Development and Optimization of Control Strategy of Electric Driving Mode for a Novel Compound Power-Split Hybrid Electric Vehicle: Presented at EVS 31 EVTeC 2018, Kobe, Japan, October 1 - 3, 2018

摘要

Due to two additional wet clutches mounted in this hybrid transmission, the increasing available electric driving modes offer many possibilities to propel the hybrid electric vehicle (HEV) in higher efficiency. A new control strategy for electric driving mode is necessary to be developed and optimized. Firstly, a novel compound power-split HEV is presented and its dynamic model is depicted. Secondly, the various electric driving modes are investigated with equivalent lever diagrams. Thirdly, a control strategy for electric driving modes is discussed and a transient optimization algorithm is applied to find the optimal electric driving mode, the torques of break clutches and the desired rotation speed of the equivalent carrier. Finally, the control strategy and optimization algorithm are validated in simulation. The simulation results show that this proposed control strategy can indeed improve the system efficiency.