EP1396625A2 - Method and device for controlling an injector - Google Patents

Method and device for controlling an injector Download PDF

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Publication number
EP1396625A2
EP1396625A2 EP03015277A EP03015277A EP1396625A2 EP 1396625 A2 EP1396625 A2 EP 1396625A2 EP 03015277 A EP03015277 A EP 03015277A EP 03015277 A EP03015277 A EP 03015277A EP 1396625 A2 EP1396625 A2 EP 1396625A2
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EP
European Patent Office
Prior art keywords
temperature
injector
variable
actuator
heat transfer
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Granted
Application number
EP03015277A
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German (de)
French (fr)
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EP1396625B1 (en
EP1396625A3 (en
Inventor
Johannes-Joerg Rueger
Andreas Huber
Udo Schulz
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP1396625A3 publication Critical patent/EP1396625A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
    • 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
    • F02D2041/2065—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control being related to the coil temperature

Definitions

  • the invention relates to a method and a device for controlling an injector.
  • the electrical energy that is supplied to the injector is preferred determined on the basis of first operating parameters (AN, U, N). These first Operating parameters are preferably the number of controls AN per Unit of time, the speed N and / or the actuator voltage U. In addition to individual or Several of these sizes can be used with other sizes.
  • the heat transfer factor is based on second operating parameters (P) determined.
  • P second operating parameters
  • Figures 1 and 2 each show a block diagram of an inventive Embodiment.
  • Piezo injectors usually have a hydraulic coupler to to decouple the actuator and the actual control valve from each other. So that will ensures that the different thermal behavior of the two elements does not affect the opening behavior of the control valve.
  • Actuator pressure is built up in the coupler to position the control valve. about Leakage gaps become part of the fuel in the coupler pushed out.
  • Such piezo actuators have, depending on the choice of those used Piezoceramic, a temperature-dependent lifting capacity. As a result of the changed Lifting capacity, the control voltage of the actuator is tracked. This means at when controlling the actuator, the temperature of the actuator must be taken into account. The determination of the temperature is problematic since it is usually not immediate is measurable on the actuator or only with considerable technical effort Measurement is possible.
  • the power loss QZ corresponds to the actuator energy supplied by energy losses.
  • FIG. 1 shows a first embodiment of the procedure according to the invention shown.
  • a first map 100 is dependent on different ones Input variables that store the thermal energy QZ supplied to the actuator.
  • the heat transfer factor KW is dependent on various Operating parameters filed. These two sizes come together
  • Junction 115 the output signal DT of the temperature difference between corresponds to the output of the piezo actuator and the piezo actuator.
  • This signal arrives at the node 120, at the second input, the output signal of a third map 130 is present.
  • the output signal of the third map 130 corresponds the fuel temperature TD. Linking the two temperature values results in the temperature of the actuator TA.
  • This signal comes from node 120 to a controller 140, which processes this signal TA further.
  • variables are supplied to the first characteristic diagram 100 as input variables, that influence the energy input into the actuator per unit of time.
  • This size corresponds the energy losses.
  • the essential variable is preferably additionally or alternatively the voltage U, which is at Actuator applied, used.
  • the number of Cylinder, the rail pressure and / or the number of partial injections the first map are fed.
  • the first map 100 shows the Heat QZ, which is fed to the actuator, stored. This is in essential to the product of the energy loss for a control and the number of Controls per time.
  • the heat transfer factor is usually dependent on the second map 110 stored by the rail pressure P and a constant K.
  • the constant K takes into account Essentially the geometry and material parameters that determine the heat transfer between determine the actuator module and the fuel.
  • the rail pressure P influences the Flow rate of the fuel, which in turn increases heat transfer affected.
  • the third characteristic diagram 130 essentially contains a correction model for the Fuel temperature, which the fuel temperature TK and the speed supplied become. Furthermore, other sizes, such as the Ambient temperature and / or the driving speed are taken into account.
  • the Actual map or this correction model is provided when the fuel temperature TD not measured directly, but based on other temperature values, such as For example, the fuel temperature in the rail is determined.
  • the corresponding sizes can also be used can be determined in a different way on the basis of the input variables.
  • the quantities that are supplied to the first, the second and the third characteristic map can be detected directly by means of sensors or are located in the control unit 140 to control the internal combustion engine.
  • FIG. 2 shows a further embodiment of the procedure according to the invention shown. This is a simplified embodiment in which the heat transfer factor KW is a constant value and for the temperature TD A measured value is used.
  • the thermal energy QZ results from Multiplication of the number of controls per unit of time with the loss of energy per Control, which is preferably specified as a function of the control voltage U.
  • the first characteristic map 100 essentially occurs Node 200, on the one hand, the number of actuations per time and the output signal is fed to a characteristic curve 210.
  • the characteristic curve 210 determines the Loss energy per control based on at least the actuator voltage U.
  • Des the second characteristic map 110 is furthermore a read-only memory 220 and the third Map 130 replaced by a sensor 230 that immediately provides a signal that the temperature at the output of the actuator is determined.
  • So block 110 can optionally be changed by read-only memory 220, correction module 130 by the sensor 230 and / or the first map 100 by the blocks 200 and 210 be replaced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

