MGU-K - Motor Generator Unit Kinetic

Renault 2014 Power Unit (engine)

MGU-K: the motor generator unit kinetic, or MGU-K, is a component of the hybrid powertrain in Formula One. The MGU-K is a device that recovers and stores energy produced under braking and converts it into electricity that can be used to boost acceleration. It works in conjunction with the MGU-H, which harvests energy from exhaust gases and transmits it as electricity to the MGU-K for storage.

The type of energy stored by the MGU-K is kinetic energy that comes from braking. This stored energy is then released with the help of an electric motor, which causes the wheels to rotate faster than they would have otherwise when accelerating out of a corner or passing another car on track.