JPS5549571A - Method of controlling operation of electric-hydraulic type fuel injection system of diesel engine - Google Patents

Method of controlling operation of electric-hydraulic type fuel injection system of diesel engine

Info

Publication number
JPS5549571A
JPS5549571A JP12882779A JP12882779A JPS5549571A JP S5549571 A JPS5549571 A JP S5549571A JP 12882779 A JP12882779 A JP 12882779A JP 12882779 A JP12882779 A JP 12882779A JP S5549571 A JPS5549571 A JP S5549571A
Authority
JP
Japan
Prior art keywords
fuel injection
port
diesel engine
injection system
piston
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
JP12882779A
Other languages
Japanese (ja)
Inventor
Seikichi Kanai
Yoshio Omachi
Kazuhiko Otsubo
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP12882779A priority Critical patent/JPS5549571A/en
Publication of JPS5549571A publication Critical patent/JPS5549571A/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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification

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

PURPOSE: To improve performance of a diesel engine by varying characteristics of fuel injection electrically or hydraulically that could not been attained by the conventional cam mechanism and to provide an arrangement capable of giving various instructions to fuel injection system while the engine is in operation.
CONSTITUTION: When an injection pulse signal is given, at the time of fuel injection, from pulse generator 23 to servo valve 1 on the basis of instruction signal from computor 22, its spool 2 is moved to the left so that hydraulic oil fed under pressure from hydraulic pump 3 is passed through a third port 13 and a fourth port 14 and flows into upper hydraulic chamber 81 of pressure amplifying mechanism 8. Resultantly, piston 9 is moved downward and fuel in lower hydraulic chamber 83 is pressurized and injected into combustion chamber via oil passage 18 and fuel injection port 21. When the piston 9 comes to the bottom dead point, pressure in oil sump 16 is lowered and needle valve 19 is closed by spring 20. Thus, fuel injection is finished.
COPYRIGHT: (C)1980,JPO&Japio
JP12882779A 1979-10-08 1979-10-08 Method of controlling operation of electric-hydraulic type fuel injection system of diesel engine Pending JPS5549571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12882779A JPS5549571A (en) 1979-10-08 1979-10-08 Method of controlling operation of electric-hydraulic type fuel injection system of diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12882779A JPS5549571A (en) 1979-10-08 1979-10-08 Method of controlling operation of electric-hydraulic type fuel injection system of diesel engine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP46033302 Division

Publications (1)

Publication Number Publication Date
JPS5549571A true JPS5549571A (en) 1980-04-10

Family

ID=14994383

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12882779A Pending JPS5549571A (en) 1979-10-08 1979-10-08 Method of controlling operation of electric-hydraulic type fuel injection system of diesel engine

Country Status (1)

Country Link
JP (1) JPS5549571A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5726261A (en) * 1980-07-24 1982-02-12 Diesel Kiki Co Ltd Fuel injector of internal combustion engine
JPS5815757A (en) * 1981-07-20 1983-01-29 Diesel Kiki Co Ltd Fuel injection device
JPS58117352A (en) * 1981-12-30 1983-07-12 Isuzu Motors Ltd Injection quantity control device of pressure increasing plunger type fuel injection device
JPS59117883U (en) * 1983-01-31 1984-08-09 いすゞ自動車株式会社 Measuring device for pressure booster plunger type fuel injection system
JPS6036770A (en) * 1983-08-09 1985-02-25 Kawasaki Heavy Ind Ltd Fuel injection control device for internal-combustion engine
JPS6058866U (en) * 1983-09-30 1985-04-24 いすゞ自動車株式会社 Pressure booster plunger type fuel injection device
JPS60256548A (en) * 1984-05-31 1985-12-18 Isuzu Motors Ltd Booster plunger type fuel injector
CN110261088A (en) * 2019-06-29 2019-09-20 潍柴动力股份有限公司 A kind of method and system for the spring degree of aging detecting fuel injector

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6339789B2 (en) * 1980-07-24 1988-08-08 Diesel Kiki Co
JPS5726261A (en) * 1980-07-24 1982-02-12 Diesel Kiki Co Ltd Fuel injector of internal combustion engine
JPS5815757A (en) * 1981-07-20 1983-01-29 Diesel Kiki Co Ltd Fuel injection device
JPS58117352A (en) * 1981-12-30 1983-07-12 Isuzu Motors Ltd Injection quantity control device of pressure increasing plunger type fuel injection device
JPH0152583B2 (en) * 1981-12-30 1989-11-09 Isuzu Motors Ltd
JPH027256Y2 (en) * 1983-01-31 1990-02-21
JPS59117883U (en) * 1983-01-31 1984-08-09 いすゞ自動車株式会社 Measuring device for pressure booster plunger type fuel injection system
JPS6036770A (en) * 1983-08-09 1985-02-25 Kawasaki Heavy Ind Ltd Fuel injection control device for internal-combustion engine
JPS6058866U (en) * 1983-09-30 1985-04-24 いすゞ自動車株式会社 Pressure booster plunger type fuel injection device
JPH0424137Y2 (en) * 1983-09-30 1992-06-05
JPS60256548A (en) * 1984-05-31 1985-12-18 Isuzu Motors Ltd Booster plunger type fuel injector
JPH0438910B2 (en) * 1984-05-31 1992-06-25
CN110261088A (en) * 2019-06-29 2019-09-20 潍柴动力股份有限公司 A kind of method and system for the spring degree of aging detecting fuel injector
CN110261088B (en) * 2019-06-29 2021-03-16 潍柴动力股份有限公司 Method and system for detecting aging degree of spring of oil sprayer

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