Shock absorber is used to suppress the shock of spring rebound after shock absorption and the impact from the road. It is widely used in automobiles to accelerate the attenuation of frame and body vibration and improve the ride comfort of automobiles. When passing through the uneven road, although the shock absorbing spring can filter the vibration of the road, the spring itself will move back and forth, and the shock absorber is used to restrain the spring jump.

The shock absorption system of automobile is composed of spring and shock absorber. The shock absorber is not used to support the weight of the vehicle body, but to suppress the shock of the spring rebound after shock absorption and absorb the energy of road impact. The spring plays the role of mitigating the impact, changing "one-time impact with large energy" into "multiple impact with small energy", and the shock absorber is to gradually reduce the "multiple impact with small energy". If you drive a car whose shock absorber is broken, you can experience the bouncing of the car after passing through each pit and fluctuation, and the shock absorber is used to suppress this bouncing. Without the shock absorber, the rebound of the spring can not be controlled. When the car meets the rough road, it will produce serious bounce. When cornering, it will also cause the loss of tire grip and tracking due to the up and down vibration of the spring.