WO2004003365A1 - Procede, programme informatique, dispositif de commande et/ou de regulation pour faire fonctionner un moteur a combustion interne - Google Patents

Procede, programme informatique, dispositif de commande et/ou de regulation pour faire fonctionner un moteur a combustion interne Download PDF

Info

Publication number
WO2004003365A1
WO2004003365A1 PCT/DE2003/001762 DE0301762W WO2004003365A1 WO 2004003365 A1 WO2004003365 A1 WO 2004003365A1 DE 0301762 W DE0301762 W DE 0301762W WO 2004003365 A1 WO2004003365 A1 WO 2004003365A1
Authority
WO
WIPO (PCT)
Prior art keywords
piezo actuator
buffer
potential difference
control
limit value
Prior art date
Application number
PCT/DE2003/001762
Other languages
German (de)
English (en)
Inventor
Johannes-Joerg Rueger
Udo Schulz
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to JP2004516465A priority Critical patent/JP2005531718A/ja
Priority to EP03740043A priority patent/EP1520092A1/fr
Publication of WO2004003365A1 publication Critical patent/WO2004003365A1/fr

Links

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
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • F02M59/468—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means using piezoelectric operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails

Definitions

  • the invention initially relates to a method for operating an internal combustion engine, in which an amount of fuel entering a combustion chamber depends on the activation of a piezo actuator of an injection valve, the activation energy of which is provided 5 by a buffer store.
  • a fuel injection system of an internal combustion engine which comprises a piezo actuator 0. It controls the amount of fuel to be injected. This is done by charging and discharging the piezo actuator using a driver circuit. When loading, the piezo actuator expands and moves a valve element coupled to it. The piezo actuator shortens again when it is 5 discharged.
  • the energy for charging the piezo actuator is provided by a buffer capacitor. This is recharged from a direct current source. The energy flowing out of the piezo actuator when it is discharged is fed back into the buffer capacitor.
  • the object of the present invention is therefore to develop a method of the type mentioned at the outset so that safe and simple monitoring of the correct functioning of the injection system is possible.
  • this object is achieved in that, at least at times, the result of actuating the piezo actuator
  • Potential difference of the buffer memory is at least approximately determined and used for a comparison with at least one limit value.
  • the correct function of the fuel injection system can be monitored continuously and without additional effort. This is done by monitoring the control, i.e. the charging and discharging, of the piezo actuator.
  • the piezo actuator is a central part of the fuel injection system, because it ultimately adjusts the amount of fuel entering the combustion chamber. Its correct functioning is therefore of central importance for the entire fuel injection system.
  • the invention is based on the idea that the operation of the piezo actuator can be monitored very well in that the electrical energy, which is at a control is transmitted to the piezo actuator or is emitted by it.
  • the basis for this is that, unlike a magnetic actuator, for example, a piezo actuator is only actuated for the actual length change, whereas no electrical energy flows when the piezo actuator is stationary, usually electrical energy is supplied to the piezo actuator to increase its length and for one Shortening its length dissipates electrical energy stored in it again.
  • the electrical energy that is supplied to the piezo actuator for actuation is provided by a buffer store, and the electrical energy is returned to this buffer store when the piezo actuator is actuated accordingly, usually the buffer store is a buffer capacitor.
  • the buffer store is a buffer capacitor.
  • an electrical energy with which the buffer store is charged between the times of determining its potential is determined and taken into account when determining an electrical charge that is actually exchanged between the piezo actuator and the buffer store.
  • the buffer memory is fed by a DC / DC converter. This DC / DC converter may reload the buffer memory between measurements.
  • the electrical energy actually delivered to or returned from the piezo actuator can therefore be determined with even greater accuracy if, when determining the potential difference in the buffer store resulting from the control of the piezo actuator, the electrical energy that may have flowed from the DC / DC converter into the buffer store is taken into account.
