WO2009077254A1 - Procédé pour faire fonctionner un dispositif d'injection - Google Patents

Procédé pour faire fonctionner un dispositif d'injection Download PDF

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Publication number
WO2009077254A1
WO2009077254A1 PCT/EP2008/064646 EP2008064646W WO2009077254A1 WO 2009077254 A1 WO2009077254 A1 WO 2009077254A1 EP 2008064646 W EP2008064646 W EP 2008064646W WO 2009077254 A1 WO2009077254 A1 WO 2009077254A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve element
current coil
injection device
coil
internal combustion
Prior art date
Application number
PCT/EP2008/064646
Other languages
German (de)
English (en)
Inventor
Wolfgang Ripper
Ralph Bauer
Bernd Schelling
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2009077254A1 publication Critical patent/WO2009077254A1/fr

Links

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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • 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
    • H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F01N2610/146—Control thereof, e.g. control of injectors or injection valves
    • 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
    • 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
    • F02D2041/2041—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit for controlling the current in the free-wheeling phase
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a method for operating an injection device for an internal combustion engine or a subsystem of an internal combustion engine in a motor vehicle according to the preamble of claim 1.
  • the invention relates to a control and / or regulating device and a computer program according to the preamble of the corresponding independent claim.
  • a fuel injection device in which an annular armature is slid in a sliding fit on a valve element. Upon termination of a closing operation of the fuel injection device, the armature is delayed in the closing direction and then moved back against the closing direction. He compensates for dynamic energy.
  • a current coil connected to the housing of the fuel injection device is energized in pulses and acts on the magnet armature.
  • a control and / or regulating device controls all functions of the fuel injection device.
  • the object of the invention is to provide or develop a method of the type mentioned in which the injector operates reliably and low-emission and low-emission operation of an equipped with the injector according to the invention internal combustion engine or a corresponding subsystem is guaranteed.
  • the object is achieved by a method having the features of claim 1. Further solutions are mentioned in the independent claims, which relate to a control and / or regulating device and a computer program. Advantageous developments of the invention are also listed in subclaims. Important features are further included in the following description and in the drawing, these features may be important both alone and in different combinations, without being explicitly pointed out.
  • the invention has the advantage that the movement of the valve element can be slowed down, without the coil being energized with additional energy.
  • the heat input into the injection device is comparatively low, and it can be used to control a comparatively simple and inexpensive power amplifier.
  • the movement, in particular the velocity profile of the valve element can be influenced so that a low-emission and fuel-efficient operation of an internal combustion engine or a subsystem, in which the injection device is installed, is made possible.
  • an induction voltage is generated by the closing movement of the valve element in the current coil which acts on the valve element Generates force which acts in the opposite direction to the direction of movement of the valve element and thereby slows down the movement of the valve element.
  • the equipment required for this purpose are available in the usual injection device anyway.
  • the method merely modifies the control of the electronic switches for opening and closing the injector by the valve element, which are preferably integrated in the control and / or regulating device.
  • Valve element is short-circuited to the valve seat. This reduces the speed of the valve element just prior to impacting it on the valve seat, which reduces the wear thereon, increases the life of the valve element and the valve seat, and also achieves a reduction in noise in the injector.
  • the magnetic energy from the current coil is at least substantially removed by a rapid quenching and the current coil is then short-circuited.
  • the rapid quenching phase the magnetic energy builds up which originates from a previously flowing electric current, in the current coil from very fast.
  • the current coil is thereby brought - physically seen - in a neutral position, which creates an optimal prerequisite for the deceleration of the armature by the current, which is caused by the induction voltage.
  • this braking phase the current coil is short-circuited.
  • Figure 1 is a schematic representation of an internal combustion engine with exhaust tract (subsystem);
  • Figure 2 is a schematic representation of the injection device according to the invention in vertical section
  • Figure 3 is a schematic circuit of the control of the injection device of Figure 1;
  • Figure 4 is a diagram in which the stroke of a valve element of the injector of Figure 1 and the energization of a current coil over time are plotted;
  • Figure 5 is a view similar to Figure 3 of an alternative embodiment.
  • Figure 6 is a view similar to Figure 3 of yet another alternative embodiment.
