EP0264332B1 - Verfahren zum Korrigieren der Anreicherung eines Kraftstoffluftgemisches in einem elektronisch geregelten Einspritzverbrennungsmotor - Google Patents

Verfahren zum Korrigieren der Anreicherung eines Kraftstoffluftgemisches in einem elektronisch geregelten Einspritzverbrennungsmotor Download PDF

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EP0264332B1
EP0264332B1 EP87402272A EP87402272A EP0264332B1 EP 0264332 B1 EP0264332 B1 EP 0264332B1 EP 87402272 A EP87402272 A EP 87402272A EP 87402272 A EP87402272 A EP 87402272A EP 0264332 B1 EP0264332 B1 EP 0264332B1
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Prior art keywords
air
engine
temperature
richness
coefficient
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EP87402272A
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English (en)
French (fr)
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EP0264332A1 (de
Inventor
Rémi Lefèvre
Jean-Pierre Lagrue
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Regie Nationale des Usines Renault
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Regie Nationale des Usines Renault
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/068—Introducing corrections for particular operating conditions for engine starting or warming up for warming-up
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/32—Controlling fuel injection of the low pressure type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature

Definitions

  • the invention relates to a method for correcting the richness of an air-fuel mixture admitted into an internal combustion engine, with electronic injection of the pressure-speed type, in order to keep the richness constant as a function of the air temperature. entering the cylinders and whatever the speed and pressure in the intake manifold.
  • the object of the invention is to correct the richness of the air-fuel mixture at the intake so that it is constant as a function of the actual temperature of the air entering the cylinders.
  • the correction of the richness of the air-petrol mixture uses the measurement of this temperature by a probe placed upstream of the throttle body.
  • this correction was unsuitable for certain engine operating points, especially when the air underwent heating between the butterfly and the valves.
  • the technical problem comes from the fact that the air temperature measuring probe does not deliver the actual temperature of the air entering the cylinders.
  • the air is heated by the walls of the intake manifold.
  • a tehrmic exchange takes place between the air circulating in the tubing and the walls and, theoretically, it can be said that the temperature of the air entering the intake manifold undergoes an increase as a function of the temperature of the walls. , the air pressure in the manifold and the engine speed according to which the quantity of air admitted depends.
  • thermocouples placed on the engine intake circuit placed as close to the valves to check the accuracy of the temperature formula thus calculated.
  • the outside air temperature T is given by a probe 1 upstream of the butterfly valve 2.
  • a thermocouple 5 makes it possible to verify that the temperature of the wall of the intake circuit is very close to that of the water T water given by a water temperature probe. It is verified in particular that for high speeds and pressures, the temperature of the air actually entering the cylinders is very close to that of the air outside the vehicle. This is explained by the fact that the admitted air does not have time to warm up along the walls, its flow being large. On the other hand, for engine idling, the actual temperature of the air entering through the valves is close to the temperature of the engine cooling water.
  • This richness correction method has the advantage of being easily applied by the injection computer, since it is a linear calculation from information present in the injection computer (temperatures of air and water, engine speed, pressure).
  • loop coefficient a ci remains constant when the outside air temperature varies, which justifies the use of an air temperature constant at idle on certain engines, and that this coefficient a ci however changes with the engine water temperature.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Claims (2)

1. Verfahren zur Korrektur der Anreicherung eines Kraftstoff-Luft-Gemisches in einem Verbrennungsmotor mit elektronischer Einspritzung vom Typ Druck-Geschwindigkeit, um eine konstante Anreicherung als Funktion der in die Zylinder eintretenden Lufttemperatur zu erzielen, unabhängig von der Drehgeschwindigkeit des Motors und dem Ansaugdruck, wobei der Motor mit einem elektronischen Rechner versehen ist zur Steuerung der Öffnungszeit Ti der Einspritzventile, mit einem Temperaturfühler oberhalb der Drosselklappe versehen ist und mit einem Temperaturfühler für das Motorwasser versehen ist, wobei T; eine Funktion ist der Wassertemperatur des Motors, der Lufttemperatur, der Drehgeschwindigkeit des Motors und des Ansaugdrucks, dadurch gekennzeichnet, daß die Korrektur multiplikativ ist und die folgende Form aufweist:
Figure imgb0015
mit:
Figure imgb0016
Figure imgb0017
Figure imgb0018
wobei Tin die nominale Öffnungszeit ist, die als Funktion der wichtigen und zusätzlichen Betriebsparameter des Motors berechnet worden ist,
- T' die Temperatur der tatsächlich in die Zylinder eintretenden Luft ist,
- T die vom Rechner gemessene Lufttemperatur ist,
- Teau die Wassertemperatur des Motors ist,
- k1 ein Funktionskoeffizient für die Motorgeschwindigkeit ist, die mittels Interpolation aus einer Tabelle mit x Punkten erhalten ist,
- k2 ein Koeffizient ist für den Einfluß des Ansaugdrucks, der durch lineare Interpolation in einer Tabelle mit x Punkten erhalten ist,
- k3 ein konstanter Koeffizient ist, der charakteristisch für den Motoreinlaß ist,
- a air der Korrekturfaktor ist für die Anreicherung als Funktion der Lufttemperatur.
2. Verfahren zur Korrektur nach Anspruch 1, dadurch gekennzeichnet, daß es angewendet wird auf einen Motor, der mit einer Steuerung mittels Sauerstoffsonde versehen ist.
EP87402272A 1986-10-14 1987-10-13 Verfahren zum Korrigieren der Anreicherung eines Kraftstoffluftgemisches in einem elektronisch geregelten Einspritzverbrennungsmotor Expired - Lifetime EP0264332B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8614252 1986-10-14
FR8614252A FR2605050B1 (fr) 1986-10-14 1986-10-14 Procede de correction de la richesse d'un melange air-carburant admis dans un moteur a combustion interne, a injection electronique.

