EP0246357B1 - Procédé de contrôle d'un injecteur électromagnétique - Google Patents

Procédé de contrôle d'un injecteur électromagnétique Download PDF

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Publication number
EP0246357B1
EP0246357B1 EP86116751A EP86116751A EP0246357B1 EP 0246357 B1 EP0246357 B1 EP 0246357B1 EP 86116751 A EP86116751 A EP 86116751A EP 86116751 A EP86116751 A EP 86116751A EP 0246357 B1 EP0246357 B1 EP 0246357B1
Authority
EP
European Patent Office
Prior art keywords
current
operating voltage
injection valve
peak value
analog
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
Application number
EP86116751A
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German (de)
English (en)
Other versions
EP0246357A1 (fr
Inventor
Andreas Sausner
Heinz Höhne
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
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Publication date
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Application filed by Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of EP0246357A1 publication Critical patent/EP0246357A1/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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • 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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2024—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control switching a load after time-on and time-off pulses
    • F02D2041/2027—Control of the current by pulse width modulation or duty cycle control
    • 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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
    • 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
    • F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
    • F02D2200/503—Battery correction, i.e. corrections as a function of the state of the battery, its output or its type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/32—Energising current supplied by semiconductor device
    • H01H47/325—Energising current supplied by semiconductor device by switching regulator

Definitions

  • the invention is based on a method for controlling an injection valve for an internal combustion engine according to the preamble of claim 1 (see, for example, GB-A-2 032 720, Fig. 2b, c or US-A-4173 030, Fig. 3) .
  • the solenoid of the injection valve is applied to an operating voltage in a pulsating manner with the aid of a semiconductor switch in such a way that a current sufficient to open the injection valve flows during a first time period and that a second time period dependent on the intended injection duration flows with a current sufficient to keep the valve open connects.
  • Injectors for internal combustion engines with a low internal resistance are controlled by a so-called current control.
  • To open the valve wait until the current through the solenoid of the valve has reached a predetermined value.
  • the current is then switched off and a pulsating voltage is applied as a function of the intended injection duration.
  • the rate of rise of the current during the first section depends on the level of the operating voltage, in particular on the state of charge and the further load on the vehicle battery. With a low operating voltage, it can take a long time to reach the specified peak value. This dependency is disruptive in electronically controlled fuel injection systems. For example, at low operating voltages, the first time period can be so long that the injection of small amounts of fuel cannot be controlled precisely.
  • the method according to the invention is characterized in that the peak value is a predetermined function of the operating voltage.
  • the specified function can depend in particular on the type of the injection valve. Basically, however, the function will be such that the peak current is higher for a higher operating voltage than for a lower operating voltage.
  • An advantageous circuit arrangement for carrying out the method according to the invention is that the solenoid coil of the injection valve is connected to an output stage and a current measuring resistor, that the current measuring resistor is connected to the input of a first analog / digital converter and the operating voltage source is connected to the output stage and the input of a second analog / Digital converter are connected, that the outputs of the analog / digital converter are connected to inputs of a processor, the output of which is connected to a control input of the output stage, and that the processor is also assigned a memory for the predetermined function.
  • FIG. 1 a shows the course of the voltage on a magnet coil during an injection process
  • FIG. 1 b shows the course of the current through the magnet coil during the same time.
  • a voltage Ub is applied to the magnetic coil, which results in an increase in the current I through the coil.
  • a predetermined peak value Is is reached at time t1, whereupon the voltage is switched off.
  • the coil is short-circuited at the same time via a further transistor, so that the current falls between t1 and t2.
  • a pulsating voltage causes a current that is sufficient to keep the injector open.
  • the current then drops to 0 again, so that the valve is closed.
  • the injection quantity is regulated by changing the time period between t1 and t3 accordingly. With a minimum injection quantity, the current I drops to 0 after switching off at t1.
  • FIG. 1c shows, with a changed time scale, the current increase after switching on at t0 for different operating voltages, namely for an average operating voltage Um, for a minimum operating voltage Umin and for a maximum operating voltage Umax. Points 1, 2, 3 at which the injection valve opens are marked on the individual curves. With the slow current rise caused by the lower operating voltage, the valve opens at a lower current.
  • the voltage is now switched off at different current values, which depend on the operating voltage.
  • the resulting points 4, 5, 6 on the curves still have a sufficient safety distance from points 1, 2, 3, which were determined for opening the valve.
  • the switch-off time is brought forward from t1 'to t1 ".
  • the solenoid coil 11 of an injection valve is connected in series with a current measuring resistor 22 in the output circuit of an output stage 12.
  • the operating voltage Ub is supplied at 13. while the end of the current measuring resistor 22 facing away from the magnet coil 11 is connected to ground potential.
  • Power amplifiers for injection valves are known per se and need not be explained in connection with the present invention.
  • the output 21 of the output stage 12 can be connected either to the operating voltage Ub supplied at 13 or to ground potential.
  • the operating voltage can be applied to the solenoid coil with a pulse supplied at 14, while a pulse supplied with 15 causes the solenoid coil 11 to be separated from the operating voltage Ub and a connection to ground.
  • both the operating voltage Ub is fed to a processor 18 via a first analog / digital converter 16 and the voltage drop across the current measuring resistor 22 is fed via a second analog / digital converter 17.
  • a non-volatile memory 19 is assigned to the processor 18, in which the function is stored according to which the peak current Is is to be controlled as a function of the operating voltage Ub.
  • the processor now reads a corresponding value Is from the memory 19 for the value of the operating voltage Ub supplied by the analog / digital converter 16 and compares it with the current value emitted by the analog / digital converter 17. If the value Is is reached, the processor 18 sends a pulse to the input 15 of the output stage, whereupon the latter separates the magnet coil 11 from the operating voltage Ub and switches it to ground, whereupon the current drops, as explained in connection with FIG. 1.

