Automobile exhaust manifold silencer

Abstract

The invention discloses an automobile exhaust manifold silencer which comprises a main body, an air inlet pipe and an end cover. A silencer core body is fixed in the main body, and both ends of the silencer core body run through the end part of the main body and the middle part of the end cover. An annular groove is arranged in the open end face of the main body. An extension part which matches the annular groove is arranged in the middle part of the seal end of the end cover. An inclined face A is arranged at the upper part of the seal end face of the end cover. An inclined face B which shares the same inclination direction with the inclined face A is arranged on the end face of the main body. The inclined face A, the outer wall of the extension part and the inclined face B form an annular filling groove. The end part of the silencer core body is in butt joint with an intake pipe. A helical diversion trench is arranged in the inner wall of the intake pipe in the direction, which points to the main body, of the axis. On the seal end face of the end cover, an L-shaped contact face is formed on the outer wall between the extension end and a projection. Through a metal adhesive in the filling groove, the outer wall is completely separated from the inside of the main body to ensure that the airtightness of the silencer.

Description

technical field [0001] The invention relates to a muffler, in particular to an automobile exhaust manifold muffler. Background technique [0002] Traffic noise is the pollution source with the strongest radiation and the widest influence in the urban environment. In the noise of motor vehicles, exhaust noise is one of the main noise sources. Its reduction is mainly through the installation of exhaust mufflers. After the muffler is installed, it will inevitably have a great impact on the engine; the power loss of the general muffler is 3% to 8%. Larger power loss is allowed when the muffler is larger; lower power loss is required for the muffler matching the low-power engine. [0003] The number of automobiles in our country is increasing, and people's requirements for automobiles are no longer just means of transportation, but also energy-saving, environmental protection, aesthetics and comfort. Traffic noise from motor vehicles is the main source of noise on urban roads, ...

AI Technical Summary

Problems solved by technology

However, in the production and processing of general mufflers, the resistive mufflers and resistive mufflers mainly used on the market can only deal with high-frequency or low-frequency noise separately, and the scope of application is not wide. In terms of: in high temperature, water vapor and gas that is corrosive to sound-absorbing materials, the service life of the muffler is short, and the effect on low-frequency noise is poor; the biggest disadvantage is that the power loss of the muffler is too large

Moreover, oil and grease residues will appear in the muffler tube, which will reduce the noise reduction function of the muffler core. The existing muffler tubes are formed by welding steel plates, and the muffler cores are fixed in the tube. Under the premise of destroying the cylinder, take out the sound-absorbing core for cleaning

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