A measure of electrical energy (QZ) supplied to the injector, a heat transfer factor (KW) and a measure of the fuel temperature (TD) are employed to calculate a measure of the injector temperature (TA). An Independent claim is included for corresponding control equipment.

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Steuerung eines Injektors.The invention relates to a method and a device for controlling an injector.

Aus der nicht vorveröffentlichten EP 11 38 914 ist ein Verfahren zur Steuerung eines Injektors bekannt, bei dem die Temperatur berücksichtigt wird. Dabei wird die Temperatur des Aktors ausgehend von der elektrischen und der thermischen Energiebilanz ermittelt. Die Erfassung der hierfür notwendigen Größen ist sehr aufwendig und kostspielig.From the unpublished EP 11 38 914 is a method for controlling a Injector known, in which the temperature is taken into account. The Temperature of the actuator based on the electrical and thermal Energy balance determined. The acquisition of the sizes required for this is very complex and costly.

Vorteile der ErfindungAdvantages of the invention

Dadurch, dass die Temperatur des Aktors ausgehend von der elektrischen Energie, die dem Injektor zugeführt wird, einem Wärmeübergangsfaktor und der Kraftstofftemperatur ermittelt wird, ist eine recht einfache und zuverlässige Ermittlung der Aktortemperatur möglicht. Als elektrische Energie wird dabei die Energie bezeichnet die der Differenz zwischen der beim Laden zugeführten und beim Entladen abgeführten Energie, wobei diese Differenz um die mechanische Energie vermindert wird, die der Injektor benötigt.The fact that the temperature of the actuator based on the electrical energy is fed to the injector, a heat transfer factor and the fuel temperature is determined is a very simple and reliable determination of the actuator temperature made possible. Electrical energy is the energy of difference between the energy supplied during charging and discharged during discharging, where this difference is reduced by the mechanical energy that the injector requires.

Besonders vorteilhaft ist es, wenn die obigen Größen aus anderen Größen, die in der Steuereinheit vorliegen bzw. für andere Steueraufgaben benötigt werden zur Ermittlung der elektrischen Energie, des Wärmeübergangsfaktors und/oder der Kraftstofftemperatur verwendet werden. It when the above sizes from other sizes in the Control unit are available or are required for other control tasks for the determination the electrical energy, the heat transfer factor and / or the fuel temperature be used.

Vorzugsweise wird dabei die elektrische Energie, die dem Injektor zugeführt wird ausgehend von ersten Betriebsparametern (AN, U, N) ermittelt. Diese ersten Betriebskenngrößen sind vorzugsweise die Anzahl der Ansteuerungen AN pro Zeiteinheit, die Drehzahl N und/oder die Aktorspannung U. Neben einzelnen oder mehreren dieser Größen können auch noch weitere Größen verwendet werden.The electrical energy that is supplied to the injector is preferred determined on the basis of first operating parameters (AN, U, N). These first Operating parameters are preferably the number of controls AN per Unit of time, the speed N and / or the actuator voltage U. In addition to individual or Several of these sizes can be used with other sizes.

Der Wärmeübergangsfaktor wird ausgehend von zweiten Betriebsparametern (P) ermittelt. Vorzugsweise wird der Raildruck oder der Raildruck und weitere Größen verwendet.The heat transfer factor is based on second operating parameters (P) determined. The rail pressure or the rail pressure and other sizes are preferred used.

Zeichnungdrawing

Die Erfindung wird nachstehend anhand der in der Zeichnung dargestellten Ausführungsformen erläutert.The invention is described below with reference to the drawing Embodiments explained.

