EP1584815A1 - Einspritzventil für einen Hochdruckspeicher - Google Patents

Einspritzventil für einen Hochdruckspeicher Download PDF

Info

Publication number
EP1584815A1
EP1584815A1 EP04405207A EP04405207A EP1584815A1 EP 1584815 A1 EP1584815 A1 EP 1584815A1 EP 04405207 A EP04405207 A EP 04405207A EP 04405207 A EP04405207 A EP 04405207A EP 1584815 A1 EP1584815 A1 EP 1584815A1
Authority
EP
European Patent Office
Prior art keywords
fuel
shuttle valve
injector
seat
nozzle
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Withdrawn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
EP04405207A
Other languages
English (en)
French (fr)
Inventor
Tiby M. Martin
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP04405207A priority Critical patent/EP1584815A1/de
Publication of EP1584815A1 publication Critical patent/EP1584815A1/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Withdrawn legal-status Critical Current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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • 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
    • F02M63/0007—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 electrically actuated 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
    • 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
    • F02M63/0059—Arrangements of valve actuators
    • F02M63/0068—Actuators specially adapted for partial and full opening of the 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/06—Fuel-injection apparatus having means for preventing coking, e.g. of fuel injector discharge orifices or valve needles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from 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
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/0043—Two-way valves

Definitions

  • This invention is related to an electronically controlled high-pressure common rail fuel injector for injecting metered amounts of highly pressurized fuel into a cylinder of a diesel engine.
  • Conventional fuel injection systems employ a "jerk" type fuel system for pressurizing and injecting fuel into the cylinder of a diesel engine.
  • a pumping element is actuated by an engine-driven cam to pressurize fuel to a sufficiently high pressure to unseat a pressure-actuated injection valve in the fuel injection nozzle.
  • the plunger is actuated by an engine driven cam to pressurize the fuel inside the bushing chamber when a solenoid is energized and the solenoid valve is closed.
  • the metering and timing is achieved by a signal from an electronic control module (ECM) having a controlled beginning and a controlled pulse.
  • ECM electronice control module
  • the fuel is pressurized by an electronic or mechanical pumping assembly into a common rail and distributed to electronically controlled injectors, which inject pressurized fuel into the engine cylinders. Both the electronic pump and the injectors are controlled by the ECM signal.
  • the electronically controlled common rail allows individual adjustments for all the fuel injection characteristics and all over the engine speed range. This flexibility characteristic only for this system allows to optimize and "tailor" the fuel system to the engine all over the speed range for the best emission and fuel consumption.
  • a high pressure electronic common rail fuel injector comprising an injector body having a fuel inlet therein; a first equalized pressure fuel chamber formed within the injector body and in fluid communication with the fuel inlet; a shuttle valve slidingly disposed within the injector body; a second fuel chamber formed within the injector body under the bottom of the shuttle valve; a nozzle coupled to the injector body; a first fuel passage fluidly coupling the second fuel chamber to the nozzle; a shuttle valve seat formed in the injector body between the first and second fuel chambers; a check ball seat formed between the second fuel chamber and a second fuel passage; a check ball loosely contained between a bottom surface of the shuttle valve and the check ball seat; and a piezoelectric shuttle valve actuator coupled to the shuttle valve, wherein activation of the piezoelectric shuttle valve actuator operates to seat the check ball on the check ball seat, thereby allowing fuel flow between the first and second fuel chambers and preventing fuel flow between the second fuel chamber and the second fuel
  • This fuel injector further comprises a needle valve seat formed in a distal end of the nozzle; a needle valve slidingly disposed within the nozzle; and a controllable biasing member, achieved by placing a piezoelectric actuator between the needle valve and a bias spring, applying a variable biasing force to the needle valve in a direction tending to seat the needle valve against the needle valve seat by varying an amount of control current applied to the actuator.
  • the length of the piezoelectric actuator changes in proportion to the amount of control current applied thereto, thereby changing the bias force applied to the needle valve.
  • the fuel injector under the control of the engine ECM, may control the shape of the fuel injection event profile, changing the shape of the injection event profile in proportion to the amount of control current applied.
