Home » How it works ? » The ClutchThe ClutchThe cars need to have a clutch. The reason is that the #engine stays rotating while the wheels are stop at the same time , Thus there is no need to turn off the engine when you need to stop the wheels from moving. In addition, the Related Posts:Engine lubrication circuitStirling EngineGear BoxDifferential GearsCar Engine partsWankel EngineKhaled Saleh