What causes noise in the car? What is the cause of the high noise in the car

Top 4 causes of car noise:

1. Engine noise.

At the top of the list is naturally the abnormal engine noise, which is also the most obvious one in the car noise. Engine squeaks are divided into cold car squeaks and hot car squeaks. The abnormal sound of cold car refers to the abnormal sound from the engine compartment when the car is on, and it disappears automatically after the car is warmed.

This abnormal noise is likely to be due to the fact that the car is parked for a long time, and the lubricating oil basically flows back to the oil pan of the engine oil and starts cold.

When the oil pump can not establish the oil pressure in the first time, the oil film is formed between the components, especially the valve inside the cylinder head (upper), which is not lubricated during cold start, whether it is a hydraulic tappet or a mechanical rocker arm, there will be a certain valve clearance or due to the oil pressure is not enough timing chain (with intelligent variable valve or valve lift system) to work normally to cause a clicking sound.

There are many reasons for the abnormal noise of the hot car, excluding its own factors, then when there is abnormal noise, it is not a problem with the parts or the failure of the components, so if you notice that the engine noise is getting louder and louder, you should go to the maintenance shop in time for maintenance.

2. Tire noise.

Tire noise is present in every car, but the difference in sound magnitude is generally due to the air flow between the tire treads. Because tires are rubber products, they are easy to age and harden after a long time, and the noise can be imagined; The elasticity of the new tires is good, and it has better performance in terms of noise and comfort. If the tire noise is too high, you can check whether the tire is aging and if necessary, you can replace it.

3. Wind noise. Wind noise, like tire noise, is present in every car, but there are several types of wind noise, one 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. The faster you travel, the more wind noise will be.

4. Chassis noise.

Generally speaking, chassis noise is due to shock absorbers.

If there is a problem, the car as a whole will make a loud noise when passing through uneven roads. At this time, it is necessary to check the shock absorber of the car well, it is very likely that there will be a serious oil leak.

The treatment method of automobile noise is actually to find the noise, and then treat it according to the noise, such as engine noise and chassis noise, which can be installed with sound insulation cotton.

to lower; Tire noise can be replaced with tires with better quiet performance; Wind noise, on the other hand, is not easy to handle.

Hello! Glad for your question.

Loose chassis generally occurs in older cars, when the car is driving in bad road conditions, the steering wheel will feel unstable, the bottom of the car will also come out of the abnormal sound, usually the old driver can feel the overall a little loose, when encountering such a situation, it means that the chassis may be loose, and the reasons for this situation are divided into several, only by understanding the reasons, can we better prevent this problem from happening.

The first reason is the aging of rubber parts, we all know that the elasticity of rubber is particularly good, which can buffer the friction between parts and reduce noise at the same time. However, this kind of thing has a lifespan, and it will age after a long time, and the elasticity is not as good as before, so the buffering capacity will decrease, resulting in abnormal noise in each part, so it is necessary to check these rubber parts regularly and replace them in time.

The second possibility is the reason for the shock absorber, the main role of this part is to inhibit **, when the car is driving in the dustpan section, it will have an impact with the road surface, and the shock absorber can well ensure the smoothness of the car, if the shock absorber is damaged, there will be a scoop phenomenon, so that the chassis is loose, so usually check the shock absorber, if there is a leakage to repair in time.

The third is the clearance of the parts, that is to say, the ball head may be loose, this part is like the joint of the human body, if the ball head is loose, there will be a large gap between the lever and other connected parts, if the gap is too large, when crossing some dustpan roads, the screws between the subframe and the suspension will be loose, then the chassis will become loose, so usually check these two parts. Thank you.

Many car owners have this feeling, driving, especially when running at high speeds, car noise has become the main factor affecting the driving environment. People who are exposed to noise for a long time will have tinnitus, dreaminess, palpitation and irritability, or directly cause hearing loss or even deafness, among which traffic accidents indirectly caused by vehicle noise are not uncommon. Most people know the causes of noise in the car, but few people know how to deal with it.

