EP0497677B1 - Verbesserungen zur Abgasrückführeinrichtung - Google Patents

Verbesserungen zur Abgasrückführeinrichtung Download PDF

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Publication number
EP0497677B1
EP0497677B1 EP92400202A EP92400202A EP0497677B1 EP 0497677 B1 EP0497677 B1 EP 0497677B1 EP 92400202 A EP92400202 A EP 92400202A EP 92400202 A EP92400202 A EP 92400202A EP 0497677 B1 EP0497677 B1 EP 0497677B1
Authority
EP
European Patent Office
Prior art keywords
valve
recycling
piston
sump
oil
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
EP92400202A
Other languages
English (en)
French (fr)
Other versions
EP0497677A1 (de
Inventor
Jean Pages
Didier Clarysse
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.)
Safran Electrical and Power SAS
Original Assignee
Labinal SA
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 Labinal SA filed Critical Labinal SA
Publication of EP0497677A1 publication Critical patent/EP0497677A1/de
Application granted granted Critical
Publication of EP0497677B1 publication Critical patent/EP0497677B1/de
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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
    • F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
    • F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
    • 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
    • F02M26/59—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor

Definitions

  • the invention relates to devices which ensure partial recycling of exhaust gases in internal combustion engines of vehicles, devices comprising for this purpose a recycling pipe extending between a point in the exhaust pipe of the engine and a point on its intake manifold, a valve mounted on this pipe and means for controlling and adjusting the opening of this valve according to predetermined criteria (temperatures, compositions of certain gases, etc.), means themselves a computer capable of producing electrical control signals as a function of said criteria.
  • predetermined criteria temperatures, compositions of certain gases, etc.
  • valve is disposed near the intake manifold, that is to say in an area of the engine subjected to less heating than the manifold. exhaust.
  • valve control means In known embodiments of these recycling devices, it has been proposed to make the valve control means understand a hydraulic cylinder whose piston is kinematically linked to the recycling valve and biased in one direction by a spring and whose cylinder is divided into two chambers by said piston and a solenoid valve with at least two mounted positions between the outlet of the oil pump and one of said chambers so that, for one of its positions, said chamber is connected to said outlet, which pushes the piston in a first direction against of the spring return force and that, for the other position of the solenoid valve, said chamber is connected to the casing, the spring then urging the piston in the opposite direction to the previous one (patent DE-A-1 963 235) .
  • the object of the invention is, above all, to eliminate these various drawbacks.
  • the recycling device is essentially characterized in that the solenoid valve comprises four channels connected respectively, the first, to the outlet of the oil pump, the second, to the return of the oil circuit to the casing, the third, to that, of the two chambers of the jack, the maximum filling of which corresponds to the opening maximum of the valve, and the fourth to the other chamber of the jack, and said solenoid valve is arranged in such a way that, for one of its two positions (rest position), the third channel is connected to the second and the fourth , to the first and that for its other position (recycling position), the third channel is connected to the first and the fourth, to the second.
  • the jack is associated with a mechanical spring mounted so as to permanently urge the piston towards its position corresponding to the closing of the valve.
  • the invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.
  • FIGS 1 and 2 schematically show a recycling device established according to the invention, respectively in its two positions of rest and recycling.
  • a recycling pipe 5 extending between a point of the exhaust manifold 3 and a point of the manifold intake 2, line fitted with a valve 6 capable of regulating the recycling rate.
  • the invention relates more particularly to the manner in which the opening of this valve 6 is automatically controlled and regulated from electrical signals produced by the computer 4.
  • this motor 1 is here associated with such a circuit, which comprises a pump 7 for circulation of oil, a casing 8 for collecting this oil and pipe sections 9, 10 and 11 respectively connecting the casing to the pump, the pump to the motor and this motor again to the casing.
  • the rod 14 preferably crosses the intake pipe 2, which allows it to be cooled by the cold fuel mixture introduced into the engine.
  • This measure may prove to be advantageous given the high temperature of the exhaust gases which are recycled at the level of the valve 6 in the pipe 2.
  • This position corresponds to the application of the valve 6 against its seat and therefore to the closing of this valve and to the absence of any recycling of exhaust gas in the engine 1: this is the rest position.
  • the piston 13 is therefore biased towards its position (the highest in the drawing) corresponding to the maximum opening of the valve 6, which corresponds to the maximum recycling position.
  • This command can be of the all-in-nothing type.
  • a spring 19 can be introduced into the chamber P of this variant to ensure the closure of the valve 6, the return force of this spring 19 seconding the hydraulic pressure exerted on the piston 13 for the rest position of the device, or even substituting at this pressure in the event of damage.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (2)

