EP0976924A3 - Servo valve for an injector and injector - Google Patents

Servo valve for an injector and injector Download PDF

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Publication number
EP0976924A3
EP0976924A3 EP99112980A EP99112980A EP0976924A3 EP 0976924 A3 EP0976924 A3 EP 0976924A3 EP 99112980 A EP99112980 A EP 99112980A EP 99112980 A EP99112980 A EP 99112980A EP 0976924 A3 EP0976924 A3 EP 0976924A3
Authority
EP
European Patent Office
Prior art keywords
valve
chamber
injection
injector
servo 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.)
Granted
Application number
EP99112980A
Other languages
German (de)
French (fr)
Other versions
EP0976924A2 (en
EP0976924B1 (en
Inventor
Heinz Lixl
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0976924A2 publication Critical patent/EP0976924A2/en
Publication of EP0976924A3 publication Critical patent/EP0976924A3/en
Application granted granted Critical
Publication of EP0976924B1 publication Critical patent/EP0976924B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • F02M63/0012—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
    • 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
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Das Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine weist einen Steuerraum (4) auf, der über eine Zulaufbohrung (2) mit einem Raum (20) und eine Zulaufdrossel (3) mit einem Hochdruckspeicher in Verbindung steht und der über eine Ablaufdrossel (10) in einer Ablaufbohrung (9) und über die Ventilkammer (22) des Servoventils (12) mit einem drucklosen Rücklauf (14) zu einem Kraftstofftank in Verbindung gebracht werden kann. Der im Steuerraum (4) herrschende Druck wirkt auf einen beweglichen Düsenkörper (6) ein, der mit einer Düsennadel versehen ist, die bei der Bewegung des Düsenkörpers (6) Einspritzlöcher (7) freigibt und verschließt. Das Servoventil (12) umfaßt einen beweglichen Ventilkörper (26), der von einem Aktor (18) betätigt wird und der selektiv an einem Anschlag (24) zwischen dem Raum (20) und der Ventilkammer (22) oder an einem Ventilsitz (28) zwischen der Ventilkammer (22) und dem Rücklauf (14) zur Anlage kommen kann. Wenn der Ventilkörper (26) am Ventilsitz (28) anliegt, kann der Kraftstoff zum Schließen des Einspritzventils über die Zulaufdrossel (3) und außerdem über die Ventilkammer (22) des Servoventils und die Ablaufdrossel (10) in den Steuerraum (4) strömen.

Figure 00000001
The injection valve for the injection of fuel into an internal combustion engine has a control chamber (4), which is connected to a chamber (20) via an inlet bore (2) and an inlet throttle (3) to a high-pressure accumulator and which is connected via an outlet throttle (10 ) in a drain hole (9) and via the valve chamber (22) of the servo valve (12) with an unpressurized return (14) can be connected to a fuel tank. The pressure prevailing in the control chamber (4) acts on a movable nozzle body (6) which is provided with a nozzle needle which, when the nozzle body (6) moves, releases and closes injection holes (7). The servo valve (12) comprises a movable valve body (26) which is actuated by an actuator (18) and which is selectively connected to a stop (24) between the space (20) and the valve chamber (22) or to a valve seat (28) can come to rest between the valve chamber (22) and the return (14). When the valve body (26) rests on the valve seat (28), the fuel for the closing of the injection valve can flow into the control chamber (4) via the inlet throttle (3) and also via the valve chamber (22) of the servo valve and the outlet throttle (10).
Figure 00000001
EP99112980A 1998-07-31 1999-07-05 Injector with a servo valve Expired - Lifetime EP0976924B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19834667 1998-07-31
DE19834667 1998-07-31

Publications (3)

Publication Number Publication Date
EP0976924A2 EP0976924A2 (en) 2000-02-02
EP0976924A3 true EP0976924A3 (en) 2001-06-13
EP0976924B1 EP0976924B1 (en) 2003-09-17

Family

ID=7876057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99112980A Expired - Lifetime EP0976924B1 (en) 1998-07-31 1999-07-05 Injector with a servo valve