  • FIG. 1 shows an internal combustion engine 20, in whose combustion chambers 22 fuel is injected by means of fuel injection devices Ia. These are connected to a high-pressure rail 26, which is fed by a fuel supply 28.
  • a fuel injection device Ib is arranged, which also to the fuel supply 28th is connected and can be injected by means of fuel in the exhaust gas. Such injection occurs when the diesel particulate filter 32 is to be regenerated.
  • a urea injector Ic is fed by a urea supply device 38 and serves to form ammonia in the exhaust gas, by which the nitrogen oxide in the exhaust gas is reduced.
  • the injectors Ia-Ic may in principle be similar, and are therefore hereinafter referred to in their entirety only by the reference numeral 1.
  • the injection device 1 has a needle-like valve element 3, which cooperates with a housing-side valve seat 4.
  • the valve element 3 has an annular magnet armature 5 in its upper region in FIG. 2 (in an embodiment which is not shown, a ferromagnetic armature can also be used).
  • annular current coil 7 is arranged at a predetermined distance from the armature 5 - slightly offset in Figure 2 upward - an annular current coil 7 is arranged.
  • a spring element 8 is positioned, which with its spring force presses the valve element 3 in the closing direction towards the valve seat 4.
  • the valve element 3 is lifted from the valve seat by an electric current through the current coil 7 is switched.
  • a force is generated in the current coil 7, which acts on the armature 5 and this raises against the spring force of the spring element 8, and maximum to a position in which the current coil 7 and armature 5 are flush with each other.
  • To lower the electric current is switched off, which reduces the force in the coil.
  • the spring element 8 now presses the valve element 3 into the valve seat 4 with its spring force.
  • the current coil 7 is driven by a control device 12, which may be arranged in the injection device 1 or outside of the injection device 1.
  • the control device 12 comprises a circuit according to FIG. 3: An electrical voltage U, preferably the battery voltage of the motor vehicle, is applied to the current coil 7 via an electronic switch 9 (high-side switch). The other side of the current coil 7 is grounded via an electronic switch 10 (low side switch).
  • the electronic switches 9 and 10 can, for example, as a field effect transistor, for example.
  • a MOSFET metal oxide semiconductor field-effect transistor
  • a freewheeling diode 11 is connected in parallel, in such a way that the switch 9 within the
  • the freewheeling diode 11 is also used to protect electronic components from overvoltage when switching off the inductive DC load in the power coil 7, where in rapid switching operations, a voltage peak of a multiple of the applied voltage U can be achieved.
  • the circuit comprises a Zener diode 13, which is connected in parallel with the coil 7.
  • FIG. 4 shows in the upper part of a diagram in which a stroke H of the valve element 3 is plotted against time, and in the lower part of a diagram in which a current I flowing through the coil 7, is plotted against time.
  • the valve element 3 is lifted from the valve seat 4 at time to (start of injection).
  • the switches 9 and 10 are closed.
  • Current flows through the current coil 7 and builds up in this a magnetic field.
  • the resulting magnetic energy lifts the valve needle 3 via the armature 5 of the valve seat 4 (see reference numeral 6), since the device tries to minimize a magnetic resistance (an air gap between the current coil 7 and magnet armature 5 is minimized).
  • the air gap is minimal (holding current in the current coil 7).
  • Valve element 3 to a stop, not shown, so the opening movement is completed.
  • the closing of the valve element 3 is prepared.
  • the switches 9 and 10 are opened at time t 2 , ie via the current coil 7 builds up a
  • the either rigidly predetermined or may depend on one or more operating variables of the internal combustion engine closes the switch 9, and the switch 10 remains open. Now the current coil 7 is short-circuited. The armature 5 still moves through the meantime magnetically neutral current coil 7 and induced in this now an induction voltage.
  • FIG. 5 An alternative embodiment of a circuit is shown in FIG. 5, wherein those elements which are functionally equivalent to elements already described bear the same reference numerals and are not explained again in detail.
  • the switches 9 and 10 reversed.
  • Freewheeling diode 11 and the Zener diode 13 are connected in parallel with the coil 7, that is, on the one hand between the switch 9 and coil 7 and on the other hand between the switch 10 and the coil 7.
  • FIG. 6 A further alternative is shown in FIG. 6: this is similar to that of FIG. 3, but the zener diode 13 is connected in parallel to the coil 7 and to the switch 9.
  • the freewheeling diode is replaced by a switch 11, for example a MOSFET.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne un procédé pour faire fonctionner un dispositif d'injection (1), en particulier pour des moteurs à combustion interne dans des véhicules automobiles. Le dispositif d'injection (1) comprend une bobine de courant (7) et un induit magnétique (5) pour actionner un obturateur de soupape (3) qui coopère avec un siège de soupape (4). D'après le procédé, la bobine de courant (7) est temporairement court-circuitée (64) pendant le mouvement de l'obturateur de soupape (3), ce qui permet de freiner le mouvement sans qu'une alimentation supplémentaire de la bobine (7) soit nécessaire.
PCT/EP2008/064646 2007-12-17 2008-10-29 Procédé pour faire fonctionner un dispositif d'injection WO2009077254A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007060771A DE102007060771A1 (de) 2007-12-17 2007-12-17 Verfahren zum Betreiben einer Einspritzvorrichtung
DE102007060771.9 2007-12-17