  • the profile is altered in relation to engine speed for reducing emission of particulates and hydrocarbons and also reducing fuel consumption.
  • the nozzle has a needle valve seated on a seat on the lower end of the nozzle.
  • the high impact force created by the spring of the biasing device will pound the needle on the seat at every injection end. This may lead to deformation or even to cracks and broken tips because of the combination of high force, high temperatures and thin walls.
  • This design is thus of poor reliability, leading to fuel leaks and broken tips.
  • This will also limit the nozzle closing force, allowing leaks through the seat, blow back from the engines cylinder pressure through spray holes and carbon deposits on the seat.
  • the aim of the invention is to offer an improved electronically controlled high pressure common rail fuel injector free from the above-mentioned drawbacks.
  • a first object of the invention is a high pressure electronic common rail fuel injector, comprising: an injector body having a fuel inlet therein, a first fuel chamber formed within the injector body and in fluid communication with the fuel inlet, a second fuel chamber formed within the injector body, a nozzle coupled to the injector body, a first fuel passage fluidly coupling the second fuel chamber to the nozzle, a shuttle valve slidingly disposed within a bore of the injector body, and an electrically driven shuttle valve actuator coupled to the shuttle valve, wherein said shuttle valve slides between a first position allowing fuel flow, and a second position preventing fuel flow between the first and second fuel chambers, wherein said first and second chambers are defined by two annular recesses, one annular recess being formed in the side wall of the shuttle valve and the other in the side wall of said bore of the injector body, wherein said annular recesses overlap in said first position and are tightly separated in said second position.
  • each first axial force generated by fuel pressure acting on a first shoulder of each annular recess is balanced by a second axial force generated by fuel pressure acting on a second shoulder of the annular recess.
  • controlled fast and efficient opening/closing shuttle movements of the shuttle valve may be obtained by means of an actuator driven under control of the ECM of the vehicle.
  • the shuttle valve may be actuated by various types of actuators.
  • actuators are known in the art.
  • electromagnetic actuators solenoid based actuators
  • piezoelectric actuators etc.
  • the injector according to the invention is not limited to a specific type of actuator.
  • the fuel injector comprises a shuttle valve seat formed in the injector body between the first and second fuel chambers.
  • said shuttle valve has a portion of smaller diameter on one side of its annular recess and a portion of larger diameter on the other side of said recess, both diameters being matched to two inner diameters of the body surrounding said annular recess formed in the injector body.
  • the fuel injector further comprises a shuttle valve actuator coupled to the shuttle valve, wherein activation of the shuttle valve actuator operates to unseat the shuttle valve from the shuttle valve seat, thereby allowing fuel flow between the first and second fuel chambers, and deactivation of the shuttle valve actuator operates to seat the shuttle valve on the shuttle valve seat, and further comprises a biasing member coupled to the shuttle valve and operative to apply a biasing force to the shuttle valve in a direction tending to seat the shuttle valve against the shuttle valve seat, thereby preventing fuel flow between the first and second fuel chambers.
  • a shuttle valve actuator coupled to the shuttle valve, wherein activation of the shuttle valve actuator operates to unseat the shuttle valve from the shuttle valve seat, thereby allowing fuel flow between the first and second fuel chambers, and deactivation of the shuttle valve actuator operates to seat the shuttle valve on the shuttle valve seat, and further comprises a biasing member coupled to the shuttle valve and operative to apply a biasing force to the shuttle valve in a direction tending to seat the shuttle valve against the shuttle valve seat, thereby preventing fuel
  • a second object of the invention is a high pressure common rail fuel injector comprising an injector body having a fuel inlet therein, a first fuel chamber formed within the injector body and in fluid communication with the fuel inlet, a second fuel chamber formed within the injector body, a nozzle coupled to the injector body, a first fuel passage fluidly coupling the second fuel chamber to the nozzle, a shuttle valve slidingly disposed within the injector body, and an electrically driven shuttle valve actuator coupled to the shuttle valve, wherein said shuttle valve slides between a first position allowing fuel flow, and a second position preventing fuel flow between the first and second fuel chambers, said injector further comprising a needle valve seat formed in a proximal end portion of the nozzle; a needle valve slidingly disposed within the nozzle, said needle valve having a resting member at the proximal end thereof; and a biasing member operative to apply a biasing force to said resting member in a direction tending to seat said resting member against the needle valve seat.
