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WO1989003579A1 - Circuit arrangement for accelerating the supply to an electromagnetic consumer - Google Patents

Circuit arrangement for accelerating the supply to an electromagnetic consumer Download PDF

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Publication number
WO1989003579A1
WO1989003579A1 PCT/DE1988/000377 DE8800377W WO8903579A1 WO 1989003579 A1 WO1989003579 A1 WO 1989003579A1 DE 8800377 W DE8800377 W DE 8800377W WO 8903579 A1 WO8903579 A1 WO 8903579A1
Authority
WO
WIPO (PCT)
Prior art keywords
consumer
circuit arrangement
energy store
circuit
switch
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.)
Ceased
Application number
PCT/DE1988/000377
Other languages
German (de)
French (fr)
Inventor
Joachim Tauscher
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 WO1989003579A1 publication Critical patent/WO1989003579A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/04—Modifications for accelerating switching
    • H03K17/041—Modifications for accelerating switching without feedback from the output circuit to the control circuit
    • H03K17/0416—Modifications for accelerating switching without feedback from the output circuit to the control circuit by measures taken in the output circuit
    • H03K17/04163—Modifications for accelerating switching without feedback from the output circuit to the control circuit by measures taken in the output circuit in field-effect transistor switches
    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/04—Modifications for accelerating switching
    • H03K17/041—Modifications for accelerating switching without feedback from the output circuit to the control circuit
    • H03K17/0416—Modifications for accelerating switching without feedback from the output circuit to the control circuit by measures taken in the output circuit
    • H03K17/04166—Modifications for accelerating switching without feedback from the output circuit to the control circuit by measures taken in the output circuit in bipolar transistor switches
    • 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
    • F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
    • F02D2041/2006—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening by using a boost capacitor
    • 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
    • F02D2041/2068—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

