EP1236883A2 - Kraftstoffsystem - Google Patents

Kraftstoffsystem Download PDF

Info

Publication number
EP1236883A2
EP1236883A2 EP02251468A EP02251468A EP1236883A2 EP 1236883 A2 EP1236883 A2 EP 1236883A2 EP 02251468 A EP02251468 A EP 02251468A EP 02251468 A EP02251468 A EP 02251468A EP 1236883 A2 EP1236883 A2 EP 1236883A2
Authority
EP
European Patent Office
Prior art keywords
fuel
control
chamber
shut
valve
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Withdrawn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
EP02251468A
Other languages
English (en)
French (fr)
Other versions
EP1236883A3 (de
Inventor
Christopher Stringfellow
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of EP1236883A2 publication Critical patent/EP1236883A2/de
Publication of EP1236883A3 publication Critical patent/EP1236883A3/de
Withdrawn legal-status Critical Current

Links

Images

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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0005—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using valves actuated by fluid pressure

Definitions

  • the invention relates to a fuel system for use in delivering fuel to an internal combustion engine.
  • the invention relates to a common rail fuel system comprising a common rail arranged to supply fuel under high pressure to a plurality of fuel injectors.
  • a common rail In a common rail fuel system, a common rail is charged with fuel at high pressure by means of a high pressure fuel pump, and is arranged to supply fuel to a plurality of fuel injectors for delivering fuel to the associated engine.
  • a two way control valve in the fuel system to control the pressure of fuel within a fuel injector control chamber.
  • a surface associated with a valve needle of the injector is exposed to fuel pressure within the control chamber, the pressure of fuel within the control chamber applying a force to the valve needle which serves to urge the valve needle against a valve needle seating. When the valve needle is seated, fuel injection does not occur.
  • control valve When it is desired to commence injection, the control valve is actuated so as to cause a reduction in fuel pressure within the control chamber such that the valve needle is caused to lift away from its seating, permitting fuel within a delivery chamber to flow past the valve needle seating into the engine cylinder or other combustion space.
  • the control chamber communicates with the common rail through a restricted flow passage.
  • the control valve controls communication between the control chamber and a low pressure fuel reservoir such that, when the control valve is closed a high pressure is established within the control chamber and when the control valve is open, fuel within the control chamber is able to drain to the low pressure fuel reservoir.
  • fuel is able to flow at a restricted rate to the control chamber and from the control chamber to the low pressure reservoir.
  • the system is inefficient, however, due to the presence of the fuel flow path between the source of high pressure fuel and the low pressure drain.
  • DE 4142739 describes a fuel system of the aforementioned type.
  • Efficiency of the fuel system may be improved by replacing the two way control valve with a three way control valve arranged such that the control chamber communicates either with the source of fuel under pressure or with the low pressure fuel reservoir. Direct communication between the source of high pressure fuel and the low pressure fuel reservoir is therefore prevented, or restricted to the periods during which the control valve is being switched. However, the aforementioned hazard of fuel leakage past the valve needle seating into the engine cylinder is not avoided.
  • a fuel system comprising a fuel injector having a valve needle which is engageable with a valve needle seating to control fuel delivery from the injector and a delivery chamber which is arranged to receive fuel from a source of high pressure fuel and from which fuel is delivered to a combustion space upon initiation of injection, the fuel system comprising first and second control chambers for receiving a control fluid, wherein a surface of the valve needle or a component carried thereby is exposed to fluid pressure within the first control chamber, a three way control valve arrangement which is operable to control fluid pressure within the first control chamber so as to control fuel injection timing, and to control fluid pressure within the second chamber, and a shut-off valve arrangement operable in response to fluid pressure variations within the second control chamber so as to control the flow of fuel between the source of high pressure fuel and the delivery chamber of the injector, wherein the three way control valve arrangement is actuable between a first position in which the first control chamber communicates with a source of control fluid at relatively high pressure and a second position in which communication between the source of
  • Movement of the valve needle away from the valve needle seating to initiate fuel injection is controlled directly by means of the three way valve arrangement, by operating the three way valve to control fuel pressure within the first control chamber at the back of the needle.
