EP0720770B1 - Process and device for driving an electromagnetic consumer - Google Patents
Process and device for driving an electromagnetic consumer Download PDFInfo
- Publication number
- EP0720770B1 EP0720770B1 EP95924843A EP95924843A EP0720770B1 EP 0720770 B1 EP0720770 B1 EP 0720770B1 EP 95924843 A EP95924843 A EP 95924843A EP 95924843 A EP95924843 A EP 95924843A EP 0720770 B1 EP0720770 B1 EP 0720770B1
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- European Patent Office
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- current
- regulator output
- load
- output voltage
- switching time
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 14
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Images
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
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
-
- 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
- H01F7/1844—Monitoring or fail-safe circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- 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
- F02D2041/2017—Output circuits, e.g. for controlling currents in command coils using means for creating a boost current or using reference switching
-
- 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
- F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
-
- 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
- the invention relates to a method and a device to control an electromagnetic consumer according to the preambles of the independent claims.
- Such a method and such a device for Actuation of an electromagnetic consumer for example from DE-OS 34 26 799 (US-A 4,653,447) known.
- the consumer is in line with one Current control means switched.
- the current control means is with a controller output voltage can be applied, the Controller output voltage depending on a control device a comparison between an actual value and a setpoint for the current that flows through the consumer or the Voltage that drops at the consumer can be specified. It are the switching times and, based on this, the Switch-on times and switch-off times of a solenoid valve detected. Based on the time course of the current through the solenoid valve is the exact switching time of the Solenoid valve determined.
- Such solenoid valves are preferably used to control the Injection of fuels in petrol and / or diesel engines used. For exact metering of even the smallest injection quantities the time of switching is of particular interest, in which the armature of the solenoid valve is one of its reached both end positions.
- the procedure is such that in one Time window within which the switching time is usually occurs, the current curve and / or the voltage curve is evaluated and based on its temporal course of the Switching time is determined. This is the on the solenoid valve applied voltage or the current flowing through the solenoid valve Current adjusted to a certain value. So it will a constant solenoid valve voltage or current for generation a steady course of the solenoid valve current or voltage provided.
- the invention has for its object in a method and a device for controlling an electromagnetic Consumer, of the type mentioned, the To simplify detection of the switching time.
- FIG. 2 various signals plotted over time.
- the exemplary embodiment described is a device for controlling an electromagnetic Consumer.
- the device described is and the described method in connection with any electromagnetic consumers can be used. she is not limited to the specific application. Particularly advantageous is, however, the device according to the invention and that Methods according to the invention in connection with internal combustion engines used, in particular when metering Fuel in a combustion chamber of a self-igniting internal combustion engine. For this purpose it is particularly advantageous Way a solenoid valve to control the metering of Fuel used in the internal combustion engine.
- FIG. 1 are essential elements of the device schematically for controlling a solenoid-controlled fuel metering device shown.
- An electromagnetic one Consumer 100, a current control means 110, and a current measuring means 120 are in series between a supply voltage Ubat and ground switched.
- An ohmic resistor is preferably used as the current measuring means 120 used.
- A is preferably used as the current control means Transistor, in particular a field effect transistor.
- Consumer 100 is an inductive one Resistance, especially a coil of a solenoid valve.
- the two connections of the current measuring means 120 are connected to a current detection 130.
- the current detection 130 acts on a node 135 with the actual value I actual for the current.
- a setpoint I Soll for the current is present at the second input of node 135.
- the target value I target is provided by a controller 140.
- a Current regulator 150 With the output signal of node 135 is a Current regulator 150, in particular an analog regulator, is applied.
- the output signal UR, IR of the current regulator 150 arrives via a manipulated variable detection 160 to the control connection of the current control means 110.
- a Field effect transistor is the control connection around the gate of the field effect transistor.
- An ohmic resistor is preferably used as the manipulated variable detection 160.
- the BIP detection 170 applies a signal to the controller 140.
- BIP detection 170 is preferably designed as a comparator that evaluates the voltage drop across resistor 160. As soon as the differentiated output voltage U R becomes less than zero, the BIP detection 170 generates an output signal. Based on the differentiated control output voltage or the direction of flow of the controller output current, the BIP detection detects the switching time.