Sound-absorbing foam reduces engine noise.

The noise in the car comes from the engine to a large extent, and the noise of the engine increases with the increase of speed, in the sound control of the engine, in addition to artificial, the installation of soundproof cotton can also play a certain role. A high-grade sound-absorbing foam acoustic material is pasted under the hood, which can not only absorb and consume a large amount of engine noise, but also suppress the vibration of the hood, block the heat from the engine, and protect the paint from high temperatures.

Comprehensive sound insulation and tire noise reduction.

Road noise and tire noise are also a major source of noise, as well as a major annoyance for the occupants of the vehicle. Experts say that the use of shock absorbers, sound-absorbing pads and door seals to fully insulate the fenders, floors and doors can effectively improve tire noise and road noise. Some noises are caused by faults in the vehicle itself, such as abnormal tire pressure, irregular wear, suspension or chassis damage, and abnormal engine noise.

Therefore, before doing car sound insulation, you should check the condition of the car first.

Strengthen sealing resistance to wind noise.

Wind noise is caused by the wind pressure exceeding the door sealing resistance when the car is driving at high speeds. The higher the speed, the greater the wind noise. Strengthening sealing resistance is the most direct and fundamental solution, and door seals and inner seals can solve this problem well.

Sound insulation works to reduce system noise.

The sound insulation project of the system is mainly completed through three steps: vibration reduction, noise reduction and sealing. Among them, the doors, trunk, chassis, hood and roof are the most prone to air friction noise, so these places are the focus of sound insulation and noise reduction. It is understood that through professional construction technology, without destroying the original car circuit and changing the original car structure, the sound insulation project can reduce the noise in the car by 4-8 decibels, greatly improving the comfort of driving.

It depends on what is making the noise. If it is the sound of loose parts, decorations, etc., tighten the screws by yourself, and it is OK to get the east and west right. If it's wind noise, tire noise. As well as engine noise, it is recommended to do sound insulation for the whole car, change silent tires, etc.

Cars will have different degrees of noise problems. Interior noise is mainly caused by engine noise. Wind noise. Body resonance. Suspension noise and tire sound.

Noise is usually generated by frictional impact between the tread and the ground, and is transmitted to the car at the same time as vibrations such as fenders and fenders. Then, at this time, it is necessary to install sound insulation materials from the doors, doors, fenders, fenders and other parts to play a role in noise reduction.

Engine noise is the main noise of automobiles**, and many of its internal components are in high-speed motion, which inevitably produces a lot of noise. For example, noise is most noticeable during cold starts, and the friction of the air intake mechanism, belt, and internal metal parts will all produce noise. The main problem of air noise is wind noise, which will compress and divert the vehicle through the air, and such a pressure change will also cause a series of noise problems.

The second is air leakage, which is mainly due to the low pressure effect on the surface of the cab or vehicle gap. Structure-borne noiseMany cars have varying degrees of noise, or even abnormal noise. Generally, this is the noise caused by the resonance of different internal forces caused by the joint of the vehicle structural parts and trim parts.

What do you want to buy an engine and send a car to sound insulation and shock absorber. If it is engine noise, you can add shock absorption, sealing, or see if there is carbon deposit, you can clean it. If it is the noise of the tires, the owner can replace the silent tires and line the wheel arches with soundproof cotton or soundproof panels.

It's a problem with the engine!

What's the deal with loud noise in the car? After listening to the old driver's explanation, I finally knew what to do.

The noise of the car engine is getting louder and louder, and we must pay attention to these three points, otherwise the engine may be scrapped.

First of all, let's talk about the first reason for the high engine noise, that is, usually do not pay attention to maintenance, many car owners after buying a car back, because it is a new car, they do not pay much attention to maintenance, even if it is to maintain, it is also occasional, so the result is that when the car has a problem, then you can't find it at all, until this situation is serious, the car can not be driven, this time it is too late to find out, it is to overhaul. In severe cases, the engine may be scrapped.