Country Status (2)

Country Link
EP (1) EP0976924B1 (en)
DE (1) DE59906995D1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19939450A1 (en) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Fuel injection device for internal combustion engines
JP4048699B2 (en) 1999-11-10 2008-02-20 株式会社デンソー Fuel injection valve
DE10015268A1 (en) 2000-03-28 2001-10-04 Siemens Ag Injector with bypass throttle
DE10024703A1 (en) * 2000-05-18 2001-11-22 Bosch Gmbh Robert Injection arrangement for fuel storage injection system has valve unit blocking auxiliary channel and outlet path in alternation
DE10024702A1 (en) * 2000-05-18 2001-11-22 Bosch Gmbh Robert Fuel injector for storage injection system includes bypass channel injecting into outlet path at valve chamber
DE10063698A1 (en) 2000-12-20 2002-07-04 Siemens Ag High-pressure injection system with a control throttle as a cascade throttle
JP3556921B2 (en) * 2001-04-27 2004-08-25 株式会社日本自動車部品総合研究所 Fuel injection valve
DE10123775B4 (en) * 2001-05-16 2005-01-20 Robert Bosch Gmbh Fuel injection device for internal combustion engines, in particular common rail injector, and fuel system and internal combustion engine
DE10131642A1 (en) * 2001-06-29 2003-01-16 Bosch Gmbh Robert Fuel injector with variable control room pressurization
DE10131618A1 (en) * 2001-06-29 2003-01-23 Bosch Gmbh Robert Fuel injector with switchable control room inlet
DE10131619A1 (en) * 2001-06-29 2003-01-23 Bosch Gmbh Robert Fuel injector with injection course shaping
DE10131640A1 (en) * 2001-06-29 2003-01-16 Bosch Gmbh Robert Fuel injector with injection course shaping through switchable throttle elements
DE10132249A1 (en) * 2001-07-04 2003-01-23 Bosch Gmbh Robert Fuel injector with force-balanced control valve
JP3864764B2 (en) * 2001-11-22 2007-01-10 株式会社デンソー Fuel injection valve
US7331329B2 (en) 2002-07-15 2008-02-19 Caterpillar Inc. Fuel injector with directly controlled highly efficient nozzle assembly and fuel system using same
DE102005046743B3 (en) * 2005-09-29 2007-05-16 Siemens Ag Method for determining time point of stopper of valve body in drain valve actuated by electromechanical actuator, involves electrical control of actuator during load phase, so that stroke produced by actuator opens drain valve mechanically
US8544771B2 (en) 2006-03-03 2013-10-01 Ganser-Hydromag Ag Fuel injection valve for internal combustion engines
DE102010001612A1 (en) * 2010-02-05 2011-08-11 Robert Bosch GmbH, 70469 fuel injector
DE102011015753A1 (en) 2011-03-31 2012-10-04 Raphael Füchslin Injector

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199632A1 (en) * 1985-04-19 1986-10-29 Societe Alsacienne De Constructions Mecaniques De Mulhouse Fuel injection system for diesel engines
EP0426205A2 (en) * 1985-12-02 1991-05-08 Marco Alfredo Ganser Device for the control of electro-hydraulically actuated fuel injectors
EP0740067A2 (en) * 1995-04-27 1996-10-30 Isuzu Motors Limited Accumulator-type fuel injection system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199632A1 (en) * 1985-04-19 1986-10-29 Societe Alsacienne De Constructions Mecaniques De Mulhouse Fuel injection system for diesel engines
EP0426205A2 (en) * 1985-12-02 1991-05-08 Marco Alfredo Ganser Device for the control of electro-hydraulically actuated fuel injectors
EP0740067A2 (en) * 1995-04-27 1996-10-30 Isuzu Motors Limited Accumulator-type fuel injection system

Also Published As

Publication number Publication date
DE59906995D1 (en) 2003-10-23
EP0976924A2 (en) 2000-02-02
EP0976924B1 (en) 2003-09-17

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