  • Circuit arrangement for accelerating the supply of an electromagnetic consumer
  • the invention relates to a circuit arrangement for supplying an electromagnetic consumer with a supply voltage, with a driver circuit arranged in series with the consumer, which can be bridged by an extinguishing circuit for switching off the consumer.
  • a circuit arrangement is known, for example, from DE-OS 29 05 900 and is used to control the de-excitation time, that is to say the switch-off behavior, of an electromagnetic injection valve in internal combustion engines.
  • the quenching circuit is designed as a circuit arrangement with a controllable output voltage; the circuit arrangement works like a zener diode.
  • a Zener diode can be provided or, if a Zener diode is too weak, an amplifier with a downstream transistor. The switch-on behavior of the electromagnetic consumer cannot be influenced with the known circuit arrangement.
  • a circuit arrangement for quickly opening a solenoid valve is known, in which, after the end of the tightening time, the solenoid valve is kept de-energized for such a period of time that the solenoid valve falls off safely. Then such current flow is provided that the solenoid valve just does not respond. At the time of arrival, an additional signal is fed to the solenoid valve; this additional signal is taken from a memory, for example a capacitor.
  • an adjustable active clamping circuit for an inductive consumer which is supplied with current during operation by a driver transistor.
  • a voltage divider with a Darlington transistor is provided for quickly switching off the inductive load.
  • the Darlington transistor is switched off while the driver transistor is saturated and therefore supplies the consumer with current.
  • the driver transistor is switched off, the voltage divider switches on the Darlington transistor, and this derives the energy of the inductive consumer.
  • the energy contained in the electromagnetic consumer is therefore reduced either by a circuit arrangement with a controllable output voltage or by a Darlington transistor with an upstream voltage divider.
  • the known circuit working like a Zener diode is of relatively simple construction, but ⁇ flexible due to the fixed switching point of a Zener diode.
  • the known active clamping circuit which works with a voltage divider and Darlington transistor, is relatively complex. In both known circuits, which are provided for controlling the switch-off behavior of an electromagnetic consumer, the energy stored in the electromagnetic consumer flows away uselessly when switched off.
  • the circuit arrangement according to the invention for supplying an electromagnetic consumer with a supply voltage, with a driver circuit arranged in series with the consumer, which can be bridged by a quenching circuit for switching off the consumer, and in which at least one energy store for receiving the energy stored in the consumer is provided in the quenching circuit has the advantage of a particularly simple structure.
  • Such an energy store can be implemented, for example, as a capacitive energy store, that is to say as a capacitor.
  • the quenching circuit advantageously has a switching device which is arranged in series between the consumer and the energy store.
  • the switching device is advantageously designed as an electronic switch which has an input connection to which a switch-off signal can be applied.
  • the accelerated switching off of the electromagnetic consumer can be variably controlled in a simple and very precise manner by means of an external switch-off signal which is generated as a function of, for example, operating parameters.
  • a switching device arranged between the energy store and the supply voltage of the consumer is advantageously provided for switching on, which, like the switching device for switching off, is preferably an electronic switch which has an input connection to which a switch-on signal can be applied.
  • the switching on or off of the electromagnetic consumer can be influenced independently of one another by means of suitable switch-on or switch-off signals.
  • the further energy store is not constantly switched on, but rather can be switched on, for example, as a function of at least one operating parameter of the circuit arrangement.
  • the further energy store can be switched on and the acceleration of the electromagnetic consumer can be further accelerated by the additional energy stored therein.
  • FIG. 1 shows a preferred embodiment of the invention with a switch-off circuit for an inductor and an additional circuit
  • FIG. 2 shows an additional switch-on circuit which can additionally be provided in the embodiment shown in FIG. 1
  • FIG. 3a shows a diagram to show the time dependency 3b the time dependence of the current flowing through an inductive consumer.
  • the exemplary embodiment is a circuit arrangement for supplying a solenoid coil of a fuel injection valve for internal combustion engines with accelerated switch-on and switch-off.
  • a unipolar driver transistor TD is provided for supplying a magnetic coil L.
  • the magnet coil L is connected to the supply voltage with a connection via a diode Dl, the anode connection of which is connected to a supply voltage U (Batt.), And with its other connection to the driver transistor TD.
  • a switching signal, not specified, is applied to the gate terminal of the driver transistor TD to control it.
  • a voltage U r is therefore provided by the driver transistor TD.
  • an extinguishing circuit framed in FIG. 1 is also connected to the connection point between the solenoid L and the driver transistor TD.
  • the driver transistor TD is bridged by the series connection of a diode D3 and a capacitor C1.
  • the capacitor C1 serves as an energy store in order to absorb the energy stored by the solenoid valve L.
  • the emitter of an NPN transistor T1 is also connected to the anode of the diode D3 connected to the magnetic coil L, the collector of which is connected to the cathode of the diode D3 and to a connection of the capacitor C1.
  • the base of the transistor T1 is led to a connection point AI, to which a switch-off signal can be applied.
  • connection point between the cathode of the diode D3 and the capacitor C1 is connected to the collector of a further NPN transistor T2, the emitter connection of which leads to the connection point between the solenoid L and the cathode of the diode Dl.
  • the base connection of the transistor T2 is at a connection point El, to which a switch-on signal can be applied.
  • the capacitor C1 which is now charged up to a voltage U, can be discharged again in order to accelerate the switching on of the magnetic coil L, specifically in that the transistor T2 switches on due to a switch-on signal supplied at its base via the connection point E1, and so in FIG 1 upper end of the magnetic coil L is supplied with current.
  • connection terminals a, b, and c are provided in FIG. 1, which can be used to connect an additional switch-on circuit with an additional energy store.
  • This additional circuit is shown in Figure 2.
  • connection points a, b, c are used for connection to the corresponding connection points according to FIG. 1.
  • the anode of a diode D4 is connected to the connection point b, the cathode of which is connected to a further energy store, one Capacitor C2, is connected, the other connection of which is led to the connection point c.
  • the collector of a further switching transistor T3 is connected to the connection point between diode D4 and capacitor C2, the emitter of which is connected to connection point a and thus to the common connection of diode D1 and solenoid coil L in FIG.
  • the base connection of the switching transistor T3 leads to a connection point E2, to which a switch-on control voltage can be applied. This can be time-synchronous with the switch-on control voltage supplied to the base of the transistor T2 from FIG.
  • FIG. 3a shows the time dependence of the voltage on the energy storage capacitor (C1 or C2) as a dashed line and, with a solid line, the limit voltage U G from FIG. 1.
  • the inductive consumer L is the solenoid of an injection valve.
  • the capacitor C1 in FIG. 1 can be charged, for example, in a locking position of the cam of the injection valve, since in such a locking position the solenoid valve L has no defined work task.
  • the capacitor C1 can also be charged in the holding current region of the magnet coil L, a clocked holding current being used, the value of which is greater than the value IH u al, t. , mi.n the minimum, to hold the
  • Solenoid valve L necessary current.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

A circuit arrangement for supplying an electromagnetic consumer with a supply voltage has, in addition to a driving circuit connected in series to the consumer, which can be shorted out by a reset circuit in order to disconnect the consumer, at least one energy store in the reset circuit for receiving the energy stored in the consumer.

