JPS63105773U

JPS63105773U -

Info

Publication number: JPS63105773U
Application number: JP20367086U
Authority: JP
Priority date: 1986-12-26
Filing date: 1986-12-26
Publication date: 1988-07-08

Description

[Brief explanation of the drawing]

第１図及び第２図は本考案に用いる沿面放電型
プラグの一実施例を示したもので、第１図はその
プラグの要部断面図、第２図は第１図の発火部の
断面図、第３図は本考案に用いる他の実施例の沿
面放電型プラグの発火部の断面図、第４図は本考
案の点火装置の回路図である。１は主体金具、１ａは内腔、１ｂは先端段座面
、１ｄは先端内壁、２は絶縁体、２ｅは発火部端
面、２ｆは凹み、２ｇは平坦面、２ｈは底部、３
は中心電極、３ａは先端部、４は沿面放電間隙、
５は気中間隙、１０は沿面放電型プラグ、５０は
点火回路、５８は多重ゲート信号回路。 Figures 1 and 2 show an embodiment of a creeping discharge type plug used in the present invention. Figure 1 is a cross-sectional view of the main part of the plug, and Figure 2 is a cross-sectional view of the firing part of Figure 1. FIG. 3 is a sectional view of the ignition part of a creeping discharge type plug according to another embodiment of the present invention, and FIG. 4 is a circuit diagram of the ignition device of the present invention. 1 is the metal shell, 1a is the inner cavity, 1b is the tip seat surface, 1d is the tip inner wall, 2 is the insulator, 2e is the firing part end surface, 2f is the recess, 2g is the flat surface, 2h is the bottom, 3
is the center electrode, 3a is the tip, 4 is the creeping discharge gap,
5 is an air gap, 10 is a creeping discharge type plug, 50 is an ignition circuit, and 58 is a multiple gate signal circuit.

Claims

[Scope of utility model registration request]

A metal shell equipped with an engine mounting screw, an insulator housed and fixed so as to come into contact with the top step seat surface of the inner cavity of the metal shell, and a hemispherical or mortar-shaped recess provided on the end face of the firing part of the insulator. A creeping discharge type comprising: a center electrode having a small-diameter tip disposed at the bottom thereof, and a creeping discharge gap formed between the center electrode tip and the inner wall of the tip of the metal shell through the recess; A plug is combined with a multiple spark power source that causes the creeping discharge plug to generate two or more spark discharges at the same timing, and the multiple spark power source is controlled within the range of engine operating conditions where the amount of carbon generation or adhesion is high. Features an ignition device.