期刊
MECCANICA
卷 44, 期 1, 页码 1-11出版社
SPRINGER
DOI: 10.1007/s11012-008-9148-0
关键词
Stochastic process; Nonlinear time series analysis; Mechanics of machines; Combustion process; Indicated pressure
类别
资金
- Marie Curie Actions, Transfer of Knowledge [MTKD-CT-2004-014058]
In this paper we analyze the cycle-to-cycle variations of peak pressure p (max) and peak pressure angle alpha (pmax) in a four-cylinder spark ignition engine. We examine the experimental time series of p (max) and alpha (pmax) for three different spark advance angles. Using standard statistical techniques such as return maps and histograms we show that depending on the spark advance angle, there are significant differences in the fluctuations of p (max) and alpha (pmax) . We also calculate the multiscale entropy of the various time series to estimate the effect of randomness in these fluctuations. Finally, we explain how the information on both p (max) and alpha (pmax) can be used to develop optimal strategies for controlling the combustion process and improving engine performance.
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