Back to results
US 2014/0020646 A1Published application
Gasket for attaching spark plug and ignition system
AssigneeDenso Corporation
InventorYasushi KAWASHIMA
Life of this patent
Estimating the term…
Abstract
A gasket for attaching a spark plug to an internal combustion engine, the gasket having an annular portion. The annular portion is annular to surround the spark plug, and has contact surfaces on both axial ends, one of the contact surfaces being to contact the spark plug, the other being to contact the internal combustion engine. The annular portion is composed of copper alloy containing aluminum oxide. The aluminum oxide content of the copper alloy is 0.3 wt % or more, and 0.7 wt % or less.
Claims5
A gasket for attaching a spark plug to an internal combustion engine, comprising:
- an annular portion capable of surrounding the spark plug, being composed of copper alloy containing aluminum oxide, the aluminum oxide content of the copper alloy being 0.3 wt % or more, and 0.7 wt % or less;
- and
- contact surfaces on both axial ends of the annular portion, one of the contact surfaces being configured to contact the spark plug, the other being configured to contact the internal combustion engine.
An ignition system, comprising:
- a spark plug having an axis;
- a wall member configured to form a combustion chamber of an internal combustion engine;
- and
- a gasket capable of being sandwiched between the wall member and the spark plug with axial load of the spark plug,
- wherein:
- the gasket has an annular portion capable of surrounding the outer periphery of the spark plug, and has contact surfaces, one of the contact surfaces being configured to contact the spark plug, the other being configured to contact the wall member;
- the annular portion is composed of copper alloy containing aluminum oxide;
- and
- the aluminum oxide content of the copper alloy is 0.3 wt % or more, and 0.7 wt % or less.
6 more elements
Dependencies are inferred from the claim text.