Wavelet Analysis of Cycle-to-Cycle Pressure Variations in an Internal Combustion Engine

Details Wavelet Analysis of Cycle-to-Cycle Pressure Variations in an Internal Combustion Engine Wavelet Analysis of Cycle-to-Cycle Pressure Variations in an Internal Combustion Engine

2006-07-19

arxiv.org/abs/nlin/0607041v1

Nonlinear Sciences

Chaotic Dynamics

20 pages, 8 figures

Scientific paper

Using a continuous wavelet transform we have analyzed the cycle-to-cycle variations of pressure in an internal combustion engine. The time series of maximum pressure variations are examined for different loading and their wavelet power spectrum is calculated for each load. From the wavelet power spectrum we detected the presence of long, intermediate and short-term periodicities in the pressure signal. It is found that depending on the load, the long and intermediate-term periodicities may span several cycles, whereas the short-period oscillations tend to appear intermittently. Knowledge of these periodicities may be useful to develop effective control strategies for efficient combustion.

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