My LaVida car is very noisy. What are the factors that affect noise?

Hello! There is noise in the car. According to where it comes from, it is analyzed in the following situations:

1, engine noise

Abnormal engine noise is naturally the first, and it is also the most obvious kind of automobile noise. Engine noise is divided into cold car abnormal noise and hot car abnormal noise. Abnormal noise of cold car refers to the abnormal noise from the engine compartment when the car is driving, and it disappears automatically after hot car. This abnormal noise is probably due to the long-term parking of the car, and the lubricating oil basically flows back to the oil pan. During cold start, the oil pump can't establish the oil pressure at the first time, and an oil film is formed between components, especially the valve inside the cylinder head (upper part), which can't be lubricated during cold start. Both the hydraulic tappet and the mechanical rocker arm have a certain valve clearance, or the clicking sound caused by insufficient oil pressure timing or the failure of the chain (with intelligent variable valve distribution or valve lift system) cannot work normally.

There are many reasons for the abnormal sound of hot cars. Excluding its own factors, abnormal noise is probably caused by some kind of fault, such as high oil viscosity, carbon deposition in engine cylinder, valve leakage and so on. Therefore, if you notice that the engine noise is getting louder and louder, you should go to the repair shop for repair in time.

2. Tire noise

Tire noise is found in every car, but the sound level is different. Tire noise is usually caused by airflow between tire patterns. Because tires are rubber products, they are easy to age and harden after being used for a long time, and the noise can be imagined naturally; The new tire has good elasticity and good performance in noise and comfort. If the tire noise is too high, you can check whether the tire is aging. If necessary, you can replace it and choose a tire with better comfort.

3. Wind noise

Wind noise, like tire noise, occurs in every car, but there are several kinds of wind noise. One is the noise caused by the pressure change caused by the separation of airflow around the car body; Second, air leakage, or inhalation sound, is the noise generated by the interaction between the gap between the cab and the car body and the airflow around the car body; Third, other noises, including cavity noise. The faster the driving speed, the greater the wind noise. Installing sealing strips can reduce wind noise.

4. Chassis noise

Generally speaking, chassis noise is caused by the problem of shock absorber, and the whole vehicle will produce great noise when passing through uneven road surface. At this time, it is necessary to check whether the shock absorber of the car is abnormal, because the reason for the abnormal sound is probably a serious oil leakage.

At this point, we have also introduced the basic noise and treatment methods of the car, but for example, wind noise and engine noise, if it is not the problem of the old car, then we can try to soundproof the whole car.