A camshaft is a key component in an engine that controls the opening and closing of the valves. It has cam lobes, or raised sections, that push against the valves, allowing fuel to enter and exhaust to exit the engine's cylinders. Full definition
The engine features dual overhead camshafts with variable valve timing, low - friction cylinder walls, bucket tappets (as opposed to rocker arms) and an impressive 11:1 compression ratio. (kbb.com)
I had an error code on my»97 Ranger that said it needed a new camshaft position sensor, but since the truck still ran fine I put off replacing it. (mechanics.stackexchange.com)
4 valves per cylinder, 4 overhead camshafts timed by 2 chains, Electronically controlled continuous timing variator. (lambocars.com)