  1. Vorrichtung zur Rückführung der Abgase eines Verbrennungsmotors (1) bestehend aus einer Rückführungsleitung (5), die sich zwischen dem Auslaßrohr (3) und dem Zuführungsrohr (2) erstreckt, einem in dieser Leitung sitzenden Ventil (6) und ein Rechengerät (4) enthaltenden Einrichtungen zum Steuern und Einstellen der Öffnung dieses Ventils, wobei der Motor einen Druckölschmierkreis mit einer Umwälzpumpe (7), einer Sammelwanne (8) und Leitungen (9, 10, 11) enthält, die die Wanne mit der Pumpe, dann mit dem Motor und den Motor erneut mit der Wanne verbinden, und die Steuereinrichtungen des Ventils einen Arbeitszylinder (V), dessen Kolben (13) kinematisch mit dem Rückführungsventil (6) verbunden ist und dessen Zylinder (12) durch den Kolben in zwei Kammern (M, P) unterteilt ist, und ein Elektroventil (E) mit wenigstens zwei Stellungen enthalten, das zwischen dem Ausgang der Ölpumpe und einer der erwähnten Kammern angeordnet ist, dadurch gekennzeichnet, daß das Elektroventil (E) ein Vierwegeventil ist, dessen erster Anschluß (A) mit dem Ausgang der Ölpumpe (7), dessen zweiter Anschluß (B) mit der Rücklaufleitung des Ölkreislaufes zur Wanne (8), dessen dritter Anschluß (C) mit der Kammer (M) des Arbeitszylinders (V), deren maximale Füllung der maximalen Öffnung des Ventils (6) entspricht, und dessen vierter Anschluß (D) mit der anderen Kammer (P) des Arbeitszylinders verbunden ist, und daß das Elektroventil so angeordnet ist, daß in einer der beiden Stellungen, d. h. der Ruhestellung, der dritte Anschluß mit dem zweiten und der vierte Anschluß mit dem ersten und in der anderen Stellung, d. h. der Rückführungsstellung, der dritte Anschluß mit dem ersten und der vierte Anschluß mit dem zweiten Anschluß verbunden ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Arbeitszylinder (V) mit einer mechanischen Feder (19) verbunden ist, die so angebracht ist, daß sie den Kolben (13) ständig in die Schließstellung des Ventils (6) drückt.
EP92400202A 1991-01-29 1992-01-27 Verbesserungen zur Abgasrückführeinrichtung Expired - Lifetime EP0497677B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9100963 1991-01-29
FR9100963A FR2672085B1 (fr) 1991-01-29 1991-01-29 Perfectionnements aux dispositifs de recyclage des gaz d'echgappement.

Publications (2)

Publication Number Publication Date
EP0497677A1 EP0497677A1 (de) 1992-08-05
EP0497677B1 true EP0497677B1 (de) 1994-01-12

Family

ID=9409137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400202A Expired - Lifetime EP0497677B1 (de) 1991-01-29 1992-01-27 Verbesserungen zur Abgasrückführeinrichtung

Country Status (4)

Country Link
EP (1) EP0497677B1 (de)
DE (1) DE69200036T2 (de)
ES (1) ES2048021T3 (de)
FR (1) FR2672085B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106121827B (zh) * 2016-06-28 2018-01-02 中国南方航空工业(集团)有限公司 发动机的滑油系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1963235A1 (de) * 1969-12-17 1971-06-24 Motoren Werke Mannheim Ag Brennkraftmaschine,insbesondere selbstzuendende luftverdichtende Brennkraftmaschine fuer den Betrieb mit zuendunwilligen Brennstoffen
US3868868A (en) * 1973-10-05 1975-03-04 Gen Motors Corp Transmission controlled emission control system
US4020809A (en) * 1975-06-02 1977-05-03 Caterpillar Tractor Co. Exhaust gas recirculation system for a diesel engine

Also Published As

Publication number Publication date
EP0497677A1 (de) 1992-08-05
DE69200036T2 (de) 1994-07-07
FR2672085B1 (fr) 1993-05-14
ES2048021T3 (es) 1994-03-01
DE69200036D1 (de) 1994-02-24
FR2672085A1 (fr) 1992-07-31

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