This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Vapor Phase Tribology for Advanced Diesel Engines
Annotation ability available
Sector:
Language:
English
Abstract
Delivery of a lubricant as a vapor mixed with a carrier gas provides a method of controlling the delivery rate of the lubricant. Temperatures in the range of 370 to 800 C are high enough to produce a lubricating film from tricresyl phosphate [TCP] vapor delivered in nitrogen as a carrier gas. The solid film lubricant formed by this delivery system provides excellent lubrication for a four-ball wear tester run at 370 °C. Deposit rates are compared for TCP vapor delivered lubrication over a temperature range using stainless steel and quartz surfaces. The deposit rate is sensitive to TCP concentration in the carrier gas. The deposit rates of the TCP decomposition products versus time are reported.
Having been demonstrated in laboratory tests, the Vapor Phase [VP] concept is being pursued for hot section lubrication of the advanced (low heat rejection) diesel engines. An advanced cylinder kit, the Separated Ring Belt [SRB] concept isolates the hot combustion area from the side-force region of a conventional piston. The SRB hot zone is treated with VP tribology.
Conceptual studies and preliminary analysis examine the potential of the VP concept for engine lubrication. A tribotester has been adapted for testing of VP under simulated engine conditions. The strategy of the advanced diesel engine VP tribology approach, current status, and future plans are reported.
Authors
Topic
Citation
Klaus, E., Duda, J., Jeng, G., Makim, N. et al., "Vapor Phase Tribology for Advanced Diesel Engines," SAE Technical Paper 890889, 1989, https://doi.org/10.4271/890889.Also In
References
- Hsu S.M. Klaus E.E. “Estimation of Molecular Junction Temperatures in Four-Ball Contacts by Chemical Reaction Rate Studies,” ASLE Trans. 21 3 201 10 1978
- Shafrin E.G. Murday J.S, “An Analytical Approach to Ball Bearing Surface Chemistry,” J. Vac. Sci. Technology 14 246 1977
- Shafrin E.G. Murday J.S. “Auger Compositional Analysis of Ball Bearing Steels Reacted with Tricresyl Phosphate,” ASLE Trans. 21 4 329 36 1978
- Faut O.D. Wheeler D.R. “On the Mechanism of Lubrication by Tricresyl Phosphate (TCP) - The Coefficient of Friction as a Function of Temperature for TCP on M50 Steel,” ASLE Trans. 26 3 344 50 1983
- Godfrey D. “The Lubrication Mechanism of Tricresyl Phosphate on Steel,” ASLE Trans. 8 1 1 11 1965
- Yaraamato Y. Hirano F. “Electrical Behavior of Phosphate Esters,” Wear 50 349 355 1978
- Yamamato Y. Hirano F. “Effect of Different Phosphate Esters on Frictional Characteristics,” Tribology 165 69 August 1980
- Gauthier A. Montes H. Georges J.M. “Boundary Lubrication with Tricresyl Phosphate (TCP) - Importance of Corrosive Wear,” 25 4 445 55 1982
- Klaus E.E. Lai C.W. “Vapor Deposited Lubricants for Extreme Conditions,” ASLE Sp. Pub, 15 “Solid and Liquid Lubricants for Extreme Environments,” 75 9 1983
- Klaus E.E. Lai C. W. “Method of Die Casting Metals,” U.S. Patent 3978908 1976
- Pinto N.D.G. Duda J.L. Graham E.E. Klaus E.E. “In Situ Formation of Solid Lubricating Films from Conventional Mineral Oil and Ester Base Lubricants,” ASLE Proceedings, 3rd International Conference on Solid Lubrication 94 104 1984
- Graham E.E. Klaus E.E. “Lubrication from the Vapor Phase at High Temperatures,” ASLE Trans. 29 2 229 34 1985