Illustration of Compressor Mode. I) Intake of fresh air, II) Compression of air and pressure tank charging. Right port is connected to the pressure tank
The most commonly used form of regenerative braking is where a vehicle’s electric motor is used as an electric generator to capture the vehicle’s kinetic energy, which is otherwise lost as heat when braking. The generator converts the kinetic energy into electricity that is then fed back into the vehicle’s battery pack where it is stored for later use. New research suggests that pneumatic or air hybrids that instead store the energy as compressed air would be much cheaper to produce than the current crop of EVs and battery-electric hybrids and could halve the fuel consumption of ICE powered vehicles.