EP2478200B1 - Procédé et système de détection de mouvement d'une aiguille d'un injecteur de carburant - Google Patents

Procédé et système de détection de mouvement d'une aiguille d'un injecteur de carburant Download PDF

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Publication number
EP2478200B1
EP2478200B1 EP10754910.7A EP10754910A EP2478200B1 EP 2478200 B1 EP2478200 B1 EP 2478200B1 EP 10754910 A EP10754910 A EP 10754910A EP 2478200 B1 EP2478200 B1 EP 2478200B1
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EP
European Patent Office
Prior art keywords
pressure
time
nozzle needle
profile
variable
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Active
Application number
EP10754910.7A
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German (de)
English (en)
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EP2478200A1 (fr
Inventor
Holger Rapp
Wolfgang Stoecklein
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing
    • 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
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F02D2200/0604—Estimation of fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0618—Actual fuel injection timing or delay, e.g. determined from fuel pressure drop
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • 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
    • F02M2200/247—Pressure sensors

Definitions

  • the invention relates to a method and an arrangement for determining a time point at which a nozzle needle arranged in an injection valve makes a change in movement.
  • the opening duration of a nozzle needle influences an injected fuel quantity. This opening duration results indirectly from the activation duration or energization duration of the actuator interacting with the fuel injector, for example a magnetic or piezoactuator, and the dynamic behavior of a high-pressure hydraulic system of the injection nozzle.
  • common-rail injectors for the diesel injection actuated by the actuator switching valve is designed as a servo valve.
  • the opening duration of the nozzle needle is additionally influenced by the dynamic behavior of the high-pressure hydraulics.
  • the injected fuel quantity is also dependent on the opening duration of the nozzle needle.
  • deviations from component properties and variable boundary conditions during operation can lead to deviations, which changes the opening and closing time of the nozzle needle. So is to be mentioned as an influence of the wear of the components, but also manufacturing tolerances and pressure waves within the injection system, etc., can affect the function.
  • an injector in which a pressure sensor is arranged in the nozzle chamber.
  • the pressure starts to decrease, the start of injection is recognized, when the pressure starts to increase, the end of injection is detected.
  • This injector has a sensor for detecting the opening movement and / or the closing movement of a nozzle needle, which is designed as a piezoelectric or micromechanical acceleration sensor.
  • the sensor is preferably arranged in the region of the injector head parallel or transverse to the longitudinal axis of the injector. It is particularly advantageous if the at least one sensor of the sensor module does not have direct contact with the high-pressure fuel, for example in the injector inlet and / or pressure chamber of the injector, and the measurement by the injector body and / or the nozzle body and / or through the injector plug.
  • high-pressure tightness problems and high-pressure strength problems of the injector design can be avoided. Any delays in detecting the time-varying operating parameters can also be compensated.
  • a method for determining a predetermined position of an armature in a solenoid valve is in the document DE 10 2007 031 552 A1 described.
  • the armature can be converted by reducing a current through a solenoid of the solenoid valve with an output current from a predetermined starting position in the predetermined position.
  • a detection of a time at which the armature occupies a certain position can be based on the time course of the measured current intensity of the current through the magnetic coil during the predetermined period of time.
  • a nozzle seat wear typically changes the opening timing and opening phase of the nozzle needle with the servo valve and high pressure hydraulics unchanged. If z. B. lifts the nozzle needle later or slower from the nozzle seat, it is at the time of reversal, when the servo valve closes again, have performed a smaller stroke. Consequently, when closing, it will inevitably reach the nozzle seat sooner. Thus, a delayed opening of the needle also results in premature closure. Since the injected fuel quantity depends directly on the opening duration of the needle, there is thus significant influence of an injected fuel quantity. The influence of pressure waves on the injected fuel quantity is based at least in part on a changed opening time of the nozzle needle. Another influence is the injection pressure available during injection.
