EP1472454B1 - Procede et dispositif de detection d'etats de fonctionnement d'un ensemble pompe-gicleur - Google Patents

Procede et dispositif de detection d'etats de fonctionnement d'un ensemble pompe-gicleur Download PDF

Info

Publication number
EP1472454B1
EP1472454B1 EP03708014A EP03708014A EP1472454B1 EP 1472454 B1 EP1472454 B1 EP 1472454B1 EP 03708014 A EP03708014 A EP 03708014A EP 03708014 A EP03708014 A EP 03708014A EP 1472454 B1 EP1472454 B1 EP 1472454B1
Authority
EP
European Patent Office
Prior art keywords
piezo
voltage
pressure
fuel
detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03708014A
Other languages
German (de)
English (en)
Other versions
EP1472454A1 (fr
Inventor
Rainer Hirn
Richard Pirkl
Peter Voigt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP1472454A1 publication Critical patent/EP1472454A1/fr
Application granted granted Critical
Publication of EP1472454B1 publication Critical patent/EP1472454B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/701—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical

Definitions

  • the invention relates to a method for detecting the hydraulic control and / or the mechanical coupling of a piezo-control valve having a pump-nozzle unit. Furthermore, the invention relates to a device for controlling a piezo control valve of a pump-nozzle unit and for detecting the hydraulic control and / or the mechanical coupling of the pump-nozzle unit.
  • the mechanical coupling may include, for example, a striking of a valve pressure plate or a needle.
  • Pump-nozzle units are used for supplying fuel into a combustion chamber of an internal combustion engine.
  • This may be, for example, a pump-nozzle unit with a controllable and / or controllable fuel pump, a fuel injector, which has a between a closed position and an open position reciprocating nozzle needle, a first pressure chamber of the fuel pump with below a first pressurized fuel is fillable, a second pressure chamber, wherein in the second pressure chamber at a second pressure stationary fuel exerts a closing force on the nozzle needle, and a third pressure chamber communicating with the first pressure chamber, wherein in the third pressure chamber below a third Pressurized fuel exerts an opening force on the nozzle needle.
  • Pump-nozzle units are used in particular in connection with pressure-controlled injection systems.
  • An essential feature of a pressure-controlled injection system is that the fuel injector opens as soon as a At least from the currently prevailing pressures influenced opening force is exerted on the nozzle needle.
  • Such pressure-controlled injection systems are used for fuel metering, fuel preparation, the formation of the course of injection and a seal of the fuel supply against the combustion chamber of the internal combustion engine.
  • the time profile of the mass flow during the injection can be advantageously controlled. This can have a positive influence on the engine's performance, fuel consumption and pollutant emission.
  • the fuel pump and the fuel injector are typically formed as an integral component.
  • at least one pump-nozzle unit is provided, which is usually installed in the cylinder head.
  • the fuel pump typically comprises a fuel pump piston which can be moved back and forth in a fuel pump cylinder and which is driven either directly by a tappet or indirectly via rocker arms by a camshaft of the internal combustion engine.
  • the usually the first pressure chamber forming portion of the fuel pump cylinder is connected via a control valve with a fuel low pressure region, wherein sucked with the control valve open fuel from the low-pressure fuel area in the first pressure chamber and pushed back at further open control valve from the first pressure chamber in the low-pressure fuel area becomes.
  • the fuel pump piston compresses the fuel in the first pressure chamber and thus builds up the pressure.
  • the control valve in the form of a solenoid valve.
  • solenoid valves usually have a relatively long response time, which is particularly due to the fact that the magnet armature of a solenoid valve can not be accelerated arbitrarily fast due to the mass inertia forces dependent on its mass. Farther also requires the construction of the magnetic field to generate the tightening time.
  • a equipped with a solenoid valve pump-nozzle unit is for example from the EP 0 277 939 B1 known.
  • the problem may arise in particular at lower engine speeds that, due to a rapid opening of the piezo control valve and the abrupt deactivation of the highly compressed fuel caused thereby, a pressure wave is produced which has an unpleasant effect on the engine noise.
  • a pump nozzle unit and a method for controlling fuel metering in an internal combustion engine is known.
  • a valve is used to control the fuel flow into the internal combustion engine, wherein the valve is controlled by means of an actuating element so that it prevents the fuel flow in a first position and that it completely releases the fuel flow in a second position.
  • the actuating element is driven in such a way that the valve occupies at least one intermediate position.