- a control signal U Ein is plotted over time T in the first line. This signal indicates whether the control unit 140 forwards a target value I target to the node 135.
- the current I MV flowing through the solenoid valve is plotted in the second line.
- the regulator voltage U R present at the output of the regulator 150 is plotted in the fourth line, the differentiated regulator output voltage or the regulator output current I R.
- the output signal of the BIP acquisition 170 U BIP is plotted.
- the control device 140 does not emit a signal until the time t1 .
- the current control means 110 interrupts the flow of current through the consumer 100 and the solenoid valve is not activated.
- control unit 140 specifies a setpoint. This means that the output signal U Ein takes on an increased value. Since the current flowing through the solenoid valve has not yet reached its desired value, the result of this is that a value other than 0 is present at the output of node 135.
- the controller 150 then outputs a corresponding manipulated variable U R which increases from 0 to a value. This means that the gate of the current control means is charged by means of a current. The current I R therefore rises very quickly. This in turn has the consequence that the current control means 110 releases the current flow I MV and the current, I MV increases over time.
- the manipulated variable U R reaches its maximum value and the current I R drops.
- the current I MV flowing through the solenoid valve reaches its target value I target .
- the output variable U R of the controller 150 changes. It takes on a smaller value than before. This in turn causes the current I R to assume negative values for a short time. It changes its sign at time t2 . This in turn causes the BIP detection 170 to emit a signal at time t2 which indicates a change in the current direction.
- the armature of the solenoid valve reaches its new end position. This in turn causes the inductance of the coil to change.
- the change in the inductance of the coil causes a discontinuity in the output signal U R of the regulator 150, which results in a change of sign or a change in the current I R.
- This change in the sign of the current I R in turn causes the BIP detection 170 to output a pulse signal to the controller 140 at the time t3 .
- the control device 140 recognizes the second pulse of the signal U BIP as the switching time of the solenoid valve and evaluates this signal accordingly.
- the GDP detection suppresses the first pulse at time t2 .
- a solenoid valve the switching time (BIP) by evaluating the manipulated variable of a current regulator is obtained.
- a current regulator an analog controller.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Magnetically Actuated Valves (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und einen Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers gemäß den Oberbegriffen der unabhängigen Ansprüche.The invention relates to a method and a device to control an electromagnetic consumer according to the preambles of the independent claims.
Ein solches Verfahren und eine solche Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers ist beispielsweise aus der DE-OS 34 26 799 (US-A 4,653,447) bekannt. Hier ist der Verbraucher in Reihe mit einem Stromsteuermittel geschaltet. Das Stromsteuermittel ist mit einer Reglerausgangsspannung beaufschlagbar, wobei die Reglerausgangsspannung von einem Regelmittel abhängig von einem Vergleich zwischen einem Istwert und einem Sollwert für den Strom, der durch den Verbraucher fließt, oder die Spannung, die am Verbraucher abfällt, vorgebbar ist. Es werden die Schaltzeitpunkte und davon ausgehend die Einschaltzeiten und Ausschaltzeiten eines Magnetventils erfaßt. Ausgehend von dem zeitlichen Verlauf des Stroms durch das Magnetventil wird der genaue Schaltzeitpunkt des Magnetventils bestimmt.Such a method and such a device for Actuation of an electromagnetic consumer for example from DE-OS 34 26 799 (US-A 4,653,447) known. Here the consumer is in line with one Current control means switched. The current control means is with a controller output voltage can be applied, the Controller output voltage depending on a control device a comparison between an actual value and a setpoint for the current that flows through the consumer or the Voltage that drops at the consumer can be specified. It are the switching times and, based on this, the Switch-on times and switch-off times of a solenoid valve detected. Based on the time course of the current through the solenoid valve is the exact switching time of the Solenoid valve determined.
