JPH0321529U

JPH0321529U -

Info

Publication number: JPH0321529U
Application number: JP8217989U
Authority: JP
Priority date: 1989-07-14
Filing date: 1989-07-14
Publication date: 1991-03-04

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す断面図、第２
図は本考案における第２スプリングアツセンブリ
の断面図、第３図ａ〜ｄは本考案タイマの作動を
段階的に示す説明図、第４図は本考案タイマの進
角特性を例示する線図である。１…ポンプハウジング、２…ポンプ室、３…ロ
ーラホルダ、５…タイマピストン、８…高圧室、
９…第１スプリング、１０…第２スプリング、１
１…低圧側カバー、１２…筒状スプリングガイド
、１３…セツトボルト、１４…可動スプリングシ
ート、１６…調整シム、１２０…シート部、１２
１…内向きフランジ、１２３…スプリングシート
、１３０…頭部、１４０…ねじ筒部、Ａ…第２ス
プリングアツセンブ。 Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view of the second spring assembly of the present invention, Figures 3 a to d are explanatory diagrams showing the operation of the timer of the present invention step by step, and Figure 4 is a diagram illustrating the advance angle characteristics of the timer of the present invention. It is. 1...Pump housing, 2...Pump chamber, 3...Roller holder, 5...Timer piston, 8...High pressure chamber,
9...First spring, 10...Second spring, 1
DESCRIPTION OF SYMBOLS 1... Low pressure side cover, 12... Cylindrical spring guide, 13... Set bolt, 14... Movable spring seat, 16... Adjustment shim, 120... Seat part, 12
DESCRIPTION OF SYMBOLS 1...Inward flange, 123...Spring seat, 130...Head, 140...Threaded cylinder part, A...Second spring assembly.

Claims

[Claim for Utility Model Registration] A fuel injection pump that is installed in a fuel injection pump that pumps fuel oil to each cylinder using a rotating and reciprocating plunger, and is displaced by receiving fuel oil that is pressurized by a feed pump and supplied into the pump chamber. a timer piston, and two springs with different spring constants disposed on opposing sides, and the springs sequentially act on the timer piston under different set loads, so that the timer piston is displaced in stages. A timer configured, the timer having a first spring on the low pressure side of the timer piston, a low pressure side cover and a second spring assembly independent of the low pressure side cover, the second spring assembly having an outer side at one end. A cylindrical spring guide having a flange-shaped seat portion, an inward flange at the other end, a head that abuts the inward flange of the cylindrical spring guide at one end, and a movable spring seat screwed onto the other end. a second set bolt elastically mounted between the movable spring seat and the outwardly facing flange-shaped seat portion;
a spring, the first spring being loosely inserted into the inner cavity of the cylindrical spring guide so as to be supported by a seat provided in the middle of the cylindrical spring guide. timer.