EP1114247A1 - Injecteur pour rampe d'alimentation - Google Patents

Injecteur pour rampe d'alimentation

Info

Publication number
EP1114247A1
EP1114247A1 EP00949125A EP00949125A EP1114247A1 EP 1114247 A1 EP1114247 A1 EP 1114247A1 EP 00949125 A EP00949125 A EP 00949125A EP 00949125 A EP00949125 A EP 00949125A EP 1114247 A1 EP1114247 A1 EP 1114247A1
Authority
EP
European Patent Office
Prior art keywords
common rail
pressure
chamber
nozzle needle
fuel
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
EP00949125A
Other languages
German (de)
English (en)
Other versions
EP1114247B1 (fr
Inventor
Friedrich Boecking
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.)
Robert Bosch GmbH
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 EP1114247A1 publication Critical patent/EP1114247A1/fr
Application granted granted Critical
Publication of EP1114247B1 publication Critical patent/EP1114247B1/fr
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
    • 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

Definitions

  • a high-pressure pump delivers the fuel to the central high-pressure accumulator, which is referred to as the common rail.
  • High-pressure lines lead from the high-pressure accumulator to the individual injectors that are assigned to the engine cylinders.
  • the injectors are individually controlled by the engine electronics.
  • the rail pressure is present in the pressure chamber and on the control valve. When the control valve opens, the nozzle needle lifts off its seat and high-pressure fuel is injected into the combustion chamber of the internal combustion engine.
  • Another special embodiment of the invention is characterized in that the nozzle needle is guided between the control chamber and the pressure chamber.
  • the nozzle needle of the injector according to the invention can be made shorter than conventional nozzle needles. A guide is therefore sufficient to ensure that the injector functions properly.
  • a central axial bore 12 extends in the nozzle needle 4 up to the height of a pressure chamber 15.
  • two radial through holes 13 and 14 are arranged crosswise in the nozzle needle 4. The radial bores 13 and 14 create a connection between the pressure chamber 15 and the axial bore 12.

Landscapes

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

Abstract

L'invention concerne un injecteur pour rampe d'alimentation servant à injecter du carburant dans un système d'injection pour rampe d'alimentation d'un moteur à combustion interne. L'injecteur selon l'invention comprend un carter d'injecteur (1) pourvu d'une entrée de carburant (11) reliée à un réservoir de carburant central à haute pression situé à l'extérieur du carter d'injecteur (1) et à une chambre de pression (15) située à l'intérieur du carter d'injecteur (1) et hors de laquelle du carburant sous pression est injecté en fonction de la position d'une soupape de commande (18). Une aiguille de buse (4) mobile en avant et en arrière dans un évidement longitudinal (3) du carter d'injecteur (1) axialement contre la force de précontrainte d'un ressort de buse (8) se soulève d'un siège lorsque la pression dans la chambre de pression (15) est supérieure à la pression dans une chambre de commande (16).
EP00949125A 1999-07-16 2000-06-24 Injecteur pour rampe d'alimentation Expired - Lifetime EP1114247B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19933328 1999-07-16
DE19933328A DE19933328A1 (de) 1999-07-16 1999-07-16 Common-Rail-Injektor
PCT/DE2000/002060 WO2001006111A1 (fr) 1999-07-16 2000-06-24 Injecteur pour rampe d'alimentation

Publications (2)

Publication Number Publication Date
EP1114247A1 true EP1114247A1 (fr) 2001-07-11
EP1114247B1 EP1114247B1 (fr) 2004-10-13

Family

ID=7914977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00949125A Expired - Lifetime EP1114247B1 (fr) 1999-07-16 2000-06-24 Injecteur pour rampe d'alimentation

Country Status (6)

Country Link
US (1) US6568368B1 (fr)
EP (1) EP1114247B1 (fr)
JP (1) JP2003504556A (fr)
KR (1) KR100692885B1 (fr)
DE (2) DE19933328A1 (fr)
WO (1) WO2001006111A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10054991A1 (de) * 2000-11-07 2002-05-29 Bosch Gmbh Robert Druckgesteuerter Injektor zum Einspritzen von Kraftstoff mit Doppelventil
DE10155187B4 (de) * 2001-11-12 2007-08-16 L'orange Gmbh Einspritzinjektor für Brennkraftmaschinen
DE10160490B4 (de) * 2001-12-08 2005-10-06 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung, Kraftstoffsystem sowie Brennkraftmaschine
DE10326043A1 (de) * 2003-06-10 2004-12-30 Robert Bosch Gmbh Einspritzdüse für Brennkraftmaschinen
US7464697B2 (en) 2005-08-19 2008-12-16 The United States Of America, As Represented By The Administrator Of The U.S. Environmental Protection Agency High-pressure fuel intensifier system
DE102007011685A1 (de) * 2007-03-09 2008-09-11 Robert Bosch Gmbh Kraftstoffinjektor mit verbessertem Steuerventil
WO2018098308A1 (fr) * 2016-11-22 2018-05-31 Cummins Inc. Procédé de commutation d'injecteur entre un état d'injection et un état de drain

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3442451A (en) * 1967-06-14 1969-05-06 Gen Motors Corp Dual stage accumulator type fuel injector
US3669354A (en) * 1970-09-08 1972-06-13 J & T Eng Ascot Ltd Fluid injectors
US4462368A (en) * 1980-07-10 1984-07-31 Diesel Kiki Company, Ltd. Fuel injection system for internal combustion engine
US4667638A (en) * 1984-04-17 1987-05-26 Nippon Soken, Inc. Fuel injection apparatus for internal combustion engine
DE3767260D1 (de) * 1986-09-25 1991-02-14 Ganser Hydromag Kraftstoffeinspritzventil.
US5301875A (en) * 1990-06-19 1994-04-12 Cummins Engine Company, Inc. Force balanced electronically controlled fuel injector
US5647536A (en) * 1995-01-23 1997-07-15 Cummins Engine Company, Inc. Injection rate shaping nozzle assembly for a fuel injector
DE19647304C1 (de) * 1996-11-15 1998-01-22 Daimler Benz Ag Kraftstoffeinspritzanlage für eine Brennkraftmaschine
US5860597A (en) * 1997-03-24 1999-01-19 Cummins Engine Company, Inc. Injection rate shaping nozzle assembly for a fuel injector
US5899389A (en) * 1997-06-02 1999-05-04 Cummins Engine Company, Inc. Two stage fuel injector nozzle assembly
DE19724637A1 (de) * 1997-06-11 1998-12-17 Bosch Gmbh Robert Einspritzventil
DE19744518A1 (de) * 1997-10-09 1999-04-15 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
US6079641A (en) * 1998-10-13 2000-06-27 Caterpillar Inc. Fuel injector with rate shaping control through piezoelectric nozzle lift
GB9916464D0 (en) * 1999-07-14 1999-09-15 Lucas Ind Plc Fuel injector
US6408821B1 (en) * 2000-12-19 2002-06-25 Caterpillar Inc. Fuel injection system with common actuation device and engine using same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0106111A1 *

Also Published As

Publication number Publication date
JP2003504556A (ja) 2003-02-04
KR100692885B1 (ko) 2007-03-12
DE19933328A1 (de) 2001-01-25
KR20010075090A (ko) 2001-08-09
WO2001006111A1 (fr) 2001-01-25
DE50008218D1 (en) 2004-11-18
US6568368B1 (en) 2003-05-27
EP1114247B1 (fr) 2004-10-13

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