Research on Braking Force Distribution Strategy of Composite Braking System of Hybrid Electric Vehicle
J. H. Tang, K. Y. Wang, S. Y. Bei, & M. M. Sousa
†School of Automotive and Traffic Engineering, Jiangsu University of Technology, Changzhou City, 213001, China,‡Fluid Mechanics Laboratory, Mechanical Engineering and Aeronautics Department, University of Patras, Patras, Greece
ABSTRACT: Based on the structure models of the composite braking system with friction brake, hydraulic retarder and regenerative braking, the mathematical models of electric machinery, battery, hydraulic retarder, the temperature rise of friction brake and the braking force distribution strategy on hybrid electric vehicle are established. The braking force distribution curve of composite braking system is studied on basis of maximum braking force of the driving wheel. Based on the maximum recovered energy and the minimum thermal recession of friction brake, the braking force distribution strategy of composite braking system is formulated. The simulation models of the composite brake system are established based on the MATLAB/Simulink software. For the small, medium and large braking strength, the simulation analysis on the braking force distribution, the temperature rise of friction brake and the recovered energy is carried out according to the different speeds and the different adhesion coefficients of road. The simulation results show that the braking force distribution strategy can improve the recovery rate of braking energy and the braking stability, and effectively prevent the occurrence of thermal recession. The mathematical models and simulation models proposed are correct and feasible, which provide a theoretical basis for the follow-up study.
Keywords : Automotive engineering; hybrid electric vehicle; composite braking system; braking force distribution.
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