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		Jun YANG,Tielong SHEN,Xiaohong JIAO.[en_title][J].Control Theory and Technology,2013,11(4):586~591.[Copy]

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JunYANG,TielongSHEN,XiaohongJIAO
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(Institute of Electrical Engineering, Yanshan University;Department of Engineering and Applied Sciences, Sophia University)

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Received:October 08, 2012Revised:July 25, 2013

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Air-fuel ratio control with stochastic L_2 disturbance attenuation in gasoline engines

Jun YANG,Tielong SHEN,Xiaohong JIAO

(Institute of Electrical Engineering, Yanshan University;Department of Engineering and Applied Sciences, Sophia University)

Abstract:

In this paper, the problem of stochastic L_2 disturbance attenuation of the air-fuel ratio is investigated with consideration of cyclic variation of the residual gas fraction (RGF). A stochastic robust controller is designed based on a discrete-time dynamic model in which the RGF is modeled as a stochastic process with Markovian property. Finally, the sampling process-based statistical analysis for the RGF and the validation of the proposed control law are presented through the experiments conducted on a gasoline engine test bench.

Key words: Residual gas fraction Air-fuel ratio Stochastic robust control