Spark plug having combustion pressure detecting function

Details Spark plug having combustion pressure detecting function Spark plug having combustion pressure detecting function

2007-09-25

2007-09-25

McCall, Eric S. (Department: 2855)

Measuring and testing

Engine detonation

Specific type of detonation sensor

Reexamination Certificate

active

11392622

ABSTRACT:
A spark plug having a combustion pressure detecting function, including a tip end portion in an axial direction of the spark plug capable of generating a spark discharge, a male thread adapted for attaching the spark plug to an internal combustion engine and a metal shell including, at a rear end side of the male thread, a brim portion projecting perpendicularly to the axial direction; an annular, flat gasket provided on a tip side of the brim portion; and a pressure sensor including a pressure-sensitive element, wherein the gasket has a Young's modulus E (kN/mm2) satisfying a relationship, 100≦E≦170.

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