EP2857662A1 - Verfahren zur Bestimmung der optimalen Zeitverzögerung zwischen einem Betätigungsbefehl und einem Testbefehl eines beweglichen Verschlusses eines Magnetventils - Google Patents

Verfahren zur Bestimmung der optimalen Zeitverzögerung zwischen einem Betätigungsbefehl und einem Testbefehl eines beweglichen Verschlusses eines Magnetventils Download PDF

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Publication number
EP2857662A1
EP2857662A1 EP14187253.1A EP14187253A EP2857662A1 EP 2857662 A1 EP2857662 A1 EP 2857662A1 EP 14187253 A EP14187253 A EP 14187253A EP 2857662 A1 EP2857662 A1 EP 2857662A1
Authority
EP
European Patent Office
Prior art keywords
delay
solenoid valve
control
shutter
fuel
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.)
Withdrawn
Application number
EP14187253.1A
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English (en)
French (fr)
Inventor
Thibault Fouquet
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.)
Valeo Systemes de Controle Moteur SAS
Original Assignee
Valeo Systemes de Controle Moteur 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 Valeo Systemes de Controle Moteur SAS filed Critical Valeo Systemes de Controle Moteur SAS
Publication of EP2857662A1 publication Critical patent/EP2857662A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2464—Characteristics of actuators
    • 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
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • 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
    • F02D2041/2037—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit for preventing bouncing of the valve needle
    • 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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2438—Active learning methods
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F2007/1894—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings minimizing impact energy on closure of magnetic circuit

