JPS608434U

JPS608434U - Fuel injection pump for diesel engines

Info

Publication number: JPS608434U
Application number: JP10005983U
Authority: JP
Inventors: 敏久杉山
Original assignee: トヨタ自動車株式会社
Priority date: 1983-06-30
Filing date: 1983-06-30
Publication date: 1985-01-21

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図は燃料噴射ポンプの側面断面図、第２図は第１図
の■−■線に沿ってみた拡大断面図である。１０・・・・・・駆動軸、１８・・・・・・プランジャ
、２４・・・・・・カムプレート、２６・・・・・・カ
ム面、２８−−−−−−レバー、３０・・・・・・カム
ローラ、３２・・・・・・ローラリング、３４・・・・
・・タイマシリンダ、３６・・・・・・タイマピストン
、３８・・・・・・高圧室、４０・・・・・・低圧室、
８４・・・・・・ベローズ、８６・・・・・・制御計ン
ド。FIG. 1 is a side sectional view of the fuel injection pump, and FIG. 2 is an enlarged sectional view taken along the line ■-■ in FIG. 10... Drive shaft, 18... Plunger, 24... Cam plate, 26... Cam surface, 28... Lever, 30... ...Cam roller, 32...Roller ring, 34...
...Timer cylinder, 36...Timer piston, 38...High pressure chamber, 40...Low pressure chamber,
84... Bellows, 86... Control instrument.

Claims

[Scope of utility model registration request]

Equipped with an axially movable fuel injection plunger,
The end of the plunger is connected to a drive shaft via a coupling, and the plunger is rotated by the drive, and a cam plate is fixed to the end of the plunger, and a cam surface is provided around the end of the cam plate on the opposite side of the plunger. form,
A roller ring rotatable around the plunger axis is arranged adjacent to the end face of the cam plate, and a roller attached to the roller ring is brought into contact with the cam surface, so that when the cam plate rotates, the cam plate is moved along with the plunger in the axial direction. and further includes a timer piston that engages with the tip of a lever for controlling the rotation of the roller ring and is capable of reciprocating within the cylinder, forming a high pressure chamber and a low pressure chamber within the cylinder on both sides of the piston, respectively. The high pressure chamber is connected to the discharge side of the fuel pump, and a compression spring is arranged in the low pressure chamber to bias the timer piston toward the high pressure chamber. In a fuel injection pump for a diesel engine, the timer piston protrudes into the high pressure chamber and is configured to rotate the roller ring and advance the fuel injection timing by increasing the pressure and moving the timer piston toward the low pressure chamber. A fuel injection pump for a diesel engine, in which a rod that can be engaged with an end surface on a high pressure chamber side is connected to a bellows that expands and contracts in response to changes in atmospheric pressure, and the rod is made to protrude toward a timer piston as atmospheric pressure decreases.