  • the shut-off valve arrangement is arranged such that, when the control valve arrangement is in the second position, the shut-off valve arrangement is caused to move into an open position to permit fuel flow between the source of high pressure fuel and the delivery chamber.
  • the control fluid may, but need not, take the form of fuel to be injected by the injector.
  • the invention provides the advantage that, between successive injections of fuel, the shut-off valve arrangement terminates the flow of fuel into the delivery chamber of the injector. Thus, the risk of fuel leaking into the combustion space between injections is substantially eliminated.
  • the shut-off valve arrangement preferably includes a shut-off valve member exposed to fluid pressure within the second control chamber, wherein the shut off valve member is engageable with a seating to control delivery of fuel under high pressure to the delivery chamber, wherein the shut-off valve member is biased away from the seating by a force due to bias means, for example a spring, and whereby the flow of fuel from the source of fuel at high pressure to the delivery chamber is prevented when the shut-off valve member is seated against the seating.
  • bias means for example a spring
  • the shut-off valve member may be biased into engagement with a seating by a force due to the bias means, the flow of fuel from the source of fuel at high pressure to the delivery chamber being prevented when the shut-off valve member is seated against the seating.
  • the system may be arranged such that the first control chamber selectively communicates with the source of control fluid at relatively high pressure through a first flow path provided with a first restriction.
  • the system may also be arranged such that the second control chamber selectively communicates with the source of control fluid at relatively high pressure through a second flow path provided with a second restriction.
  • the fuel system includes a fuel injector, referred to generally as 10, comprising a valve needle 12 which is slidable within a bore 14 provided in a fuel injector nozzle body 16 (only a part of which is shown).
  • the bore 14 is shaped to define a valve needle seating 18 with which the valve needle 12 is engageable to control fuel delivery through a set of outlet openings 20 provided in the nozzle body 16.
  • the valve needle 12 and the bore 14 within which the valve needle 12 moves are shaped such that movement of the valve needle 12 is guided by co-operation between a region of the valve needle 12 and an adjacent region of the bore 14.
  • the bore 14 is shaped to define a delivery chamber 22 for receiving high pressure fuel through a first supply passage 24.
  • a force is applied to a thrust surface 12 a of the valve needle 12 which serves to urge the valve needle 12 away from the valve needle seating 18.
  • a surface of the valve needle 12, or a component carried by the valve needle 12 is exposed to fuel pressure within a first control chamber 26 housing a first spring 30, wherein the first control chamber 26 is in communication with a further supply passage 28.
  • a force due to fuel pressure within the first control chamber 26 acts in combination with a force due to the first spring 30 to oppose the force applied to the thrust surface 12 a of the valve needle 12 due to fuel pressure within the delivery chamber 22.
  • movement of the valve needle 12 towards and away from the valve needle seating 18 can be controlled so as to control the timing of initiation and termination of fuel injection.
  • Fuel pressure within the first control chamber 26 is controlled by means of a control valve arrangement 32 in the form of a three way control valve.
  • the three way control valve 32 includes a second spring 40 which acts on a valve member (not shown) of the arrangement 32 to urge the three way control valve 32 into a first position (as shown in Figure 1).
  • the three way control valve 32 is arranged such that fuel from a source 34 of fuel at high pressure is able to flow through the three way control valve 32, into the further supply passage 28 and through a first restriction 28 a into the first control chamber 26.
  • the provision of the first restriction 2 8a serves to limit the rate at which high pressure fuel can flow into the first control chamber 26 when the three way control valve 32 is in the first position, and the rate at which fuel is able to escape from the first control chamber 26 to the low pressure drain 38 when the three way control valve 32 is moved to the second position.
  • the three way control valve 32 may be an electromagnetically operated valve arrangement in which an armature is coupled to a control valve member, energisation and de-energisation of a winding causing movement of the armature and, hence, movement of the control valve member. It will be appreciated, however, that the control valve arrangement may be actuated by alternative means.
  • the source 34 may take the form of a common rail supplied with fuel under high pressure by means of a high pressure fuel pump 41.
  • the three way control valve 32 is also arranged to control the supply of fuel through an additional supply passage 42 to a second control chamber 44 associated with a shut-off valve arrangement, referred to generally as 46.
