What does the crankshaft do in an engine?

The crankshaft plays a crucial role in converting the linear motion generated by the pistons into rotational motion, which is essential for driving the engine's output. As the pistons move up and down within the cylinders, they are connected to the crankshaft through connecting rods. When the pistons move down due to combustion, this linear movement causes the crankshaft to rotate. This rotation is what ultimately powers the vehicle by turning the wheels or driving other components of the engine.

The crankshaft's design is such that it transforms this vertical motion into a continuous circular movement, enabling efficient energy transfer throughout the engine and to the drivetrain. This conversion is fundamental to the engine's operation, making the crankshaft an integral component in internal combustion engines.