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Multi-state control strategy of starting for a wet friction clutch via a fuzzy logic algorithm

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Abstract

Wet multi-plate friction clutches are used in automotive drivelines to transfer torque, change gears, and prevent motion by locking-up components in the transmission. The control strategy of starting is a crucial technology for the application of a wet multi-plate friction clutch in the automotive industry. In this paper, a multi-state fuzzy control strategy for starting is presented and applied to a continuously variably transmission (CVT) powertrain for the validation of this strategy. The operation of the clutch was divided into four states: parking, starting, riding and emergency. The starting state was investigated in detail. A fuzzy algorithm was employed to control the pressure of the hydraulic cylinder acting on the clutch. A distinguishing feature is that the pressure does not increase but decreases to implement smooth starting during the initial period of starting. The rapid-control prototype (RCP) of the wet friction clutch was developed to validate the new control strategy onboard a test vehicle. Based on the experimental results, the multi-state control strategy for a wet friction clutch is a viable candidate for engineering applications.

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Authors and Affiliations

  1. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, 100084, China

    L. He, L. Li, L. -Y. Yu & J. Song

Authors
  1. L. He
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  2. L. Li
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  3. L. -Y. Yu
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  4. J. Song
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Correspondence to J. Song.

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He, L., Li, L., Yu, L.Y. et al. Multi-state control strategy of starting for a wet friction clutch via a fuzzy logic algorithm. Int.J Automot. Technol. 12, 537–544 (2011). https://doi.org/10.1007/s12239-011-0063-3

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  • DOI: https://doi.org/10.1007/s12239-011-0063-3

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