Wavelet Transform applied to Combustion Noise Analysis in High-speed DI Diesel Engines

2001-01-1545

04/30/2001

Event
SAE 2001 Noise & Vibration Conference & Exposition
Authors Abstract
Content
Traditionally, combustion noise in Diesel engines has been quantified by means of a global noise level determined in many cases through the estimation of the attenuation curve of the block using the traditional discrete Fourier transform technique. In this work, the wavelet transform is used to establish a more reliable correlation between in-cylinder pressure (sources) and noise (effect) during the combustion of a new generation 2 liter DI Diesel engine. Then, in a qualitative sense, the contribution of each source intrinsic to the combustion process is determined for four engine operating conditions and two injection laws. The results have shown high variations in both the in-cylinder pressure and noise power harmonics along the time, which indicates the non-stationary character of this process.
Meta TagsDetails
DOI
https://doi.org/10.4271/2001-01-1545
Pages
13
Citation
Desantes, J., Torregrosa, A., and Broatch, A., "Wavelet Transform applied to Combustion Noise Analysis in High-speed DI Diesel Engines," SAE Technical Paper 2001-01-1545, 2001, https://doi.org/10.4271/2001-01-1545.
Additional Details
Publisher
Published
Apr 30, 2001
Product Code
2001-01-1545
Content Type
Technical Paper
Language
English