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Torque allocation of four-wheel drive EVs considering tire slip energy

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Abstract

With the increasing peak torque of the in-wheel motor, the tire slip energy dissipation becomes as considerable as the motor energy loss. The actuation redundancy in four-wheel drive electric vehicles has the innate advantage of reducing the energy dissipation of the tire slip according to different criteria. This study innovatively optimizes the energy loss of the motor and the slip energy consumption of the tire under a unified framework. A more accurate calculation model of the tire slip force and slip energy is adopted in the cost function. Its feasibility and potential are shown through simulation case studies based on different road adhesion coefficients among three allocation methods: considering both motor energy loss and tire slip loss, only considering the motor energy loss, and only considering the axis load distribution. The simulation results demonstrate that the torque allocation method considering both motor energy loss and tire slip loss can dramatically reduce the tire slip energy and tire wear with an acceptable motor energy efficiency sacrifice compared to the present allocation algorithms.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 61520106008, 61790564), Jilin Provincial Science Foundation of China (Grant No. 20190103047JH), and China Automobile Industry Innovation and Development Joint Fund (Grant No. U1864206).

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Authors and Affiliations

  1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, 130025, China

    Bingzhao Gao, Yongjun Yan, Hong Chu, Hong Chen & Nan Xu

  2. Clear Energy Automotive Engineering Center, Tongji University, Shanghai, 201804, China

    Hong Chen

Authors
  1. Bingzhao Gao
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  2. Yongjun Yan
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  3. Hong Chu
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  4. Hong Chen
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  5. Nan Xu
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Correspondence to Nan Xu.

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Gao, B., Yan, Y., Chu, H. et al. Torque allocation of four-wheel drive EVs considering tire slip energy. Sci. China Inf. Sci. 65, 122202 (2022). https://doi.org/10.1007/s11432-019-2946-8

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  • DOI: https://doi.org/10.1007/s11432-019-2946-8

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