Abstract

In this paper, the new exhaust gas recirculation (EGR) control scheme for Diesel engine is proposed. EGR is so far the most promising approach to reduce in-cylinder NOx formation. The design of EGR control system for modern Diesel engine is based on MAP which is obtained from experiments. The many experiments with different engine speed and loads are necessary. MAP from experiments is not accurate, cannot be used for all the range exactly in case of engine running conditions. Therefore, it is very difficult to design PID controller based on MAP. Moreover, the robust performance cannot be achieved. To overcome these problems, the control scheme based on artificial neural network (ANN) is proposed. This controller has good robust performance and rapid adjustment. From experiments, the system using this controller can achieve good performance.

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