EP1961949A3 - Injector with additional servo-valve - Google Patents

Injector with additional servo-valve Download PDF

Info

Publication number
EP1961949A3
EP1961949A3 EP08100356A EP08100356A EP1961949A3 EP 1961949 A3 EP1961949 A3 EP 1961949A3 EP 08100356 A EP08100356 A EP 08100356A EP 08100356 A EP08100356 A EP 08100356A EP 1961949 A3 EP1961949 A3 EP 1961949A3
Authority
EP
European Patent Office
Prior art keywords
valve
injector
control chamber
additional servo
high pressure
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
EP08100356A
Other languages
German (de)
French (fr)
Other versions
EP1961949A2 (en
EP1961949B1 (en
Inventor
Dirk Vahle
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 EP1961949A2 publication Critical patent/EP1961949A2/en
Publication of EP1961949A3 publication Critical patent/EP1961949A3/en
Application granted granted Critical
Publication of EP1961949B1 publication Critical patent/EP1961949B1/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
    • 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
    • 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
    • F02M47/025—Hydraulically 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
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Abstract

The injector has a high pressure connector (2,3) and an actuator control valve with a control fluid-discharge path (18) from a control chamber (20). The control chamber is actively connected with a servo valve (31), by which a fuel discharge path (26) is released or blocked from another control chamber (28), which is supplied with fuel from second high pressure connection. The latter control chamber is actively connected with a needle (7).
EP08100356A 2007-02-13 2008-01-11 Injector with additional servo-valve Not-in-force EP1961949B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007006939A DE102007006939A1 (en) 2007-02-13 2007-02-13 Injector for injecting fuel into combustion chamber of internal-combustion engine, particularly common-rail injector, has control chamber actively connected with servo valve, by which fuel discharge path is released or blocked

Publications (3)

Publication Number Publication Date
EP1961949A2 EP1961949A2 (en) 2008-08-27
EP1961949A3 true EP1961949A3 (en) 2008-09-17
EP1961949B1 EP1961949B1 (en) 2009-11-18

Family

ID=39472735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08100356A Not-in-force EP1961949B1 (en) 2007-02-13 2008-01-11 Injector with additional servo-valve

Country Status (3)

Country Link
EP (1) EP1961949B1 (en)
AT (1) ATE449250T1 (en)
DE (2) DE102007006939A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015114716A1 (en) * 2015-09-03 2017-03-09 Denso Corporation Fuel injector with two fuel inlets
DE102018208859A1 (en) * 2018-06-06 2019-12-12 Robert Bosch Gmbh Method for operating a fuel injector, fuel injector

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2351773A (en) * 1997-02-26 2001-01-10 Caterpillar Inc Hydraulically actuated i.c. engine fuel injector with solenoid-actuated control valve
US20040000600A1 (en) * 2002-06-28 2004-01-01 Cummins Inc. Needle controlled fuel injector with two control valves
WO2004070198A1 (en) * 2003-02-10 2004-08-19 Robert Bosch Gmbh Fuel injection device, particularly for internal combustion engines with direct fuel injection
DE10333692B3 (en) * 2003-07-24 2004-09-30 Robert Bosch Gmbh Fuel injection device for an internal combustion engine comprises a filling chamber connected to a fuel feed line and arranged at each of the ends of two pistons facing away from an actuator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19744723A1 (en) 1997-10-10 1999-04-15 Bosch Gmbh Robert Fuel injector
DE10207227A1 (en) 2002-02-21 2003-09-04 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE602004004254T2 (en) 2004-06-30 2007-07-12 C.R.F. S.C.P.A. Servo valve for controlling an injection valve of an internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2351773A (en) * 1997-02-26 2001-01-10 Caterpillar Inc Hydraulically actuated i.c. engine fuel injector with solenoid-actuated control valve
US20040000600A1 (en) * 2002-06-28 2004-01-01 Cummins Inc. Needle controlled fuel injector with two control valves
WO2004070198A1 (en) * 2003-02-10 2004-08-19 Robert Bosch Gmbh Fuel injection device, particularly for internal combustion engines with direct fuel injection
DE10333692B3 (en) * 2003-07-24 2004-09-30 Robert Bosch Gmbh Fuel injection device for an internal combustion engine comprises a filling chamber connected to a fuel feed line and arranged at each of the ends of two pistons facing away from an actuator

Also Published As

Publication number Publication date
ATE449250T1 (en) 2009-12-15
DE102007006939A1 (en) 2008-08-14
DE502008000183D1 (en) 2009-12-31
EP1961949A2 (en) 2008-08-27
EP1961949B1 (en) 2009-11-18

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