Neural Network Modeling of the Emissions and Performance of a Heavy-Duty Diesel Engine
نویسندگان
چکیده
SYNOPSIS Internal combustion engines are being required to comply with increasingly stringent government exhaust emissions regulations. Compression ignition piston engines will continue to be used in cost-sensitive fuel applications such as in heavy-duty buses and trucks, power generation, locomotives, and off-highway applications, and will find application in hybrid electric vehicles. Close control of combustion in these engines will be essential to achieve ever-increasing efficiency improvements while meeting increasingly stringent emissions standards. The engines of the future will require significantly more complex control than existing map-based control strategies, having many more degrees of freedom than those of today. Neural network-based engine modeling offers the potential for a multidimensional, adaptive, learning control system which does not require knowledge of the governing equations for engine performance or the combustion kinetics of emissions formation that a conventional map-based engine model require. The application of a neural network to model the output torque and exhaust emissions from a modern heavy-duty diesel engine (Navistar T444E) is shown to be able to predict the continuous torque and exhaust emissions from a heavy-duty diesel engine for the FTP cycle and two random cycles to within 5% of their measured values after only 100 minutes of transient dynamometer training. Applications of such a neural net model include emissions virtual sensing, on-board diagnostics, and engine control strategy optimization.
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