What Is a Camshaft?
For an engine to operate, a mixture of air and fuel needs to be introduced to the combustion chamber which, when detonated by a spark, causes the pistons to move and turn a drive-producing crankshaft.
The fuel mixture needs to be introduced and the exhaust gases removed using valves, which are very precisely opened and closed by the engine’s camshaft. This shaft has several eccentric lobes attached to it that can effectively push against the valves to open them strategically, while valve springs allow them to return to their “shut” position to complete the process.
Some engines have one camshaft, while others may have two, but the job is the same – to operate the valves and control compression.