Spark plug arrangement in an overhead camshaft engine

Internal-combustion engines – Particular piston and enclosing cylinder construction – Cylinder detail

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123432, F02F 132

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050092049

ABSTRACT:
An overhead camshaft engine has a cylinder head, two intake valves and two exhaust valves at each cylinder. A plug hole is formed in a space of a cylinder head between the intake valves and between the intake valves and a camshaft. An end of the plug hole is opened to a combustion chamber at a center position thereof. A spark plug is mounted in the plug hole, so that a center electrode of the spark plug is positioned at the center position.

REFERENCES:
patent: 4553515 (1985-11-01), King et al.
patent: 4714059 (1987-12-01), Masuda et al.
patent: 4741302 (1988-05-01), Oda et al.

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