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overhead camshaft
overhead camshaft n (Automotive Engineering) a type of camshaft situated above the cylinder head in an internal-combustion engine. It is usually driven by a chain or a toothed belt from the crankshaft and the cams bear directly onto the valve stems or rocker arms overhead camshaft
overhead camshaft[′ō·vər‚hed ′kam‚shaft] (mechanical engineering) A camshaft mounted above the cylinder head. overhead camshaftThe camshaft of an aircraft reciprocating engine, located above the cylinder head, which operates the valves directly without the aid of the push rods.See OHC See OHC |