  • the closing time of the nozzle needle of the injection valve can be detected by qualitative sensing of the pressure in the control chamber.
  • an injected fuel quantity can be accurately determined, since not only the inaccuracies of the servo valve but of the entire switching chain of the injection valve or injector can be corrected. It is possible to compensate for the specimen scattering of similar injection valves as well as their drift over the life and the influence of variable boundary conditions, such. B. pressure oscillations in the line.
  • the method can be implemented in a simple manner, since the operating principle of the invention is typically based on purely qualitative feature detection, by means of which both the opening and the closing of the nozzle needle can be detected.
  • the invention is applicable to injectors with solenoid valves and piezo actuators.
  • the course of the pressure is proportional to the voltage applied to the piezoelectric element. Consequently, the minimum to be determined also occurs at a zero or a zero crossing of a pressure gradient and thus the first time derivative of the course of the pressure.
  • the pressure gradient is usually proportional to the current flowing through a piezoelectric element.
  • the arrangement described is designed to carry out all the steps of the presented method.
  • individual steps of this method can also be carried out by individual components of the arrangement.
  • functions of the arrangement or functions of individual components of the arrangement can be implemented as steps of the method.
  • steps of the method may be realized as functions of individual components of the device or the entire device.
  • FIG. 1 shows a schematic sectional view through an injection valve designed as a solenoid valve injector 2.
  • This injection valve 2 comprises an injector 4, in which a valve piston 6 is arranged, which is guided at an upper end in a valve piece 8 and the lower end in the direction of a nozzle 10 extends.
  • a nozzle needle 11 is connected to the valve piston 6 and disposed within the nozzle 10.
  • the valve piston 6 is connected to a high-pressure bore 12 and a return bore 14.
  • a magnetic head 16, an armature assembly 18, and a return 20 are disposed.
  • the injection valve 2 is further connected via an electrical connection 22 to an electrical energy source and via a high-pressure or high-pressure port 23, which comprises a rod filter, with a fuel supply line.
  • FIG. 1 also shows a control chamber 24 of the injection valve. 2
  • the magnetic head 16 When operating the injection valve 2, it is provided that the magnetic head 16 is energized, whereby the armature group 18 is moved toward the magnetic head. This opens the connection between the control chamber 24 above the valve piston 6 and the return 20. This triggers a decrease in the pressure in the control chamber 24 and thus an opening movement of the composite of valve piston 6 and nozzle needle 11. By opening the nozzle needle 11 is the Connection made between the high-pressure bore 12 and the spray holes of the nozzle 10, whereby fuel is conveyed to the nozzle 10 and injected into a cylinder of an internal combustion engine.
  • FIG. 2 Details of such an injection valve 2 or injector are in FIG. 2 shown schematically.
  • a control chamber 24 is shown, which is bounded by an inner wall of the valve piece 8 and arranged within the valve piece 8 valve piston 6.
  • FIG. 2 shows the control chamber 24 of the injection valve 2 in the idle state.
  • the control chamber 24 is connected via an inlet throttle 26 with the high-pressure port for providing fuel, which is under rail pressure, and via a switchable outlet throttle 28 with the return 20 of the injection valve 2.
  • the flow through the outlet throttle 28 is blocked in the idle state by a switching valve, not shown here, and is released by activation of the switching valve.
  • the pressure within the control chamber 24 causes a downwardly, ie in the closing direction of the nozzle needle 11, directed force on the valve piston 6, which forwards this force to the nozzle needle 11.
  • an opening force determined by the pressure field under the nozzle needle 11 acts on the nozzle needle 11.
  • the pressure in the control chamber 24 is set in this time interval such that a force balance exists between the opening and closing force.
  • the pressure in the control chamber 24 thus reflects the opening force of the nozzle needle 11 again.
