EP0952331A2 - Soupape de recirculation de gaz d'échappement - Google Patents

Soupape de recirculation de gaz d'échappement Download PDF

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Publication number
EP0952331A2
EP0952331A2 EP99105366A EP99105366A EP0952331A2 EP 0952331 A2 EP0952331 A2 EP 0952331A2 EP 99105366 A EP99105366 A EP 99105366A EP 99105366 A EP99105366 A EP 99105366A EP 0952331 A2 EP0952331 A2 EP 0952331A2
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.)
Granted
Application number
EP99105366A
Other languages
German (de)
English (en)
Other versions
EP0952331B1 (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 engine exhaust gas depending on the operating point or map point in order to reduce the NOx emissions and improve the consumption of the diesel engine.
  • the exhaust gas recirculation valve is arranged in a connecting line between the engine exhaust line and the intake line, preferably 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 opens the valve against a closing spring via a valve rod. In the pneumatically operated exhaust gas recirculation valve, the valve is opened against a spring by applying a vacuum to a membrane connected to the valve rod.
  • the valve can be equipped with only one seat, but has two seats connected in series in the illustrated electrical version for boost pressure compensation (and thus to reduce the required actuating force).
  • boost pressure compensation and thus to reduce the required actuating force.
  • the valve is adjusted with the help of a position control via a potentiometer, e.g. B. brought by the electromagnetic servomotor into a defined open position.
  • a potentiometer e.g. B. brought by the electromagnetic servomotor into a defined open position.
  • 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 warm or in exhaust gas cooling with the help of heat exchangers to reduce NOx emissions, soot, paint and condensate are deposited in the area of the exhaust gas recirculation valve.
  • the object of the invention is to avoid this costly and environmentally harmful disturbance of the exhaust gas recirculation system.
  • the exhaust gas recirculation valve 1 is mounted on a suction pipe, not shown, in such a way that the exhaust gas inlet 2 is arranged in a chamber which is separate from the outlets 3.
  • a coil 4 is arranged in the drive head 5. This interacts with an armature 6, which is operatively connected to a valve rod 9 carrying the valve plate 8 via the respective latching elements 18, 21, 23, 24
  • the armature 6 interacts with a device 10 for position feedback, the output of which is fed to a computer (not shown) which processes further operating parameters and which determines the opening adjustment of the exhaust gas recirculation valve and thus the amount of exhaust gas recirculated.
  • 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. In order to ensure that the exhaust gas recirculation valve can be opened even when the valve disc and valve seat are stuck, the valve operates as described below.
  • the plunger 15 in the embodiment according to FIG. 1 has a reduced cross section 16, in which radially at least one element 18 loaded by a spring 17, which can also be designed as a ball, engages.
  • the head 19 of the plunger 15 directed against the shoulder 14 is for reduced cross section 16 z.
  • B is conical and represents a run-up path for the element 18.
  • the magnet 4 To overcome the forces of the spring 7, 17, the magnet 4 must generate a correspondingly high force.
  • valve head 13 follows the plunger 15 or the armature 6, depending on the current applied to the magnet coil 4, by means of the non-positive connection by means of spring 17 and element 18.
  • valve head 13 and plunger 15 After breaking the bond, valve head 13 and plunger 15 return to their normal position due to the spring 7 after the current has been switched off. If the bond is not released the first time it hits, then after the current has been switched off (armature returns to the starting position due to spring 17), it can be repeated Repeat this process ("hammering"). This hammering continues until the bond between valve plate 8 and valve seat 11 is released.
  • the locking position is generated by a permanent magnet 21, which acts on a collar 22 of the plunger 15, and on the other hand by a plate spring 23 which yields at a predetermined force or a bow spring 24.
  • the plate spring 23 and the residual force of the magnet 21 simultaneously fulfill the function of the return spring 7.
  • the drive head 5 can be designed as a known pneumatic servomotor, which is divided into two chambers by a membrane and an attachment attached to the membrane plates, the effect of the armature 6 while storing the kinetic energy the acceleration takes over and acts on the head 19 of the plunger 15 as soon as the working chamber controlled by a valve is subjected to negative pressure.
  • the membrane With atmospheric ventilation of the working chamber, the membrane returns to the starting position under the action of the spring 12 and the process can be repeated.
  • the working chamber must be arranged on the side of the drive head 5 facing the valve rod 9 and the atmosphere-ventilated chamber must be opposite.
  • this breakaway process described can be used after a corresponding intake manifold vacuum has built up after the first revolutions after starting the internal combustion engine.
  • the vacuum can also be generated by a mechanically or electromotively driven vacuum pump.
  • the exhaust gas recirculation valve be it electromagnetically or pneumatically driven, works like a valve known from the prior art.

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)
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 true EP0952331A2 (fr) 1999-10-27
EP0952331A3 EP0952331A3 (fr) 2000-07-05
EP0952331B1 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)

Cited By (4)

* 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
EP1288481A3 (fr) * 2001-09-04 2004-09-01 Pierburg GmbH Actionneur électromagnétique
EP3627016A1 (fr) * 2018-09-19 2020-03-25 Continental Automotive GmbH Soupape
EP3798428B1 (fr) * 2019-09-30 2025-06-18 RD Estate GmbH & Co. KG Soupape de commande et / ou de régulation d'un flux de fluide

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4338192A1 (de) 1993-11-09 1995-05-11 Pierburg Gmbh Elektromagnetisches Steuerventil für Abgasrückführung

Family Cites Families (3)

* 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
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4338192A1 (de) 1993-11-09 1995-05-11 Pierburg Gmbh Elektromagnetisches Steuerventil für Abgasrückführung

Cited By (5)

* 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
EP1201907A1 (fr) * 2000-10-25 2002-05-02 Delphi Technologies, Inc. Soupape der recyclage de gaz d'échappement pour un moteur à combustion interne
EP1288481A3 (fr) * 2001-09-04 2004-09-01 Pierburg GmbH Actionneur électromagnétique
EP3627016A1 (fr) * 2018-09-19 2020-03-25 Continental Automotive GmbH Soupape
EP3798428B1 (fr) * 2019-09-30 2025-06-18 RD Estate GmbH & Co. KG Soupape de commande et / ou de régulation d'un flux de fluide

Also Published As

Publication number Publication date
DE59906150D1 (de) 2003-08-07
DE19817740A1 (de) 1999-10-28
EP0952331B1 (fr) 2003-07-02
EP0952331A3 (fr) 2000-07-05

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