JPS59218359A - Fuel-injection pump - Google Patents

Fuel-injection pump

Info

Publication number
JPS59218359A
JPS59218359A JP9199583A JP9199583A JPS59218359A JP S59218359 A JPS59218359 A JP S59218359A JP 9199583 A JP9199583 A JP 9199583A JP 9199583 A JP9199583 A JP 9199583A JP S59218359 A JPS59218359 A JP S59218359A
Authority
JP
Japan
Prior art keywords
injection
load
spring
cylinder
needle valve
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
JP9199583A
Other languages
Japanese (ja)
Inventor
Katsuo Yodogawa
Ichiro Hayashi
Original Assignee
Mitsubishi Heavy Ind 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 Mitsubishi Heavy Ind Ltd filed Critical Mitsubishi Heavy Ind Ltd
Priority to JP9199583A priority Critical patent/JPS59218359A/en
Publication of JPS59218359A publication Critical patent/JPS59218359A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift

Abstract

PURPOSE:To prevent both secondary injection at high load and abnormal injection at low load from occurring, by installing such a piston that is slidably fitted inside a hydraulic cylinder and simultaneously comes into contact with a spring keeper, in case of a fuel injection valve for an internal-combustion engine. CONSTITUTION:Enregizing force of a needle valve spring 4 is adjusted by an adjust screw 3 via a spring keeper 10. On the top of a body 1, there is provided with a cylinder 9 in which pistons 11 and 12 are slidably fitted. Fuel enters an oil sump 31 by way of an oil hole 30 and pushes a needle valve 6 upward against the energizing force of the needle valve spring 4, then injected into the cylinder from a nozzle hole 32. In time of low load, there is a clearance l, making valve opening pressure into being low but in time of high load, the clearance lcomes to zero by movements of these pistons 11 and 12 whereby the valve opening pressure goes up. Thus both of abnormal injection at low load and seconday injection at high speed are preventable.
JP9199583A 1983-05-25 1983-05-25 Fuel-injection pump Pending JPS59218359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9199583A JPS59218359A (en) 1983-05-25 1983-05-25 Fuel-injection pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9199583A JPS59218359A (en) 1983-05-25 1983-05-25 Fuel-injection pump

Publications (1)

Publication Number Publication Date
JPS59218359A true JPS59218359A (en) 1984-12-08

Family

ID=14042012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9199583A Pending JPS59218359A (en) 1983-05-25 1983-05-25 Fuel-injection pump

Country Status (1)

Country Link
JP (1) JPS59218359A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274260A1 (en) * 1987-01-09 1988-07-13 LUCAS INDUSTRIES public limited company Fuel injection nozzle
WO2004057181A1 (en) * 2002-12-20 2004-07-08 Volkswagen Mechatronic Gmbh & Co. Kg Pump-nozzle unit and method for regulating the opening pressure of the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431821A (en) * 1977-08-16 1979-03-08 Kiichi Chiyuusa Injection valve of interrupting injection
JPS5510607U (en) * 1978-07-05 1980-01-23

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431821A (en) * 1977-08-16 1979-03-08 Kiichi Chiyuusa Injection valve of interrupting injection
JPS5510607U (en) * 1978-07-05 1980-01-23

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274260A1 (en) * 1987-01-09 1988-07-13 LUCAS INDUSTRIES public limited company Fuel injection nozzle
WO2004057181A1 (en) * 2002-12-20 2004-07-08 Volkswagen Mechatronic Gmbh & Co. Kg Pump-nozzle unit and method for regulating the opening pressure of the same

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