  • the needle valve has an internal passage open at the needle valve tip, fluidly coupling said first fuel passage to a fourth chamber at the tip of the nozzle.
  • the tip of said needle valve slides within said fourth chamber without touching the bottom wall of the nozzle body.
  • a high pressure electronic common rail fuel injector of the present invention indicated generally at 10.
  • the injector 10 comprises an injector body 100 having a nozzle retainer 118. mounted to a distal end 116 thereof.
  • a fuel inlet fitting 102 is threadingly engaged to the injector body 100 in order to receive fuel from a common rail fuel injection system (not shown).
  • Fuel passes through a fuel inlet passage 103 into a first equalized pressure chamber 117 formed within the injector body 100.
  • the injector body 100 receives a slidably mounted shuttle valve 101 with a smaller lower diameter (d1) and a larger upper diameter (d2), both diameters matched to two inner diameters of the body 100. Between the portion of smaller diameter and the portion of larger diameter, the shuttle valve 101 has an annular recess 104 which receives the fuel under high pressure through the inlet passage 103. The pressure is thus contained in the first annular pressure chamber 117 defined by the inner wall of the body 100, the annular recess 104 in the shuttle valve 101, the upper shoulder 104a and the lower shoulder 104b of the recess 104.
  • the upper shoulder 104a seals also a body seat 115 preventing the high pressure fuel from entering a second equalized annular pressure chamber 108 and a downward passage 109 to the nozzle 200.
  • the inner body wall has an annular recess 125 defining, together with the cylindrical outer shuttle valve wall, said second annular pressure chamber 108.
  • This configuration of the shuttle valve is illustrated in magnified detail in Fig. 2a.
  • the second pressure chamber 108 is in fluid communication with the downward fuel passage 109 via a transverse passage 122.
  • Fig. 1 and 2a show a first embodiment, the shuttle valve being actuated by a "pull" type actuator and having the seat on the upper side of the annular recess 104.
  • the proximal end of the shuttle valve 101 is coupled to a piezoelectric actuator 106.
  • the piezoelectric actuator 106 exhibits the property that when a current is applied thereto, it generates a movement in the longitudinal direction. Application of varying amounts of current thereto will produce varying amounts of longitudinal movement.
  • the piezoelectric actuator 106 is contained within a cover which is sealingly engaged to the injector body 100.
  • a retaining ring 107 is coupled to the shuttle valve 101 in the area between the piezoelectric actuator 106 and the top of the actuator body 100.
  • a biasing spring 105 located in an upper bore 126 of the injector body 100 is coupled between the retaining ring 107 and the lower face of the actuator 106, thereby producing a downward bias force on the shuttle valve 101.
  • the piezoelectric shuttle valve actuator 106 is not activated (i.e. no current is applied thereto)
  • the bias spring 105 biases the shuttle valve 101 in a downward direction, thereby seating the shuttle valve 101 against the body seat 115. This action prevents fuel from flowing between the first pressure fuel chamber 117 and the second fuel chamber 108. In this configuration, the injector 10 is turned off, and no fuel flows to the nozzle 200.
  • a second bias spring 110 is held within a cylindrical hollow bore 119 in the distal portion 116 of the injector body and is compressed between the bottom of the bore 119 and the top of a spring seat 121.
  • the bottom 120 of the spring seat 121 slides within a bore of a spacer member 111 and is fastened to the top of a needle valve 203a.
  • Fig. 3 shows an enlarged view of the body 200a of the nozzle 200 of Fig. 1.
  • the upper part of the needle valve 203a is slidingly engaged by a passage through the upper part of the body 200a of the injector nozzle.
  • the lower part of the needle valve 203a is arranged to shuttle within a bore of the nozzle body 200a, said bore forming a third pressure chamber 202a.
  • a fuel passage 201a provides fluid communication between the third pressure chamber 202a and the fuel downward passage 109, through the spacer member 111.
  • Fig. 3a shows a more enlarged view of the tip of the nozzle body 200a.
  • the distal end of the needle valve 203a mates with a valve seat 204a formed in the lower end of the nozzle body 200a. Mating and unmating of the needle valve 203a with the valve seat 204a controls flow of fuel from the passages 109 and 201 through the third chamber 202a and through the spray holes 205a.
  • the injector 10 is mounted in an engine (not shown) such that fuel exiting the spray holes 205a is applied to the engine cylinders.