Definitions

  • the invention relates to a method for determining an optimum time delay between an actuation command of a movable shutter of a solenoid valve and a test command of this shutter.
  • the method includes applying a control current to move the pump inlet valve from one to a second position, maintaining the valve in the second position for a first period of time, and applying of a control current in a second period of time after the first period upon a movement of the valve from the second position to the first position, the application of the control current in the second period comprising the progressive decrease control current to reduce the impact noise when the intake valve returns to its first position.
  • a disadvantage of such a control method is that the efficiency of the reduction of the noise of the impact of the valve depends on parameters related for example to the controlled high pressure pump model, which makes this noise reduction is random .
  • the present invention aims in particular to remedy this drawback.
  • the subject of the invention is therefore a method for determining an optimum time delay between an actuation command for a movable shutter of a solenoid valve and a test command for this shutter, the method comprising the step of determining this delay time. optimal by varying, during an iteration, a delay between the actuation command and the test command.
  • the invention it is possible to determine an optimal time delay between an actuation command of a movable shutter of a solenoid valve and an optimal test command, which can be determined at any time, this time. which makes it possible to control a solenoid valve by using a precise timing and adapted to its intrinsic and operating characteristics.
  • the invention makes it possible in particular to avoid using the use of a predetermined time delay, for example during tests in laboratory or during the manufacture of all including the solenoid valve, predetermined time that would not be optimal for all the solenoid valves of a range or series.
  • the failure may correspond to an overpressure of the fuel generated by the solenoid valve, relative to a desired pressure. Such overpressure is easily detectable.
  • the desired pressure may be a stored pressure, for example in a computing unit, in particular in a control unit of an engine.
  • This step allows you to simply deduce the value of the optimal delay with respect to the delay that generated the failure.
  • the first timer can be a stored value.
  • the delays may be shorter and shorter, for example less a stored iteration constant, the iteration constant being, for example, ten microseconds.
  • the optimal time delay can be equal to the failure delay plus an adjustment constant.
  • the adjustment constant can be a stored value.
  • the adjustment constant may be equal to a multiple of the iteration constant, the multiple being for example equal to one, in particular between five and fifty. Such an adjustment constant makes it possible to determine the optimal delay as being a delay as used during the iteration, before the appearance of the failure.
  • the actuation command and the test command can be carried by control current pulses of the solenoid valve.
  • the actuation command and the test command can be carried by electrical signals of different shapes, for example the actuation command can be carried by a pulse of a first maximum amplitude and a first duration, and the command test can be carried by a pulse of a second maximum amplitude and a second duration.
  • the second maximum amplitude may be less than the first maximum amplitude. Such a second amplitude will not have the effect of actuating the shutter of the solenoid valve, but only to maintain it in position or to slow down its stroke.
  • the characteristics of the test control can be chosen such that the test control will not have the effect of actuating the shutter of the solenoid valve, but only to keep it in position or to slow down its travel.
  • the second duration may be greater than the first duration. Such a second duration makes it possible to generate a failure at least when the time delay between the actuation command and the test command is too small compared to the first delay.
  • the test command may be carried by a signal of predetermined duration and / or amplitude chosen to allow generation of a failure at least when the delay is zero. Such a condition makes it possible to guarantee the occurrence of a failure at least when the actuation and test commands are contiguous.
  • the solenoid valve can be used in a dispensing device for dispensing fuel into cylinder injectors of a heat engine.
  • the solenoid valve is arranged to be used for the direct injection of gasoline into cylinders of a heat engine.
  • the solenoid valve may be arranged to allow fuel to enter or exit a compression chamber in the absence of actuation control, and to allow fuel only to enter said chamber upon command. actuating.
  • the solenoid valve may be arranged to allow fuel to enter or exit a compression chamber upon actuation control, and to allow fuel only to enter said chamber into the chamber. absence of actuation control.
  • the dispensing device may comprise a distribution manifold arranged to distribute the fuel in the injectors.
  • the distribution manifold may include a pressure sensor for measuring the fuel pressure in the distribution manifold.
  • the dispensing device may comprise a compression chamber arranged to compress fuel circulating towards the distribution manifold.
  • the dispensing device may comprise a piston movable in translation, the piston being arranged to compress the fuel in the compression chamber.
  • the failure can be detected by measuring the fuel pressure in the distribution manifold.
  • the piston can perform a periodic movement, and the fuel pressure measurement can be performed at least once per period, for example once every ten periods, especially once every 20 periods. Thus, any overpressure will be detected as soon as it appears, which makes it possible to prevent the implementation of the invention from generating excessive overpressure in the distribution ramp.
  • the fuel pressure measurement can be performed each time the piston moves from the top dead center to the bottom dead center.
  • High dead center means the position of the piston when the volume of the compression chamber is minimum and low dead center means the position of the piston when the volume of the compression chamber is maximum.
  • the failure may be a fuel overpressure measured in the distribution manifold.
