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WO1992000447A1 - Procede et dispositif pour commander l'excitation d'un consommateur electromagnetique - Google Patents

Procede et dispositif pour commander l'excitation d'un consommateur electromagnetique Download PDF

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Publication number
WO1992000447A1
WO1992000447A1 PCT/DE1991/000448 DE9100448W WO9200447A1 WO 1992000447 A1 WO1992000447 A1 WO 1992000447A1 DE 9100448 W DE9100448 W DE 9100448W WO 9200447 A1 WO9200447 A1 WO 9200447A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
switching means
control means
electromagnetic consumer
comparison
Prior art date
Application number
PCT/DE1991/000448
Other languages
German (de)
English (en)
Inventor
Herbert Graf
Jürgen Schwenger
Werner Zimmermann
Bernd Wichert
Thomas Bielesch
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 WO1992000447A1 publication Critical patent/WO1992000447A1/fr

Links

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
    • F02D2041/2031—Control of the current by means of delays or monostable multivibrators
    • 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

Definitions

  • DE-A-29 05 900 is a device for control the de-excitation time of electromagnetic devices, in particular of electromagnetic injection valves in internal combustion engines, / in which the electromagnetic device has a circuit arrangement with, in particular, controllable output voltage connected in series or in parallel.
  • the inductive consumer is supplied, for example, from a voltage source via a series-connected transistor which can be controlled by control means.
  • a desired rapid current reduction when the transistor is switched off can be achieved by a Zener diode connected in parallel with the transistor or a correspondingly operated transistor with a Zener voltage which is higher than the supply voltage at the moment of switching off.
  • a such a transistor is also directly provided with a so-called Zener bracketing and can thus be operated as an erasing device.
  • the transistor can also be operated in a clocked manner. If a rapid current reduction in this operating state is not desired, a switched freewheeling circuit can also be provided. Due to a short circuit or a faulty continuous activation within such a freewheeling circuit or within the above-mentioned extinguishing device, the case can occur in known devices of this type that the current is not reduced with the required speed when the inductive consumer is switched off. As a result, the duty cycle of the consumer is extended in an undesirable manner, as a result of which an undesirably high amount of fuel is injected, for example in the case of a fuel injector. This leads to an undesirably high consumption of fuel and ultimately to an undesired additional pollution of the environment with pollutants or to an undesirably high
  • the solution according to the invention with the features shown in the second part of claim 1 has the advantage that the above-mentioned errors can be recognized and that the switching means provided for controlling the switching means can be corrected in such a way that the switching means only in this way is pressed for a long time, as is absolutely necessary for the control of the electromagnetic consumer.
  • the switching means provided for controlling the switching means can be corrected in such a way that the switching means only in this way is pressed for a long time, as is absolutely necessary for the control of the electromagnetic consumer.
  • this also results in a further favorable consequence in a reduction in exhaust gases which are harmful to the environment.
  • the voltage applied to the switching means is conducted via a filter element, in particular an RC element;
  • a filter element in particular an RC element;
  • this necessary period of time can also be checked in that a monostable multivibrator is connected between the output connection of a voltage comparison means and the control means.
  • the signal influencing the control means for the switching means for the purpose of shortening or extending the on or off duration of the switching means is stored at least temporarily, since this signal is only present in the electromagnetic consumer directly during the current reduction.
  • this storage is effected by a storage element connected between the output connection of a voltage comparison means and an input connection of the control means.
  • FIG. 1 shows a circuit diagram of a first exemplary embodiment of the invention, in which an alternatively usable memory element is also shown
  • FIG. 2 shows a further exemplary embodiment of the invention with a monostable multivibrator connected between the output connection of the voltage comparison means and the control means
  • FIGS. 3 and 4 Pulse diagrams at various points in the circuit diagrams according to FIGS. 1 and 2. Description of the embodiments
  • a device for controlling an electromagnetic consumer comprises an electromagnetic consumer 1, in particular an electromagnetic injection valve for an internal combustion engine, and a switching means 2, in particular a transistor, connected in series therewith.
  • the connection of the electromagnetic consumer 1 facing away from the switching means 2 is connected to the operating voltage U.
  • a voltage limiting device 4 for example a Zener diode, is connected in parallel with the switching means 2.
  • a free-wheeling circuit 5 is connected in parallel to the electromagnetic consumer 1, which includes, for example, a transistor 12, the switching path of which is connected in series with a diode 13 .
  • the device further comprises control means 3 for controlling the switching means 2.
  • the control means 3 preferably comprise a microcomputer. Furthermore, the device comprises voltage comparison means 6 with at least two input connections and one output connection.
  • an operational amplifier connected as a comparator is used as the voltage comparison means 6, the non-inverting input of which is optionally connected to the connection point between the electromagnetic consumer 1 and the switching means 2 via a dashed-line RC element R1, C1.
