EP1005051A2 - Method and device for driving an electromagnetic consumer - Google Patents
Method and device for driving an electromagnetic consumer Download PDFInfo
- Publication number
- EP1005051A2 EP1005051A2 EP99114827A EP99114827A EP1005051A2 EP 1005051 A2 EP1005051 A2 EP 1005051A2 EP 99114827 A EP99114827 A EP 99114827A EP 99114827 A EP99114827 A EP 99114827A EP 1005051 A2 EP1005051 A2 EP 1005051A2
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- Prior art keywords
- time window
- time
- current
- consumer
- window
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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
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- 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
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/32—Energising current supplied by semiconductor device
- H01H47/325—Energising current supplied by semiconductor device by switching regulator
Definitions
- the invention relates to a method and a device to control an electromagnetic consumer according to the preambles of the independent claims.
- a method and a device for controlling a electromagnetic consumers are from DE-OS 44 20 282 known.
- a device for Controlling a consumer described the comprises movable element. It is with the consumer a solenoid valve to control the Fuel metering in an internal combustion engine.
- a switching time is recognized when which the movable element reaches a certain position. This is done by evaluating the time course a size that is the current flowing through the consumer flows, corresponds.
- the voltage, to the consumer to a constant value is regulated or controlled.
- the invention is based, with one Method and a device for controlling a electromagnetic consumer of the type mentioned the duration of the time window within which the Switching time is detected to specify appropriately.
- the Time window should be large enough for the Switching time can be detected.
- that's supposed to Time window should be so small that it doesn't become one Current increase to impermissible values and thus to one The power stage is switched off.
- the time window within which the switching time is recorded is specified in such a way that on the one hand a detection of the switching time is possible and on the other hand the current is not too high Values increases.
- FIG. 1 shows a schematic illustration of the final stage
- FIG. 2 various signals plotted over time
- FIG. 3 a flowchart to illustrate the invention Method.
- the invention is illustrated below using the example of a Described by the consumer. It is with the consumer is in particular a solenoid valve for controlling the Fuel metering in an internal combustion engine.
- the Consumer includes a movable element that is at a Solenoid valve is usually referred to as a valve needle.
- the device according to the invention is based a block diagram.
- a consumer is 100 with a first connection with a supply voltage Ubat connected, the second port of consumer 100 stands with the first connection of a switching means 110 in Connection.
- the second connection of the switching means 110 is with the first connection of a current measuring means 120 in Connection.
- the second connection of the current measuring means is in contact with ground.
- the connections of the consumer 100 and the connections of the Current measuring means 120 act on a control unit 130 with signals, which in turn the switching means 110 with a Control signal A is applied.
- the consumer is 100, the switching means 110 and the current measuring means 120 in connected in series in this order. That order is chosen only as an example.
- the three elements can too be arranged in a different order. So it can Switching means also between the supply voltage and the Be arranged consumers.
- it can Current measuring means 120 between the switching means 110 and the Consumer 100 or between the consumer 100 and the Supply voltage can be arranged. Furthermore, it is possible that further switching means, especially a between the consumer 100 and the supply voltage, are provided.
- the switching means 110 is preferably a transistor, realized in particular as a field effect transistor.
- the Current measuring means 120 is preferably an ohmic resistor educated.
- the consumer 100 is preferably around the coil of a solenoid valve that for Metering of fuel is used.
- sub-figure 2a is the current I through the Consumer 100 flows, and preferably through that Current measuring means 120 is detected, plotted over time.
- FIG. 2a shows a metering or a Injection process shown. The starts at time t1 Control of consumer 100.
- the current I rises steeply.
- a first value S1 is reached. To this The switching means opens at this point in time. If the current drops by one determined value, the switching means 110 and the current rises again to the value S1.
- the value S1 is also referred to as starting current.
- the period between time t1 and time t2 is known as a free power-up. On this the regulation follows the starting current.
- a time window begins within which Switching means 110 are constantly in its closed Condition. As a result, the current increases.
- the moveable one Element its new end position due to the magnetic force. This has a change in the inductance of the consumer Episode. This causes a change in the current rise.
- the Time t4 ends the time window.
- a second value S2 for the Electricity regulated is also called the holding current designated.
