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Common faults of car mufflers

(Summary description)The car muffler is generally used to reduce the noise caused by the engine of the motor vehicle. The principle is that the car exhaust pipe is composed of two pipes with different lengths.

Common faults of car mufflers

(Summary description)The car muffler is generally used to reduce the noise caused by the engine of the motor vehicle. The principle is that the car exhaust pipe is composed of two pipes with different lengths.

Information

The car muffler is generally used to reduce the noise caused by the engine of the motor vehicle. The principle is that the car exhaust pipe is composed of two pipes with different lengths. The difference in length is equal to half of the wavelength of the sound wave emitted by the car, so that the interference of the two columns of sound waves when they are superimposed will cancel each other out and reduce the sound intensity, so that the transmitted sound will be reduced, then it will have the effect of silencing.
A car muffler is a special device that blocks sound transmission and allows airflow to pass through, preventing airflow dynamic noise. At present, in order to suppress the environmental noise caused by the discharge of high-pressure airflow, there are many types of mufflers in the world, and most of them adopt the principle of impedance composite muffler. However, due to the complex structure, heavy weight, high-temperature oxidation sound-absorbing filler, high-speed airflow impact sound-absorbing filler, water vapor permeation sound-absorbing filler and other reasons, the muffler has been frequently repaired, the noise reduction effect is poor, and the service cycle is short main problems facing the device.

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