WO2003081007A1 - Procede et dispositif de detection du moment d'impact du pointeau d'une soupape de commande piezoelectrique - Google Patents

Procede et dispositif de detection du moment d'impact du pointeau d'une soupape de commande piezoelectrique Download PDF

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Publication number
WO2003081007A1
WO2003081007A1 PCT/DE2003/001006 DE0301006W WO03081007A1 WO 2003081007 A1 WO2003081007 A1 WO 2003081007A1 DE 0301006 W DE0301006 W DE 0301006W WO 03081007 A1 WO03081007 A1 WO 03081007A1
Authority
WO
WIPO (PCT)
Prior art keywords
piezo
time
voltage
impact
control valve
Prior art date
Application number
PCT/DE2003/001006
Other languages
German (de)
English (en)
Inventor
Jörg BEILHARZ
Richard Pirkl
Harald Schmidt
Peter Voigt
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP03720240A priority Critical patent/EP1488088B1/fr
Priority to DE50307324T priority patent/DE50307324D1/de
Publication of WO2003081007A1 publication Critical patent/WO2003081007A1/fr

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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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/003—Measuring variation of fuel pressure in high pressure line
    • 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
    • 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
    • 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
    • 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
    • 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
    • F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors
    • 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
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable 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
    • 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
    • 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

