There are many types of steering shock absorber. At present, the hydraulic damping steering shock absorber is widely used, mainly because it has a strong reducing effect on the high-frequency shimmy of the steering wheel and has little effect on the normal steering movement. According to whether its damping can be adjusted and controlled actively or not, steering shock absorber can be divided into passive type and active control type.

The damping characteristics of passive steering shock absorber are determined in design and manufacture, and the damping force can not be adjusted according to the driving conditions of the vehicle. Although it can control steering wheel shimmy well, it has some adverse effects on vehicle steering portability. Especially when the vehicle swerves suddenly to avoid danger at high speed, the damper will produce an additional steering resistance, which is not conducive to the steering control and the driving safety of the vehicle. The active control steering damper can adjust the damping actively according to the driving conditions of the vehicle, which can give consideration to the damping efficiency and steering portability, thus overcoming the shortcomings of the passive steering damper.