ATE545780T1 - FUEL INJECTION DEVICE FOR AN INTERNAL COMBUSTION ENGINE - Google Patents

FUEL INJECTION DEVICE FOR AN INTERNAL COMBUSTION ENGINE

Info

Publication number
ATE545780T1
ATE545780T1 AT07858098T AT07858098T ATE545780T1 AT E545780 T1 ATE545780 T1 AT E545780T1 AT 07858098 T AT07858098 T AT 07858098T AT 07858098 T AT07858098 T AT 07858098T AT E545780 T1 ATE545780 T1 AT E545780T1
Authority
AT
Austria
Prior art keywords
pintle
spray aperture
upstream
annular channel
combustion engine
Prior art date
Application number
AT07858098T
Other languages
German (de)
Inventor
Giovanni Corbinelli
Guy Hoffmann
Didier Robart
Original Assignee
Delphi Tech Inc
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
Priority claimed from GBGB0625770.3A external-priority patent/GB0625770D0/en
Application filed by Delphi Tech Inc filed Critical Delphi Tech Inc
Application granted granted Critical
Publication of ATE545780T1 publication Critical patent/ATE545780T1/en

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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • F02M61/08—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 the valves opening in direction of fuel flow
    • 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
    • F02M61/06—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 the valves being furnished at seated ends with pintle or plug shaped extensions
    • 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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188

Abstract

A fuel injector comprising an injector body (10) having a spray aperture (12); a pintle (14) extending within the injector body for axial movement between a closed position and an open position; said pintle head (16) comprising a tapered portion (18) engageable against the valve seat of the spray aperture and a cylindrical portion (22) upstream of said tapered portion, an annular channel (26) being provided defining a first part of a flow passage upstream of the spray aperture (12), wherein a discontinuity (30, 50) is provided downstream of the annular channel (26) and upstream of the spray aperture to generate cavitation when the pintle stroke exceeds a predetermined limit to thereby generate a virtual channel of constant cross section downstream of the annular channel (26) whereby the flow rate of the fuel flowing through said spray aperture is substantially independent of the stroke of the pintle when the pintle is in its open position.
AT07858098T 2006-12-22 2007-12-21 FUEL INJECTION DEVICE FOR AN INTERNAL COMBUSTION ENGINE ATE545780T1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0625770.3A GB0625770D0 (en) 2006-12-22 2006-12-22 Fuel injector for an internal combustion engine
EP07250160 2007-01-16
PCT/EP2007/064487 WO2008077953A1 (en) 2006-12-22 2007-12-21 Fuel injector for an internal combustion engine

Publications (1)

Publication Number Publication Date
ATE545780T1 true ATE545780T1 (en) 2012-03-15

Family

ID=39301278

Family Applications (1)

Application Number Title Priority Date Filing Date
AT07858098T ATE545780T1 (en) 2006-12-22 2007-12-21 FUEL INJECTION DEVICE FOR AN INTERNAL COMBUSTION ENGINE

Country Status (5)

Country Link
EP (1) EP2097636B1 (en)
JP (1) JP2010521605A (en)
KR (1) KR20090090400A (en)
AT (1) ATE545780T1 (en)
WO (1) WO2008077953A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2825998A1 (en) * 1978-06-14 1980-01-03 Bosch Gmbh Robert FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES
DE3914636A1 (en) * 1989-05-03 1990-11-08 Bosch Gmbh Robert DEVICE FOR COMBINED BLOWING OUT OF FUEL AND AIR FOR FUEL INJECTION SYSTEMS FROM INTERNAL COMBUSTION ENGINES
GB9008403D0 (en) * 1990-04-12 1990-06-13 Lucas Ind Plc Fuel injection nozzle
DE19623713B4 (en) 1996-06-14 2008-06-19 Robert Bosch Gmbh Injection valve, in particular for the direct injection of fuel into a combustion chamber of an internal combustion engine
JP2006307678A (en) * 2005-04-26 2006-11-09 Denso Corp Fuel injection nozzle

Also Published As

Publication number Publication date
JP2010521605A (en) 2010-06-24
EP2097636A1 (en) 2009-09-09
EP2097636B1 (en) 2012-02-15
WO2008077953A1 (en) 2008-07-03
KR20090090400A (en) 2009-08-25

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