Broadband noise reduction muffler

A muffler, broadband technology, applied in mufflers, machines/engines, engine components, etc., can solve the problems of ignoring airflow direction and pressure loss, and unable to cover broadband noise.

Active Publication Date: 2017-03-01
无锡红湖消声器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing impedance composite mufflers often improve performance by simply adjusting the number of baffles, inner tubes and resistive elements, without making any adjustments to the volume of the chamber, the diameter and number of perforations, the type of sound-absorbing material and its physical characteristics ( Thickne

Method used

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Embodiment Construction

[0025] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0026] See Figure 1 to 4 In a preferred embodiment of the present invention, a broadband muffler provided by the present invention includes a housing 1, a baffle and a chamber arranged in the housing 1, and the chamber is a special-shaped structure. The baffle includes a first baffle 2, a second baffle 3, and a third baffle 4 arranged in sequence, and the chamber includes a first baffle 2, a second baffle 3, and a third baffle 4 sequentially separated by A chamber 5, a second chamber 6, a third chamber 7 and a fourth chamber 8. The chamber is provided with an air inlet pipe 9 penetrating the front end surface of the housing 1, the first baffle 2 and the second baffle 3, the first baffle 2, the second baffle 3...

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Abstract

The invention belongs to the technical field of motor vehicle exhaust systems, and particularly relates to a broadband noise reduction muffler. The broadband noise reduction muffler comprises a shell, baffles and cavities, wherein the baffles and the cavities are arranged inside the shell, the baffles include the first baffle, the second baffle and the third baffle which are arranged in sequence, the cavities include the first cavity, the second cavity, the third cavity and the fourth cavity, an air inlet pipe penetrating through the front end face of the shell, the first baffle and the second baffle and an air outlet pipe penetrating through the first baffle, the second baffle, the third baffle and the rear end face of the shell are arranged inside the cavities. The first baffle, the second baffle and the third baffle are provided with a first punching region, a second punching region and a third punching region respectively. The pipe walls, on the first cavity and the second cavity, of the air inlet pipe are provided with a fourth punching region and a fifth punching region respectively. The fourth punching region is sleeved with a first sleeve. The pipe wall, on the second cavity, of the air outlet pipe is provided with a sixth punching region. The sixth punching region is sleeved with a second sleeve. The first sleeve, the second sleeve and the fourth cavity are each internally provided with a sound absorbing material.

Description

Technical field [0001] The invention belongs to the technical field of motor vehicle exhaust systems, and particularly relates to a broadband noise reduction muffler. Background technique [0002] With the development of transportation, the problem of automobile noise pollution has become increasingly prominent, and it has become the most important source of noise pollution in the world today. Among them, exhaust noise is one of the most important noise sources in automobile noise, and the performance of exhaust mufflers directly affects the acoustic quality of automobiles. In the field of automotive mufflers, there are currently three types of commonly used mufflers, namely, resistive mufflers, resistive mufflers and impedance composite mufflers. [0003] The resistive muffler is an absorbing muffler, which uses the sound wave to propagate in the porous sound-absorbing material, and the sound energy is converted into heat energy and dissipated due to friction, so as to achieve th...

Claims

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Application Information

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IPC IPC(8): F01N1/00F01N13/20
CPCF01N1/00F01N13/20F01N2210/00
Inventor 李烨锋姜夏冰
Owner 无锡红湖消声器有限公司
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