Description

Schaltungsanordnung zur Beschleunigung der Versorgung eines elektromagnetischen Verbrauchers Circuit arrangement for accelerating the supply of an electromagnetic consumer

Stand der TechnikState of the art

Die Erfindung betrifft eine Schaltungsanordnung zur Ver¬ sorgung eines elektromagnetischen Verbrauchers mit einer Versorgungsspannung, mit einer in Reihe zum Verbraucher angeordneten Treiberschaltung, die von einem Löschkreis zur Abschaltung des Verbrauchers überbrückbar ist. Eine derartige Schaltuπgsanordnung ist beispielsweise aus der DE-OS 29 05 900 bekannt und dient zur Steuerung der Entregungszeit , also des Abschaltverhaltens, eines elektro¬ magnetischen Einspritzventils bei Brennkraftmaschinen. Hierzu ist bei der bekannten Schaltung der Löschkreis als Schaltungsanordnung mit steuerbarer Auεgangsspannung ausgelegt; die Schaltungsanordnung funktioniert wie eine Zenerdiode. Nach diesem Stand der Technik kann eine Zener- diode vorgesehen werden oder, falls eine Zenerdiode zu schwach ist, ein Verstärker mit nachgeschaltetem Transis¬ tor. Das Einschaltverhalten des elektromagnetischen Verbrau¬ chers läßt sich mit der bekannten Schaltungsanordnung nicht beeinflussen.The invention relates to a circuit arrangement for supplying an electromagnetic consumer with a supply voltage, with a driver circuit arranged in series with the consumer, which can be bridged by an extinguishing circuit for switching off the consumer. Such a circuit arrangement is known, for example, from DE-OS 29 05 900 and is used to control the de-excitation time, that is to say the switch-off behavior, of an electromagnetic injection valve in internal combustion engines. For this purpose, in the known circuit the quenching circuit is designed as a circuit arrangement with a controllable output voltage; the circuit arrangement works like a zener diode. According to this prior art, a Zener diode can be provided or, if a Zener diode is too weak, an amplifier with a downstream transistor. The switch-on behavior of the electromagnetic consumer cannot be influenced with the known circuit arrangement.

Weiterhin ist beispielsweise aus der DE-OS 20 06 835 eine Schaltungsanordnung zum schnellen Öffnen eines Magnet¬ ventils bekannt, bei welchem nach Ende der Anzugszeit das Magnetventil für einen solchen Zeitraum stromlos gehalten wird, daß ein sicherer Abfall des Magnetventils erfolgt. Dann wird ein derartiger Stromfluß bereitgestellt, daß das Magnetventil gerade noch nicht anspricht. Im Aπzugszeitpunkt wird ein Zusatzsignal dem Magnetventil zugeführt; dieses Zusatzsignal wird einem Speicher ent¬ nommen, beispielsweise einem Kondensator.Furthermore, for example from DE-OS 20 06 835 a circuit arrangement for quickly opening a solenoid valve is known, in which, after the end of the tightening time, the solenoid valve is kept de-energized for such a period of time that the solenoid valve falls off safely. Then such current flow is provided that the solenoid valve just does not respond. At the time of arrival, an additional signal is fed to the solenoid valve; this additional signal is taken from a memory, for example a capacitor.

Schließlich ist beispielsweise aus der US-PS 3 705 333 eine einstellbare aktive Klemmschaltung für einen induktiven Verbraucher bekannt, der im Betrieb vom einem Treiber¬ transistor mit Strom versorgt wird. Zum schnellen Abschalten des induktiven Verbrauchers sind ein Spannungsteiler mit nachgeschaltetem Darlingtontransistor vorgesehen. Der Darlingtontransistor ist abgeschaltet, während der Treibertransistor gesättigt ist und daher den Verbraucher mit Strom versorgt. Beim Abschalten des Treibertransis¬ tors schaltet der Spannungsteiler den Darlingtontran¬ sistor ein und dieser leitet die Energie des induktiven Verbrauchers ab.Finally, from US Pat. No. 3,705,333, for example, an adjustable active clamping circuit for an inductive consumer is known, which is supplied with current during operation by a driver transistor. A voltage divider with a Darlington transistor is provided for quickly switching off the inductive load. The Darlington transistor is switched off while the driver transistor is saturated and therefore supplies the consumer with current. When the driver transistor is switched off, the voltage divider switches on the Darlington transistor, and this derives the energy of the inductive consumer.

Nach dem Stand der Technik wird daher beim Abschalten die im elektromagnetischen Verbraucher enthaltene Energie entweder durch eine Schaltungsanordnung mit steuerbarer Ausgangsspannung oder aber durch einen Darlingtontransistor mit vorgeschaltetem Spannungsteiler abgebaut. Die wie eine Zenerdiode arbeitende bekannte Schaltung ist zwar relativ einfach aufgebaut, jedoch aufgrund des festen Schaltpunkts einer Zenerdiode uπflexibel. Die bekannte aktive Klemmschaltung, die mit einem Spannungsteiler und Darlingtontransistor arbeitet, ist dagegen verhältnis¬ mäßig aufwendig. Bei beiden bekannten Schaltungen, die zur Steuerung des Ausschaltverhaltens eines elektromagne¬ tischen Verbrauchers vorgesehen sind, fließt die in dem elektromagnetischen Verbraucher gespeicherte Energie beim Abschalten gleichsam nutzlos ab. Vorteile der ErfindungAccording to the prior art, the energy contained in the electromagnetic consumer is therefore reduced either by a circuit arrangement with a controllable output voltage or by a Darlington transistor with an upstream voltage divider. The known circuit working like a Zener diode is of relatively simple construction, but πflexible due to the fixed switching point of a Zener diode. In contrast, the known active clamping circuit, which works with a voltage divider and Darlington transistor, is relatively complex. In both known circuits, which are provided for controlling the switch-off behavior of an electromagnetic consumer, the energy stored in the electromagnetic consumer flows away uselessly when switched off. Advantages of the invention