Landscapes

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

Claims (3)

1. Procédé de commande d'un injecteur électromagnétique pour moteur à combustion interne, dans lequel la bobine de l'électro-aimant de cet injecteur est alimentée par impulsions, à l'aide d'un commutateur à semi-conducteur, par une tension de service de façon qu'il passe pendant un premier intervalle de temps un courant d'intensité suffisante pour ouvrir l'injecteur, puis qu'y succède le cas échéant un second intervalle de temps dépendant de la durée d'injection prévue au cours duquel passe un courant d'intensité suffisante pour maintenir l'injecteur ouvert, le premier intervalle de temps étant terminé par coupure du courant lorsque l'intensité a atteint une vapeur de pointe, procédé caractérisé en ce que cette valeur de pointe est une fonction prédéterminée de la tension de service.
2. Procédé selon la revendication 1, caractérisé en ce que la valeur de pointe est plus élevée lorsque la tension de service est élevée que lorsque cette tension est plus faible.
3. Circuit pour la mise en oeuvre du procédé selon la revendication 1, caractérisé en ce que la bobine (11) de l'électro-aimant de l'injecteur est reliée à un étage final (12) et à une résistance (22) de mesure de l'intensité ; en ce que cette résistance (22) est connectée à l'entrée d'un premier convertisseur (17) analogique/numérique et la source de tension de service est reliée à l'étage final (12) et à l'entrée d'un second convertisseur (16) analogique/numérique ; en ce que les sorties de ces convertisseurs (16, 17) sont connectées à des entrées d'un processeur (18) dont la sortie est connectée à une entrée (15) de commande de l'étage final (12) et en ce qu'en outre il est associé à ce processeur (18) une mémoire (19) contenant la fonction prédéterminée de la valeur de pointe de l'intensité, destinée à ouvrir l'injecteur.
EP86116751A 1986-05-15 1986-12-02 Procédé de contrôle d'un injecteur électromagnétique Expired EP0246357B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863616356 DE3616356A1 (de) 1986-05-15 1986-05-15 Verfahren und schaltungsanordnung zur ansteuerung eines einspritzventils
DE3616356 1986-05-15

Publications (2)

Publication Number Publication Date
EP0246357A1 EP0246357A1 (fr) 1987-11-25
EP0246357B1 true EP0246357B1 (fr) 1988-09-28

Family

ID=6300879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116751A Expired EP0246357B1 (fr) 1986-05-15 1986-12-02 Procédé de contrôle d'un injecteur électromagnétique

Country Status (5)