Publications (1)

Publication Number Publication Date
WO2009077254A1 true WO2009077254A1 (fr) 2009-06-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/064646 WO2009077254A1 (fr) 2007-12-17 2008-10-29 Procédé pour faire fonctionner un dispositif d'injection

Country Status (2)

Country Link
DE (1) DE102007060771A1 (fr)
WO (1) WO2009077254A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013507582A (ja) * 2009-10-12 2013-03-04 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 電磁弁を動作させるための回路

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2568155B1 (fr) * 2011-09-09 2018-11-14 Continental Automotive GmbH Ensemble de soupape et soupape d'injection
GB201217144D0 (en) * 2012-09-26 2012-11-07 Delphi Tech Holding Sarl A fluid injector
DE102015210196A1 (de) 2015-06-02 2016-12-08 Robert Bosch Gmbh Verfahren zum Betreiben eines Magnetventils, Vorrichtung zur Durchführung des Verfahrens, Computer-Programm und Computer-Programmprodukt
DE102015212148B4 (de) 2015-06-30 2020-05-14 Robert Bosch Gmbh Verfahren zum Betreiben einer Hubkolbenpumpe, Vorrichtung zur Durchführung des Verfahrens, Computer-Programm und Computer-Programmprodukt
EP3165751B1 (fr) 2015-11-03 2021-01-20 C.R.F. Società Consortile per Azioni Système de commande d'électrovanne
FR3090185A1 (fr) * 2018-12-17 2020-06-19 Valeo Systeme De Controle Moteur Dispositif electromecanique comportant un systeme d'attenuation du bruit
DE102019219635A1 (de) * 2019-12-14 2021-06-17 Robert Bosch Gmbh Verfahren zum Betreiben einer Pumpe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4433209A1 (de) * 1994-09-17 1996-03-21 Mtu Friedrichshafen Gmbh Verfahren zur Bestimmung des Ankeraufprallzeitpunktes bei Entstromung eines Magnetventils
US6128175A (en) * 1998-12-17 2000-10-03 Siemens Automotive Corporation Apparatus and method for electronically reducing the impact of an armature in a fuel injector
EP1179670A1 (fr) * 2000-08-04 2002-02-13 MAGNETI MARELLI POWERTRAIN S.p.A. Procédé et dispositif pour actionner un injecteur dans un moteur à combustion interne.
US7013876B1 (en) * 2005-03-31 2006-03-21 Caterpillar Inc. Fuel injector control system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10148219B4 (de) 2001-09-28 2007-05-16 Bosch Gmbh Robert Verfahren, Computerprogram und Steuer-und/oder Regelgerät für eine Brennkraftmaschine, sowie Brennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4433209A1 (de) * 1994-09-17 1996-03-21 Mtu Friedrichshafen Gmbh Verfahren zur Bestimmung des Ankeraufprallzeitpunktes bei Entstromung eines Magnetventils
US6128175A (en) * 1998-12-17 2000-10-03 Siemens Automotive Corporation Apparatus and method for electronically reducing the impact of an armature in a fuel injector
EP1179670A1 (fr) * 2000-08-04 2002-02-13 MAGNETI MARELLI POWERTRAIN S.p.A. Procédé et dispositif pour actionner un injecteur dans un moteur à combustion interne.
US7013876B1 (en) * 2005-03-31 2006-03-21 Caterpillar Inc. Fuel injector control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013507582A (ja) * 2009-10-12 2013-03-04 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 電磁弁を動作させるための回路

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