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Design of a Hydraulic Control Unit for a Two-Speed Dedicated Electric Vehicle Transmission

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Abstract

Two-speed automatic transmission is one solution to increase the economic efficiency and dynamic performance of battery electric vehicles (BEV). Hydraulic control unit (HCU) is a key component in automatic transmissions, which determines the quality of shifting directly. Based on the structural scheme and shift logic of a two-speed dedicated electric vehicles transmission (2DET) with two wet clutches, we designs a 2DET hydraulic control unit composed of three subsystems: pressure regulating and flow control system, shift operated and control system and cooling and lubrication system. The results of the experiments, including the valve body bench test, transmission bench test and vehicle test, show that the design of hydraulic control unit meets the requirements.

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Abbreviations

BEV:

Battery electric vehicle

HCU:

Hydraulic control unit

2DET:

Two-speed dedicated electric vehicle transmission

References

  1. Roberts, S.: Multispeed transmission for electric vehicles. ATZ Worldw. 114(4), 8–11 (2012)

    Article  Google Scholar 

  2. Sorniotti, A., Holdstock, T., Pilone, G.L., et al.: Analysis and simulation of the gearshift methodology for a novel two-speed transmission system for electric powertrains with a central motor. Proc. Insti. Mech. Eng. Part D J. Automob. Eng. 226(7), 915–929 (2012)

    Article  Google Scholar 

  3. Xu, X.Y., Chen, Z.F., Liu, Y.J., et al.: Enumerative optimization procedure for the gear train optimization problem of a two-speed dedicated electric transmission. Energies 10, 1362 (2017)

    Article  Google Scholar 

  4. Bai, S.S., Joel, M., Peng, H.: Dynamic Analysis and Control System Design of Automatic Transmissions. SAE International, Pennsylvania (2013)

    Google Scholar 

  5. Wang, S.H., Xu, X.Y., Liu, Y.F., et al.: Design and dynamic simulation of hydraulic system for a new automatic transmission. J. Central South Univ. Technol. 16(4), 697–701 (2009)

    Article  Google Scholar 

  6. Wang, S.H., Xu, X.Y., Liu, Y.F., et al.: Design and dynamic simulation of hydraulic system for AT. J. Beijing Univ. Aeronaut. Astronaut. 35(7), 859–864 (2009)

    Google Scholar 

  7. Zhang, T., Tao, G., Chen, H.: Simulation and parameter optimization of PCV in shift hydraulic system. In: International Conference on Communication Software and Networks, Xi’an, pp. 650–654 (2011)

  8. Dongm, P., Liu, Y.F., Jiang, E.Q., et al.: Oil pressure characteristic of automatic transmission’s shift control unit and clutch failure analysis. In: ICCASM Conference, Taiyuan, pp. 42–46 (2010)

  9. Liu, Z., Han, X., Liu, Y.F., et al.: Dynamic simulation of large flow solenoid valve. In: ASME 2016 International Mechanical Engineering Congress and Exposition, Phoenix (2016)

  10. Lee, G.S., Sung, H.J., Kim, H.C., et al.: Flow force analysis of a variable force solenoid valve for automatic transmissions. J. Fluids Eng. 132(3), 031103 (2010)

    Article  Google Scholar 

  11. Liu, Y.F., Dai, Z.K., Xu, X.Y., et al.: Multi-domain modeling and simulation of proportional solenoid valve. J. Central South Univ. Technol. 18(5), 1589–1594 (2011)

    Article  Google Scholar 

  12. Xu, X.Y., Han, X., Liu, Y., et al.: Modeling and dynamic analysis on the direct operating solenoid valve for improving the performance of the shifting control system. Appl. Sci. 7(12), 1266 (2017)

    Article  Google Scholar 

  13. Han, X.: Research on the Hydraulic Control System of a Two-Speed Dedicated Electric Transmission. Beihang University, Beijing (2018)

    Google Scholar 

  14. Chen, Z., Liu, Y., Fu, Y., et al.: Motor-torque-limited power-on upshift control in electric vehicles with automatic transmissions. Proc. Inst. Mech. Eng/ Part D J. Automob. Eng. 230, 1 (2016)

    Google Scholar 

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (No. 51405010) and Beijing Key Laboratory for High-efficient Power Transmission and System Control of New Energy Resource Vehicles.

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Authors and Affiliations

  1. School of Transportation Science and Engineering, Beihang University, Beijing, 100191, China

    Xiangyang Xu, Wenbo Sun, Tianyuan Cai, Yanfang Liu & Xiao Han

  2. Beijing Key Laboratory for High-efficient Power Transmission and System Control of New Energy Resource Vehicle, Beihang University, Beijing, 100191, China

    Xiangyang Xu, Wenbo Sun, Tianyuan Cai, Yanfang Liu & Xiao Han

Authors
  1. Xiangyang Xu
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  2. Wenbo Sun
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  3. Tianyuan Cai
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  4. Yanfang Liu
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  5. Xiao Han
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Correspondence to Yanfang Liu.

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Xu, X., Sun, W., Cai, T. et al. Design of a Hydraulic Control Unit for a Two-Speed Dedicated Electric Vehicle Transmission. Automot. Innov. 1, 300–310 (2018). https://doi.org/10.1007/s42154-018-0039-3

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  • DOI: https://doi.org/10.1007/s42154-018-0039-3

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