Model Predictive Control of Diesel Engine Start-stop Control in an HEV

The engine start-stop technology has been widely concerned in the field of hybrid electric vehicles (HEV) for improving the fuel economy and alleviating environment pollution. In this paper, the model predictive control (MPC) is applied to deal with the control problem of engine start-stop with input constraint. Firstly, a nonlinear engine-BSA (belted starter alternator) coupling model is introduced. Secondly, the Taylor's expression method is applied to linearize the model, and the continuoustime model is transformed into the discrete-time model by using the Euler's method. Thirdly, a linear MPC controller is designed to make the engine speed track the desired engine speed. Finally, the united simulation between AMESim and Simulink/ Matlab is built, and the performance of control strategy is verified by the simulation results.