EP0631292A2 - Dispositif d'excitation d'un consommateur électromagnétique - Google Patents

Dispositif d'excitation d'un consommateur électromagnétique Download PDF

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Publication number
EP0631292A2
EP0631292A2 EP94107828A EP94107828A EP0631292A2 EP 0631292 A2 EP0631292 A2 EP 0631292A2 EP 94107828 A EP94107828 A EP 94107828A EP 94107828 A EP94107828 A EP 94107828A EP 0631292 A2 EP0631292 A2 EP 0631292A2
Authority
EP
European Patent Office
Prior art keywords
transistor
switching means
resistor
consumer
electromagnetic
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Withdrawn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
EP94107828A
Other languages
German (de)
English (en)
Other versions
EP0631292A3 (fr
Inventor
Jürgen Dipl.-Ing. Schwenger (FH)
Werner Dr.-Ing. Zimmermann
Bernd Dipl.-Ing. Wichert (Fh)
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.)
Robert Bosch GmbH
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 EP0631292A2 publication Critical patent/EP0631292A2/fr
Publication of EP0631292A3 publication Critical patent/EP0631292A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • 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
    • F02D2041/2041—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit for controlling the current in the free-wheeling phase
    • 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

Definitions

  • Such a device for controlling an electromagnetic consumer is known from DE-OS 40 20 094. There, a device for controlling an electromagnetic consumer is described, which has a series connection consisting of the electromagnetic consumer and a first switching means. A freewheeling circuit for the electromagnetic consumer comprises a second switching means. Furthermore, control means for actuating the switching means are provided.
  • the switching time or the switch-off speed and thus the opening and closing time of the solenoid valve depend on various parameters, as a result of which an undesirably fluctuating amount of fuel is injected, for example in the case of a fuel injection valve. This leads to an undesirable additional pollution of the environment with pollutants.
  • FIG. 1 shows a circuit diagram of the first embodiment of the invention
  • FIG. 2 shows signal curves over time from different points in the circuit diagrams of FIG. 1
  • FIGS. 3a and 3b show a second and third embodiment.
  • 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 connected in series therewith.
  • the switching means 2 is implemented as a field effect transistor; realizations with other switching means, such as transistors, are also possible.
  • the connection of the electromagnetic consumer 1 facing away from the switching means 2 is connected to the battery voltage U.
  • the source terminal of the transistor 2 facing away from the electromagnetic consumer 1 is connected to ground.
  • a freewheeling circuit is connected in parallel with the electromagnetic consumer 1.
  • This freewheeling circuit preferably consists of a second switching means 3, the switching path of which is connected in series with a diode 4.
  • the switching means 3 is also implemented as a transistor, in particular as a field effect transistor.
  • the anode of the diode 4 is connected to the consumer 1 and to the drain of the transistor 2.
  • the cathode of the diode 4 is connected to the second switching means 3.
  • the device further comprises control means 5 for controlling the switching means 2.
  • the control means 5 are preferably implemented as microcomputers.
  • An extinguishing circuit is designated by 13.
  • the quenching circuit connects the connection point between the cathode of the diode 4, the source of the transistor 3 and the consumer to ground.
  • the quenching circuit is implemented as a zener diode, the anode of which is connected to ground and the cathode of which is connected to the consumer.
  • a control means 5A acts on another switching means 12 with control signals.
  • the further switching means 12 connects a connection point 9 to a second connection of the resistor 8.
  • the connection point 9 is connected to a first connection of a resistor 10 and via a resistor 11 to a reference voltage U REF .
  • the emitter of the switching means 12, the second connection of the resistor 8 and the second connection of the resistor 10 are connected to one another.
  • the base connection of the switching means 7 is applied to the potential of point 9.
  • the control means 5A is preferably the same control means that also applies control signals to the switching means 2.
  • the further switching means 7, the resistors 8, 10, 11 and the switching means 12 form a current source 20 that can be switched off.
  • the switching means 7 and 12 are preferably implemented as bipolar transistors.
  • the electromagnetic consumer 1 By driving the first transistor 2, the electromagnetic consumer 1 is connected to the battery voltage U and ground. This causes a current to flow through the consumer.
  • the time profiles of the different voltages, currents and control signals are plotted in FIG. 2.
  • the output signal of the control means 5 with which the transistor 2 is applied is plotted in FIG. 2a.
  • the control means 5 emits a pulse-shaped control signal.
  • the pulse duration or the pulse width depends, for example, on a current or voltage control, not shown.
  • Activation begins at time T1.
  • transistor 2 and transistor 3 are driven such that they are both closed and thus allow current to flow. From this point in time, as shown in FIG. 2b, the current through consumer 1 increases. If the current reaches a predetermined threshold value S1 at time T2, transistor 2 opens.
  • the transistor 2 is driven so that it opens.
  • the transistor 3 is also driven so that it opens.
  • the opening of the transistor 3 has the effect that the freewheeling circuit is no longer active and only the quenching circuit 13 leads to rapid extinction. This causes the current to flow through the Consumer drops to zero very quickly. This enables a very short switch-off time to be achieved.
  • the current reduction is relatively slow. As a result, the cycle times are relatively long.
  • the device shown is preferably used to control solenoid valves that control the fuel metering in motor vehicles.
  • the stroke of the solenoid valve needle is plotted in FIG. 2c.
  • the solenoid valve needle moves from time T1 until it reaches its second end position at time T2. Between times T3 and T4 it moves back to its original position. Fuel is metered in between times T2 and T4.
  • the drive signal for transistor 3 is plotted in FIG. 2d.
  • the transistor 3 is driven by the current source 20.
  • the transistor 3 is turned on when a predetermined voltage of approximately 10 volts is present between the source connection and the gate connection.
  • the control takes place as follows. At time T1, as shown in FIG. 2e, the transistor 12 is controlled by the control means 5A so that it opens. This causes the voltage divider formed by resistors 10 and 11 to drop at point 9 such that transistor 7 closes. The switching state of transistor 7 is plotted in FIG. 2f.
  • transistor 7 When transistor 7 is closed, a constant current flows through resistor 6. This in turn causes a constant voltage drop across resistor 6. This constant voltage drives transistor 3 in such a way that it closes as shown in FIG. 2d and the free-wheeling circuit is active.
  • a constant current is applied to the resistor 6 via the current source 20.
  • This constant current through the resistor 6 causes a constant voltage drop across the resistor 6, which in turn serves to control the transistor 3.
  • the voltage drop across the resistor can be set more precisely by means of a Zener diode 14 connected in parallel with the resistor 6.
  • switchable constant current sources 20 shown in FIGS. 3a and 3b can also be used.
  • a transistor 15 is additionally provided here.
  • the base of the transistor is connected to the collector and point 9.
  • the emitter is connected to the connection of the resistor 10 facing away from ground.
  • the voltage drop across the voltage divider, consisting of resistors 10 and 11, can be set more precisely.
  • the switching time of the transistor 7 can thus also be controlled more precisely.
  • the resistor 6 is connected to the drain connection of a transistor 16.
  • the source connection of the transistor 16 is connected via a resistor 17 to a transistor 18 which is driven by the drive means 5A.
  • the connection point between the resistor 17 and the transistor 18 is connected to the gate terminal of the transistor 16.
  • the transistor 16 is preferably implemented as a self-conducting field effect transistor or as an N-channel depletion type field effect transistor.
  • the constant current source essentially consists only of the (self-conducting) N-channel transistor 16 and the resistor 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electromagnets (AREA)
EP94107828A 1993-06-25 1994-05-20 Dispositif d'excitation d'un consommateur électromagnétique. Withdrawn EP0631292A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934321127 DE4321127A1 (de) 1993-06-25 1993-06-25 Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers
DE4321127 1993-06-25

