A Sandwich Model Based Internal Model Control for EGR Valve

Abstract

A nonlinear internal model controller for exhaust gas recirculation (EGR) system is designed in this paper. The design of internal model controller must rely on an accurate identification model. Firstly, a sandwich model is applied to describe the EGR system. The sandwich model identifies the system by parts, which can improve the accuracy of identification. Next, based on the built model, a nonlinear internal model control (NIMC) method for the EGR system is proposed. Then, the effects of NIMC and traditional PID control are compared, and the experimental results indicate the validation of the designed controller.