What is the main role of the crankshaft in an engine cycle?

The crankshaft plays a crucial role in an engine by converting the linear motion of the pistons into rotary motion. As the pistons move up and down within the cylinders during the combustion process, they are attached to the crankshaft through connecting rods. This movement causes the crankshaft to rotate.

This conversion is essential because it allows the engine to effectively transfer power to the drivetrain, enabling the vehicle to move. The rotation of the crankshaft is what ultimately drives the wheels of the vehicle, transforming the energy generated from fuel combustion into kinetic energy.

While other components of the engine handle tasks like igniting the fuel-air mixture, compressing the air and fuel, and regulating valve timing, the crankshaft is specifically designed for the conversion of motion, making it a pivotal component in the engine's operation.