WO2003040536A1 - Procede et dispositif pour la lecture de donnees d'un systeme de dosage de carburant - Google Patents

Procede et dispositif pour la lecture de donnees d'un systeme de dosage de carburant Download PDF

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Publication number
WO2003040536A1
WO2003040536A1 PCT/DE2002/002920 DE0202920W WO03040536A1 WO 2003040536 A1 WO2003040536 A1 WO 2003040536A1 DE 0202920 W DE0202920 W DE 0202920W WO 03040536 A1 WO03040536 A1 WO 03040536A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
injector
fuel
combustion engine
internal combustion
Prior art date
Application number
PCT/DE2002/002920
Other languages
German (de)
English (en)
Inventor
Uwe Liskow
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2003040536A1 publication Critical patent/WO2003040536A1/fr

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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
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2464—Characteristics of actuators
    • 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
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2432—Methods of calibration
    • 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
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2464—Characteristics of actuators
    • F02D41/2467—Characteristics of actuators for injectors

Definitions

  • the invention relates to a method for reading out data from a fuel metering system for an internal combustion engine of a motor vehicle, in particular a fuel pump or an injector, wherein at least one electronic component is associated with data from the fuel pump and / or the injector, and the data from a control unit of the motor vehicle in the Control of the internal combustion engine of the motor vehicle are taken into account.
  • the invention further relates to a corresponding device for reading out data
  • Fuel metering system for an internal combustion engine of a motor vehicle is provided.
  • GB 2,118,325 A a fuel supply system for an internal combustion engine is known, in which a pump is subjected to a test run during manufacture.
  • the data that result during the test run are stored in a memory that is integrated in or on the pump.
  • the memory can be a read-only memory (ROM) or a network of discrete components be executed.
  • a network of discrete electrical components can be, for example, a network of electrical resistors.
  • GB 2,118,325 A discloses, on the one hand, that the test data stored in the memory are permanently connected to a control system, so that the data can be read from the memory by the control unit during operation of the internal combustion engine. Alternatively, it is provided that the data are read out from the memory by the control device using a special cable. This special cable can be removed after a first readout.
  • DE 35 10 157 AI discloses an electromagnetically actuated fuel injection valve.
  • the fuel injection valve is intended for an internal combustion engine and is controlled by an injection electronics.
  • the current pulse output by the injection electronics opens the fuel injection valve depending on the amount of air.
  • a current pulse corresponds to a predetermined duration of a corresponding amount of fuel, which is based on an identifier of the
  • Fuel injection valve ie depends on deviations from a target identifier.
  • An electrical resistor is arranged on each fuel injection valve, which is dimensioned in proportion to the characteristic variable or the deviation from the target characteristic variable of the fuel injection valve.
  • the resistance is connected to the injection electronics in order to influence the injection time in order to compensate for deviations in the identification from a desired variable. According to DE 35 10 157 AI, it is possible to dispense with a very narrowly tolerated mechanical adjustment and instead to record the so-called identifier of each completed fuel injection valve and code it with a corresponding resistor.
  • the resistance is arranged in an insulating part of the fuel injector and is in permanent electrical contact with the injection electronics.
  • an electrical circuit for storing / reading technical data of a fuel metering system is known.
  • a capacitor and / or a resistor is provided on the fuel metering system, the characteristic value of which is assigned to the technical data to be read out or to be stored.
  • the capacitor and / or resistor is connected to evaluation electronics for measuring the characteristic value of the capacitor and / or the resistor.
  • the capacitor and / or resistor is connected to the electrical vehicle ground.
  • the value of the resistor or capacitor used can be determined in accordance with the selected evaluation electronics.
  • the evaluation electronics can be designed to generate a pulse and to evaluate a step response received.
  • current pulses from other sources can also be evaluated in a corresponding manner.
  • evaluation electronics with an alternating current source which can evaluate an alternating voltage that occurs.
  • the unpublished German patent application DE 100 07 691.2-26 describes a method for storing and / or reading out data from a fuel metering system, in particular a fuel pump or an injector, wherein at least one electronic component is associated with data relating to the fuel and / or the injector, the data being provided by a control unit be taken into account when controlling the fuel metering system.