  • the energy with which the buffer store is loaded be added to or subtracted from the potential difference and the result of the addition or subtraction is used for the comparison with the at least one limit value.
  • loading the buffer memory to be deactivated for determining the buffer memory. This is possible from time to time if the buffer memory has a sufficiently high capacity. In this case, for example, programming of a map can be dispensed with, and accurate results are nevertheless achieved.
  • the potential difference of the piezo actuator is equal to or greater than is a first limit value, an error entry corresponding to a short circuit is made and / or an action corresponding to a short circuit is initiated.
  • a current also flows via the respective short circuit path.
  • the buffer store or the piezo actuator therefore discharges more than in the normal case, and the difference between the detected potentials is then at least equal to or greater than the first limit value.
  • the invention is based on the fact that one
  • the invention also relates to a computer program which is suitable for carrying out the above method if it is running on a computer. It is particularly preferred if the computer program is stored on a memory, in particular on a flash memory.
  • the present invention also relates to a control and / or control device for operating an internal combustion engine. This is particularly preferred if it comprises a memory on which a computer program according to one of claims 8 or 9 is stored.
  • the present invention relates to an internal combustion engine, which comprises a control and / or regulating device of the above type.
  • Figure 1 is a schematic representation of a
  • FIG. 2 shows a partial section through one of the injection valves of FIG. 1;
  • FIG. 3 shows a structural diagram of a method for operating the fuel system from FIG. 1;
  • FIG. 4 shows a flow diagram corresponding to the structural diagram of FIG. 3.
  • Figure 5 shows a section through another embodiment -a fuel injector.
  • a fuel system as a whole carries that
  • Reference numeral 10 It comprises a fuel tank 12, from which an electric fuel pump 14 delivers the fuel to a high-pressure fuel pump 16. This feeds a fuel rail 18 ("rail"), in which the fuel is stored under high pressure.
  • a plurality of fuel injection valves 20 are connected to the fuel rail 18. They inject the fuel directly into combustion chambers 22 of an internal combustion engine (not shown further).
  • the fuel injection valves are controlled by a control and regulating device 24.
  • the fuel injection valve 20 comprises a housing 26 with a blind hole 28. At its upper end there is a piezo actuator 30 which is connected to a piston 32.
  • the piston 32 delimits a working space 34 of a hydraulic converter.
  • Part of the hydraulic converter is also a piston 36 which is connected to a spherical valve element 38.
  • the piston 36 has a smaller diameter than the piston 32 and is tightly guided in the housing.
  • the valve element 38 cooperates with an upper valve seat 40 in FIG. 2 and with a lower valve seat 42 in FIG. 2.
  • the valve seats 40 and 42 partially delimit a cavity 44 which is connected to a control chamber 46 via a throttle (without reference number). This is in turn connected via a throttle (without reference number) and a pressure line 47 to the fuel collecting line 18.
  • the control chamber 46 is delimited at the bottom in FIG. 2 by a valve needle 48.
  • a channel 50 connects the fuel collecting line 18 to a pressure chamber (not visible) present in the area of the lower end of the valve needle 48.
  • the fuel injection valve 20 operates as follows:
  • the piezo actuator 30 can be charged and discharged again via a device which will be explained in more detail below.
  • Piezo actuator 30 shorter than when loaded.
  • the state with the shorter longitudinal extension is subsequently referred to as "short" for the sake of simplicity, and the state with the maximum
  • valve element 38 When the piezo actuator 30 is in its short or long state, the valve element 38 is seated on the valve seat 40 or on the valve seat 42. In both cases, the hydraulic pressure transmitted from the fuel manifold 18 via the pressure line 47 into the control chamber 46 holds the valve needle 48 in their closed position. Therefore, fuel cannot leak from the fuel injection valve 20.
  • Valve element 38 neither on the valve seat 40 nor on the valve seat 42. This leads to a pressure drop in the control chamber 46 and ultimately to a pressure difference between the upper end and the lower end of the valve needle 48. As a result, the valve needle in FIG. 2 moves upwards and gives clear the way for the fuel from channel 50. Fuel can thus exit the fuel injection valve 20 into the corresponding combustion chamber 22.
  • the control of the piezo actuator 30 is carried out by an electronic circuit 52, some components of which are shown in FIG. 2.