Die erfindungsgemäße Schaltungsanordnung zur Versorgung eines elektromagnetischen Verbrauchers mit einer Ver¬ sorgungsspannung, mit einer in Reihe zum Verbraucher angeordneten Treiberschaltung, die von einem Löschkreiε zur Abschaltung des Verbrauchers überbrückbar ist, und bei welcher im Löschkreis zumindest ein Energiespeicher zur Aufnahme der im Verbraucher gespeicherten Energie vorgesehen ist, hat insbesondere den Vorteil eines besonders einfachen Aufbaus. Ein derartiger Energiespeicher läßt sich beispielsweise als kapazitiver Energiespeicher reali¬ sieren, also als Kondensator. Durch den erfindungsgemäßen Energiespeicher läßt sich die dort gespeicherte Energie, wie nachstehend noch genauer erläutert wird, in vorteil¬ hafter Weise für weitere Zwecke nutzen.The circuit arrangement according to the invention for supplying an electromagnetic consumer with a supply voltage, with a driver circuit arranged in series with the consumer, which can be bridged by a quenching circuit for switching off the consumer, and in which at least one energy store for receiving the energy stored in the consumer is provided in the quenching circuit has the advantage of a particularly simple structure. Such an energy store can be implemented, for example, as a capacitive energy store, that is to say as a capacitor. By means of the energy store according to the invention, the energy stored there, as will be explained in more detail below, can advantageously be used for further purposes.

Vorteilhafterweise weist der Löεchkreis eine Schalteinrich¬ tung auf, die in Serie zwischen dem Verbraucher und dem Energiespeicher angeordnet ist. Durch Schalten der Schalt¬ einrichtung in einem gewünschten Zeitpunkt läßt sich das Abschaltverhalten der erfiπduπgsgemäßen Schaltungs- anordnuπg variieren und damit an unterschiedliche Einsatz¬ zwecke oder Betriebsparameter anpassen. Hierzu ist vorteil¬ hafterweise die Schalteinrichtung als ein elektronischer Schalter ausgebildet, der einen Eingaπgsanschluß aufweist, an den ein Abschaltsignal anlegbar ist. Durch ein externes Abschaltsignal, welches in Abhängigkeit von beispielsweise Betriebsparametern erzeugt wird, läßt sich auf einfache Weise und sehr präzise das beschleunigte Ausschalten des elektromagnetischen Verbrauchers variabel steuern. Ein besonders deutlicher Vorteil ergibt sich, wenn gemäß einer besonders vorteilhaften Ausgestaltung der Erfindung die im Energiespeicher gespeicherte Energie dem Verbraucher steuerbar beim Einschalten zuführbar ist. Hierdurch läßt sich nicht nur das Ausschaltverhalten des elektromagneti- - Er ¬The quenching circuit advantageously has a switching device which is arranged in series between the consumer and the energy store. By switching the switching device at a desired point in time, the switch-off behavior of the circuit arrangement according to the invention can be varied and thus adapted to different purposes or operating parameters. For this purpose, the switching device is advantageously designed as an electronic switch which has an input connection to which a switch-off signal can be applied. The accelerated switching off of the electromagnetic consumer can be variably controlled in a simple and very precise manner by means of an external switch-off signal which is generated as a function of, for example, operating parameters. A particularly clear advantage arises if, according to a particularly advantageous embodiment of the invention, the energy stored in the energy store can be supplied to the consumer in a controllable manner when it is switched on. This means that not only the switch-off behavior of the electromagnetic - E r ¬

sehen Verbrauchers steuern, sondern ebenfalls dessen Einschaltverhalten, und zwar mit äußerst geringem zusätz¬ lichem Bauteilaufwand, da ja derselbe Energiespeicher, der beim Abschalten des Verbrauchers die Energie aufnimmt, diese Energie beim Einschalten des elektromagnetischen Verbrauchers diesem zur Beschleunigung des Eiπschaltenε zuführt.see consumer control, but also its switch-on behavior, and with extremely little additional component effort, since the same energy store, which absorbs the energy when the consumer is switched off, supplies this energy when the electromagnetic consumer is switched on in order to accelerate the switch-on.

