There will be a knock when the car walks on the bumpy road. Why?

Generally, when the road surface is bumpy, the vehicle chassis is most likely to make abnormal noise. If there is a clanging sound on the road, first check the automobile shock absorber and judge which position it is according to the position of the sound. When the car is parked on the flat ground, the distance between the car and the ground is too small, which is not conducive to checking the fault. It is best to go to the 4S shop or repair shop to lift the vehicle by crane, and check whether there is a gap in the shock absorber and whether the suspension is faulty. If the shock absorber leaks oil, it may be that the oil seal washer is faulty and the shock absorber needs to be replaced.

When you walk on the bumpy road, the car body will also have abnormal sound, mainly because the car body is squeezed on the bumpy road, such as abnormal sound of the skylight and abnormal sound of the door. This requires us to clean and lubricate the skylight guide rail and the four door sealing strips.

Matters needing attention of cars on bumpy roads

According to our normal driving habits, the normal speed of urban or rural roads is generally between 40 and 80. However, although the state has no clear regulations on obstacles such as speed bumps, the enterprise regulations generally do not exceed 5 cm high. Judging from the design of such obstacles, the safest passing speed should be no higher than 20. If the passing speed exceeds 40, the comfort of passengers will be affected.

When the passing speed exceeds 60 or even 80, the impact on the car body will reach several times or even ten times that of 20. Judging from the common deceleration obstacles at present, if the damage to the car body is arranged from low to high, the conventional deceleration zone should be very low, the cement deceleration zone has the greatest lethality, and the hard mound may be in the upper-middle position.