Multicavity resonance muffler

A muffler and resonance cavity technology, which is applied in mufflers, machines/engines, engine components, etc., to improve NVH, avoid resonance mutual interference, and improve the noise reduction effect of the overall structure of the noise.

Inactive Publication Date: 2015-10-21
BRILLIANCE AUTO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the technical problem that the existing supercharged engine muffler cannot further reduce the high-frequency noise generated during low-speed transient acceleration. It effectively

Method used

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  • Multicavity resonance muffler
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Embodiment Construction

[0012] In order to make the present invention easy to understand, according to figure 1 with figure 2 Describe concrete structure of the present invention in detail, embodiment: as figure 1 with 2 As shown, a multi-cavity resonance muffler includes a cylinder body 2 with an airflow outlet 1, an airflow inlet 3 and a ventilation cavity 9. The cylinder body is a conical cylinder with an airflow outlet diameter smaller than the airflow inlet diameter, and a circle is formed in the cylinder body. The platform-shaped ventilation cavity 9 has a trapezoidal overall axial section, and the cylinder wall has a double-layer structure with an inner cylinder wall 4 and an outer cylinder wall 5, and a cavity interlayer is spaced between the inner cylinder wall and the outer cylinder wall , the angle between the inner cylinder wall 4 and the axis of the cylinder wall double-layer structure is smaller than the angle between the outer cylinder wall 5 and the axis, and a plurality of annular...

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Abstract

The invention provides a multicavity resonance muffler which solves the technical problem that a superchargerof the conventional supercharged engine produces high-frequency noise during low-speed instant acceleration. The multicavity resonance muffler is characterized in that a barrel is a conical barrel of which the diameter of an air flow outlet is less than that of an air flow inlet; a circular table-shaped inner cavity is formed in the barrel; a barrel wall is ofa two-layer structure with a cavity interlayer spaced; a plurality of annular radial partition plates are arranged in the interlayer; the cavity interlayer is divided into a plurality of annular cavities distributed along the axial direction by the radial partition plates; and strip-type muffle holes of different widths are formed in an inner layer barrel wall, and are formed in a staggered manner along the circumferential direction of the inner layer barrel wall. Mutual interferencecaused by the resonance of the strip-type muffle holes of the various resonant cavities are avoided; in addition, the resonant cavity volumes of various sections ofresonant and mufflingcavitiesare changed with the design of the outer wall of the conical barrel; the specific noise elimination bandwidth of each resonant cavity is regulated effectively; the noise reduction effect of the overall structure is improved; and the NVH (Noise Vibration and Harshness) of a finished automobile is improved effectively.

Description

technical field [0001] The invention relates to a noise reduction structure for an internal combustion engine, in particular to a multi-cavity resonance muffler for an automobile engine supercharger. Background technique [0002] At present, with the popularization of family cars, consumers no longer only stay at the level of excellent performance, reliability and durability for family cars, and the requirements for vehicle NVH (abbreviation for noise, vibration and harshness) have been raised to the design assessment requirements of various car manufacturers Above all, the engine, as the power core of the vehicle, not only provides power for the vehicle, but also becomes the main source of noise for the vehicle. Among them, when the supercharged engine accelerates at low speed instantaneously, high-frequency noise is generated because the working point of the supercharger is close to the critical surge area. Due to its generation mechanism, it cannot be avoided, so it needs...

Claims

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Application Information

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IPC IPC(8): F01N1/02F01N1/08
Inventor 于贵芙毕野黄昌瑞李振华卜艳亮王博洋李帅
Owner BRILLIANCE AUTO
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