  • the injection valve 2 is always dimensioned so that in this case prevails in the control chamber 24, a pressure which is smaller than the rail pressure.
  • a first diagram 30 and a second diagram 32 are shown.
  • the first diagram 30 comprises a vertically oriented axis 34, along which a pressure in the control chamber 24 in the unit bar is plotted over a horizontally oriented axis 36 for the time in milliseconds.
  • a vertically oriented axis 38 is plotted over the horizontally oriented axis 36 for time in microns.
  • a curve for a pressure 40 within the control chamber 24 is shown.
  • a curve for a stroke 42 of the nozzle needle 11 is shown in the second diagram 32 in synchronism.
  • the two diagrams 30, 32 show that opening and closing as a change in movement of the nozzle needle 11 to the pressure 40 within the control chamber 24 effects.
  • the pressure 40 at the beginning of opening the nozzle needle 11 shows a first minimum 44 formed as a minimum.
  • the pressure 40 has a second minimum 46 formed as a minimum.
  • the pressure 40 in the control chamber 24 consequently has the minimum at the time of opening of the nozzle needle 11.
  • the pressure 40 is immediately before the closing time of the nozzle needle 11 because of the then low pressure under the nozzle seat significantly smaller than the rail pressure.
  • the pressure 40 in the control chamber 24 also has a pronounced minimum at the time of closing the nozzle needle 11.
  • FIG. 4 schematically shows, in the wall of the control chamber 24, usually in the region of the fixed valve member 8, a small piezoelectric element 48 is arranged, which serves as a sensor. Electrical connections 50 of the piezoelectric element 48 are led out to the rear into the low-pressure region of the injection valve 2. Furthermore, the two terminals 50 are connected to externally accessible plug contacts.
  • the piezoelectric element 48 provides a voltage 52 which, less an offset voltage, is proportional to the pressure 40 in the control chamber 24. The offset voltage is variable over time, but is only subject to significantly slower fluctuations than is the case with the pressure 40 in the control chamber 24.
  • the opening and / or closing of the nozzle needle 11 is detected in each case over a minimum in the course of the output from the piezoelectric element 48 voltage 52.
  • a sealing of the control chamber 24 in the region of the piezoelectric element 48 for low pressure can be done by applying technologies that are suitable for products with electrical actuators in the high pressure region, eg. B. CRI3.3i the Robert Bosch GmbH, known, for. B. by Glaseinschmelzonne for performing electrical contacts and the like.
  • the voltage 52 which emits the piezoelectric element 48 in the idle state, can be set to zero via a leakage resistance between the supply lines to the piezoelectric element 48 independently of the rail pressure.
  • the bleeder resistor can be arranged in the injection valve 2, in a control unit 54, which is used in the context of the method as an evaluation and a voltage measuring device and an ammeter, or in a supply line between the controller 54 and the piezoelectric element 48. If required, the bleeder resistor can also be connected to a voltage source present in the control unit 48, so that the quiescent voltage of the piezoelectric element 48 can be set to any desired value, for example the voltage of this voltage source.
  • An electrode of the piezoelectric element 48 may be connected in the injector or the injection valve 2 to the injector body 4 or injector housing and thus to the mass of the vehicle. In this case, only one sensor line is led out of the injection valve 2 and evaluated their electrical potential to ground.
  • the piezoelectric element 48 may also be terminated via a low-resistance resistor, so that, instead of the voltage 52 U, the current I output by the piezoelectric element 48 is evaluated.
  • This current is equal to the gradient of the charge on the electrodes of the piezoelectric element 48 and thus proportional to the pressure gradient dp / dt in the control chamber.
  • the opening and closing time of the nozzle needle 11 always go in this case with a sign reversal of the output from the piezoelectric element 48 current. This current zero crossing is then detected in each case.
  • the piezoelectric element 48 may be formed in a single-layer technique, similar to a Zündpiezo a lighter, particularly advantageous in connection with the evaluation of the voltage 52, or in multilayer technology particularly advantageous in connection with the evaluation of the current.
  • injection valve 2 embodied as a solenoid valve injector. But it can also be used for piezo injectors.

