DE3175234D1 - Device for fuel injection for an internal-combustion engine - Google Patents

Device for fuel injection for an internal-combustion engine

Info

Publication number
DE3175234D1
DE3175234D1 DE8181401902T DE3175234T DE3175234D1 DE 3175234 D1 DE3175234 D1 DE 3175234D1 DE 8181401902 T DE8181401902 T DE 8181401902T DE 3175234 T DE3175234 T DE 3175234T DE 3175234 D1 DE3175234 D1 DE 3175234D1
Authority
DE
Germany
Prior art keywords
chamber
pressure
control
injection
subjected
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.)
Expired
Application number
DE8181401902T
Other languages
German (de)
Inventor
Jean-Pierre Jourde
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Application granted granted Critical
Publication of DE3175234D1 publication Critical patent/DE3175234D1/en
Expired 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
    • F02M47/025—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
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/105—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive hydraulic drive

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

1. A fuel injection arrangement for an internal combustion engine comprising : an injection chamber (5) which is closed by a needle subjected to the force of a closure spring and the pressure in a discharge chamber (9) ; a control system (12) having two differential pistons which are fixed with respect to each other and comprising : - a delivery piston (13) delimiting a metering chamber (14) communicating with the injection chamber (5) and supplied with fuel at an intermediate feed pressure ; - a control piston (16) which is larger in section than the delivery piston (13), delimiting a control chamber (17) which can be subjected to a high control pressure by means of a three-way electrically operated valve system ; and - control means for discharging the discharge chamber (9) when the metered amount of fuel has been subjected to the injection pressure by the action of the high control pressure on the control piston (16) ; the dimensions of said discharge chamber (9) and the characteristics of the injector (1) being such that prior to injection the needle (2) remains in the closure position, when the injection chamber (5) is at the injection pressure obtaining in the metering chamber (14), the high control pressure being applied to the control piston (16) and the discharge chamber (9) being subjected to the control pressure ; the section (Sd ) of the discharge chamber (9) where the control pressure occurs and the closure spring (10) of the injector being such that the forces which result therefrom tending to hold the needle in the closure position are greater thant the force tending to open the needle and resulting from the action of the injection pressure in the metering chamber (14), the arrangement being characterised in that the control means for discharging the discharge chamber (9) comprise a sliding spool-type distributor (51) which is pilot-controlled by the high control pressure and by the pressure obtaining in the metering chamber (14) and that the spool of the distributor (51) is subjected on the one hand to the action of the high control pressure obtaining in a first pilot-control chamber (58) and on the other hand to the action of the pressure obtaining in a second pilot-control chamber (59), the second chamber communicating with a lower passage (66) opening into the metering chamber (14) and being capable of being closed by the delivery piston (13) and with an upper passage (67) communicating with the low pressure of the tank and being capable of being closed by the delivery piston (13), on of the said two passages being opened irrespective of the position of the delivery piston (13).
DE8181401902T 1981-01-15 1981-12-01 Device for fuel injection for an internal-combustion engine Expired DE3175234D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8100679A FR2497876B1 (en) 1981-01-15 1981-01-15 FUEL INJECTION DEVICE AND METHOD FOR AN INTERNAL COMBUSTION ENGINE

Publications (1)

Publication Number Publication Date
DE3175234D1 true DE3175234D1 (en) 1986-10-02

Family

ID=9254174

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181401902T Expired DE3175234D1 (en) 1981-01-15 1981-12-01 Device for fuel injection for an internal-combustion engine

Country Status (4)

Country Link
EP (1) EP0056916B1 (en)
AT (1) ATE21729T1 (en)
DE (1) DE3175234D1 (en)
FR (1) FR2497876B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541379B1 (en) * 1983-02-21 1987-06-12 Renault IMPROVEMENT IN ELECTROMAGNETICALLY CONTROLLED INJECTION SYSTEMS FOR A PRESSURE-TIME DIESEL ENGINE WHERE THE INJECTOR NEEDLE IS DRIVEN BY THE DISCHARGE THEN LOADING A CAPACITY
US6575137B2 (en) 1994-07-29 2003-06-10 Caterpillar Inc Piston and barrel assembly with stepped top and hydraulically-actuated fuel injector utilizing same
DE19910970A1 (en) * 1999-03-12 2000-09-28 Bosch Gmbh Robert Fuel injector
DE19939428A1 (en) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Method and device for performing a fuel injection

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2126777A1 (en) * 1971-05-28 1972-12-14 Bosch Gmbh Robert Pump nozzle for fuel injection for internal combustion engines
DE2126787C3 (en) * 1971-05-28 1980-01-24 Robert Bosch Gmbh, 7000 Stuttgart Fuel injection device for internal combustion engines
US3983855A (en) * 1973-07-12 1976-10-05 C.A.V. Limited Fuel injection system
DE2558789A1 (en) * 1975-12-24 1977-07-14 Bosch Gmbh Robert HIGH PRESSURE FUEL INJECTION DEVICE FOR DIESEL ENGINES
JPS53109021A (en) * 1977-03-07 1978-09-22 Nippon Denso Co Ltd Fuel injection device for internal combustion engine
DE2759187A1 (en) * 1977-12-31 1979-07-12 Bosch Gmbh Robert FUEL INJECTION SYSTEM WITH AT LEAST ONE FUEL INJECTION VALVE, ESPECIALLY FOR LARGE ENGINES
DE3000960A1 (en) * 1980-01-12 1981-09-10 Robert Bosch Gmbh, 7000 Stuttgart FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINES, ESPECIALLY FOR DIESEL ENGINES

Also Published As

Publication number Publication date
FR2497876B1 (en) 1986-02-07
EP0056916A1 (en) 1982-08-04
EP0056916B1 (en) 1986-08-27
FR2497876A1 (en) 1982-07-16
ATE21729T1 (en) 1986-09-15

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition