EP1892409A3 - Fuel injection device - Google Patents

Fuel injection device Download PDF

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Publication number
EP1892409A3
EP1892409A3 EP07014372A EP07014372A EP1892409A3 EP 1892409 A3 EP1892409 A3 EP 1892409A3 EP 07014372 A EP07014372 A EP 07014372A EP 07014372 A EP07014372 A EP 07014372A EP 1892409 A3 EP1892409 A3 EP 1892409A3
Authority
EP
European Patent Office
Prior art keywords
pressure
chamber
booster
leakage line
injector
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
EP07014372A
Other languages
German (de)
French (fr)
Other versions
EP1892409A2 (en
EP1892409B1 (en
Inventor
Christian Klüting
Christoph Kohnen
Rene Böhm
Udo Kreissig
Peter Dr. Voigt
Danny Weigel
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP1892409A2 publication Critical patent/EP1892409A2/en
Publication of EP1892409A3 publication Critical patent/EP1892409A3/en
Application granted granted Critical
Publication of EP1892409B1 publication Critical patent/EP1892409B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and 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
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
    • 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
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator

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

Die Erfindung betrifft eine Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine, insbesondere eines Kraftfahrzeugs, mit einem Druckspeicherraum (24) (common rail) und einem Injektor (10), in dem ein axial verschiebbarer Einspritzkolben (12) einen Steuerraum (14) von einem Druckraum (16) trennt, einer Leckageleitung (42), einem Druckverstärker (28), in dem ein axial verschiebbarer Druckverstärkerkolben (30) einen Verstärkerraum (32), einen Federraum (34) und einen Hochdruckraum (36) voneinander trennt, und einer Verbindungsleitung (38), welche den Druckspeicherraum (24) mit dem Druckraum (16) des Injektors (10) verbindet. Hierbei ist der Hochdruckraum (36) des Druckverstärkers (28) über ein erstes Rückschlagventil (56), welches in Richtung der Leckageleitung (42) sperrt, der Federraum (34) des Druckverstärkers (28) permanent mit der Leckageleitung (42) und der Verstärkerraum (32) des Druckverstärkers (28) mit einem ersten 3/2-Wegeventil (40), welches den Verstärkerraum (32) des Druckverstärkers (28) wahlweise mit dem Druckspeicherraum (24) oder der Leckageleitung (42) verbindet, verbunden, wobei ein zweites 3/2-Wegeventil (44) in der Verbindungsleitung (38) zwischen Druckspeicherraum (24) und Druckraum (16) des Injektors (10) vorgesehen ist, welches den Druckraum (16) des Injektors (10) wahlweise mit dem Druckspeicherraum (24) oder der Leckageleitung (42) verbindet, wobei in der Leckageleitung (42) ein Zwischenspeicher (54) und ein Druckregelventil (52) angeordnet ist.

Figure imgaf001
The invention relates to a fuel injection device for an internal combustion engine, in particular of a motor vehicle, having an accumulator chamber (common rail) and an injector (10), in which an axially displaceable injection piston (12) controls a control chamber (14) from a pressure chamber (16). a leakage line (42), a pressure booster (28), in which an axially displaceable pressure booster piston (30) an amplifier chamber (32), a spring chamber (34) and a high-pressure chamber (36) separated from each other, and a connecting line (38), which connects the pressure storage space (24) with the pressure chamber (16) of the injector (10). Here, the high-pressure chamber (36) of the pressure intensifier (28) via a first check valve (56) which locks in the direction of the leakage line (42), the spring chamber (34) of the pressure booster (28) permanently with the leakage line (42) and the booster chamber (32) of the pressure booster (28) having a first 3/2-way valve (40) which connects the booster chamber (32) of the pressure booster (28) selectively to the pressure storage space (24) or the leakage line (42) connected, wherein a second 3/2-way valve (44) in the connecting line (38) between pressure accumulator space (24) and pressure chamber (16) of the injector (10) is provided which the pressure chamber (16) of the injector (10) optionally with the pressure accumulator space (24 ) or the leakage line (42), wherein in the leakage line (42) has a buffer (54) and a pressure control valve (52) is arranged.
Figure imgaf001
EP07014372A 2006-08-22 2007-07-21 Fuel injection device Not-in-force EP1892409B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006039263A DE102006039263A1 (en) 2006-08-22 2006-08-22 Fuel injector

Publications (3)

Publication Number Publication Date
EP1892409A2 EP1892409A2 (en) 2008-02-27
EP1892409A3 true EP1892409A3 (en) 2009-05-27
EP1892409B1 EP1892409B1 (en) 2010-12-15

Family

ID=38669644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07014372A Not-in-force EP1892409B1 (en) 2006-08-22 2007-07-21 Fuel injection device

Country Status (3)

Country Link
EP (1) EP1892409B1 (en)
AT (1) ATE491883T1 (en)
DE (2) DE102006039263A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014210779B4 (en) 2014-06-05 2026-06-11 Volkswagen Aktiengesellschaft Fuel injection device
GB2574841A (en) * 2018-06-19 2019-12-25 Rklab Ag Injector apparatus
DE102020212697B4 (en) 2020-10-08 2022-08-25 Ford Global Technologies, Llc injector, diesel engine and motor vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19910970A1 (en) * 1999-03-12 2000-09-28 Bosch Gmbh Robert Fuel injector
DE19939421A1 (en) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Combined stroke / pressure controlled fuel injection method and system for an internal combustion engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512270A1 (en) 1995-04-01 1996-09-26 Mtu Friedrichshafen Gmbh Fuel injection device for diesel engine
DE19939448A1 (en) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Injector
DE10164395A1 (en) * 2001-12-28 2003-07-17 Bosch Gmbh Robert Fuel injection device for IC engine has leakage channel connecting control pressure space for valve piston to discharge bore

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19910970A1 (en) * 1999-03-12 2000-09-28 Bosch Gmbh Robert Fuel injector
DE19939421A1 (en) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Combined stroke / pressure controlled fuel injection method and system for an internal combustion engine

Also Published As

Publication number Publication date
ATE491883T1 (en) 2011-01-15
DE502007005929D1 (en) 2011-01-27
EP1892409A2 (en) 2008-02-27
DE102006039263A1 (en) 2008-03-06
EP1892409B1 (en) 2010-12-15

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