This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
ATF Effects on Friction Stability in Slip-Controlled Torque Converter Clutches
Technical Paper
2003-01-3255
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A model of an automotive powertrain equipped with a slip-controlled torque converter clutch (TCC) is presented that incorporates the clutch control system and the friction-related properties of the automatic transmission fluid (ATF) and clutch friction material. Prior research has established that stability of a slip-controlled TCC is enhanced by maintaining a positive slope of the coefficient of friction, μ, with respect to sliding speed, v. The model presented here agrees with this result, but suggests that it is neither a necessary nor sufficient condition guaranteeing stability. The model indicates that other factors affecting stability at the equilibrium sliding speed include the magnitude of μ, the engine speed, the engine torque-speed slope, the ATF pressure, and the time constants of the clutch control system. This model will aid in the development of future wet clutch systems with improved friction stability performance.
Recommended Content
Authors
Topic
Citation
Cameron, T., Tersigni, S., McCombs, T., and Jao, T., "ATF Effects on Friction Stability in Slip-Controlled Torque Converter Clutches," SAE Technical Paper 2003-01-3255, 2003, https://doi.org/10.4271/2003-01-3255.Also In
References
- Bauermeister Marks Standard Handbook for Mechanical Engineers 7th McGraw-Hill 1967
- Hiramatsu T. Akagi T. Yoneda H. “Control Technology of Minimal Slip-Type Torque Converter Clutch” SAE Paper No. 850460
- Hiramatsu T. “Electronically Controlled 4-Speed Automatic Transmission” Mitsubishi Heavy Industries Technical Review 21 1 1984
- Watts R. F. Nibert R. K. Tandon M. “Anti-Shudder Durability of Automatic Transmission Fluids: Mechanism of the Loss of Shudder Control” “Tribology - Solving Friction and Wear Problems” Bartz W. J. 1341 1358 Technische Akademie Esslingen 10 th International Colloquium 09-11 January 1996
- Srinivasan S. Sunne J. P. Smith D. W. Stinnett D. W. “Prediction of Anti-Shudder Performance of ATFs in CSTCC - Equipped Vehicles Using the Low Speed SAE #2 Machine” Esslingen Conference in 1998 1657 1668
- Matsuo K. Saeki S. Sakurai T. “Study on Anti-Shudder Durability of Automatic Transmission Fluids” Proceedings of '98 International Symposium of ‘Tribology of Vehicle Transmissions’ Yokohama, Japan 1998
- Matsuo K. Saeki S. “Study on the Change of Friction Characteristics with Use in the Wet Clutch of Automatic Transmission” SAE Paper No. 972928
- Kugimiya T. Mitsui J. Yoshimura N. Kaneko H. Akamatsu H. Ueda F. Nakada T. Akiyama S. “Development of Automatic Transmission Fluid for Slip-Controlled Lock-up Clutch Systems” SAE Paper No. 952348 1995
- Kugimiya T. “Effects of Additives for ATF on μ-v Characteristics” Proceedings of the International Tribology Conference Nagasaki, Japan 2000
- Tariku F. Rogers R. “Improved Dynamic Friction Models for Simulation of One-Dimensional and Two-Dimensional Stick-Slip Motion,” ASME Journal of Tribology 123 October 2001 661 669
- Kotwicki A. “Dynamic Models for Torque Converter,” SAE Paper No. 820393 1982
- Hrovat D. Tobler W. “Bond Graph Modeling and Computer Simulation of Automotive Torque Converters,” Journal of the Franklin Institute ½ 93 114 January February 1985
- Paynter H. “The Dynamics and Control of Eulerian Turbomachines,” Journal of Dynamic Systems, Measurement and Control (ASME) 94 198 205 September 1972
- Paynter H. Longoria R. “Efficient Computer Models of Automotive Fluid Couplings and Torque Converters,” 1998 ASME Fluids Engineering Division Summer Annual Meeting, Paper No. FEDSM98-5128 1998
- Setz H. “Computer Predicts Car Acceleration,” SAE Transactions 69 1961
- Press W. Teukolsky S. Vetterling W. Flannery B. Numerical Recipes in C: The Art of Scientific Computing 2nd 1992 Cambridge University Press New York