EP0136675A2 - Mode de recyclage des gaz d'échappement sur un moteur à combustion - Google Patents

Mode de recyclage des gaz d'échappement sur un moteur à combustion Download PDF

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Publication number
EP0136675A2
EP0136675A2 EP84111634A EP84111634A EP0136675A2 EP 0136675 A2 EP0136675 A2 EP 0136675A2 EP 84111634 A EP84111634 A EP 84111634A EP 84111634 A EP84111634 A EP 84111634A EP 0136675 A2 EP0136675 A2 EP 0136675A2
Authority
EP
European Patent Office
Prior art keywords
load
exhaust gas
switched
combustion engine
change
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
EP84111634A
Other languages
German (de)
English (en)
Other versions
EP0136675B1 (fr
EP0136675A3 (fr
Inventor
Michael Dipl.-Ing. Preis
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0136675A2 publication Critical patent/EP0136675A2/fr
Publication of EP0136675A3 publication Critical patent/EP0136675A3/xx
Application granted granted Critical
Publication of EP0136675B1 publication Critical patent/EP0136675B1/fr
Expired 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

Definitions

  • the invention relates to a method for exhaust gas recirculation in an internal combustion engine with means for preventing the smoke burst by temporarily reducing or interrupting the exhaust gas recirculation depending on the load on the internal combustion engine.
  • the second method in turn has the serious disadvantage that the motor vehicle can only be accelerated with a delay due to the delayed reduction in the quantity of fuel supplied.
  • the invention has for its object to provide a method of the type mentioned that safely avoids the smoke burst without negative impact on the acceleration behavior of the motor vehicle.
  • the invention solves this problem in that the exhaust gas recirculation is interrupted during operation of the internal combustion engine with a load that is different from the no-load and at least approximately the same and is only switched on when there is a predetermined change in load.
  • the invention means that the operating phases in which the exhaust gas recirculation is carried out are interchanged.
  • Exhaust gas recirculation particularly in the acceleration phase of the motor vehicle, takes place from an operating state in which exhaust gas recirculation does not take place. There is therefore no exhaust gas present at the start of acceleration that is fed to the combustion chambers.
  • Switching on the exhaust gas recirculation only in the acceleration phase and without affecting the change in the amount of fuel supplied also has the advantage that the internal combustion engine responds instantaneously to the changes in the accelerator pedal position and gives the motor vehicle optimum acceleration behavior.
  • a further improvement of the method can be achieved by delayed switching on of the exhaust gas recirculation in load change phases of the internal combustion engine.
  • the exhaust gas recirculation is only switched on when the change in load has persisted for a certain time and the motor vehicle has already accelerated significantly.
  • a further improvement of the method consists in switching off the exhaust gas recirculation again when the change in load is again below the value critical for switching on.
  • the exhaust gas recirculation a predetermined time after it has been switched on has the advantage that the exhaust gas recirculation can be adapted well to the course of the load on the internal combustion engine. This adaptation can be further improved by delaying the switching off of the exhaust gas recirculation.
  • the load on the internal combustion engine or its change can be determined from the position of an actuator for the amount of fuel or air supplied to the internal combustion engine. This results in a quick reaction of the means for controlling the exhaust gas recirculation to the load behavior of the internal combustion engine.
  • Curve 1 shows the load profile of a diesel internal combustion engine. This is determined, for example, with the aid of a potentiometer, which converts the rotary movement of a rotatable adjustment lever of an injection pump (not shown in detail) into an analog electrical voltage U 1 as a function f ( ⁇ ) of the angle of rotation ⁇ of this adjustment lever (curve 1).
  • the voltage U is differentiated electrically according to time and results in a curve 2 for a voltage U 2 , the relationship of which to the voltage U 1 is indicated in the drawing.
  • a trigger band is entered for curve 2 in both directions, which is given by parallel straight lines 3 and 4. If curve 2 exceeds or reaches the trigger band when the exhaust gas recirculation is initially switched off, the exhaust gas recirculation is switched on with a delay.
  • the delay is triggered here by a timer triggered when the straight line (interface 5) is exceeded with a relatively short switching time t 2 .

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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)
EP84111634A 1983-10-01 1984-09-28 Mode de recyclage des gaz d'échappement sur un moteur à combustion Expired EP0136675B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3335770 1983-10-01
DE19833335770 DE3335770A1 (de) 1983-10-01 1983-10-01 Verfahren zur abgasrueckfuehrung bei einer brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP0136675A2 true EP0136675A2 (fr) 1985-04-10
EP0136675A3 EP0136675A3 (fr) 1985-05-15
EP0136675B1 EP0136675B1 (fr) 1988-12-14

Family

ID=6210739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111634A Expired EP0136675B1 (fr) 1983-10-01 1984-09-28 Mode de recyclage des gaz d'échappement sur un moteur à combustion

Country Status (2)

Country Link
EP (1) EP0136675B1 (fr)
DE (2) DE3335770A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130853A1 (de) * 1990-09-29 1992-04-02 Volkswagen Ag Verfahren zur steuerung der rueckgefuehrten abgasmenge bei einer brennkraftmaschine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211437B (de) * 1957-10-05 1966-02-24 Maschf Augsburg Nuernberg Ag Nach dem Dieselverfahren arbeitende, atmosphaerische Luft ansaugende Brennkraft-maschine mit einer sich von Leerlauf bis einschliesslich Vollast erstreckenden gesteuerten partiellen Rueckfuehrung von Abgasen
US3605709A (en) * 1969-03-19 1971-09-20 Nissan Motor Vehicular air-pollution preventive system
DE2647062C2 (de) * 1976-10-19 1985-08-08 Klöckner-Humboldt-Deutz AG, 5000 Köln Brennkraftmaschine mit Abgasrückführung
GB2001702B (en) * 1977-07-08 1982-01-13 Lucas Industries Ltd Valve control arrangement
JPS6047460B2 (ja) * 1977-10-19 1985-10-22 トヨタ自動車株式会社 燃料噴射制御装置
DE2801790A1 (de) * 1978-01-17 1979-07-19 Bosch Gmbh Robert Verfahren und einrichtung zur steuerung der kraftstoffzufuhr zu einer brennkraftmaschine
DE2909465A1 (de) * 1979-03-10 1980-09-18 Bosch Gmbh Robert Einrichtung zur steuerung von abgasrueckfuehrmengen bei selbstzuendenden brennkraftmaschinen
US4349004A (en) * 1980-10-22 1982-09-14 Nissan Diesel Kogyo Kabushiki Kaisha Exhaust gas recirculation apparatus for diesel engine
DE3043752C1 (de) * 1980-11-20 1982-11-11 Pierburg Gmbh & Co Kg, 4040 Neuss Verfahren zum Betrieb einer Diesel-Brennkraftmaschine
DE3047036C2 (de) * 1980-12-13 1983-01-20 Pierburg Gmbh & Co Kg, 4040 Neuss Abgasrückführsteuerventil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130853A1 (de) * 1990-09-29 1992-04-02 Volkswagen Ag Verfahren zur steuerung der rueckgefuehrten abgasmenge bei einer brennkraftmaschine
DE4130853C2 (de) * 1990-09-29 1998-09-10 Volkswagen Ag Verfahren zur Steuerung der rückgeführten Abgasmenge bei einer Brennkraftmaschine

Also Published As

Publication number Publication date
EP0136675B1 (fr) 1988-12-14
DE3335770A1 (de) 1985-04-11
DE3475635D1 (en) 1989-01-19
EP0136675A3 (fr) 1985-05-15

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