汽油机燃烧噪声的多元回归分析

王志强; 吴坚; 魏超; 高文志; 何王波; 武聪山

doi:10.13433/j.cnki.1003-8728.2017.0820

汽油机燃烧噪声的多元回归分析

doi: 10.13433/j.cnki.1003-8728.2017.0820

1.
天津大学内燃机燃烧学国家重点实验室, 天津 300072;
2.
广州汽车集团股份有限公司汽车工程研究院, 广州 511434

基金项目:

广东省省级科技计划项目（2013B090400002）资助

详细信息

作者简介:
王志强(1991-),硕士研究生,研究方向为汽车发动机NVH,hdgs29@163.com

通讯作者:
高文志(联系人),教授,博士,gaowenzhi@tju.edu.cn

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- 文章访问数: 252
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- 被引次数: 0
出版历程
- 收稿日期: 2016-04-15
- 刊出日期: 2017-08-05

Multiple Regression Analysis of Gasoline Engine Combustion Noise

1.
State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China;
2.
Guangzhou Automobile Group Co., LTD., Automotive Engineering Institute, Guangzhou 511434, China

摘要

摘要: 为了更合理地评估发动机燃烧噪声，将燃烧噪声按传递路径不同分为直接燃烧噪声和间接燃烧噪声。基于两种燃烧噪声的传递函数不随发动机工况变化而变化，在每个频率下建立缸压、缸压引起的转矩力与燃烧噪声之间多元回归模型并求解回归系数，得到相应频率下的直接燃烧噪声和间接燃烧的传递系数。对25 Hz~20 000 Hz频率范围内两种燃烧噪声传递函数进行了计算和分析，结果表明：在各个中心频率下的多元回归模型拟合度较高，说明应用此方法获取的直接和间接燃烧噪声传递系数比较准确；直接燃烧噪声和间接燃烧噪声的传递函数在2 000 Hz左右频率段均存在峰值；该汽油机在25 Hz~1 250 Hz频率范围内，间接燃烧噪声高于直接燃烧噪声，在1 250 Hz~20 000 Hz频率范围内，直接燃烧噪声高于间接燃烧噪声。
- 汽油机 /
- 多元回归分析 /
- 燃烧噪声 /
- 传递函数
Abstract: The objective of this paper is to make a reasonable estimation on the combustion noise of internal combustion engine. According to the different transmission paths, the combustion noise can be divided into direct combustion noise and indirect combustion noise. Based on the fact that two kinds of combustion noise transfer function are not changing with engine working conditions, the multiple regression model of the cylinder pressure, the torque force caused by cylinder pressure and the combustion noise is built to solve the regression coefficients at each frequency. Then both the direct and indirect combustion noise transfer coefficients can be gotten at each corresponding frequency. The transfer functions of the two components of combustion noise between 20 Hz to 20 000 Hz are calculated and analyzed. The results show that the multiple regression model fitting degree is high at each frequency, so the direct and indirect combustion noise transfer functions obtained by this method are relatively accurate. The transfer functions of both the direct and indirect combustion noise exist peak at about 2 000 Hz. For this gasoline engine,the indirect combustion noise is higher than direct combustion noise between 25 Hz to 1 250 Hz; otherwise, the direct combustion noise is higher than indirect combustion noise between 1 250 Hz to 20 000 Hz.
- internal combustion engine /
- multiple regression analysis /
- combustion noise /
- transfer function

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参考文献(17)

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