Daher ist vorteilhafterweise auch zum Einschalten eine zwischen dem Energiespeicher und der Versorgungsspannung des Verbrauchers angeordnete Schalteiπrichtung vorgesehen, die ebenso wie die Schalteinrichtung für das Ausschalten vorzugsweise ein elektronischer Schalter ist, der einen Eingangsanschluß aufweist, an den ein Einschaltsignal anlegbar ist. Auf diese Weise läßt sich mittels geeigneter Ein- beziehungsweise Ausschaltsignale unabhängig vonein¬ ander das Ein- beziehungsweise Ausschalten des elektromagne¬ tischen Verbrauchers beeinflussen.Therefore, a switching device arranged between the energy store and the supply voltage of the consumer is advantageously provided for switching on, which, like the switching device for switching off, is preferably an electronic switch which has an input connection to which a switch-on signal can be applied. In this way, the switching on or off of the electromagnetic consumer can be influenced independently of one another by means of suitable switch-on or switch-off signals.

Wenn zumindest ein weiterer Energiespeicher, zusätzlich zu dem ersten Energiespeicher, vorgesehen ist, so lassen sich mit der erfindungsgemäßen Schaltungsanordnung weitere Einsatzzwecke abdecken. In diesem Zusammenhang ist es insbesondere von Vorteil, wenn der weitere Energiespeicher nicht ständig zugeschaltet ist, sondern beispielsweise in Abhängigkeit von zumindest einem Betriebsparameter der Schaltungsanordnung zuschaltbar ist. So kann bei¬ spielsweise für den Fall, daß aufgrund der Änderung eines Betriebsparameters ein besonders schnelles Einschalten des elektromagnetischen Verbrauchers erforderlich ist, der weitere Energiespeicher zugeschaltet werden und durch die zusätzliche darin gespeicherte Energie den Einschalt¬ vorgang des elektromagnetischen Verbrauchers weiter beschleu¬ nigen . ZeichnungIf at least one further energy store is provided, in addition to the first energy store, then other uses can be covered with the circuit arrangement according to the invention. In this context, it is particularly advantageous if the further energy store is not constantly switched on, but rather can be switched on, for example, as a function of at least one operating parameter of the circuit arrangement. For example, in the event that a particularly quick switch-on of the electromagnetic consumer is required due to the change in an operating parameter, the further energy store can be switched on and the acceleration of the electromagnetic consumer can be further accelerated by the additional energy stored therein. drawing

Die Erfindung wird nachstehend anhand zeichnerisch darge¬ stellter bevorzugter Ausführuπgsbeispiele näher erläutert, aus welchen weitere Vorteile und Merkmale hervorgehen. Figur 1 zeigt eine bevorzugte Ausführungsform der Erfindung mit einem Ausschaltkreis für eine Induktivität und einem zusätzlichen Eiπschaltkreis , Figur 2 einen zusätzlichen Einschaltkreis , der zusätzlich bei der in Figur 1 darge¬ stellten Ausführungsform vorgesehen werden kann, Figur 3a ein Diagramm zur Darstellung der zeitlichen Abhängig¬ keit der Spannung an einem Energiespeicher und Figur 3b die zeitliche Abhängigkeit des durch einen induktiven Verbraucher fließenden Stroms.The invention is explained in more detail below on the basis of preferred exemplary embodiments shown in the drawings, from which further advantages and features emerge. FIG. 1 shows a preferred embodiment of the invention with a switch-off circuit for an inductor and an additional circuit, FIG. 2 shows an additional switch-on circuit which can additionally be provided in the embodiment shown in FIG. 1, FIG. 3a shows a diagram to show the time dependency 3b the time dependence of the current flowing through an inductive consumer.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Beim Ausführungsbeispiel handelt es sich um eine Schaltungs¬ anordnung zur Versorgung einer Magnetspule eines Brennstoff- Einspritzventils für Brennkraftmaschinen mit beschleunigter Einschaltung und beschleunigter Ausschaltung.The exemplary embodiment is a circuit arrangement for supplying a solenoid coil of a fuel injection valve for internal combustion engines with accelerated switch-on and switch-off.