  • Such overpressure is particularly easy to cause, especially when a sufficiently short time delay with respect to the first timer is applied between the actuation command and the test command.
  • the failure may be a fuel underpressure measured in the distribution manifold.
  • the solenoid valve may be a solenoid valve of a high pressure pump for dispensing fuel in a distribution manifold of a heat engine.
  • Such a method makes it possible to improve the accuracy and reliability of the control of a moving shutter, particularly when the control uses a timer.
  • the delay can be predetermined for example in the integration of the solenoid valve. This predetermined time delay may not be suitable for all solenoid valves and / or need to be reevaluated according to the conditions of use of the solenoid valve.
  • Such a method thus makes it possible to determine an optimal time delay and to control the solenoid valve with a more precise time delay than that used before the determination.
  • the method may include the step of determining the optimal timing if at least one predetermined condition is met.
  • the solenoid valve may be a solenoid valve of a high pressure pump for dispensing fuel into cylinder injectors of a heat engine.
  • Such a command allows to operate the shutter while reducing the noise generated by the shutter when it arrives in the opposite position to that it left before the actuation command.
  • the braking control makes it possible to reduce the speed of the shutter before it reaches a stop against a stop.
  • Such a condition on the stabilized operating point makes it possible to more easily detect a failure.
  • Such conditions on a time elapsed since the last determination step or on an event coming to an end have the effect of making it possible to regularly determine the optimal timing and to improve the control method of the shutter.
  • the engine can be controlled by a motor control unit, the one or one of the predetermined conditions can be a manual action, for example relayed by information from the engine control unit.
  • the operating point can be characterized by a stable engine speed and a pressure setpoint of the stable distribution ramp. These conditions have the effect of facilitating the detection of an overpressure in the distribution ramp.
  • the speed and the setpoint can be memorized.
  • the operating point can be chosen so that the gradient of the engine speed is lower than a memorized value. Such a condition makes it possible to have a stabilized operating point and thus to avoid that the implementation of the method for determining an optimal time delay gives rise to operating problems.
  • the operating point can be chosen so that the high pressure pump pumps a small amount of fuel with respect to its maximum pumping capacity.
  • maximum pumping capacity is meant the amount of fuel pumped in a pumping cycle, that is, when the pump goes from bottom dead center to top dead center.
  • the set point can be set so that the actuation command is initiated so that the high pressure pump pumps a small amount of fuel with respect to its maximum capacity, for example a fuel quantity less than 50% of the capacity of the pump, in particular less than 30%. Such a set point facilitates the occurrence of a measured pressure failure in the mixing chamber.
  • the engine speed can be determined so that it is likely to compensate for the noise generated by the solenoid valve, for example the engine speed being greater than 400 revolutions per minute, in particular greater than 700 revolutions per minute.
  • the actuation command and the brake command can be carried by control current pulses of the solenoid valve.
  • the actuation command and the brake control can be carried by electrical signals of different shapes, for example the actuation command can be carried by a pulse of a first maximum amplitude and a first duration, and the command braking can be carried by a pulse of a third maximum amplitude and a third duration.
  • the third maximum amplitude may be less than the first maximum amplitude.
  • the first amplitude can be chosen to be able to cause the displacement of the shutter from the position in which it is in the absence of any control of the solenoid valve to the opposite position.
  • the third amplitude can be chosen to be able to slow down the displacement of the shutter.
  • the third duration may be greater than the first duration.
  • the third duration may be less than or equal to the first duration.
  • the control unit may be the engine control unit.
  • the control unit can be adapted to control the movable shutter of the solenoid valve according to the optimal time delay.
  • the high pressure pump 3 is connected to the ramp 5 via a valve 10.
  • This valve 10 comprises a nonreturn valve 23, to allow the circulation of the fuel only in the direction from the pump 3 to the ramp 5.
  • the ramp 5 comprises a pressure sensor 7 for measuring the fuel pressure in the ramp 5, the pressure sensor 7 being connected to the engine control unit 25 so that the unit 25 is able to measure the pressure fuel 5 inside the ramp 5.
  • the ramp 5 is connected to the engine through four orifices 8 each opening into a not shown injector. Each injector is connected to a cylinder 6. These injectors allow the injection of fuel into the cylinders 6 of the engine 2.
  • bottom dead center is meant the configuration of the pump 3, when the piston 12 is in its furthest position with respect to the valve 13, that is to say when the volume of the compression chamber 15 is maximum.
  • top dead center the configuration of the pump 3 when the piston 12 is in its position closest to the valve 13, that is to say when the volume of the compression chamber 15 is minimal.
  • the piston 12 is movable in translation and is arranged to compress the fuel in the compression chamber 15.
  • the solenoid valve 4 is arranged to allow the fuel to enter or exit a compression chamber 15 in the absence of actuation control, and to allow the fuel only to enter the chamber 15 when an actuation command.
  • the solenoid valve 4 is connected to the motor control unit 25 so that the unit 25 is able to control the electromagnet 18 of the solenoid valve 4 for moving the movable shutter 16.
  • valve 13 prevents the fuel from circulating from the compression chamber 15 to the inlet 11 and the valve 13 allows the fuel to flow from the inlet 11 to the compression chamber 15.
  • the piston 12 is then able to introduce fuel from the inlet 11 to the compression chamber when it passes from the top dead center to the bottom dead center.
  • the piston 12 is also able to compress the fuel in the compression chamber 15 when it passes from the bottom dead center to the top dead center.