Ferner ist ein Verfahren und eine Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers aus der US-4,612,597 bekannt. Diese Schrift zeigt ebenfalls eine Vorgehensweise zur Bestimmung des Schaltzeitpunktes eines elektromagnetischen Verbrauchers. Es ist vorgesehen, daß der Strom durch den Verbraucher auf einen vorgegebenen Wert geregelt wird. Zur Erkennung des Schaltzeitpunktes wird das Tastverhältnis, daß ausgehend von der Regelabweichung gebildet wird, verwendet. Bei einer Änderung des Tastverhältnisses wird der Schaltzeitpunkt erkannt. Diese Schrift zeigt aber nicht, daß die differenzierte Reglerausgangsspannung oder der Reglerausgangsstrom zur Ermittlung des Schaltzeitpunktes ausgewertet wird.Furthermore, a method and a device for control an electromagnetic consumer from US-4,612,597 known. This document also shows a procedure to determine the switching time of a electromagnetic consumer. It is envisaged that the Electricity through the consumer to a predetermined value is regulated. To recognize the switching time, this is Duty cycle that based on the control deviation is used. If the Duty cycle, the switching time is recognized. This Scripture does not show that the differentiated Controller output voltage or the controller output current for Determination of the switching time is evaluated.
Solche Magnetventile werden vorzugsweise zur Steuerung der Einspritzung von Kraftstoffen in Benzin und/oder Dieselmotoren eingesetzt. Zur exakten Zumessung auch kleinster Einspritzmengen ist insbesondere der Schaltzeitpunkt von Interesse, bei dem der Anker des Magnetventils jeweils eine seiner beiden Endlagen erreicht.Such solenoid valves are preferably used to control the Injection of fuels in petrol and / or diesel engines used. For exact metering of even the smallest injection quantities the time of switching is of particular interest, in which the armature of the solenoid valve is one of its reached both end positions.
Bei bekannten Systemen wird derart vorgegangen, daß in einem Zeitfenster, innerhalb dem der Schaltzeitpunkt üblicherweise auftritt, der Stromverlauf und/oder der Spannungsverlauf ausgewertet wird und anhand dessen zeitlichen Verlaufs der Schaltzeitpunkt bestimmt wird. Dabei wird die am Magnetventil anliegende Spannung bzw. der durch das Magnetventil fließende Strom auf einen bestimmten Wert eingeregelt. Es wird also eine konstante Magnetventilspannung bzw. Strom zur Erzeugung eines stetigen Verlaufs des Magnetventilstroms oder Spannung bereitgestellt.In known systems, the procedure is such that in one Time window within which the switching time is usually occurs, the current curve and / or the voltage curve is evaluated and based on its temporal course of the Switching time is determined. This is the on the solenoid valve applied voltage or the current flowing through the solenoid valve Current adjusted to a certain value. So it will a constant solenoid valve voltage or current for generation a steady course of the solenoid valve current or voltage provided.
Hierzu ist es erforderlich, daß eine spezielle Ansteuerphase, die üblicherweise als BIP-Fenster bezeichnet wird, definiert wird, innerhalb der eine spezielle Ansteuerung erfolgen muß, damit eine Erkennung des Schaltzeitpunktes möglich ist. Ferner ist die Auswertung des Stromverlaufs sehr aufwendig.For this it is necessary that a special control phase, which is commonly referred to as a GDP window within which a special control must take place, so that a detection of the switching time is possible. Furthermore, the evaluation of the current profile is very complex.
Der Erfindung liegt die Aufgabe zugrunde, bei einem Verfahren und einer Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers, der eingangs genannten Art, die Erkennung des Schaltzeitpunktes zu vereinfachen.The invention has for its object in a method and a device for controlling an electromagnetic Consumer, of the type mentioned, the To simplify detection of the switching time.
Dadurch daß zur Ermittlung eines Schaltzeitpunktes (BIP) des elektromagnetischen Verbrauchers die differenzierte Reglerausgangsspannung (UR) oder der Reglerausgangsstrom (IR) ausgewertet wird, kann der Aufwand zur Ermittlung des Schaltzeitpunktes minimiert werden. Desweiteren ist das Verfahren universell an verschiedene Magnetventiltypen anpaßbar. Der Aufwand an Schaltungsmitteln ist sehr gering.The fact that to determine a switching time (GDP) of electromagnetic consumer the differentiated Controller output voltage (UR) or the controller output current (IR) is evaluated, the effort to determine the Switching time can be minimized. Furthermore, that is Process can be universally adapted to different types of solenoid valves. The expenditure on circuit means is very low.
