This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Contribution of Soot Contaminated Oils to Wear-Part II
Technical Paper
1999-01-1519
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Diesel soot interacts with the engine oil and leads to wear of engine parts. Engine oil additives play a crucial role in preventing wear by forming the anti-wear film between the wearing surfaces. The current study was aimed at investigating the interactions between engine soot and oil properties in order to develop high performance oils for diesel engines equipped with exhaust gas re-circulation (EGR).
The effect of soot contaminated oil on wear of engine components was examined using a statistically designed experiment. To quantitatively analyze and simulate the extent of wear a three-body wear machine was designed and developed. The qualitative wear analysis was performed by examining the wear scars on an AISI 52100 stainless steel ball worn in the presence of oil test samples on a ball-on-flat disc setup. The three oil properties studied were base stock, dispersant level and zinc dithiophosphate level. Base stocks referred to as base oil#1 and base oil#2 were studied, while the other two variables were studied at two levels: High (1) and Low (-1). This resulted in a 23 matrix (8 oil blends). The effect of soot was also studied and this resulted in a 24 factorial experiment.
Results gave a clear indication that the oil's anti-wear properties were reduced in the presence of diesel soot, which could be because of an abrasive wear mechanism. The results obtained from the statistical analysis using the general linear model (GLM) procedure of the statistical analysis system package (SAS) gave a clear indication that the base stock, and dispersant level were significant on an oil's wear performance, while the effect of zinc dithiophosphate was negligible within the range of concentrations tested. The results from the ball-on-flat-disc tests showed that the wear scar diameter of soot was comparable with the wear scar diameter of alumina, which is a known abrasive, thus indicating that wear due to soot occurred due to abrasion. Further, the EDAX tests done on a soot sample indicated that there was no adsorption of anti-wear agents by the soot.
Recommended Content
Authors
Topic
Citation
Gautam, M., Chitoor, K., Balla, S., and Keane, M., "Contribution of Soot Contaminated Oils to Wear-Part II," SAE Technical Paper 1999-01-1519, 1999, https://doi.org/10.4271/1999-01-1519.Also In
References
- Benzing, R. Goldblatt, I. Hopkins, V. Jamison, W. Mecklenburg, K. Peterson, M. 1976 “FRICTION AND WEAR DEVICES” American Society of Lubrication Engineers
- Berbeizer, I. Martin, J. Kapsa, Ph. 1986 “The Role of Carbon in
- Lubricated Mild Wear” CNRS France June 1986
- Cabrera, C. Franco, H. Torres, N. 1992 “Study of Wear Mechanisms and Characteristics of Coating Films on the FALEX Block-on-Ring Tester Using SEM and EDAX” SAE 922349
- Cadman, W. Johnson, J. 1986 “The Study of the Effect of Exhaust Gas Re-circulation on Engine Wear in a Heavy-Duty Diesel Engine Using Analytical Ferrography” SAE 860378
- Corso, S. Adamo, R. 1984 “The Effect of Diesel Soot on Reactivity of Oil Additives and Valve Train Materials” SAE 841369
- Gautam, M Durbha, M Chitoor, K Jaraiedi, M Mariwalla, N Ripple, D “Contribution of Soot Contaminated Oils to Wear” SAE 981406
- Herzog, P. Bugler, L. Winklhofer, E. Zelenka, P. Cartellieri W. 1992 “NO x Reduction Strategies for DI Diesel Engines” SAE 920470
- Kawamura, M. Ishiguro, T. Morimoto, H. 1987 “Electronic Microscopic Observation of Soots in Used Diesel Engine Oils” Lubrication Engineering July 1987
- Kim, C. Passut, C. Zang, D. 1992 “Relationships Among Oil Composition Combustion-Generated Soot, and Diesel Engine Valve Train Wear” SAE 922199
- Lowenthal, D. Gautam, M. Neuroth G. 1994 “Characterization of Heavy-Duty Diesel Vehicle Emissions Atmospheric Environment 28 4 731 743 1994
- Lubrizol 1991 “Ready Reference for Lubricant and Fuel Performance”
- Murali, D. 1997 “Effect of Diesel Soot Contaminated Oil on Engine Wear Investigation of Novel Oil Formulations” West Virginia University Morgantown, WV
- Nagai I. Endo, H. Nakamura H. Yano, H. 1983 “Soot and Valve Train Wear in Passenger Car Diesel Engines” SAE 831757
- Neale M. 1973 “TRIBOLOGY HANDBOOK” Butterworths London
- Needelman W. Madhavan, P. 1988 “Review of Lubricant Contamination and Diesel Engine Wear” SAE 881827
- Rounds, F.G. 1977 “Carbon: Cause of Diesel Engine Wear?” SAE 770829
- Rounds, F.G. 1981 “Soots from Used Diesel Engine Oils-Their Effects on Wear as Measured in 4-Ball Wear Tests” SAE 810499
- Ryason, P.R. Chan, I. Gilmore, J. 1990 “Polishing Wear by Soot” Wear 137 15 24 1990
- Ryason P.R. Hillyer, M.J. Hansen, T.P. 1994 “Infrared Absorptivities of Several Diesel Engine Soots; Application to the Analysis of Soot in Used Engine Oils” SAE 942030