EP1398487A1 - Verfahren und Vorrichtung zur Steuerung eines Piezoinjektors - Google Patents

Verfahren und Vorrichtung zur Steuerung eines Piezoinjektors Download PDF

Info

Publication number
EP1398487A1
EP1398487A1 EP03292209A EP03292209A EP1398487A1 EP 1398487 A1 EP1398487 A1 EP 1398487A1 EP 03292209 A EP03292209 A EP 03292209A EP 03292209 A EP03292209 A EP 03292209A EP 1398487 A1 EP1398487 A1 EP 1398487A1
Authority
EP
European Patent Office
Prior art keywords
voltage
stage
transducer
switch
control
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.)
Granted
Application number
EP03292209A
Other languages
English (en)
French (fr)
Other versions
EP1398487B1 (de
Inventor
Christophe Ripoll
André AGNERAY
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP1398487A1 publication Critical patent/EP1398487A1/de
Application granted granted Critical
Publication of EP1398487B1 publication Critical patent/EP1398487B1/de
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
    • 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

Definitions

  • the invention relates to the field of injection control of fuel for an internal combustion engine intended for example for equip a motor vehicle.
  • the invention relates more particularly to an order fuel injection to atomize the fuel injected in the form of very fine droplets.
  • Such injection systems include an electric pump fuel supply which feeds, through a ramp of distribution, all injectors under pressure having a constant difference with the pressure prevailing in the manifold intake through a pressure regulator.
  • an electric pump fuel supply which feeds, through a ramp of distribution, all injectors under pressure having a constant difference with the pressure prevailing in the manifold intake through a pressure regulator.
  • Controlled needle type injectors electromagnetically which are the most commonly used, have limitations which hinder the improvement of engine performance, particularly in terms of pollution control.
  • the times taken to open or close the needles are still too high, about 1 to 2 ms, which prevents distribution the injection correctly over the entire opening time of the valve.
  • the minimum opening time which determines the dose minimum of fuel that can be injected, is still too important for certain engine operating points.
  • Known needle injectors also have injection holes of relatively large diameters for allow to charge the required quantities of fuel for the full load operations and high engine speeds. This layout generates fuel jets with drops of large dimensions, which slows fuel vaporization (and therefore the preparation of the fuel mixture) and is able to promote the wall wetting phenomenon.
  • the non-vaporized fuel tends to settle on the walls of the intake duct or combustion chamber in direct injection.
  • Such a deposit causes dosage problems, particularly acute in transients due to lack of knowledge of the amount of fuel that actually enters the corresponding combustion chamber.
  • This wetting phenomenon of the walls is one of the important causes of high emissions of pollutants during cold engine starts.
  • Document FR-A-2 801 346 describes a device for injecting fuel for internal combustion engine fitted with an injector with a fuel nozzle and at the end of which is formed an injection orifice, means for setting cyclic vibration of the nozzle such as a time-controlled transducer and in intensity by the electronic engine control system, and shutter means recalled by elastic return means against the end of the nozzle, said elastic return means being formed by a rod passing through the body of the injector up to a cavity located at the opposite end with respect to the injection orifice, said rod cooperating with a mass and damping means housed in said cavity, the vibration of the nozzle and the means shutters ensuring the ejection of a quantity of fuel predetermined.
  • the invention provides a control device for get the most out of such an injector.
  • the invention provides an injector control device allowing optimal combustion of the injected fuel while remaining simple and economical structure.
  • the control device is intended for at least one injector equipped with at least one suitable transducer to move on receipt of an electrical command, the device comprising means for generating a control signal defined by at least one injection voltage, frequency and duration.
  • One at less voltage or frequency variables is a setpoint varying according to instructions received by the ordered.
  • the duration In addition, an instruction varying according to instructions received by the controller.
  • the voltage and the frequency are setpoints varying according to instructions received by the control device.
  • the device includes means for selecting a transducer during a fixed duration T, and a means for supplying said transducer during said duration T with a modulated voltage capable of displacing said transducer between two opposite positions.
  • the device comprises a first stage provided with cutting means for adjust the tension.
  • the cutting means may include a input choke, a branch mounted between the output of inductance and earth and comprising an electronic switch, and a second branch parallel to the first and comprising a diode and a filter capacitor connected in series, the output of the first stage being taken at the common point between the diode and the capacitor the second branch.
