Analysis and control of the air system of a turbocharged gasoline engine

This paper investigates the modelling and the control of a turbocharged air system of a gasoline engine. The purpose of the work described here is to propose a new control strategy based on an original physical model of the system. Starting from a model described in a previous publication, we analyze the system properties in terms of states of equilibrium, stability, and robustness. This analysis justifies the structure chosen for the innovative control strategy, based on the inversion of the model. This strategy takes input constraints into account and includes an anti windup scheme. Experimental results are proposed on a 4 cylinder turbocharged gasoline engine, along with a comparison between the contribution of the different terms of the control strategy.