- the control of the consumer ends at Time t5 at which the switching means 110 is opened and the current drops to 0 by time t6.
- the current flow is only shown schematically and can other types of solenoid valves or others Control procedures also accept other courses.
- the behavior while reaching the new one End position at time tBIP can be different. It is essential that at the switching time tBIP Current flow a kink and / or a discontinuity having. Usually this kink is caused by a Current evaluation recognized.
- the times t3 and t4 define a time window within which the switching time is recorded. It is provided that the switching means within the time window 110 is in its closed state. By Evaluation of the current curve within the time window the switching time tBIP is recognized. During the Time window defined by the times t3 and t4 is, the consumer 100 with the supply voltage Ubat charged and the temporal course of the current to Determination of the switching time evaluated. The fact that the Consumers in the time window with supply voltage is applied, the control is simplified in Time window essential, voltage regulation is not required.
- the limits for the time window t3 and t4 are preferably specified based on the switching time tBIP of the previous activation and the width B of the time window.
- the width B of the time window becomes, as in FIG. 3 described, specified.
- the time window i.e. the time interval between times t3 and t4 the current rise during the time window is limited. This takes place in particular when the internal combustion engine is started.
- sub-figure 2b is the time course of the duration of the Time window plotted with a solid line.
- the maximum value IB of the current I, which is just before the time t4 is detected is with a dashed line applied.
- the threshold value SW is one Double line applied. It is the conditions in the normal undisturbed operation.
- a minimum value BMIN for the duration of the time window i.e. specified at a distance between t3 and t4.
- the maximum value IB of the current is clearly below the threshold value SW. This has the consequence that the next injection a larger value is specified for the time window. This means the duration B of the time window increases over time several levels until a maximum value BMAX is reached.
- the value BMIN is chosen so that even with unfavorable ones Conditions the maximum current IB is not greater than that Threshold value is SW.
- the maximum value IB of the current also increases.
- the maximum but does not reach the threshold value SW.
- the threshold value SW is chosen so that it is slightly smaller than the maximum permissible current value at which the current monitoring appeals.
- FIG. 2b also shows that the threshold value SW is not constant, but depends on the Battery voltage Ubat, which is applied by the consumer is specified. As can be seen in FIG. 2b, this value increases slowly during the starting process.
- the procedure according to the invention is shown in FIG a flow chart explained.
- the Procedure according to the invention only once after the start performed the internal combustion engine. This means after at the start of the internal combustion engine, the program begins in Step 300.
- the value B for the Time window set to the minimum value BMIN.
- Which Subsequent query 320 checks whether the maximum value of the Current IB is greater than the threshold value SW. Is this not the case, i.e. is the maximum value IB of the current less than the threshold value SW, so in step 330 Time window B increased by the value X.
- the maximum value IB of the current corresponds to the current value that is present at time t4. Cannot measure this or difficult to detect, a current value can also be immediately before time t4 as the maximum value IB be used.
- the maximum value IB of the current corresponds the largest current value measured in the time window.
- the maximum value IB of the current I is preferred recorded immediately before the end of the time window (t4).
- the subsequent query 340 checks whether the width B of the time window is greater than the maximum value BMAX. Is if this is the case, the program ends in step 350.
- query 320 occurs again In normal operation, program steps 320, 330 and Go through 340 several times until the width B of the time window has reached the maximum value BMAX. If this ends the procedure.
- Query 320 recognizes that the maximum value IB of the current is greater than the threshold value SW, then in step 360 the width B of the window is reduced by the value Y.
- the subsequent query 370 checks whether the width B is less than or equal to the minimum value BMIN. Is this If this is not the case, query 320 is repeated. If this is the case the case, the width B is set to the step 380 Minimum value BMIN is set, and query 320 takes place again.
- the width of the window B is around decreases the value Y until the maximum value IB of the current is less than the threshold.
- the lower value did not fall below the BMIN becomes.
- the duration of the time window increases when the current is less than the threshold.
- the duration of the Time window is increased until a maximum value (BMAX) is reached for the duration.
- the duration of the Time window is reduced if the current is greater than is the threshold.
