The valve train is a crucial component of an internal combustion engine, responsible for controlling the opening and closing of the engine's valves. It ensures that the correct amount of air and fuel enters the combustion chamber and that exhaust gases are expelled efficiently. The valve train typically consists of parts like camshafts, rocker arms, and valves. In most engines, the valve train operates in sync with the engine's crankshaft, allowing for precise timing. This synchronization is vital for optimal engine performance and efficiency. Different engine designs, such as overhead cam or pushrod systems, influence how the valve train is configured and functions.