My car is noisy at high speeds, is there any way to fix it?

The main reason for the high wind noise when the car runs at high speed is the "drag coefficient", which is lower than that of sedan models and greater than that of SUV and MPV models; Then there is the NVH process level of the overall vehicle manufacturing, which is directly reflected in the suppression level of wind noise, tire noise, road noise and vehicle mechanical noise. Wind noise is the noise caused by the pressure change caused by the separation of the air flow around the body; The second is air leakage, or suction sound, which is the noise generated by the interaction between the inhalation of the cab and the body gap and the airflow around the body; The third is other noises, including cavities.

When the vehicle is driving at high speed, there will be a large amount of wind dryness, and the magnitude of these noises is related to the airtightness of the car. In order to reduce the dryness of the car, the first thing is to enhance the airtightness of key parts, and you can paste soundproof cotton on the hood, four doors and headliner.

and shock-absorbing adhesive to improve the airtightness of the vehicle. First of all, the vehicle has wind noise and tire noise, it is recommended to do the door sealing, which is the so-called sealing strip to reduce wind noise, and secondly, the tires are replaced with silent tires after the number of kilometers, and the wind noise is different when different cars are driving, the key is the appearance design and noise reduction treatment of the vehicle. Wind noise is transmitted into the car through various gaps and materials, and each type of material (glass, steel, plastic, etc.) conducts and attenuates different amounts of sound.

This requires the vehicle manufacturer to consider the wind noise and the speed of the vehicle in the design of the vehicle together with the appearance, and the most effective way to reduce the wind noise is to reduce the speed (nonsense) In addition, the only way to improve the tightness of the car is to install sealing cotton and sealing strips.

The magnitude of wind noise, the higher the speed, the greater the wind noise, and the greater the wind noise noise will be generated when driving at high speed, and the degree of these noises into the car is related to the air tightness of the vehicle, and the same environment and the same speed will not change suddenly. If the wind noise suddenly increases while driving.

At high speeds, car noise is mainly in three aspects: engine, tire noise, road noise, and wind noise. Engine noise is mainly related to the manufacturing process, sealing, and sound insulation materials of the car body of the main engine factory.

Tire road noise is mainly related to the specifications of the selected tire brand and road conditions. Wind noise is mainly related to the design of vehicle streamlining, cabin sealing, etc.

It is very likely that the owner put some stickers on the car after buying it, which caused the noise. It is also possible that there is a malfunction after the car has been modified, and if the door is not closed properly, there will be some noise. They can be excluded one by one.

You can check if there is a problem with the tire, because many tires will come into contact with the road surface, and if the stone happens to get stuck on the tire, the tire will also be damaged.

The first thing to do is to buy some seals to cover all parts of your car doors. There's also a clean-up of the engine, which will make you less noisy. Change to some better quality tires.

Let's take a look at what the problem is, if it is a tire problem, you can change it to a new tire, if it is an engine problem, repair the engine first, you can also solve such a problem, and the effect is more obvious.

You need to go to the 4S shop for maintenance and repair, it is likely that there is a problem with the engine, and it must be repaired in time.

Many people will find that the sound is particularly loud when they are driving, especially when they are on the highway, and this situation will also make them feel particularly nervous. Because they will be afraid that these sounds are louder, because some of the devices in the car have malfunctioned, so there will be such a loud sound. In fact, it is very normal for the engine to have a high level of sound at high speed, because at high speed, many people have to control the speed within a certain speed range when they drive.

On the engine at high speeds, it's loudSo if you increase your speed, the noise will become louder, and the wind speed will increase, and the noise will also become louder and the noise of the tires will also increase. Therefore, all of these reasons may cause a large amount of noise when running at high speeds. In addition, many people will also find that they may be hanging on a low gear, which is possible in the case of running at high speeds, resulting in a particularly loud engine.

This can be caused by high engine speeds, but also low gears and high-speed running.

The engine speed is relatively highIn addition, many people may have a certain impact on the car when they are in high gear, that is, they waste gasoline or cannot fully use the kinetic energy of the car. So these engines consume a lot of power in the process of running at high speeds, and many people may reach speeds of more than 90 kilometers per hour when they go at high speeds. Therefore, in this case, the noise in the car is mainly mixed with wind noise, tire noise and engine noise, and the sound is relatively loud in this case.

