EP0309755A1 - Procédé et dispositif de commande du courant dans une charge inductive, en particulier dans un injecteur de carburant - Google Patents

Procédé et dispositif de commande du courant dans une charge inductive, en particulier dans un injecteur de carburant Download PDF

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Publication number
EP0309755A1
EP0309755A1 EP88114223A EP88114223A EP0309755A1 EP 0309755 A1 EP0309755 A1 EP 0309755A1 EP 88114223 A EP88114223 A EP 88114223A EP 88114223 A EP88114223 A EP 88114223A EP 0309755 A1 EP0309755 A1 EP 0309755A1
Authority
EP
European Patent Office
Prior art keywords
signal
switch
clock
load
generator
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.)
Withdrawn
Application number
EP88114223A
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German (de)
English (en)
Inventor
Manfred Dipl.-Ing. Glehr
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0309755A1 publication Critical patent/EP0309755A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage 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
    • F02D2041/2062—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value the current value is determined by simulation or estimation
    • 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
    • F02D2041/2068—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements
    • F02D2041/2075—Type of transistors or particular use thereof

Definitions

  • the invention relates to a method for controlling the load current according to the preamble of claim 1 and an associated arrangement.
  • the invention has for its object to avoid the disadvantages associated with such a resistor, such as power losses and lower peak current.
  • this is achieved by means of a model which has approximately the same time behavior and the same dependence on the level of the voltage of the voltage source feeding the load circuit as the load circuit and which is started at the start of the switch-on signal and which determines the end of the switch-on signal.
  • the invention is based on the fact that the parameters determining the time behavior of the load circuit - resistances, inductance - are essentially constant and thus the time behavior is only dependent on the operating voltage.
  • a charging circuit with an electrical store and a charging source is preferably used as a model and the charge size (voltage or current) in the store is compared with a limit value.
  • Either the source quantity (voltage or current) supplied by the charging source with a constant limit value or this limit value with a constant source quantity may depend on the operating voltage of the voltage source.
  • the source variable is preferably a voltage which is dependent on the operating voltage and with which a capacitor serving as a memory is charged. In principle, however, a current can also serve as the source variable, with which a coil is charged as a memory.
  • the time behavior of the load circuit can of course also be simulated with the help of a digital computer.
  • the invention also makes it possible to set the current differently during the duration of a closing signal: for example, at the beginning of the closing signal one can generate a start signal with a specific start duration and then intermittently clock signals with a cycle duration that is shorter than the start duration.
  • the amount of the maximum inrush current and a lower holding current can be determined by setting the start duration and the cycle duration.
  • several inductive loads e.g. Injectors that are to be actuated with a timed closing signal can, according to a further development of the invention, use a single model for determining the starting time and a further model for determining the cycle time.
  • the switch-on signals for each load which are composed of a start signal and a plurality of clock signals, are formed with the aid of logic logic elements.
  • the load current i should rise as quickly as possible to a predetermined setpoint iS1; after the valve has been energized, the current should oscillate through a switching operation around an average holding current iH and increase intermittently to a lower setpoint iS2.
  • the switch-on signal SE required for this for a switch in the load circuit of the injection valve is shown in line 2; it is composed of a start signal SES with the start duration TES and then intermittently subsequent clock signals SET with the clock duration TEn.
  • the clock signals are separated by clock pauses TP.
  • the holding current iH depends on the duty cycle, that is to say the ratio of the clock duration TEn to the clock period duration T.
  • FIG. 2 shows two identical load circuits, each with an inductive load 1, 1 'in the form of an injection valve and a switch 2, 2' and connected to a voltage source 4.
  • Each switch 2, 2 ' consists essentially of a MOSFET 21 which is controlled by means of the voltage drop across a resistor 23. This voltage drop occurs every time a transistor 22 is turned on by the switch-on signal SE1,2: Then, via this transistor 22, a current flows from a voltage source (not shown) with the stabilized voltage UBS via the resistor 23.
  • a series circuit 24 comprising a diode and a zener diode protects the MOSFET 21 against switch-off overvoltage.