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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)
- Magnetically Actuated Valves (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electromagnets (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine 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 Verfahren und eine Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers sind aus der DE-OS 44 20 282 bekannt. Dort wird eine Vorrichtung zur Ansteuerung eines Verbrauchers beschrieben, der ein bewegliches Element umfaßt. Bei dem Verbraucher handelt es sich um ein Magnetventil zur Ansteuerung der Kraftstoffzumessung in eine Brennkraftmaschine. Innerhalb eines Zeitfensters wird ein Schaltzeitpunkt erkannt, bei dem das bewegliche Element eine bestimmte Lage erreicht. Dies erfolgt durch die Auswertung des zeitlichen Verlaufs einer Größe, die den Strom, der durch den Verbraucher fließt, entspricht. Während des Zeitfensters, in dem der Strom ausgewertet wird, ist vorgesehen, daß die Spannung, die an dem Verbraucher anliegt, auf einen konstanten Wert geregelt oder gesteuert wird. A method and a device for controlling a electromagnetic consumers are from DE-OS 44 20 282 known. There is a device for Controlling a consumer described the comprises movable element. It is with the consumer a solenoid valve to control the Fuel metering in an internal combustion engine. Within of a time window, a switching time is recognized when which the movable element reaches a certain position. This is done by evaluating the time course a size that is the current flowing through the consumer flows, corresponds. During the time window in which the Current is evaluated, it is provided that the voltage, to the consumer, to a constant value is regulated or controlled.
In der Kaltstartphase sind die Zuleitungen zu dem Verbraucher niederohmig, so daß die Ströme bei konstanter Spannung ein höheres Niveau erreichen, als im normalen Betrieb. Ist eine Stromüberwachung vorgesehen, die ab einem bestimmten Schwellenwert des Stromes die Endstufe abschaltet, so kann dies dazu führen, daß die Endstufe von der Stromüberwachung abgeschaltet wird.In the cold start phase, the supply lines to the Consumer low resistance, so that the currents at a constant Tension reach a higher level than in normal Business. If a current monitoring is provided, the one certain threshold value of the current the final stage switches off, this can lead to the final stage of the current monitoring is switched off.
Dies ist insbesondere dann problematisch, wenn während des Zeitfensters in dem die Schaltzeitpunkt erkannt wird, der Verbraucher mit der Versorgungsspannung verbunden ist. Abhängig von der Dauer des Zeitfensters steigt der Strom, der durch den Verbraucher fließt, auf unterschiedlich hohe Werte an.This is particularly problematic if during the Time window in which the switching time is recognized, the Consumer is connected to the supply voltage. Depending on the duration of the time window, the current increases, that flows through the consumer to different heights Values.
Der Erfindung liegt die Aufgabe zugrunde, bei einem Verfahren und einer Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers der eingangs genannten Art die Dauer des Zeitfensters, innerhalb dem die Schaltzeitpunkt erfaßt wird, geeignet vorzugeben. Das Zeitfenster soll ausreichend groß sein, damit der Schaltzeitpunkt erfaßt werden kann. Andererseits soll das Zeitfenster so klein sein, so daß es nicht zu einem Stromanstieg auf unzulässige Werte und damit zu einer Abschaltung der Endstufe kommt.The invention is based, with one Method and a device for controlling a electromagnetic consumer of the type mentioned the duration of the time window within which the Switching time is detected to specify appropriately. The Time window should be large enough for the Switching time can be detected. On the other hand, that's supposed to Time window should be so small that it doesn't become one Current increase to impermissible values and thus to one The power stage is switched off.
Durch die erfindungsgemäße Vorgehensweise werden Stromabschaltungen der Endstufe während der Erfassung des Schaltzeitpunkts vermieden. Das Zeitfenster, innerhalb dem der Schaltzeitpunkt erfaßt wird, wird derart vorgegeben, daß zum einen eine Erfassung des Schaltzeitpunkts möglich ist und zum anderen der Strom nicht auf unzulässig hohe Werte ansteigt.Through the procedure according to the invention Power cut-offs of the output stage during the acquisition of the Switching time avoided. The time window within which the switching time is recorded, is specified in such a way that on the one hand a detection of the switching time is possible and on the other hand the current is not too high Values increases.
Vorteilhafte und zweckmäßige Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous and expedient configurations and Further developments of the invention are in the subclaims featured.