  • a pole of a reference voltage source 11 is placed, the other terminal of which is connected to the ground terminal.
  • the output connection 8 of the voltage comparison means 6 is led to an input connection of the control means 3.
  • a memory element in particular a bistable memory element 9, is connected between the output terminal 8 of the voltage comparison means 6 and the input terminal of the control means 3.
  • the circuit diagram shown only partially in Figure 2 shows a further embodiment of the invention, which differs from the embodiment shown in Figure 1 essentially only in that a monostable multivibrator 10 is switched on between the output terminal 8 of the voltage comparison means 6 and the input terminal of the control means 3 .
  • an RC element consisting of the resistor R1 and the capacitor C1 is connected before the non-inverting input connection of the voltage comparison means 6 in accordance with the circuit diagram according to FIG.
  • the invention is now based on the knowledge that, despite the occurrence of the error phenomena described above, an exact metering of the necessary amount of fuel can be achieved by monitoring the voltage applied to the switching means 2 and that upon detection of an error as a result of this monitoring by influencing the control means 3 the duty cycle of the switching means 2 is reduced by means of a correction signal in such a way that only the absolutely necessary amount of fuel is metered.
  • the voltage applied to the switching means 2 becomes the non-inverting input connection of the comparison means 6 supplied, at the inverting input terminal of the voltage UREF a reference voltage source 11 is applied.
  • a reference voltage for example by means of a voltage divider (not shown), can also be derived directly from the operating voltage U in a cheaper version of the circuit arrangement, instead of a special reference voltage source 11.
  • the voltage applied to the switching means 2 and the voltage UREF of the reference voltage source 11 are compared with one another in the voltage comparison means 6. If the voltage present at the non-inverting input connection of the voltage comparison means 6 exceeds a setpoint value which can be predetermined by the reference voltage source 11 when the electromagnetic consumer 1 is switched off by the switching means 2, the voltage comparison means 6 supplies an output signal at its output connection 8 which indicates that the extinguishing devices are working properly work or that there is an error.
  • This output signal is fed to an input connection of the control means 3, which comprise a microcomputer.
  • this output signal can be evaluated in such a way that when an error state is detected, the control signal for the switching means 2 is influenced, for example in the sense of a shortening of the switching means 2. Since this ⁇ output signal at the output connection 8 of the voltage comparison means 6 is essentially only present during the period of current reduction in the electromagnetic consumer 1, this ⁇ output signal can be stored at least temporarily in a particularly advantageous embodiment of the invention for better evaluation in the microcomputer of the control means 3 to enable. This temporary storage of the output signal in a memory element 9 takes place in a particularly advantageous manner between the output terminal 3 of the voltage comparison means 6 and the input terminal of the control means 3 is switched on.
  • a bistable memory element 9 is particularly advantageously provided, which can be reset for the switching means 2 in each case by the switch-on signal present at the output connection of the control means 3.
  • Figure 3a shows some characteristic signals of the circuit of Figure 1 when properly functioning.
  • the switching means 2 is switched on and the voltage 3 drops from the value of the supply voltage U to a very small value.
  • the voltage B then rises to a value which is limited by the quenching device 4 and is above the supply voltage U until the current in the consumer 1 has decayed.
  • the voltage 3 drops again to the value of the supply voltage U.
  • the voltage comparison device 6 compares the voltage A or C, which may be filtered via the RC element R1-C1, with the reference value UREF of the reference voltage source 11 (signal D) and supplies it during the application Quenching voltage the pulse in the signal E.
  • the voltage at point 3 does not rise above the value of the supply voltage U and the voltage comparison means 6 does not deliver a pulse at its output (point E) .
  • the pulse present at the output of the voltage comparison means 6 only during the deletion process (with proper functioning) can be buffered by the memory element 9, for example, until the switching means 2 is switched on again (signal F).
  • the complete reduction of the current in the electromagnetic consumer 1 requires a period of time, for example dependent on the supply voltage U, the quenching voltage and possibly other parameters, during which the quenching voltage must be present.
  • the presence of the quenching voltage during this minimum time is expediently ensured in one exemplary embodiment of the invention in that the voltage comparison means 6 is supplied with the voltage present at the switching means 2 via a frequency-dependent element, in particular an RC element.
  • this RC element comprises the resistor R1 and the capacitor C1, the connection point of which is connected to the non-inverting connection of the voltage comparison means 6.
  • the duration of the output signal at the output connection 8 of the voltage comparison means ⁇ can also be detected by connecting a monostable multivibrator 10 between the voltage comparison means 6 and the control means 3.
  • the predeterminable time constant of this monostable multivibrator 10 means that an output signal present at the output connection 8 of the voltage comparison means 6 is only present at the input connection of the control means 3 for a sufficiently long duration.
  • FIG. 4A shows the signals at points E, F, G, H if the duration is sufficiently long, FIG. 4B if the duration is too short.