Die Figuren 1 und 2 zeigen jeweils ein Blockdiagramm einer erfindungsgemäßen Ausführungsform.Figures 1 and 2 each show a block diagram of an inventive Embodiment.

Im Folgenden wird die erfindungsgemäße Vorgehensweise anhand eines Piezoinjektors beschrieben. Piezoinjektoren weisen üblicher Weise einen hydraulischen Koppler auf, um den Aktor und das eigentliche Steuerventil voneinander zu entkoppeln. Damit wird gewährleistet, dass sich das unterschiedliche thermische Verhalten der beiden Elemente nicht auf das Öffnungsverhalten des Steuerventils auswirkt. Bei der Ansteuerung des Aktors wird Druck im Koppler aufgebaut, um das Steuerventil zu positionieren. Über Leckspalte wird dabei ein Teil des im Koppler befindlichen Kraftstoffs aus diesem herausgedrückt. Solche Piezoaktoren weisen, je nach Wahl der verwendeten Piezokeramik, ein temperaturabhängiges Hubvermögen auf. Als Folge des geänderten Hubvermögens wird die Ansteuerspannung des Aktors nachgeführt. Dies bedeutet, bei der Ansteuerung des Aktors ist die Temperatur des Aktors zu berücksichtigen. Problematisch ist die Ermittlung der Temperatur, da diese in der Regel nicht unmittelbar am Aktor messbar ist bzw. nur mit einem erheblichen technischen Aufwand eine Messung möglich ist.The procedure according to the invention is described below using a piezo injector described. Piezo injectors usually have a hydraulic coupler to to decouple the actuator and the actual control valve from each other. So that will ensures that the different thermal behavior of the two elements does not affect the opening behavior of the control valve. When controlling the Actuator pressure is built up in the coupler to position the control valve. about Leakage gaps become part of the fuel in the coupler pushed out. Such piezo actuators have, depending on the choice of those used Piezoceramic, a temperature-dependent lifting capacity. As a result of the changed Lifting capacity, the control voltage of the actuator is tracked. This means at when controlling the actuator, the temperature of the actuator must be taken into account. The determination of the temperature is problematic since it is usually not immediate is measurable on the actuator or only with considerable technical effort Measurement is possible.

Erfindungsgemäß wurde erkannt, dass es einen linearen Zusammenhang zwischen der Verlustleistung QZ des Piezoaktors und der Temperaturdifferenz zwischen der Aktortemperatur TA und der Kraftstofftemperatur TD am Leckageanschluss des Injektors besteht. Im Umkehrschluss kann aus der Verlustleistung QZ, sowie der Temperatur TD des Kraftstoffrückflusses im Bereich des umströmten Aktormoduls des Rails auf die Aktortemperatur TA berechnet werden. Hierbei gilt die folgende Beziehung: TA = QZ/KW + TD According to the invention, it was recognized that there is a linear relationship between the power loss QZ of the piezo actuator and the temperature difference between the actuator temperature TA and the fuel temperature TD at the leakage connection of the injector. Conversely, the power loss QZ and the temperature TD of the fuel return flow in the area of the flow around the actuator module of the rail can be used to calculate the actuator temperature TA. The following relationship applies here: TA = QZ / KW + TD

Die Verlustleistung QZ entspricht dem Aktor durch Energieverluste zugeführte Energie.The power loss QZ corresponds to the actuator energy supplied by energy losses.