  • the electronic switch may include a transistor and a diode mounted in anti-parallel.
  • the device comprises a second stage comprising an inductor and a electronic switch mounted in series, the common point the inductor and the switch forming the output of the second stage, the other terminal of the inductor forming the entry of the second stage, and the other terminal of the switch being connected to earth.
  • the switch electronics may include a transistor and a diode mounted in antiparallel. The exit from the first floor is advantageously connected to the entrance to the second floor and the mass is common.
  • the device comprises a third stage comprising, for each transducer, a electronic switch mounted in series with said transducer.
  • the electronic switch may include a transistor and a diode mounted in antiparallel.
  • the second floor outlet can be connected to the entrance to the third floor and the common ground.
  • a plurality of transducers are mounted in parallel.
  • the device comprises a computer for control capable of controlling power components.
  • the computer can receive a voltage setpoint from outside the device.
  • the computer then generates signals control of the electronic switch of the first stage and of the third floor electronic switches.
  • the device may include a means for generating the second stage electronic switch control signal, said generating means being provided with a voltage divider at resistance connected to the output of the second stage and to ground, of a PID comparator-regulator with one input connected to the output of the voltage divider, and an input is connected to an output of the computer, and a pulse width modulation element whose input is connected to the output of the regulator and the output is connected to the input of second stage electronic switch control.
  • the computer can generate a setpoint according to measurements from outside the device, and signals from control of the third stage electronic switch (es).
  • the device can include a means for generating control signals of the electronic switches of the first and second stages, said generation means comprising a frequency of the output of the second stage, a converter frequency / voltage whose input is connected to the output of the frequency, a PID comparator-regulator whose input is connected to the output of the frequency / voltage converter and an input is connected at the output of the computer, and a width modulation element of pulses whose input is connected to the output of the regulator, a output is connected to the switch control input of the first floor and another output is connected to the control input of the switch on the second floor.
  • the pulse width modulation element can include an output voltage controlled oscillator (VCO) from which is mounted a pulse width generation module with variable frequency.
  • VCO output voltage controlled oscillator
  • the device comprises a means for select a transducer for a determined period T and a means for supplying said transducer for said duration T with a modulated voltage capable of moving said transducer between two opposite positions.
  • the device may include means for making vary the duration T, a means for varying the frequency of voltage modulation, and means for varying the voltage modulated.
  • a device for control 1 is supplied by a voltage source 2, for example the battery of the vehicle in which it is mounted, or more generally the vehicle electrical network, for example of the continuous type 12 or 42 volts or alternatively.
  • a voltage source 2 for example the battery of the vehicle in which it is mounted, or more generally the vehicle electrical network, for example of the continuous type 12 or 42 volts or alternatively.
  • the control device 1 is designed to supply four piezoelectric injectors represented by the same symbol as a capacitor due to the electrical characteristics of a cell piezoelectric which is similar to that of a capacitor and referenced 3 to 6.
  • the control device 1 itself is equipped with three power stages referenced 7 to 9, a control computer 10 and an interface for developing control signals referenced 11 and disposed between the computer 10 and the second stage 8, the computer emitting control signals directly to the first floor 7 and third floor 9.
  • the first stage 7, intended for cutting includes an entrance 12 connected to the voltage source 2 and an output 13 connected to the second stage 8.
  • the first stage 7 comprises an inductor 14 connected to input 12 and an electronic switch 15 mounted in series with inductor 14, the common point of inductor 14 and the switch 15 being noted 16, the other terminal of the switch 15 being connected to the mass.
  • the switch 15 includes a transistor 17 provided with a control input 18 and a diode 19 mounted in anti-parallel.
  • a bidirectional current type transistor In the illustrated case, the transistor 17 could be of the MOS type.
  • the diode 20 In addition to the switch 15, there is also mounted a diode 20 and a capacitor 21 in series, the diode 20 being connected to the point 16 and the capacitor 21 filters the voltage.
  • the output 13 of the first stage 7 is taken at the common point between the diode 20 and the capacitor 21.
  • the second stage 8 includes an inductor 22 and a electronic switch 23 connected in series between the input of the second stage 8 connected to the output 13 of the first stage 7 and the ground.