  • the additional supply passage 42 is provided with a second restriction 42 a which serves to limit the rate at which fuel is able to flow from the source 34 of fuel at high pressure to the second control chamber 44 when the control valve arrangement is in the first position, and the rate at which fuel is able to escape from the second control chamber 44 to the low pressure drain 38 when the three way control valve 32 is in the second position.
  • the shut-off valve arrangement 46 is arranged to control the supply of fuel from the source 34 to the first supply passage 24 and, hence, to the delivery chamber 22 of the fuel injector.
  • the shut-off valve arrangement 46 includes a shut-off valve member 48 which is slidable within a further bore 49 defined in a shut-off valve housing.
  • the further bore 49 is shaped to define a further seating 50 with which the shut-off valve member 48 is engageable.
  • the shut-off valve arrangement 46 includes a third spring 52 which biases the shut-off valve member 48 into an open position.
  • fuel pressure within the second control chamber 44 is increased such that a force is applied to an end surface of the shut-off valve member 48 which serves to overcome the force due to the third spring 52, thereby urging the shut-off valve member 48 into engagement with the further seating 50.
  • valve needle 12 In use, starting from circumstances in which the three way control valve 32 is in the first position, such that fuel under high pressure is supplied through the further supply passage 28 to the first control chamber 26 and through the additional supply passage 42 to the second control chamber 44, the valve needle 12 will be urged against the valve needle seating 18 due to the force of the spring 30 acting in combination with the force due to fuel under high pressure within the first control chamber 26. Additionally, the shut-off valve member 48 will be urged against the further seating 50 due to high fuel pressure within the second control chamber 44. High pressure fuel from the source 34 cannot therefore flow past the further seating 50, into the supply passage 24 and into the delivery chamber 22. As the valve needle 12 is seated against its seating 18, fuel injection does not take place.
  • the three way control valve 32 In order to initiate injection, the three way control valve 32 is moved to the second position, thereby breaking communication between the source 34 of fuel at high pressure and the first and second control chambers 26, 44. Fuel within the first control chamber 26 is able to flow through the three way control valve 32 into the low pressure reservoir 38 such that fuel pressure within the first control chamber 26 is reduced. Movement of the three way control valve 32 into its second position also provides the effect of causing fuel pressure within the second control chamber 44 to be reduced as fuel is able to flow from the second control chamber 44 to the low pressure drain 38.
  • shut-off valve member 48 As a reduced force acts on the end of the shut-off valve member 48 due to reduced fuel pressure within the second control chamber 44, the shut-off valve member 48 is urged away from the further seating 50 due to the force of the third spring 52, thereby causing fuel under high pressure to flow from the source 34, through the shut-off valve arrangement 46 and into the delivery chamber 22.
  • the force applied to the thrust surface 12 a of the valve needle 12 is therefore increased and a point will be reached at which the increased force applied to the thrust surface 12 a is sufficient to overcome the reduced force applied to the surface of the valve needle 12 by fuel within the first control chamber 26 such that the valve needle 12 moves away from the valve needle seating 18.
  • Fuel within the delivery chamber 22 is therefore able to flow past the valve needle seating 18 and through the outlet openings 20 into the engine cylinder or other combustion space.
  • the three way control valve 32 When it is desired to terminate injection, the three way control valve 32 is moved into its first position such that communication between the first control chamber 26 and the low pressure drain 38 is broken and, in addition, communication between the second control chamber 44 and the low pressure drain 38 is broken. High pressure fuel from the source 34 is therefore able to flow through the three way control valve 32 into both the further supply passage 2, and hence into the first control chamber 26, and also through the additional supply passage 42 into the second control chamber 44. Increased fuel pressure within the second control chamber 44 serves to urge the shut-off valve member 48 against the further seating 50 to break communication between the source 34 and the delivery chamber 22.
  • the three way control valve 32 provides a common means for controlling both movement of the valve needle 12, by controlling fuel pressure within the first chamber 26, and for controlling movement of the valve member 48 of the shut off valve arrangement 46 by controlling fuel pressure within the second chamber 44.
  • the three way control valve 32 has two states of operation, a first in which fuel pressure within the first chamber 26 is caused to be increased and fuel pressure within the second chamber 44 is caused to be reduced, and a second in which fuel pressure within the first chamber 26 is caused to be reduced and fuel pressure within the second chamber 44 is caused to be reduced.
