Nonlinear Model Predictive Controller Design for Air System Control of Variable Geometry Turbocharged Diesel Engine

摘要

Variable geometry turbocharger (VGT) is a key technology and has become a development trend in the diesel engine industry because it can reduce turbo lag and improve fuel economy. In this paper, nonlinear model predictive control (NMPC) method for VGT is developed to solve the air system control problem of turbocharged diesel engine. Firstly, a model of the turbocharged diesel engine was built in AMESim. Secondly, the desired torque is converted into the desired exhaust manifold pressure through the look-up table. Thirdly, The VGT controller based on NMPC is designed to achieve the desired exhaust manifold pressure tracking while considering constraints on the system input and output. Finally, the effectiveness of the VGT controller is verified.