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The Classification of Lubricating Oil Contaminants and Their Effect on Wear in Diesel Engines as Measured by Surface Layer Activation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1995 by SAE International in United States
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As a lubricating oil deteriorates with use, contaminants in the oil build up over time. These contaminants include both chemical constituents such as oil oxidation products and acids due to combustion gases and particulate constituents such as dust and dirt from external sources, wear metal debris, and combustion soot A series of tests were conducted in a test cell to separate these categories of contaminants as much as possible and measure their effect on engine wear using Surface Layer Activation (SLA). A top piston ring, the corresponding cylinder liner and a sliding tappet cam follower were irradiated and the SLA measurements using the direct or marker method were carried out while the engine was running at close to full rated load and speed. In the absence of external contamination, it was found that organic contaminants and wear metals that built up over 200 hours of operation without oil filtration had no effect on wear of the irradiated parts. However, the unfiltered organic contamination caused the viscosity of the oil to dramatically increase. Low concentrations of graded SAE fine test dust was added to the sump in various concentrations to determine the effect of hard particle size and concentration. The quantitative relationship between particle size and concentration and wear rate was then determined and compared for different diesel engine families.
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CitationTruhan, J., Covington, C., and Wood, L., "The Classification of Lubricating Oil Contaminants and Their Effect on Wear in Diesel Engines as Measured by Surface Layer Activation," SAE Technical Paper 952558, 1995, https://doi.org/10.4271/952558.
- Hannum, A. K. “Radioactive Tracers in Engine Research - The Effect of Piston Ring Rotation on Side Wear Rate,” Thompson Products Engineering Bulletin 1 2 April 1956 1
- Blatchley, C. Sioshansi, P. “Monitoring Wear with Gamma Rays,” Machine Design Oct. 1990 99
- Truehaft, M. “The Use of Radioactive Tracer Technology to Measure Engine Ring Wear in Response to Dust Ingestion,” SAE 930019 1993
- 1991 SAE Handbook Society of Automotive Engineers Warrendale, PA 3 151
- Anderson, D. R. Hubert, C. J. Johnson, J. H. “Advances in Quantitative Analytical Ferrography and the Evaluation of a High Gradient Magnetic Separator for the Study of Diesel Engine Wear,” SAE 821194 Society of Automotive Engineers Warrendale, PA 1982
- Ryason, P. R. Chan, I. Y. Gilmore, J. T. “Polishing Wear by Soot,” Wear 137 1990 15
- Stehouwer, D. M. Hudgens, R. D. “Coolant Contamination of Diesel Engine Oils,” SAE 870645 Society of Automotive Engineers Warrendale, PA 1987
- Hudgens, R. D. Feldhaus, L. B. “Diesel Engine Lube Filter Life Related to Oil Chemistry,” SAE 780974 Society of Automotive Engineers Warrendale, PA 1978
- Stehouwer, D. M. personal communications to be published
- Truhan, J. J. Covington, C. B. “,The Use of Direct Method Surface Layer Activation to Measure Wear in a Diesel Engine,” SAE 931627 Society of Automotive Engineers Warrendale, PA 1993
- Truhan, J. “Effect of Filtration on Top Ring Face Wear in Heavy Duty Diesel Engines,” Fourth International Symposium on the Performance Evaluation of Automotive Fuels and Lubricants Coordinating European Council May 1993
- Truhan, J. J. Covington, C. B. Colerico, C. Blatchley, C. “Surface Layer Activation for Wear Studies,” Applications of Nuclear Chemistry Symposium, 207th American Chemical Society Meeting March 1994 Plenum Press