EP0635630A1 - Verfahren zur Steuerung einer Brennkraftmaschine - Google Patents

Verfahren zur Steuerung einer Brennkraftmaschine Download PDF

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Publication number
EP0635630A1
EP0635630A1 EP94401531A EP94401531A EP0635630A1 EP 0635630 A1 EP0635630 A1 EP 0635630A1 EP 94401531 A EP94401531 A EP 94401531A EP 94401531 A EP94401531 A EP 94401531A EP 0635630 A1 EP0635630 A1 EP 0635630A1
Authority
EP
European Patent Office
Prior art keywords
engine
controlling
absence
internal combustion
combustion engine
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.)
Ceased
Application number
EP94401531A
Other languages
English (en)
French (fr)
Inventor
Francis Cogneville
Pascal Jully
Philippe Tretout
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 SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
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 SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Publication of EP0635630A1 publication Critical patent/EP0635630A1/de
Ceased 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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2409—Addressing techniques specially adapted therefor
    • F02D41/2422—Selective use of one or more tables

Definitions

  • the present invention relates to a control method designed for injecting fuel and / or igniting an internal combustion engine fitted in particular to a motor vehicle.
  • the present invention relates more particularly to a method for selecting strategies for controlling a combustion engine, as a function of the nature of the energy consuming members driven by the latter.
  • the object of the present invention is therefore to reduce the costly diversity of electronic engine control systems which can be fitted to motor vehicles by proposing a single electronic control system capable of appropriately controlling the operation of the engine, whatever the driven organs. by the engine.
  • the control method according to the invention relates to an internal combustion engine intended in particular to equip a motor vehicle.
  • This engine comprises an electronic control system comprising a central unit, a random access memory, read-only memories, analog-digital converters, and various input and output interfaces.
  • the method of controlling an internal combustion engine is characterized in that it consists on the one hand, in recognizing the presence or absence of at least one member predetermined influencing the operation of the engine and fitted as an option on the vehicle and on the other hand, to be chosen from a plurality of predefined strategies for controlling fuel injection and / or igniting the engine spark plugs corresponding to the presence or not on the vehicle of this optional unit, the appropriate strategy for controlling the engine.
  • the recognition of the presence or absence of this optional member is effected by the analysis of the signals received at the input of the engine control system reserved for communication messages between said member and the engine control system.
  • the recognition of the presence or absence of this optional member is operated under predetermined conditions of engine operation.
  • the engine control strategy adopted is chosen arbitrarily.
  • the recognition of the presence or absence of the optional member is operated at each start of the engine.
  • each recognition of the presence or absence of the optional member is systematically compared with the previous recognitions, so as to detect possible malfunctions.
  • the optional member is constituted by an automatic gear change mechanism.
  • Figure 1 schematically shows a drive system of a motor vehicle comprising an internal combustion engine associated with a transmission system comprising a gear change mechanism.
  • This mechanism can be, depending on the option chosen, a manual gearbox or an automatic gearbox.
  • the control method according to the invention which is implemented directly by the electronic control system equipping the motor, therefore relates more particularly in this present example, to the recognition of the type of gear change mechanism and the selection of the strategies for piloting of the corresponding injection and / or ignition.
  • the method which is the subject of the invention is not however limited to this single example and can be used by analogy for the recognition of other optional energy consuming members fitted to the engine, such as an air conditioning device.
  • the effect of the nature of the gearbox on the engine control is indeed important for the engine control, both for taking into account the transmission ratio which is different depending on the nature of the gearbox fitted to the vehicle , that for certain applications specific to the use of an automatic gearbox such as in particular the reduction or blurring of the engine torque when changing the gear ratios, in particular confers the document US-A-5,001,642.
  • the engine control strategies are therefore very different depending on the nature of the gearbox.
  • the invention therefore consists in integrating into the ROM of the electronic system the control strategies corresponding to each of the types of gear change mechanism and by an additional part of strategy to ensure the recognition of the gear change mechanism and selection of the appropriate control strategies.
  • the multi-cylinder internal combustion engine referenced 1 is, in a manner known per se, equipped with a fuel supply device of the electronically controlled multi-point injection type where each cylinder is supplied with fuel by a specific electro-injector 5.
  • the opening of each electro-injector 5 is controlled by an electronic control system 7.
  • the electronic engine control system 7 conventionally comprises a computer of the type comprising a central processing unit CPU (70), a random access memory RAM (71), ROM (ROM) and EEPROM memories (73), analog-digital converters and various input and output interfaces (74). It receives input signals relating to the operation of the engine and in particular those emitted by a crankshaft sensor 4 which allow the tracking of the passage to the top dead center of each of the cylinders, and the determination of the engine rotation speed, as well as the operation of the various organs interacting with the engine. It performs operations and generates output signals intended in particular for injectors 5.
  • a computer of the type comprising a central processing unit CPU (70), a random access memory RAM (71), ROM (ROM) and EEPROM memories (73), analog-digital converters and various input and output interfaces (74). It receives input signals relating to the operation of the engine and in particular those emitted by a crankshaft sensor 4 which allow the tracking of the passage to the top dead center of each of
  • the electronic control system 7 are therefore stored two series of strategies and fundamental parameters for the optimal adjustment of the motor corresponding respectively to the use of a manual gearbox and the use of an automatic gearbox. These parameters are obtained before the engine test bench. These are for example the parameters relating to the fuel injection phase in each of the engine cylinders, the fuel injection duration which corresponds to an amount of fuel injected, or even the ignition phase of the spark plugs not shown.
  • the electronic engine control system according to the invention therefore has all the strategies and parameters corresponding to each of the types of gear change mechanism that can be driven by the engine. It suffices to recognize the mechanism actually driven and to select the control strategies concerned from the various strategies in memory. The electronic engine control system according to the invention is then able to appropriately control the operation of the engine, regardless of the type of gear change mechanism associated with the latter.
  • the recognition of the type of gear change mechanism fitted to the engine is based on the recognition of the presence or absence of the automatic gearbox, its absence signifying the use of a manual gearbox.
  • Recognition of the presence or absence of the automatic transmission is based on the fact that the electronic system systematically includes a specific input 8 reserved for the connection of the electronic engine control system with the electronic control system 6 of the automatic gearbox 2, when such a box has been fitted on the vehicle.
  • This input 8 is used to receive the various communication messages produced by the electronic control system 6 of the gearbox 2 necessary for controlling the injection and / or ignition of the engine 1. It therefore suffices to analyze the communication signals received on this input 8 to deduce therefrom that an automatic transmission is well or not fitted to the engine, and therefore to choose the appropriate control strategies.
  • the level of the signal received at input 8 is therefore read, for example after each engine start.
  • This reading is triggered under predetermined conditions, which depend on the communication protocol adopted between the electronic control system 6 of the automatic gearbox 2 and the engine control system 7, and on the operation of the engine. Its triggering can for example be determined, by the crossing by the speed N supplied by the crankshaft sensor 4 of a speed threshold Nseuil of the engine or, by a given engine operating time. This trigger criterion is determined so that at this instant, the electronic control system 6 of the automatic gearbox 2, transmits to the engine control system.
  • the detection of the reception of a signal on the input 8 is operated for example from a communication interface associated with the input 8.
  • This communication interface operating at a predetermined frequency, is used to decode the data contained in communication messages, in the form of bytes directly interpretable by the central processing unit CPU. To do this, it has a flag making it possible to signal the reception of a datum to the central unit and an associated memory box for storing the corresponding byte. It is therefore sufficient to check the operation of this communication interface to verify whether a message has been sent or not.
  • a more or less elaborate recognition strategy can be adopted to take into account the occurrence of any parasitic phenomena that can be interpreted as receiving data.
  • the value of the FLAGBV register therefore determines the choice of motor control strategies.
  • we can then choose the latter arbitrarily for example the value of FLAGBV recorded during the previous operating cycle and stored in a non-volatile BVSTB memory box.
  • the change in the engine control strategies may take place either during predetermined engine operating ranges or at any point of operation.
  • This BVSTB memory box is also, for example, initialized at the origin and also in the event of erasure, at "01" corresponding to the use of a manual gearbox.
  • Such a method also makes it possible to diagnose a possible failure of the system, such as a break in the connection between the control system 6 and the engine control system 7 or even the erasure of certain memories. To do this, simply compare the value of FLAGBV with that recorded during the previous start-up and stored in the BVSTB memory box. If there is a difference between these values, a SUB_DIAGNOSTIC strategy for operating in degraded mode and / or sending a warning signal to the driver can therefore be triggered.
  • the reading of the level of the signal received on the input 8 can be carried out at a predetermined rate, for example all n starts, with n integer greater than or equal to 2, and no longer systematically after each engine start.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
EP94401531A 1993-07-21 1994-07-05 Verfahren zur Steuerung einer Brennkraftmaschine Ceased EP0635630A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9308944 1993-07-21
FR9308944A FR2708048B1 (fr) 1993-07-21 1993-07-21 Procédé de commande d'un moteur à combustion interne.

