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Torque Transmissibility Assessment for Automotive Dry-Clutch Engagement

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4 Author(s)
Vasca, Francesco ; Dipt. di Ing., Univ. degli Studi del Sannio, Benevento, Italy ; Iannelli, Luigi ; Senatore, A. ; Reale, G.

Dry clutches are widely used in conventional and innovative automotive drivelines and represent a key element for automated manual transmissions (AMTs). In practical applications, it is fundamental to model the clutch behavior through its torque transmissibility characteristic, i.e., the relationship between the throwout bearing position (or the pressure applied by the clutch actuator) and the torque transmitted through the clutch during the engagement phase. In this paper, a new model for the torque transmissibility of dry clutches is proposed. It is analyzed how the transmissibility characteristic depends on: friction pads geometry, cushion spring compression, cushion spring load, and slip-speed-dependent friction. Corresponding functions are suitably composed determining the torque transmissibility expression. An experimental procedure for tuning the characteristic parameters is presented. The clutch-torque transmissibility model is tested on a detailed cosimulation model with a typical AMT controller.

Published in:

Mechatronics, IEEE/ASME Transactions on  (Volume:16 ,  Issue: 3 )

Date of Publication:

June 2011

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