Adaptive Mode Selection Strategy for Series-Parallel Hybrid Electric Vehicles Based on Variable Power Reserve

Jingzheng Fan, Bingfeng Zu, Jianwei Zhou, Zhen Wang and Haopeng Wang
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Jingzheng Fan: Internal Combustion Engine Research Institute, Tianjin University, Tianjin 300072, China
Bingfeng Zu: Internal Combustion Engine Research Institute, Tianjin University, Tianjin 300072, China
Jianwei Zhou: Tianjin Trumpjet Power Technology Co., Ltd., Tianjin 300072, China
Zhen Wang: Internal Combustion Engine Research Institute, Tianjin University, Tianjin 300072, China
Haopeng Wang: Internal Combustion Engine Research Institute, Tianjin University, Tianjin 300072, China

Energies, 2021, vol. 14, issue 11, 1-18

Abstract: When the series-parallel hybrid electric vehicle exits the pure electric mode, the battery provides power for the drive motor and integrated starter generator ( ISG ) to drive the vehicle and start the engine. If the battery discharge power is insufficient, the driving power will drop, which will inhibit the vehicle from accelerating and impair drivability. Considering that the mode selection strategy determines the timing of mode switching, this paper proposes an adaptive mode selection strategy based on variable power reserve to allow the vehicle to switch mode considering the battery power limitation. The effectiveness of this strategy is verified by simulation, and its influence on fuel consumption and battery utilization is analyzed. Compared with the mode selection strategy based on logic thresholds at the same initial battery state of charge ( SOC ), under the high-speed and aggressive US06 cycle, the total driving power drop is reduced by 74.2%, and the over-discharge power of the battery is fully restrained while keep almost the same fuel consumption; under the city FTP cycle, the total driving power drop is reduced 65%, and fuel consumption is reduced while maintaining SOC at a reasonable level.

Keywords: hybrid electric vehicle; adaptive mode selection; drivability; variable power reserve; mode switching (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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