Die Erfindung wird nachstehend anhand der in der Zeichnung dargestellten Ausführungsformen erläutert. Es zeigen Figur 1 eine schematische Darstellung der Endstufe, Figur 2 verschiedene über der Zeit aufgetragene Signale und Figur 3 ein Flußdiagramm zur Verdeutlichung der erfindungsgemäßen Vorgehensweise.The invention is described below with reference to the drawing illustrated embodiments explained. It shows figure 1 shows a schematic illustration of the final stage, FIG. 2 various signals plotted over time and FIG. 3 a flowchart to illustrate the invention Method.
Nachfolgend wird die Erfindung am Beispiel eines Verbrauchers beschrieben. Bei dem Verbraucher handelt es sich insbesondere um eine Magnetventil zur Steuerung der Kraftstoffzumessung in eine Brennkraftmaschine. Der Verbraucher umfaßt ein bewegliches Element, das bei einem Magnetventil üblicherweise als Ventilnadel bezeichnet ist.The invention is illustrated below using the example of a Described by the consumer. It is with the consumer is in particular a solenoid valve for controlling the Fuel metering in an internal combustion engine. The Consumer includes a movable element that is at a Solenoid valve is usually referred to as a valve needle.
In Figur 1 ist die erfindungsgemäße Vorrichtung anhand
eines Blockdiagrammes dargestellt. Ein Verbraucher 100 ist
mit einem ersten Anschluß mit einer Versorgungsspannung
Ubat verbunden, der zweite Anschluß des Verbrauchers 100
steht mit dem ersten Anschluß eines Schaltmittels 110 in
Verbindung. Der zweite Anschluß des Schaltmittels 110 steht
mit dem ersten Anschluß eines Strommeßmittels 120 in
Verbindung. Der zweite Anschluß des Strommeßmittels steht
mit Masse in Kontakt. In Figure 1, the device according to the invention is based
a block diagram. A consumer is 100
with a first connection with a supply voltage
Ubat connected, the second port of
Die Anschlüsse des Verbrauchers 100 und die Anschlüsse des
Strommeßmittels 120 beaufschlagen eine Steuereinheit 130
mit Signalen, die wiederum das Schaltmittel 110 mit einem
Ansteuersignal A beaufschlagt.The connections of the
In der dargestellten Ausführungsform ist der Verbraucher
100, das Schaltmittel 110 und das Strommeßmittel 120 in
dieser Reihenfolge in Reihe geschaltet. Diese Reihenfolge
ist nur beispielhaft gewählt. Die drei Elemente können auch
in anderer Reihenfolge angeordnet sein. So kann das
Schaltmittel auch zwischen der Versorgungsspannung und dem
Verbraucher angeordnet sein. Desweiteren kann das
Strommeßmittel 120 zwischen dem Schaltmittel 110 und dem
Verbraucher 100 bzw. zwischen dem Verbraucher 100 und der
Versorgungsspannung angeordnet sein. Desweiteren ist es
möglich, daß weitere Schaltmittel, insbesondere ein
zwischen dem Verbraucher 100 und der Versorgungsspannung,
vorgesehen sind.In the illustrated embodiment, the consumer is
100, the switching means 110 and the current measuring means 120 in
connected in series in this order. That order
is chosen only as an example. The three elements can too
be arranged in a different order. So it can
Switching means also between the supply voltage and the
Be arranged consumers. Furthermore, it can
Current measuring means 120 between the switching means 110 and the
Das Schaltmittel 110 ist vorzugsweise als Transistor,
insbesondere als Feldeffekttransistor, realisiert. Das
Strommeßmittel 120 ist vorzugsweise als ohmscher Widerstand
ausgebildet. Bei dem Verbraucher 100 handelt es sich
vorzugsweise um die Spule eines Magnetventils daß zur
Zumessung von Kraftstoff eingesetzt wird.The switching means 110 is preferably a transistor,
realized in particular as a field effect transistor. The
Current measuring means 120 is preferably an ohmic resistor
educated. The
In der Teilfigur 2a ist der Strom I, der durch den
Verbraucher 100 fließt, und vorzugsweise durch das
Strommeßmittel 120 erfaßt wird, über der Zeit aufgetragen.
