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Low and High Temperature Non-Newtonian Behavior of Automatic Transmission Fluids
Technical Paper
2002-01-1695
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Rheological properties of automatic transmission fluids (ATFs) are typically characterized by their kinematic (ASTM D 445) and Brookfield (ASTM D 2983) viscosities. However, ATFs contain polymeric viscosity modifiers, which often result in non-Newtonian fluid behavior as the polymers align and stretch under the shear stresses experienced in automatic transmissions. Therefore, the standard rheological tests, which are normally run under low shear stresses, may not adequately characterize an ATF's flow properties under the operating conditions of the automatic transmission. This study was designed to characterize the rheological properties of ATFs containing different amounts of viscosity modifiers, different base oil types and different levels of permanent shear stability under the shear and temperature conditions which exist in automatic transmissions. The results indicate that fluids with the same kinematic and Brookfield viscosities can have viscosities under typical transmission operating conditions that differ by as much as 40%.
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Authors
Citation
Sarkar, R., Devlin, M., Li, S., Glasgow, M. et al., "Low and High Temperature Non-Newtonian Behavior of Automatic Transmission Fluids," SAE Technical Paper 2002-01-1695, 2002, https://doi.org/10.4271/2002-01-1695.Also In
References
- Briant, J. Denis, J. Parc G. “Rheological Properties of Lubricants”, Editions Technip 1989
- Mortier, R.M. Orszulik S.T. “Chemistry and Technology of Lubricants” VCH Publishers, Inc. 1992
- Schulz, D.N. Glass J.E. “Polymers of Rheology Modifiers” ACS Symposium Series 462 1991
- 2000 1998 1992 1978
- Venerus, D.C. Klaus, E.E Duda J.L. “Low Temperature Rheology of Hydrocarbon Lubricants” SAE Paper 872048 1987
- Lee, F.L. Klaus, E.E. Duda J.L. “Measurement and Analysis of High-Shear Viscosities of Polymer Containing Lubricants” SAE Paper 881663 1988
- Kemp, S.P. Linden J.L. “Physical and Chemical Properties of a Typical Automatic Transmission Fluid” SAE Paper 902148 1990
- Larsson, R. Larsson, P.O. Eriksson, E. Sjoberg, M. Hoglund E. “Lubricant Properties for Input to Hydrodynamic and Elastohydrodynamic Lubrication Analyses” Proc. Instn. Mech. Engrs 214 2000
- Duda, J.L. Klaus E.E. Lin S-C. “Capillary Viscometry Study of Non-Newtonian Fluids: Influence of Viscous Heating” Ind. Eng. Chem. Res. 27 2 1988
- Moore, A.J. Cooper, D. Robinson T.M. “Rheological Properties of Engine Crankcase and Gear Oil Components in Elastohydrodynamic Oil Films” SAE Paper 941977 1994
- Bair S. “The Variation of Viscosity with Temperature and Pressure for Various Real Lubricants” Journal of Tribology 123 2001
- Lloyd, W.A Perez, J.M. Pruden, D. Henderson, K.O. Alexander D.L. “Viscosity of Driveline Lubricants by a Special Min-Rotary Viscometer Technique” SAE Paper 1999-01-3672 1999
- Sprys, J.W. Doi, J. Furumoto, M. Hoshikawa, N. King, T. Hurashina, H. Linden, J. Yasuhiro, Y. Ueda F. “Shear Stability of Automatic Transmission Fluids. Methods and Analysis. A Study by the International Lubricants Standardization and Approval Committee (ILSAC) ATF Subcommittee” SAE Paper 982673 1998
- Kinker B. “Automatic Transmission Fluid Shear Stability Testing and Viscosity Modifier Trends” Proceedings International Symposium of Tribology of Vehicle Transmissions 1998
- Schoedel U.F. “Automatic Transmission Fluids (ATF)- The improvement of low temperature characteristics” Lubrication Engineering 47 6 1991
- Sprys, J.W. Vaught, D.R. Stephens E.L. “Shear Viscosities of Automatic Transmission Fluids” SAE Paper 941885 1994
- SAE J300 Engine Oil Viscosity Classification 1999
- ASTM D 4485 Standard Specification for Performance of Engine Oils.
- General Motors DEXRON® ATF Fluid Specifications GM6417M 1998
- General Motors HYDRA-MATIC 4L60-E Technician's Guide 1992
- Yu, J.F.S. Zakin, J.L. Patterson, G.K. “Mechanical Degradation of High Molecular Weight Polymers in Dilute Solution.” Journal of Applied Polymer Science 23 1979
- Marsalko, T.M. Majoros, I. Kennedy, J.P. “Multi-arm Star Polyisobutylenes. V. Characterization of Multiarm Polyisobutylene Stars by Viscometry, Pour Points, Electron Microscopy, and Ultrasonic Shear Degradation.” Journal of Macromolecular Science 34 5 1997
- Covitch M.J. “How Polymer Architecture Affects Permanent Viscosity Loss of Multigrade Lubricants” SAE Paper 982638 1998
- Covitch, M.J. Weiss, J. Kruetzer I. M. “Low Temperature Rheology of Engine Lubricants Subjected to Mechanical Shear: Viscosity Modifier Effects.” 11th International Colloquium on Industrial and Automotive Lubrication, Technische Akademie Esslingen Germany II 1998
- Miiller G.C. “The New Multi-Speed/Multi-Shear Tapered Bearing Simulator” Ninth International Conference on Viscosity of Automotive Lubricants 1993
- Johnston, G.J. Wayte, R. Spikes H.A. “The Measurement and Study of Very Thin Lubricant Films In Concentrated Contacts” Tribology Transactions. 34 2 187 1991
- Cann, P.M. Spikes H.A. “The Influence of Base Oil Rheology on the Behavior of VI Polymers in Concentrated Contacts” Tribology Series (Dissipative Processes in Tribology) 27 65 1994
- Cooper D. Moore A.J. “Application of the Ultra-Thin Elastohydrodynamic Oil Film Thickness Technique to the Study of Automotive Engine Oils” Wear 175 93 1994
- Hamrock, B.J. Dowson, D. “Isothermal Elastohydrodynamic Lubrication of Point Contacts” Trans., ASME 99 264 1977
- Macosko C. W. “Rheology: Principles, Measurements, and Applications” VCH Publishers, Inc. 1994
- Benfaremo N. Liu C. S. “Crankcase Engine Oil Additives” Lubrication 76 1990
- Rizvi S. Q. A. “Lubricant Additives and Their Functions” ASM Handbook 18 1992
- Webber R. “Low Temperature Rheology of Lubricating Mineral Oils: Effect of Cooling Rate and Wax Crystallization on Flow Properties of Base Oils” J. Rheol. 43 911 931 1999
- Wilkes J. “Fluid Mechanics for Chemical Engineers” Prentice Hall 1999