Nonlinear Model Predictive Control of Dual Loop - Exhaust Gas Recirculation in a Turbocharged Spark Ignited engine

摘要

This paper proposes a Nonlinear Model Predictive Control (NMPC) strategy for Turbocharged SI engines with a Dual Loop Exhaust Gas Recirculation system (DL-EGR). The control problem has been formulated as a reference tracking problem wherein the intake manifold pressure and recirculated cooled exhaust gas fraction are arbitrary references. The desired control actuator positions are derived by solving the NMPC. Simulation results demonstrate that the proposed NMPC optimally regulates the dual EGR circuits depending upon the requested reference trajectories and engine operating conditions resulting in improved tracking of references compared to the NMPC controlling only single loop EGR architectures.