In der Figur 2a ist eine Zumessung bzw. ein
Einspritzvorgang dargestellt. Zum Zeitpunkt t1 beginnt die
Ansteuerung des Verbrauchers 100.In sub-figure 2a is the current I through the
Zu diesem Zeitpunkt t1 steigt der Strom I steil an. Zum Zeitpunkt t2 wird ein erster Wert S1 erreicht. Zu diesem Zeitpunkt öffnet das Schaltmittel. Fällt der Strom um einen bestimmten Wert ab, so schließt das Schaltmittel 110 und der Strom steigt wieder auf den Wert S1 an. Der Wert S1 wird auch als Anzugsstrom bezeichnet.At this time t1, the current I rises steeply. To the At time t2, a first value S1 is reached. To this The switching means opens at this point in time. If the current drops by one determined value, the switching means 110 and the current rises again to the value S1. The value S1 is also referred to as starting current.
Der Zeitraum zwischen dem Zeitpunkt t1 und dem Zeitpunkt t2 wird als freier Stromhochlauf bezeichnet. An diesen schließt sich die Regelung auf den Anzugsstrom an.The period between time t1 and time t2 is known as a free power-up. On this the regulation follows the starting current.
Zum Zeitpunkt t3 beginnt ein Zeitfenster innerhalb dem das Schaltmittel 110 sich ständig in seinem geschlossenen Zustand befindet. Dies hat zur Folge, daß der Strom ansteigt. Zum Zeitpunkt tBIP erreicht das bewegliche Element aufgrund der Magnetkraft seine neue Endlage. Dies hat eine Änderung der Induktivität des Verbrauchers zur Folge. Dies bewirkt einen veränderten Stromanstieg. Zum Zeitpunkt t4 endet das Zeitfenster.At time t3, a time window begins within which Switching means 110 are constantly in its closed Condition. As a result, the current increases. At the time tBIP the moveable one Element its new end position due to the magnetic force. This has a change in the inductance of the consumer Episode. This causes a change in the current rise. To the Time t4 ends the time window.
Ab dem Zeitpunkt t4 wird auf einen zweiten Wert S2 für den Strom geregelt. Dieser Wert wird auch als Haltestrom bezeichnet. Die Ansteuerung des Verbrauchers endet zum Zeitpunkt t5, bei dem das Schaltmittel 110 geöffnet wird und der Strom bis zum Zeitpunkt t6 auf 0 abfällt.From time t4, a second value S2 for the Electricity regulated. This value is also called the holding current designated. The control of the consumer ends at Time t5 at which the switching means 110 is opened and the current drops to 0 by time t6.
Der Stromverlauf ist nur schematisch dargestellt und kann bei anderen Typen von Magnetventilen oder anderen Ansteuerverfahren auch andere Verläufe annehmen. Insbesondere das Verhalten während des Erreichens der neuen Endlage zum Zeitpunkt tBIP kann unterschiedlich sein. Wesentlich ist, daß zum Schaltzeitpunkt tBIP der Stromverlauf einen Knick und/oder eine Unstetigkeit aufweist. Üblicherweise wird dieser Knick durch eine Stromauswertung erkannt. The current flow is only shown schematically and can other types of solenoid valves or others Control procedures also accept other courses. In particular, the behavior while reaching the new one End position at time tBIP can be different. It is essential that at the switching time tBIP Current flow a kink and / or a discontinuity having. Usually this kink is caused by a Current evaluation recognized.
