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Estimation of a Noise Level Using Coarse-Grained Entropy of Experimental Time Series of Internal Pressure in a Combustion Engine

Grzegorz Litak·Rodolfo Taccani·Krzysztof Urbanowicz·Janusz A. Holyst·Miroslaw Wendeker·Alessandro Giadrossi
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Abstract

We report our results on non-periodic experimental time series of pressure in a single cylinder spark ignition engine. The experiments were performed for different levels of loading. We estimate the noise level in internal pressure calculating the coarse-grained entropy from variations of maximal pressures in successive cycles. The results show that the dynamics of the combustion is a nonlinear multidimensional process mediated by noise. Our results show that so defined level of noise in internal pressure is not monotonous function of loading.

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Grzegorz Litak, Rodolfo Taccani, Krzysztof Urbanowicz, Janusz A. Holyst, Miroslaw Wendeker, Alessandro Giadrossi. 2004-05-22. Estimation of a Noise Level Using Coarse-Grained Entropy of Experimental Time Series of Internal Pressure in a Combustion Engine. https://doi.org/10.1016/j.chaos.2004.06.057

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