Definitions

  • the invention relates to a method and a device for detecting the point of impact of the valve needle of a piezo control valve of a pump-nozzle unit. Furthermore, the invention relates to a method and a device for controlling and / or regulating the operation of a piezo control valve of a pump-nozzle unit.
  • Pump-nozzle units are used to supply fuel into a combustion chamber of an internal combustion engine.
  • This can be, for example, a pump-nozzle unit with a control and / or controllable fuel pump, a fuel injection nozzle which has a nozzle needle which can be moved back and forth between a closed position and an open position, a first pressure chamber which is separated from the fuel pump a first pressure fuel can be filled, a second pressure chamber, wherein in the second pressure chamber fuel under a second pressure exerts a closing force on the nozzle needle, and a third pressure chamber that communicates with the first pressure chamber, in the third pressure chamber below a third pressure 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 injection nozzle opens as soon as an opening force which is at least influenced by the currently prevailing pressures is exerted on the nozzle needle.
  • Such pressure-controlled injection systems are used for fuel metering, fuel conditioning, shaping the injection process and sealing the fuel supply against the combustion chamber of the internal combustion engine.
  • pressure controlled Injection systems can be controlled in an advantageous manner the course of the volume flow over time during the injection. This can have a positive impact on the performance, fuel consumption and pollutant emissions of the engine.
  • the fuel pump and the fuel injection nozzle are generally designed as an integrated 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 that can be moved back and forth in a fuel pump cylinder and is driven either directly by a tappet or indirectly by rocker arm of a camshaft of the internal combustion engine.
  • the section of the fuel pump cylinder which usually forms the first pressure chamber can be connected to a low-pressure fuel region via a control valve, fuel being sucked into the first pressure chamber from the low-pressure fuel region when the control valve is open, and into the fuel from the first pressure chamber when the control valve is still open -Low pressure area is pushed back.
  • Pump injector units with a piezo control valve may experience injection quantity accuracy problems. This is due in particular to the fact that the actual closing and opening times of the piezo control valve are not known in operation. In order to keep the injection quantity spread as low as possible, the piezo actuator in the piezo control valve must be charged or discharged as precisely as possible, for example to set the start, duration and energy of a valve closing process. Furthermore, mechanical manufacturing tolerances, wear, temperature and aging processes can also lead to an undefined closing and / or opening process.
  • the invention is based on the object of specifying a method and a device with which the actual closing and / or opening times of the piezo control valve can be detected.
  • the method according to the invention for detecting the point in time at which the valve needle hits a piezo control valve of a pump-nozzle unit is characterized in that the point in time at which the valve needle hits is detected by evaluating the piezo voltage and / or the piezo current.
  • the detection of the point in time at which the valve needle strikes provides in particular feedback for the actual closing time of the piezo control valve and for the opening behavior. This feedback can be particularly advantageous for higher-level controls and / or
  • the solution according to the invention makes it possible, for example, to determine the actual start of funding. Furthermore, the running times of the piezo control valve when closing and opening can be used for more precise positioning of the valve needle and the setting of a sufficient seat force reserve is possible for the entire operating time.
  • the evaluation of the piezo voltage and / or the piezo current comprises the detection of at least one discontinuity in the course of the piezo voltage and / or the piezo current.
  • the control valve mechanism such as the pressure plate, lever and valve needle, is activated by the loading process of the piezo valve.
  • a suitable detection circuit which can be formed, for example, by a differentiator with downstream threshold value detection, makes it possible to recognize this discontinuity in the electrical measured variable.
  • the extension Evaluation of the piezo voltage and / or the piezo current includes the detection of at least one pulse in the course of the piezo voltage and / or the piezo current.
  • the control valve mechanism such as the pressure plate, lever and valve needle
  • the valve needle is so strongly accelerated by the cut-off pulse during the opening process that a mechanical force pulse occurs when it hits the piezo actuator that is already in the starting position.
  • Charge carriers are induced by the dynamic force input, which leads to a current pulse and / or a voltage pulse, for example between an output stage and the piezo actuator.
  • This pulse of the electrical measured variable can be detected with a detection circuit, which can be formed, for example, by a simple threshold value detection.
  • the timing of the valve needle detected by the method according to the invention for detecting the time of impact and / or by the device according to the invention for detecting the time of impact of the piezo control valve is related to a known temporal auxiliary variable.
  • the known auxiliary time variable can be, for example, a suitable control signal.