Problematisch ist nun, daß während des Zeitraumes t3 bis t4
das Schaltmittel 110 ständig geschlossen ist. Bei einem
kleinen ohmschen Widerstand des Verbrauchers 100 steigt der
Strom daher in diesem Zeitraum sehr stark an. Dies kann
dazu führen, daß ein höchstzulässiger Stromwert
überschritten wird, und die Endstufe abschaltet, d.h. das
Schaltmittel 110 dauerhaft geöffnet wird.The problem now is that during the period t3 to t4
the switching means 110 is constantly closed. At a
small ohmic resistance of the
Die Zeitpunkte t3 und t4 definieren ein Zeitfenster
innerhalb dem der Schaltzeitpunkt erfaßt wird. Dabei ist
vorgesehen, daß innerhalb dem Zeitfenster das Schaltmittel
110 sich in seinem geschlossenen Zustand befindet. Durch
Auswertung des Stromverlaufs innerhalb des Zeitfensters
wird der Schaltzeitpunkt tBIP erkannt. Während des
Zeitfensters, das durch die Zeitpunkte t3 und t4 definiert
ist, wird der Verbraucher 100 mit der Versorgungsspannung
Ubat beaufschlagt und der zeitliche Verlauf des Stroms zur
Ermittlung der Schaltzeit ausgewertet. Dadurch, daß der
Verbraucher im Zeitfenster mit Versorgungsspannung
beaufschlagt wird, vereinfacht sich die Ansteuerung im
Zeitfenster wesentlich, eine Spannungsregelung ist nicht
erforderlich.The times t3 and t4 define a time window
within which the switching time is recorded. It is
provided that the switching means within the
Die Grenzen für das Zeitfenster t3 und t4 werden
vorzugsweise ausgehend von dem Schaltzeitpunkt tBIP der
vorhergehenden Ansteuerung und der Breite B des
Zeitfensters vorgegeben. Dabei erfolgt die Berechnung
vorzugsweise gemäß der Formel.
Die Breite B des Zeitfensters wird dabei, wie in Figur 3 beschrieben, vorgegeben. The width B of the time window becomes, as in FIG. 3 described, specified.
Erfindungsgemäß wird durch eine Vorgabe des Zeitfensters d.h. des Zeitabstandes zwischen den Zeitpunkten t3 und t4 der Stromanstieg während des Zeitfensters begrenzt. Dies erfolgt insbesondere beim Start der Brennkraftmaschine.According to the invention, by specifying the time window i.e. the time interval between times t3 and t4 the current rise during the time window is limited. This takes place in particular when the internal combustion engine is started.
In Teilfigur 2b ist der zeitliche Verlauf der Dauer des Zeitfensters mit einer durchgezogenen Linie aufgetragen. Der Höchstwert IB des Stromes I, der kurz vor dem Zeitpunkt t4 erfaßt wird, ist mit einer gestrichelten Linie aufgetragen. Desweiteren ist der Schwellwert SW mit einer Doppellinie aufgetragen. Es sind die Verhältnisse im normalen ungestörten Betrieb dargestellt.In sub-figure 2b is the time course of the duration of the Time window plotted with a solid line. The maximum value IB of the current I, which is just before the time t4 is detected is with a dashed line applied. Furthermore, the threshold value SW is one Double line applied. It is the conditions in the normal undisturbed operation.
Zum Zeitpunkt 0 d.h. beim Start der Brennkraftmaschine wird
ein minimaler Wert BMIN für die Dauer des Zeitfensters d.h.
im Abstand zwischen t3 und t4 vorgegeben. Der Höchstwert IB
des Stromes liegt deutlich unterhalb des Schwellwertes SW.
Dies hat zur Folge, daß bei der nächsten Einspritzung ein
größerer Wert für das Zeitfenster vorgegeben wird. Dies
bedeutet, die Dauer B des Zeitfensters steigt über der Zeit
mehrere Stufen an, bis ein Maximalwert BMAX erreicht ist.
Der Wert BMIN ist so gewählt, daß auch bei ungünstigen
Bedingungen der Maximalstrom IB nicht größer als der
Schwellwert SW ist.At
Gleichzeitig mit dem Anstieg der Dauer B des Zeitfenster steigt auch der Höchstwert IB des Stroms an. Der Höchstwert erreicht aber nicht den Schwellwert SW. Der Schwellwert SW ist so gewählt, daß er geringfügig kleiner ist als der höchstzulässige Stromwert, bei dem die Stromüberwachung anspricht.Simultaneously with the increase in duration B of the time window the maximum value IB of the current also increases. The maximum but does not reach the threshold value SW. The threshold value SW is chosen so that it is slightly smaller than the maximum permissible current value at which the current monitoring appeals.
Der Figur 2b ist ferner zu entnehmen, daß der Schwellwert SW nicht konstant ist, sondern abhängig von der Batteriespannung Ubat, mit dem der Verbraucher beaufschlagt wird, vorgegeben wird. Wie in der Figur 2b zu erkennen ist, steigt dieser Wert während des Startvorganges langsam an.FIG. 2b also shows that the threshold value SW is not constant, but depends on the Battery voltage Ubat, which is applied by the consumer is specified. As can be seen in FIG. 2b, this value increases slowly during the starting process.