  • the component resistor, capacitor or EPROM
  • the component is mechanically and / or electrically connected to the control unit during a first period and mechanically and / or electrically separated from the control unit and / or the fuel metering unit during a second period. This is achieved by means of a two-latch plug connection in which a corresponding resistor is integrated.
  • the first step or latching of the connector is used to read out the data and the second latching is used for normal operation.
  • the plug Before the internal combustion engine or the motor vehicle is started up for the first time, the plug is first brought into the first detent and the characteristic data are transferred to a vehicle control unit. In the second latching position, which is used subsequently, there is no connection between the electronic component and the motor vehicle control unit.
  • An alternative solution provides that a special program runs before the first start-up of the engine or the motor vehicle, which applies a very high current and / or a very high voltage value to the classification resistor, which leads to an independent severing of a predetermined breaking point similar to a fuse leads.
  • DE 33 36 028 C3 discloses a device for influencing control variables of an internal combustion engine.
  • the smooth running of the engine is influenced by cylinder-specific smooth running setpoint and smooth running actual values, combined with the corresponding control.
  • a cylinder-specific control signal is specified as a function of the difference between the set running and actual running values.
  • the actual running value is a variable that represents a measure of the time between two combustion times.
  • the smoothness setpoint is an average of the smoothness values of all cylinders.
  • Fuel injection quantity In the context of DE 33 36 028 C3, the following parameters are used that influence the combustion of the internal combustion engine: fuel metering, exhaust gas recirculation, injection timing, injection duration, fuel air ratio and ignition timing.
  • an electronic control device by means of which the cylinder-specific torque contributions can be equalized in a multi-cylinder internal combustion engine.
  • the amount of fuel injected, the ignition timing (in the case of a gasoline engine), the exhaust gas recirculation rate or the injection position are varied in order to adjust the cylinder-specific torque contributions.
  • the determination of the cylinder-specific torque contributions can be done by evaluating the time course of the rotary movement of the crankshaft or the camshaft, individual segment times being recorded. Alternatively, smoothness values can be used for the
  • Cylinder equality is to minimize the uneven running values with a control concept.
  • appropriate interventions can be carried out on the engine.
  • injector coking can cause the torque of the corresponding cylinder to be too low.
  • the corresponding cylinder runs too lean in this case.
  • the main component of the control function are according to DE 198 28 279 AI cylinder-specific PI controllers.
  • cylinder equalization is used to compensate for the torque differences between individual cylinders while an internal combustion engine is operating.
  • torque differences between the individual cylinders can occur, for example, on account of the existing scatter of injection valves (manufacturing inaccuracies that cannot be avoided) or in the case of injection valve coking.
  • a control system for cylinder equalization determines the torque deviations between the individual cylinders on the basis of rough running values during the operation of the
  • the cylinder torques are preferably assimilated in a shift operation by adapting the cylinder-specific injection quantity of fuel in the form of a dynamic control.
  • the cylinder equalization serves for the cylinder-specific correction of the injection times as a function of the respectively occurring cylinder torques, the corrected injection times in turn have an influence on the cylinder torque. There is therefore a reaction of the injection times to the cylinder torque, so that torque differences between the cylinders can be regulated to zero by means of the control of the cylinder equalization.
  • the engine may be damaged in the medium term due to the different torque contributions of the individual cylinders.
  • the object is achieved by a method for reading out data from a fuel metering system for a
  • Internal combustion engine of a motor vehicle in particular a fuel pump and / or an injector, data of the fuel pump and / or the injector being assigned to at least one electronic component, the data being taken into account by a control unit of the motor vehicle when controlling the internal combustion engine of the motor vehicle, and operation the internal combustion engine is prevented as long as the data are not read out by the control unit.
  • This data can be used, for example, for map corrections or for pre-control of the cylinder equalization function. This ensures that the
  • Cylinder equalization function runs particularly reliably and with small control deviations.
  • the preferred development of the method according to the invention provides that the data are read out when the control unit is started up and stored in the control unit.
