JPS59130040U

JPS59130040U - Diesel engine fuel injection system

Info

Publication number: JPS59130040U
Application number: JP2324983U
Authority: JP
Inventors: 博三宅
Original assignee: ダイハツ工業株式会社
Priority date: 1983-02-19
Filing date: 1983-02-19
Publication date: 1984-08-31
Also published as: JPH0144760Y2

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図は従来例を示す断面図、第２図は同従来例の原理
説明図、第３図は本考案の要部を示す断面図、第４図は
噴射時期に関する制御特性を説明するための図である。２・・・油圧室、１２・・・噴射時期調整機構、３３・
・・　　　　−ガバナシャフト、３４・・・ガバナスリ
ーブ、４１・・・油圧制御機構、４２・・・燃料リター
ン通路、４４・・・ポート、５１・・・制御解除機構、
５２・・・弁体、５３・・・スプリング、５４・・・油
圧導入室。Fig. 1 is a sectional view showing the conventional example, Fig. 2 is a diagram explaining the principle of the conventional example, Fig. 3 is a sectional view showing the main part of the present invention, and Fig. 4 is for explaining the control characteristics regarding injection timing. This is a diagram. 2... Hydraulic chamber, 12... Injection timing adjustment mechanism, 33.
... - Governor shaft, 34... Governor sleeve, 41... Hydraulic control mechanism, 42... Fuel return passage, 44... Port, 51... Control release mechanism,
52...Valve body, 53...Spring, 54...Hydraulic pressure introduction chamber.

Claims

[Scope of utility model registration request]

An injection timing adjustment mechanism that adjusts the fuel injection timing using fuel oil pressure corresponding to the engine rotational speed, and a fuel return passage that communicates with the hydraulic chamber through the port of the governor sleeve are provided at the axial center of the governor shaft. a hydraulic control mechanism that delays fuel injection timing by releasing a portion of the fuel in the hydraulic chamber to the fuel return passage to lower the fuel oil pressure in a low load region where the fuel return indicator communicates; , a fuel injection device comprising a control release mechanism that disables the oil pressure lowering function of the oil pressure control mechanism in a high speed region where the engine speed exceeds a predetermined value, the control release mechanism being disposed within the governor shaft. a valve body that is housed so as to be movable in an axial direction and opens and closes the fuel return passage by its forward and backward movements; a spring that biases the valve body in an opening direction; and a spring that applies the fuel oil pressure to one end of the valve body. 1. A fuel injection device for a diesel engine, comprising a hydraulic pressure introduction chamber for biasing the valve body in a closing direction.