  • the known temporal auxiliary variable changes a control signal. that determines the start or end of a fuel injection.
  • SOI start of injection
  • the time offset between the point of impact of the valve needle and the SOI signal corresponds to the running time between the start of energization and the actual start of delivery of the pump-nozzle unit. Since a correlation of the running time to the energy introduced is possible, a seat power reserve can be determined, for example.
  • the device according to the invention for detecting the point of impact of the valve needle of a piezo control valve of a pump-nozzle unit is characterized in that it evaluates the piezo voltage and / or the piezo current to detect the point of impact of the valve needle.
  • the evaluation of the piezo voltage and / or the piezo current comprises the detection of at least one discontinuity in the course of the piezo voltage and / or the piezo current.
  • the evaluation of the piezo voltage and / or the piezo current comprises the detection of at least one pulse in the course of the piezo voltage and / or the piezo current.
  • the device according to the invention for controlling and / or regulating the operation of a piezo control valve of a pump-nozzle unit is distinguished by the fact that it uses a method according to the invention to detect the point at which the valve needle hits and / or a device according to the invention to detect the point of impact of the valve needle detected timing of the valve needle of the piezo control valve relates to a known auxiliary time variable.
  • the known temporal auxiliary variable comprises a control signal which defines the start or the end of a fuel injection.
  • the invention is based on the knowledge that signals are superimposed on the piezo voltage and / or the piezo current, which signals can be used for feedback, in particular in connection with regulations for the injection quantity correction.
  • FIG. 1 shows a schematic embodiment of a pump-nozzle unit in or with which the methods according to the invention or the devices according to the invention can be used;
  • FIG. 2 shows a schematic partial sectional view of a piezo control valve which can be used with the pump-nozzle unit according to FIG. 1;
  • FIG. 3 shows a graph which illustrates the course of the piezo voltage, the derivation of the piezo voltage and the valve needle lift for an injection
  • FIG. 4 shows a graph which illustrates the course of the piezo voltage, the piezo current and the valve needle lift in relation to a known SOI signal for a closing operation of the piezo control valve;
  • FIG. 5 shows the course of the piezo voltage for an injection process with different piezo energies
  • FIG. 6 shows a temporal section of the curves of FIG. 5 with the turn-in times of the valve needle relating to a known SOI signal during the closing process of the piezo control valve; and
  • FIG. 7 shows a graph which illustrates the course of the piezo voltage, the piezo current, the piezo charge and the valve needle lift in relation to a known EOI signal.
  • FIG. 1 shows schematically a pump-nozzle unit.
  • the pump-nozzle unit shown 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 can be moved back and forth in a fuel pump cylinder 16.
  • the fuel pump piston 14 is driven directly or indirectly via a camshaft, not shown, of the internal combustion engine.
  • the Kor ⁇ pressionsrau 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 a piezo control valve 22.
  • the piezo control valve 22 serves to either close the fuel line 20 or to connect it to a low-pressure fuel region 18 from which fuel 10 can be drawn.
  • the pump-nozzle unit shown further comprises a fuel injector, designated as a whole by 24, which moves one between a closed position and an open position. has nozzle needle 46.
  • a pressure pin 26 can in particular exert a downward force on the nozzle needle 46.
  • an adjusting disk 40 is provided, which is guided in a second pressure chamber 30 , fuel 10 in the second pressure chamber 30 having a second pressure p 30 being pressed downward via the pressure pin 26, based on the illustration in FIG directed closing force exerts on the nozzle needle 46.
  • the shim 40 is DA only as strong sealed at, preferably, over the second pressure chamber 30, that the second pressure p 3 is degraded already again o before the start of a new injection cycle.
  • a further closing force is exerted by a first spring 36 on the pressure pin 26 and thus the nozzle needle 46, the first spring 36 being arranged in the second pressure chamber 30 and having its rear end supported on the adjusting disk 40.
  • a section of the nozzle needle 46 having a shoulder 44 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 nozzle needle 46 assumes its open position as long as a difference between the p through the third pressure 32 opening force caused and the sum of the p by the second pressure 3 o generated closing force and the closing force produced by the first spring 36 exceeds a predetermined value.
  • the nozzle opening pressure can thus be influenced via the second pressure p 30 in the second pressure chamber 30.
  • a pressure limiter tion and holding valve 34 may be provided between the first pressure chamber 28 and the second pressure chamber 30.
  • the coupling of an embodiment of the device 80 according to the invention to the piezo control valve 22 explained in more detail with reference to FIG. 2 is also shown in FIG. 1.
  • FIG. 2 shows a schematic partial sectional view of a piezo control valve 22 which can be used with the pump-nozzle unit according to FIG. 1.
  • the piezo control valve 22 shown has a valve needle 48, which for
  • Closing the piezo control valve 22 in the illustrated first end position and for completely opening the piezo control valve 22 can be moved into a second end position, which is shifted to the right in relation to the illustration.