  • the switch 23 can be of a type analogous to the switch 15 with a transistor 24 equipped with a control input 25 and a diode 26 mounted in anti-parallel.
  • the common point between inductance 22 and the electronic switch 23 forms the output 27 of the second stage 8.
  • the other terminal of the electronic switch 23 is connected to ground.
  • the output 27 of the second stage 8 is connected to first terminals of injectors 3 to 6 which are electrically mounted in parallel.
  • the opposite terminals of injectors 3 to 6 are connected to the third floor 9.
  • the third stage 9 includes four switches electronic 28 to 31, each connected in series respectively with a injector 3, 4, 5, 6.
  • Each electronic switch 28 to 31 includes a structure similar to that of switch 15, namely a transistor, for example of the MOS type, and a diode mounted in anti-parallel.
  • the opposite terminals of electronic switches 28 to 31 to injectors 3 to 6 are connected to ground.
  • Each entry of control of electronic switches 28 to 31 is connected to the calculator 10.
  • the computer 10 receives as input a voltage setpoint and is provided with six outputs intended respectively for the entry of control 18 of the electronic switch 15 of the first stage 7, at interface 11 and to the switch control inputs electronic 28 to 31 of the third stage 9.
  • the interface 11 comprises a resistance divider comprising a resistor 32 and a resistor 33 connected in series between the output 27 of the second stage 8 and the mass, the divided voltage being taken in common between said resistors 32 and 33.
  • the interface 11 also includes a comparator-regulator, by PID type example, provided with an input connected to the computer 10, from another input receiving the divided voltage from the point common to resistors 32 and 33 and an output connected to an element 35 pulse width modulation which is also part of interface 11.
  • Element 35 sends a control signal to the input 25 of the switch 23 of the second stage 8.
  • the number of injectors is linked to the number of cylinders of the motor vehicle and will therefore generally between 1 and 12.
  • the control device 1 makes it possible to generate a high periodic voltage which can be greater than a hundred volts at a high frequency, typically greater than ten kiloHertz, on the piezoelectric cell of an injector from the voltage source 2.
  • Switches 28 to 31 allow select the injector to be activated.
  • Switch 15 of first stage 7 makes it possible to carry out a cutting of a tension continuous input and the switch 23 of the second stage 8 allows determining a width modulation type waveform pulse.
  • the first curve shows the voltage C 28 on the control input of the switch 28, the second curve the voltage C 29 on the control input of the switch 29, the third curve the voltage C 30 on the control input of switch 30 and the fourth curve the voltage C 31 on the control input of switch 31.
  • Control voltages are in the form of slots, of variable width and constant height. In others terms, the control voltage is fixed and the duration of selection of switches of the third stage and therefore of the corresponding injector is variable. In addition, it is expected that only one injector is selected. at the same time and there is a time delay between two injector selections.
  • the fifth curve shows the voltage V 3 at the terminals of the injector 3
  • the sixth curve shows the voltage V 5 at the terminals of the injector 5
  • the seventh curve shows the voltage V 4 at the terminals of the injector 4
  • the eighth curve shows the voltage V 6 across the injector 6.
  • the voltage across an injector is zero as long as said injector is not selected.
  • an injector for example injector 3 it sees a voltage corresponding to the positive alternation of a sinusoidal signal or simply periodic, when the corresponding switch is passing.
  • the frequency and the sinusoidal signal voltages are fixed. However, it is advantageous, in some cases, to be able to vary the duration of activation T, and / or the frequency of the periodic signal, and / or the signal voltage periodic.
  • the voltage of source 2 is transformed via stages 7, 8 and 9, at an alternating voltage across the terminals injectors, characterized by the peak voltage V, the frequency F and the duration T, and, this for each injector.
  • the instruction received by the computer 10 can be supplied by control laws coming from another software layer or another calculator whose values depend on the condition of the vehicle, especially the engine, speed, acceleration, etc., and the type of combustion desired.
  • Interface 11 modulates the pulse width of the voltage for each injector.
  • the first curve in FIG. 3 shows the voltage V 13 at point 13, at the entrance to the first stage 7 which is here continuous.
  • the second curve in Figure 3 shows the voltage V 25 on the control input 25 of the electronic switch 23, which is in the form of slots.
  • the third curve in FIG. 3 shows the evolution of the current I 22 in the inductance 22, and the fourth curve in FIG. 3 shows the voltage V 27 at the output 27 of the second stage 8.
  • the voltage V 27 is taken by the interface 11 for supplying the resistors 32 and 33, and allowing a voltage comparison with the signal received by the computer 10.