Die Erfindung wird nachstehend anhand der in der Zeichnung dargestellten Ausführungsform erläutert. Es zeigt Figur 1 ein Blockdiagramm der erfindungsgemäßen Einrichtung, Figur 2 verschiedene über der Zeit aufgetragenen Signale.The invention is described below with reference to the drawing illustrated embodiment explained. It shows a figure 1 Block diagram of the device according to the invention, FIG. 2 various signals plotted over time.
Bei dem beschriebenen Ausführungsbeispiel handelt es sich um eine Einrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers. Prinzipiell ist die beschriebene Vorrichtung und das beschriebene Verfahren im Zusammenhang mit jeglichen elektromagnetischen Verbrauchern einsetzbar. Sie ist nicht auf die spezielle Anwendung beschränkt. Besonders vorteilhaft ist es jedoch, die erfindungsgemäße Einrichtung und das erfindungsgmäße Verfahren im Zusammenhang mit Brennkraftmaschinen einzusetzen, insbesondere bei der Zumessung von Kraftstoff in einen Brennraum einer selbstzündenden Brennkraftmaschine. Zu diesem Zweck wird in besonders vorteilhafter Weise ein Magnetventil zur Steuerung der Zumessung von Kraftstoff in die Brennkraftmaschine verwendet.The exemplary embodiment described is a device for controlling an electromagnetic Consumer. In principle, the device described is and the described method in connection with any electromagnetic consumers can be used. she is not limited to the specific application. Particularly advantageous is, however, the device according to the invention and that Methods according to the invention in connection with internal combustion engines used, in particular when metering Fuel in a combustion chamber of a self-igniting internal combustion engine. For this purpose it is particularly advantageous Way a solenoid valve to control the metering of Fuel used in the internal combustion engine.
Hierbei ist es insbesondere bei kleinen Lasten erforderlich, daß kleinste Einspritzmengen möglichst exakt zugemessen werden. Hierzu ist es wiederum erforderlich, daß der Zeitpunkt, zu dem der Anker des bestromten Magnetventils seine Endlage erreicht, bekannt ist. Dieser Zeitpunkt wird üblicherweise mit Beginn of injection period (BIP) bezeichnet.Here it is particularly necessary for small loads that the smallest injection quantities are metered as precisely as possible. For this it is again necessary that the point in time to which the armature of the energized solenoid valve reaches its end position reached, is known. This time is usually designated with the beginning of injection period (BIP).
In Figur 1 sind schematisch wesentliche Elemente der Einrichtung
zur Steuerung einer magnetventilgesteuerten Kraftstoffzumeßeinrichtung
dargestellt. Ein elektromagnetischer
Verbraucher 100, ein Stromsteuermittel 110, und ein Strommeßmittel
120 sind in Reihe zwischen einer Versorgungsspannung
Ubat und Masse geschaltet.In Figure 1 are essential elements of the device schematically
for controlling a solenoid-controlled fuel metering device
shown. An electromagnetic one
Als Strommeßmittel 120 wird vorzugsweise ein ohmscher Widerstand
verwendet. Als Stromsteuermittel dient vorzugsweise ein
Transistor, insbesondere ein Feldeffekttransistor. Bei dem
Verbraucher 100 handelt es sich um einen induktiven
Widerstand, insbesondere eine Spule eines Magnetventils.An ohmic resistor is preferably used as the current measuring means 120
used. A is preferably used as the current control means
Transistor, in particular a field effect transistor. In which
Die beiden Anschlüsse des Strommeßmittels 120 sind mit einer
Stromerfassung 130 verbunden. Die Stromerfassung 130 beaufschlagt
einen Verknüpfungspunkt 135 mit dem Istwert IIst für
den Strom. Am zweiten Eingang des Verknüpfungspunktes 135
liegt ein Sollwert ISoll für den Strom an. Der Sollwert ISoll
wird von einer Steuerung 140 bereitgestellt.The two connections of the current measuring means 120 are connected to a
Mit dem Ausgangssignal des Verknüpfungspunktes 135 wird ein
Stromregler 150, insbesondere einen Analogregler, beaufschlagt.