  • a valve plate 64 provided on the valve needle 48 interacts with a valve seat 62 on the housing side.
  • the low-pressure fuel region 18 is closed off from a high-pressure chamber 38, which is connected to the fuel line 20 shown in FIG. 1.
  • the piezo control valve 22 has a piezo actuator or a piezo element 76. With suitable activation of the piezo element 76, this exerts a force on a pressure piece 54 via an end face 78.
  • the pressure piece 54 in turn transmits the force generated by the piezo element 76 to a first lever 56 and a second lever 58, the first lever 56 and the second lever 58 being provided to effect a force transmission.
  • the first lever 56 and the second lever 58 rest against a second axial end surface 72 of the valve needle 48 in order to transmit the translated force generated by the piezo element 76 to the valve needle 48.
  • the translated force generated by the suitably controlled piezo element 76 which acts on the valve needle 48, is greater than an opposite force, which is generated by a second spring 66 and is exerted on a first axial end face 70 of the valve needle 48 via a spring pressure piece 68 becomes.
  • the fuel Low-pressure region 18 is connected to a control chamber 50, which is also connected via a compensating bore 52 to an actuator chamber 74 located in front of the piezo element 76.
  • This actuator chamber 74 is connected to a return 60 via which fuel can flow back from the actuator chamber 74.
  • FIG. 3 shows an example of the course of the piezo voltage u (t), the time derivative of the piezo voltage u '(t) and the valve needle stroke h (t) for an injection. Via the time derivative of the piezo voltage u '(t), for example, discontinuities in the course of the piezo voltage u (t) can be identified in a simple manner.
  • FIG. 4 shows the course of the piezo voltage u (t), the piezo current i (t) and the valve needle stroke h (t) for a closing operation of the piezo control valve.
  • the piezo control valve is actually closed.
  • the time t c corresponds to the time of impact of the valve needle 48.
  • the counterforce on the piezo actuator 76 is increased abruptly by the mechanical coupling, which directly results in a discontinuity in the piezo voltage u (t)
  • Time t c reflects. This discontinuity of the piezo voltage u (t) can be recognized, for example, by the time derivative of the piezo voltage u '(t).
  • a differentiator with a subsequent threshold value detection can therefore be used as the detection circuit.
  • the detected discontinuity of the piezo voltage u (t) at the time t c can now be assigned to a known auxiliary variable, for example an SOI signal which changes its value at the time t S o trigger the start of injection.
  • a known auxiliary variable for example an SOI signal which changes its value at the time t S o trigger the start of injection.
  • the time span between the time tsoi and the time t c corresponds to the running time between the start of energization and the actual start of delivery of the pump-nozzle unit.
  • FIG. 5 shows the course of the piezo voltage for an injection process with different piezo energies. The individual curves from top to bottom correspond to the voltage values 150 V, 140 V, 130 V, 120 V, 110 V and 100 V.
  • FIG. 6 shows a section of the curves of FIG. 5 with the turn-in times of the valve needle 48 related to a known SOI signal during the closing process of the piezo control valve 22.
  • the illustration in FIG. 6 shows that the turn-in time t c for lower piezo - tensions u (t) shifted backwards.
  • the time of impact t c ⁇ corresponds to the voltage of 150 V
  • the time of impact t c2 corresponds to the voltage of 100 V.
  • the impact times t C ⁇ and t c2 can again be related to the SOI signal.
  • FIG. 7 shows the course of the piezo voltage u (t), the piezo current i (t) and the valve needle stroke h (t), in particular also for the opening process of the piezo control valve 22. Furthermore, the charge course q (t), which is not of interest here, is shown .
  • the valve mechanism cannot follow the receding piezo actuator 76 in a force-fitting manner. Nevertheless, the valve needle 48 is so strongly accelerated by the control pulse during the opening process that a mechanical force pulse occurs at time t 0 when it hits the piezo actuator 76, which is already in its starting position. This dynamic force input induces charge carriers, which leads to a current pulse or voltage pulse between the output stage and the piezo actuator.
  • the pulse of the piezo current i (t) at time t 0 can be clearly seen in FIG.
  • the time t 0 can therefore be determined in a simple manner, for example by a threshold value acquisition.
  • the impact time t 0 at which the piezo control valve 22 is fully open, can be related in time to an EOI signal that changes its value at the time t E o ⁇ to the opening process trigger the piezo control valve 22.
  • the time span between the time t E o ⁇ and t 0 then corresponds to the running time between the start of discharge and the time when the piezo control valve 22 is completely open.
  • the invention can be summarized as follows: The detection of the point in time of the valve needle 48 of a piezo control valve 22 of a pump-nozzle unit when closing and / or opening the piezo control valve 22 is carried out according to the invention by the piezo voltage u (t) and / or piezo current i (t) can be evaluated. This evaluation can include in particular the detection of discontinuities and / or pulses in the course of the piezo voltage u (t) and / or the piezo current i (t).
  • the detected point in time of the impact can advantageously be related in time to a known auxiliary variable, in particular for control purposes.

