Automobile muffler

Abstract

The invention relates to the technical field of an automobile accessory, in particular to an automobile muffler. The automobile muffler comprises a bag body, an air inlet pipe, an exhaust pipe, an air return pipe, a first separation plate and a second separation plate, wherein the air inlet pipe, the exhaust pipe, the air return pipe, the first separation plate and the second separation plate are arranged in the bag body. The automobile muffler is characterized in that the bag body is separated into a first volume expanding cavity, a resonance cavity and a second volume expanding cavity through the first separation plate and the second separation plate, the air inlet pipe, the exhaust pipe and the air return pipe are arranged in the bag body in a way of being vertical to the separation plate, one end of the air inlet pipe is communicated with the outside of the bag body, the other end of the air inlet pipe extends into the first volume expanding cavity, a perforating cone body is arranged at the end part, ventilation holes are uniformly distributed in the pipe wall of the pipe section of the resonance cavity, one end of the air return pipe extends into the second volume extending cavity, the other end of the air return pipe extends into the first volume extending cavity, one end of the exhaust pipe extends into the second volume expanding cavity, and the other end of the exhaust pipe passes through the bag body to be communicated with the bag body. The automobile muffler has the beneficial effects that the automobile tail gas airflow reverse-phase opposite impact can be realized, and the formation of automobile exhaust noise and secondary noise can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to an auto muffler. Background technique [0002] In the prior art, an impedance compound muffler is usually used. The muffler of this structure and principle still has the following defects: [0003] One is that the sound-absorbing material of the composite muffler has poor durability to exhaust dust and water. At the same time, the sound-absorbing material reduces the corrosion resistance of the package body after absorbing water; Exhaust gas from automobiles is discharged into the air, seriously endangering the environment and detrimental to human health. [0004] The second is that due to the structural design of the car muffler body, the car muffler produces secondary noise while muffled. This is mainly caused by the high exhaust air velocity of the automobile. Reducing the exhaust air velocity of the automobile is the solution One of the measures for the secondary noise ...

AI Technical Summary

Problems solved by technology

[0005] The third is that in the prior art, the broken catalyst in the three-way purification device at the exhaust outlet of the engine causes the fragments to extend into the muffler package behind, blocking the small hole in the exhaust pipe of the muffler, and causing the package to heat up after the engine is started. Turning red will affect the safety of the fuel tank next to the muffler body. In severe cases, the muffler body will explode, which is a serious threat to the safety of the car body and the passengers.

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