Bei der in Figur 1 dargestellten Schaltungsanordnung ist ein unipolarer Treibertransiεtor TD zur Versorgung einer Magnetspule L vorgesehen. Die Magnetspule L ist mit einem Anschluß über eine Diode Dl, deren Anodenanschluß mit einer Versorgungsspannuπg U(Batt.) verbunden ist, an die Versorgungsspannung angeschlossen und mit ihrem anderen Anschluß an den Treibertransistor TD. An den Gate-Anschluß des Treibertransistors TD wird zu dessen Steuerung ein nicht näher bezeichnetes Schaltsignal ange¬ legt. Weiterhin ist an den Verbindungspunkt zwischen Magnetspule L und Treibertransistor TD die Kathode einer Zenerdiode DZ angeschlossen, deren Anode mit der Anode einer weiteren Diode D2 verbunden ist, deren Kathode mit dem anderen, der Magnetspule L abgewandten Anschluß des Treibertransistors TD verbunden ist. Insgesamt wird daher durch den Treibertransistor TD eine Spannung Ur bereitgestellt.In the circuit arrangement shown in FIG. 1, a unipolar driver transistor TD is provided for supplying a magnetic coil L. The magnet coil L is connected to the supply voltage with a connection via a diode Dl, the anode connection of which is connected to a supply voltage U (Batt.), And with its other connection to the driver transistor TD. A switching signal, not specified, is applied to the gate terminal of the driver transistor TD to control it. Furthermore, the cathode of a Zener diode DZ, the anode of which is connected to the anode, is connected to the connection point between the solenoid L and the driver transistor TD a further diode D2 is connected, the cathode of which is connected to the other terminal of the driver transistor TD facing away from the magnetic coil L. Overall, a voltage U r is therefore provided by the driver transistor TD.

Zur Beschleunigung des Ausschaltens ist an den Verbindungε- punkt zwischen der Magnetspule L und dem Treibertransistor TD weiterhin ein in Figur 1 gestrichelt umrahmter Lösch¬ kreis angeschlossen. Im einzelnen ist hierzu der Treiber¬ transistor TD durch die Reihenschaltung einer Diode D3 und eines Kondensators Cl überbrückt. Der Kondensator Cl dient als Energiespeicher, um die vom Magnetventil L gespeicherte Energie aufzunehmen. An die mit der Magnet¬ spule L verbundene Anode der Diode D3 ist weiterhin der Emitter eines NPN-Transistors Tl angeschlossen, dessen Kollektor mit der Kathode der Diode D3 sowie mit einem Anschluß des Kondensators Cl verbunden ist. Die Basis des Transistors Tl ist an einen Anschlußpunkt AI geführt, an welchen ein Abschaltsignal angelegt werden kann.In order to accelerate the switch-off, an extinguishing circuit framed in FIG. 1 is also connected to the connection point between the solenoid L and the driver transistor TD. In detail, the driver transistor TD is bridged by the series connection of a diode D3 and a capacitor C1. The capacitor C1 serves as an energy store in order to absorb the energy stored by the solenoid valve L. The emitter of an NPN transistor T1 is also connected to the anode of the diode D3 connected to the magnetic coil L, the collector of which is connected to the cathode of the diode D3 and to a connection of the capacitor C1. The base of the transistor T1 is led to a connection point AI, to which a switch-off signal can be applied.

Weiterhin ist der Verbindungspunkt zwischen Kathode der Diode D3 und dem Kondensator Cl mit dem Kollektor eines weiteren NPN-Transistors T2 verbunden, dessen Emitteran¬ schluß zum Verbindungspunkt zwischen Magnetspule L und der Kathode der Diode Dl geführt ist. Der Basisanschluß des Transistors T2 liegt an einem Aπschlußpunkt El, an den ein Einschaltsignal angelegt werden kann.Furthermore, the connection point between the cathode of the diode D3 and the capacitor C1 is connected to the collector of a further NPN transistor T2, the emitter connection of which leads to the connection point between the solenoid L and the cathode of the diode Dl. The base connection of the transistor T2 is at a connection point El, to which a switch-on signal can be applied.

Beim Abschalten des Treibertransistors TD wird ein ent¬ sprechendes Abschaltsignal an den Basisanschluß AI des Transistors Tl angelegt und daher die in der Magnetspule L vorhandene Energie als Spulenstrom I. in den Kondensator Cl überführt. -When the driver transistor TD is switched off, a corresponding switch-off signal is applied to the base connection AI of the transistor T1 and therefore the energy present in the magnet coil L is transferred as a coil current I to the capacitor C1. -

Der jetzt bis auf eine Spannung U , aufgeladene Konden¬ sator Cl kann zur Beschleunigung des Einschaltens der Magnetspule L wieder entladen werden, und zwar dadurch, daß der Transistor T2 aufgrund eines an seiner Basis über den Anschlußpunkt El zugeführten Einschaltsignals durchschaltet und so das in Figur 1 obere Ende der Magnet¬ spule L mit Strom versorgt.The capacitor C1, which is now charged up to a voltage U, can be discharged again in order to accelerate the switching on of the magnetic coil L, specifically in that the transistor T2 switches on due to a switch-on signal supplied at its base via the connection point E1, and so in FIG 1 upper end of the magnetic coil L is supplied with current.

