EP0701049B1 - Procédé de contrÔle d'un moteur à combustion interne - Google Patents

Procédé de contrÔle d'un moteur à combustion interne Download PDF

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Publication number
EP0701049B1
EP0701049B1 EP19950401977 EP95401977A EP0701049B1 EP 0701049 B1 EP0701049 B1 EP 0701049B1 EP 19950401977 EP19950401977 EP 19950401977 EP 95401977 A EP95401977 A EP 95401977A EP 0701049 B1 EP0701049 B1 EP 0701049B1
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
acceleration
engine
fuel
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
EP19950401977
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0701049A1 (fr
Inventor
Patrice Faraon
Philippe Renoux
Frédéric Thomas
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.)
Renault SA
Original Assignee
Renault SA
Regie Nationale des Usines Renault
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 Renault SA, Regie Nationale des Usines Renault filed Critical Renault SA
Publication of EP0701049A1 publication Critical patent/EP0701049A1/fr
Application granted granted Critical
Publication of EP0701049B1 publication Critical patent/EP0701049B1/fr
Anticipated expiration legal-status Critical
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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
    • 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
    • F02D41/10—Introducing corrections for particular operating conditions for acceleration
    • 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
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • F02D41/126—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off transitional corrections at the end of the cut-off period

Definitions

  • the present invention relates to a control method an internal combustion engine fitted to a vehicle automobile of the type comprising an electronic control of the quantity of fuel injected.
  • the invention relates more particularly to a method for controlling an internal combustion engine fitted to a motor vehicle to eliminate possible phenomena torque jerks that can occur under conditions vehicle operating conditions.
  • control type motor control parameters injection electronics i.e. injection time or the ignition advance are adjusted to eliminate oscillations by monitoring the motor torque to the wheels and correcting in the control loop the value of the control parameter (s) chosen as a function the amplitude of the oscillations detected.
  • the aim of the present invention is therefore to propose a method of controlling an internal combustion engine which remedies the disadvantages of the prior art by removing the appearance of sudden and particularly simple.
  • the method according to the invention relates to control an internal combustion engine fitted to a vehicle automobile of the type comprising an electronic control system for fuel injection cooperating with means for detecting engine operating conditions, this process making it possible to calculate the quantity of fuel to be injected according to the conditions of engine operation according to an appropriate formula.
  • the calculation formula is corrected to deplete the amount of fuel injected so as to produce a smooth progressive acceleration (compare with FR-A- 2 414 629).
  • the method for controlling an internal combustion engine object of the invention is characterized in that under acceleration conditions predetermined, the calculation formula is corrected taking into account the estimation of the intensity of the acceleration.
  • a corrective term is introduced in the formula to deplete the amount of fuel as well calculated, this corrective term then being gradually modified to bring the correction to zero.
  • the operated depletion is thus adjusted as well in terms of level and duration, so that maintain a satisfactory response time from the vehicle to the driver acceleration request and so as not increase pollutant emissions.
  • the predetermined acceleration conditions include the acceleration phases occurring following a deceleration phase.
  • the deceleration phase is defined on the one hand, by keeping the accelerator pedal in the position foot raised for a period greater than a first value threshold and secondly, by a vehicle speed automobile greater than a second threshold value.
  • the level and duration of the depletion of the amount of fuel injected take into account engine operating conditions.
  • the intensity of the acceleration is directly deduced from the movement of the accelerator pedal as well as of the speed of this movement.
  • Figure 1 shows an internal combustion engine multicylinder 1 with spark ignition fitted to a vehicle automobile or road and having an electronic system control of the quantity of fuel injected putting in implements the control method according to the invention.
  • Each of the combustion chambers 12 of the engine is supplied with fresh combustion air from a manifold intake 3 conventionally fitted upstream of a throttle valve gas 4 controlling the air flow drawn in by the engine.
  • the manifold 3 is also equipped with a bypass pipe throttle valve 4, fitted with a control valve for engine idling.
  • Air intake in combustion chamber 12 is conventionally governed by the control of a valve intake 11 with rod operated by a system of adapted distribution not shown. As for the injection of fuel, it is operated by an electro-injector 2 fueled at a certain pressure constant and arranged on the air intake circuit, in upstream of the intake valve 11.
  • each electro-injector 2 is controlled by an electronic control system 7, which calculates according to a predetermined formula the quantity of fuel to be injected according to the conditions of operation of motor 1 in the form of a duration opening of the injector 2.
  • the engine control system 7 are memorized basic formulas and parameters for tuning optimal of the engine, these parameters being obtained beforehand at the engine test stand. These are for example the parameters concerning the injection start time or phase injecting fuel into each of the engine chambers, the fuel injection duration which corresponds to a quantity of fuel injected, or even the phase spark plugs.
  • the electronic system 7 conventionally comprises a central processing unit CPU, random access memory RAM, read only memory ROM, analog-to-digital A / D converters, and different input and output interfaces. He receives different input signals characteristic of the motor functioning and organs interacting with it the latter provided by corresponding detection means, performs operations and generates output signals to destination in particular of injectors 2.
  • the different engine control strategies, formulas and parameters or calibrations are stored in ROM.
  • the input signals are those emitted by a crankshaft sensor 8 which allows the tracking of the passage at top dead center of each of the cylinders, and the determination of the engine rotation speed. These signals allow, coupled in particular to those emitted by a camshaft sensor not shown, to phase the instants injection with engine operation.
  • a sensor pressure 9 arranged in the downstream intake manifold throttle valve 6, associated position sensors respectively to the throttle valve 4 and to the idle regulation, as well as sensors for measuring the coolant and air temperature intake, and a wealth sensor, not shown, arranged on the exhaust line of the burnt gases from the engine allowing follow the air fuel ratio.
  • the formula for calculating the amount of fuel is corrected to temporarily deplete the amount of fuel injected so as to limit the engine torque and produce a smooth acceleration.
  • Figure 2 illustrates influence during such accelerations of impoverishment on the torque C transmitted to the vehicle wheels, the curve (I) corresponding to the implementation of the formula without correction while the curve (II) corresponding to the bet implementation of the correction according to the invention.
  • the predetermined acceleration conditions during which correction is implemented according to the invention are the acceleration phases occurring immediately after a deceleration phase.
  • control system 7 has position information of the accelerator pedal either by a suitable sensor or still via the throttle position sensor gas.
  • the deceleration phase is then defined by the recognition of the foot raised position of the pedal accelerator.
  • This corrective term can for example take the form of a multiplicative gain G as shown in figure 3.
  • the gain G is initially brought to a certain predetermined value strictly between “0" and “1”, then it is then gradually reduced to the value "1" by successive increases at each breakeven point High, so as to bring the correction to zero after one adjusted time frame.
  • the initial value then the evolution of the gain G are deduced from predetermined tables taking into account the engine operating conditions including engine speed, manifold pressure values intake, and gearbox gear engaged.
  • the value of the gain G is also adjusted based on an estimate of the intensity of the acceleration deduced from the displacement of the accelerator pedal as well as the speed of this displacement.
  • the engine control system can be applied when ordering a single-point injection. He can also be used for compression ignition engines comprising an electronic device for controlling the amount of fuel injected.