  • the fuel thus compressed by the piston 12 flows from the compression chamber 15 to the distribution ramp 5.
  • FIG. 3 We have shown figure 3 the different steps of a method for determining an optimum time delay between an actuation command 103 of the movable shutter 16 of the solenoid valve 4 and a test control 105 of this shutter, this method according to the invention being implemented by the engine control unit 25.
  • this optimal delay is used for a method of controlling the movable shutter 16 of the solenoid valve 4.
  • the method starts at step 101. It comprises step 108 of determining this optimal delay by varying, during an iteration 110, a delay 104 between the operation command 103 and the test command 105.
  • step 102 the method determines the timing Tn of timing to be used for timing 104 between the operation command 103 and the test command 105 during the current iteration 110.
  • the first duration Tn of the iteration 110 is an initial value Ti stored in the control unit of the motor 25. This initial value Ti is chosen so that the test command 105 is sufficiently far away from the actuation command 103 so that the shutter 16 has had time to return to the position in which the valve 13 opens the orifice 14.
  • the method comprises the step 109 of continuing the iteration 110 until the occurrence of a failure generated by the solenoid valve 4.
  • the step 106 tests the possible presence of the failure.
  • iteration 110 terminates and the process proceeds to step 108 which will be described hereinafter.
  • the failure is an overpressure of the fuel generated by the solenoid valve 4, relative to a desired pressure, which is a value stored in the control unit of an engine 25.
  • step 106 the engine control unit 25 measures the fuel pressure in the delivery manifold 5 with the aid of the pressure sensor 7.
  • the piston 12 makes a periodic movement, and the step 106 is carried out at the same time. less once per period. In other words, an iteration 110 is performed once per period of movement of the piston 12.
  • the method comprises step 108 of determining the optimal timing as a function of the time delay that generated the failure.
  • the timers 104 are shorter and shorter.
  • the delay time Tn is decreased by Tn / 20 at each iteration. This value is chosen to accurately and quickly determine the optimal delay.
  • the optimal delay is equal to the failure delay plus an adjustment constant stored in the motor control unit 25.
  • This adjustment constant is equal to 3 x (Tn / 20). This constant is chosen to be sufficiently far from the time delay that generated the failure to allow a tolerance with respect to the different elements composing the system 1 and the conditions of use.
  • the curve of the figure 5 thus corresponds to the first iteration of the method of determining the optimal delay.
  • the figure 6 is a curve representing another electrical signal used to control the solenoid valve 4, the delay being of a duration Tn less than that of the figure 5 .
  • the curve of the figure 5 corresponds, for example, to the iteration of the process that generated the failure.
  • the actuation command and the test command are carried by electrical signals, respectively 301 and 302, of different shape.
  • the actuation command is carried by a pulse 301 of a first maximum amplitude A1 and a first duration D1.
  • the test command is carried by a pulse of a second maximum amplitude A2 and a second duration D2.
  • the amplitude A1 is chosen to allow the shutter 16 to move.
  • the amplitude of the electric actuation control signal then decreases to an amplitude A3 allowing the shutter 16 to be held in the position it has reached.
  • the duration D1 is chosen so that the valve 13 closes the orifice 14 to the maximum while the piston 12 passes from the bottom dead center to the top dead center.
  • the duration D1 therefore depends on the desired pressure in the compression chamber.
  • the duration D2 is twice the duration D1.
  • the duration D2 is chosen so that the duration D1 + D2, in the case where Tn is zero, generates a failure, that is to say that the valve does not have time to return to the position in which it opens the door. orifice 14 and that the piston 12 begins a new period of its periodic movement.
  • the pressure applied by the piston 12 when it passes again from the bottom dead center to the top dead center, even if the solenoid valve is no longer controlled, will have the effect of keeping the valve 13 in the closed position of the orifice 14 and thus maintain the pressure in the chamber 15 and therefore in the ramp 5.
  • the valve 13 When the duration Tn of the delay time is sufficiently long, the valve 13 returns to the position in which it opens the orifice 14 and the piston 12 does not compress the fuel in the chamber 15.
  • the amplitude A2 is strictly lower than the amplitude A1.
  • the amplitude A3 is strictly smaller than the amplitude A1.
  • Step 204 consists in determining an optimal time delay, according to the determination method described with reference to the figure 3 .
  • the method controls the movable shutter according to the optimal timing (steps 205 to 207).
  • step 202 the method proceeds directly to step 205.
  • the movable shutter control includes the step of
  • the duration Tb is either a reference duration or the optimal delay determined in step 204.
  • Actuation control 301 and brake control 303 are carried by control current pulses of the solenoid valve.
  • the actuation command 301 is that of the Figures 5 and 6 .
  • the braking command 303 is carried by a pulse of a third maximum amplitude A4 and a third duration D3.
  • the third maximum amplitude A4 is strictly lower than the first maximum amplitude A1.
  • the third duration D3 is equal to a quarter of the duration D1.
  • This duration D1 is chosen to allow braking the shutter 16 of the solenoid valve, when it tends to return to the position in which the valve 13 opens the orifice 14.
  • This duration D1 is also chosen so that it generates no pressure failure in the distribution manifold 5 with respect to the pressure setpoint applied by the engine control unit 25.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Exposure Control For Cameras (AREA)
  • Shutters For Cameras (AREA)
EP14187253.1A 2013-10-02 2014-10-01 Verfahren zur Bestimmung der optimalen Zeitverzögerung zwischen einem Betätigungsbefehl und einem Testbefehl eines beweglichen Verschlusses eines Magnetventils Withdrawn EP2857662A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1359543A FR3011280B1 (fr) 2013-10-02 2013-10-02 Procede de determination d'une temporisation optimale entre une commande d'actionnement et une commande de test d'un obturateur mobile d'une electrovanne

