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Indexed by:期刊论文

Date of Publication:2022-06-29

Journal:内燃机学报

Affiliation of Author(s):能源与动力学院

Volume:27

Issue:4

Page Number:359-362

ISSN No.:1000-0909

Abstract: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.

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