JPS57206770A - Fuel injection valve of internal combustion engine - Google Patents

Fuel injection valve of internal combustion engine

Info

Publication number
JPS57206770A
JPS57206770A JP9067781A JP9067781A JPS57206770A JP S57206770 A JPS57206770 A JP S57206770A JP 9067781 A JP9067781 A JP 9067781A JP 9067781 A JP9067781 A JP 9067781A JP S57206770 A JPS57206770 A JP S57206770A
Authority
JP
Japan
Prior art keywords
pressure
valve
injection valve
schnar
sound
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
JP9067781A
Other languages
Japanese (ja)
Inventor
Hiroichi Ikeda
Susumu Nagai
Kazusuke Mizushima
Shinsaku Hirano
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.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen Corp
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 Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP9067781A priority Critical patent/JPS57206770A/en
Publication of JPS57206770A publication Critical patent/JPS57206770A/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
    • F02M61/06—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 the valves being furnished at seated ends with pintle or plug shaped extensions
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for

Abstract

PURPOSE:To prolong operation life of an injection pump after an engine is mounted by determining a ratio of pressures for lifting a needle valve, one is required when the injection valve is opened and the other just after that, that is, a characteristic value of Schnar sound, within a specific range when the injection pump is tested with a hand pump. CONSTITUTION:Examination of theory and experimental work on a generative function of Schnar sound of an injection valve on the basis of a hand pump test recommends that a characteristic value SV in the design specifications of the valve should be no less than 1.05 from the view point of a relation between a life of the Schnar sound and the characteristic value. As a pressure for opening the injection valve of a Diesel engine is set as high as two or three times of the maximum pressure in a cylinder, a pressure for closing the valve below one-third of the pressure for opening it, makes the valve unavailable for practical use. By reversely calculating the sV under the condition the pressure for closing should be more than one-third of the pressure for opening, the SV must be fixed below 2.0. That is, the SV ranging 1.05 and 2.00 is ideal for long duration of the generated Schnar sound to prolong a service life of the injection valve.
JP9067781A 1981-06-11 1981-06-11 Fuel injection valve of internal combustion engine Pending JPS57206770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9067781A JPS57206770A (en) 1981-06-11 1981-06-11 Fuel injection valve of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9067781A JPS57206770A (en) 1981-06-11 1981-06-11 Fuel injection valve of internal combustion engine

Publications (1)

Publication Number Publication Date
JPS57206770A true JPS57206770A (en) 1982-12-18

Family

ID=14005164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9067781A Pending JPS57206770A (en) 1981-06-11 1981-06-11 Fuel injection valve of internal combustion engine

Country Status (1)

Country Link
JP (1) JPS57206770A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639568A (en) * 1984-07-13 1987-01-27 Ex-Cell-O Corporation Apparatus and method for finishing fuel injector spray tips using EDM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639568A (en) * 1984-07-13 1987-01-27 Ex-Cell-O Corporation Apparatus and method for finishing fuel injector spray tips using EDM

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