A Dynamic model of Homogeneous Charge Compression Ignition (HCCI), based on chemical kinetics principles and artificial\r\nintelligence, is developed. The model can rapidly predict the combustion probability, thermochemistry properties, and exact\r\ntiming of the Start of Combustion (SOC). A realization function is developed on the basis of the Sandia National Laboratory\r\nchemical kinetics model, and GRI3.0 methane chemical mechanism. The inlet conditions are optimized by Genetic Algorithm\r\n(GA), so that combustion initiates and SOC timing posits in the desired crank angle. The best SOC timing to achieve higher\r\nperformance and efficiency in HCCI engines is between 5 and 15 degrees crank angle (CAD) after top dead center (TDC). To\r\nachieve this SOC timing, in the first case, the inlet temperature and equivalence ratio are optimized simultaneously and in the\r\nsecond case, compression ratio is optimized by GA. The model�s results are validated with previous works. The SOC timing can be\r\npredicted in less than 0.01 second and the CPU time savings are encouraging. This model can successfully be used for real engine\r\ncontrol applications.
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