  • a first start-up is to be understood as an initial start of the control unit or an operation after an exchange of the control unit and / or the fuel pump (s) and / or the injectors. This further development ensures that the internal combustion engine can never under any circumstances start operating without first taking the data into account.
  • the cylinder equalization control is basically precontrolled. This has the particular advantage that the regulation of the cylinder equalization function has to carry out control interventions to a far lesser extent than would be necessary without the data according to the invention being taken into account.
  • the further consideration of the data in the case of diagnostic and / or error routines in such a way that the cylinder equalization function is monitored for allowable amount-related swings in the control can thus be carried out much more precisely. For example, if the amplitude of the control value of the cylinder equalization function is too great, it can be recognized that an injection valve or an injector is dirty or coked or its function is generally impaired. For diagnoses of this kind, it is very important that the basic function of the cylinder equalization function works exactly.
  • a further development according to the invention provides that the data in the event of service, for example during a visit to the workshop and / or when the Fuel pump or one of the injectors can be entered manually, in particular via a service interface, and the control unit is initialized so that the data is read again.
  • This further development according to the invention makes it possible to replace individual injectors and / or the fuel pump, which is currently not possible in practice. As a rule, all injectors are currently being replaced in the case of a defective injector, since there is no possibility of taking the data of the injector into account in the control unit of the motor vehicle. After the exchange, the cylinder equalization function continues to operate reliably.
  • the data to be entered in the case of an exchange
  • a ground connection of the electronic component is only established immediately before the fuel pump (s) and / or the injector is installed. This effectively prevents the electronic component from being destroyed by increased electrical and / or thermal stress even before installation in the motor vehicle in the event of test bench tests of the fuel pump or the injector. This can be avoided if the connection, for example of a trim resistor to the housing (ground), is activated shortly before use in the motor vehicle or in engine assembly and is previously interrupted.
  • the electrical connection to the housing ground can be made, for example, by a mechanical switch contact or by a metal bolt that is hammered in.
  • the object is further achieved by a device according to the invention for reading out data
  • Fuel metering system for an internal combustion engine of a motor vehicle which has appropriate means to carry out the method according to the invention.
  • Figure 1 shows an inventive device
  • Figure 2 shows a method according to the invention.
  • a direct-injection internal combustion engine 1 is shown in FIG.
  • the method according to the invention and the device according to the invention are not limited to a direct-injection internal combustion engine, but can also be used with any intake-manifold-injection internal combustion engine.
  • a piston 2 can be moved back and forth in a cylinder 3.
  • the cylinder 3 is provided with a combustion chamber 4, on which an intake pipe 6 and an exhaust pipe 7 are closed via valves 5. Furthermore, an injection valve 8 which can be controlled with a signal TI and a spark plug 9 which can be controlled with a signal ZW are connected to the combustion chamber 4. The signals TI and ZW are transmitted from a control unit 16 to the injection valve / injector 8 or the spark plug 9.
  • the intake pipe 6 is provided with an air mass sensor 10 and the exhaust pipe 7 with a lambda sensor 11.
  • the air mass sensor 10 measures the air mass of the fresh air supplied to the intake pipe 6 and generates a signal LM as a function thereof.
  • the lambda sensor 11 measures the oxygen content of the exhaust gas in the exhaust pipe 7 and generates a signal lambda as a function thereof.
  • the signals of the air mass sensor 10 and the lambda sensor 11 are supplied to the control unit 16.
  • a throttle valve 12 is accommodated in the intake pipe 6, the rotational position of which can be set by the control unit 16 by means of a signal DK.
  • the throttle valve 12 In a first operating mode, the stratified operation of the internal combustion engine 1, the throttle valve 12 is opened wide.
  • the fuel is from that
  • Injection valve / injector 8 is injected into combustion chamber 4 during a compression phase caused by piston 2. Then the fuel is ignited with the aid of the spark plug 9, so that the piston 2 is driven in the now following working phase by the expansion of the ignited fuel.
  • the throttle valve 12 is partially opened or closed depending on the desired air mass supplied.
  • the fuel is injected into the combustion chamber 4 by the injection valve 8 during an induction phase caused by the piston 2.
  • the injected fuel is swirled by the air drawn in at the same time and is thus distributed essentially uniformly in the combustion chamber 4.
  • the fuel / air mixture is then compressed during the compression phase in order to then be ignited by the spark plug 9.
  • the piston 2 is driven by the expansion of the ignited fuel.