  • a control circuit for driving a piezoelectric element is known. Furthermore, an error detection unit is provided, which detects a malfunction of the piezoelectric element in response to the voltage of the control circuit and outputs an error signal.
  • the invention has the object of developing the generic methods and devices such that the detection of the hydraulic control of the pump-nozzle unit, with a relatively low hardware and / or software cost is made possible.
  • the inventive method is based on the generic state of the art in that the detection is performed by comparing only the piezo voltage with at least one predetermined threshold.
  • F is the pressure on the piezoelectric element
  • u the piezoelectric voltage
  • i the piezoelectric current
  • c1 is a first constant
  • c2 is a second constant
  • t is the time.
  • the piezo control valve can be opened throttled, for example, to avoid the problem explained above.
  • the Hochscherab capitaung runs then slower and thus quieter.
  • the piezo control valves generally have high sensitivity in throttled operation on. For throttled opening, therefore, a highly accurate positioning of the control valve is advantageous.
  • Such a highly accurate positioning of the control valve can be achieved for example by a piezo-controlled control valve actuator with appropriate control. Also, for such a regulation, it is necessary to detect the force curve or the time of the beginning of the hydraulic control, which can also be done in the manner according to the invention. 6
  • the detection of the operating state is performed by comparing the piezo voltage with at least one predetermined threshold while an at least substantially constant piezoelectric current is forced.
  • the at least substantially constant piezoelectric current is approximately zero amperes.
  • the output of the piezoelectric element driving device can be decoupled from the piezoelectric element or terminated high impedance. In this case, an exchange of the induced charge carriers by force is not possible.
  • the detection of the operating state is performed by comparing the piezo voltage with at least one predetermined threshold value after the piezo voltage has been maintained at an at least substantially constant value.
  • the at least substantially constant value of the piezoelectric voltage is smaller than a piezoelectric voltage previously used for driving the piezo control valve and greater than zero volts.
  • the piezoelectric element is discharged after a stepped discharge to a certain level and maintained at this level for a predetermined holding phase. During this holding phase, the control is decoupled or closed high-impedance, so that no charge exchange takes place.
  • the simplified relationship of formula 3 is valid.
  • the further determination of the force jump (formula 4) is only possible with difficulty because the partial discharge level is not known exactly.
  • the voltage-dependent constant c1 must be taken into account in this case as polynomial 1st order in the differentiation, which can be done for example via a stored map.
  • the device according to the invention builds on the generic state of the art in that it performs the detection of the operating state by comparing the piezo voltage with at least one predetermined threshold, wherein an at least substantially constant piezoelectric current is enforced.
  • the device performs the detection of the operating state by comparing the piezo voltage with at least one predetermined threshold while it forces an at least substantially constant piezoelectric current.
  • the at least substantially constant piezoelectric current is approximately zero amperes.
  • the device performs the detection of the operating state by comparing the piezo voltage with at least one predetermined threshold value after it has kept the piezo voltage at an at least substantially constant value.
  • the at least substantially constant value of the piezoelectric voltage is smaller than a piezoelectric voltage previously used for driving the piezo control valve and greater than zero volts.
  • the circuit design is preferably adapted so that the piezoelectric actuator is short-circuited during the detection phase or terminated high-impedance.
  • a force jump can then be represented directly by the current profile or by the differentiated voltage.
  • FIG. 1 schematically shows a pump-nozzle unit.
  • the illustrated pump-nozzle unit for supplying fuel 10 into a combustion chamber 12 of an internal combustion engine has a fuel pump 14-22.
  • a fuel pump piston 14 in a fuel pump cylinder 16 is movable back and forth.
  • the fuel pump piston 14 is driven directly or indirectly via a camshaft, not shown, of the internal combustion engine.
  • the compression space of the fuel pump cylinder 16 forms a first pressure chamber 28.
  • the first pressure chamber 28 is connected via a fuel line 20 to the piezo control valve 22 to be triggered according to the invention.
  • the piezo control valve 22 serves to either close the fuel line 20 or to connect it to a fuel low-pressure region 18, from which fuel 10 can be sucked.
