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Study of Viscosity Index Improver for Fuel Economy ATF
Technical Paper
2003-01-3256
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
One very effective way to improve fuel economy of motor vehicles is to reduce the viscosity of the automatic transmission fluid (ATF). However, viscometric constraints often exist for a particular ATF application. The proper choice of viscosity index (VI) improver allows viscosity reduction at lower temperatures, while maintaining viscosity at higher temperatures. This study shows that molecular weight of a VI improver is a key factor to achieve high thickening efficiency, improved shear stability and limited metal fatigue failure simultaneously. Based on this study, an optimum VI improver has been found and a new fuel economy ATF was developed.
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Citation
Umamori, N. and Kugimiya, T., "Study of Viscosity Index Improver for Fuel Economy ATF," SAE Technical Paper 2003-01-3256, 2003, https://doi.org/10.4271/2003-01-3256.Also In
References
- Kugimiya, T. Yoshimura, N. Kuribayashi, T. Mitsui, J. Ueda, F. Ando, Y. Nakada, T. Ohira, H. “Next Generation High Performance ATF for Slip-Controlled Automatic Transmission,” SAE Paper 972927
- Faure, D. Hipeaux, J. C. “Comparative Study of Properties and Behavior of Various Polymer Additives for Manual Gear Box Lubricants,” SAE Paper 2000-01-2028
- Yoshida, K. Hosonuma, K. Sakurai, T. “Behavior of Polymer-thickened Oils in Lubricated Concentrated Contact,” Wear 98 63 1984
- Furey, M. J. Appeldoorn, J. K. “The Effect of Lubricant Viscosity on Metallic Contact and Friction in a Sliding System,” ASLE Transaction 5 149 1962
- Skurka, J. C. “Elastohydrodynamic Lubrication of Rooler Bearings,” ASME Journal of Lubrication Technology 92 2 281 1970
- 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 System,” SAE Paper 952348