  • the driven piston sets a crankshaft 14 into a rotary movement, via which the wheels of the motor vehicle are ultimately driven.
  • a gearwheel 13 is arranged on the crankshaft 14, the teeth of which are from a speed sensor 15 arranged directly opposite one another be scanned.
  • the speed sensor 15 generates a signal from which the speed n of the crankshaft 14 is determined and transmits this signal N to the control device 16.
  • the torque differences or uneven running values can be determined based on the time differences between the individual pulses of the signal n individual cylinders can be inferred.
  • This input data for the control unit 16 is the basis for a subsequent cylinder equalization function.
  • a cylinder equalization function can be carried out on the basis of a determined uneven running.
  • the fuel mass injected into the combustion chamber by the injection valve 8 in stratified operation and in homogeneous operation is controlled and / or regulated by the control unit 16, in particular with regard to low fuel consumption and / or low pollutant development.
  • the injection valve 8 is controlled by the control unit 16, taking into account specific data of the injector 8, with a view to optimum smooth running.
  • the control unit 16 is provided with a microprocessor, which has stored a program in a storage medium, in particular in a read-only memory (ROM), which is suitable for carrying out the entire control and / or regulation of the internal combustion engine 1.
  • ROM read-only memory
  • the control device 16 is acted upon by input signals which represent operating variables of the internal combustion engine measured by means of sensors.
  • the control unit 16 is connected to the air mass sensor 10, the lambda sensor 11 and the speed sensor 15.
  • the control unit 16 is connected to an accelerator pedal sensor 17, which generates a signal FP that indicates the position of an accelerator pedal that can be actuated by a driver and thus by the driver indicates requested moment.
  • the control unit 16 generates output signals with which the behavior of the internal combustion engine 1 can be influenced via actuators in accordance with the desired control and / or regulation.
  • the control unit 16 is connected to the injection valve 8, the spark plug 9 and the throttle valve 12 and generates the signals TI, ZW and TK required to control them.
  • a service interface which is not shown in the illustration in FIG. 1, is provided for transferring the data of the fuel pump and / or the injector or the injection valve into the control unit of the motor vehicle.
  • the input value or the data of the injector can, for example, be printed in plain text on the injector itself.
  • FIG. 2 shows an exemplary embodiment of a method according to the invention for reading out data from a fuel metering system.
  • the operation of the internal combustion engine (BKM) is first prevented in a step 21. This can be done, for example, by a corresponding memory entry in the engine control unit, which is queried before the BKM is started up. It is particularly advantageous to determine the memory entry already during the manufacture of the engine control unit because this measure effectively prevents the BKM from operating before the memory entry has been changed. This prevention of the operation of the BKM makes sense because the reading of the data into the control device is usually triggered externally by a control signal at the initial start.
  • This external triggering of the reading in of the data can be carried out by an operator, for example, by means of a motor test unit at the end of the line during the production of a motor vehicle.
  • the first commissioning of the Internal combustion engine are delayed by the control unit until the reading of the data and the other initialization of the control unit is complete.
  • the data of the injectors or the fuel pump (s) are read out.
  • This data can contain information about flow values, tightness values, electrical and / or mechanical properties or general classification codes.
  • the data are read out when the motor vehicle into which the fuel metering system is first put into operation. This is the so-called initial start of the motor vehicle with the associated fuel metering system. After the data have been read out, they are stored in step 23 in the memory of the control unit.
  • the data read out are used, for example, to correct maps of the cylinder equalization function stored in the control device.
  • the data read out can also be used to pre-control the cylinder equalization function.
  • the cylinder equalization function only has to carry out a few control interventions, since by taking into account the data according to the invention in the cylinder equalization function, different manufacturing tolerances of the injectors or fuel pumps are harmonized. These minor control interventions in turn offer the great advantage of a more reliable diagnosis or better feasibility of error routines.
  • Cylinder equalization function can be performed better and more reliably.
  • Step 24 is followed by step 25, in which the operation of the fuel supply system and thus of the internal combustion engine (BKM) is enabled. This can be done by changing the corresponding information in the memory of the engine control unit, which is set in the factory to a setting “data not previously read in” when the control unit is manufactured.
  • step 25 After the start of the BKM has been released in step 25, the method according to the invention is ended.