  • the piezo control valve 22 In the open rest position of the piezo control valve 22 is at a relative to FIG. 1 upward movement of the fuel pump piston 14 10 fuel sucked from the low-pressure fuel area 18 into the first pressure chamber 28. If the piezo control valve 22 is based on a FIG. 1 downwardly directed movement of the fuel pump piston 14 is still in its open rest position, previously sucked into the first pressure chamber 28 fuel 10 can be pressed back into the low-pressure fuel area 18 again. With a suitable control of the piezo control valve 22 closes, this is the fuel line 20.
  • the illustrated unit injector further includes a fuel injector, generally designated 24. the one between a closed position and an open position back and forth movable nozzle needle 46 has.
  • a pressure pin 26 may, based on the representation of FIG. 1 , in particular exert a downward force on the nozzle needle 46.
  • a dial 40 is provided, which is guided in a second pressure chamber 30, wherein in the second pressure chamber 30 at a second pressure p 30 standing fuel 10 via the pressure pin 26 a based on the representation of FIG.
  • the shim 40 is preferably only so strongly sealed relative to the second pressure chamber 30 that the second pressure p 30 is already degraded before the start of a new injection cycle.
  • a further downwardly directed further closing force is exerted by a first spring 36 on the pressure pin 26 and thus the nozzle needle 46, wherein the first spring 36 is disposed in the second pressure chamber 30 and is supported with its rear end on the shim 40.
  • a shoulder 44 having a portion of the nozzle needle 46 is surrounded by a third pressure chamber 32 which communicates with the first pressure chamber 28 via a connecting line 42.
  • a third pressure p 32 is built up in the third pressure chamber 32 as a function of the first pressure p 28 prevailing in the first pressure chamber 28.
  • the standing in the third pressure chamber 32 under the third pressure p 32 fuel 10 exercises a relative to the representation of FIG. 1 upward opening force on the nozzle needle 46 from.
  • the nozzle needle 46 assumes its open position as long as a difference between the opening force caused by the third pressure p 32 and the sum of the closing force generated by the second pressure p 30 and the closing force generated by the first spring 36 exceeds a predetermined value.
  • the nozzle opening pressure can be influenced via the second pressure p 30 in the second pressure chamber 30.
  • a pressure limiting and holding valve 34 may be provided between the first pressure chamber 28 and the second pressure chamber 30 in the second pressure chamber 30 to limit and maintain suitable values p 30 .
  • the illustrated pump-nozzle unit can be monitored by the method according to the invention for operating states of interest, for example a triggering pulse which results when the fuel injection into the combustion chamber 12 is ended.
  • an embodiment of the device 80 according to the invention can be used in an advantageous manner, which controls the piezoelectric element of the piezo control valve 22.
  • FIG. 2 shows a schematic partial sectional view of a piezo control valve 22, which with the pump-nozzle unit after FIG. 1 can be used.
  • the illustrated piezo control valve 22 has a movable element 48 in the form of a valve needle, which can be moved to close the piezo control valve 22 in the illustrated first end position and the complete opening of the piezo control valve 22 in a second end position, based on the representation is shifted to the right.
  • a valve plate 64 provided on the valve needle 48 cooperates with a housing-side valve seat 62.
  • the low-pressure fuel area 18 is closed relative to a high-pressure chamber 38, which is connected to the in FIG. 1 shown fuel line 20 is in communication.
  • the piezo control valve 22 has a piezoelectric element 76. With suitable control of the piezoelectric element 76, this exerts a force on a pressure piece 54 via an end face 78.
  • the pressure member 54 transmits the force generated by the piezoelectric element 76 in turn to a first lever 56 and a second lever 58, wherein the first lever 56 and the second lever 58 are provided to effect a power transmission.
  • the first lever 56 and the second lever 58 abut on a second axial end surface 72 of the valve needle 48 to the from the piezoelectric element 76 generated to transmit transmitted force to the valve needle 48.
  • the translated force generated by the suitably driven piezoelectric element 76 acting on the valve needle 48 is greater than an opposing force generated by a second spring 66 and exerted via a spring pressure member 68 on a first axial end surface 70 of the valve needle 48.
  • the low-pressure fuel area 18 communicates with a discharge chamber 50, which continues to communicate with an actuator chamber 74 located in front of the piezoelectric element 76 via a compensation bore 52.
  • This actuator chamber 74 is in communication with a return 60, via which fuel can flow back out of the actuator chamber 74.
