An anti-stall system is an automatically operated electronic clutch control device preventing the stalling of an engine by engaging the clutch when the ECU detects that the engine revs are too low. They are used in motorsports such as Formula One and Indy Car, but not Formula 2 and Formula 3, and may be regarded as a driver aid since it usually keeps the engine running even if the car stops on track while in gear. It is also sometimes used on production cars.