EP1088985A3 - High pressure fuel injector for an internal combustion engine - Google Patents

High pressure fuel injector for an internal combustion engine Download PDF

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Publication number
EP1088985A3
EP1088985A3 EP00121484A EP00121484A EP1088985A3 EP 1088985 A3 EP1088985 A3 EP 1088985A3 EP 00121484 A EP00121484 A EP 00121484A EP 00121484 A EP00121484 A EP 00121484A EP 1088985 A3 EP1088985 A3 EP 1088985A3
Authority
EP
European Patent Office
Prior art keywords
bore
control piston
nozzle
injector
combustion engine
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
EP00121484A
Other languages
German (de)
French (fr)
Other versions
EP1088985B1 (en
EP1088985A2 (en
Inventor
Ulrich Dr. Augustin
Dirk Dr. Baranowski
Wilhelm Frank
Wendelin KLÜGL
Günter LEWENTZ
Heinz Lixl
Gerd Dr. Schmutzler
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 EP1088985A2 publication Critical patent/EP1088985A2/en
Publication of EP1088985A3 publication Critical patent/EP1088985A3/en
Application granted granted Critical
Publication of EP1088985B1 publication Critical patent/EP1088985B1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift

Landscapes

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

Abstract

Die Erfindung betrifft einen Injektor (10), der einen Injektorkörper (20) umfaßt, welcher einen Injektorkörperabschnitt (30) und einen Düsenkörperabschnitt (40) aufweist, mit einer sich axial erstreckenden Bohrung (50), eine in diese Bohrung (50) mündende Kraftstoffzuführbohrung (60), einen in der axialen Bohrung (50) verlagerbaren Steuerkolben (70), einen Steuerraum (100) oberhalb des Steuerkolbens (70), ein den Steuerraum (100) entlastendes ansteuerbares Ventil (90), eine sich durch die axiale Bohrung (50) erstreckende, mit dem Steuerkolben (70) in Verbindung stehende Düsennadel (80) zum Öffnen und Schließen einer Einspritzdüse, und eine die Düsennadel (80) in einen Nadelsitz (170) im Bereich der Einspritzdüse vorspannende Düsenfeder (160). Bei dem Injektor (10) mündet die Kraftstoffzuführbohrung (60) in einem Bereich unterhalb des Steuerkolbens (70) in die axiale Bohrung (50) und die Zufuhr von Kraftstoff in den Steuerraum (100) aus dem Bereich der axialen Bohrung (50) unterhalb des Steuerkolbens (70) erfolgt durch eine Bohrung (110) im Steuerkolben (70).

Figure 00000001
The invention relates to an injector (10), which comprises an injector body (20), which has an injector body section (30) and a nozzle body section (40), with an axially extending bore (50), a fuel supply bore opening into this bore (50) (60), a control piston (70) displaceable in the axial bore (50), a control chamber (100) above the control piston (70), a controllable valve (90) which relieves the control chamber (100), a valve (90) through the axial bore ( 50) extending nozzle needle (80) connected to the control piston (70) for opening and closing an injection nozzle, and a nozzle spring (160) prestressing the nozzle needle (80) into a needle seat (170) in the region of the injection nozzle. In the injector (10), the fuel supply bore (60) opens into the area below the control piston (70) into the axial bore (50) and the supply of fuel into the control chamber (100) from the area of the axial bore (50) below the Control piston (70) takes place through a bore (110) in the control piston (70).
Figure 00000001
EP20000121484 1999-09-29 2000-09-29 High pressure fuel injector for an internal combustion engine Expired - Lifetime EP1088985B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19946766 1999-09-29
DE1999146766 DE19946766C2 (en) 1999-09-29 1999-09-29 Injector for an internal combustion engine with direct injection

Publications (3)

Publication Number Publication Date
EP1088985A2 EP1088985A2 (en) 2001-04-04
EP1088985A3 true EP1088985A3 (en) 2003-11-19
EP1088985B1 EP1088985B1 (en) 2006-03-22

Family

ID=7923774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000121484 Expired - Lifetime EP1088985B1 (en) 1999-09-29 2000-09-29 High pressure fuel injector for an internal combustion engine

Country Status (2)

Country Link
EP (1) EP1088985B1 (en)
DE (2) DE19946766C2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10132450B4 (en) * 2001-07-04 2010-02-11 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
DE10154576C1 (en) * 2001-11-07 2003-04-17 Bosch Gmbh Robert Fuel injector for direct fuel injection IC engine has control space for operation of jet needle vented under control of magnetic valve positioned above control space within injector body
DE10160263A1 (en) 2001-12-07 2003-06-18 Bosch Gmbh Robert Fuel injection device for an internal combustion engine
DE10205185A1 (en) * 2002-02-08 2003-08-21 Bosch Gmbh Robert Fuel injection device for an internal combustion engine
DE10240440C1 (en) * 2002-09-02 2003-12-24 Siemens Ag Fuel injector, in particular common rail diesel injector
DE10253721A1 (en) * 2002-11-19 2004-06-03 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
JP3891974B2 (en) * 2003-10-01 2007-03-14 株式会社日本自動車部品総合研究所 Fuel injection valve
DE102004024119B4 (en) * 2004-05-14 2006-04-20 Siemens Ag Nozzle assembly and injector
AT500774B8 (en) * 2004-08-06 2007-02-15 Bosch Gmbh Robert DEVICE FOR INJECTING FUEL IN THE COMBUSTION ENGINE OF AN INTERNAL COMBUSTION ENGINE
DE102006029392A1 (en) * 2006-06-27 2008-01-03 Robert Bosch Gmbh injector
DE102007035752A1 (en) * 2007-07-31 2009-02-05 Robert Bosch Gmbh Fuel injector with a seated on the cone valve seat of a nozzle needle centering as a guide for the nozzle needle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4826080A (en) * 1985-12-02 1989-05-02 Ganser Marco A Fuel injection device for internal combustion engines
DE4203343C1 (en) * 1992-02-06 1993-05-19 Mtu Friedrichshafen Gmbh IC engine fuel injection nozzle - has combustion chamber facing openings or spray holes coverable by peripheral closure wall parts
US5671715A (en) * 1995-04-27 1997-09-30 Nipon Soken, Inc. Fuel injection device
US5860597A (en) * 1997-03-24 1999-01-19 Cummins Engine Company, Inc. Injection rate shaping nozzle assembly for a fuel injector
EP0921301A2 (en) * 1997-12-06 1999-06-09 LUCAS INDUSTRIES public limited company Fuel injector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4826080A (en) * 1985-12-02 1989-05-02 Ganser Marco A Fuel injection device for internal combustion engines
DE4203343C1 (en) * 1992-02-06 1993-05-19 Mtu Friedrichshafen Gmbh IC engine fuel injection nozzle - has combustion chamber facing openings or spray holes coverable by peripheral closure wall parts
US5671715A (en) * 1995-04-27 1997-09-30 Nipon Soken, Inc. Fuel injection device
US5860597A (en) * 1997-03-24 1999-01-19 Cummins Engine Company, Inc. Injection rate shaping nozzle assembly for a fuel injector
EP0921301A2 (en) * 1997-12-06 1999-06-09 LUCAS INDUSTRIES public limited company Fuel injector

Also Published As

Publication number Publication date
DE19946766C2 (en) 2001-07-26
DE19946766A1 (en) 2001-04-26
EP1088985B1 (en) 2006-03-22
DE50012433D1 (en) 2006-05-11
EP1088985A2 (en) 2001-04-04

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