  • the piezo element 76 can be controlled by the first, second or third embodiment of the device according to the invention such that the first, second or third embodiment of the method according to the invention is carried out, resulting in the explained in the following Figures 3 . 4 or 5 can show curves shown.
  • FIG. 3 is the piezoelectric voltage u (t) initially increased linearly in an interval between the times t 1 and t 2 .
  • the piezoelectric current i (t) first increases within this interval and then drops back to zero.
  • the pressure p 38 in the high pressure chamber 38 increases.
  • the piezoelectric voltage is kept approximately constant, wherein the piezoelectric current i (t) during this interval has the value zero.
  • the pressure p 38 in the high-pressure chamber 38 continues to increase.
  • the piezo voltage u (t) is reduced again to zero.
  • the piezoelectric current i (t) first assumes a negative value and then rises again to zero.
  • the pressure p 38 in the high-pressure chamber 38 initially increases even further and then begins to fall off.
  • a piezo voltage u (t) of zero volts is forced.
  • the control pulse caused by the hydraulic control of the piezostream i (t) can now be detected by comparing the piezoelectric current i (t) with a detection threshold.
  • a detection signal for the tripping pulse is generated at the time t 5 .
  • FIG. 3 thus illustrates a Abêtpulsdetetation by the piezoelectric current i (t) after complete discharge, which does not belong to the invention.
  • FIG. 4 is the piezoelectric voltage u (t) initially increased linearly in an interval between the times t 1 and t 2 .
  • the piezoelectric current i (t) first increases within this interval and then drops back to zero.
  • the pressure p 38 in the high pressure chamber 38 increases.
  • the piezoelectric voltage is kept approximately constant, wherein the piezoelectric current i (t) during this interval has the value zero.
  • the pressure p 38 in the high-pressure chamber 38 continues to increase.
  • the piezo voltage u (t) is reduced again to zero.
  • the piezoelectric current i (t) first assumes a negative value and then rises again to zero.
  • the pressure p 38 in the high-pressure chamber 38 initially increases even further and then begins to fall off.
  • a piezoelectric current i (t) of zero is forced by a high-impedance termination.
  • a tripping pulse generated by the tripping of the piezo voltage u (t) can now be compared with a detection threshold value for the piezo voltage.
  • a detection signal for the tripping pulse is again generated, as shown in FIG FIG. 4 shown below.
  • the curve of FIG. 4 thus corresponds to a Abgrespulsdetetation by the piezoelectric voltage u (t) after complete discharge.
  • FIG. 5 is the piezoelectric voltage u (t) initially increased linearly in an interval between the times t 1 and t 2 .
  • the piezoelectric current i (t) initially increases within this interval and then drops back to zero.
  • the pressure p 38 in the high pressure chamber 38 increases.
  • the piezoelectric voltage is kept approximately constant, wherein the piezoelectric current i (t) during this interval has the value zero.
  • the pressure p 38 in the high-pressure chamber 38 continues to increase.
  • the piezo voltage u (t) drops to a value> zero.
  • the piezoelectric current i (t) assumes a negative value and then rises again to zero, while the pressure p 38 in the high-pressure chamber 38 continues to rise. From time t 4 , a piezoelectric current i (t) of zero is forced by a high-impedance termination.
  • the piezo voltage u (t) therefore remains at the value that it had at time t 3 until the tripping pulse of the piezo voltage u (t) occurs.
  • This tripping pulse can be detected by comparing the piezo voltage u (t) with a detection threshold value, in which case the detection threshold value must have a higher value than the piezo voltage u (t) had at time t 3 .
  • a detection of the hydraulic control of a piezo-control valve having a pump-nozzle unit is performed according to the invention by the piezoelectric voltage is compared with at least one predetermined threshold. For this purpose, during the detection phase for the not used for comparison piezoelectric current an at least substantially constant value of preferably zero is enforced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne la détection de la fin du refoulement hydraulique et/ou du couplage mécanique d'un ensemble pompe/gicleur comportant une soupape de commande piézo (22). Cette détection se fait en particulier par comparaison soit du courant piézo (i(t)) seul, soit de la tension piézo (u(t)) avec au moins une valeur seuil pré-allouée. A cet effet, pendant la phase de détection, soit une valeur sensiblement constante de préférence de 0 volt est obtenue de façon forcée pour la tension piézo (u(t)) non prise en considération pour la comparaison, soit une valeur au moins sensiblement constante de préférence de 0 est obtenue de force pour le courant piézo (i(t)) non pris en compte pour la comparaison.