  • the actuator 106 When the actuator 106 is energized, it lifts the shuttle valve 101 off the seat 115, opening fuel access to the second chamber 108 and to the passage 109, and down to nozzle 200.
  • the high pressure fuel passes through the passage 201a into a heart shaped upper area of the third chamber 202a.
  • the fuel pressure will lift the needle valve 203a off its seat 204a, compressing the spring 110, and thus the fuel will be injected into the engines combustion chamber through the spray holes 205a.
  • the spring 105 When the actuator 106 is de-energized, the spring 105 will seat the shuttle valve 101 on the seat 115, preventing from feeding more fuel under pressure into the passage 109, and thus the spring 110 will seat the needle valve 203a on the seat 204a, ending the injection process.
  • Fig. 2b shows a second embodiment of the shuttle valve, the shuttle valve being actuated by a "push" type actuator.
  • the construction of the injector body also uses two different diameters on the plunger like shuttle valve and in the injector body and allows the introduction of a seat for sealing the fuel access to passage 109.
  • a biasing spring device (not shown) opposes the action of the actuator.
  • a retaining surface is coupled to the shuttle valve in the area between the piezoelectric actuator and the actuator body.
  • a biasing spring is coupled between the retaining surface and the bottom surface of the upper bore 126 of the injector body, thereby producing an upward bias force on the shuttle valve 101b, acting to retain the shuttle valve 101b engaged with its valve seat 115b, thereby preventing fuel flow from the equalized pressure chamber 117b to the second chamber 108b the fuel passage 109.
  • the shuttle valve 101b has a smaller upper diameter (d1) and a larger lower diameter (d2), both diameters matched to two inner diameters of the body 100b.
  • the body seat 115b mates and unmates with the lower shoulder 104b of the annular recess 104 of the shuttle valve and the second fuel pressure chamber 108b is located below the first pressure chamber.
  • Fig. 2c shows a third embodiment of a shuttle valve arrangement, the shuttle valve being opened by an upward movement and closed by a downward movement.
  • the upper and lower portions of the slidable shuttle valve 101c have the same diameter (d), matching to the inner diameter of the injector body.
  • the shuttle valve has an annular recess in front of the fuel inlet 103 for forming the first pressure chamber 117c.
  • the inner body wall presents an annular recess, defining together with the shuttle valve outer wall a second pressure chamber 108c.
  • the second chamber 108c is in fluid communication with a downward fuel passage 109.
  • the annular recesses in the body wall and in the shuttle valve are offset so that the two chambers 108c and 117c are tightly separated when the actuator pushes the shuttle valve down but communicate when the actuator pulls the shuttle valve up.
  • the shuttle valve does not push against a seat and the metal-to-metal tight clearance seals the fuel pressure.
  • the actuator may be selected among electromagnetic actuators.
  • the bore of the spacer member 111, the bore 119 in the distal portion of the injector body, and a chamber 123 located below the plunger shuttle valve 101 communicate with one another through a passage 124 and communicate, through a central passage 112 and a cross passage 113 in the shuttle valve 101, with the upper bore 126 receiving the spring 105 and with an outlet passage 114 to the fuel return line to the tank.
  • fuel leakages from the high pressure chambers are collected, and building up of a high pressure condition below the shuttle valve 101 and above the needle valve 203a, which could counteract the shuttle movement of said valves, is prevented.
  • the chamber 123 is not put in fluid communication with an upstream high pressure second chamber at each injection cycle by a set ball valve.
  • first pressure chamber could also be formed by an annular recess in the body wall and the second pressure chamber by an annular recess in the shuttle valve.
  • a preferred solution is also proposed for the nozzle, using a shuttling needle having its contact seat on the upper side of the nozzle.
  • An embodiment thereof is shown in Fig. 4 and, at enlarged scales, in Fig. 5 and 5a.
  • Fig. 4 uses the same injector body as in Fig. 1 and thus, the same numerals are used for this part of the injector without further description.
  • Fig. 5 shows a nozzle using a needle valve 203b slidably mounted in a nozzle body 200b. The upper and lower portions of the needle valve are slidably guided in the nozzle body 200b. The middle portion of the needle valve is surrounded by a third pressure chamber 202b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP04405207A 2004-04-05 2004-04-05 Einspritzventil für einen Hochdruckspeicher Withdrawn EP1584815A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04405207A EP1584815A1 (de) 2004-04-05 2004-04-05 Einspritzventil für einen Hochdruckspeicher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04405207A EP1584815A1 (de) 2004-04-05 2004-04-05 Einspritzventil für einen Hochdruckspeicher

