How to do sound insulation when the car is noisy, and how to do sound insulation when the car is noi

Hello, about this kind of problem, for the middle and high-end cars, the original sound insulation project has been done, in fact, if you add sound insulation, the subjective significance is not great, although the noise meter value has changed.

For low-end entry-level cars, the installation of sound insulation will have a great subjective improvement, because many low-end cars are limited by cost and will not pay special attention to sound insulation.

Generally, in order to isolate different noises, the following parts need to be insulated:

Tire noise: chassis, fenders, cab floor, four doors, trunk floor, replacement of silent tires.

Wind noise: Generally, there is no good way, you can add air guide grooves in the appropriate parts to affect the direction of air flow.

Engine noise: firewall, bin cover, bin cover, bin cover, I hope to help you, hope!

If your family lives on the side of the road, you are susceptible to car noise. How to do a good job of sound insulation when the car is noisy? PChouse will take you to find out.

1. The engine is installed with sound insulation materials. If the noise of the car is caused by the engine, the engine noise can be absorbed by installing sound insulation materials around the engine to reduce noise transmission.

2. Replace tires with low noise. The noise generated by tires is also different, if the noise of the car is caused by tires, you can replace the tires with low noise, and you can also insulate the fenders.

3. Install soundproof cotton. If the sealing of the car is not particularly good, the effect of sound insulation can not be achieved with sealing strips, and the noise can be blocked by adding sound insulation cotton to the car. In particular, the effect of installing soundproof cotton to remove noise and wild sound is the best.

4. Replace the door seal. If the car's sealing strip loses its original effect, Kesong Beard can replace the door sealing strip to make the car have a better sound insulation effect.

If the engine is very noisy and you want to insulate the sound, you can install soundproof cotton on the engine cover, which can effectively isolate most of the noise. It is also possible to install soundproof cotton inside the door, which can also isolate some noise.

There are many reasons why the engine is noisy, and the engine of some cars is very noisy when it leaves the factory.

Most noisy engines are in-cylinder direct injection engines, and many in-cylinder direct injection engines make a clicking sound when running. In fact, this is normal, it is the sound of the high-pressure oil pump working.

The in-cylinder direct injection engine must be equipped with a high-pressure oil pump, otherwise the injector injection pressure is not enough.

Direct injection engines require high injection pressures, which is the only way to atomize the gasoline more thoroughly.

The high-pressure oil pump is in the engine compartment, and the high-pressure oil pump for most in-cylinder direct injection engines is near the engine cylinder head.

Some cars make a very loud sound when the Gaosun leather oil pump is working, such as BMW N20 series engine, Honda L15 series engine.

The noise of the high-pressure oil pump when working cannot be solved. If you're very worried about this noise, you can opt for a model with a direct-injection engine.

The engine of some cars has become very noisy because of failure, and you should go to the 4S shop immediately to check and repair it when you encounter this situation.

Millions of car purchase subsidies.

The most effective way to do sound insulation is to dampen and dampen vibration, that is, to increase the elastic anion material on the propagation path to isolate or attenuate the propagation of vibration, and the purpose of vibration reduction and noise reduction can be achieved.

The effect of soundproofing the whole car is good, the car noise is large, and the car noise is divided into two categories:

One is the noise generated by friction during vehicle driving, such as wind noise and road noise;

The second is the noise generated by structural vibration. The noise perceived during driving needs to be transmitted through a certain medium – air, a solid that is physically connected to the noise source. The details are as follows:

The whole car needs to be equipped with a sealing strip for the whole car to be soundproofed. In addition to high-end cars, the whole car sealing strip of general automobile manufacturers is a cost-saving product, of which recycled rubber is a large part, and a large proportion of the sealing strip is recycled rubber. Therefore, to insulate the whole car sound, it is necessary to plug the sealing strip with better quality on the inner wall of the automobile sealing strip.

The method of arranging the soundproof sealing strip for the whole car is as follows: the sealing strip is fixed around the door, the sealing strip is fixed on the skeleton around the door opening, and the sealing strip is installed on both sides around the door, around the door and around the door opening, so that the car is double-installed.

Extended information: The installation of sealing strips throughout the car improves the sealing of the whole vehicle. It can be made into a variety of complex cross-sectional shapes according to the different parts of use.

In order to strengthen the effect of the seal. In luxury cars, it is common to install 3 or 4 seals, and install a quadruple seal structure for the front pillar and roof side cross member.

This kind of multi-layer sealing is generally arranged in the front door gap, in addition to the sealing function, but also the role of car sound insulation and noise reduction. The purpose of our installation is to achieve three to four seals, so as to achieve the effect.

Photo by Pacific Automobile Network Q&A).