Claims (8)

  1. Procédé de détection de la commande hydraulique et/ou du couplage mécanique en tant qu'état de fonctionnement d'un ensemble pompe-gicleur comprenant une soupape de commande piézo-électrique (22), caractérisé en ce que la détection de l'état de fonctionnement est effectuée par comparaison de la tension piézo-électrique (u(t)) à au moins une valeur de seuil prédéterminée, pendant qu'est imposé un courant piézo-électrique (i(t)) au moins essentiellement constant.
  2. Procédé selon la revendication 1, caractérisé en ce que le courant piézo-électrique (i(t)) au moins essentiellement constant vaut environ zéro Ampère.
  3. Procédé selon la revendication 1, caractérisé en ce que la détection de l'au moins un état de fonctionnement est effectuée par comparaison de la tension piézo-électrique (u(t)) à au moins une valeur de seuil prédéterminée après que la tension piézo-électrique a été maintenue constante à une valeur au moins essentiellement constante.
  4. Procédé selon la revendication 3, caractérisé en ce que la valeur au moins essentiellement constante de la tension piézo-électrique (u(t)) est inférieure à une tension piézo-électrique (u(t)) utilisée auparavant pour la commande de la soupape de commande piézo-électrique (22), et supérieure à zéro Volt.
  5. Dispositif pour la commande d'une soupape de commande piézo-électrique (22) d'un ensemble pompe-gicleur et pour la détection de la commande hydraulique et/ou le couplage mécanique de l'ensemble pompe-gicleur en tant qu'état de fonctionnement de celui-ci, caractérisé en ce qu'il est agencé pour effectuer la détection de l'au moins un état de fonctionnement par comparaison de la tension piézo-électrique (u(t)) à au moins une valeur de seuil prédéterminée pendant qu'est imposé un courant piézo-électrique (i(t)) au moins essentiellement constant.
  6. Dispositif selon la revendication 5, caractérisé en ce que le courant piézo-électrique (i(t)) au moins essentiellement constant vaut environ zéro Ampère.
  7. Dispositif selon la revendication 5, caractérisé en ce qu'il est agencé pour effectuer la détection de l'au moins un état de fonctionnement par comparaison de la tension piézo-électrique (u(t)) à au moins une valeur de seuil prédéterminée après que la tension piézo-électrique a été maintenue constante à une valeur au moins essentiellement constante.
  8. Dispositif selon la revendication 7, caractérisé en ce que la valeur au moins essentiellement constante de la tension piézo-électrique (u(t)) est inférieure à une tension piézo-électrique (u(t)) utilisée auparavant pour la commande de la soupape de commande piézo-électrique (22), et supérieure à zéro Volt.
EP03708014A 2002-02-07 2003-02-03 Procede et dispositif de detection d'etats de fonctionnement d'un ensemble pompe-gicleur Expired - Lifetime EP1472454B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10205113 2002-02-07
DE10205113 2002-02-07
PCT/DE2003/000297 WO2003067073A1 (fr) 2002-02-07 2003-02-03 Procede et dispositif de detection d'etats de fonctionnement d'un ensemble pompe-gicleur