  • Each load 1, 1 ' is a freewheeling branch 3, 3' connected in parallel, which consists essentially of a freewheeling diode 32 and a transistor 31.
  • the latter is controlled via a transistor 33 by the closing signal SS during the duration of this closing signal: Therefore, if the switch 2, 2 'is open in the clock breaks TP, the load current can continue to flow through the freewheeling branch.
  • the start signal SES for both load circuits is generated by the start signal generator 6, which is shown in more detail in FIG. 3. It contains a monostable flip-flop 60, which essentially consists of an integrated flip-flop 600 (e.g. type LM555 from National Semiconductor) and a charging circuit acting as a start model with an adjustable resistor 101, a decoupling diode 602 and a capacitor 603.
  • the - variable - operating voltage UB is connected to the charging circuit.
  • the capacitor 603 is connected to the threshold input THR and the discharge input DIS of the trigger circuit 600, the inputs NSN, RES on the one hand and GRO on the other hand are connected to a voltage source (not shown) with the stabilized voltage UBS.
  • the capacitor 603 is additionally charged via a resistor 604 and a decoupling diode 605 depending on the stabilized voltage UBS.
  • the flip-flop 60 can be triggered by a pulse at the trigger input TRI: This causes the start signal SES at the output OUT set and the capacitor 603 quickly discharged via the DIS input.
  • the start signal SES is omitted again as soon as the voltage across the capacitor 603 reaches a fixed limit G set in the flip-flop 600; this is the case earlier, the higher the operating voltage UB (see FIG. 5).
  • a bistable flip-flop 631, 632 is assigned to each load circuit, which can be controlled via a differentiating element 61, 62 (RC element) depending on the associated closing signal SS1,2 and can be reset with the descending end edge of the start signal SES.
  • the resistors of the differentiators 61, 62 are also connected to two inputs of a NOR gate 64, the output of which is connected to the trigger input TRI: Therefore, the flip-flop 631 and thus the start signal SES1 and the flip-flop 60 are set with the rising edge of the closing signal SS1 . After a time dependent on UB, the flip-flop 60 tilts back and thus also sets the flip-flop 631 back via the signal SES. In the same way, the closing signal SS2 triggers a start signal SES2 which is dependent on the operating voltage UB.
  • the start signal generator can also have the structure shown in FIG. 4 and labeled 6 '.
  • a flip-flop 60 is provided here for each load circuit, which has the same structure and the same function as the flip-flop 60 in FIG. 3.
  • Each flip-flop delivers the start signal SES directly at its output OUT and is switched by means of the closing signal SS via an inverter 641. 642 controlled.
  • the clock generator 7 in FIG. 2 essentially consists of an astable flip-flop 71, which supplies a generator signal SG with a specific clock frequency.
  • the generator signal SG is used to control the trigger input of a monostable multivibrator 72, the structure of which is again the same as that of multivibrator 60 in FIG. 3. It differs only by a different dimensioning of the charging circuit, so that multivibrator 72 is on at its output Delivers clock signal SET with a clock duration TEn that is shorter than the start duration TES, but which also depends on the operating voltage UB (falls with increasing voltage).
  • the dependency of the clock ratio (TEn divided by T) on the operating voltage UB is shown in FIG.
  • This simplest embodiment results in an increase in the holding current iH as the operating voltage UB decreases. This can be avoided by using a constant clock pause TP that is matched to the time constant of the load circuit, i.e. works with a variable frequency of the astable flip-flop 71: The frequency of this flip-flop must then fall as the operating voltage decreases.
  • SE1 initially consists of the start signal SES1, which the start signal generator 6, triggered by the closing signal SS1, supplies via the OR gate 51.
  • the clock generator 7 supplies clock signals SET1 via the AND gate 52 and the OR gate 51 until the closing signal SS1 on the AND gate 52 is omitted and the switch 2 and the freewheeling circuit 3 are thus opened again.
  • the right half of FIG. 7 shows the influence of a lower operating voltage UB on the switch-on signals SE, the duration of which is greater than that of the switch-on signals in the left half of FIG. 7 (at a higher UB).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)
EP88114223A 1987-09-30 1988-08-31 Procédé et dispositif de commande du courant dans une charge inductive, en particulier dans un injecteur de carburant Withdrawn EP0309755A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3733086 1987-09-30
DE3733086 1987-09-30

Publications (1)

Publication Number Publication Date
EP0309755A1 true EP0309755A1 (fr) 1989-04-05

Family

ID=6337323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114223A Withdrawn EP0309755A1 (fr) 1987-09-30 1988-08-31 Procédé et dispositif de commande du courant dans une charge inductive, en particulier dans un injecteur de carburant

