Automobile muffler

Abstract

The invention discloses an automobile muffler which comprises a casing, an air inlet pipe, an air outlet pipe and a primary resonance tube and further comprises at least three baffle plates and at least one secondary resonance tube; the outer edges of the baffle plates are hermetically connected with the inner wall of the casing and divide the interior of the casing into a front cavity, middle cavities and a rear cavity; a first through hole is formed in the pipe body of the air inlet pipe positioned in one middle cavity; the primary resonance tube is communicated with the front cavities and the rear cavities; and one end of the secondary resonance tube is positioned in one front cavity, passes through at least one middle cavity and extends to the next middle cavity. According to the invention, the interior of the muffler is divided into the front cavity, the plurality of middle cavities and the rear cavity, which are independent from one another, by the baffle plates; air enters the rear cavity from one port of the air inlet pipe, exchanges continuously at the first through hole in the pipe body of the air inlet pipe, then flows to the front cavity through the primary resonance tube and the secondary resonance tube, and is discharged from the muffler through the air outlet pipe; and meanwhile, air interferes in the cavities, so that noise of all frequencies is eliminated.

Description

technical field [0001] The invention relates to a vehicle muffler, in particular to a structure of an automobile engine exhaust muffler. Background technique [0002] Automobile mufflers are commonly used components of automobiles, which are used to reduce the noise generated by the engine, reduce vibration, and improve the comfort of automobile use. The commonly used car muffler structure achieves the purpose of muffler through a long tubular exhaust pipe coiled in the shell, but because the exhaust pipe is a long round pipe, it cannot be bent excessively to prevent rupture, and an elbow must be used at the bend Welding is not only complicated in design and extremely inconvenient in processing, but also this structure can easily lead to blocked airflow and affect the noise reduction effect of the muffler. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a vehicle muffler with simple structure, smooth air flow an...

AI Technical Summary

Problems solved by technology

The commonly used car muffler structure achieves the purpose of muffler through a long tubular exhaust pipe coiled in the shell, but because the exhaust pipe is a long round pipe, it cannot be bent excessively to prevent rupture, and an elbow must be used at the bend Welding, not only the design is complicated, the processing is extremely inconvenient, but also this structure is easy to cause the airflow to be blocked, which will affect the noise reduction effect of the muffler

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