JPS59100937U

JPS59100937U - Fuel injection pump timer mechanism

Info

Publication number: JPS59100937U
Application number: JP19701082U
Authority: JP
Inventors: 江藤　幸寛; 兼先　伸和
Original assignee: 日産自動車株式会社
Priority date: 1982-12-24
Filing date: 1982-12-24
Publication date: 1984-07-07

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来における燃料噴射ポンプのタイマ機構を示
す断面図、第２図はこの考案に係るタイマ機構の要部を
示す断面図、第３図はこの考案の異なる実施例を示す断
面図である。１・・・ポンプハウジング、３・・・タイマシリンダ、
４・・・タイマピストン、８・・・油圧室、１０・・・
低圧室、１１・・・タイマピストン付勢スプリング、１
２・・・タイマ制御弁、１３・・・圧力逃がし通路、２
１・・・ワックスケース、２２・・・スプリングシート
、２３・・・ピ　　　　　“ストン、２４・・・サーモ
ワックス、′３１・・・フェイスカム、３２・・・ステ
ッピングモータ。Fig. 1 is a sectional view showing a conventional timer mechanism of a fuel injection pump, Fig. 2 is a sectional view showing main parts of the timer mechanism according to this invention, and Fig. 3 is a sectional view showing a different embodiment of this invention. be. 1... Pump housing, 3... Timer cylinder,
4...Timer piston, 8...Hydraulic chamber, 10...
Low pressure chamber, 11... timer piston biasing spring, 1
2...Timer control valve, 13...Pressure relief passage, 2
1... Wax case, 22... Spring seat, 23... Piston, 24... Thermo wax, '31... Face cam, 32... Stepping motor.

Claims

[Scope of utility model registration request]

One end of the timer cylinder is defined by a timer cylinder integrally formed with the pump housing, a timer piston slidably disposed within the timer cylinder and determining the fuel injection timing, and the timer screw. In addition, a hydraulic chamber into which a pump chamber pressure corresponding to the rotational speed of the drive shaft is introduced, and a timer piston biasing spring disposed at the other end of the timer cylinder to press the timer piston toward the hydraulic chamber. , a pressure relief passage communicating the hydraulic chamber with the low pressure side of the pump, and a timer control valve installed in the pressure relief passage to variably control the pressure in the hydraulic chamber and supporting the base end of the timer piston biasing spring. and a spring set pressure variable mechanism that adjusts the set pressure of the spring by movement of the spring set pressure variable mechanism.