Wind noise, tire noise, and engine noise are mixed together, and the size of the wind noise is also related to a certain extent, and the sound of the car is also related to a certain extent, and some of them look relatively smooth, so the wind resistance is also relatively small. As a result, wind noise is likely to be relatively low, and some cars look more blunted in their styling. In this case, if they run at high speed, the wind resistance is also relatively large, so the wind noise is also relatively large.

Some high-end cars have a much smaller vibration, and the vibration of this exhaust sound will be relatively small.

In fact, in the process of high-speed driving, the car forms a pressure with the air, which is reflected in the shape of the car, and there will be sounds.

The reason for driving noisily on the highway is that the car is moving so fast that the obstacles on both sides of the road make the noise of the car tires reflect, and the interior of the car will feel very large, or it may be because the tires are noisy.

It may be because the water temperature of your car is high, you have to look at the water temperature gauge to see if it is normal and check if the belt is loose, which are all causes of loud noise.

It is because the engine of the car is very large, the speed of the body is very fast, and the wind outside the car is also very strong, so this sound is formed.

If the car owner is running at high speed, the car is noisy, and there are two ways to solve the problem of car noise. The first method is to carry out a sound insulation treatment on the car, so that the car can effectively reduce the noise when it is running at high speed; The second option is to replace the tires, as the noise generated by the tires is the loudest of all the noises in the car.

1. Make sound insulation treatment for the car.

Nowadays, many cars have actually done some sound insulation, but the sound insulation effect is not very good. For some low-end models, the noise is particularly loud when running at high speeds, because the sound insulation treatment of these cars is not done well. If the owner finds that the noise is particularly loud at the high speed of the car treasure, then you can make a sound insulation on the engine compartment, the upper part of the tire, and the body chassis of the car, and the sound insulation method is to do some sound insulation cotton where you need to do sound insulation, and then paste the shock absorbing belt, so as to effectively reduce the noise of the car, so as to improve the driving quality.

2. Replace tires.

Now there are a lot of soundproof tires on the market, and most of the noise of the car is caused by the tires, because the car is driving on the highway, and the friction between the tire and the ground increases, so the noise will be transmitted to the cab through the engine compartment of the car, bringing a very bad driving experience to the driver and passengers. So at this time, the owner can replace some silent tires on the car, and these silent tires can effectively reduce the noise, and the owner must go to the regular store to buy these silent tires when buying them, if you buy inferior products, the gains outweigh the losses. <>

3. Summary. In general, if the car is noisy at high speeds, the owner can reduce the noise of the car by renovating the sound insulation and changing the tires of the car. Car noise is an eternal topic, because car noise will be permanent, but car owners can physically reduce car noise, so as to increase the driving experience of drivers and passengers.

However, car owners usually have to regularly maintain the wearing parts on the car when driving, because these wearing parts will also produce a certain amount of noise after they are damaged. <>

When running at high speeds, you can close the windows, you can also open the inner circulation in the car, you can reduce the speed of running, you can also open the outer circulation, and you can change the tires.

Carbon deposits in the engine can be cleaned up and the spark plugs can then be replaced, so that noise can be reduced.

First of all, check whether there is any deformation or damage in the body part, and try to close the windows tightly when walking at high speeds, because the speed is fast at high speeds, and the wind will be heard when you open the windows.

1. Sealing strip sound insulation.

When the car has been driven for a long time, various crevices in the car will appear aging and hardening of the rubber strip, resulting in abnormal friction and abnormal noise when we are running at high speed, and even flying ash everywhere. There are also small places, such as car doors, windows, trunk cars, etc., as long as speed bumps, rotten road noise will appear.

At this time, it is necessary to replace the sealing strip, which can not only play the role of sound insulation, silence and dustproof to effectively reduce noise, but also isolate the dust There is a gap in the center console of the car, and the engine noise always comes out of the gap, and the dust is also large, and the items will often fall into it. It is mainly used on the door leaf, door frame, front and rear windshield, engine cover and trunk lid.

Second, the engine is cleaned.

When the engine is noisy, it is generally the aging phenomenon inside the engine, which causes the vibration to become louder and louder during operation. If the engine is significantly louder than before, it may be that the engine needs to be changed for maintenance or there is too much carbon inside the engine.