Weiterhin sind in Figur 1 zusätzliche Anschlußklemmen a, b, und c vorgesehen, die zum Anschluß eines zusätz¬ lichen Einschaltkreises mit zusätzlichem Energiespeicher dienen können. Diese zusätzliche Schaltung ist in Figur 2 dargestellt. Bei der in Figur 2 gezeigten Schaltung dienen Anschlußpunkte a, b, c zum Anschluß an die ent¬ sprechenden Anschlußpunkte gemäß Figur 1. An den Aπschluß- punkt b ist die Anode einer Diode D4 angeschlossen, deren Kathode mit einem Anschluß eines weiteren Energiespeichers, eines Kondensators C2, verbunden ist, dessen anderer Anschluß zum Anschlußpunkt c geführt ist. An den Ver- bindungspuπkt zwischen Diode D4 und Kondensator C2 ist der Kollektor eines weiteren Schalttransistors T3 ange¬ schlossen, dessen Emitter mit dem Anschlußpunkt a und damit dem gemeinsamen Anschluß von Diode Dl und Magnet¬ spule L in Figur 1 verbunden ist. Der Basisanschluß des Schalttraπsistors T3 führt zu einem Aπschlußpunkt E2, an welchen eine Einschaltsteuerspannung angelegt werden kann. Diese kann zeitsynchron mit der an der Basis des Transistors T2 von Figur 1 über den Anschlußpunkt El zugeführten Einschaltsteuerspannung verlaufen, aber bei¬ spielsweise auch zeitversetzt sein.Furthermore, additional connection terminals a, b, and c are provided in FIG. 1, which can be used to connect an additional switch-on circuit with an additional energy store. This additional circuit is shown in Figure 2. In the circuit shown in FIG. 2, connection points a, b, c are used for connection to the corresponding connection points according to FIG. 1. The anode of a diode D4 is connected to the connection point b, the cathode of which is connected to a further energy store, one Capacitor C2, is connected, the other connection of which is led to the connection point c. The collector of a further switching transistor T3 is connected to the connection point between diode D4 and capacitor C2, the emitter of which is connected to connection point a and thus to the common connection of diode D1 and solenoid coil L in FIG. The base connection of the switching transistor T3 leads to a connection point E2, to which a switch-on control voltage can be applied. This can be time-synchronous with the switch-on control voltage supplied to the base of the transistor T2 from FIG.

Selbstverständlich ist es bei entsprechendem Bedarf auch möglich, mehrere zusätzliche Einschaltkreise , wie sie in Figur 2 dargestellt sind, an die in Figur 1 gezeigte - ö -Of course, it is also possible, if required, to connect several additional switch-on circuits, as shown in FIG. 2, to the one shown in FIG - ö -

bevorzugte Ausführungsform anzuschließen.preferred embodiment to connect.

Figur 3a zeigt die zeitliche Abhängigkeit der Spannung am Energiespeicher-Kondensator (Cl oder C2) als gestrichelte Linie sowie mit einer durchgezogenen Linie die Grenzspannung UG von Figur 1.FIG. 3a shows the time dependence of the voltage on the energy storage capacitor (C1 or C2) as a dashed line and, with a solid line, the limit voltage U G from FIG. 1.

Wie voranstehend erwähnt ist bei dem in Figur 1 darge¬ stellten Ausführungsbeispiel der Erfindung der induktive Verbraucher L die Magnetspule eines Eiπspritzveπtils . Die Ladung des Kondensators Cl in Figur 1 kann beispiels¬ weise in einer Raststellung des Nockens des Einspritz- veπtils erfolgen, da in einer derartigen Raststellung das Magnetventil L ohne definierte Arbeitsaufgabe ist. Andererseits kann aber auch, und dies ist in Figur 3b gezeigt, eine Aufladung des Kondensators Cl im Halte¬ strombereich der Magnetspule L erfolgen, wobei ein getakte- ter Haltestrom verwendet wird, dessen Wert größer ist als der Wert IHual,t. ,mi.n des minimalen, zum Halten desAs mentioned above, in the exemplary embodiment of the invention shown in FIG. 1, the inductive consumer L is the solenoid of an injection valve. The capacitor C1 in FIG. 1 can be charged, for example, in a locking position of the cam of the injection valve, since in such a locking position the solenoid valve L has no defined work task. On the other hand, however, and this is shown in FIG. 3b, the capacitor C1 can also be charged in the holding current region of the magnet coil L, a clocked holding current being used, the value of which is greater than the value IH u al, t. , mi.n the minimum, to hold the

Magnetventils L notwendigen Stroms. Solenoid valve L necessary current.

