Abstract
As the key component of hybrid electric vehicles (HEV), the dynamic performance of the power coupling mechanism is found to have a significant effect on the power switching process for the whole vehicle. The research object is the double planetary gear coupling mechanism of hybrid electric vehicles. Through analysis of the relationship between each power source and the planetary gear, this paper obtained the characteristics of a dynamic coupling mechanism under non-steady state (such as engine starting). On the basis of this coupled system, a dynamic coordinated control method is proposed based on model predictive control under unsteady engine operating conditions. The results show that the dynamic coordinated control strategy can effectively reduce the impact of the whole vehicle mode switching, the dynamic coordinated control strategy is adopted, the mode switching process of the power coupling mechanism (engine starting conditions) works smoothly, reducing the total output torque shock, which is conducive to improving the vibration and noise level of the vehicles.
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