Idle Mode Control on a Combustion Engine Test Bench via Internal Model Control

In this paper we present an adaptive output regulation approach for idle mode simulation on combustion engine test benches. Therefore the torque ripples caused by the combustion oscillations have to be compensated. The combustion oscillations are modeled applying a parameter dependent exosystem whose parameter is related to the mean value engine speed which is a partly unknown quantity. Due to this reason we adapt existing literature on redundant adaptive internal model design and reduced order internal model design in order to achieve a fast converging output regulator. Furthermore we present the idea of an non-adaptive internal model based regulator in the case when the combustion oscillations are modeled by a reduced order nonlinear exosystem. At the end the methods are compared to a standard Hoo feedback controller and the advantages of the presented approaches are discussed.