All-wheel drive (NWD): is the unique form of off-road vehicles. (Such as BJ2020 Cherokee, etc.). Usually the front of the engine, after the transmission with a transfer device, so that the power were delivered to all the wheels. All-wheel drive power is good, climbing and off-road ability. But with a separate front and rear drive compared to the structure of complex, high cost, low transmission efficiency.
The Engine front, rear wheel drive (FR): most of the domestic and foreign truck, some cars and some buses are used in this traditional form of drive. It is the front wheel steering, rear wheel drive, the engine output power through the clutch - transmission - drive shaft to the drive axle, in this deceleration after the transfer to the back of the left and right axle, driving the rear wheel to run the car, Front and rear wheels of their duties, steering and driving separately, the load distribution is more uniform.
Rear engine, rear wheel drive (RR): it seems to be FF car replica, but the car before the "internal organs" moved to the car. Such vehicles to maintain the advantages of FF cars, but also eliminates the shortcomings of the FF car, as the layout of the vehicle tends to be reasonable, and the noise and temperature improvement, with its unique structure and good performance by the user's
Engine front, front wheel drive (FF): the 20th century, 90 years in domestic and foreign cars on the increasingly popular form of arrangement. In order to shorten the length of the vehicle, reduce the quality of the car, often before the engine placed in the front axle, the transmission after the things are moving forward, the transmission and drive axle into one, fixed in the engine next to the power directly to the front wheel, Chassis height, improved handling stability at high speed. Such as the common Audi 100 sedan, as well as micro-cars (Xiali, Alto, etc.) are used in the engine front, front-wheel drive drive system layout, common engine front, front axle drive car also has two to the structure: The engine axis is parallel to the front axle (such as the Xiali car); the second is the engine longitudinal (such as Santana, Audi and other cars).
