JPS58138288U

JPS58138288U - Internal combustion engine spark plug

Info

Publication number: JPS58138288U
Application number: JP3548882U
Authority: JP
Inventors: 雅彦中田
Original assignee: トヨタ自動車株式会社
Priority date: 1982-03-12
Filing date: 1982-03-12
Publication date: 1983-09-17

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 the drawing]

第１図は本考案の一実施例を示す点火栓の一部を切り欠
いた正面図である。第２図および第３図は、それぞれ本
考案の他の実施例を示す正面図である。１０：ねじ部、１２：接地側電極、１４：胴部、１６二
基体、１８：中央電極、２０：絶縁体、２４：圧力セン
サ（圧力検出手段）、２６：圧力検出ポート（圧力検出
手段）、２８：通路（圧力検出手段）、３０．３４：圧
力検出素子（圧力検出手段）、３２：リード線（圧力検
出手段）。FIG. 1 is a partially cutaway front view of a spark plug showing an embodiment of the present invention. 2 and 3 are front views showing other embodiments of the present invention, respectively. 10: Threaded part, 12: Ground side electrode, 14: Body part, 16 Two bases, 18: Center electrode, 20: Insulator, 24: Pressure sensor (pressure detection means), 26: Pressure detection port (pressure detection means) , 28: Passage (pressure detection means), 30.34: Pressure detection element (pressure detection means), 32: Lead wire (pressure detection means).

Claims

[Scope of utility model registration request]

(1) A tubular body having a threaded portion to be screwed into an internal combustion engine, a grounding electrode formed at the lower end of the threaded portion, and a body portion extending above the threaded portion and having a larger outer diameter than the threaded portion. A base body;
an insulator that is fitted into the upper end of the base and fixed to the base, and whose lower end fixes and electrically insulates a central electrode facing the ground-side electrode, the ground-side electrode; In an ignition plug for an internal combustion engine that ignites an air-fuel mixture in a combustion chamber by discharge between the center electrode and a central electrode, pressure detection means for detecting the pressure in the combustion chamber is provided, and at least discharge portions of the center electrode and the ground electrode are provided. An ignition plug for an internal combustion engine, characterized in that the surface layer of the ignition plug is formed of an oxidation-resistant high-melting point metal to improve durability and reduce cost per hour of use.

(2) The ignition plug for an internal combustion engine according to claim 1, wherein the oxidation-resistant high-melting point metal is a platinum metal.

(3) A claim for registration of a utility model in which the pressure detecting means is a pressure detecting element fixed at the innermost position within the lower opening and has a lead wire airtightly drawn out from within the lower opening of the base body. A spark plug for an internal combustion engine according to item 1 or 2.

(4) The pressure detection means is an annular pressure detection means that is fitted into the threaded portion of the base and is sandwiched between the threaded portion and the body of the base of the internal combustion engine when the threaded portion is screwed into the internal combustion engine. The ignition plug for an internal combustion engine according to claim 1 or 2 of the utility model registration claim, which is an element.

(5) The pressure detection means includes a lower opening of the base and a pressure detection port provided on the outside of the base. A utility model according to claim 1 or 2, which includes a passage formed between the lower opening and transmitting the pressure of the lower opening to the pressure detection port, and a pressure sensor connected to the pressure detection port. Spark plug for internal combustion engine.