This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effects of Water on Cellulose-Based Frictional Surfaces in Automatic Transmission Clutch Plates
Annotation ability available
Sector:
Language:
English
Abstract
A bench scale apparatus and accelerated test protocol were developed to evaluate the effect of contamination of automatic transmsission fluid by mg/kg levels of water on cellulose frictional clutch surfaces. The testing indicated that water added at levels as low as 600 mg/kg migrated to the surface of untreated paper frictionals and contributed to loss of the paper coating and erratic torque transfer properties. Treated, “high performance” paper frictional surfaces showed less physical damage but the same torque transfer effects from water contaminated ATF. A mechanism of the water coating, swelling and weakening the hydrophillic cellulose fibers, with subsequent destruction due to hydrodynamic shear was proposed.
Recommended Content
Authors
Citation
Williamson, W. and RhodILLEGIBLE, B., "The Effects of Water on Cellulose-Based Frictional Surfaces in Automatic Transmission Clutch Plates," SAE Technical Paper 961917, 1996, https://doi.org/10.4271/961917.Also In
References
- Raybestos Products Company A little water can't hurt anything or can it? Product Information Bulletin November 15 1991
- General Motors Corporation DEXRON ® III Automatic Transmission Fluid Specification April 1993
- Ford Motor Compnay MERCON ® Automatic Transmission Fluid Specification September 1992
- SAE Paper 910745 Rogers Charles H Post Barry L Caterpillar, Inc Frictional Performance Test for Transmission and Drive Train Oils
- SAE Paper 902150 Nakada T Nomura T Yoshioka T Nonoyama M Toyota Motor Corporation A Study of Additive Effects on ATF Frictional Porperties Using New Test Methods
- SAE Paper 902146 Stebar Russell F Davison Ellard D Linden James L General Motors Research Laboratories Determining Frictional Performance of Automatic Transmission Fluids in a Band Clutch
- SAE Paper 902147 Castanien Cristian J The Lubrizol Corporation Control of Band/Drum Interface Temperature in Automatic Transmissions and the Impact Upon Friction System Durability
- SAE Paper 890721 Papay Adnrew G Hartley Rolfe J Ethyl Petroleum Additives, Incorporated Frictional Response of Automatic Transmission Fluids in Band and Disc Clutches
- Slough C G Everson M P Jaklevic R. C Melotik D J Ford Motor Company Shen W Eastern Michigan University Clutch Shudder Correlated to ATF Degradation through Local Friction vs Velocity Measurements by a Scanning Force Microscope Tribology Transactions 39 3 July 1996
- SAE Paper 881674 Miyazaki M Hoshino M Evaluation of Vibration-Preventative Properties of Lubricating Oils in Wet Friction Plates and Retention of Such Properties Using a Friction Tester