Driving and Braking a Stop/Start Hybrid

Driving

The gasoline engine does not run when the vehicle is at rest.

When pulling out, the electric starter/generator uses electricity from the battery to instantly start the gasoline engine---the sole source of propulsion for the vehicle.

The generator may also convert energy from the engine into electricity and store it in the battery.

Braking

Stop/Start vehicles use a combination of regenerative and conventional friction braking to slow the vehicle.

In regenerative braking, energy from the wheels turns the electric generator, creating electricity. Using energy from the wheels to turn the generator slows the vehicle.

The engine shuts off to conserve energy when the vehicle comes to a stop.