Publications (1)

Publication Number Publication Date
EP1584815A1 true EP1584815A1 (de) 2005-10-12

Family

ID=34896180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405207A Withdrawn EP1584815A1 (de) 2004-04-05 2004-04-05 Einspritzventil für einen Hochdruckspeicher

Country Status (1)

Country Link
EP (1) EP1584815A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020041544A1 (en) * 2018-08-23 2020-02-27 Progress Rail Services Corporation Electronic unit injector shuttle valve

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5497750A (en) * 1993-12-07 1996-03-12 Robert Bosch Gmbh Fuel injection device for internal combustion engines
EP0737808A2 (de) * 1995-04-13 1996-10-16 Tiby M. Martin Elektronisches Hochdruckeinspritzbrennsstoffventil für Verteilerleitung und Steuerungsverfahren der Brennstoffeinspritzung
US5651346A (en) * 1994-12-22 1997-07-29 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh Accumulator-type injection system
US6253736B1 (en) * 1999-08-10 2001-07-03 Cummins Engine Company, Inc. Fuel injector nozzle assembly with feedback control
US6454239B1 (en) * 1999-09-30 2002-09-24 Robert Bosch Gmbh Valve for controlling liquids
US6745952B1 (en) * 1999-10-26 2004-06-08 Robert Bosch Gmbh Fuel injector with integrated flow restrictor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5497750A (en) * 1993-12-07 1996-03-12 Robert Bosch Gmbh Fuel injection device for internal combustion engines
US5651346A (en) * 1994-12-22 1997-07-29 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh Accumulator-type injection system
EP0737808A2 (de) * 1995-04-13 1996-10-16 Tiby M. Martin Elektronisches Hochdruckeinspritzbrennsstoffventil für Verteilerleitung und Steuerungsverfahren der Brennstoffeinspritzung
US6253736B1 (en) * 1999-08-10 2001-07-03 Cummins Engine Company, Inc. Fuel injector nozzle assembly with feedback control
US6454239B1 (en) * 1999-09-30 2002-09-24 Robert Bosch Gmbh Valve for controlling liquids
US6745952B1 (en) * 1999-10-26 2004-06-08 Robert Bosch Gmbh Fuel injector with integrated flow restrictor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020041544A1 (en) * 2018-08-23 2020-02-27 Progress Rail Services Corporation Electronic unit injector shuttle valve
US11746734B2 (en) 2018-08-23 2023-09-05 Progress Rail Services Corporation Electronic unit injector shuttle valve

Similar Documents

Publication Publication Date Title
EP2304218B1 (de) Einspritzventil und verfahren zur gemeinsamen injektion einer flüssigkeit und eines gasförmigen kraftstoffes in die brennkammer eines verbrennungsmotors
CN101382108B (zh) 低回流脉动燃料喷射泵
US6601566B2 (en) Fuel injector with directly controlled dual concentric check and engine using same
EP1448884B1 (de) Einspritzventil für zwei kraftstoffe und verfahren zu dessen steuerung
US6918377B2 (en) Inward-opening variable fuel injection nozzle
US5505384A (en) Rate shaping control valve for fuel injection nozzle
JP4116448B2 (ja) 内燃機関のための燃料噴射弁
US6616070B1 (en) Fuel injector
PL201040B1 (pl) Paliwowy zawór wtryskowy do silników spalinowych
US20050224598A1 (en) Fuel injection valve for internal combustion engines
US6877483B2 (en) Fuel injector arrangement
EP2041424B1 (de) Düsenanordnung, kraftstoffeinspritzdüse und verbrennungsmotor mit solch einer einspritzdüse
WO2002046595A2 (en) Pump system with high pressure restriction
US20060202052A1 (en) Fuel injection valve comprising two coaxial valve needles
US6161773A (en) Fuel injector nozzle with guide to check clearance passage providing injection rate shaping
US20060060673A1 (en) Injector with separately controllable injector needles
GB2340542A (en) Direct control fuel injector with a dual flow rate orifice
JP3932688B2 (ja) 内燃機関用燃料噴射装置
US6732949B1 (en) Fuel injection valve for internal combustion engines
JP2003106235A (ja) 燃料噴射装置
US6568369B1 (en) Common rail injector with separately controlled pilot and main injection
US6129072A (en) Hydraulically actuated device having a ball valve member
US20070204837A1 (en) Fuel Injector With Multi-Part, Directly-Controlled Injection Valve Member
US6173699B1 (en) Hydraulically-actuated fuel injector with electronically actuated spill valve
US20010020467A1 (en) Pressure-intensifying hydraulically-actuated electronically-controlled fuel injection system with individual mechanical unit pumps

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: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

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: 20060413