8 carrying valve rod 9 via the respective locking elements 18, 21, 23, 24 stands.
  • the armature 6 interacts with a device 10 for position feedback, the output of which a computer, not shown, which processes further operating parameters is the opening adjustment of the exhaust gas recirculation valve and thus the recirculated Exhaust gas quantity determined.
  • the valve plate 8 cooperate with the valve seats 11.
  • the exhaust gas recirculation valve can also have a valve seat and a valve disk be executed.
  • the valve rod 9 is loaded by a spring 12 in the closing direction. To open the exhaust gas recirculation valve even when the valve disc is stuck and ensure valve seat, the valve operates as described below.
  • the plunger 15 has a reduced cross section 16 in the embodiment according to FIG. 1 in which radially at least one element 18 loaded by a spring 17, which is also known as Ball can be executed, engages.
  • the head 19 of the head directed against the Ram 15 is for reduced cross section 16 z.
  • B is conical and represents the element 18 is a run-up track. To overcome the forces of the spring 7, 17 must the magnet 4 generate a correspondingly high force.
  • valve head 13 follows through the non-positive connection by means of a spring 17 and element 18 the plunger 15 or the armature 6 depending on the current applied the solenoid 4.
  • the locking position is once by a Permanent magnet 21, which acts on a collar 22 of the plunger 15, the other by a generated at a predetermined force yielding plate spring 23 or a bow spring 24.
  • the plate spring 23 and the residual force of the magnet 21 simultaneously meet the Function of the return spring 7.
  • the drive head 5 as Known pneumatic actuator can be formed by a membrane in two Chambers is divided and an attachment attached to the membrane plates the effect of Anchor 6 takes over while storing the kinetic energy during acceleration and acts on the head 19 of the plunger 15 as soon as it is controlled by a valve Working chamber is subjected to negative pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Check Valves (AREA)
  • Lift Valve (AREA)
  • Fluid-Driven Valves (AREA)

Claims (5)

  1. Soupape de recirculation de gaz d'échappement (1) comprenant au moins une tête de soupape (8) assemblée avec une tige de soupape (9), concourant avec un siège de soupape (11) et maítrisant la liaison du conduit d'échappement avec la conduite d'admission d'un moteur à combustion interne, et un ordinateur traitant des paramètres de service déterminant en fonction de l'état de fonctionnement du moteur à combustion interne la position d'ouverture de la soupape de recirculation de gaz d'échappement (1) au moyen d'une commande agissant contre la force d'un ressort (12), caractérisée en ce qu'il est prévu un composant (6) qui, après qu'une force maintenant dans une position d'encliquetage un poussoir (15) intercalé a été surmontée, établit après le passage d'un jeu X une énergie cinétique si élevée que ce composant (6) peut être amené en liaison active avec un chapeau (13) sur l'extrémité libre de la tige de soupape (9).
  2. Soupape de recirculation de gaz d'échappement suivant la revendication 1, caractérisée en ce que le composant (6) agit par un embout (14) sur la tête (19) d'un poussoir (15) disposé entre l'embout (14) et le chapeau (13) de la tige de soupape (9).
  3. Soupape de recirculation de gaz d'échappement suivant la revendication 2, caractérisée en ce que la tête (19) du poussoir (15) se prolonge en cône par une section transversale réduite (16), dans la zone de laquelle est disposé au moins un élément (18) chargé par un ressort (17) dans la direction radiale.
  4. Soupape de recirculation de gaz d'échappement suivant la revendication 2, caractérisée en ce que le poussoir (15) présente un collet (22) attiré par un aimant permanent (21), qui est disposé dans le chapeau (13) de la tige de soupape (9) de sorte qu'il subsiste, dans l'état d'attraction, un jeu X par rapport à la tige de soupape (9) dans la direction d'ouverture de la soupape.
  5. Soupape de recirculation de gaz d'échappement suivant la revendication 2, caractérisée en ce que le poussoir (15) est disposé de façon précontrainte en direction de l'embout (14), dans le chapeau (13) de la tige de soupape (9), par un ressort (23) présentant un point de poussée.
EP99105366A 1998-04-21 1999-03-16 Soupape de recirculation de gaz d'échappement Expired - Lifetime EP0952331B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19817740 1998-04-21
DE19817740A DE19817740A1 (de) 1998-04-21 1998-04-21 Abgasrückführventil

Publications (3)

Publication Number Publication Date
EP0952331A2 EP0952331A2 (fr) 1999-10-27
EP0952331A3 EP0952331A3 (fr) 2000-07-05
EP0952331B1 true EP0952331B1 (fr) 2003-07-02

Family

ID=7865292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99105366A Expired - Lifetime EP0952331B1 (fr) 1998-04-21 1999-03-16 Soupape de recirculation de gaz d'échappement

Country Status (2)

Country Link
EP (1) EP0952331B1 (fr)
DE (2) DE19817740A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU90665B1 (en) * 2000-10-25 2002-04-26 Delphi Tech Inc Exhaust gas recirculation valve for an internal combustion engine
DE10143307A1 (de) * 2001-09-04 2003-03-20 Pierburg Gmbh Elektromagnetischer Stellantrieb
EP3627016A1 (fr) * 2018-09-19 2020-03-25 Continental Automotive GmbH Soupape

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5762954A (en) * 1980-09-30 1982-04-16 Aisin Seiki Co Ltd Egr control valve apparatus and its control method
DE4332513A1 (de) * 1993-09-24 1995-03-30 Pierburg Gmbh Steuerventil für Abgasrückführung
DE4338192C2 (de) 1993-11-09 1998-03-19 Pierburg Ag Elektromagnetisches Steuerventil für Abgasrückführung
JP3479353B2 (ja) * 1994-10-17 2003-12-15 株式会社ケーヒン 排気ガス再循環バルブ

Also Published As

Publication number Publication date
DE59906150D1 (de) 2003-08-07
EP0952331A2 (fr) 1999-10-27
DE19817740A1 (de) 1999-10-28
EP0952331A3 (fr) 2000-07-05

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