JPS59107492U

JPS59107492U - Spark plug with built-in pressure pick-up

Info

Publication number: JPS59107492U
Application number: JP75183U
Authority: JP
Inventors: 五十嵐一博; 松村修造
Original assignee: 日本特殊陶業株式会社
Priority date: 1983-01-10
Filing date: 1983-01-10
Publication date: 1984-07-19

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図は従来の圧力ビックアップ内蔵スパークプラグの
一例を示す縦断面図、第２図は本考案の圧力ビックアッ
プ内蔵スパークプラグの一例を示す縦断面図、第３図Ａ
、　Ｂはそれぞれ本考案で用いられるコネクタピンの縦
断面図及び横断面図、第４図Ａ、　Ｂは高圧リード線側
の接続端子部の構造例を示す縦断面図である。１・・・セラミック製絶縁体、２・・・中心電極、３・
・・取付金具、３ａ・・・前部取付金具、３ｂ・・・後
部取付−金具、４・・・外側電極、５・・・端子金具、
６・・・感圧素子、７・・・絶縁体の大径部、７′・・
・向後肩部、Ｌ・・・突出長、１′・・・軸方向の長さ
を短縮したセラミック絶縁体、Ｌ′・・・突出長、１０
・・・高圧リード線、１０′・・・導線、１１・・・貫
通孔、１２・・・中心電極、′１３・・・コネクタピン
、１４・・・鳩目金具、１５・・・螺旋溝、１６・・・
コイルスプリング式金属スリーブ、１６′・・・自由端
、１７・・・絶縁チューブ、１８・・・金属スリーブ。Fig. 1 is a vertical sectional view showing an example of a conventional spark plug with a built-in pressure kick-up, Fig. 2 is a longitudinal sectional view showing an example of a spark plug with a built-in pressure bump of the present invention, and Fig. 3A.
, B are a vertical cross-sectional view and a cross-sectional view, respectively, of a connector pin used in the present invention, and FIGS. 4A and 4B are vertical cross-sectional views showing an example of the structure of a connecting terminal portion on the high voltage lead wire side. 1... Ceramic insulator, 2... Center electrode, 3...
... Mounting bracket, 3a... Front mounting bracket, 3b... Rear mounting bracket, 4... Outer electrode, 5... Terminal fitting,
6...Pressure sensitive element, 7...Large diameter part of insulator, 7'...
・Backward shoulder, L...Protrusion length, 1'...Ceramic insulator with shortened axial length, L'...Protrusion length, 10
...High voltage lead wire, 10'... Conductor wire, 11... Through hole, 12... Center electrode, '13... Connector pin, 14... Eyelet fitting, 15... Spiral groove, 16...
Coil spring type metal sleeve, 16'...free end, 17...insulating tube, 18...metal sleeve.

Claims

[Scope of utility model registration request]

A ceramic insulator with a large diameter part in the center that penetrates and fixedly supports the center electrode, and a front mounting bracket that has an outer electrode at the tip and covers the area from the tip of the ceramic insulator to the large diameter part. and a rear mounting bracket that is screwed together and covers the rear part of the ceramic insulator, and a piezoelectric element interposed between the rear shoulder of the central large diameter part of the ceramic insulator and the rear mounting bracket. and when installed in the engine combustion chamber,
In a spark plug with a built-in pressure pickup that detects the axial component of cylinder pressure applied to a ceramic insulator using a piezoelectric element and converts it into an electrical signal, the connection between the center electrode and the high-voltage lead wire is made of a ceramic insulator. A connector pin having a hoop-shaped cross section is provided in the center electrode through hole, is provided at the connection end of the center electrode, and is electrically connected to the electrode.
A spark plug with a built-in pressure surprise, characterized in that the spark plug is fitted into and connected to an ail spring-type metal sleeve provided at a connecting end of a high-voltage lead wire and electrically connected to the conducting wire of the high-voltage lead wire.