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论文类型：期刊论文

发表时间：2022-06-29

发表刊物：内燃机学报

所属单位：能源与动力学院

卷号：27

期号：4

页面范围：359-362

ISSN号：1000-0909

摘要：The components of diesel noise overlap with each other, so the time
   window and spectral analysis are not very effective in extracting
   combustion noise. The method of time frequency filtering based on
   independent component analysis are introduced. The independent component
   of combustion noise provides the time location and spectral distribution
   information about the combustion noise, so a time frequency covering
   region can be constructed accordingly, and applied to filter the
   measured noise signal. Time frequency distribution of combustion noise
   can be derived. Furthermore, the combustion noise intensity can be
   calculated. It is found that the combustion noise intensity under pilot
   injection is lower than that without pilot injection at most of the
   measurement points. This indicates that pilot injection can decrease
   combustion noise of diesel engines.

备注：新增回溯数据