In Figur 1 ist eine erste Ausführungsform der erfindungsgemäßen Vorgehensweise dargestellt. In einem ersten Kennfeld 100 ist abhängig von verschiedenen Eingangsgrößen, die dem Aktor zugeführte Wärmeenergie QZ abgelegt. In einem zweiten Kennfeld 110 ist der Wärmeübergangsfaktor KW abhängig von verschiedenen Betriebskenngrößen abgelegt. Diese beiden Größen gelangen zu einem Verknüpfungspunkt 115, dessen Ausgangssignal DT der Temperaturdifferenz zwischen dem Ausgang des Piezoaktors und dem Piezoaktor entspricht. Dieses Signal gelangt zu dem Verknüpfungspunkt 120, an dessen zweiten Eingang das Ausgangssignal eines dritten Kennfeldes 130 anliegt. Das Ausgangssignal des dritten Kennfeldes 130 entspricht der Kraftstofftemperatur TD. Durch Verknüpfen der beiden Temperaturwerte ergibt sich die Temperatur des Aktors TA. Dieses Signal gelangt von dem Verknüpfungspunkt 120 zu einer Steuerung 140, die dieses Signal TA weiter verarbeitet.1 shows a first embodiment of the procedure according to the invention shown. In a first map 100 is dependent on different ones Input variables that store the thermal energy QZ supplied to the actuator. In a second Map 110, the heat transfer factor KW is dependent on various Operating parameters filed. These two sizes come together Junction 115, the output signal DT of the temperature difference between corresponds to the output of the piezo actuator and the piezo actuator. This signal arrives at the node 120, at the second input, the output signal of a third map 130 is present. The output signal of the third map 130 corresponds the fuel temperature TD. Linking the two temperature values results in the temperature of the actuator TA. This signal comes from node 120 to a controller 140, which processes this signal TA further.

Als Eingangsgrößen werden dem ersten Kennfeld 100 insbesondere Größen zugeführt, die den Energieeintrag in den Aktor pro Zeiteinheit beeinflussen. Diese Größe entspricht den Energieverlusten. Als solche Größe wird u.a. die Drehzahl verwendet. Als weitere wesentliche Größe wird vorzugsweise zusätzlich oder alternativ die Spannung U, die am Aktor anliegt, verwendet. Neben diesen Größen können ergänzend die Anzahl der Zylinder, der Raildruck und/oder die Anzahl der Teileinspritzungen dem ersten Kennfeld zugeführt werden. Ausgehend von diesen Größen ist in dem ersten Kennfeld 100 die Wärme QZ, die dem Aktor zugeführt wird, abgelegt. Hierbei handelt es sich im wesentlichen um das Produkt der Verlustenergie für eine Ansteuerung und der Anzahl der Ansteuerungen pro Zeit. Bei der Ermittlung der Verlustenergie wird üblicherweise die Differenz zwischen der beim Ladevorgang zugeführten Energie und der beim Entladevorgang abgeführten Energie korrigiert, um den mechanischen Energiebedarf pro Ansteuerung, bestimmt. In particular, variables are supplied to the first characteristic diagram 100 as input variables, that influence the energy input into the actuator per unit of time. This size corresponds the energy losses. As such size, among other things the speed used. As another The essential variable is preferably additionally or alternatively the voltage U, which is at Actuator applied, used. In addition to these sizes, the number of Cylinder, the rail pressure and / or the number of partial injections the first map are fed. Based on these variables, the first map 100 shows the Heat QZ, which is fed to the actuator, stored. This is in essential to the product of the energy loss for a control and the number of Controls per time. When determining the energy loss, the Difference between the energy supplied during charging and that during Discharged energy corrected to the mechanical energy requirements per Control, determined.

Der Wärmeübergangsfaktor ist in dem zweiten Kennfeld 110 üblicherweise abhängig vom Raildruck P und einer Konstanten K abgelegt. Die Konstante K berücksichtigt im Wesentlichen die Geometrie und Materialkenngrößen, die den Wärmeübergang zwischen dem Aktormodul und dem Kraftstoff bestimmen. Der Raildruck P beeinflusst die Strömungsgeschwindigkeit des Kraftstoffes, die wiederum den Wärmeübergang beeinflusst.The heat transfer factor is usually dependent on the second map 110 stored by the rail pressure P and a constant K. The constant K takes into account Essentially the geometry and material parameters that determine the heat transfer between determine the actuator module and the fuel. The rail pressure P influences the Flow rate of the fuel, which in turn increases heat transfer affected.

Das dritte Kennfeld 130 beinhaltet im Wesentlichen ein Korrekturmodell für die Kraftstofftemperatur, dem die Kraftstofftemperatur TK und die Drehzahl zugeführt werden. Des weiteren können noch andere Größen, wie beispielsweise die Umgebungstemperatur und/oder die Fahrgeschwindigkeit berücksichtigt werden. Das Istkennfeld bzw. dieses Korrekturmodell ist vorgesehen, wenn die Kraftstofftemperatur TD nicht unmittelbar gemessen, sondern ausgehend von anderen Temperaturwerten, wie beispielsweise der Kraftstofftemperatur im Rail ermittelt wird.The third characteristic diagram 130 essentially contains a correction model for the Fuel temperature, which the fuel temperature TK and the speed supplied become. Furthermore, other sizes, such as the Ambient temperature and / or the driving speed are taken into account. The Actual map or this correction model is provided when the fuel temperature TD not measured directly, but based on other temperature values, such as For example, the fuel temperature in the rail is determined.

