Abstract
It is very important for the gas engine to improve its fuel economy, low emission and power performance. To solve this problem, the air fuel ratio should be controlled accurately. In order to keep the air fuel ratio around 16.7, an air-fuel ratio parallel control method, which is based on CMAC neural network and PID, is adopted and its arithmetic is elaborated in this paper. The parallel control method is also compared with the one using PID only. The simulation result shows that air fuel ratio could be controlled at the range of 16.7 by the parallel control method.
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