what is the function of flywheel?

Flywheel or Inertia wheel used in a machine acts as a temporary reservoir of energy which stores energy when the energy supply is more than required for an operation and releases the stored energy when the supply power does not adequate with the needs. In case of the IC engines, the torque on the crankshaft fluctuates during one completed cycle of operation that causes a change in the angular velocity of the shaft. In order to obtain a uniform torque, an inertia mass is provided at the end of the shaft, known as the flywheel