What is the Principle of Four-Wheel Drive?

[McHeidi]

The principle of four-wheel drive is: it can distribute the engine output torque in different proportions to all front and rear wheels according to the driving road conditions to improve the vehicle's driving capability. Four-wheel drive, also known as all-wheel drive, means that both the front and rear wheels have power. Four-wheel drive is generally represented by 4X4 or 4WD. If you see these markings on a vehicle, it means the vehicle has four-wheel drive functionality. In the past, only off-road vehicles used four-wheel drive. Generally, off-road vehicles are equipped with a manual transfer case behind the transmission, and each of the front and rear axles is equipped with a component called a drive axle. The torque output from the transmission is transmitted to the drive axles on the front and rear axles through the transfer case and drive shafts, and then the torque is transmitted to the wheels through the drive axles.