In Figur 3 ist die erfindungsgemäße Vorgehensweise anhand
eines Flußdiagrammes erläutert. Vorzugsweise wird die
erfindungsgemäße Vorgehensweise nur einmal nach dem Start
der Brennkraftmaschine durchgeführt. Dies bedeutet, nach
dem Start der Brennkraftmaschine beginnt das Programm in
Schritt 300.The procedure according to the invention is shown in FIG
a flow chart explained. Preferably the
Procedure according to the invention only once after the start
performed the internal combustion engine. This means after
at the start of the internal combustion engine, the program begins in
Im sich anschließenden Schritt 310 wird der Wert B für das
Zeitfenster auf den Minimalwert BMIN gesetzt. Die sich
anschließende Abfrage 320 überprüft, ob der Höchstwert des
Stromes IB größer als der Schwellwert SW ist. Ist dies
nicht der Fall, d.h. der Höchstwert IB des Stromes ist
kleiner als der Schwellwert SW, so wird im Schritt 330 das
Zeitfenster B um den Wert X vergrößert.In the
Der Höchstwert IB des Stromes entspricht dem Stromwert, der zum Zeitpunkt t4 vorliegt. Kann dieser meßtechnisch nicht oder nur schwer erfaßt werden, so kann auch ein Stromwert unmittelbar vor der Zeitpunkt t4 als Höchstwert IB verwendet werden. Der Höchstwert IB des Stroms entspricht dem größten Stromwert, der im Zeitfenster gemessen wird. Der Höchstwert IB des Stromes I wird vorzugsweise unmittelbar vor dem Ende des Zeitfensters (t4) erfaßt.The maximum value IB of the current corresponds to the current value that is present at time t4. Cannot measure this or difficult to detect, a current value can also be immediately before time t4 as the maximum value IB be used. The maximum value IB of the current corresponds the largest current value measured in the time window. The maximum value IB of the current I is preferred recorded immediately before the end of the time window (t4).
Die sich anschließende Abfrage 340 überprüft, ob die Breite
B des Zeitfensters größer als der Maximalwert BMAX ist. Ist
dies der Fall, so endet das Programm in Schritt 350.The
Ist dies nicht der Fall, erfolgt erneut die Abfrage 320. Im
normalen Betrieb werden die Programmschritte 320, 330 und
340 mehrmals durchlaufen, bis die Breite B des Zeitfensters
den Maximalwert BMAX erreicht hat. Ist dies der Fall endet
das Verfahren.If this is not the case,
Erkennt die Abfrage 320, daß der Höchstwert IB des Stromes
größer als der Schwellwert SW ist, so wird in Schritt 360
die Breite B des Fensters um den Wert Y verringert. Die
anschließende Abfrage 370 überprüft, ob die Breite B
kleiner oder gleich als der Minimalwert BMIN ist. Ist dies
nicht der Fall, so erfolgt erneut die Abfrage 320. Ist dies
der Fall, so wird unter Schritt 380 die Breite B auf den
Minimalwert BMIN gesetzt, und die Abfrage 320 erfolgt
erneut.
Dies bedeutet, ist der Höchstwert des Stromes IB größer als der Schwellwert SW, so wird die Breite des Fensters B um den Wert Y verringert, bis der Höchstwert IB des Stromes kleiner als der Schwellwert ist. Vorzugsweise ist vorgesehen, daß der untere Wert BMIN nicht unterschritten wird.This means the maximum value of the current IB is greater than the threshold SW, the width of the window B is around decreases the value Y until the maximum value IB of the current is less than the threshold. Preferably provided that the lower value did not fall below the BMIN becomes.
Erfindungsgemäß wird ausgehend von einem Startwert (BMIN) die Zeitdauer des Zeitfensters vergrößert, wenn der Strom kleiner als der Schwellwert ist. Die Zeitdauer des Zeitfensters wird vergrößert, bis ein Maximalwert (BMAX) für die Zeitdauer erreicht ist. Die Zeitdauer des Zeitfensters wird verkleinert, wenn der Strom größer als der Schwellwert ist.According to the invention, starting from a starting value (BMIN) the duration of the time window increases when the current is less than the threshold. The duration of the Time window is increased until a maximum value (BMAX) is reached for the duration. The duration of the Time window is reduced if the current is greater than is the threshold.
