JPS5968143U

JPS5968143U - Diesel engine fuel injection system

Info

Publication number: JPS5968143U
Application number: JP16530182U
Authority: JP
Inventors: 富田　幸裕; 直樹柳沢
Original assignee: いすゞ自動車株式会社
Priority date: 1982-10-30
Filing date: 1982-10-30
Publication date: 1984-05-09

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来例及び本考案の実施例におけるディーゼル
機関の進角量と機関回転数との関係を示〜す線図、第２
図は従来のＶＥ型の燃料噴射ポンプの概略側面図、第３
図は第２図のオーバフローバルブの要部拡大の側断面図
、第４図は本考案の実施例におけるディーゼル機関の燃
料噴射装置の要部側断面図、第５図は第４図の機関始動
時の状態を示す要部側断面図、第６図は燃料噴射ポンプ
のポンプ室内圧と機関回転数との関係を示す線図、第７
図は第４図のソレノイドへの電流制御装置の作動を示す
タイムチャート、第８図は本考案の他の実施例における
ソレノイドの作動を示すタイムチャートである。１・・・燃料噴射ポンプ、２・・・リターン穴、３・・
・芽−パフローバルブ、４・・・始動リターン穴、６・
・・プランジャ、７・・・スプリング、８・・・ソレノ
イド、Ｆ・・・燃料。キースイッチ　′ｔ７↑　　　［−−−−Ｌ−−」□□
−上−− Ｉ　　Ｔ２Fig. 1 is a diagram showing the relationship between advance angle amount and engine speed of a diesel engine in a conventional example and an embodiment of the present invention;
The figure is a schematic side view of a conventional VE type fuel injection pump.
The figure is an enlarged side sectional view of the main part of the overflow valve shown in Fig. 2, Fig. 4 is a side sectional view of the main part of the diesel engine fuel injection system according to the embodiment of the present invention, and Fig. 5 is the engine starting shown in Fig. 4. Fig. 6 is a diagram showing the relationship between the pump chamber pressure and engine speed of the fuel injection pump;
This figure is a time chart showing the operation of the current control device for the solenoid in FIG. 4, and FIG. 8 is a time chart showing the operation of the solenoid in another embodiment of the present invention. 1...Fuel injection pump, 2...Return hole, 3...
・Bud-puff flow valve, 4...Start return hole, 6.
... Plunger, 7... Spring, 8... Solenoid, F... Fuel. Key switch 't7↑ [----L--]□□
-Top-- I T2

Claims

[Scope of utility model registration request]

In a diesel engine equipped with a fuel injection pump with an overflow valve having a fuel return hole, the overflow valve is provided with a starting return hole having a smaller diameter than the return hole in addition to the return hole, and
A fuel injection device for a diesel engine, comprising a plunger that closes the return hole only for a predetermined period when starting the diesel engine and opens the start return hole.