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  • 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 du moment d'impact du pointeau (48) d'une soupape de commande piézo-électrique (22) d'une unité gicleur de pompe lors de la fermeture et/ou de l'ouverture de la soupape de commande piézo-électrique (22). A cet effet, on évalue la piézotension (u(t)) et/ou le piézocourant (i(t)). Cette évaluation peut notamment comporter l'identification de discontinuités et/ou d'impulsions dans le cours de la piézotension (u(t)) et/ou du piézocourant (i(t)). Le moment d'impact détecté peut avantageusement être mis en relation temporelle avec une grandeur auxiliaire connue (SOI, EOI), notamment à des fins de réglage.
PCT/DE2003/001006 2002-03-27 2003-03-26 Procede et dispositif de detection du moment d'impact du pointeau d'une soupape de commande piezoelectrique WO2003081007A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03720240A EP1488088B1 (fr) 2002-03-27 2003-03-26 Procede et dispositif de detection du moment d'impact du pointeau d'une soupape de commande piezoelectrique
DE50307324T DE50307324D1 (de) 2002-03-27 2003-03-26 Verfahren und vorrichtung zur detektion des einschlagzeitpunktes der ventilnadel eines piezo-steuerventils

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10213874.5 2002-03-27
DE10213874 2002-03-27

Publications (1)

Publication Number Publication Date
WO2003081007A1 true WO2003081007A1 (fr) 2003-10-02

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PCT/DE2003/001006 WO2003081007A1 (fr) 2002-03-27 2003-03-26 Procede et dispositif de detection du moment d'impact du pointeau d'une soupape de commande piezoelectrique

Country Status (3)

Country Link
EP (1) EP1488088B1 (fr)
DE (1) DE50307324D1 (fr)
WO (1) WO2003081007A1 (fr)

Cited By (25)

* 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
WO2005059338A1 (fr) * 2003-12-09 2005-06-30 Siemens Aktiengesellschaft Mode de fonctionnement d'un actionneur d'une soupape d'injection
WO2005059339A1 (fr) 2003-12-09 2005-06-30 Siemens Aktiengesellschaft Mode de fonctionnement d'un actionneur de soupape d'injection
WO2005059337A1 (fr) 2003-12-18 2005-06-30 Volkswagen Mechatronic Gmbh & Co. Kg Procede et dispositif pour reguler une soupape et procede et dispositif pour reguler un ensemble injecteur-pompe avec cette soupape
EP1551065A2 (fr) * 2003-12-11 2005-07-06 Robert Bosch Gmbh Procédé et appareil de détermination la tension de commande d'un actionneur piézoélectrique d'une soupage d'injection
WO2005066478A1 (fr) * 2004-01-12 2005-07-21 Siemens Aktiengesellschaft Procede de regulation et dispositif de regulation pour un actionneur
DE102004006558B3 (de) * 2004-02-10 2005-09-08 Siemens Ag Verfahren zur Ermittlung der benötigten Aktorenergie für die verschiedenen Einspritzarten eines Aktors einer Brennkraftmaschine
DE102004006297A1 (de) * 2004-02-09 2005-09-08 Siemens Ag Verfahren zur Steuerung eines Einspritzventils einer Brennkraftmaschine
DE102004027291A1 (de) * 2004-06-04 2006-01-12 Volkswagen Mechatronic Gmbh & Co. Kg Verfahren und Vorrichtung zum Steuern eines Ventils
DE102004029906A1 (de) * 2004-06-21 2006-01-26 Siemens Ag Verfahren und Vorrichtung zum Steuern eines Einspritzventils und Computerprogramm
DE102004063294A1 (de) * 2004-12-29 2006-07-13 Siemens Ag Verfahren und Vorrichtung zum Steuern eines Einspritzventils
DE102005032087A1 (de) * 2005-07-08 2007-01-18 Siemens Ag Verfahren und Vorrichtung zum Steuern eines Einspritzventils
WO2008071532A1 (fr) * 2006-12-12 2008-06-19 Robert Bosch Gmbh Procédé d'exploitation d'une soupape d'injection de carburant
WO2010091902A1 (fr) * 2009-02-10 2010-08-19 Robert Bosch Gmbh Procédé de détermination d'une fermeture de pointeau pour un injecteur piézoélectrique
WO2012119911A1 (fr) * 2011-03-09 2012-09-13 Continental Automotive Gmbh Procédé de détection d'éléments défectueux d'un système d'injection de carburant à régulation électronique d'un moteur à combustion interne
DE102011007393B3 (de) * 2011-04-14 2012-09-13 Continental Automotive Gmbh Verfahren zur Detektion eines Düsenraumdrucks in einem Injektor und Einspritzsystem
WO2012152552A3 (fr) * 2011-05-12 2013-01-03 Continental Automotive Gmbh Procédé de réglage d'un injecteur et système d'injection
DE102013206600A1 (de) * 2013-04-12 2014-10-16 Continental Automotive Gmbh Einspritzsystem zum Einspritzen von Kraftstoff in eine Brennkraftmaschine und Regelverfahren für ein solches Einspritzsystem
EP2899387A1 (fr) * 2014-01-21 2015-07-29 Magneti Marelli S.p.A. Procédé pour commander un actionneur électromagnétique d'un moteur à combustion interne
WO2015128187A1 (fr) * 2014-02-25 2015-09-03 Continental Automotive Gmbh Procédé et dispositif permettant de faire fonctionner une soupape, en particulier pour un système d'injection à accumulation
WO2015173039A1 (fr) * 2014-05-16 2015-11-19 Robert Bosch Gmbh Procédé de détermination de l'instant de fermeture d'un injecteur de carburant
WO2015197439A1 (fr) * 2014-06-27 2015-12-30 Continental Automotive Gmbh Procédé servant à déterminer un état d'une soupape d'injection
EP2457077A4 (fr) * 2009-07-20 2016-01-13 Univ Wayne State Système d injection de carburant multidétection et son procédé de fabrication
US9435305B2 (en) 2013-04-26 2016-09-06 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
US10746124B2 (en) 2013-04-25 2020-08-18 Continental Automotive Gmbh Method for adapting an injection quantity