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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)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un procédé servant à la lecture de données d'un système de dosage de carburant pour un moteur à combustion interne d'un véhicule automobile, notamment d'une pompe d'alimentation en carburant ou d'un injecteur. Selon l'invention, des données de la pompe d'alimentation en carburant ou de l'injecteur sont affectées à au moins un composant électronique et les données sont prises en compte par une unité de commande du véhicule automobile pour la commande du moteur à combustion interne du véhicule automobile.
PCT/DE2002/002920 2001-10-30 2002-08-08 Procede et dispositif pour la lecture de donnees d'un systeme de dosage de carburant WO2003040536A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10153522.8 2001-10-30
DE2001153522 DE10153522A1 (de) 2001-10-30 2001-10-30 Verfahren und Vorrichtung zum Auslesen von Daten eines Kraftstoffzumesssystems

Publications (1)

Publication Number Publication Date
WO2003040536A1 true WO2003040536A1 (fr) 2003-05-15

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ID=7704204

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/002920 WO2003040536A1 (fr) 2001-10-30 2002-08-08 Procede et dispositif pour la lecture de donnees d'un systeme de dosage de carburant

Country Status (2)

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DE (1) DE10153522A1 (fr)
WO (1) WO2003040536A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118325A (en) 1982-04-03 1983-10-26 Lucas Ind Plc Fuel supply system for an internal combustion engine
DE3510157A1 (de) 1985-03-21 1986-09-25 Vdo Adolf Schindling Ag, 6000 Frankfurt Einrichtung zur zeitgesteuerten ansteuerung elektromagnetisch betaetigbarer kraftstoffeinspritzventile
US4972293A (en) * 1989-07-31 1990-11-20 Allied-Signal Inc. Coded electromagnetic device and system therefor
DE3336028C2 (fr) 1983-10-04 1992-06-04 Robert Bosch Gmbh, 7000 Stuttgart, De
US5575264A (en) 1995-12-22 1996-11-19 Siemens Automotive Corporation Using EEPROM technology in carrying performance data with a fuel injector
DE19851797A1 (de) 1997-11-12 1999-05-20 Bosch Gmbh Robert Elektrische Schaltung zum Speichern/Auslesen technischer Daten eines Kraftstoffzumeßsystems
DE19828279A1 (de) 1998-06-25 1999-12-30 Bosch Gmbh Robert Gleichstellung der zylinderindividuellen Drehmomentenbeiträge beim mehrzylindrigen Verbrennungsmotor
DE10007691A1 (de) 2000-02-19 2001-09-06 Bosch Gmbh Robert Verfahren und Vorrichtung zum Speichern und/oder Auslesen von Daten eines Kraftstoffzumesssystems

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118325A (en) 1982-04-03 1983-10-26 Lucas Ind Plc Fuel supply system for an internal combustion engine
DE3336028C2 (fr) 1983-10-04 1992-06-04 Robert Bosch Gmbh, 7000 Stuttgart, De
DE3510157A1 (de) 1985-03-21 1986-09-25 Vdo Adolf Schindling Ag, 6000 Frankfurt Einrichtung zur zeitgesteuerten ansteuerung elektromagnetisch betaetigbarer kraftstoffeinspritzventile
US4972293A (en) * 1989-07-31 1990-11-20 Allied-Signal Inc. Coded electromagnetic device and system therefor
US5575264A (en) 1995-12-22 1996-11-19 Siemens Automotive Corporation Using EEPROM technology in carrying performance data with a fuel injector
DE19851797A1 (de) 1997-11-12 1999-05-20 Bosch Gmbh Robert Elektrische Schaltung zum Speichern/Auslesen technischer Daten eines Kraftstoffzumeßsystems
DE19828279A1 (de) 1998-06-25 1999-12-30 Bosch Gmbh Robert Gleichstellung der zylinderindividuellen Drehmomentenbeiträge beim mehrzylindrigen Verbrennungsmotor
DE10007691A1 (de) 2000-02-19 2001-09-06 Bosch Gmbh Robert Verfahren und Vorrichtung zum Speichern und/oder Auslesen von Daten eines Kraftstoffzumesssystems

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