Control of a turbocharged diesel engine with EGR system using Takagi-Sugeno´s approach

Environmental issues and respect for the European Union´s objectives for green house emissions reduction, has required an improved in the sophistication of control strategies. This article focuses on the control of the air path diesel engine. Most studies consider the following control setup: intake pressure and intake air flow are controlled using EGR and VGT valves. A simple state feddback control law strategy based on a nonlinear control Lyapunov function and D-stabilisation is proposed. LMI terms have been developed. The goal is to achieve the reference tracking of desired values of intake and exhaust pressures. First at all, a description of the airpath system is given, then, the mean value model of the diesel engine is presented and converted into a Takagi-Sugeno´model. The model was validated with the AMEsim software. Finally, to ensure the performance of the proposed approach, simulation results are presented.