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EP1359319A3 - Fuel injector - Google Patents

Fuel injector Download PDF

Info

Publication number
EP1359319A3
EP1359319A3 EP03252437A EP03252437A EP1359319A3 EP 1359319 A3 EP1359319 A3 EP 1359319A3 EP 03252437 A EP03252437 A EP 03252437A EP 03252437 A EP03252437 A EP 03252437A EP 1359319 A3 EP1359319 A3 EP 1359319A3
Authority
EP
European Patent Office
Prior art keywords
valve needle
fuel
pressure
high pressure
delivery chamber
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
EP03252437A
Other languages
German (de)
French (fr)
Other versions
EP1359319A2 (en
EP1359319B1 (en
Inventor
P. Buckley
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies 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
Application filed by Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of EP1359319A2 publication Critical patent/EP1359319A2/en
Publication of EP1359319A3 publication Critical patent/EP1359319A3/en
Application granted granted Critical
Publication of EP1359319B1 publication Critical patent/EP1359319B1/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
    • 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
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift

Landscapes

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

Abstract

A fuel injector for an internal combustion engine includes a valve needle (14) having a first surface which is engageable with a valve needle seating to control fuel flow between a delivery chamber (20) and an outlet and a high pressure supply passage (22) for supplying fuel at high pressure to the delivery chamber (20). A thrust surface of the valve needle (14) is exposed to fuel pressure within the delivery chamber (20) such that a force is applied to the valve needle (14) to urge the needle away from the valve seating. The injector also includes a pressure chamber (32) in communication with the high pressure supply passage (22) which is defined, in part, by a surface associated with the valve needle (14) at an end thereof remote from the outlet, and means (34, 40; 22, 56, 48, 54) for generating a variable difference in fuel pressure between the delivery chamber (20) and the pressure chamber (32) in dependence upon the rate of increase of fuel pressure within the high pressure supply passage (22), thereby to provide a variable nozzle opening pressure at which the valve needle is caused to lift from the valve needle seating to initiate injection.
EP03252437A 2002-04-20 2003-04-16 Fuel injector Expired - Lifetime EP1359319B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0209049.6A GB0209049D0 (en) 2002-04-20 2002-04-20 Fuel injector
GB0209049 2002-04-20

Publications (3)

Publication Number Publication Date
EP1359319A2 EP1359319A2 (en) 2003-11-05
EP1359319A3 true EP1359319A3 (en) 2004-11-10
EP1359319B1 EP1359319B1 (en) 2007-05-23

Family

ID=9935192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03252437A Expired - Lifetime EP1359319B1 (en) 2002-04-20 2003-04-16 Fuel injector

Country Status (4)

Country Link
EP (1) EP1359319B1 (en)
AT (1) ATE363024T1 (en)
DE (1) DE60313914T2 (en)
GB (1) GB0209049D0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10323562A1 (en) * 2003-05-26 2004-12-30 Robert Bosch Gmbh Fuel injection device for an internal combustion engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0239259A1 (en) * 1986-03-21 1987-09-30 General Motors Corporation Two-stage, hydraulic-assisted fuel injection nozzle
EP0767304A1 (en) * 1995-10-04 1997-04-09 LUCAS INDUSTRIES public limited company Injector
WO2000015959A1 (en) * 1998-09-10 2000-03-23 International Truck And Engine Corporation Fuel injector
EP1067284A1 (en) * 1999-07-03 2001-01-10 Robert Bosch Gmbh Fuel injection valve
US6269795B1 (en) * 1997-11-27 2001-08-07 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
WO2002075149A1 (en) * 2001-03-15 2002-09-26 Robert Bosch Gmbh Fuel-injection valve for internal combustion engines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0239259A1 (en) * 1986-03-21 1987-09-30 General Motors Corporation Two-stage, hydraulic-assisted fuel injection nozzle
EP0767304A1 (en) * 1995-10-04 1997-04-09 LUCAS INDUSTRIES public limited company Injector
US6269795B1 (en) * 1997-11-27 2001-08-07 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
WO2000015959A1 (en) * 1998-09-10 2000-03-23 International Truck And Engine Corporation Fuel injector
EP1067284A1 (en) * 1999-07-03 2001-01-10 Robert Bosch Gmbh Fuel injection valve
WO2002075149A1 (en) * 2001-03-15 2002-09-26 Robert Bosch Gmbh Fuel-injection valve for internal combustion engines

Also Published As

Publication number Publication date
EP1359319A2 (en) 2003-11-05
DE60313914D1 (en) 2007-07-05
EP1359319B1 (en) 2007-05-23
GB0209049D0 (en) 2002-05-29
DE60313914T2 (en) 2007-09-20
ATE363024T1 (en) 2007-06-15

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