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Oil-Friction Material Interaction and the Effects of Conditions of Use
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English
Abstract
The literature provides considerable evidence confirming interaction of oil and friction material on performance characteristics obtained in a wet friction unit. Both elements can be modified to meet a wide range of requirements. Furthermore, it is well established that the performance obtained with any specific oil-material combination can be modified with usage. In this report, additional evidence of interaction is offered from test of five friction materials and five oil types. How the interactions are affected by conditions of use is also explored. Data on variable energy loading, power loading, oil sump temperature, oil flow, and sump volume factors are included, not only as a design guide on methods of eliminating or minimizing performance fluctuations resulting from such interactions, but also to demonstrate the kind of variable that can produce the chemical and/or physical change of sufficient magnitude to modify results. Also demonstrated is the fact that the effects of such conditions of use are not necessarily consistent and that trends produced by a variable may be different for each oil-friction material system. It is implied that further study of such variables is required to permit scientific selection of the optimum combination for any specific design.
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Citation
Fish, R., "Oil-Friction Material Interaction and the Effects of Conditions of Use," SAE Technical Paper 740655, 1974, https://doi.org/10.4271/740655.Also In
References
- Newingham T. D. “Automatic Transmission Fluid-Component Effect on Friction.” Paper 774A SAE National Fuels and Lubricants Meeting Tulsa October 1963
- Friihauf E. J. “Automatic Transmission Fluids-Some Aspects on Friction.” Paper 740051 SAE Automotive Engineering Congress Detroit February 1974
- Haviland M. L. Rodgers J. J. “Frictional Characteristics of Automatic Transmission Fluids.” Lubrication Engineering 17 3 March 1961
- Liddell G. J. Newingham T. D. “Some Physical Effects of Transmission Fluid Degradation.” SAE Transactions 75 1966 paper 660097
- Nibert R. K. Albertson C. E. “Wet Clutch Lining-Lubricant Additive Interactions.” Paper 740052 SAE Automotive Engineering Congress Detroit February 1974
- Anderson A. E. “Friction and Wear of Paper Type Wet Friction Elements.” Paper 720521 SAE National Automobile Engineering Meeting Detroit May 1972