  • the voltage V 27 supplies the injectors 3 to 6 and more precisely the injector selected by the third stage 9.
  • the parameters for controlling the voltage V 27 are the conduction angles of the switches 15 and 23.
  • the second stage 8 is designed and controlled so that the voltage V 27 is generated in the following manner.
  • the switch 23 is controlled so that when it is closed, the inductor 22 charges for a certain period, then when said switch 23 is blocked, the voltage across a selected injector describes a pulse of sinusoidal shape.
  • the peak voltage V 27 depends on the energy stored in the inductor 22 and on the voltage V 13 at the input of the second stage 8.
  • the duration of closure of the switch 15 is fixed so that the voltage V 13 at the input of the second stage 8 is maintained and the output voltage V 27 of the second stage 8 is obtained by controlling the charging time of the inductor 22.
  • the peak voltage V 27 is therefore a function of the conduction angles of the switch 23.
  • FIG. 4 where the voltage V 25 for controlling the switch 23 is represented respectively, the current I 22 in the inductor 22, the voltage V 13 at the output of the first stage 7 and at the input of the second stage 8, the voltage V 18 for controlling the switch 15 and the voltage V 27 for output from the second stage 8.
  • the voltage V 18 here has a form of regularly spaced slots which ensures, thanks to the filtering capacitor 21, a voltage V 13 of the output of the first stage 7 continues.
  • the voltage V 13 can be increased by increasing the opening times of the switch 15, and vice versa.
  • the voltage V 25 is in the form of slots of variable width and interval, which makes it possible to vary the peak value of the voltage V 27 .
  • the voltage setpoint received by the computer 10 is translated into a voltage setpoint received by the interface 11.
  • the voltage V 27 at the output of the second stage 8 is measured by the resistance divider and compared to the setpoint received by the interface 11.
  • the error is amplified by the comparator-regulator 34, the output of which is used to generate the pulse width modulation signal necessary for controlling the switch 23 of the second stage 8.
  • the function linking the peak voltage of the voltage V 27 and the reference voltage V 25 can be produced by calibration or characterization of the system for each injector. There is thus a regulation of the peak voltage of the injectors which is simple to implement, a single parameter serving to control it.
  • the voltage setpoint is variable according to the needs of the system and reflected by the computer 10 in wave form characterized by the peak excitation voltage of the piezoelectric cells injectors 3 to 6.
  • the control device 1 is equipped with means voltage control of injectors 3 to 6, namely the loops feedback and the necessary sensors, in order to voltage the injectors.
  • FIG. 5 shows a control device 1 whose three stages 7 to 9 are identical to those of FIG. 1.
  • the control device 1 comprises a frequency sensor 36 mounted on the output 27 of the second stage 8 and connected to a converter frequency / voltage 37 whose output is sent to an input of the comparator-regulator 34 whose other input is, as in the figure 1, connected to an output of the computer 10.
  • the output of the comparator 34 is sent to a module 38 which generates the control voltages of the inputs 18 and 25 of switches 15 and 23, respectively.
  • the module 38 includes a voltage controlled oscillator (VCO) 39 connected to the comparator 34 output and a width modulation element pulse 40 mounted at the output of oscillator 39 and generating said control voltages.
  • VCO voltage controlled oscillator
  • the frequency of the width modulation of pulses is included in a feedback loop of frequency allowing the device to be controlled at the frequency of desired cutting.
  • the frequency setpoint is variable depending on the system requirements and is passed on by the computer 10 in form wave characterized by the excitation frequency of the injectors.
  • the control device is equipped with means frequency control of the piezoelectric cells of injectors, namely feedback loops and sensors necessary for this feedback to ensure enslavement in frequency.
  • Excitation frequency can be higher or lower at the mechanical resonant frequency of the injectors, in order to check the quality of fuel injection.
  • the control time T can be determined by means of a counter so that the voltage excitation duration of the injectors is the injection time desired for each injector by the computer.
  • the injection time setpoint T is variable according to the needs of the system and passed on by the injectors control computer in waveform, characterized by the duration of the piezoelectric excitation injectors 3 to 6.
  • the control device 1 is then equipped with piezoelectric drive duration T control means injectors, i.e. feedback loops and sensors required for feedback.
  • the invention makes it possible to control the quantity of fuel injected by electrical control parameters across the injectors whose fuel flow characteristics are dependent said control parameters.
  • the order can be carried out by the combination of injector control means, in particular the frequency, voltage and duration of injection.
  • Control means essentially depend on the electronics topology, independently of the injectors.