Claims (8)

  1. Procédé de détection d'un moment auquel un pointeau (11) disposé dans une soupape d'injection (2) effectue un changement de mouvement, dans lequel une grandeur donnant des informations sur la courbe d'une pression (40) régnant dans la chambre de commande (24) est mesurée directement à l'aide d'un capteur dans une chambre de commande (24) de la soupape d'injection (2), caractérisé en ce que l'on calcule à partir de la grandeur caractérisant la courbe de la pression (40) à quel moment la courbe présente un minimum (44, 46) et ce moment permettant d'identifier le moment de l'ouverture du pointeau (11).
  2. Procédé selon la revendication 1, dans lequel le changement de mouvement examine la présence ou non d'une fermeture du pointeau (11) et dans lequel le moment auquel se produit un minimum est déterminé comme étant une fermeture.
  3. Procédé selon l'une quelconque des revendications 1 à, 2, dans lequel la grandeur est mesurée à l'aide d'un capteur disposé dans la chambre de commande (24) et prenant la forme d'un élément piézoélectrique (48).
  4. Procédé selon l'une quelconque des revendications 1 à 3, dans lequel la grandeur mesurée est une tension (52) régnant au niveau de l'élément piézoélectrique (48), la courbe de la pression (40) étant déterminée à partir de la tension (52) et la présence d'un minimum étant examinée.
  5. Procédé selon l'une quelconque des revendications 1 à 3, dans lequel la grandeur mesurée est un courant traversant l'élément piézoélectrique (48) et dans lequel l'on calcule à partir de celui-ci un gradient de la pression (40) régnant dans la chambre de commande (24) et qu'une courbe du gradient permet d'examiner la présence d'un passage à zéro.
  6. Agencement de détection, d'un moment auquel un pointeau (11) disposé dans une soupape d'injection (2) effectue un changement de mouvement, l'agencement comprenant un capteur et un dispositif d'analyse, le capteur étant réalisé pour mesurer directement dans une chambre de commande (24) de la soupape d'injection (2) une grandeur donnant des informations sur une courbe d'une pression régnant dans une chambre de commande (24), caractérisé en ce que le dispositif d'analyse est réalisé pour déterminer à partir de la grandeur de la courbe de la pression (40) à quel moment la courbe comporte un minimum et pour identifier ce moment comme le moment de l'ouverture.
  7. Agencement selon la revendication 6, comportant comme grandeur pour mesurer la pression (40) un élément piézoélectrique (48) monocouche et un appareil de mesure de tension, l'appareil de mesure de tension étant réalisé pour mesurer une tension (52) régnant au niveau de l'élément piézoélectrique (48) et le dispositif d'analyse étant réalisé pour déterminer la courbe de la pression (40) à l'aide de la tension (52) mesurée.
  8. Agencement selon la revendication 6, comportant un élément piézoélectrique (48) à plusieurs couches et un appareil de mesure de courant pour mesurer un gradient de pression prenant la forme d'une grandeur, l'appareil de mesure de courant étant réalisé pour mesurer un courant traversant l'élément piézoélectrique (48) et le dispositif d'analyse étant réalisé pour déterminer une courbe d'un gradient de pression à l'aide du courant mesuré.
EP10754910.7A 2009-09-17 2010-09-08 Procédé et système de détection de mouvement d'une aiguille d'un injecteur de carburant Active EP2478200B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009029549A DE102009029549A1 (de) 2009-09-17 2009-09-17 Verfahren zum Bestimmen eines Zeitpunkts
PCT/EP2010/063185 WO2011032873A1 (fr) 2009-09-17 2010-09-08 Procédé et dispositif pour déterminer un mouvement d'une aiguille d'un d'injecteur

Publications (2)

