Robust model predictive control of engine idle speed with distrubance observer

In this paper, a linearization engine model at idle speed was developed according to the physical model and engine test map data. Based on this model, an integrated observer and robust model predictive control (MPC) controller design technique was proposed, which can improve the engine idle speed fuel economy, and guarantee that engine speed is not drop too much even when sudden load emerged. The stability and feasibility of MPC controller was also discussed in this paper. A commercial engine model is utilized to assess the performance of the controller. Simulation results on this model show us that the designed MPC controller can achieve desired performance.