Research on feedforward-feedback speed control of turbocharged diesel engine

In order to improve the load disturbance rejection and rotating speed control effect for the tracked vehicle engine, a feedforward-feedback speed control algorithm is proposed according to the torque-based architecture. A load estimation algorithm is designed based on mean value model and crankshaft dynamic model. The estimation accuracy of the proposed load estimation algorithm is validated under steady and transient conditions. The feedforward-feedback speed control algorithm can significantly improve the capability of load disturbance rejection in the simulation of powertrain. The reseach results show that a rapid speed control effect can be achieved and repetitive calibration of speed control parameters can be avoided during acceleration process of tracked vehicle. The improvement in pedal-rotating speed following characteristics leads to the reduction in unexpected gear shifting of tracked vehicle in a driving cycle.