  • the system is relatively simple in that only two valves 32, 46 are required (in addition to the valve needle of the injector) to control fuel injection, with operation of the shut off valve arrangement 46 and the valve needle 12 being controlled by a common control means in the form of the three way valve arrangement 32.
  • the present invention provides the further advantage that, between subsequent injections of fuel, the flow of high pressure fuel into the delivery chamber 22 is prevented by means of the shut-off valve arrangement 46. Any leakage of fuel into the engine cylinder between successive injections is therefore substantially eliminated.
  • This provides a particular advantage in heavy duty systems where the period between successive injections of fuel is relatively long.
  • the system is also advantageous in that, due to the provision of the three way valve 32 to control communication between the chambers 26, 44, the low pressure drain 38 and the source 34, the flow of high pressure fuel to the low pressure drain 38 is restricted to periods during which the control valve member 32 is being switched. Leakage of fuel to low pressure during fuel injection is therefore reduced and fuel consumption is improved.
  • first spring 30 within the first control chamber 26 ensures the valve needle 12 is urged against the valve needle seating 18 when the engine is not operational. It will be appreciated, however, that alternative bias means may be provided, if required.
  • the arrangement of the first spring 30 within the first control chamber 26 substantially eliminates an additional leakage path to the low pressure drain 38, thereby reducing the parasitic loss of fuel to the low pressure reservoir.
  • the third spring 52 forming part of the shut-off valve arrangement 46 may be arranged within the second control chamber 44 to urge the shut-off valve member 48 against the further seating 50.
  • the system can still be operated as described previously as a sufficient force will be applied to the angled surfaces of the shut-off valve member 48 to urge the shut-off valve member 48 away from the further seating 50 when fuel pressure within the second control chamber 44 is reduced.
  • shut off valve arrangement 46 may be configured such that fuel pressure is increased within the chamber housing the spring 52 at the end of the valve member 48 remote from the chamber 44.
  • this embodiment of the invention may include an outwardly opening valve needle, but it will be appreciated that an alternative arrangement of flow lines may be provided to enable this embodiment to be operated with an inwardly opening needle (as in Figure 1).
  • a further advantage of the present invention is that the valve needle 12 is urged against the valve needle seating 18 to terminate injection more rapidly due to high pressure fuel within the first control chamber 26 acting in combination with the force due to the first spring 30 and reduced fuel pressure within the delivery chamber 22. It will be appreciated that, when the three way control valve 32 is moved to the first position, the time at which the shut-off valve member 48 moves towards the further seating 50 relative to movement of the valve needle 12 towards the seating 18 can be optimised by careful selection of the dimensions of the first and second restrictions 28 a , 42 a provided in the further and additional supply passages 28, 42 respectively.
  • FIG 2 shows an alternative embodiment of the invention in which a separate control fluid is used to control the shut-off valve arrangement 46 and the fuel injector 10, rather than fuel from the source 34.
  • the three way valve 32 is operable to control fuel pressure in both the first chamber 26 and the second chamber 44 so as to control movement of both the valve needle 12 and the shut off valve member 48.
  • a second pump 61 is arranged to draw the control fluid from a reservoir 60, the delivery of the control fluid to the further supply passage 28 and the additional supply passage 42 being controlled by means of the three way control valve 32.
  • Fuel to be delivered through the first supply passage 24 to the delivery chamber 22 of the injector is supplied from the source 34, as described previously with reference to Figure 1.
  • the three way control valve 32 When it is desired to commence injection, the three way control valve 32 is moved to its second position such that control fluid is unable to flow into the first and second control chambers 26, 44. Control fluid within the first control chamber 26 is able to flow through the three way control valve 32 into the reservoir 60 such that fluid pressure within the first control chamber 26 is reduced. Additionally, control fluid within the second control chamber 44 is able to flow through the three way control valve 32 to the reservoir 60 such that a reduced force acts on the end of the shut-off valve member 48 due to reduced fluid pressure within the second control chamber 44, the shut-off valve member 48 thereby being urged away from the further seating 50 to enable fuel from the fuel source 34 to flow into the first supply passage 24 for delivery to the delivery chamber 22. In such circumstances, fuel injection takes place through the outlet openings 20, as described previously.
  • control fluid may take the form of engine lubricating oil.
EP02251468A 2001-03-02 2002-03-01 Kraftstoffsystem Withdrawn EP1236883A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0105193A GB0105193D0 (en) 2001-03-02 2001-03-02 Fuel system
GB0105193 2001-03-02

