ABSTRACT
The drive train serves two functions: it transmits power from the engine to the drive wheels, and it varies the amount of torque. The main parts of a drive train for conventional ground vehicles are the engine, clutch, transmission, differentials, shafts, brakes, and wheels. A hybrid drive train combines two or more power sources in general. Usually a conventional combustion engine is combined with an electric motor where the drive sources may operate in series or parallel. In an electric-drive vehicle, the torque is supplied to the wheels by one or more electric motors. The possibility to provide individual and easily controllable driving torques at the wheels offers a lot options to improve the traction and the handling of a vehicle. The active center differential is an electronically controlled hydraulic multi-plate clutch that distributes torque between the front and rear to improve traction under acceleration out of a corner.