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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)
  • Fuel-Injection Apparatus (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

Dans un procédé et un dispositif pour commander l'excitation d'un consommateur électromagnétique (1) monté en série avec un moyen de commutation (2), la tension appliquée au moyen de commutation (2) est amenée à un comparateur de tension (6) et y est comparée avec la tension d'une source de tension de référence (11). En fonction de cette comparaison de tension est généré à la connexion de sortie (8) du comparateur de tension (6) un signal de sortie influant sur les moyens de commande (3) du moyen de commutation (2) dans le sens d'une modification de la durée de commande du moyen de commutation (2).
PCT/DE1991/000448 1990-06-23 1991-05-27 Procede et dispositif pour commander l'excitation d'un consommateur electromagnetique WO1992000447A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904020094 DE4020094C2 (de) 1990-06-23 1990-06-23 Verfahren und Einrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers
DEP4020094.9 1990-06-23

Publications (1)

Publication Number Publication Date
WO1992000447A1 true WO1992000447A1 (fr) 1992-01-09

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PCT/DE1991/000448 WO1992000447A1 (fr) 1990-06-23 1991-05-27 Procede et dispositif pour commander l'excitation d'un consommateur electromagnetique

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DE (1) DE4020094C2 (fr)
WO (1) WO1992000447A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693508A1 (fr) * 1992-07-10 1994-01-14 Bosch Gmbh Robert Procédé et dispositif de commande d'un appareil électro-magnétique, en particulier une électrovanne pour l'injection d'un moteur à combustion interne.
EP0631292A3 (fr) * 1993-06-25 1995-04-12 Bosch Gmbh Robert Dispositif d'excitation d'un consommateur électromagnétique.
WO1996032580A1 (fr) * 1995-04-12 1996-10-17 Robert Bosch Gmbh Procede et dispositif de commande d'un consommateur electromagnetique
KR100857638B1 (ko) 2001-08-16 2008-09-08 로베르트 보쉬 게엠베하 전자기 소비기를 제어하기 위한 방법 및 장치
RU2333564C2 (ru) * 2006-10-16 2008-09-10 Открытое акционерное общество "Всероссийский научно-исследовательский проектно-конструкторский и технологический институт релестроения с опытным производством" Электромагнит постоянного тока с форсировкой