Publications (1)

Publication Number Publication Date
EP2857662A1 true EP2857662A1 (de) 2015-04-08

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EP14187253.1A Withdrawn EP2857662A1 (de) 2013-10-02 2014-10-01 Verfahren zur Bestimmung der optimalen Zeitverzögerung zwischen einem Betätigungsbefehl und einem Testbefehl eines beweglichen Verschlusses eines Magnetventils

Country Status (3)

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EP (1) EP2857662A1 (de)
CN (1) CN104675551B (de)
FR (1) FR3011280B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080017173A1 (en) * 2006-07-21 2008-01-24 Denso Corporation Fuel injection control system
DE102006043326A1 (de) * 2006-09-15 2008-03-27 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
US20110288748A1 (en) * 2008-12-11 2011-11-24 Uwe Richter Method for operating a fuel injection system of an internal combustion engine
EP2453122A1 (de) 2010-11-12 2012-05-16 Hitachi Ltd. Verfahren und Steuergerät zur Steuerung einer Hochdruckkraftstoffförderpumpe zur Speisung von Kraftstoff unter Druck in einen Verbrennungsmotor
DE102011085277A1 (de) * 2011-10-27 2013-05-02 Robert Bosch Gmbh Verfahren zum Betreiben eines Schaltventils

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007045779A1 (de) * 2007-09-25 2009-04-09 Continental Automotive Gmbh Verfahren zur Ansteuerung eines Magnetventils und zugehörige Vorrichtung
CN102493886B (zh) * 2011-11-30 2014-04-30 潍柴动力股份有限公司 一种喷油器开启时间修正方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080017173A1 (en) * 2006-07-21 2008-01-24 Denso Corporation Fuel injection control system
DE102006043326A1 (de) * 2006-09-15 2008-03-27 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
US20110288748A1 (en) * 2008-12-11 2011-11-24 Uwe Richter Method for operating a fuel injection system of an internal combustion engine
EP2453122A1 (de) 2010-11-12 2012-05-16 Hitachi Ltd. Verfahren und Steuergerät zur Steuerung einer Hochdruckkraftstoffförderpumpe zur Speisung von Kraftstoff unter Druck in einen Verbrennungsmotor
DE102011085277A1 (de) * 2011-10-27 2013-05-02 Robert Bosch Gmbh Verfahren zum Betreiben eines Schaltventils

Also Published As

Publication number Publication date
FR3011280B1 (fr) 2019-05-10
FR3011280A1 (fr) 2015-04-03
CN104675551A (zh) 2015-06-03
CN104675551B (zh) 2020-12-08

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