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A Comprehensive Real-Time Thermal Management of All-Wheel-Drive (AWD) Clutches for Active Torque Control
Technical Paper
2021-01-0694
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE WCX Digital Summit
Language:
English
Abstract
An AWD vehicle can operate in 4WD/2WD either full-time or on-demand by actively controlling the clutch. Active clutch control of AWD vehicles requires an accurate prediction of system-level thermal behavior of the Rear Axle Rear Drive Module (RDM), which generally comprises various components such as bearings, gears, differentials, lube oil and clutches.
A system-level thermal model was developed in a one-dimensional (1D) framework using inputs from empirical, physics-based models and test data. Empirical models were used to obtain heating due to efficiency loss from all rotating and meshing components of the RDM. Three-dimensional computational fluid dynamics (CFD) conjugate heat transfer (CHT) simulations and bench scale testing were used to obtain oil flowrates and heating within the RDM and clutch at various speeds.
At the component-level, the 1D model includes details of the clutch pack to predict clutch interface temperature. At the system-level, details of the RDM were included and both oil and housing temperature were predicted, accounting for oil flow dynamics. The model was generalized to predict real-time thermal dynamics of the clutch and RDM for a given input torque, wheel speed and clutch slip speed.
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Citation
Yashwanth, B., Ankala, A., Honkala, K., Kolesnikov, A. et al., "A Comprehensive Real-Time Thermal Management of All-Wheel-Drive (AWD) Clutches for Active Torque Control," SAE Technical Paper 2021-01-0694, 2021, https://doi.org/10.4271/2021-01-0694.Also In
References
- Chen , G. , Baldwin , K. , and Czarnecki , E. Real Time Virtual Temperature Sensor for Transmission Clutches SAE Int. J. Engines 4 1 1523 1535 2011 https://doi.org/10.4271/2011-01-1230
- Newcomb , T. , Sparrow , M. , and Ciupak , B. Glaze Analysis of Friction Plates SAE Technical Paper 2006-01-3244 2006 https://doi.org/10.4271/2006-01-3244
- Naidu , S.K. , Klaus , E.E. , and Duda , J.L. Kinetic Model for High-Temperature Oxidation of Lubricants Ind. Eng. Chem. Prod. Res. Dev. 25 4 596 603 1986 https://doi.org/10.1021/i300024a601
- Newcomb , T.P. Temperatures Reached in Friction Clutch Systems Journal of Mechanical Engineering Science 2 4 273 287 1960 10.1243/JMES_JOUR_1960_002_037_02
- Wu , H. An Analysis of the Engagement of Wet-Clutch Plates Wear 24 23 1973 https://doi.org/10.1016/0043-1648(73)90200-7
- Yang , Y. , Lam , R. , Chen , Y. , and Yabe , H. Modeling of Heat Transfer and Fluid Hydrodynamics for a Multidisc Wet Clutch SAE Technical Paper 950898 1995 https://doi.org/10.4271/950898
- Jang , J.Y. and Khonsari , M.M. Thermal Characteristics of a Wet Clutch ASME. J. Tribol. 121 3 610 617 July 1999 https://doi.org/10.1115/1.2834111
- Lai , Y.G. Simulation of Heat Transfer Characteristics of Wet Clutch Engagement Processes Numerical Heat Transfer, Part A 33 1998 10.1080/10407789808913956
- Ivanović , V. , Herold , Z. , Deur , J. , Hancock , M. et al. Experimental Characterization of Wet Clutch Friction Behaviors Including Thermal Dynamics SAE Int. J. Engines 2 1 1211 1220 2009 https://doi.org/10.4271/2009-01-1360
- Marklund , P. , Rikard , M. , Roland , L. , Erik , H. et al. Thermal Influence on Torque Transfer of Wet Clutches in Limited Slip Differential Applications Tribology International 40 5 876 884 2007 https://doi.org/10.1016/j.triboint.2006.09.004
- 2001
- 2001
- Osanai , H. , Ikeda , K. , and Kato , K. Relations between Temperature in Friction Surface and Degradation of Friction Materials during Engaging of Wet Friction Paper SAE Technical Paper 900553 1990 https://doi.org/10.4271/900553
- Chen , Y.-F. , Newcomb , T. , and Lam , R.C. Friction Material/Oil Interface for Slipping Clutch Applications SAE Technical Paper 2001-0101153 2001 https://doi.org/10.4271/2001-01-1153
- Guan , J. , Willermet , P. , Carter , R. , and Melotik , D. Interaction between ATFs and Friction Material for Modulated Torque Converter Clutches SAE Technical Paper 981098 1998 https://doi.org/10.4271/981098