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Research on DCT shifting torque control and a benchmark test

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Abstract

In this study, the working principles of Dual clutch transmission (DCT) are analyzed, the power switching rule for dual clutches during upshift and downshift are formulated, and the model of DCT shift dynamics is established. Subsequently, upshift/downshift control strategies and sliding friction power are simulated and analyzed. A benchmark shift control test is conducted on real DCT vehicles, and test results show that the effect of clutch torque control strategy coincides with actual vehicle control during the upshift process. However, this effect varies during the downshift process. Two different downshift methods are proposed on the basis of the study findings. Moreover, the influence of downshift control method on engine control is analyzed, and the DCT torque control strategy employed during downshift is optimized.

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Authors and Affiliations

  1. School of Mechatronics & Automotive Engineering, Chongqing Jiaotong University, Chongqing, 400074, China

    Tao Deng & Renzhi Lu

  2. Commercial Powertrain Engineering Center, Beiqi Foton Motor CO., LTD., Beijing, 102206, China

    Fengbin Hu

Authors
  1. Tao Deng
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  2. Fengbin Hu
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  3. Renzhi Lu
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Corresponding author

Correspondence to Tao Deng.

Additional information

Recommended by Editor Yeon June Kang

Tao Deng received his B.S. degree from Chongqing Jiaotong University, China, in 2004. He obtained his M.S. and Ph.D. degrees in Automotive Engineering from the State Key Lab of Mechanical Transmission, Chongqing University, China, in 2007 and 2010, respectively. He is currently a Post-doc at the State Key Lab of Mechanical Transmission, Chongqing University, China and an associate professor at the School of Mechatronics & Automotive Engineering, Chongqing Jiaotong University, China.

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Deng, T., Hu, F. & Lu, R. Research on DCT shifting torque control and a benchmark test. J Mech Sci Technol 29, 3581–3589 (2015). https://doi.org/10.1007/s12206-015-0802-x

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  • DOI: https://doi.org/10.1007/s12206-015-0802-x

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