Kinetic energy recovery systems (KERS) are systems used in Formula 1 vehicles (ex. a race car) in order to recover kinetic energy for future use. It works by converting the energy of motion when the car decelerates (which would've been lost as heat without a recovery system) into electrical energy which is stored in a battery, supercapacitor, or as mechanical energy in a flywheel. The driver can then press a button on their steering wheel, discharging the battery to motion of the drive shaft and giving their vehicle a boost of power.
KERS uses three main components to do its job:
The KERS uses a "charge cycle" and a "boost cycle"—the former occurring upon deceleration in order to store the kinetic energy, and the latter occurring when the driver presses the KERS button.
The schematic below shows how a kinetic energy recovery system works.
For further information please see the related pages below: