Abstract:

A piece wise linearized engine speed control model was built based on the idea of torque based engine control using the practical physical model and some of the engine runtime map data. The proposed model fully takes consideration of the external load disturbance and the saturation constraint of actuator. A robust moving horizon optimization control strategy with new performance optimization upper bound was proposed. It was applied to engine speed control, which can guarantee engine speed tracking, improve fuel economy and the ability of anti- disturbance. It is also capable to control the input air intake within the limit of the throttle. A commercial engine model EnDYNA was used to evaluate the performance of the controller. Simulation results show that the proposed controller can achieve desired performance.

Key words: antomatic control technology, engine, map, constraint, optimization, fuel economy, disturbance rejection