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4227165C2 (de) * 1992-08-17 1994-11-10 Siemens Ag Schaltungsanordnungen zum Steuern von induktiven Verbrauchern
DE4242432A1 (de) * 1992-12-16 1994-06-23 Ebern Fahrzeugtech Gmbh Verfahren zum Ansteuern eines Elektromagnetventils, eines Hubmagneten, eines Drehmagneten oder eines Relais
DE4415361B4 (de) * 1994-05-02 2005-05-04 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung eines elektromagnetischen Verbrauchers
DE4430867A1 (de) * 1994-08-31 1996-03-07 Licentia Gmbh Schaltungsanordnung zur Regelung des elektromagnetischen Antriebes eines Schaltgerätes
DE19529433A1 (de) * 1995-08-10 1997-02-13 Teves Gmbh Alfred Verfahren und Schaltungsanordnung zur Überwachung einer Steuerschaltung
DE19913477B4 (de) * 1999-03-25 2004-08-26 Robert Bosch Gmbh Verfahren zum Betreiben einer Kraftstoffzuführeinrichtung einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2345595A1 (fr) * 1976-03-26 1977-10-21 Bosch Gmbh Robert Installation pour la commande, avec un courant regle, d'organes de manoeuvre electromagnetiques
FR2547628A1 (fr) * 1983-06-18 1984-12-21 Bosch Gmbh Robert Dispositif pour la commande d'un organe de reglage a industion notamment d'un carburateur
EP0358972A1 (fr) * 1988-09-14 1990-03-21 MARELLI AUTRONICA S.p.A. Circuit électrique de puissance pour systèmes d'injection de véhicule automobile, avec fonction de détection et d'analyse de pannes et méthode de fonctionnement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2905900A1 (de) * 1979-02-16 1980-08-28 Bosch Gmbh Robert Vorrichtung zur steuerung der entregungszeit von elektromagnetischen einrichtungen, insbesondere von elektromagnetischen einspritzventilen bei brennkraftmaschinen
US4399483A (en) * 1982-02-08 1983-08-16 Chandler Evans, Inc. Solenoid current control
US4536818A (en) * 1984-03-02 1985-08-20 Ford Motor Company Solenoid driver with switching during current decay from initial peak current

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2345595A1 (fr) * 1976-03-26 1977-10-21 Bosch Gmbh Robert Installation pour la commande, avec un courant regle, d'organes de manoeuvre electromagnetiques
FR2547628A1 (fr) * 1983-06-18 1984-12-21 Bosch Gmbh Robert Dispositif pour la commande d'un organe de reglage a industion notamment d'un carburateur
EP0358972A1 (fr) * 1988-09-14 1990-03-21 MARELLI AUTRONICA S.p.A. Circuit électrique de puissance pour systèmes d'injection de véhicule automobile, avec fonction de détection et d'analyse de pannes et méthode de fonctionnement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693508A1 (fr) * 1992-07-10 1994-01-14 Bosch Gmbh Robert Procédé et dispositif de commande d'un appareil électro-magnétique, en particulier une électrovanne pour l'injection d'un moteur à combustion interne.
EP0631292A3 (fr) * 1993-06-25 1995-04-12 Bosch Gmbh Robert Dispositif d'excitation d'un consommateur électromagnétique.
WO1996032580A1 (fr) * 1995-04-12 1996-10-17 Robert Bosch Gmbh Procede et dispositif de commande d'un consommateur electromagnetique
CN1071406C (zh) * 1995-04-12 2001-09-19 罗伯特·博施有限公司 控制一种电磁用电器的方法及装置
KR100857638B1 (ko) 2001-08-16 2008-09-08 로베르트 보쉬 게엠베하 전자기 소비기를 제어하기 위한 방법 및 장치
RU2333564C2 (ru) * 2006-10-16 2008-09-10 Открытое акционерное общество "Всероссийский научно-исследовательский проектно-конструкторский и технологический институт релестроения с опытным производством" Электромагнит постоянного тока с форсировкой

Also Published As

Publication number Publication date
DE4020094A1 (de) 1992-01-02
DE4020094C2 (de) 1998-01-29

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