汽油机燃烧压力与燃烧噪声分析

翟俊萌; 吴坚; 边强; 张志强; 高文志

doi:10.13433/j.cnki.1003-8728.2015.1224

汽油机燃烧压力与燃烧噪声分析

doi: 10.13433/j.cnki.1003-8728.2015.1224

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 510640

基金项目:

国家863计划项目(2009AA045103)资助

详细信息

作者简介:
翟俊萌(1988-),硕士研究生,研究方向为内燃机振动噪声控制,zjm_june@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: 187
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- 被引次数: 0
出版历程
- 收稿日期: 2013-08-20
- 刊出日期: 2015-12-05

Analysis on Combustion Pressure and Combustion Noise of Gasoline Engine

1.
State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China;
2.
Guangzhou Automobile Group Co., Ltd., Automotive Engineering Institute, Guangzhou 510640, China

摘要

摘要: 为了深入研究汽油机的燃烧噪声产生的机理,达到在发动机设计阶段实现对燃烧噪声预测目的,提出根据汽油机的气缸压力与压缩压力计算燃烧压力与燃烧噪声的方法。采用FFT方法对缸内压力、压缩压力、燃烧压力以及气体共振激励力进行了频谱特性分析,确定了各频带范围内燃烧噪声的贡献量。理论分析结果表明:在小于1 000 Hz的频率下,压缩压力引起的噪声占主要地位,在1 000~10 000 Hz的频率段,燃烧噪声占主导,而在大于15 000 Hz的频率范围内,气体共振激励力引起的噪声较大。在中频段汽油机的转速对燃烧噪声的影响较大。
- 汽油机 /
- 燃烧压力 /
- 燃烧噪声 /
- 频谱分析
Abstract: In order to research the generation mechanism of gasoline engine's combustion noise, and achieve the goal to predict the combustion noise in the engine design phase, a method of combustion pressure calculation based on the gasoline engine's in-cylinder pressure and compression pressure is proposed. The time and frequency spectrum analysis about in-cylinder pressure、compression pressure、combustion pressure and gas resonance excitation are studied with Fast Fourier Transform (FFT) technology, and then the contribution of combustion noise in each frequency band range is confirmed. The theoretical analysis results show that the low frequency (15 kHz) is a consequence of the acoustic noise caused by gas resonance in cylinder. The gasoline engine's rotating speed has a strong influence on combustion noise in middle frequency bands.
- acoustic noise /
- calculations /
- combustion /
- cutoff frequency

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参考文献(17)

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