JPS60187365U

JPS60187365U - Throttle type fuel injection nozzle

Info

Publication number: JPS60187365U
Application number: JP7552584U
Authority: JP
Inventors: 徹石橋
Original assignee: 株式会社ボッシュオートモーティブ　システム
Priority date: 1984-05-23
Filing date: 1984-05-23
Publication date: 1985-12-12

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]

図面は本考案の一実施例を示し、第１図は本考案のス、
ロットル型燃料噴射ノズルの縦断面図、第２図は同スプ
ール弁の作動位置９異なる要部縦断面図、第３図は本考
案のスロットル型燃料噴射ノズルを、燃料噴射ポンプ系
に組み込んだ状態の構成図である。１・・・燃料噴射ノズル、２・・・ノズルホルダ、３・
・・ノズルボディ、３ｂ・・・噴孔、６・・・プランジ
ャ嵌装孔、６ａ・・・背圧室、１３・・・セントラルプ
ランジャ、１７・・・ノズルニードル、１７ｅ・・・ピ
ン、１８　　　　゛・・・可動ばね座、１９・・・ノズ
ルばね、２２・・・スプール弁（切換手段）、２９・・
・燃料流入口、３８・・・燃料噴射ポンプ、Ｌ２・・・
初期噴射開弁リフト用間　　１隙。第−１図− 第２図The drawings show an embodiment of the present invention, and FIG.
A vertical cross-sectional view of a throttle-type fuel injection nozzle, FIG. 2 is a vertical cross-section of the main part of the same spool valve at nine different operating positions, and FIG. 3 is a state in which the throttle-type fuel injection nozzle of the present invention is assembled into a fuel injection pump system. FIG. 1... Fuel injection nozzle, 2... Nozzle holder, 3...
... Nozzle body, 3b... Nozzle hole, 6... Plunger fitting hole, 6a... Back pressure chamber, 13... Central plunger, 17... Nozzle needle, 17e... Pin, 18゛... Movable spring seat, 19... Nozzle spring, 22... Spool valve (switching means), 29...
・Fuel inlet, 38...Fuel injection pump, L2...
1 gap for initial injection valve opening lift. Figure 1- Figure 2

Claims

[Scope of utility model registration request]

a nozzle holder having a fuel inlet connected to a fuel injection pump; a nozzle body supported by the nozzle holder and having a nozzle hole communicating with the fuel inlet at a lower end; and liftably installed in the nozzle body. a nozzle needle which is biased by a nozzle spring to a valve closing position that closes the nozzle hole and has a pin at its lower end that fits into the nozzle hole; and a lift integrally provided at the upper end of the nozzle needle. a movable spring seat that is mounted to support the lower end of the nozzle spring; and an upper end surface of the movable spring seat that is fit into the fitting hole in the nozzle holder so as to be able to be lifted freely and whose lower end surface is in the valve closed position; A central plunger facing each other with an initial injection opening lift gap therebetween, and a fuel provided in a fitting hole on the upper end side of the central plunger to resist the lift of the plunger accompanying the lift of the nozzle needle. It is equipped with a back pressure chamber into which hydraulic pressure is introduced, and a switching means that selectively connects the back pressure chamber to a fuel oil pressure system line and an atmospheric pressure line, and when the engine is at high speed and under high load. The nozzle needle is configured to be forcibly held at an initial injection valve open position via the central plunger by switching the switching means and introducing fuel oil pressure into the back pressure chamber. Throttle type fuel injection nozzle.