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277939B1 (fr) 1987-02-04 1992-11-04 Robert Bosch Ag Dispositif d'injection de combustible
JPH06177449A (ja) * 1992-12-04 1994-06-24 Toyota Motor Corp 圧電素子駆動回路
JPH07189853A (ja) * 1993-12-27 1995-07-28 Toyota Motor Corp 燃料噴射装置
DE19835494A1 (de) 1998-08-06 2000-02-10 Bosch Gmbh Robert Pumpe-Düse-Einheit
JP2000161176A (ja) * 1998-11-30 2000-06-13 Denso Corp 圧電式制御弁
US6253736B1 (en) * 1999-08-10 2001-07-03 Cummins Engine Company, Inc. Fuel injector nozzle assembly with feedback control
US6298827B1 (en) * 2000-03-08 2001-10-09 Caterpillar Inc. Method and system to monitor and control the activation stage in a hydraulically actuated device
DE10024662A1 (de) * 2000-05-18 2001-12-06 Siemens Ag Einspritzventil mit einer Steuerschaltung und Verfahren zum Steuern eines Einspritzventils

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277939B1 (fr) 1987-02-04 1992-11-04 Robert Bosch Ag Dispositif d'injection de combustible
JPH06177449A (ja) * 1992-12-04 1994-06-24 Toyota Motor Corp 圧電素子駆動回路
JPH07189853A (ja) * 1993-12-27 1995-07-28 Toyota Motor Corp 燃料噴射装置
DE19835494A1 (de) 1998-08-06 2000-02-10 Bosch Gmbh Robert Pumpe-Düse-Einheit
JP2000161176A (ja) * 1998-11-30 2000-06-13 Denso Corp 圧電式制御弁
US6253736B1 (en) * 1999-08-10 2001-07-03 Cummins Engine Company, Inc. Fuel injector nozzle assembly with feedback control
US6298827B1 (en) * 2000-03-08 2001-10-09 Caterpillar Inc. Method and system to monitor and control the activation stage in a hydraulically actuated device
DE10024662A1 (de) * 2000-05-18 2001-12-06 Siemens Ag Einspritzventil mit einer Steuerschaltung und Verfahren zum Steuern eines Einspritzventils

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 507 (E - 1609) 22 September 1994 (1994-09-22) *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 10 30 November 1995 (1995-11-30) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 09 13 October 2000 (2000-10-13) *

Cited By (54)