  • a voltage source 54 provides a DC voltage which is converted in a DC / DC converter 56 in accordance with the respective requirements.
  • a capacitor 58 is charged with the electrical energy provided by the DC / DC converter 56. This acts as a buffer store for the electrical energy to be supplied to or removed from the piezo actuator 30.
  • the capacitor 58 can be connected to the capacitor 58 via a charging switch 60 and a discharge switch 62
  • Piezo actuator 30 are connected.
  • the electrical charge stored in the capacitor 58 is detected by a measuring circuit 64.
  • Discharge switch 62 both open, so there is no current flowing between the piezo actuator 30 and the buffer capacitor 58. In order to bring the piezo actuator 30 from its short state to the long state, it must be charged electrically. For this purpose, the charging switch 60 is closed.
  • Discharge switch 62 remains open. Current therefore flows from the buffer capacitor 58 to the piezo actuator 30. As soon as the piezo actuator 30 has reached the desired end position, the lacquer switch 60 remains open again.
  • the electrical charge present in the piezo actuator 30 must be discharged again.
  • the discharge switch 62 is closed when the charging switch 30 is open.
  • the electrical stored in the piezo actuator 30 Charge is returned to the capacitor 5c in this way.
  • the measuring circuit 64 determines the state of charge of the buffer capacitor 58 before activation (reference number 66) and after activation
  • control can be understood here to mean charging the piezo actuator 30 and correspondingly discharging the buffer store 58 or also discharging the piezo actuator 30 and correspondingly charging the buffer capacitor 58.
  • the difference between the measured values before and after the activation is formed in 70.
  • a correction value is added to the difference clU1 determined in 70.
  • This correction value is determined on the basis of a characteristic curve 74, into which the time between the two measurements (reference numerals 66 and 68) and the current which has flowed from the DC / DC converter to the buffer compensator 58 are fed in.
  • the potential difference dU2 resulting from block 72 thus corresponds to the energy which has actually flowed from the buffer capacitor 58 to the piezo actuator 30 or which has flowed back from the piezo actuator 30 to the buffer connector 58.
  • the characteristic map 74 takes into account that the buffer capacitor 58 is recharged by the DC / DC converter 56 in the time period which lies between the detection of the potential of the buffer capacitor 58 before activation and the potential after activation.
  • the potential difference dU2 is fed into a first comparator 76, in which the potential difference dü2 is compared with an upper threshold value. If the potential difference dU2 is above this upper threshold value, this means that more current has flowed in and out between the buffer capacitor 58 and the piezo actuator 30 than is to be expected in the normal case. This is an indication of a short circuit, because in this case a current flows in addition to the normal charging current via the corresponding short circuit path. A corresponding error entry or an action then takes place (for example, switching off the activation of individual cylinders or the entire system).
  • the corresponding block has the reference symbol 78 in FIG. 1.
  • the potential difference dU2 is also fed into a second comparator 80 and compared there with a lower threshold value. If the potential difference dU2 is smaller than the lower threshold value, this is an indication of a load drop. In this case, when the piezo actuator 30 is actuated, no current flows from the capacitor 58 to the piezo actuator 30 or back, so the voltage of the buffer capacitor 58 does not change, or at least does not change significantly. A corresponding error entry and a corresponding action then take place (block 82).
  • a further embodiment of an injection valve is shown in FIG. Elements and areas which have functions equivalent to elements of the injection valve shown in FIG. 2 have the same reference numerals and are not described again in detail.
  • valve element 38 In contrast to the injection valve of Figure 2, that of Figure 5 is not double, but single-switching. This means that the valve element 38 only bears against a valve seat 40 in one switching position. When it lifts off the valve seat 40, it blocks a bypass duct 84 fluidly located between a high-pressure region 47 and the cavity 44 (this state is shown in FIG. 5). The pressure in the cavity 44 and, via a throttle channel 86, also in the control chamber 46 thus decrease via a low-pressure channel 88, which leads to a corresponding opening movement of the valve needle 48.