Claims (7)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19854305 | 1998-11-25 | ||
| DE19854305A DE19854305A1 (en) | 1998-11-25 | 1998-11-25 | Method and device for controlling an electromagnetic consumer |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1005051A2 true EP1005051A2 (en) | 2000-05-31 |
| EP1005051A3 EP1005051A3 (en) | 2002-03-20 |
| EP1005051B1 EP1005051B1 (en) | 2007-03-07 |
Family
ID=7888919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99114827A Expired - Lifetime EP1005051B1 (en) | 1998-11-25 | 1999-07-29 | Method for driving an electromagnetic consumer |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20010048087A1 (en) |
| EP (1) | EP1005051B1 (en) |
| JP (1) | JP2000164425A (en) |
| DE (2) | DE19854305A1 (en) |
| ES (1) | ES2281153T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012123445A1 (en) * | 2011-03-17 | 2012-09-20 | Continental Automotive Gmbh | Modified electrical actuation of an actuator for determining the time at which an armature stops |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005033151A1 (en) * | 2005-07-13 | 2007-01-18 | Robert Bosch Gmbh | Device for controlling an electromagnetic actuator and method for testing a first inductance of an electromagnetic actuator |
| DE102006044080B4 (en) | 2006-09-20 | 2023-10-12 | Robert Bosch Gmbh | Method for operating a reagent metering valve and device for carrying out the method |
| JP5233967B2 (en) * | 2009-11-20 | 2013-07-10 | オムロンヘルスケア株式会社 | Blood pressure measurement device |
| CN101806255B (en) * | 2010-03-19 | 2013-01-02 | 清华大学 | Method and system for driving electromagnetic valve of diesel engine |
| DE102011004309A1 (en) | 2011-02-17 | 2012-08-23 | Robert Bosch Gmbh | Method for determining switching time of solenoid valve in e.g. common-rail fuel injection system of internal combustion engine, involves determining fixed coil current value and/or coil voltage value, based on sampling process |
| CN109058574B (en) * | 2018-08-30 | 2020-10-27 | 宁波奕力电磁技术有限公司 | Control method of low-power-consumption electromagnetic valve with position state monitoring function |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4823825A (en) * | 1985-04-25 | 1989-04-25 | Buechl Josef | Method of operating an electromagnetically actuated fuel intake or exhaust valve of an internal combustion engine |
| DE4420282A1 (en) * | 1994-06-10 | 1995-12-14 | Bosch Gmbh Robert | Method and device for controlling an electromagnetic consumer |
-
1998
- 1998-11-25 DE DE19854305A patent/DE19854305A1/en not_active Withdrawn
-
1999
- 1999-07-29 DE DE59914240T patent/DE59914240D1/en not_active Expired - Fee Related
- 1999-07-29 ES ES99114827T patent/ES2281153T3/en not_active Expired - Lifetime
- 1999-07-29 EP EP99114827A patent/EP1005051B1/en not_active Expired - Lifetime
- 1999-11-02 US US09/432,338 patent/US20010048087A1/en not_active Abandoned
- 1999-11-24 JP JP11333290A patent/JP2000164425A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4823825A (en) * | 1985-04-25 | 1989-04-25 | Buechl Josef | Method of operating an electromagnetically actuated fuel intake or exhaust valve of an internal combustion engine |
| DE4420282A1 (en) * | 1994-06-10 | 1995-12-14 | Bosch Gmbh Robert | Method and device for controlling an electromagnetic consumer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012123445A1 (en) * | 2011-03-17 | 2012-09-20 | Continental Automotive Gmbh | Modified electrical actuation of an actuator for determining the time at which an armature stops |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19854305A1 (en) | 2000-05-31 |
| US20010048087A1 (en) | 2001-12-06 |
| EP1005051A3 (en) | 2002-03-20 |
| JP2000164425A (en) | 2000-06-16 |
| DE59914240D1 (en) | 2007-04-19 |
| EP1005051B1 (en) | 2007-03-07 |
| ES2281153T3 (en) | 2007-09-16 |
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