JPH02126073U

JPH02126073U -

Info

Publication number: JPH02126073U
Application number: JP3327189U
Authority: JP
Priority date: 1989-03-27
Filing date: 1989-03-27
Publication date: 1990-10-17

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例による燃料噴射弁３
０の縦断面図、第２図は同、要部拡大縦断面図、
第３図ないし第７図は同、噴射用通孔３２の加工
工程を示す説明図、第８図は従来の燃料噴射弁１
の縦断面図、第９図は同、要部拡大縦断面図、第
１０図は同、噴射用通孔１８を形成するための放
電加工の説明図、第１１図は同、他の加工方法の
説明図である。１……燃料噴射弁、２……コネクタパイプ、３
……バルブハウジング、４……ノズルボデイ、５
……プロテクタ、６……フイルター、７……電磁
コイル、８……コア、９……アジヤストパイプ、
１０……ノズルスプリング、１１……ターミナル
、１２……ガイド孔、１３……ニードル弁、１４
……スペーサ、１５……噴口、１６……燃料溜り
室、１７……噴口マスキング部材、１８……噴射
用通孔、１９……開口部、２０……放電加工電極
、２１……ダイ、２２……ポンチ、２３……孔部
、３０……燃料噴射弁、３１……噴口マスキング
部材、３１Ａ……平板状の材料、３２……噴射用
通孔、３２Ａ……噴射用通孔３２に相当する通孔
、３３……下型、３４……ポンチ、３５……曲面
状の穴、Ｄ……噴射用通孔３２の外側の直径、ｄ
……噴射用通孔３２の内側の直径、Ｌ……リフト
量。 FIG. 1 shows a fuel injection valve 3 according to an embodiment of the present invention.
0 longitudinal cross-sectional view, Figure 2 is an enlarged longitudinal cross-sectional view of the main parts,
3 to 7 are explanatory diagrams showing the machining process of the injection hole 32, and FIG. 8 is a conventional fuel injection valve 1.
9 is an enlarged vertical sectional view of the main part, FIG. 10 is an explanatory diagram of electrical discharge machining for forming the injection hole 18, and FIG. 11 is the same, another machining method. FIG. 1...Fuel injection valve, 2...Connector pipe, 3
... Valve housing, 4 ... Nozzle body, 5
...Protector, 6...Filter, 7...Electromagnetic coil, 8...Core, 9...Adjustment pipe,
10... Nozzle spring, 11... Terminal, 12... Guide hole, 13... Needle valve, 14
... Spacer, 15 ... Nozzle, 16 ... Fuel reservoir chamber, 17 ... Nozzle masking member, 18 ... Injection hole, 19 ... Opening, 20 ... Electric discharge machining electrode, 21 ... Die, 22 ... Punch, 23 ... Hole portion, 30 ... Fuel injection valve, 31 ... Nozzle masking member, 31A ... Flat material, 32 ... Injection hole, 32A ... Equivalent to injection hole 32 through hole, 33...lower mold, 34...punch, 35...curved hole, D...outer diameter of injection through hole 32, d
...Inner diameter of the injection hole 32, L...Lift amount.

Claims

[Claims for Utility Model Registration] A valve housing; a nozzle body attached to the valve housing and having a nozzle; a needle valve for opening and closing the nozzle; attached to the nozzle body so as to cover the nozzle and communicating with the nozzle. A fuel injection valve having a nozzle masking member having a plurality of injection holes formed therein, wherein the nozzle masking member is formed into a curved surface, and the injection holes are formed in the curved portion. Characteristic fuel injection valve.