JPS59163171U

JPS59163171U - Structure of injection part in electromagnetic fuel injector

Info

Publication number: JPS59163171U
Application number: JP5704183U
Authority: JP
Inventors: 牧村　敏朗; 仁司竹内
Original assignee: 愛三工業株式会社
Priority date: 1983-04-16
Filing date: 1983-04-16
Publication date: 1984-11-01

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図はこの考案の第１実施例を含む電磁燃料噴射器の
縦断正面図を示し、第２図は第１実施例の縦断正面図を
示す。第３図及び第４図はそれぞれ第２実施例、第３実
施例の縦断正面図を示す。第５図は第１実施例における燃料流を示し、第６図は噴
射角と円錐角と′燃料噴射孔の長さ／直径との関係を示
す図である。第７図は従来の電磁燃料　　　２噴射器の
噴射部の縦断正面図を示し、第８図は第７図の噴射部に
おける燃料流を示した図である。１・・・燃料噴射孔、２・・・弁座、５・・・バルブハ
ウジング、７・・・開閉弁、７ｂ・・・弁子、１３・・
・圧縮スプリング（スプリング）。FIG. 1 shows a longitudinal sectional front view of an electromagnetic fuel injector including a first embodiment of this invention, and FIG. 2 shows a longitudinal sectional front view of the first embodiment. FIGS. 3 and 4 show longitudinal sectional front views of the second embodiment and the third embodiment, respectively. FIG. 5 shows the fuel flow in the first embodiment, and FIG. 6 is a diagram showing the relationship between the injection angle, the cone angle, and the length/diameter of the fuel injection hole. FIG. 7 shows a longitudinal sectional front view of the injection section of a conventional electromagnetic fuel injector, and FIG. 8 is a diagram showing the fuel flow in the injection section of FIG. DESCRIPTION OF SYMBOLS 1...Fuel injection hole, 2...Valve seat, 5...Valve housing, 7...Opening/closing valve, 7b...Valve element, 13...
- Compression spring (spring).

Claims

[Scope of utility model registration request]

A valve seat with a circular cross section and a tapered valve seat surface is formed at the front part of the cylindrical valve housing, a fuel injection hole is provided at the front end of the valve seat, and a spherical valve seat is provided at the front end of the valve housing. A cylindrical on-off valve that has a valve element and can reciprocate in the axial direction of the valve housing is inserted, and this on-off valve intermittently moves back and forth due to the action of an electromagnetic force and a spring to open the valve element. In an electromagnetic fuel injector that opens and closes by detaching from and contacting the seat surface and intermittently injects pressurized fuel from the fuel injection hole, the valve seat surface on the downstream side of the respective contact points between the valve seat surface and the valve element. At least one of the inclination angle with respect to the central axis of the fuel injection hole and the shape of the valve element is such that the fuel flow generated by opening the on-off valve is at a larger inclination angle with respect to the central axis downstream of the contact part than in the contact part. The structure of the injection part is characterized by being set to have the following characteristics.