Rear-arranged main silencer

Abstract

The invention discloses a rear-arranged main silencer which comprises a cylinder, an air inlet pipe, an air outlet pipe, a front end cover and a rear end cover. A first partition plate and a second partition plate are sequentially arranged on the inner edge of the cylinder in the longitudinal direction of the cylinder and sequentially divide the cylinder into a first cavity, a second cavity and a third cavity. The outlet end of the air inlet pipe extends into the third cavity from the front end cover of the cylinder. The air inlet end of the air outlet pipe is communicated with the second cavity. The portion, located in the second cavity, of the air inlet pipe is provided with an air hole. The second partition plate is provided with an air hole so that the second cavity and the third cavity can be communicated. The first partition plate is provided with a middle pipe so that the second cavity and the first cavity can be communicated. On the premise of not increasing the volume for exhausting and silencing, second-order noise of an exhaust port can be effectively lowered.

Description

technical field [0001] The present invention relates to automobile components, and more particularly to a rear main muffler. Background technique [0002] Exhaust noise is the main noise source of automobile noise. Under the increasingly stringent noise pollution control regulations, the performance of mufflers has attracted more and more attention. The performance of exhaust mufflers directly affects the acoustic quality of automobiles. Due to the limited chassis space for the muffler arrangement in the exhaust system, it is particularly important to design an exhaust muffler that can reduce the second-order noise of the exhaust port under the condition of the limited size of the muffler. [0003] At present, the main method to solve the large second-order noise of the exhaust port is to set a structure similar to a resonant cavity inside the muffler to suppress low-frequency noise. Holes are drilled, and both ends of the tube are opened. By changing the position of the ba...

AI Technical Summary

Problems solved by technology

The muffler is equipped with 3 buffer chambers, although it can increase the noise reduction effect to a certain extent, but it still needs to be strengthened

In addition, the exhaust pipe is U-shaped. Although the length of the exhaust pipe is lengthened and the noise reduction effect is enhanced to a certain extent, the exhaust pipe occupies too much noise reduction volume and needs to be further optimized.

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