What is the function of the engine valve train?

The engine valve train is responsible for controlling the timing and movement of the engine's intake and exhaust valves. It ensures that the valves open and close at the correct intervals during the engine's cycle to facilitate efficient air and fuel intake and exhaust gas expulsion. The valve train typically consists of components like camshafts, pushrods, rocker arms, and lifters, which work together to translate the rotational motion of the crankshaft into linear motion that operates the valves. Proper functioning of the valve train is crucial for optimal engine performance, efficiency, and emissions control.