Publications (2)

Publication Number Publication Date
EP0631292A2 true EP0631292A2 (fr) 1994-12-28
EP0631292A3 EP0631292A3 (fr) 1995-04-12

Family

ID=6491203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94107828A Withdrawn EP0631292A3 (fr) 1993-06-25 1994-05-20 Dispositif d'excitation d'un consommateur électromagnétique.

Country Status (3)

Country Link
EP (1) EP0631292A3 (fr)
JP (1) JPH0799112A (fr)
DE (1) DE4321127A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519757C2 (de) * 1995-05-30 1997-04-24 Siemens Ag Freilaufkreis mit vorgebbarer AUS-Vorzugszeit für eine Spule
DE10229025A1 (de) * 2002-06-28 2004-03-25 Robert Bosch Gmbh Elektrische Schaltung zur Ansteuerung eines elektromagnetischen Verbrauchers
DE102008036120B4 (de) 2008-08-01 2010-04-08 Continental Automotive Gmbh Verfahren zur Steuerung einer Hochdruck-Kraftstoffpumpe
JP5882081B2 (ja) * 2012-02-24 2016-03-09 株式会社ニッキ インジェクタ駆動回路
JP5744144B2 (ja) * 2013-09-26 2015-07-01 三菱電機株式会社 誘導性負荷の給電制御装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3722527A1 (de) * 1987-07-08 1989-01-19 Vdo Schindling Verfahren und schaltungsanordnung zur ansteuerung eines einspritzventils
DE3733091A1 (de) * 1987-09-30 1989-04-20 Siemens Ag Verfahren und anordnung zum einstellen des laststroms durch eine induktive last, insbesondere durch ein kraftstoffeinspritzventil
WO1992000447A1 (fr) * 1990-06-23 1992-01-09 Robert Bosch Gmbh Procede et dispositif pour commander l'excitation d'un consommateur electromagnetique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3722527A1 (de) * 1987-07-08 1989-01-19 Vdo Schindling Verfahren und schaltungsanordnung zur ansteuerung eines einspritzventils
DE3733091A1 (de) * 1987-09-30 1989-04-20 Siemens Ag Verfahren und anordnung zum einstellen des laststroms durch eine induktive last, insbesondere durch ein kraftstoffeinspritzventil
WO1992000447A1 (fr) * 1990-06-23 1992-01-09 Robert Bosch Gmbh Procede et dispositif pour commander l'excitation d'un consommateur electromagnetique

Also Published As

Publication number Publication date
DE4321127A1 (de) 1995-01-05
EP0631292A3 (fr) 1995-04-12
JPH0799112A (ja) 1995-04-11

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