JPS6139880U

JPS6139880U - Spark plug for internal combustion engine

Info

Publication number: JPS6139880U
Application number: JP12462584U
Authority: JP
Inventors: 隆行出村; 鋼三高村
Original assignee: トヨタ自動車株式会社; 株式会社デンソー
Priority date: 1984-08-15
Filing date: 1984-08-15
Publication date: 1986-03-13

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図は本考案の第１実施例に係る内燃機関用点火プラ
グを示す要部断面図、′第２図は第１図に示す点火プラ
グにおいて中心熱価を変える場合を説明する断面図であ
って、Ａは中心熱価を低くずる場合を示し、Ｂは中・ｑ
・熱価を高くする場合を示し、第３図は中心熱価とサイ
ドパッキン長さ、１の関係を示す図、第４図はサイドパ
ッキンの形状を示す図、第５図はサイドパッキンを組付
けたときの状態を示す図、第６図は、本考案の第２実施
例を示す要部断面図、第７図は、本考案の第３実施例や
示す要部断面図、第８図は、従来の内燃機関用点火プラ
グの一例を示す要部断面図、第９図は、第６図に示す点
火プラグの改良例を示す要部断面図である。１・・・ハウジング、１ｂ・・・ハウジング胴部、−２
・・・中心電極、３・・・接地電極、４・・・碍子、７
・・・ガスポケット。Fig. 1 is a cross-sectional view of a main part showing a spark plug for an internal combustion engine according to a first embodiment of the present invention, and Fig. 2 is a cross-sectional view illustrating a case where the center heat value is changed in the spark plug shown in Fig. 1. Therefore, A indicates the case where the center heat value is lowered, and B indicates the case where the center heat value is lowered.
・This shows the case of increasing the heat value. Figure 3 shows the relationship between the center heat value and the side packing length, 1. Figure 4 shows the shape of the side packing. Figure 5 shows how the side packing is assembled. FIG. 6 is a cross-sectional view of the main parts of the second embodiment of the present invention, FIG. 7 is a cross-sectional view of the main parts of the third embodiment of the present invention, and FIG. 8 is a diagram showing the state when attached. 9 is a cross-sectional view of a main part showing an example of a conventional spark plug for an internal combustion engine, and FIG. 9 is a cross-sectional view of a main part showing an improved example of the spark plug shown in FIG. 1...Housing, 1b...Housing body, -2
...Center electrode, 3...Ground electrode, 4...Insulator, 7
...Gas pocket.

Claims

[Scope of utility model registration request]

(1) An insulator provided with a center electrode is fitted into a housing with a part of it protruding, a gas pocket is formed between the front part of the insulator and the inner surface of the housing, and a gas pocket is placed at a rear position following this gas pocket. A packing interposed part is provided, a center heat value adjustment area is provided in which the sum of the length of the gas pocket and the length of the packing interposed part is constant, and the length of the packing interposed part with respect to the length of the center heat value adjustment area is provided. A spark plug for an internal combustion engine configured to adjust the center heat value by changing the ratio of heat.

(2) The spark plug for an internal combustion engine according to claim 1, wherein the packing intervening portion is formed of a plane parallel to the axis.

(3) The spark plug for an internal combustion engine according to claim 1, wherein the packing interposed portion is formed of a curved surface.

(4) The spark plug for an internal combustion engine according to claim 1, wherein the intervening portion has a tapered surface.