Landscapes

  • 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

Selon l'invention, un moteur à combustion interne fonctionne avec un système d'injection de carburant dans lequel une quantité de carburant arrivée dans une chambre de combustion dépend de la commande qu'exerce un actionneur piézo-électrique sur une soupape d'injection. L'énergie de commande (dU2) destinée à l'actionneur piézo-électrique est fournie par un accumulateur tampon. Selon l'invention, pour permettre à la fonction de commande d'être surveillée, la différence de potentiel (dU1, 70) de l'accumulateur tampon, résultant de la commande de l'actionneur piézo-électrique, est déterminée au moins approximativement au moins par intermittence, et utilisée pour la comparaison avec au moins une valeur seuil (76, 80).
PCT/DE2003/001762 2002-06-29 2003-05-30 Procede, programme informatique, dispositif de commande et/ou de regulation pour faire fonctionner un moteur a combustion interne WO2004003365A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2004516465A JP2005531718A (ja) 2002-06-29 2003-05-30 内燃機関を作動する方法、コンピュータプログラム、制御および／または調整装置ならびに内燃機関
EP03740043A EP1520092A1 (fr) 2002-06-29 2003-05-30 Procede, programme informatique, dispositif de commande et/ou de regulation pour faire fonctionner un moteur a combustion interne

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002129394 DE10229394A1 (de) 2002-06-29 2002-06-29 Verfahren, Computerprogramm, Steuer- und/oder Regelgerät zum Betreiben einer Brennkraftmaschine, sowie Brennkraftmaschine
DE10229394.5 2002-06-29

Publications (1)

Publication Number Publication Date
WO2004003365A1 true WO2004003365A1 (fr) 2004-01-08

Family

ID=29796041

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/001762 WO2004003365A1 (fr) 2002-06-29 2003-05-30 Procede, programme informatique, dispositif de commande et/ou de regulation pour faire fonctionner un moteur a combustion interne

Country Status (4)

Country Link
EP (1) EP1520092A1 (fr)
JP (1) JP2005531718A (fr)
DE (1) DE10229394A1 (fr)
WO (1) WO2004003365A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5125092B2 (ja) * 2006-12-19 2013-01-23 株式会社デンソー 駆動回路、燃料噴射用圧電素子の駆動回路、および燃料噴射装置
DE102007050298A1 (de) * 2007-10-22 2009-04-23 Robert Bosch Gmbh Verfahren zum Erkennen eines Lastabfalls
DE102008001971A1 (de) * 2008-05-26 2009-12-03 Robert Bosch Gmbh Verfahren zur Diagnose eines Lastabfalls

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067527A2 (fr) * 1998-06-25 1999-12-29 Siemens Aktiengesellschaft Procede et dispositif pour commander un actionneur capacitif
DE19841460A1 (de) * 1998-09-10 2000-03-16 Siemens Ag Verfahren und Vorrichtung zum Ansteuern eines kapazitiven Stellglieds
US6198199B1 (en) * 1998-09-08 2001-03-06 Siemens Aktiengesellschaft Method for diagnosing a short circuit at a capacitive actuator
EP1139444A1 (fr) * 2000-04-01 2001-10-04 Robert Bosch GmbH Système d'injection de carburant

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644521A1 (de) * 1996-10-25 1998-04-30 Siemens Ag Verfahren und Vorrichtung zum Ansteuern eines kapazitiven Stellgliedes
DE19723932C1 (de) * 1997-06-06 1998-12-24 Siemens Ag Verfahren zum Ansteuern wenigstens eines kapazitiven Stellgliedes
DE19845042C2 (de) * 1998-09-30 2000-08-24 Siemens Ag Verfahren und Anordnung zur Diagnose eines kapazitiven Aktors
DE10016476A1 (de) * 2000-04-01 2001-12-06 Bosch Gmbh Robert Verfahren zur Diagnose der Spannungsansteuerung für einen piezoelektrischen Aktor eines Einspritzventils
DE60018549T2 (de) * 2000-04-01 2006-04-20 Robert Bosch Gmbh Brennstoffeinspritzanlage
DE10028353C2 (de) * 2000-06-08 2003-02-20 Siemens Ag Verfahren zur Überprüfung eines kapazitiven Stellgliedes
DE10033196A1 (de) * 2000-07-07 2002-01-17 Bosch Gmbh Robert Verfahren bzw. Vorrichtungzur Erkennung eines Fehlerstromes an einem piezoelektrischen Aktor eines Einspritzventils oder an dessen Hochspannung führende Zuleitung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067527A2 (fr) * 1998-06-25 1999-12-29 Siemens Aktiengesellschaft Procede et dispositif pour commander un actionneur capacitif
US6198199B1 (en) * 1998-09-08 2001-03-06 Siemens Aktiengesellschaft Method for diagnosing a short circuit at a capacitive actuator
DE19841460A1 (de) * 1998-09-10 2000-03-16 Siemens Ag Verfahren und Vorrichtung zum Ansteuern eines kapazitiven Stellglieds
EP1139444A1 (fr) * 2000-04-01 2001-10-04 Robert Bosch GmbH Système d'injection de carburant