Publications (2)

Publication Number Publication Date
EP0264332A1 EP0264332A1 (de) 1988-04-20
EP0264332B1 true EP0264332B1 (de) 1990-12-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402272A Expired - Lifetime EP0264332B1 (de) 1986-10-14 1987-10-13 Verfahren zum Korrigieren der Anreicherung eines Kraftstoffluftgemisches in einem elektronisch geregelten Einspritzverbrennungsmotor

Country Status (6)

Country Link
US (1) US4815435A (de)
EP (1) EP0264332B1 (de)
CA (1) CA1290838C (de)
DE (1) DE3766790D1 (de)
ES (1) ES2019396B3 (de)
FR (1) FR2605050B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19817788C2 (de) * 1997-04-22 2003-02-20 Unisia Jecs Corp Vorrichtung und Verfahren zum Steuern der Brennstoffeinspritzung bei einem Verbrennungskraftmotor

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974563A (en) * 1988-05-23 1990-12-04 Toyota Jidosha Kabushiki Kaisha Apparatus for estimating intake air amount
JP2707674B2 (ja) * 1989-01-20 1998-02-04 株式会社デンソー 空燃比制御方法
ES2071104T3 (es) * 1989-07-14 1995-06-16 Siemens Ag Procedimiento para el control de un motor de combustion interna.
US5113832A (en) * 1991-05-23 1992-05-19 Pacer Industries, Inc. Method for air density compensation of internal combustion engines
DE19636451B4 (de) * 1996-09-07 2010-06-10 Robert Bosch Gmbh Einrichtung zum Steuern der einer Brennkraftmaschine zuzuführenden Kraftstoffmenge
DE19739901B4 (de) * 1997-09-11 2008-04-17 Robert Bosch Gmbh Verfahren und Einrichtung zur Steuerung einer Brennkraftmaschine abhängig von Betriebskenngrößen
CN111650171B (zh) * 2020-07-03 2023-08-18 中国科学院工程热物理研究所 一种燃油喷嘴高温高压燃油浓度场定量测量及校正方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE567344A (de) * 1957-05-04
US3824967A (en) * 1972-10-30 1974-07-23 Gen Motors Corp Electronic fuel injection system
JPS5888436A (ja) * 1981-11-19 1983-05-26 Honda Motor Co Ltd 吸気温度による補正機能を有する内燃エンジンの空燃比補正装置
JPS5888435A (ja) * 1981-11-19 1983-05-26 Honda Motor Co Ltd 吸気温度による補正機能を有する内燃エンジンの空燃比補正装置
US4499879A (en) * 1983-04-28 1985-02-19 General Motors Corporation Fuel supply system for an internal combustion engine
US4594986A (en) * 1984-01-20 1986-06-17 Mazda Motor Corporation Fuel supply arrangement for internal combustion engine
JPH0670394B2 (ja) * 1985-08-20 1994-09-07 三菱電機株式会社 エンジンの燃料制御装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
XXI FISITA Congress, Belgrade, 2.-6. June, 1986, page 1.111-1.112 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19817788C2 (de) * 1997-04-22 2003-02-20 Unisia Jecs Corp Vorrichtung und Verfahren zum Steuern der Brennstoffeinspritzung bei einem Verbrennungskraftmotor

Also Published As

Publication number Publication date
EP0264332A1 (de) 1988-04-20
FR2605050B1 (fr) 1991-01-11
CA1290838C (fr) 1991-10-15
FR2605050A1 (fr) 1988-04-15
US4815435A (en) 1989-03-28
ES2019396B3 (es) 1991-06-16
DE3766790D1 (de) 1991-01-31

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