Please set me file I want the working principle of kers bicycle in pdf

A kinetic energy recovery system (often known simply as KERS, or kers) is an automotive system to recover the kinetic energy of a moving vehicle under braking. The recovered energy is stored in a tank (eg a flywheel or high voltage batteries) for later use in acceleration. Examples include high-end complex systems such as the Zytek, Flybrid, Torotrak and Xtrac used in Formula One racing and systems based on simple, easy to manufacture and integrated differentials such as the Passenger / Commercial Vehicle Kinetic Energy Recovery System ( CPC-KERS) from Cambridge.

Xtrac and Flybrid are both concessionaires of Torotrak technologies, which employ a small and sophisticated auxiliary gearbox that incorporates a continuously variable transmission (CVT). The CPC-KERS is similar as it is also part of the transmission set. However, the entire mechanism including the steering wheel is entirely in the vehicle's hub (it looked like a drum brake). In the CPC-KERS, a differential replaces the CVT and transfers the torque between the steering wheel, the driving wheel and the wheel of the road.