JPS5713266A - Fuel injection device - Google Patents

Fuel injection device

Info

Publication number
JPS5713266A
JPS5713266A JP8745180A JP8745180A JPS5713266A JP S5713266 A JPS5713266 A JP S5713266A JP 8745180 A JP8745180 A JP 8745180A JP 8745180 A JP8745180 A JP 8745180A JP S5713266 A JPS5713266 A JP S5713266A
Authority
JP
Japan
Prior art keywords
pressure
nozzle
fuel injection
needle
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
JP8745180A
Other languages
Japanese (ja)
Other versions
JPS6237224B2 (en
Inventor
Kenji Nakayama
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 JP8745180A priority Critical patent/JPS5713266A/en
Publication of JPS5713266A publication Critical patent/JPS5713266A/en
Publication of JPS6237224B2 publication Critical patent/JPS6237224B2/ja
Granted 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
    • 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

Abstract

PURPOSE: To enhance fuel injection characteristics by a method wherein the displacement of a nozzle needle provided at a fuel injection nozzle of a Diesel engine is controlled by controlling the pressures supplied to two pressure oil chambers of a needle holder, and the control of the pressures is effected by two directional-control valves.
CONSTITUTION: Compressed fuel is supplied from a fuel compressor 10 to an oil sump 21 at the fuel injection nozzle 17 and is fully charged. In this condition, when a solenoid-operated type two- position three-port directional control valve 37 is switched over to the I-position side, the pressure in the first pressure oil chamber 29a of the nozzle holder 25 is rapidly reduced to zero, so that the nozzle needle 19 in the injection nozzle 17 is moved upward and a nozzle hole 20 is opened. In thisinstant, a directional control valve 38 of the same construction as that of the valve 37 is in II- position and the pressure in the second pressure oil chamber 29b is low. When the valve 38 is switched over from II-position to I-position, the pressure in the chamber 29b is rapidly increased tosurpass the force lifting up the needle 19 and to push a piston 27b downward, so that the needle 19 is seated on a valve seat to close the nozzle hole 20. Accordingly, the period of time from the pressure fall in the chamber 29a to the pressure rise in the chamber 29b constitutes the fuel injection time, resulting in an improvement of the fuel injection characteristics.
COPYRIGHT: (C)1982,JPO&Japio
JP8745180A 1980-06-27 1980-06-27 Fuel injection device Granted JPS5713266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8745180A JPS5713266A (en) 1980-06-27 1980-06-27 Fuel injection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8745180A JPS5713266A (en) 1980-06-27 1980-06-27 Fuel injection device

Publications (2)

Publication Number Publication Date
JPS5713266A true JPS5713266A (en) 1982-01-23
JPS6237224B2 JPS6237224B2 (en) 1987-08-11

Family

ID=13915212

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8745180A Granted JPS5713266A (en) 1980-06-27 1980-06-27 Fuel injection device

Country Status (1)

Country Link
JP (1) JPS5713266A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58124660U (en) * 1982-02-16 1983-08-24 三井造船株式会社 Diesel engine fuel injection valve
JPS6186564U (en) * 1984-11-13 1986-06-06
US4608253A (en) * 1982-05-31 1986-08-26 Mochida Pharmaceutical Co., Ltd. Process for removing immune complex in blood by use of the immobilized pepsin
JPS61147368U (en) * 1985-03-05 1986-09-11

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58124660U (en) * 1982-02-16 1983-08-24 三井造船株式会社 Diesel engine fuel injection valve
US4608253A (en) * 1982-05-31 1986-08-26 Mochida Pharmaceutical Co., Ltd. Process for removing immune complex in blood by use of the immobilized pepsin
JPS6186564U (en) * 1984-11-13 1986-06-06
JPS61147368U (en) * 1985-03-05 1986-09-11
JPH0513979Y2 (en) * 1985-03-05 1993-04-14

Also Published As

Publication number Publication date
JPS6237224B2 (en) 1987-08-11

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