* 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
EP1541840A3 (fr) * 2003-12-09 2005-08-17 Siemens Aktiengesellschaft Procédé de fonctionnement d'un actionneur pour soupape d'injection et soupape d'injection
WO2005059338A1 (fr) * 2003-12-09 2005-06-30 Siemens Aktiengesellschaft Mode de fonctionnement d'un actionneur d'une soupape d'injection
WO2005059339A1 (fr) 2003-12-09 2005-06-30 Siemens Aktiengesellschaft Mode de fonctionnement d'un actionneur de soupape d'injection
EP1551065A2 (fr) * 2003-12-11 2005-07-06 Robert Bosch Gmbh Procédé et appareil de détermination la tension de commande d'un actionneur piézoélectrique d'une soupage d'injection
EP1551065A3 (fr) * 2003-12-11 2006-03-08 Robert Bosch Gmbh Procédé et appareil de détermination la tension de commande d'un actionneur piézoélectrique d'une soupage d'injection
US7275522B2 (en) 2003-12-18 2007-10-02 Siemens Ag Method and apparatus for controlling a valve, and method and apparatus for controlling a pump-nozzle apparatus with the valve
DE10359675B3 (de) * 2003-12-18 2005-07-07 Volkswagen Mechatronic Gmbh & Co. Kg Verfahren und Vorrichtung zum Steuern eines Ventils und Verfahren und Vorrichtung zum Steuern einer Pumpe-Düse-Vorrichtung mit dem Ventil
WO2005059337A1 (fr) 2003-12-18 2005-06-30 Volkswagen Mechatronic Gmbh & Co. Kg Procede et dispositif pour reguler une soupape et procede et dispositif pour reguler un ensemble injecteur-pompe avec cette soupape
CN100394007C (zh) * 2004-01-12 2008-06-11 西门子公司 执行元件用的调节方法和调节装置
WO2005066478A1 (fr) * 2004-01-12 2005-07-21 Siemens Aktiengesellschaft Procede de regulation et dispositif de regulation pour un actionneur
DE102004006297B4 (de) * 2004-02-09 2007-05-16 Siemens Ag Verfahren zur Steuerung eines Einspritzventils einer Brennkraftmaschine
US7131429B2 (en) 2004-02-09 2006-11-07 Siemens Aktiengesellschaft Method for controlling an injection valve of an internal combustion engine
DE102004006297A1 (de) * 2004-02-09 2005-09-08 Siemens Ag Verfahren zur Steuerung eines Einspritzventils einer Brennkraftmaschine
US7318419B2 (en) 2004-02-10 2008-01-15 Siemens Aktiengesellschaft Method for determining the actuator energy required for the different injection types of an actuator of an internal combustion engine
DE102004006558B3 (de) * 2004-02-10 2005-09-08 Siemens Ag Verfahren zur Ermittlung der benötigten Aktorenergie für die verschiedenen Einspritzarten eines Aktors einer Brennkraftmaschine
DE102004027291A1 (de) * 2004-06-04 2006-01-12 Volkswagen Mechatronic Gmbh & Co. Kg Verfahren und Vorrichtung zum Steuern eines Ventils
DE102004027291B4 (de) * 2004-06-04 2009-11-26 Continental Automotive Gmbh Verfahren und Vorrichtung zum Steuern eines Ventils
US7690358B2 (en) 2004-06-04 2010-04-06 Continental Automotive Gmbh Method and device for controlling a valve
DE102004029906B4 (de) * 2004-06-21 2017-01-19 Continental Automotive Gmbh Verfahren und Vorrichtung zum Steuern eines Einspritzventils und Computerprogramm
DE102004029906A1 (de) * 2004-06-21 2006-01-26 Siemens Ag Verfahren und Vorrichtung zum Steuern eines Einspritzventils und Computerprogramm
DE102004063294A1 (de) * 2004-12-29 2006-07-13 Siemens Ag Verfahren und Vorrichtung zum Steuern eines Einspritzventils
DE102004063294B4 (de) * 2004-12-29 2006-11-16 Siemens Ag Verfahren und Vorrichtung zum Steuern eines Einspritzventils
DE102005032087A1 (de) * 2005-07-08 2007-01-18 Siemens Ag Verfahren und Vorrichtung zum Steuern eines Einspritzventils
US8483933B2 (en) 2006-12-12 2013-07-09 Robert Bosch Gmbh Method for operating a fuel injector
CN101558227B (zh) * 2006-12-12 2013-10-23 罗伯特.博世有限公司 用于运行燃料喷射阀的方法
WO2008071532A1 (fr) * 2006-12-12 2008-06-19 Robert Bosch Gmbh Procédé d'exploitation d'une soupape d'injection de carburant
