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EP0992675A3 - Fuel system - Google Patents

Fuel system Download PDF

Info

Publication number
EP0992675A3
EP0992675A3 EP99307975A EP99307975A EP0992675A3 EP 0992675 A3 EP0992675 A3 EP 0992675A3 EP 99307975 A EP99307975 A EP 99307975A EP 99307975 A EP99307975 A EP 99307975A EP 0992675 A3 EP0992675 A3 EP 0992675A3
Authority
EP
European Patent Office
Prior art keywords
fuel
control
valve
chamber
injection
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.)
Withdrawn
Application number
EP99307975A
Other languages
German (de)
French (fr)
Other versions
EP0992675A2 (en
Inventor
James Martin Anderton Askew
Alan George Wilson
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
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Publication of EP0992675A2 publication Critical patent/EP0992675A2/en
Publication of EP0992675A3 publication Critical patent/EP0992675A3/en
Withdrawn legal-status Critical Current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
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically

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

A fuel system comprising a fuel pump (10) having a pumping chamber (18), a spill valve (22) operable to control the timing of fuel pressurization by the pump and a fuel injector (36) comprising a valve needle (38) slidable within a bore. A surface associated with the valve needle (38) is exposed to the fuel pressure within a control chamber (50), and an injection control valve (56) is arranged to control the fuel pressure within the control chamber (50). The injection control valve (56) comprises an electromagnetically actuable valve arranged such that when said actuator (62) thereof is energized, the control chamber (50) is exposed to substantially the fuel pressure within the pumping chamber (18) of the fuel pump (10), de-energization of the actuator (62) of the injection control valve (56) permitting the fuel pressure within the control chamber (50) to fall to a level sufficiently low to allow injection of fuel to occur through the fuel injector (36).
EP99307975A 1998-10-09 1999-10-08 Fuel system Withdrawn EP0992675A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9821929 1998-10-09
GBGB9821929.8A GB9821929D0 (en) 1998-10-09 1998-10-09 Fuel system

Publications (2)

Publication Number Publication Date
EP0992675A2 EP0992675A2 (en) 2000-04-12
EP0992675A3 true EP0992675A3 (en) 2000-10-11

Family

ID=10840193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99307975A Withdrawn EP0992675A3 (en) 1998-10-09 1999-10-08 Fuel system

Country Status (2)

Country Link
EP (1) EP0992675A3 (en)
GB (1) GB9821929D0 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE526501T1 (en) 2000-07-10 2011-10-15 Mitsubishi Heavy Ind Ltd FUEL INJECTION DEVICE
SE523498C2 (en) 2001-08-17 2004-04-27 Volvo Teknisk Utveckling Ab Method of controlling fuel injection to a combustion chamber and a fuel injection device for carrying out the method
DE10158660A1 (en) 2001-11-30 2003-06-12 Bosch Gmbh Robert Fuel injection device for an internal combustion engine
GB0215490D0 (en) 2002-07-04 2002-08-14 Delphi Tech Inc Control valve arrangement
GB0216347D0 (en) * 2002-07-13 2002-08-21 Delphi Tech Inc Control method
FR2871197B1 (en) * 2004-06-04 2006-07-28 Renault V I Sa PUMP INJECTOR

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551398A (en) * 1994-05-13 1996-09-03 Caterpillar Inc. Electronically-controlled fluid injector system having pre-injection pressurizable fluid storage chamber and direct-operated check
US5738075A (en) * 1994-07-29 1998-04-14 Caterpillar Inc. Hydraulically-actuated fuel injector with direct control needle valve
EP0987431A2 (en) * 1998-09-18 2000-03-22 Lucas Industries Limited Fuel injector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551398A (en) * 1994-05-13 1996-09-03 Caterpillar Inc. Electronically-controlled fluid injector system having pre-injection pressurizable fluid storage chamber and direct-operated check
US5738075A (en) * 1994-07-29 1998-04-14 Caterpillar Inc. Hydraulically-actuated fuel injector with direct control needle valve
EP0987431A2 (en) * 1998-09-18 2000-03-22 Lucas Industries Limited Fuel injector

Also Published As

Publication number Publication date
GB9821929D0 (en) 1998-12-02
EP0992675A2 (en) 2000-04-12

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