The noise of the car engine is getting louder and louder, and we must pay attention to these three points, otherwise the engine may be scrapped.

The second reason for the high noise of the engine is that the soundproof cotton has aged, and everyone knows it. There is soundproofing cotton in the engine compartment of the car, but over time, this soundproofing cotton will show signs of aging, so that the noise is getting louder and louder, if you want to change the situation, you only need to go and replace a soundproofing cotton. The noise of the car engine is getting louder and louder, and we must pay attention to these three points, otherwise the engine may be scrapped.

There is one of the most important reasons, that is, because of too much carbon deposit, we all know that after the car has been driven for a period of time, it will produce carbon deposits, and the more carbon deposits, the louder the noise of the engine, so at this time, the most important thing to do is to clean up the carbon deposits, if you don't want to clean up, you can ask the professionals of the 4S shop to do it.

First of all, let's talk about the first reason for the high engine noise, that is, usually do not pay attention to maintenance, many car owners after buying a car back, because it is a new car, they do not pay much attention to maintenance, even if it is to maintain, it is also occasional, so the result is that when the car has a problem, then you can't find it at all, until this situation is serious, the car can not be driven, this time it is too late to find out, it is to overhaul. In severe cases, the engine may be scrapped.

The main reason is that the sound insulation effect of the car is relatively poor, because in the process of driving, the roar of the engine is transmitted to the car through the metal, and the car is just isolated from the noise through a layer of sound insulation cotton, so the isolation effect is relatively poor, and the noise you hear still exists.

The reason for the noise of the car is because the car noise insulation cotton is not up to standard, tire noise, and the poor sound insulation effect of the engine compartment cover.

Hello friends, the car has noise, it is caused by many aspects, for example, the noise of the engine is relatively loud, and the closed sound of the front door is not good, and the sound of the exhaust pipe is relatively loud and many other factors, if the noise is relatively loud, it means that the performance of the car is not too good, and now some many family cars, especially Japanese cars, basically have no noise, thank you.

Engine noise: carbon deposits, damage to damping parts, aging seals; Causes of tire noise, road and wind noise, chassis noise, etc. If it is caused by engine noise, the carbon deposits should be cleaned up, and the shock absorbing parts and sealing strips should be replaced.

The engine is in a burning state during the driving of the car, and there are many cylinders in the engine, and there will be a beep sound when working at the same time. This sound is transmitted to the outside world through the metal inside the car, which is the reason for the noise.

The reasons for the noise of the car are: the engine noise has carbon deposits, damage to the shock absorbing parts, and aging of the sealing strip; Tire noise aging and hardening; The separation of airflow around the vehicle body causes noise due to pressure changes.

The possible reasons for the noise of the car are: 1. The friction between the tires of the car and the road surface, the worse the road conditions, the greater the tire noise; 2. Noise generated by the rotation of the automobile engine.

There are many reasons why cars are noisy. The main reason is that the car will generate kinetic energy while driving, which will also produce some wind noise and road restlessness.

1. Engine noise 2, tire noise 3, wind noise 4, chassis noise. The treatment method of automobile noise is to find the noise, and then according to the ** to control, the engine noise and chassis noise can be reduced by installing soundproof cotton; Tire noise can replace tires with better silent performance; Wind noise, on the other hand, is not easy to handle.

In the case of noise in the vehicle, it is mainly caused by the noise of mechanical components such as the engine (engine noise), the friction sound between the tires and the ground (road noise), and the collision and friction sound caused by the car breaking through the air curtain (wind noise).

Sounds from the outside environment into the car (e.g., the sound of a large container truck whizzing by.) .

It is composed of internal noise caused by vibration of cockpit interior panels and other components.

Coolant is an indispensable part of the engine of a car, which circulates in the engine cooling system to take away the excess heat energy generated by the engine operation, so that the engine can run normally. However, if the coolant is insufficient, the engine water temperature will be too high and the noise will become louder.