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Smart Control of DCT Proportional Solenoid Valve Based on Data Mining

  • Vehicle Dynamics and Control, Other Fields of Automotive Engineering
  • Published:
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Abstract

High performance of clutch control is essential for dual-clutch transmission (DCT) system to ensure good shifting smoothness of vehicle driving. The control performance of clutch in DCT driven by proportional solenoid valve depends on the output pressure control of the solenoid valve, while the output pressure of the solenoid valve is directly controlled by the energized current. Therefore, the relationship between working current and output pressure of the solenoid valve has significant impact on the clutch control and affects driving performance of the vehicle accordingly. However, the pressure-to-current (P/I) relationship of proportional solenoid valve has nonlinear hysteresis characteristic caused by magnetic materials, oil viscous friction, operation temperature, etc., which has negative effects on the accuracy and stability of solenoid valve pressure control. To cope with this problem, a machine learning model called long short-term memory (LSTM) for P/I of solenoid valve based on data mining is adopted in this paper, which is then used as feedforward compensation for closed-loop control of solenoid valve. The test result demonstrates that the machine learning model can effectively predict the output pressure at rising and falling phase of the same working current. Besides, this smart control method which has better applicability in engineering can effectively improve the control performance of proportional solenoid valve and further improve clutch control and vehicle driving performance.

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Data availability

The control method based on P/I characteristics is widely known in the field of solenoid valve control and has strong practicality. Based on the data analysis and comparison in Figures 14–17, this paper demonstrates the significant improvement of control performance by data mining.

Abbreviations

P line :

Line pressure of clutch hydraulic system

P cmd :

Pressure command

P fb :

Pressure feedback

P act :

Actual pressure

I cmd :

Current command

I comp :

Current compensation

I fb :

Current feedback

I ctrl :

Controlled current

I act :

Actual current

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Acknowledgements

This project is supported by National Natural Science Foundation of China (Grant No. 52075388).

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Authors and Affiliations

  1. College of Automotive Studies, Tongji University, Shanghai, 201804, China

    Qing Yang & Guangqiang Wu

  2. United Automotive Electronic Systems, Shanghai, 201206, China

    Subin Zhang

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  1. Qing Yang
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  2. Guangqiang Wu
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Correspondence to Guangqiang Wu.

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Yang, Q., Wu, G. & Zhang, S. Smart Control of DCT Proportional Solenoid Valve Based on Data Mining. Int.J Automot. Technol. (2024). https://doi.org/10.1007/s12239-024-00053-3

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  • DOI: https://doi.org/10.1007/s12239-024-00053-3

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