JP2012517556A (ja) * 2009-02-10 2012-08-02 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング ピエゾインジェクタにおけるニードル弁閉鎖の検出方法
CN102308403A (zh) * 2009-02-10 2012-01-04 罗伯特·博世有限公司 用于在压电喷射器上确定针闭合的方法
WO2010091902A1 (fr) * 2009-02-10 2010-08-19 Robert Bosch Gmbh Procédé de détermination d'une fermeture de pointeau pour un injecteur piézoélectrique
EP2457077A4 (fr) * 2009-07-20 2016-01-13 Univ Wayne State Système d injection de carburant multidétection et son procédé de fabrication
DE102011005283B4 (de) * 2011-03-09 2013-05-23 Continental Automotive Gmbh Verfahren zur Erkennung fehlerhafter Komponenten eines elektronisch geregelten Kraftstoffeinspritzsystems eines Verbrennungsmotors
WO2012119911A1 (fr) * 2011-03-09 2012-09-13 Continental Automotive Gmbh Procédé de détection d'éléments défectueux d'un système d'injection de carburant à régulation électronique d'un moteur à combustion interne
CN103403327A (zh) * 2011-03-09 2013-11-20 大陆汽车有限公司 识别内燃机的电子调节燃油喷射系统的有故障组件的方法
KR101835558B1 (ko) 2011-03-09 2018-03-07 콘티넨탈 오토모티브 게엠베하 내연기관의 전자 조절식 연료 분사 시스템의 오류 구성요소들의 검출 방법
US9127632B2 (en) 2011-03-09 2015-09-08 Continental Automative Gmbh Method for detecting faulty components of an electronically regulated fuel injection system of an internal combustion engine
CN103403327B (zh) * 2011-03-09 2016-08-24 大陆汽车有限公司 识别内燃机的电子调节燃油喷射系统的有故障组件的方法
DE102011007393B3 (de) * 2011-04-14 2012-09-13 Continental Automotive Gmbh Verfahren zur Detektion eines Düsenraumdrucks in einem Injektor und Einspritzsystem
WO2012152552A3 (fr) * 2011-05-12 2013-01-03 Continental Automotive Gmbh Procédé de réglage d'un injecteur et système d'injection
US9651009B2 (en) 2011-05-12 2017-05-16 Continental Automotive Gmbh Control method for an injection valve and injection system
DE102013206600A1 (de) * 2013-04-12 2014-10-16 Continental Automotive Gmbh Einspritzsystem zum Einspritzen von Kraftstoff in eine Brennkraftmaschine und Regelverfahren für ein solches Einspritzsystem
DE102013206600B4 (de) * 2013-04-12 2015-08-06 Continental Automotive Gmbh Einspritzsystem zum Einspritzen von Kraftstoff in eine Brennkraftmaschine und Regelverfahren für ein solches Einspritzsystem
CN105074180A (zh) * 2013-04-12 2015-11-18 大陆汽车有限公司 用于喷射燃料到内燃机中的方法和装置
US9903294B2 (en) 2013-04-12 2018-02-27 Continental Automotive Gmbh Method and device for injecting fuel into an internal combustion engine
US10746124B2 (en) 2013-04-25 2020-08-18 Continental Automotive Gmbh Method for adapting an injection quantity
US9435305B2 (en) 2013-04-26 2016-09-06 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
US9822747B2 (en) 2014-01-21 2017-11-21 MAGNETI MARELLI S.p.A. Method to control an electromagnetic actuator of an internal combustion engine
EP2899387A1 (fr) * 2014-01-21 2015-07-29 Magneti Marelli S.p.A. Procédé pour commander un actionneur électromagnétique d'un moteur à combustion interne
WO2015128187A1 (fr) * 2014-02-25 2015-09-03 Continental Automotive Gmbh Procédé et dispositif permettant de faire fonctionner une soupape, en particulier pour un système d'injection à accumulation
US10280867B2 (en) 2014-02-25 2019-05-07 Continental Automotive Gmbh Injection valve for an accumulator injection system
WO2015173039A1 (fr) * 2014-05-16 2015-11-19 Robert Bosch Gmbh Procédé de détermination de l'instant de fermeture d'un injecteur de carburant
WO2015197439A1 (fr) * 2014-06-27 2015-12-30 Continental Automotive Gmbh Procédé servant à déterminer un état d'une soupape d'injection
KR101836034B1 (ko) 2014-06-27 2018-04-19 콘티넨탈 오토모티브 게엠베하 분사 밸브의 상태를 결정하기 위한 방법
US10167802B2 (en) 2014-06-27 2019-01-01 Continental Automotive Gmbh Method for injection valves

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