Answer :
Final answer:
The camshaft is the mechanism that opens and closes the valves in an overhead valve system (OHV). It is driven by the engine's crankshaft and contains lobes that lift the valves at the appropriate times. The valves are actuated by lifters, pushrods, and rocker arms.
Explanation:
In an overhead valve system (OHV), the camshaft is the mechanism that opens and closes the valves. The camshaft is driven by the engine's crankshaft and contains lobes or cams that lift the valves at the appropriate times. These valves are actuated by lifters which are pushed up and down by the pushrods. The pushrods are connected to rocker arms which transfer the motion from the pushrods to the valves, causing them to open and close.