Publications (2)

Publication Number Publication Date
EP1472454A1 EP1472454A1 (fr) 2004-11-03
EP1472454B1 true EP1472454B1 (fr) 2009-08-12

Family

ID=27674584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03708014A Expired - Lifetime EP1472454B1 (fr) 2002-02-07 2003-02-03 Procede et dispositif de detection d'etats de fonctionnement d'un ensemble pompe-gicleur

Country Status (3)

Country Link
EP (1) EP1472454B1 (fr)
DE (1) DE50311804D1 (fr)
WO (1) WO2003067073A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10349307B3 (de) * 2003-10-23 2005-05-25 Siemens Ag Diagnoseverfahren für einen elektromechanischen Aktor
DE102004020937B4 (de) * 2004-04-28 2010-07-15 Continental Automotive Gmbh Verfahren zum Bestimmen einer Schließzeit eines Schließgliedes und Schaltungsanordnung
DE102004029906B4 (de) * 2004-06-21 2017-01-19 Continental Automotive Gmbh Verfahren und Vorrichtung zum Steuern eines Einspritzventils und Computerprogramm
DE102004058971B4 (de) * 2004-12-08 2006-12-28 Volkswagen Mechatronic Gmbh & Co. Kg Verfahren zum Steuern eines piezoelektrischen Aktors und Steuereinheit zum Steuern eines piezoelektrischen Aktors
DE102005016279B4 (de) 2005-04-08 2018-09-13 Continental Automotive Gmbh Schaltungsanordnung und Verfahren zum Betätigen eines auf- und entladbaren, elektromechanischen Stellgliedes
DE102008061586B4 (de) 2008-12-11 2015-08-20 Continental Automotive Gmbh Verfahren und Vorrichtung zur Ansteuerung eines Festkörperaktuators
DE102014209326A1 (de) * 2014-05-16 2015-11-19 Robert Bosch Gmbh Verfahren zur Bestimmung eines Schließzeitpunktes eines Kraftstoffinjektors

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5097171A (en) * 1989-10-24 1992-03-17 Nippondenso Co., Ltd. Piezo-actuator shock absorber damping force controlling system having abnormality detection function
JPH04286657A (ja) * 1991-03-18 1992-10-12 Fujitsu Ltd 圧電素子の異常検出回路
DE19835494C2 (de) * 1998-08-06 2000-06-21 Bosch Gmbh Robert Pumpe-Düse-Einheit
DE19930309C2 (de) * 1999-07-01 2001-12-06 Siemens Ag Verfahren und Vorrichtung zur Regelung der Einspritzmenge bei einem Kraftstoffeinspritzventil mit Piezoelement-Aktor
DE10038995A1 (de) * 1999-10-16 2001-04-19 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung der Kraftstoffzumessung in einer Brennkraftmaschine
US6420817B1 (en) * 2000-02-11 2002-07-16 Delphi Technologies, Inc. Method for detecting injection events in a piezoelectric actuated fuel injector