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)
EP20030292209 2002-09-13 2003-09-09 Verfahren und Vorrichtung zur Steuerung eines Piezoinjektors Expired - Lifetime EP1398487B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0211383A FR2844556B1 (fr) 2002-09-13 2002-09-13 Dispositif et procede de commande d'injecteur piezo-electrique
FR0211383 2002-09-13

Publications (2)

Publication Number Publication Date
EP1398487A1 true EP1398487A1 (de) 2004-03-17
EP1398487B1 EP1398487B1 (de) 2008-06-18

Family

ID=31726051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030292209 Expired - Lifetime EP1398487B1 (de) 2002-09-13 2003-09-09 Verfahren und Vorrichtung zur Steuerung eines Piezoinjektors

Country Status (3)

Country Link
EP (1) EP1398487B1 (de)
DE (1) DE60321632D1 (de)
FR (1) FR2844556B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2879255A1 (fr) * 2004-12-14 2006-06-16 Renault Sas Procede de pilotage electronique d'un actionneur piezo-electrique ultrasonore
EP1860310A2 (de) 2006-05-23 2007-11-28 Delphi Technologies, Inc. Verfahren zum Betrieb einer Kraftstoffeinspritzdüse
WO2009060079A1 (fr) * 2007-11-08 2009-05-14 Renault S.A.S Generateur de train d'impulsion de tension, application a la commande d'injecteur piezoelectrique ultrasonore
FR2937196A1 (fr) * 2008-10-14 2010-04-16 Renault Sas Dispositif et procede de commande d'un injecteur piezoelectrique ultrasonore resonant.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2801346A1 (fr) * 1999-11-19 2001-05-25 Renault Dispositif d'injection de carburant pour moteur a combustion interne
DE10150414A1 (de) * 2000-10-12 2002-06-20 Nippon Soken Kraftstoffeinspritzsystem
US20020121958A1 (en) * 1999-09-17 2002-09-05 Walter Schrod Method and circuit for driving at least one capacitive actuator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020121958A1 (en) * 1999-09-17 2002-09-05 Walter Schrod Method and circuit for driving at least one capacitive actuator
FR2801346A1 (fr) * 1999-11-19 2001-05-25 Renault Dispositif d'injection de carburant pour moteur a combustion interne
DE10150414A1 (de) * 2000-10-12 2002-06-20 Nippon Soken Kraftstoffeinspritzsystem

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2879255A1 (fr) * 2004-12-14 2006-06-16 Renault Sas Procede de pilotage electronique d'un actionneur piezo-electrique ultrasonore
WO2006077295A1 (fr) * 2004-12-14 2006-07-27 Renault S.A.S Procede de pilotage electronique d'un actionneur piezo-electrique ultrasonore
JP4545775B2 (ja) * 2006-05-23 2010-09-15 デルファイ・テクノロジーズ・インコーポレーテッド 燃料噴射器を動作させる方法
JP2007315389A (ja) * 2006-05-23 2007-12-06 Delphi Technologies Inc 燃料噴射器を動作させる方法
EP1860310A3 (de) * 2006-05-23 2008-08-27 Delphi Technologies, Inc. Verfahren zum Betrieb einer Kraftstoffeinspritzdüse
EP1860310A2 (de) 2006-05-23 2007-11-28 Delphi Technologies, Inc. Verfahren zum Betrieb einer Kraftstoffeinspritzdüse
US7856963B2 (en) 2006-05-23 2010-12-28 Delphi Technologies Holding S.Arl Method of operating a fuel injector
WO2009060079A1 (fr) * 2007-11-08 2009-05-14 Renault S.A.S Generateur de train d'impulsion de tension, application a la commande d'injecteur piezoelectrique ultrasonore
FR2923664A1 (fr) * 2007-11-08 2009-05-15 Renault Sas Generateur de train d'impulsion de tension, application a la commande d'injecteur piozoelectrique ultrasonore.
CN101911454A (zh) * 2007-11-08 2010-12-08 雷诺股份公司 电压脉冲序列生成器、对于超声压电喷射器的控制的应用
US8847648B2 (en) 2007-11-08 2014-09-30 Renault S.A.S. Voltage pulse train generator, application to the control of an ultrasound piezoelectric injector
FR2937196A1 (fr) * 2008-10-14 2010-04-16 Renault Sas Dispositif et procede de commande d'un injecteur piezoelectrique ultrasonore resonant.
WO2010043808A1 (fr) 2008-10-14 2010-04-22 Renault S.A.S. Dispositif et procede de commande d'un injecteur piezo-electrique ultrasonore resonant
CN102216595A (zh) * 2008-10-14 2011-10-12 雷诺股份公司 用于控制谐振超声压电喷射器的装置和方法

