JPS5928639U

JPS5928639U - Injection timing adjustment device for distributed fuel injection pump

Info

Publication number: JPS5928639U
Application number: JP12409782U
Authority: JP
Inventors: 恵一山田; 久中村
Original assignee: 株式会社ボッシュオートモーティブ　システム
Priority date: 1982-08-18
Filing date: 1982-08-18
Publication date: 1984-02-22

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 the drawing]

第１図は従来例を示す断面図、第２図、第３図はこの考
案の一実施例を示し、第２図は噴射時期調整装置付近の
分配型燃料噴射ポンプの構成を示す断面図、第３図は第
２図のＡＴＡ線断面図、第４図はこの考案の他の実施例
を示す断面図である。２３・・・タイマピストン、２５ａ、２５ｂ・・・カバ
ー、２６・・・タイマ本体、２７・・・シリンダ、２８
・・・圧油室、２９・・・低圧室、３０・・・サーボバ
ルブ、３１・・・スプール挿入Ｌ３２・・・スプール、
３４ａ。３４ｂ・・・通路、３７・・・サーボスプリング、３９
・・・当接部、４０・・・ストッパ部。FIG. 1 is a sectional view showing a conventional example, FIGS. 2 and 3 show an embodiment of this invention, and FIG. 2 is a sectional view showing the configuration of a distribution type fuel injection pump near the injection timing adjustment device. 3 is a sectional view taken along the line ATA in FIG. 2, and FIG. 4 is a sectional view showing another embodiment of this invention. 23...Timer piston, 25a, 25b...Cover, 26...Timer body, 27...Cylinder, 28
... Pressure oil chamber, 29 ... Low pressure chamber, 30 ... Servo valve, 31 ... Spool insertion L32 ... Spool,
34a. 34b... passage, 37... servo spring, 39
...Abutment part, 40...Stopper part.

Claims

[Claims for Utility Model Registration] 1. A servo valve is provided in a timer piston that defines a sealed pressure oil chamber and a low pressure chamber communicating with a drain in the cylinder, and the servo valve is formed in the axial direction of the timer piston. The spool has a spool inserted into the spool insertion hole, and this spool is displaced so that the pressure of fuel oil in the chamber corresponding to the engine speed and the pressing force of the servo spring arranged in the low pressure chamber are balanced. , the pressure oil chamber and the chamber are communicated through the spool insertion hole and the passage formed in the timer piston, or the pressure oil chamber and the low pressure chamber are communicated with each other, or the pressure oil chamber, the low pressure chamber, and the chamber are communicated with each other. In the injection timing adjustment device for a distribution type fuel injection pump, the timer piston is moved in accordance with the displacement of the spool of the servo valve by cutting off communication with the servo valve. At the same time, a stopper part is provided on the cover of the timer main body that constitutes one side of the cylinder opposite to the contact part of the spool, and the contact part of the spool comes into contact with the stopper part to reach the maximum advance angle. An injection timing adjustment device for a distribution type fuel injection pump, characterized in that the amount is regulated. 2. The injection timing adjustment device for a distribution type fuel injection pump according to claim 1, wherein the stopper portion is movable with respect to the cover.