Alternativ zu den Kennfeldem 100, 110 und 130 können die entsprechenden Größen auch in anderer Weise ausgehend von den Eingangsgrößen bestimmt werden.As an alternative to the characteristic diagrams 100, 110 and 130, the corresponding sizes can also be used can be determined in a different way on the basis of the input variables.

Durch Quotientenbildung im Verknüpfungspunkt 115 ergibt sich ausgehend von der Wärme, die dem Injektor zugeführt wird, und dem Wärmeübergangsfaktor KW die Temperaturdifferenz zwischen der Aktortemperatur und der Kraftstofftemperatur. Durch Verknüpfung in dem Verknüpfungspunkt 120 ergibt sich hieraus die tatsächliche Aktortemperatur TA. Diese wird dann von der Steuerung 140 bei der Ansteuerung der Aktoren berücksichtigt.The formation of a quotient in node 115 results from the Heat that is fed to the injector and the heat transfer factor KW die Temperature difference between the actuator temperature and the fuel temperature. By Link in node 120 results from this the actual Actuator temperature TA. This is then used by the controller 140 when the Actuators considered.

Die Größen, die dem ersten, dem zweiten und dem dritten Kennfeld zugeführt werden, können zum einen mittels Sensoren direkt erfasst werden bzw. liegen in der Steuereinheit 140 zur Steuerung der Brennkraftmaschine vor.The quantities that are supplied to the first, the second and the third characteristic map can be detected directly by means of sensors or are located in the control unit 140 to control the internal combustion engine.

In Figur 2 ist eine weitere Ausgestaltung der erfindungsgemäßen Vorgehensweise dargestellt. Hierbei handelt es sich um eine vereinfachte Ausführungsform, bei der für den Wärmeübergangsfaktor KW ein konstanter Wert und für die Temperatur TD des Kraftstoffes ein Messwert verwendet wird. Die Wärmeenergie QZ ergibt sich durch Multiplikation der Anzahl der Ansteuerungen pro Zeiteinheit mit der Verlustenergie pro Ansteuerung, die vorzugsweise abhängig von der Ansteuerspannung U vorgegeben wird.FIG. 2 shows a further embodiment of the procedure according to the invention shown. This is a simplified embodiment in which the heat transfer factor KW is a constant value and for the temperature TD A measured value is used. The thermal energy QZ results from Multiplication of the number of controls per unit of time with the loss of energy per Control, which is preferably specified as a function of the control voltage U.

Bereits in Figur 1 beschriebene Elemente sind mit entsprechenden Bezugszeichen bezeichnet. An Stelle des ersten Kennfeldes 100 tritt im Wesentlichen ein Verknüpfungspunkt 200, dem zum einen die Anzahl AN der Ansteuerungen pro Zeit und das Ausgangssignal einer Kennlinie 210 zugeführt wird. Die Kennlinie 210 ermittelt die Verlustenergie pro Ansteuerung ausgehend von wenigstens der Aktorspannung U. Des weiteren ist das zweite Kennfeld 110 durch einen Festwertspeicher 220 und das dritte Kennfeld 130 durch einen Sensor 230 ersetzt, der unmittelbar ein Signal bereit stellt, das die Temperatur am Ausgang des Aktors ermittelt.Elements already described in FIG. 1 have the same reference numerals designated. The first characteristic map 100 essentially occurs Node 200, on the one hand, the number of actuations per time and the output signal is fed to a characteristic curve 210. The characteristic curve 210 determines the Loss energy per control based on at least the actuator voltage U. Des the second characteristic map 110 is furthermore a read-only memory 220 and the third Map 130 replaced by a sensor 230 that immediately provides a signal that the temperature at the output of the actuator is determined.

Diese beiden Ausführungsformen können beliebig miteinander kombiniert werden. So kann wahlweise der Block 110 durch den Festwertspeicher 220, das Korrekturmodul 130 durch den Sensor 230 und/oder das erste Kennfeld 100 durch die Blöcke 200 und 210 ersetzt werden.These two embodiments can be combined with one another as desired. So block 110 can optionally be changed by read-only memory 220, correction module 130 by the sensor 230 and / or the first map 100 by the blocks 200 and 210 be replaced.