Claims

_ Q _Ansprüche _ Q _ Claims 1. Schaltungsanordnung zur Versorgung eines elektro¬ magnetischen Verbrauchers mit einer Versorgungsspaπnung , mit einer in Reihe zum Verbraucher angeordneten Treiber¬ schaltung, die von einem Löschkreis zur Abschaltung des Verbrauchers überbrückbar ist, dadurch gekennzeichent , daß im Löschkreis (D3, Cl, Tl) zumindest ein Energie¬ speicher (Cl) zur Aufnahme der im Verbraucher (L) gespei¬ cherten Energie vorgesehen ist.1. Circuit arrangement for supplying an electromagnetic consumer with a supply voltage, with a driver circuit arranged in series with the consumer and which can be bridged by an extinguishing circuit for switching off the consumer, characterized in that at least in the extinguishing circuit (D3, Cl, Tl) an energy store (Cl) is provided for receiving the energy stored in the consumer (L). 2. Schaltungsanordnung nach Anspruch 1, dadurch gekenn¬ zeichnet, daß der Löschkreiε eine Schalteinrichtung (Tl) aufweist, die in Reihe zwischen dem Verbraucher (L) und dem Energiespeicher (Cl) angeordnet ist.2. Circuit arrangement according to claim 1, characterized gekenn¬ characterized in that the Löschkreiε has a switching device (Tl) which is arranged in series between the consumer (L) and the energy store (Cl). 3. Schaltungsanordπung nach Anspruch 2, dadurch gekenn¬ zeichnet, daß die Schalteinrichtung ein elektronischer Schalter (Tl) ist, der einen Eingangsanεchluß (AI) aufweist, an den ein Abschaltsignal anlegbar ist.3. Circuit arrangement according to claim 2, characterized in that the switching device is an electronic switch (Tl) which has an input connection (AI) to which a switch-off signal can be applied. 4. Schaltungsanordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die im Energiespeicher (Cl) gespeicherte Energie dem Verbraucher (L) steuerbar beim Einschalten zuführbar ist. 4. Circuit arrangement according to one of claims 1 to 3, characterized in that the energy stored in the energy store (Cl) the consumer (L) is controllable when switching on supply. 5. Schaltungsanordnung nach Anspruch 4, dadurch gekenn¬ zeichnet, daß eine zwischen dem Energiespeicher (Cl) und der Versorgungsspanπung (U(Batt.)) des Verbrauchers (L) angeordnete Schalteinrichtung (T2) vorgesehen ist.5. Circuit arrangement according to claim 4, characterized gekenn¬ characterized in that between the energy store (Cl) and the supply voltage (U (Batt.)) Of the consumer (L) arranged switching device (T2) is provided. 6. Schaltungsanordnung nach Anspruch 5, dadurch gekenn¬ zeichnet, daß die Schalteinrichtung ein elektronischer Schalter (T2) ist, der einen Eingaπgsanschluß (El) aufweist, an den ein Einschaltsignal anlegbar ist.6. Circuit arrangement according to claim 5, characterized gekenn¬ characterized in that the switching device is an electronic switch (T2) having an input port (El) to which a switch-on signal can be applied. 7. Schaltungsanordnung nach einem der Anprüche 4 bis 6, dadurch gekennzeichnet, daß zumindest ein weiterer Energiespeicher (C2) vorgesehen ist.7. Circuit arrangement according to one of claims 4 to 6, characterized in that at least one further energy store (C2) is provided. 8. Schaltuπgsanordnung nach Anspruch 7, dadurch gekenn¬ zeichnet, daß der weitere Energiespeicher (C2) in Ab¬ hängigkeit von zumindest einem Betriebsparameter der Schaltungsanordnung zuschaltbar ist.8. Circuit arrangement according to claim 7, characterized in that the further energy store (C2) can be switched on as a function of at least one operating parameter of the circuit arrangement. 9. Schaltungsanordnung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der erste (Cl) und/oder zweite Energiespeicher (C2) ein kapazitiver Energiespeicher ist . 9. Circuit arrangement according to one of claims 1 to 8, characterized in that the first (Cl) and / or second energy store (C2) is a capacitive energy store.
PCT/DE1988/000377 1987-10-12 1988-06-24 Circuit arrangement for accelerating the supply to an electromagnetic consumer Ceased WO1989003579A1 (en)

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DE19873734415 DE3734415A1 (en) 1987-10-12 1987-10-12 CIRCUIT ARRANGEMENT FOR ACCELERATING THE SUPPLY OF AN ELECTROMAGNETIC CONSUMER
DEP3734415.3 1987-10-12

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DE4413546A1 (en) * 1994-04-19 1995-10-26 Walter Marks DC control circuit
DE19706247B4 (en) * 1997-02-18 2005-05-19 Burgert, Markus Circuit arrangement for controlling electromagnets and regulating the coil current
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DE10202279A1 (en) * 2002-01-22 2003-08-07 Siemens Ag Control circuit for an actuator

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