Publication Number Publication Date
EP2478200A1 EP2478200A1 (fr) 2012-07-25
EP2478200B1 true EP2478200B1 (fr) 2015-04-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10754910.7A Active EP2478200B1 (fr) 2009-09-17 2010-09-08 Procédé et système de détection de mouvement d'une aiguille d'un injecteur de carburant

Country Status (5)

Country Link
EP (1) EP2478200B1 (fr)
CN (1) CN102575607B (fr)
DE (1) DE102009029549A1 (fr)
IN (1) IN2012DN00278A (fr)
WO (1) WO2011032873A1 (fr)

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DE102014204098A1 (de) 2014-03-06 2015-09-10 Robert Bosch Gmbh Verfahren zur Regelung eines Common-Rail-Injektors
DE102014209823B4 (de) * 2014-05-23 2016-03-31 Continental Automotive Gmbh Verfahren zur Bestimmung der Schließcharakteristik des Steuerventils eines Piezo-Servoinjektors
DE102014210561A1 (de) * 2014-06-04 2015-12-17 Robert Bosch Gmbh Verfahren zur Steuerung von Mehrfacheinspritzungen insbesondere bei einem Kraftstoff-Einspritzsystem einer Brennkraftmaschine
DE102014213202A1 (de) 2014-07-08 2016-01-14 Robert Bosch Gmbh Außenöffnendes Ventil, das insbesondere für Anlagen an Brennkraftmaschinen dient
DE102014221706A1 (de) 2014-10-24 2016-04-28 Robert Bosch Gmbh Verfahren zur Bestromung eines Magnetventils eines Kraftstoffinjektors
DE102014226179A1 (de) 2014-12-17 2016-06-23 Robert Bosch Gmbh Verfahren zum Regeln eines Kraftstoffinjektors
JP6237655B2 (ja) * 2015-01-15 2017-11-29 トヨタ自動車株式会社 燃料噴射量制御装置の監視装置
DE102015202876A1 (de) * 2015-02-18 2016-08-18 Robert Bosch Gmbh Ventileinrichtung
DE102015206128A1 (de) * 2015-04-07 2016-10-13 Robert Bosch Gmbh Verfahren zum Betreiben eines Kraftstoffinjektors
GB201511007D0 (en) * 2015-06-23 2015-08-05 Delphi Int Operations Lux Srl Nozzle assembly with adaptive closed signal
DE102015212085B4 (de) * 2015-06-29 2017-10-19 Continental Automotive Gmbh Verfahren und Vorrichtung zur Ermittlung des minimalen hydraulischen Spritzabstandes eines Piezo-Servo-Injektors
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DE102018218229A1 (de) 2018-10-24 2020-04-30 Robert Bosch Gmbh Verfahren zum Ermitteln einer Ladungskonstante
DE102021205381A1 (de) 2021-05-27 2022-12-01 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Charakterisieren von Kraftstoff
DE102022205734A1 (de) 2022-06-07 2023-12-07 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Ansteuerung eines Injektors, Steuergerät
DE102022211245A1 (de) 2022-10-24 2024-04-25 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Ermitteln eines oder mehrerer charakteristischer Zeitpunkte einer Kraftstoffeinspritzung

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DE102007008617A1 (de) * 2007-02-22 2008-08-28 Robert Bosch Gmbh Injektor mit Sensormodul sowie Einspritzsystem
DE102007031552A1 (de) 2007-07-06 2009-01-08 Robert Bosch Gmbh Verfahren zum Ermitteln einer Position eines Ankers in einem Magnetventil und Vorrichtung zum Betreiben eines Magnetventils mit einem Anker
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RU198569U1 (ru) * 2020-02-25 2020-07-16 Общество с ограниченной ответственностью Управляющая компания "Алтайский завод прецизионных изделий" Устройство для определения быстродействия электромагнитного актуатора топливной форсунки

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DE102009029549A1 (de) 2011-03-24
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IN2012DN00278A (fr) 2015-05-08
CN102575607B (zh) 2015-06-24
WO2011032873A1 (fr) 2011-03-24

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