A muffler assembly

Abstract

The invention discloses a silencer assembly. The silencer assembly comprises a shell, a first bottom plate, a second bottom plate, a first partition plate and an auxiliary plate. The shell is of a cylindrical structure with the two ends opened. The first bottom plate and the second bottom plate are arranged at the two ends of the shell, and a cavity is defined by the first bottom plate, the second bottom plate and the shell. The first partition plate and the auxiliary plate are arranged in the cavity in parallel and divide the cavity. The auxiliary plate is in sliding connection with the inner wall of the shell. A through hole is formed in the first partition plate and internally provided with an elastic membrane. Cutting openings are formed in the elastic membrane. The auxiliary plate is provided with protrusions different in height. The protrusions are provided with ventilation holes penetrating the protrusions and the auxiliary plate, and the protrusions can penetrate the cutting openings to be matched with the through holes. According to the silencer assembly, through the arrangement of the auxiliary plate capable of sliding relative to the shell, the distance between the auxiliary plate and the first partition plate and the number of the ventilation holes can be adjusted, single or comprehensive fine adjustment of noise eliminating or flow resistance is achieved, and when forward design cannot be accurately conducted, a rapid and convenient manner can be adopted for achieving the noise eliminating capability and flow resistance changes of sample pieces.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a muffler assembly. Background technique [0002] The muffler assembly is an important part of the exhaust system of the vehicle, and it is responsible for the engine exhaust emission guide channel and the function of reducing tail noise. Therefore, NVH has higher structural requirements for the muffler. With the complexity of the muffler assembly, the muffler has become a component that contributes the most to the back pressure (ie, exhaust resistance) in the exhaust system of the vehicle, which affects the power and economy of the vehicle. [0003] The structure of the existing muffler assembly is as follows: figure 1 and figure 2 As shown, the existing light truck muffler assembly adopts a similar structure, consisting of the muffler barrel 100, the first bottom plate 200, the second bottom plate 300, the first insertion tube 400, the second insertion tube 500, the third...

AI Technical Summary

Problems solved by technology

The two major performance indicators of the muffler assembly that have a greater impact on the vehicle are the fixed noise and the exhaust back pressure. These two indicators are mutually influencing and opposing indicators. Change the muffler assembly to adjust these two indicators, but in the prior art, the muffler assembly does not have adjustability, which makes it difficult to quickly carry out verification tests

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