The main role and working principle of Audi VW rear shock bump stop

- May 13, 2019-

Audi VW rear shock bump stop suspension system generates vibration due to the impact of the elastic components. In order to improve the ride comfort of the vehicle during use, the shock absorber is installed in parallel with the elastic element in the suspension to reduce vibration and is used in the vehicle suspension system. The damper is mostly a hydraulic damper. The working principle is that when the frame (or the body) and the axle are relatively moved by vibration, the piston in the damper moves up and down, and the oil in the damper chamber It repeatedly flows from one chamber through different pores into the other chamber.


The friction between the hole wall of the Audi Volkswagen rear shock absorber and the oil and the internal friction between the oil molecules form a damping force to the vibration, so that the vibration energy of the vehicle is converted into oil heat energy, which is then absorbed by the damper and released into the atmosphere. When the oil passage section and other factors are constant, the damping force increases or decreases with the relative movement speed between the frame and the axle (or wheel) and is related to the viscosity of the oil.


The damper and the elastic element bear the task of cushioning and damping, and the damping force is too large, which will deteriorate the suspension elasticity and even damage the damper connector. The contradiction between the elastic element and the damper is adjusted due to the surface.


(1) In the compression stroke (the axle and the frame are close to each other), the damping force of the damper is small, so as to fully exert the elastic action of the elastic member and mitigate the impact. At this time, the elastic member plays a major role.


(2) During the suspension extension stroke (the axle and the frame are far apart from each other), the damping force of the damper should be large and the vibration can be quickly damped.


(3) When the relative speed between the axle (or wheel) and the axle is too large, the damper is required to automatically increase the flow of the fluid so that the damping force is always within a certain limit to avoid excessive shock. Load.