Also Published As

Publication number Publication date
FR2844556A1 (fr) 2004-03-19
DE60321632D1 (de) 2008-07-31
EP1398487B1 (de) 2008-06-18
FR2844556B1 (fr) 2006-04-07

Similar Documents

Publication Publication Date Title
EP1248904B1 (de) Brennstoffeinspritzvorrichtung für brennkraftmaschine
FR2541379A1 (fr) Perfectionnement aux systemes d'injection a commande electromagnetique pour moteur diesel de type pression-temps ou l'aiguille de l'injecteur est pilotee par la decharge puis la charge d'une capacite
FR2771453A1 (fr) Procede et dispositif de regulation de la pression de carburant dans un accumulateur de carburant
EP1398487B1 (de) Verfahren und Vorrichtung zur Steuerung eines Piezoinjektors
FR2481749A1 (fr) Dispositif de dosage de carburant pour moteur
EP1805404A1 (de) Verfahren zum überwachen einer steuerschaltung und einer betätigungsvorrichtung
FR2497294A1 (fr) Systeme d'injection de carburant
EP1647693B1 (de) Verfahren zur Ansteuerung einer Steuerschaltung und Betätigungseinrichtung
EP1398488A1 (de) Verfahren unf Vorrichtung zur Steuerung eines Piezoinjektors
EP1398489A1 (de) Verfahren und Vorrichtung zur Steuerung eines Piezoinjektors
FR2751702A1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
WO2000063553A1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
FR2477227A1 (fr) Installation d'injection de carburant pour moteurs a combustion interne
EP1420468B1 (de) Aktuator mit elektronischer Steuerung
WO1998049443A1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
EP1528605B1 (de) Steuervorrichtung für piezoelektrische Ultraschallaktoren
WO1997015756A1 (fr) Systeme d'injection de carburant dans un moteur a combustion interne
EP2078158B1 (de) Vorrichtung zum halten einer kraftstoffeinspritznadel und zugehöriges kraftstoffeinspritzventil
FR2739142A1 (fr) Procede de controle de la richesse d'un melange air / carburant alimentant un moteur a combustion interne et dispositif correspondant
FR2879046A1 (fr) Procede de commande d'un circuit de pilotage pour des actionneurs piezostrictifs ou magnotostrictifs
WO2010069971A1 (fr) Dispositif d'injection de carburant pour moteur a injection directe de vehicule automobile
FR2877400A1 (fr) Dispositif d'injection de carburant a accumulateur servant a compenser une variabilite individuelle d'injecteurs
FR2940369A1 (fr) Dispositif d'injection de carburant pour moteur a injection directe de vehicule automobile
FR2522369A1 (fr) Dispositif de dosage de carburant dans un moteur
WO2010069973A1 (fr) Dispositif d'injection de carburant pour moteur a injection directe de vehicule automobile

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

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 RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20040617

AKX Designation fees paid

Designated state(s): DE ES GB IT

17Q First examination report despatched

Effective date: 20070608

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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 ES 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: 60321632

Country of ref document: DE

Date of ref document: 20080731

Kind code of ref document: P

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

Ref country code: ES

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: 20080929

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: 20090319

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: 20080618

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

Ref country code: GB

Payment date: 20160920

Year of fee payment: 14

Ref country code: DE

Payment date: 20160921

Year of fee payment: 14

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60321632

Country of ref document: DE

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

Effective date: 20170909

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

Ref country code: GB

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

Effective date: 20170909

Ref country code: DE

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

Effective date: 20180404