Experimental Results for Sensor Selection and Multivariable Controller Design for a Heavy-Duty Diesel Engine*

In this paper we consider the issues facing the design of a practical multivariable controller for a heavy duty engine equipped with an exhaust gas recirculation (EGR) valve and variable geometry turbocharger (VGT). Issues facing the selection of sensors are considered, and a combination of physical as well as practical implementation requirements are treated in the choice and design of a model predictive controller. The nonlinearities and the multivariable nature of the system are investigated in order to coordinate both actuators such that the the emission and torque response requirements of the system are met. The process of modeling the engine, development of the controller, the hardware set-up that was utilized in running the controller validation work and, the results of utilizing the proposed system over transient cycles (e.g., FTP) and other certification cycles (e.g., RMCSET cycle) are presented.