Also Published As

Publication number Publication date
JP2005531718A (ja) 2005-10-20
EP1520092A1 (fr) 2005-04-06
DE10229394A1 (de) 2004-01-29

Similar Documents

Publication Publication Date Title
EP1268999B1 (fr) Procede de determination de la pression de rampe d'une soupape d'injection comprenant un actionneur piezo-electrique
DE102009018289B3 (de) Verfahren und Vorrichtung zum Betreiben eines Einspritzventils
DE102008044144B4 (de) Kraftstoffeinspritzsteuerungsvorrichtung sowie Verfahren zur Steuerung einer Einspritzeigenschaft eines Kraftstoffeinspritzventils
DE102006047181A1 (de) Krafstoffeinspritzsystem, das zum Gewährleisten einer verbesserten Zuverlässigkeit zum Diagnostizieren eines Ventils ausgelegt ist
EP1664511B1 (fr) Procede de determination de la tension de commande d'un actionneur piezoelectrique d'une soupape d'injection
WO2011144445A1 (fr) Compensation adaptative de course à vide pour des soupapes d'injection de carburant
DE102009000133A1 (de) Kraftstoffeinspritzgerät
EP1172541B1 (fr) Actionneur piézo-électrique pour système d'injection
DE10064790A1 (de) Kraftstoffeinspritzvorrichtung der Bauart mit gemeinsamer Druckleitung
DE19954023B4 (de) Hochdruckkraftstoffeinspritzvorrichtung
WO2011154124A1 (fr) Procédé et dispositif servant à faire fonctionner une soupape d'injection
DE102010060713B4 (de) Fehlerdiagnosevorrichtung für ein Kraftstoffeinspritzsystem
EP1613851B1 (fr) Procede pour determiner la tension d'amorcage individuelle d'un element piezo-electrique
WO2010023041A1 (fr) Procédé de fonctionnement d'un dispositif d'injection de carburant pour un moteur à combustion interne
DE102007055860B4 (de) Antriebsschaltung, Antriebsschaltung für eine piezoelektrische Kraftstoffeinspritzvorrichtung und Kraftstoffeinspritzvorrichtung
EP1167729B1 (fr) Actionneur piézo-électrique pour injecteur
DE10357872A1 (de) Verfahren und Vorrichtung zur Bestimmung der Ansteuerspannung für einen piezoelektrischen Aktor eines Einspritzventils
WO2004003365A1 (fr) Procede, programme informatique, dispositif de commande et/ou de regulation pour faire fonctionner un moteur a combustion interne
DE10015647A1 (de) Verfahren und Vorrichtung zur Ansteuerung zumindest eines elektromagnetischen Verbrauchers
DE102005043684A1 (de) Kraftstoffdruckregelung bei Schubabschaltung
EP1718854B1 (fr) Procede et dispositif pour determiner les flancs de charge d'un actionneur piezo-electrique
DE10301822B4 (de) Verfahren zur Bestimmung der Längenausdehnung eines piezoelektrischen Aktors
DE102015217776A1 (de) Verfahren zur Erkennung einer Schädigung einer Düsennadel eines Kraftstoffinjektors oder des Düsennadelsitzes
DE102007000743B4 (de) Kraftstoffeinspritzsteuerungssystem
DE10304740A1 (de) Verfahren und Vorrichtung zur Bestimmung der Schaltspannung eines Piezostellers insbesondere eines Injektors einer Kraftstoffeinspritzanlage

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR

WWE Wipo information: entry into national phase

Ref document number: 2003740043

Country of ref document: EP

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2004516465

Country of ref document: JP

WWP Wipo information: published in national office

Ref document number: 2003740043

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 2003740043

Country of ref document: EP