Modeling and identification of a mechatronic exhaust gas recirculation actuator of an internal combustion engine

This paper addresses the physical modeling and identification of an EGR Actuator. The EGR actuator has a nonlinear behavior due to its mechanical construction and different friction forces. A nonlinear physical model for an EGR actuator manufactured by Valeo is presented here. Special focus has been given to modeling frictions with the Dahl Model. Different parts of the actuator and friction have been identified. Comparison between simulation and experimental results shows the effectiveness of the proposed model. The model can act as a reference to characterize different designs and future control strategies.