Abstract
Exhaust gas recirculation(EGR) has been applied to improve the fuel consumption recently. Internal EGR gives a great impact to the dynamic characteristics of the air induction system. Therefore, air fuel ratio(AFR) controllers have to compensate the effect for the prification efficiency of exhaust gas emissions. In this study, the backstepping and a feedforward controls with the adaptive mechanism were applied to the air fuel ration control and the robustness was demonstrated experimentally. The proposed controller showed a sufficiently robustness and a highly precise AFR control.