Publications (1)

Publication Number Publication Date
EP0635630A1 true EP0635630A1 (de) 1995-01-25

Family

ID=9449456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94401531A Ceased EP0635630A1 (de) 1993-07-21 1994-07-05 Verfahren zur Steuerung einer Brennkraftmaschine

Country Status (2)

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EP (1) EP0635630A1 (de)
FR (1) FR2708048B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119617A1 (de) * 2007-03-30 2008-10-09 Zf Friedrichshafen Ag Steuerungsvorrichtung eines automatisierten stufenschaltgetriebes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59134351A (ja) * 1983-01-21 1984-08-02 Toyota Motor Corp エンジンの電子制御装置における変速機判別方法
US4623976A (en) * 1984-03-16 1986-11-18 Allied Corporation Automatic calibration apparatus for an automotive control system
WO1987006975A1 (en) * 1986-05-15 1987-11-19 Robert Bosch Gmbh Controller for internal combustion engines
EP0425199A2 (de) * 1989-10-27 1991-05-02 Hitachi, Ltd. Kraftfahrzeugsteuerungssystem und Steuerungseinheit dafür
DE4111949A1 (de) * 1991-04-12 1992-10-15 Audi Ag Steuergeraet fuer verbrennungsmotoren

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59134351A (ja) * 1983-01-21 1984-08-02 Toyota Motor Corp エンジンの電子制御装置における変速機判別方法
US4623976A (en) * 1984-03-16 1986-11-18 Allied Corporation Automatic calibration apparatus for an automotive control system
WO1987006975A1 (en) * 1986-05-15 1987-11-19 Robert Bosch Gmbh Controller for internal combustion engines
EP0425199A2 (de) * 1989-10-27 1991-05-02 Hitachi, Ltd. Kraftfahrzeugsteuerungssystem und Steuerungseinheit dafür
DE4111949A1 (de) * 1991-04-12 1992-10-15 Audi Ag Steuergeraet fuer verbrennungsmotoren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 262 (M - 341) 30 November 1984 (1984-11-30) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119617A1 (de) * 2007-03-30 2008-10-09 Zf Friedrichshafen Ag Steuerungsvorrichtung eines automatisierten stufenschaltgetriebes

Also Published As

Publication number Publication date
FR2708048A1 (fr) 1995-01-27
FR2708048B1 (fr) 1995-08-25

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