Gasoline engine exhaust silencer composed of porous pipes

Abstract

The invention provides a gasoline engine exhaust silencer composed of porous pipes. The gasoline engine exhaust silencer comprises a front end cover, an outer barrel body, a tail cover and a tail pipewhich are connected in sequence. The gasoline engine exhaust silencer further comprises a silencing assembly arranged inside the outer barrel body. The silencing assembly comprises the first porous pipe, the second porous pipe and the glass fiber supporting porous pipe. The pipe wall of the first porous pipe is provided with a plurality of first silencing holes, and the first porous pipe is arranged in the second porous pipe. The pipe wall of the second porous pipe is provided with a plurality of second silencing holes. The pipe wall of the glass fiber supporting porous pipe is provided witha plurality of first sound absorption holes. A glass fiber layer is arranged between the glass fiber supporting porous pipe and the outer barrel body. A glass fiber layer is arranged inside the tail cover. The end face, facing towards the interior of the outer barrel body, of the tail cover is provided with a plurality of second sound absorption holes. The silencing effect and silencing performance are good so as to reduce noise pollution caused by operation of a gasoline engine, and the gasoline engine is large in largest power, high in highest speed and small in power loss.

Description

technical field [0001] The present invention relates to a mechanical muffler, more specifically, to a gasoline engine exhaust muffler composed of porous pipes. Background technique [0002] When the exhaust gas is discharged from the automobile engine, the pressure of the exhaust gas changes rapidly at the outlet of the exhaust pipe, which generates vibration, and the vibration generates noise. In the prior art, a muffler is installed in the exhaust pipe of the automobile engine, and the muffler is used to consume airflow energy and reduce the pressure fluctuation range of the airflow, which can reduce noise. The muffler is a device for reducing airflow noise. It is installed in the pipeline or on the inlet and exhaust ports. It has a certain effect on noise reduction when the airflow passes through. Its performance mainly includes three aspects: [0003] 1. Noise reduction performance, including the size and frequency spectrum characteristics of noise reduction; [0004] ...

AI Technical Summary

Problems solved by technology

However, although the existing muffler has a certain noise reduction effect, the noise elimination effect provided with the noise reduction cavity structure is not obvious and not ideal; large power loss

At the same time, it also has the disadvantage of insufficient gasoline combustion of the engine at low speed, which greatly affects the output performance and service life of the engine.

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