What Is the Function of a Camshaft?

Mazda Mxtree/CC-BY 2.0

A camshaft in an internal combustion engine makes it possible for the engine's valves to open and close. The camshaft is a cylinder that aligns with the engine's cylinders. The asymmetrical lobes of the camshaft correspond to the engine's valves. As the camshaft rotates, it opens and closes the engine's valves.