| Citation: | LIU X W,XU X Y,HUANG H,et al. Analysis of power reflux problem and its solution of THS[J]. Journal of Beijing University of Aeronautics and Astronautics,2025,51(3):874-880 (in Chinese) doi: 10.13700/j.bh.1001-5965.2023.0110 |
After analyzing the occurrence and the reason behind the power reflux in toyota hybrid system (THS) at high speeds, a novel hybrid electromechanical coupling system scheme that can address the power reflux issue is put forth. The system not only solves the power reflux problem, but also adds an engine direct drive mode and reduces fuel consumption by adding a brake based on THS. By comparing the fuel consumption of the two systems under constant speed conditions, it is found through simulation that the fuel consumption at 90 km/h and 120 km/h can improve by 7.7% and 3.9% after adding brakes. Furthermore, an analysis is conducted on the control strategies employed by the two systems under the two constant speed conditions. The findings indicate that the enhanced system circumvents THS’s power return issue, enhances system efficiency, and optimizes the vehicle's fuel consumption when it employs the engine direct drive mode.
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