Landscapes

  • 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)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP19950401977 1994-09-06 1995-08-31 Procédé de contrÔle d'un moteur à combustion interne Expired - Lifetime EP0701049B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9410663 1994-09-06
FR9410663A FR2724203A1 (fr) 1994-09-06 1994-09-06 Procede de controle d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0701049A1 EP0701049A1 (fr) 1996-03-13
EP0701049B1 true EP0701049B1 (fr) 1999-03-24

Family

ID=9466729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950401977 Expired - Lifetime EP0701049B1 (fr) 1994-09-06 1995-08-31 Procédé de contrÔle d'un moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP0701049B1 (enrdf_load_stackoverflow)
DE (1) DE69508504T2 (enrdf_load_stackoverflow)
FR (1) FR2724203A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016221285B3 (de) * 2016-10-28 2018-05-03 Robert Bosch Gmbh Verfahren zur Schubüberwachung eines verbrennungsmotorischen Antriebs in einem Kraftfahrzeug

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2801790A1 (de) * 1978-01-17 1979-07-19 Bosch Gmbh Robert Verfahren und einrichtung zur steuerung der kraftstoffzufuhr zu einer brennkraftmaschine
JPS54108127A (en) * 1978-02-13 1979-08-24 Toyota Motor Corp Electronically-controlled fuel injector
JPS59183039A (ja) * 1983-03-31 1984-10-18 Toyota Motor Corp 車両用エンジンの燃料制御方法
JPS62182454A (ja) * 1985-12-26 1987-08-10 Honda Motor Co Ltd 内燃エンジンの空燃比制御方法
WO1990006441A1 (en) 1988-12-06 1990-06-14 Robert Bosch Gmbh Method and apparatus for controlling the torque of an engine
JP2751571B2 (ja) 1990-06-04 1998-05-18 トヨタ自動車株式会社 車両用内燃機関の燃料噴射装置
US5119781A (en) * 1991-02-28 1992-06-09 General Motors Corporation Control of engine fuel injection during transitional periods associated with deceleration fuel cut-off

Also Published As

Publication number Publication date
FR2724203A1 (fr) 1996-03-08
DE69508504T2 (de) 1999-10-28
FR2724203B1 (enrdf_load_stackoverflow) 1997-02-07
EP0701049A1 (fr) 1996-03-13
DE69508504D1 (de) 1999-04-29

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