JPS57191450A - Fuel injection valve - Google Patents

Fuel injection valve

Info

Publication number
JPS57191450A
JPS57191450A JP7524781A JP7524781A JPS57191450A JP S57191450 A JPS57191450 A JP S57191450A JP 7524781 A JP7524781 A JP 7524781A JP 7524781 A JP7524781 A JP 7524781A JP S57191450 A JPS57191450 A JP S57191450A
Authority
JP
Japan
Prior art keywords
needle valve
fuel
fuel injection
pressure
oil
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.)
Pending
Application number
JP7524781A
Other languages
Japanese (ja)
Inventor
Hisashi Nakamura
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.)
Bosch Corp
Original Assignee
Diesel Kiki Co 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 Diesel Kiki Co Ltd filed Critical Diesel Kiki Co Ltd
Priority to JP7524781A priority Critical patent/JPS57191450A/en
Publication of JPS57191450A publication Critical patent/JPS57191450A/en
Pending 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
    • F02M61/04—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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type

Abstract

PURPOSE:To contrive to accelerate a downward movement of a needle valve and prevent a fuel injection at a low pressure from occurring in a final period of the fuel injection, by a method wherein the upward movement of the needle valve can be carried out by superposing a jet oil pressure on the force of a spring which forces the needle valve in the direction for closing. CONSTITUTION:The fuel injection valve is opened by lifting the needle valve 4 against the spring 7 by the pressure of the fuel which is supplied through an oil passage 10 to be contained in an oil reservoir 6f provided in a nozzle body 1, and the fuel is jetted through a nozzle 6g at a high pressure. In the nozzle body 1, a space part 6d is provided in the periphery of a small-diameter part 4d formed between sliding parts of the valve 4. A sleeve piston 8 having a pressure- receiving surface 8a provided at its lower end to be supplied with the fuel simultaneously with the feeding of the fuel to the needle valve 4 throug a branch passage 10c is contained in the space part 6d. The piston 8 is provided with an oil-passing hole 8b for accelerating the downward movement of the needle valve 4 by communicating the space part 8c to the oil reservoir 6f when the piston 8 is moved downwards after moving upwards.
JP7524781A 1981-05-19 1981-05-19 Fuel injection valve Pending JPS57191450A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7524781A JPS57191450A (en) 1981-05-19 1981-05-19 Fuel injection valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7524781A JPS57191450A (en) 1981-05-19 1981-05-19 Fuel injection valve

Publications (1)

Publication Number Publication Date
JPS57191450A true JPS57191450A (en) 1982-11-25

Family

ID=13570699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7524781A Pending JPS57191450A (en) 1981-05-19 1981-05-19 Fuel injection valve

Country Status (1)

Country Link
JP (1) JPS57191450A (en)

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