When washing the car, you want the exhaust pipe to look good. Generally speaking, it can be washed with water. But be careful not to rush directly to the nozzle. Whether an exhaust system can be washed with water, you must know that the exhaust pipe is a part of the engine, so try to avoid it when washing the exhaust system. There is an energy-saving muffler in the exhaust pipe to reduce noise. The muffler is a metal box. The outside part can be cleaned at will, and there will be no problem. But the muffler is filled with silencing cotton, which is very easy to fall off after being soaked in a lot of water. In case the silencing cotton is dropped, it will block the exhaust passage, which is much more practical than stuffing any cleaning balls. Finally, it can be washed outside the nozzle, but not directly at the nozzle. If a large amount of water enters the exhaust pipe by mistake, it is best to go to the owner's cooperative car service shop to clean and dry it in time.
The noise of automobile exhaust pipe is the main component of driving noise, and all countries in the world have strict regulations on the noise limit of various vehicles. The muffler of automobile exhaust pipe is a device to reduce the exhaust noise, so as to reduce the exhaust noise of the engine and make the high-temperature exhaust gas safely and effectively discharged. As a part of the exhaust pipe, the muffler of automobile exhaust pipe should ensure its smooth exhaust, low resistance and sufficient strength. The existing muffler of automobile exhaust pipe has complex structure and limited noise elimination ability. Therefore, it is necessary to provide an automobile exhaust muffler to solve the above problems. In addition, in the prior art, for example, China patent CN 1037 10873 A discloses "a non-woven sound-absorbing cotton containing graphene", which consists of a top layer, a back layer and a fiber cotton layer sandwiched between the top layer and the back layer, and the top layer and the back layer are made of non-woven materials. Non-woven fabric is made of the following raw materials: isotactic polypropylene 100, vinyl acetate 5-7, 2- hydroxypropyl acrylate 2-3, isocyanate 1-2, silica 4-5, sodium tripolyphosphate 2-3, epoxidized soybean oil12-1. The composition of silent cotton with this structure is too complicated, the preparation process is complicated, and the practical application value is low.