Publications (2)

Publication Number Publication Date
EP1236883A2 true EP1236883A2 (de) 2002-09-04
EP1236883A3 EP1236883A3 (de) 2003-11-26

Family

ID=9909858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02251468A Withdrawn EP1236883A3 (de) 2001-03-02 2002-03-01 Kraftstoffsystem

Country Status (2)

Country Link
EP (1) EP1236883A3 (de)
GB (1) GB0105193D0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1286043A2 (de) * 2001-08-23 2003-02-26 Robert Bosch Gmbh Druck-Hub-gesteuerter Injektor für Kraftstoffeinspritzsysteme
WO2007027331A1 (en) * 2005-08-29 2007-03-08 Caterpillar Inc. Single fluid injector with rate shaping capability
EP1941154A1 (de) * 2005-10-19 2008-07-09 Volvo Lastvagnar AB Kraftstoffeinspritzsystem für kraftstoffe mit niedriger viskosität
DE102017004540A1 (de) * 2017-05-11 2018-11-15 L'orange Gmbh Ventilanordnung und Kraftstoffinjektor mit einer solchen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142739A1 (de) 1991-12-23 1993-06-24 Hartmut Wedler Vorrichtung zum vereinzeln von aus bandartigen materialien, insbesondere papierstreifen gewickelten rollen, insbesondere kassenbonrollen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2759255A1 (de) * 1977-12-31 1979-07-12 Bosch Gmbh Robert Kraftstoffeinspritzventil fuer brennkraftmaschinen
AT1624U1 (de) * 1995-03-30 1997-08-25 Avl Verbrennungskraft Messtech Speichereinspritzsystem mit voreinspritzung für eine brennkraftmaschine
GB9905896D0 (en) * 1999-03-16 1999-05-05 Lucas Ind Plc Fuel injector arrangement

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142739A1 (de) 1991-12-23 1993-06-24 Hartmut Wedler Vorrichtung zum vereinzeln von aus bandartigen materialien, insbesondere papierstreifen gewickelten rollen, insbesondere kassenbonrollen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1286043A2 (de) * 2001-08-23 2003-02-26 Robert Bosch Gmbh Druck-Hub-gesteuerter Injektor für Kraftstoffeinspritzsysteme
EP1286043A3 (de) * 2001-08-23 2004-05-12 Robert Bosch Gmbh Druck-Hub-gesteuerter Injektor für Kraftstoffeinspritzsysteme
WO2007027331A1 (en) * 2005-08-29 2007-03-08 Caterpillar Inc. Single fluid injector with rate shaping capability
EP1941154A1 (de) * 2005-10-19 2008-07-09 Volvo Lastvagnar AB Kraftstoffeinspritzsystem für kraftstoffe mit niedriger viskosität
EP1941154A4 (de) * 2005-10-19 2011-08-03 Volvo Lastvagnar Ab Kraftstoffeinspritzsystem für kraftstoffe mit niedriger viskosität
DE102017004540A1 (de) * 2017-05-11 2018-11-15 L'orange Gmbh Ventilanordnung und Kraftstoffinjektor mit einer solchen

Also Published As

Publication number Publication date
GB0105193D0 (en) 2001-04-18
EP1236883A3 (de) 2003-11-26

Similar Documents

Publication Publication Date Title
US6220528B1 (en) Fuel injector including an outer valve needle, and inner valve needle slidable within a bore formed in the outer valve needle
US6024297A (en) Fuel injector
US6601566B2 (en) Fuel injector with directly controlled dual concentric check and engine using same
US6267306B1 (en) Fuel injector including valve needle, injection control valve, and drain valve
JP3468813B2 (ja) 内燃機関のための燃料噴射装置
US6412706B1 (en) Fuel injector
US6854962B2 (en) Pump system with high pressure restriction
US7568634B2 (en) Injection nozzle
EP0957261A2 (de) Brennstoffsystem und Pumpe zur Anwendung in einem solchen System
US7404393B2 (en) Fuel injection system
US6997166B2 (en) Fuel injector
EP1081373A2 (de) Kraftstoffeinspritzventil
EP1245822B1 (de) Einspritzventil mit einem Durchflussbegrenzer in dem Steuerventil
US6340017B1 (en) Fuel injector
EP1236883A2 (de) Kraftstoffsystem
EP0994251A1 (de) Kraftstoffeinspritzvorrichtung
EP1065368A2 (de) Kraftstoffeinspritzventil
EP0939219A2 (de) Kraftstoffeinspritzventil
EP1283355B1 (de) Kraftstoffeinspritzventil
EP1359319B1 (de) Brennstoffeinspritzventil
GB2345741A (en) Pressure balanced control valve
EP1063422A1 (de) Kraftstoffeinspritzventil
US20070108309A1 (en) Hydraulically driven pump-injector with hydromechanical locking device of nozzle needle for internal combustion engines
EP1717435A1 (de) Einspritzdüse

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20040527