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EP (1) EP0309755A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648584A1 (fr) * 1989-06-16 1990-12-21 Rexroth Sigma Procede et systeme de regulation du courant moyen traversant une charge, et dispositif de telecommande electrique du type manipulateur en faisant application
WO1992003646A1 (fr) * 1990-08-18 1992-03-05 Robert Bosch Gmbh Procede et dispositif d'excitation d'un consommateur electomagnetique
EP0562908A1 (fr) * 1992-03-24 1993-09-29 Valeo Electronique Circuit d'alimentation pour relais électromagnétique
EP0791943A1 (fr) * 1996-02-22 1997-08-27 Max Kammerer GmbH Dispositif et méthode pour le contrÔle de la commutation d'un étage final de la commande d'une charge électromagnétique, notamment dans des systèmes de contrÔle d'eau chaude des véhicules automobiles
WO1998055748A2 (fr) * 1997-06-06 1998-12-10 Siemens Aktiengesellschaft Dispositif pour la commande d'un appareil de reglage electromecanique
EP1134384A3 (fr) * 2000-03-15 2004-01-21 Hitachi, Ltd. Système d'injection de carburant pour moteur à combustion interne
US6923161B2 (en) * 2002-03-28 2005-08-02 Siemens Vdo Automotive Corporation Fuel injection timer and current regulator
DE102022211462A1 (de) 2022-10-28 2024-05-08 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Adaption eines Kondensatormodells für einen Ausgangskondensator eines Gleichspannungswandlers, Kraftstoffeinspritzsystem, Recheneinheit und Computerprogramm

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2269186A1 (en) * 1974-04-26 1975-11-21 Baum Elektrophysik Gmbh Excitation coil cct. for DC contactors or relays - has electronic switch for pulsed voltage supply to excitation coil in holding state
US4180026A (en) * 1976-03-26 1979-12-25 Robert Bosch Gmbh Apparatus for controlling the operating current of electromagnetic devices
FR2445893A1 (fr) * 1979-01-08 1980-08-01 Bosch Gmbh Robert Installation pour commander le courant d'un consommateur electromagnetique notamment d'une soupape d'injection a commande electromagnetique d'un moteur a combustion interne
EP0075303A2 (fr) * 1981-09-21 1983-03-30 Hitachi, Ltd. Circuit d'attaque pour valve d'injection de carburant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2269186A1 (en) * 1974-04-26 1975-11-21 Baum Elektrophysik Gmbh Excitation coil cct. for DC contactors or relays - has electronic switch for pulsed voltage supply to excitation coil in holding state
US4180026A (en) * 1976-03-26 1979-12-25 Robert Bosch Gmbh Apparatus for controlling the operating current of electromagnetic devices
FR2445893A1 (fr) * 1979-01-08 1980-08-01 Bosch Gmbh Robert Installation pour commander le courant d'un consommateur electromagnetique notamment d'une soupape d'injection a commande electromagnetique d'un moteur a combustion interne
EP0075303A2 (fr) * 1981-09-21 1983-03-30 Hitachi, Ltd. Circuit d'attaque pour valve d'injection de carburant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Band 21, Nr. 3, August 1978, Seiten 1107-1108, New York, US; T.L. WELLS: "Pulse-width modulation of magnets" *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648584A1 (fr) * 1989-06-16 1990-12-21 Rexroth Sigma Procede et systeme de regulation du courant moyen traversant une charge, et dispositif de telecommande electrique du type manipulateur en faisant application
WO1992003646A1 (fr) * 1990-08-18 1992-03-05 Robert Bosch Gmbh Procede et dispositif d'excitation d'un consommateur electomagnetique
EP0562908A1 (fr) * 1992-03-24 1993-09-29 Valeo Electronique Circuit d'alimentation pour relais électromagnétique
FR2689306A1 (fr) * 1992-03-24 1993-10-01 Valeo Electronique Circuit d'alimentation pour relais électromagnétique.
EP0791943A1 (fr) * 1996-02-22 1997-08-27 Max Kammerer GmbH Dispositif et méthode pour le contrÔle de la commutation d'un étage final de la commande d'une charge électromagnétique, notamment dans des systèmes de contrÔle d'eau chaude des véhicules automobiles
WO1998055748A2 (fr) * 1997-06-06 1998-12-10 Siemens Aktiengesellschaft Dispositif pour la commande d'un appareil de reglage electromecanique
WO1998055748A3 (fr) * 1997-06-06 1999-03-11 Siemens Ag Dispositif pour la commande d'un appareil de reglage electromecanique
US6297941B1 (en) 1997-06-06 2001-10-02 Siemens Aktiengesellschaft Device for controlling an electromechanical actuator
EP1134384A3 (fr) * 2000-03-15 2004-01-21 Hitachi, Ltd. Système d'injection de carburant pour moteur à combustion interne
US6923161B2 (en) * 2002-03-28 2005-08-02 Siemens Vdo Automotive Corporation Fuel injection timer and current regulator
US7299789B2 (en) 2002-03-28 2007-11-27 Siemens Vdo Automotive Corporation Fuel injection timer and current regulator
DE102022211462A1 (de) 2022-10-28 2024-05-08 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Adaption eines Kondensatormodells für einen Ausgangskondensator eines Gleichspannungswandlers, Kraftstoffeinspritzsystem, Recheneinheit und Computerprogramm

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