Why does a new car feel bumpy when driving?
1 Answers
The reasons why a new car feels bumpy when driving are as follows: Suspension system failure: In the suspension system, the absorption of bumps mainly relies on springs, while the hydraulic shock absorber's role is to reduce the number of repeated extensions when the spring absorbs vibrations, thereby greatly improving the vehicle's smoothness. When the hydraulic shock absorber fails, the repeated extension of the spring will not be suppressed, causing the vehicle to bounce up and down and resulting in a bumpy feeling. Oil leakage and pressure loss in the shock absorber, dust accumulation increasing resistance, and deformation of the shock absorber rod can all lead to hydraulic shock absorber failure. Tire imbalance: A tire is usually composed of a steel rim and a rubber tire. Due to material and processing reasons, the mass of the steel rim and rubber tire is not uniform, which can cause severe shaking when rotating at high speeds, resulting in a bumpy feeling. Incorrect wheel alignment: Wheel alignment refers to the toe angle, camber angle, as well as the caster angle and kingpin inclination angle of the wheels. When a new car leaves the factory, these angles are already set. However, as the mileage increases and the suspension is repeatedly stressed, these angles can change slightly. When these angles change, the tire's contact surface and the vehicle's thrust line may also change, leading to a bumpy feeling when driving on flat roads.
