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Method for reducing noise of exhaust manifold

An exhaust manifold and modal analysis technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as large noise, and achieve the effects of reducing noise, improving noise, and solving large noise

Inactive Publication Date: 2015-07-22
CHENGDU LINGCHUAN SPECIAL IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a noise reduction method for an exhaust manifold, which solves the technical problem that the existing exhaust manifold has relatively high noise during use, and realizes the reduction of the noise of the exhaust manifold during use. technical effect

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  • Method for reducing noise of exhaust manifold

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Embodiment 1

[0028] In Embodiment 1, a noise reduction method for an exhaust manifold is provided, please refer to figure 1 , the method includes:

[0029] First, obtain exhaust manifold information data;

[0030] Then, an exhaust manifold model is established based on the information data;

[0031] Then, carry out modal analysis to described exhaust manifold model, obtain modal analysis result;

[0032] Then, based on the modal analysis results, modal optimization is performed on the exhaust manifold.

[0033] Wherein, in the embodiment of the present application, the information data includes: the mass, mass distribution, connection relationship, and elastic modulus of each part of the exhaust manifold.

[0034] Among them, in the embodiment of the present application, the parameters that need to be paid attention to in the modal analysis modeling are the mass distribution of each component and the elastic modulus of the material. The mass distribution is ensured through detailed mes...

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Abstract

The invention discloses a method for reducing noise of an exhaust manifold. The method includes the steps of obtaining information data of the exhaust manifold; building an exhaust manifold model based on the information data; carrying out modal analysis on the exhaust manifold model to obtain the modal analysis result; carrying modal optimization on the exhaust manifold based on the modal analysis result. The method has the advantage that the noise of the exhaust manifold in the use process is reduced.

Description

technical field [0001] The invention relates to the field of exhaust manifold research and design, in particular to an exhaust manifold noise reduction method. Background technique [0002] The engine exhaust manifold subsystem is a key system for receiving high-temperature and high-pressure combustion exhaust gas and catalytic conversion of harmful gases to control emissions. The system is connected to the cylinder head through the exhaust manifold bolts, and is directly excited by the structural vibration of the engine. If the stiffness design is not reasonable, it will easily resonate with the main order of the engine. At the same time, the system is suspended on the vehicle body through a hook, which is also easy to transmit vibration to the body, causing the vibration of the body, which in turn causes the roar of the cab. In addition, the exhaust manifold cover and the catalytic converter heat shield are typical casing parts on the engine, with thin walls, flat surface...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 汪庭文黄柳志杨军
Owner CHENGDU LINGCHUAN SPECIAL IND