Country Link
US (1) US4770178A (fr)
EP (1) EP0246357B1 (fr)
JP (1) JPS6336044A (fr)
BR (1) BR8701749A (fr)
DE (2) DE3616356A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2623242B2 (ja) * 1987-01-16 1997-06-25 本田技研工業株式会社 電磁作動器駆動回路の電流検出装置
JPH03164912A (ja) * 1989-11-24 1991-07-16 Mitsubishi Electric Corp デューティソレノイドバルブの駆動装置
GB2260030A (en) * 1991-09-14 1993-03-31 Kloeckner Humboldt Deutz Ag Control systems for electromagnetic valves
JPH05248300A (ja) * 1992-03-04 1993-09-24 Zexel Corp 燃料噴射装置
US5430601A (en) * 1993-04-30 1995-07-04 Chrysler Corporation Electronic fuel injector driver circuit
SE505747C2 (sv) * 1996-02-07 1997-10-06 Asea Brown Boveri Kontaktorutrustning
DE19615519A1 (de) * 1996-04-19 1997-10-30 Voith Turbo Kg Digitaler Zweipunktregler für ein Aktuatorelement
US5796223A (en) * 1996-07-02 1998-08-18 Zexel Corporation Method and apparatus for high-speed driving of electromagnetic load
FR2751700B1 (fr) * 1996-07-23 1998-10-30 Peugeot Motocycles Sa Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule
JP3828239B2 (ja) * 1997-05-22 2006-10-04 三菱電機株式会社 燃料噴射用インジェクタの制御装置
DE19913477B4 (de) * 1999-03-25 2004-08-26 Robert Bosch Gmbh Verfahren zum Betreiben einer Kraftstoffzuführeinrichtung einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs
DE19935045A1 (de) * 1999-07-26 2001-02-01 Moeller Gmbh Elektronische Antriebssteuerung
DE502004000566D1 (de) * 2003-06-18 2006-06-22 Vw Mechatronic Gmbh & Co Kg Verfahren und Anordnung zum Betreiben eines kapazitiven Stellgliedes

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1055675B (it) * 1975-11-12 1982-01-11 Fiat Spa Procedimento e dispositivo di stabilizzazione della portata degli iniettori elettromagnetici mediante rilevamento del tempo di apertura definito tra due soglie di correnti prefissat
JPS6056948B2 (ja) * 1977-02-08 1985-12-12 株式会社日本自動車部品総合研究所 電磁弁駆動装置
US4327394A (en) * 1978-02-27 1982-04-27 The Bendix Corporation Inductive load drive circuit utilizing a bi-level output comparator and a flip-flop to set three different levels of load current
US4173030A (en) * 1978-05-17 1979-10-30 General Motors Corporation Fuel injector driver circuit
DE2828678A1 (de) * 1978-06-30 1980-04-17 Bosch Gmbh Robert Verfahren und einrichtung zum betrieb eines elektromagnetischen verbrauchers, insbesondere eines einspritzventils in brennkraftmaschinen
DE2841781A1 (de) * 1978-09-26 1980-04-10 Bosch Gmbh Robert Einrichtung zum betrieb von elektromagnetischen verbrauchern bei brennkraftmaschinen
JPS5677550A (en) * 1979-11-28 1981-06-25 Nippon Denso Co Ltd Fuel injector actuating circuit
JPS5851233A (ja) * 1981-09-21 1983-03-25 Hitachi Ltd 燃料噴射弁駆動回路
US4511945A (en) * 1983-12-27 1985-04-16 Ford Motor Company Solenoid switching driver with fast current decay from initial peak current
GB8402470D0 (en) * 1984-01-31 1984-03-07 Lucas Ind Plc Drive circuits
DE3445414A1 (de) * 1984-12-13 1986-06-19 Robert Bosch Gmbh, 7000 Stuttgart Elektronisch gesteuertes kraftstoffeinspritzsystem fuer eine brennkraftmaschine

Also Published As

Publication number Publication date
DE3660827D1 (en) 1988-11-03
JPS6336044A (ja) 1988-02-16
EP0246357A1 (fr) 1987-11-25
US4770178A (en) 1988-09-13
DE3616356A1 (de) 1987-11-19
BR8701749A (pt) 1988-01-26

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