Combustion Process in a Spark Ignition Engine: Dynamics and Noise Level Estimation

Details Combustion Process in a Spark Ignition Engine: Dynamics and Noise Level Estimation Combustion Process in a Spark Ignition Engine: Dynamics and Noise Level Estimation

2003-12-28

arxiv.org/abs/nlin/0312067v1

Nonlinear Sciences

Chaotic Dynamics

15 pages, 7 figures, submitted to CHAOS

Scientific paper

10.1063/1.1739011

We analyse the experimental time series of internal pressure in a four cylinder spark ignition engine. In our experiment, performed for different spark advance angles, apart from usual cyclic changes of engine pressure we observed oscillations. These oscillations are with longer time scales ranging from one to several hundred engine cycles depending on engine working conditions. Basing on the pressure time dependence we have calculated the heat released per cycle. Using the time series of heat release to calculate the correlation coarse-grained entropy we estimated the noise level for internal combustion process. Our results show that for a smaller spark advance angle the system is more deterministic.

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