What function does a rocker arm serve in an engine?

The rocker arm plays a crucial role in the operation of an engine by transferring the motion from the camshaft to the valves. When the camshaft rotates, it pushes on the rocker arm, causing it to pivot and move. This action allows the rocker arm to open and close the intake and exhaust valves at the correct timing in relation to the engine's cycle.

This function is vital for the proper operation of the engine, as the opening and closing of the valves regulate the flow of air and fuel into the combustion chamber and the expulsion of exhaust gases. The design and movement of the rocker arm are essential for ensuring efficient engine performance and optimal combustion.

While other functions mentioned, such as managing engine timing or controlling fuel injection, are important aspects of engine operation, they are carried out by different components. The rocker arm specifically focuses on the valve operation, making it integral to the overall function of an internal combustion engine.