Suspension system is the general term for the car frame and axle or wheel between the transmission and connection device, and its role is the transfer function between the wheels and the frame force and twisting force and buffer by uneven pavement passed to the frame or body of the impact, and the attenuation caused by the vibration, to ensure that the vehicle can travel smoothly.

The suspension system and the car's engine and transmission are known as the three major components of the car, is the core technology of a car. So judge a car good and bad, first of all to look at the three major systems. The basic structure of the automobile chassis knowledge suspension system is modern.

More and more attention to the car ride comfort, so that consumers tend to be the car's comfort as an important measure to buy an important measure. In fact, vehicle ride comfort in addition to the softness of seat, supporting force and other factors, the largest is the automobile suspension system it is between the frame and axle connected to the power transmission parts, on other properties such as driving safety, through sex, stability and adhesion properties have a significant impact. In a car to look at cars in the process, often see such as McPherson type in profile, multi link, double rod type, four connecting rod type, a torsion beam type a variety of front and rear suspension system, due to less aware of the mechanical knowledge, here will be the common suspension system as to introduce and explain the advantages and disadvantages. Suspension system is simple to say, the car suspension includes three parts of the elastic element, shock absorber and force transmission device, respectively, buffer, vibration and the role of force transmission. Speaking from the car, elastic element refers to the spiral spring, it only bear vertical load, relaxation and inhibition of uneven road to face the body impact, occupies small space, the quality of small, no need of lubrication, but due to the fact that there is no friction and no damping effect. Vibration damper and hydraulic shock absorber, its function is to accelerate the attenuation of the vibration of the body, it is also the most sophisticated suspension system of mechanical parts. Force transfer device refers to the frame of the upper and lower arm fork frame etc.,

Steering knuckle and other components, used to convey the longitudinal force, lateral force and torque, and to ensure that the wheel relative to the vehicle frame has determined the relative movement of the law. In practice, as long as the above three kinds of functions are also feasible.