Cylinder head and spark plug assembly and method of using the sa

Details Cylinder head and spark plug assembly and method of using the sa Cylinder head and spark plug assembly and method of using the sa

1994-07-05

1995-07-25

Macy, Marguerite

Internal-combustion engines

Igniters

Sparkers

123169E, 1231933, F02B 7508

Patent

active

054352789

ABSTRACT:
A cylinder head and spark plug assembly for mounting on an engine block to create a combustion chamber for burning fuel and method for assembling the same are disclosed. A cylinder head has an end wall with an exterior surface and an interior surface and a spark plug bore extending downstream from the exterior surface to the interior surface. The spark plug bore has a seal surface adjacent the interior surface and external threads disposed upstream from the seal surface. A spark plug includes a body terminating in an end portion having a seal surface thereon, a nut and external threads disposed between the nut and the seal surface. The external threads of the spark plug are threadedly retained within the internal threads of the spark plug bore with the spark plug seal surface cooperating with the cylinder head seal surface in an interference fit eliminating any crevice between the end portion of the body and the spark plug bore downstream of the interference fit. Therefore, combustible fuels cannot reside in crevices between the body and the bore and escape being ignited during fuel burning in the combustion chamber.

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