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Proposal of New Criteria and Test Methods for the Dynamic Performance of ATF
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English
Abstract
Recently in the world, many modifications and improvements have been taking place in automatic transmission fluid (ATF) in order to get more excellent performance and durability of automatic transmission.
The most important criterion for the improvement of ATF is a superior friction characteristic. To consider the performance of ATF, we have investigated the correlation of criteria between actual vehicle tests and bench-scale tests (e.g. SAE#2 Friction Test). And it was proved that conventional criteria and test methods for bench-scale tests were not enough to give best prediction of actual vehicle performance especially for shift quality, anti-shudder performance and static torque capacity which were regarded as of major importance for the development.
Based on the findings, we have considered new criteria and test methods for the frictional characteristics, and specific requirements for ATF have been proposed from the standpoint of actual vehicle performance.
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Citation
Yoshizawa, K., Akashi, T., and Yoshioka, T., "Proposal of New Criteria and Test Methods for the Dynamic Performance of ATF," SAE Technical Paper 900810, 1990, https://doi.org/10.4271/900810.Also In
References
- 1988 GROBAL PERSPECTIVES Lubrizol Petroleum Chemicals Company
- DEXRON®-II Automatic Transmission Fluid Specification Genaral Motors Corporation Second 1978
- A Specification For MERCON® Automatic Transmission Fluid The Ford Motor Company 1987
- Nakata H. et a1. Prediction of the Life of Friction Material and Shift Quality of an Automatic Transmission SAE Paper 860385
- Nakamura S. et a1. TOYOTA EC-HYMATIC-A New Full Time 4WD System for Automatic Transmission SAE Paper 890526
- Watanabe N. “Present Status and Future of Lubricating Oils for Automotive Power-Train” “JUNKATSU” 33 11 1988
- Hiramatsu T. et a1. Control Technology of Minimal Slip-Type Torque Converter Clutch SAE Paper 850460