Das Ausgangssignal UR, IR des Stromreglers 150 gelangt
über eine Stellgrößenerfassung 160 zum Steueranschluß
des Stromsteuermittels 110. Bei der Verwendung eines
Feldeffekttransistors handelt es sich bei dem Steueranschluß
um den Gate-Anschluß des Feldeffekttransistors.With the output signal of
Als Stellgrößenerfassung 160 wird vorzugsweise ein ohmscher
Widerstand verwendet, dessen beiden Anschlüsse mit einer BIP-Erfassung
170 in Kontakt stehen. Die BIP-Erfassung 170
beaufschlagt wiederum die Steuerung 140 mit einem Signal. Die
BIP-Erfassung 170 ist vorzugsweise als Komparator ausgebildet,
der den Spannungsabfall an dem Widerstand 160 auswertet.
Sobald die differenzierte Ausgangspannung UR kleiner
Null wird, erzeugt die BIP-Erfassung 170 ein Ausgangssignal.
Ausgehend von der differenzierten Regelausgangsspannung oder
der Fließrichtung des Regelerausgangsstroms erkennt die BIP-Erfassung
den Schaltzeitpunkt.An ohmic resistor, the two connections of which are in contact with a
Die Funktionsweise dieser Einrichtung wird im folgenden anhand
der in der Figur 2 dargestellten Signale beschrieben. In
der ersten Zeile ist ein Ansteuersignal UEin über der Zeit T
aufgetragen. Dieses Signal gibt an, ob die Steuereinheit 140
einen Sollwert ISoll an den Verknüpfungspunkt 135
weiterleitet.The mode of operation of this device is described below with reference to the signals shown in FIG. 2. A control signal U Ein is plotted over time T in the first line. This signal indicates whether the
In der zweiten Zeile ist der durch das Magnetventil fließende
Strom IMV aufgetragen. In der dritten Zeile ist die am
Ausgang des Reglers 150 anliegende Reglerspannung UR in der
vierten Zeile die differenzierte Reglerausgangsspannung bzw.
der Reglerausgangsstrom IR aufgetragen. In der letzten Zeile
ist das Ausgangssignal der BIP-Erfassung 170 UBIP aufgetragen. The current I MV flowing through the solenoid valve is plotted in the second line. In the third line, the regulator voltage U R present at the output of the
Bis zu dem Zeitpunkt t1 gibt die Steuereinrichtung 140 kein
Signal ab. Dies hat zur Folge, daß das Stromsteuermittel 110
den Stromfluß durch den Verbraucher 100 unterbricht, und das
Magnetventil nicht angesteuert wird. Ab dem Zeitpunkt t1 gibt
die Steuereinheit 140 einen Sollwert vor. Dies bedeutet, daß
das Ausgangssignal UEin einen erhöhten Wert annimmt. Da der
durch das Magnetventil fließende Strom seinen Sollwert noch
nicht erreicht hat, hat dies zur Folge, daß an dem Ausgang
des Verknüpfungspunktes 135 ein von 0 verschiedener Wert
anliegt. Daraufhin gibt der Regler 150 eine entsprechende
Stellgröße UR ab, die von 0 auf einen Wert ansteigt. Dies
bedeutet, daß das Gate des Stromsteuermittels mittels eines
Stromes aufgeladen wird. Der Strom IR steigt daher sehr
schnell an. Dies wiederum hat zur Folge, daß das
Stromsteuermittel 110 den Stromfluß IMV freigibt und der
Strom, IMV über der Zeit ansteigt.The
Nach kurzer Zeit erreicht die Stellgröße UR ihren maximalen
Wert und der Strom IR fällt ab. Zum Zeitpunkt t2 erreicht der
durch das Magnetventil fließende Strom IMV seinen Sollwert
ISoll. Dies hat zur Folge, daß sich die Ausgangsgröße UR des
Reglers 150 ändert. Sie nimmt einen kleineren Wert als bisher
an. Dies wiederum bewirkt, daß der Strom IR kurzfristig
negative Werte annimmt. Er ändert zum Zeitpunkt t2 sein