Also Published As

Publication number Publication date
WO2003067073A1 (fr) 2003-08-14
EP1472454A1 (fr) 2004-11-03
DE50311804D1 (de) 2009-09-24

Similar Documents

Publication Publication Date Title
EP1488088B1 (fr) Procede et dispositif de detection du moment d'impact du pointeau d'une soupape de commande piezoelectrique
EP1636484B1 (fr) Injecteur pour moteurs a combustion interne
EP1593840A2 (fr) Procédé et dispositif pour la mise en forme de la pression d'injection d'un injecteur de carburant
WO2006061113A1 (fr) Procede pour commander un actionneur piezoelectrique, et unite de commande pour commander un actionneur piezoelectrique
EP1342005B1 (fr) Systeme d'injection de carburant pour moteurs a combustion interne
EP1203151B1 (fr) Electrovanne bietagee destinee a un injecteur d'un moteur a combustion
EP1430208B1 (fr) Dispositif d'injection de carburant destine a un moteur a combustion interne
EP1704316B1 (fr) Procede et dispositif pour reguler une soupape et procede et dispositif pour reguler un ensemble injecteur-pompe avec cette soupape
DE19882042B4 (de) Kontrollvorrichtung und Kontrollverfahren für eine nockengetriebene, elektronisch gesteuerte Pumpe-Düse-Einspritzeinheit
DE69824860T2 (de) Hydraulisch betätigtes elektronisches einspritzsystem
EP1472454B1 (fr) Procede et dispositif de detection d'etats de fonctionnement d'un ensemble pompe-gicleur
DE19516245C2 (de) Verfahren zum Steuern einer mehrphasigen Einspritzung eines direkt einspritzenden Dieselmotors
EP1483498A1 (fr) Dispositif d'injection de carburant pour un moteur a combustion interne
WO2003091559A1 (fr) Dispositif et procede pour commander le piezo-actionneur d'une soupape de commande d'une unite pompe-gicleur
EP1488089B1 (fr) Procede et dispositif de commande de l'actionneur piezoelectrique de la soupape de distribution piezoelectrique d'une unite de pompe d'injection
DE10310120B4 (de) Verfahren zur Bestimmung der auf einen Piezoaktor ausgeübten Last sowie Verfahren und Vorrichtung zur Ansteuerung eines Piezoaktors eines Steuerventils einer Pumpe-Düse-Einheit
EP1472455B1 (fr) Procede et dispositif pour piloter une soupape de commande d'un ensemble pompe-gicleur
DE10140093A1 (de) Verfahren und Vorrichtung zum Ansteuern eines Magnetventils
EP1236885B1 (fr) Dispositif d'injection de carburant pour un moteur à combustion interne
EP1546545B1 (fr) Unite pompe-buse et procede pour reguler la durete de zones d'appui d'une soupape de commande
DE10059399B4 (de) Vorrichtung zur Verbesserung der Einspritzabfolge bei Kraftstoffeinspritzsystemen
DE102020130979A1 (de) Kraftstoffeinspritzsystem
EP1258621A2 (fr) Méthode de contrôle d'une pompe à carburant commandée par une électrovanne dans un moteur à combustion interne
DE10310585A1 (de) Pumpe-Düse-Einheit
WO2004057176A1 (fr) Unite d'injecteur-pompe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040805

AK Designated contracting states

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 LI LU MC NL PT SE SI SK TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SIEMENS VDO MECHATRONIK GMBH & CO. KG

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: CONTINENTAL AUTOMOTIVE GMBH

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAC Information related to communication of intention to grant a patent modified

Free format text: ORIGINAL CODE: EPIDOSCIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50311804

Country of ref document: DE

Date of ref document: 20090924

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20100517

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100203

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20101029

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090812

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100203

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 50311804

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50311804

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20210228

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50311804

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: VITESCO TECHNOLOGIES GMBH, 30165 HANNOVER, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50311804

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220901