Generally, the following faults are manifested after the shock absorber is damaged:
1. The shock absorber leaks oil. The outer surface of the normal damper is dry and clean. If oil leaks out, the hydraulic oil inside the damper is pulled out from the upper part of the piston rod. In this case, the damper has basically failed;
2. When the car passes over a bumpy road or a speed bump, a certain wheel makes a “beep” sound, indicating that the shock absorber on this wheel has poor damping effect or failure;
3. When the car is cornering, it obviously feels that the body roll is increased. In severe cases, even side slip occurs. This is mainly because the damping force of the damper is too small to effectively suppress the compression of the spring;
4. After driving for a period of time under rough road conditions, touch the damper shells by hand and feel the temperature of the damper. Under normal circumstances, the damper housing is warm, if a damper housing is cool. , indicating that the shock absorber has been damaged;
5. When the car is in a stopped state, when the corner of the car body is pressed down and released, the body will rebound under the spring force. If it rebounds, it will stabilize soon, indicating that the shock absorber is good; if it is repeated shocks After stopping it, it shows that the damping effect of the damper is a bit worse.
Car shock absorber function:
The shock absorber on the car is an important component in the car suspension system. Its function is to restrain the spring from absorbing vibration and the shock when the spring rebounds, and to absorb the impact from the road. It directly affects the ride comfort and maneuverability of the car, which in turn affects our driving safety.
When the car is driving on a rough road surface, the wheel is subjected to the ground impact force and transmitted to the vehicle body through the elastic element spring in the suspension system, thereby causing vibration of the vehicle body. During this process, the spring is constantly stretched and compressed, and oscillated under the action of inertia.
And in this process, because the adhesion between the wheel and the ground constantly changes, and even the wheel will leave the ground and lose the adhesion, the car will run out of control, which is the impact of the shock absorber on the handling of the car. The function of the damper is to delay the speed at which the spring is stretched and compressed, and absorb the shock caused thereby, so that the spring tends to stabilize quickly after deformation.
If there is no damper, the spring will be compressed again and rebound after rebounding, and the car body will rebound several times before it will stabilize, resulting in uncomfortable ride and poor car handling. Therefore, the damper is used to dampen the vibration of the spring of the car suspension when it rebounds. It is to reduce the vibration of the spring, instead of damping the body.