Vorzeichen. Dieser wiederum bewirkt, daß die BIP-Erfassung
170 zum Zeitpunkt t2 ein Signal abgibt, das einen Änderung
der Stromrichtung anzeigt.After a short time, the manipulated variable U R reaches its maximum value and the current I R drops. At time t2 , the current I MV flowing through the solenoid valve reaches its target value I target . As a result, the output variable U R of the
Im Zeitpunkt t3 erreicht der Anker des Magnetventils seine
neue Endlage. Dies wiederum bewirkt, daß sich die Induktivität
der Spule ändert. Die Änderung der Induktivität der Spule
bewirkt eine Diskontinuität des Ausgangssignals UR des
Reglers 150, das ein Vorzeichenwechsel bzw. eine Änderung des
Stroms IR zur Folge hat. Dieser Vorzeichenwechsel des Stroms
IR wiederum bewirkt, daß die BIP-Erfassung 170 zum Zeitpunkt
t3 ein Impulssignal an die Steuerung 140 abgibt.At time t3 , the armature of the solenoid valve reaches its new end position. This in turn causes the inductance of the coil to change. The change in the inductance of the coil causes a discontinuity in the output signal U R of the
Die Steuereinrichtung 140 erkennt den zweiten Impuls des
Signals UBIP als Schaltzeitpunkt des Magnetventils und wertet
dieses Signal entsprechend aus. Bei einer Ausgestaltung der
Erfindung ist vorgesehen, daß die BIP-Erfassung den ersten
Impuls zum Zeitpunkt t2 unterdrückt.The
Erfindungsgemäß ist vorgesehen, daß bei einem Magnetventil der Schaltzeitpunkt (BIP) durch Auswertung der Stellgröße eines Stromreglers gewonnen wird. Als Stromregler dient vorzugsweise ein Analogregler.According to the invention it is provided that in a solenoid valve the switching time (BIP) by evaluating the manipulated variable of a current regulator is obtained. Preferably serves as a current regulator an analog controller.
Alternativ kann auch vorgesehen sein, daß eine Spannungsregelung vorgesehen ist. In diesem Fall wird alternativ zum Strom, der durch den Verbraucher fließt, die am Verbraucher abfallende Spannung auf einen Sollwert eingeregelt. Die Auswertung der Stellgröße erfolgt entsprechend.Alternatively, it can also be provided that voltage regulation is provided. In this case, alternatively to Electricity that flows through the consumer, the consumer falling voltage adjusted to a setpoint. The evaluation the manipulated variable takes place accordingly.
Claims (4)
- Method for actuating an electromagnetic load (100), the load (100) being connected in series with a current control means (110), it being possible to apply a regulator output voltage to the current control means (110), it being possible for the regulator output voltage to be predefined by a regulating means (150) as a function of a comparison between an actual value and a setpoint value for the current which flows through the load, or the voltage which drops at the load, characterized in that, in order to determinate a switching time (BIP) of the electromagnetic load, it is possible to evaluate the differentiated regulator output voltage (UR) or the regulator output current (IR).
- Method according to Claim 1, characterized in that the switching time is detected if the differentiated regulator output voltage (UR) has a change of sign.
- Method according to Claim 1, characterized in that the switching time is detected if the direction of flow of the regulator output current (IR) changes.