When carbon deposition is severe, it will affect the performance of the car, resulting in an increase in fuel consumption and a decrease in power. Therefore, we must maintain and clean the engine regularly, and always have cleaning agent in the car, so that the fuel tank can be poured directly without disassembly, and the inside of the engine can be cleaned without disassembly, which is very convenient. It can effectively remove all kinds of cement, scaling, carbon deposits and other deposits in the engine and oil duct.

3. Tire noise.

When the car is moving, there will be friction between the tires and the ground, and there will be noise at this time. Another reason is that the unevenness under the wheel cover of the car tires causes the airflow to divert the airflow, so the noise is generated. If you want to solve tire noise, you can first consider changing to silent tires, and you can also use some noise reduction equipment.

There are four "sources" of car noise: engine noise, tire noise, noise in the air, and noise caused by the body structure

1. Engine noise. In addition to the mechanical sound emitted by the engine block, it also includes the air intake system noise, that is, the high-speed gas enters the cylinder through the air filter, intake pipe, and valve, and during the flow process, a strong aerodynamic noise is generated. Engine noise is mainly transmitted into the cockpit from the fire barrier and the front floor of the cab.

2. Tire noise. The general tire noise is mainly composed of three parts: one is the air flow between the tire pattern and the air disturbance around the tire; the second is the tire vibration noise caused by the vibration of the carcass and the tread part; The third is the road noise caused by uneven road surface.

3. Air noise. One is wind noise, which is the noise caused by the pressure change caused by the separation of the air flow around the body; The second is air leakage, or suction sound, which is the noise generated by the interaction between the inhalation of the cab and the body gap and the airflow around the body; The third is other noises, including cavity resonance.

4. Body structure-borne noise. It is mainly affected by two factors, one is the vibration transmission mode of the body structure, and the other is the noise generated by the metal components on the body due to the vibration generated by the inside and outside.

Interior noise originates from the aging of some parts of the car. Just like the sealing strip of the car, after two or three years of use, the elasticity of the sealing strip of the door begins to decay, there is no previous softness, and the sealing effect is naturally not as good as that of the new car, and some noise outside the car will enter the car. Therefore, we should pay attention to the seals at all times.

The engine is the noise of the car**, and the aging of the soundproof cotton will make the noise not isolated, and the noise will naturally be large. Moreover, the temperature of the engine compartment is generally relatively high, and the soundproof cotton is often at high temperatures, and the aging is naturally fast. However, the noise will be greatly reduced after replacing the sound insulation cotton.

After a period of time, some parts of the car begin to loosen, and when driving, it will resonate because of looseness, which is also one of the most noisy noises, which can be further checked by the maintenance master when doing maintenance.

Cars are driving at high speeds on highways, usually reaching speeds of more than 90 kilometers per hour, when the noise in the car is mainly wind, tire and engine noise.

First of all, the amount of wind noise is related to the shape of the body, which is affected by the design and does not change suddenly. If the driving noise of the car suddenly increases, most of the body is partially deformed, or there is a large damage. In addition to the noise generated by the driving wind in the body, it also produces a loud noise when the air in the cabin is sucked out through various gaps at high speeds.

For example, if you open the windows a little bit, the whistling wind is very loud, and the reason for this kind of driving wind noise is that the cabin is not tightly sealed. If the wind noise of the car is sometimes loud and low, it is best to ask a partner in the car to help check it. The main task is to check the rubber seals around the doors and listen for any air leaks, which requires patience to find out thoroughly.

Reducing wind noise is mainly to solve the tightness of the car, because the body design is difficult to change.

Secondly, the size of the tire noise and speed, load, tire pattern and so on have the most direct impact, 70% of the tire noise of the car comes from the design of its pattern, when the tire noise is large, the tire pressure should be ensured in the appropriate range, the tire is not damaged and excessive wear, and the vehicle is not obviously overloaded. It is a good way to reduce tire noise by checking the tire pressure frequently, replacing the tire in time according to the vehicle maintenance manual, and choosing the right tread tire.

Thirdly, engine noise is related to the design and operation of the engine, the most important of which is the maintenance of the engine. Good lubrication and good working condition parts are the premise to ensure the healthy operation of the engine, and when the engine is in good working condition, its actual noise is the design level of the vehicle.

Finally, when the above three situations can not solve the noise in the car, you can try to do the sound insulation and noise reduction treatment of the whole vehicle, it is worth noting that this treatment must not change the structural safety design of the body, and it is also necessary to choose the sound absorption material with high fire and heat resistance level and light weight.