Claims (6)

Verfahren zur Steuerung eines Injektors, bei dem ein Temperaturgröße (TA), die die Temperatur des Injektors charakterisiert, bei der Steuerung berücksichtigt wird, dadurch gekennzeichnet, dass ausgehend von einer ersten Größe (QZ), die die elektrische Energie charakterisiert, die dem Injektor zugeführt wird, einem Wärmeübergangsfaktor (KW), und einer zweiten Größe, die die Kraftstofftemperatur (TD) charakterisiert, die Temperaturgröße (TA) ermittelt wird.Method for controlling an injector, in which a temperature variable (TA), which characterizes the temperature of the injector, is taken into account in the control, characterized in that, starting from a first variable (QZ), which characterizes the electrical energy that is fed to the injector is a heat transfer factor (KW), and a second variable that characterizes the fuel temperature (TD), the temperature variable (TA) is determined. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass ausgehend von ersten Betriebsparametern (AN, U, N) die erste Größe (QZ) ermittelt wird.Method according to Claim 1, characterized in that the first variable (QZ) is determined on the basis of first operating parameters (AN, U, N). Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ausgehend von zweiten Betriebsparametern (P) der Wärmeübergangsfaktor (KW) ermittelt wird.Method according to one of the preceding claims, characterized in that the heat transfer factor (KW) is determined on the basis of second operating parameters (P). Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die dritte Größe ausgehend von einem Messwert der Temperatur (TK) und wenigstens einem weiteren Betriebsparameter (N) ermittelt wird.Method according to one of the preceding claims, characterized in that the third variable is determined on the basis of a measured value of the temperature (TK) and at least one further operating parameter (N). Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, - dass die dritte Größe (TD) mittels eines Sensors erfasst wird.Method according to one of the preceding claims, characterized in that - the third variable (TD) is detected by means of a sensor. Vorrichtung zur Steuerung eines Injektors, bei der eine Temperaturgröße (TA), die die Temperatur des Injektors charakterisiert, bei der Steuerung berücksichtigt wird, dadurch gekennzeichnet, dass Mittel vorgesehen sind, die ausgehend von einer ersten Größe (QZ), die die elektrischen Energie charakterisiert, die dem Injektor zugeführt wird, einem Wärmeübergangsfaktor (KW), und einer zweiten Größe, die die Kraftstofftemperatur (TD) charakterisiert, die Temperaturgröße (TA) ermitteln.Device for controlling an injector, in which a temperature variable (TA), which characterizes the temperature of the injector, is taken into account in the control, characterized in that means are provided which, based on a first variable (QZ), characterize the electrical energy , which is fed to the injector, a heat transfer factor (KW), and a second variable, which characterizes the fuel temperature (TD), determine the temperature variable (TA).
EP03015277A 2002-09-07 2003-07-07 Method and device for controlling an injector Expired - Lifetime EP1396625B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002141506 DE10241506A1 (en) 2002-09-07 2002-09-07 Method and device for controlling an injector
DE10241506 2002-09-07

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EP1396625A2 true EP1396625A2 (en) 2004-03-10
EP1396625A3 EP1396625A3 (en) 2004-09-08
EP1396625B1 EP1396625B1 (en) 2007-09-26

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JP (1) JP4348146B2 (en)
DE (2) DE10241506A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2672094A1 (en) * 2012-06-08 2013-12-11 Robert Bosch Gmbh Method and device for controlling a piezoelectric actuator

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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DE102010042364B4 (en) 2010-10-13 2018-11-22 Robert Bosch Gmbh Method and device for determining an actuator temperature of a fuel injector for an internal combustion engine
DE102015208367A1 (en) 2015-05-06 2016-11-10 Robert Bosch Gmbh Method for determining the temperature of a piezoelectric actuator

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EP0360790A2 (en) * 1988-09-21 1990-03-28 Robert Bosch Ag Process and device to measure the fuel temperature in an electronically regulated combustion engine
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EP1396625B1 (en) 2007-09-26
DE50308271D1 (en) 2007-11-08
JP2004100702A (en) 2004-04-02
EP1396625A3 (en) 2004-09-08
DE10241506A1 (en) 2004-03-18
JP4348146B2 (en) 2009-10-21

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