Air intake muffler for turbocharged engine

Abstract

The invention relates to an intake muffler for a turbocharged engine, which includes an air intake pipe, an air outlet pipe and a casing, the casing has an input wall and an output wall, and the casing is provided with a first partition, a second partition, a third partition, The right chamber, the first chamber, the second chamber, the third chamber and the fourth chamber defined by the fourth partition, the input wall and the output wall; the output end of the air inlet pipe is located in the first chamber, and the air outlet pipe The input end of the input is located in the right chamber; the third chamber is located below the first chamber, the fourth chamber is located below the second chamber, the third chamber and the fourth chamber are filled with sound-absorbing materials, and the third chamber is located below the second chamber. The bottom of the chamber is provided with drainage holes communicating with the outside of the casing; second through holes are evenly distributed on the first partition, the second partition, the third partition and the fourth partition. The invention has the advantages of compact structure, small volume, low cost and wide noise reduction frequency band; at the same time, it effectively avoids the vibration and radiation noise caused by gas impacting the casing.

Description

technical field [0001] The invention relates to a muffler, in particular to an intake muffler for a turbocharged engine. Background technique [0002] With the development of the automobile industry, people have higher and higher requirements on the power, economy and comfort of automobiles. In order to improve the performance of the engine and reduce the noise of the intake system, not only the inherent parameters of the intake muffler itself must be considered in the design process of the vehicle intake muffler, but also the layout position and structure of the intake muffler must be rationally optimized. [0003] In addition to filtering the air, the air filter is also a kind of intake muffler. At present, the air filters used in cars all adopt the design method of three-stage connection. However, the methods for reducing engine intake noise are limited to increasing the volume of the air filter housing, lengthening the intake pipe, and increasing the Holm Hertz resonan...

AI Technical Summary

Problems solved by technology

However, the methods of reducing engine intake noise are limited to increasing the volume of the air filter housing, lengthening the intake pipe, increasing the Holm Hertz resonance cavity, etc.

Although these methods can effectively reduce intake noise, they will take up a lot of space in the engine compartment

However, the space in the engine compartment is often very limited, and it is difficult to arrange various large-capacity noise reduction components in an extremely limited space.

The use of braided tubes can reduce noise without increasing the occupied space, but because of the high cost of braided tubes, many car manufacturers are discouraged from using braided tubes

Therefore, the current methods for reducing the intake noise of the engine all have the problems that the noise reduction and the cabin space cannot be balanced and the cost is high

At the same time, except for the braided tube, the current noise reduction technology has a very limited noise reduction frequency band, especially for some medium and high frequency noise, which can be said to be completely powerless

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