sub3
sub2
sub1

Classification of car mufflers, how many types of car mufflers

2018-11-16

Automobile mufflers can be divided into three types: resistive muffler, resistive muffler and impedance compound muffler according to the principle and structure of muffler

1. Resistant muffler Resistant muffler is when various mufflers such as expansion chamber and resonance chamber are composed of pipes, baffles and other components inside, the sound wave will be reflected and interfered during propagation, and the sound energy will be reduced to achieve the purpose of muffler. Resistant mufflers have a limited noise reduction frequency band, usually have good noise reduction effects on low and medium frequency bands, and have poor high frequency noise reduction effects. Most trucks use resistant mufflers.

2. Resistive muffler E is a muffler that fills sound-absorbing material around the pipe through which the internal exhaust passes to absorb sound energy to achieve the purpose of muffler. It has a good noise reduction effect on medium and high frequency, and it is rarely used as an automobile exhaust muffler, and it is usually used in combination with a resistant muffler. -

3. Impedance Composite Muffler It is a muffler composed of resistive muffler units and sound-absorbing materials, and it has the common characteristics of resistive and resistive mufflers. It has a good noise reduction effect on low, medium and high frequency noise.

main effect

Reduce the exhaust noise of the engine and enable the high-temperature exhaust gas to be discharged safely and effectively. As a part of the exhaust pipe, the muffler should ensure smooth exhaust, low resistance and sufficient strength. The muffler must withstand high-temperature exhaust at 500°C~700°C to ensure that it will not be damaged or lose its muffler effect within the specified mileage of the car.

Related application

Car noise mainly comes from car exhaust noise. If no muffler is added, the noise can reach more than 100 decibels at a certain speed. The second is engine noise and tire noise. Engine noise can reach more than 90 decibels when the car is running normally, while tire noise can reach about 95 decibels when the vehicle speed is above 90 km/h. Therefore, adding a muffler to the exhaust system can reduce the exhaust noise of the car by 20-30 decibels. In terms of engines, replacing diesel engines with gasoline engines can reduce engine noise by 6-8 decibels.