Publisher : The Korean Society of Automotive Engineers
DOI : 10.7467/KSAE.2016.24.2.183
Title & Authors
Characteristic Dynamics Torque Vibration of Behavior in Wet Clutch Engagement for Dual Clutch Transmissions Cho, Jaecheol; Kim, Woojung; Jang, Jaeduk; Jang, Siyoul;
Engine torque is transferred to the transmission where drag torque is minimized improving fuel efficiency. This is particularly true in a wet clutch pack. This study measures slip friction when the wet clutch pack in a DCT (Dual-Clutch Transmission) is disengaged, and the friction pads are slipping. Shudder engagement velocity, and applied forces can be measured under various working conditions through these torque transfer experiments. Test results demonstrate that the design parameters, and engagement conditions of wet clutch packs can be optimized to reduce shudder and frictional vibration during engagement in a dual clutch transmission.
F. R. Shaver, Manual Transmission Clutch Systems, SAE, Warrendale, 1997.
C. L. Davis, F. Sadeghi and C. M. Krousgrill, "A Simplified Approach to Modeling Thermal Effects in Wet Clutch Engagement : Analytical and Experiment Comparison," Transactions of the ASME. Vol.122, pp.110-118, 2000.
D. N. Centea, H. Rahnejat and M. T. Menday, The Influence of Interface Coefficient of Friction upon the Propensity to Judder in Automotive Clutches, Proc. Instn. Mech. Engrs., Part D: J. Automobile Engrg. 213 (D2), 1999.
E. J. Berger, F. Sadeghi and C. M. Krousgrill, "Torque Transmission Characteristics of Automatic Transmission Wet Clutch : Experimental Results and Numerical Comparison," Tribology Transactions, Vol.40, Issue 4, pp.539-548, 1997.
N. Patir and H. S. Cheng, "An Average Flow Model for Determining Effects of Threedimensional Roughness on Partial Hydrodynamic Lubrication," Journal of Lubrication Technology, Vol.100, Issue 1, pp.12-17, 1978.
S. K. Lee, D. Y. Kim and M. D. Hur, "A Study on Measuring Clutch Dynamic Torque," Transaction of KSAE, Vol.20, No.5, pp.65-70, 2012.