What is the primary function of a crankshaft in an engine?

The primary function of a crankshaft in an engine is to convert linear piston motion into rotational motion. As the pistons move up and down in the cylinders due to combustion, the crankshaft translates this vertical movement into rotational movement, which ultimately powers the engine's drive train. This rotational energy generated by the crankshaft is essential for the vehicle's movement, as it transfers power to the transmission system and, subsequently, to the wheels.

Understanding this function highlights the crucial role of the crankshaft in the overall operation of an internal combustion engine. By converting the linear motion of the pistons, the crankshaft enables the continuous rotation of the engine's output shaft. Without this conversion, the engine would not be able to deliver power effectively to move the vehicle forward.