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Difference between revisions of "Single overhead camshaft"
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'''SOHC''' stands for '''single overhead cam''' | '''SOHC''' stands for '''single overhead cam''' and is a design in which one [[camshaft]] is placed within the cylinder head. In an inline engine this means there is one camshaft in the head, while in a V engine or a horizontally-opposed engine (boxer; flat engine) there are two camshafts: one per cylinder bank. | ||
The SOHC design has less reciprocating mass than a comparable [[pushrod]] design. This allows for higher engine speeds, which in turn will increase power output for a given torque. The cam operates the [[valve]]s directly or through a [[rocker arm]], as opposed to overhead valve [[pushrod]] engines which have tappets, long pushrods, and [[rocker arm]]s to transfer the movement of the lobes on the camshaft in the engine block to the valves in the cylinder head. | |||
SOHC designs offer reduced complexity compared to pushrod designs when used for multi-valve heads in which each cylinder has more than two valves. Of all [[valvetrain]] systems, this is the least complex configuration possible. | |||
==See Also== | |||
*[[Unicam]] | |||
[[Category:Motorcycle technology|SOHC]] | [[Category:Motorcycle technology|SOHC]] | ||
[[Category:Motorcycle engines]] | |||