Design Method for Hybrid Electric Vehicle Powertrain Configuration with a Single Motor

Bo Huang, Minghui Hu, Li Zeng, Guangshun Fu and Qinglong Jia
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Bo Huang: School of Mechanical Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
Minghui Hu: State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China
Li Zeng: State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China
Guangshun Fu: State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China
Qinglong Jia: State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China

Sustainability, 2022, vol. 14, issue 13, 1-22

Abstract: Existing design methods for hybrid power system configurations obtain new solutions based on experience, structure improvement or optimization, exhaustive searching, and the screening of schemes at the expense of less innovation and less efficiency. Furthermore, these methods lack mechanisms involving automotive theory to guide powertrain configuration design. In this study, a design method of configuration with a single motor based on basic schemes of speed and torque decoupling was proposed from the perspective of the hybrid electric vehicle fuel-saving mechanism. First, the coupling characteristics of speed and torque in the basic scheme were analyzed from four perspectives. Thereafter, new configurations that meet operation requirements were derived via configuration reconstruction, which combined the better basic schemes with brakes, clutches, and transmissions. A multidimensional evaluation and screening method based on dynamic performance, economic performance, and adaptability was built. A comparison of S-4 with Toyota Hybrid System, which was performed to demonstrate the feasibility of the design method, revealed that both configurations perform similarly in terms of economic performance, but the dynamic performance of the S-4 is greater by approximately 50%. The times required to attain 100 km/h from 0 km/h for THS and S-4 are 13.5 s and 6.69 s, respectively.

Keywords: hybrid power system; decoupling of speed and torque; basic configuration scheme; performance evaluation; configuration design method (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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