- Device for actuating an electromagnetic load (100), in which the load (100) is connected in series with a current control means (110) and can have a regulator output voltage applied to it, a regulating means (150) predefining the regulator output voltage as a function of a comparison between an actual value and a setpoint value for the current which flows through the load or the voltage which drops at the load characterized in that means (170) are provided which, in order to determinate a switching time (BIP) of the electromagnetic load, evaluate the differentiated regulator output voltage (UR) or the regulator output current (IR).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4425987A DE4425987A1 (en) | 1994-07-22 | 1994-07-22 | Method and device for controlling an electromagnetic consumer |
| DE4425987 | 1994-07-22 | ||
| PCT/DE1995/000890 WO1996003758A1 (en) | 1994-07-22 | 1995-07-07 | Process and device for driving an electromagnetic consumer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0720770A1 EP0720770A1 (en) | 1996-07-10 |
| EP0720770B1 true EP0720770B1 (en) | 2002-05-08 |
Family
ID=6523877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95924843A Expired - Lifetime EP0720770B1 (en) | 1994-07-22 | 1995-07-07 | Process and device for driving an electromagnetic consumer |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0720770B1 (en) |
| JP (1) | JPH09503353A (en) |
| KR (1) | KR100378452B1 (en) |
| DE (2) | DE4425987A1 (en) |
| WO (1) | WO1996003758A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19728840A1 (en) | 1997-07-05 | 1999-01-07 | Bosch Gmbh Robert | Method and device for detecting a switching time of a solenoid valve |
| DE10129153A1 (en) * | 2001-06-16 | 2003-01-09 | Festo Ag & Co | Electromagnetic valve with holding current reduction has switching arrangement that changes to lower holding current depending on parameter variation when valve switched |
| DE10212092A1 (en) | 2002-03-19 | 2003-10-09 | Dbt Autom Gmbh | Method and device for operating an electromagnet on an intrinsically safe DC circuit |
| DE10252476B4 (en) * | 2002-11-12 | 2012-07-26 | Volkswagen Ag | Method for operating an internal combustion engine and internal combustion engine |
| NO319194B1 (en) | 2002-11-14 | 2005-06-27 | Pronova Biocare As | Lipase-catalyzed esterification process of marine oils |
| DE102008055008B4 (en) * | 2008-12-19 | 2018-08-09 | Robert Bosch Gmbh | Method for operating an internal combustion engine |
| DE102011005672B4 (en) | 2011-03-17 | 2019-07-11 | Continental Automotive Gmbh | Method, device and computer program for the electrical control of an actuator for determining the time of an anchor stop |
| DE102015204686A1 (en) | 2015-03-16 | 2016-09-22 | Robert Bosch Gmbh | Method for controlling fuel metering |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3426799A1 (en) * | 1984-07-20 | 1986-01-23 | Robert Bosch Gmbh, 7000 Stuttgart | DEVICE FOR CONTROLLING THE AMOUNT OF FUEL TO BE INJECTED INTO AN INTERNAL COMBUSTION ENGINE |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4612597A (en) * | 1984-12-19 | 1986-09-16 | General Motors Corporation | Circuit for controlling and indicating fuel injector operation |
| JP2623242B2 (en) * | 1987-01-16 | 1997-06-25 | 本田技研工業株式会社 | Current detector for electromagnetic actuator drive circuit |
| DE4308811B9 (en) * | 1992-07-21 | 2004-08-19 | Robert Bosch Gmbh | Method and device for controlling a solenoid-controlled fuel metering device |
| DE4237706C2 (en) * | 1992-11-07 | 1996-09-12 | Mtu Friedrichshafen Gmbh | Device for detecting the time of impact for the armature of a solenoid valve |
-
1994
- 1994-07-22 DE DE4425987A patent/DE4425987A1/en not_active Withdrawn
-
1995
- 1995-07-07 JP JP8505346A patent/JPH09503353A/en active Pending
- 1995-07-07 KR KR1019960700501A patent/KR100378452B1/en not_active Expired - Fee Related
- 1995-07-07 EP EP95924843A patent/EP0720770B1/en not_active Expired - Lifetime
- 1995-07-07 DE DE59510199T patent/DE59510199D1/en not_active Expired - Fee Related
- 1995-07-07 WO PCT/DE1995/000890 patent/WO1996003758A1/en not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3426799A1 (en) * | 1984-07-20 | 1986-01-23 | Robert Bosch Gmbh, 7000 Stuttgart | DEVICE FOR CONTROLLING THE AMOUNT OF FUEL TO BE INJECTED INTO AN INTERNAL COMBUSTION ENGINE |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1996003758A1 (en) | 1996-02-08 |
| KR100378452B1 (en) | 2003-07-22 |
| DE59510199D1 (en) | 2002-06-13 |
| EP0720770A1 (en) | 1996-07-10 |
| DE4425987A1 (en) | 1996-01-25 |
| KR960704148A (en) | 1996-08-31 |
| JPH09503353A (en) | 1997-03-31 |
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