all-wheel drive vehicle will be more excellent than 2WD (FWD points and RWD) and security. In theory, AWD 2WD more than more than doubled traction, driving the car is based on its continued smooth traction, stability and traction is mainly determined by the method of driving the car, the engine power output will be assigned to four by the transmission system tires allocated to the two tires compared, the result is AWD can easily travel in 2WD not safe driving in traffic, the car has agile handling, to achieve security and stability, that is, no matter what the weather and how to travel kinds of pavement (on wetlands, rugged mountain road, detours); the driver can easily control every movement, thus ensuring the safety of the driver and passengers. It is because of the presence of AWD, in order to provide a car ldquo; active safety, active driving rdquo; opportunities.