Abstract
In advanced automotive engines, especially in diesel engines, consumer demand for ever increasing service intervals for vehicles has led to longer oil drain periods. Consequently this has increased contamination levels in lubricating oils that will in turn reduce engine efficiency and increase the possibility of system failure due to increases in viscosity and the potential of oil starvation leading to scuffing and catastrophic failure of the engine. Therefore it is necessary to understand the effects of contaminants in diesel engine oil on the tribological performance of tribo-contacts and also the possible interaction between the contaminants. The paper aims to investigate the influence of contaminants and their interactions on diesel engine oil using Electro sensing (ES) monitoring. Using pin-on-disc (PoD) tribometer, all tests were carried out under ambient conditions at 5 m/s sliding speed and contact stress of 1.5–2.05 GPa to simulate a valve-train in a diesel engine with fully formulated heavy-duty diesel engine oil used as lubricant. In the first phase, using a parametric study examining the effect of four contaminants (soot, oxidation, moisture, and sulphuric acid) at varying levels (four for each) on steel-on-steel sliding contact. It was observed that all contaminants and contaminant levels reduce the conductivity of the oil. Oxidation and soot contaminants produced large increases in viscosity. The wear rate was mainly influenced by acid and soot additions, while the coefficient of friction was increased by all contaminants and contaminant levels. The steady-state charge levels changed for some contaminants. The best correlation of steady-state charge with the other measured tribological parameters of wear rate, friction, and temperature is seen for the series of oxidized oils. The multi-contaminated oil (L4× 4) shows remarkably little degradation in tribological performance. Analysis of the wear mechanisms shows that soot and oxidation produced abrasion and polishing wear, respectively, while sulphuric acid and moisture produced corrosive wear. In the second phase, investigates the effects of diesel contaminants and their interaction on tribological properties for bearing steel (En31) and ceramic (Si3N4) sliding contacts using a factorial study. The contaminants are soot, sulphuric acid, moisture and oxidation, and each contaminant has three different level of concentration (low, medium and high) in the test matrix. The factorial test matrix consisted of 20 tests, constructed from a quarter fractional factorial test matrix with four points at the medium values for the contaminants. Results from this matrix required six further tests to elucidate aliased pairs of interactions using Bayesian model selection. A pin-on-disc tribometer was used to carry out all the experiments. The factorial study showed that charge was influenced by tribo-couple material; the silicon nitride discs produced higher charge than steel discs. However, it was opposite for friction; the silicon nitride disc gave lower friction and the pins showed higher friction than their steel counterparts. For wear scar and temperature, soot contaminant was found to be important. The two important interactions were found for the charge response, with the interaction between sulphuric acid and pin material being more important than sulphuric acid–oxidation interaction. Similarly to charge, an interaction between sulphuric acid and pin material interaction was found for friction. To conclude, the ES monitoring was sensitive to the presence and levels of contaminants in diesel lubricating oil, particularly diesel soot. The change in charge levels indicated the concentration of soot level present in the contact, which was directly related to wear. ES monitoring also detected interactions between the contaminants through statistical analysis. ES monitoring has shown that monitoring lubricant performance and the effects of contamination are feasible under laboratory conditions.
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References
M. McNeely, ARES—Gas Engines for Today & Beyond. Diesel Gas Turbine Worldwide (2003)
D. Dowson, Piston assemblies; background and lubrication analysis, in Engine Tribology, Tribology Series, ed. by Taylor, (Elsevier, Amsterdam, vol. 26, 1993, Chap. 9), pp. 213–240
S.C. Tung, M.L. McMillan, Automotive tribology overview of current advances and challenges for the future. Tribol. Int. 37(2004), 517–536 (2004)
C.M. Taylor, Automobile engine tribology—design considerations for efficiency and durability. Wear 221(1), 1–8 (1998)
W.M. Needelman, P.V. Madhavan, Review of lubricant contamination and diesel engine wear. No. 881827. SAE technical paper (1988)
S. Aldajah et al., Effect of exhaust gas recirculation (EGR) contamination of diesel engine oil on wear. Wear 263(1–6), 93–98 (2007)
M. Gautam et al., Effect of diesel soot contaminated oil on engine wear—investigation of novel oil formulations. Tribol. Int. 32(12), 687–699 (1999)
D.R. Snelling et al., Particulate matter measurements in a Diesel engine exhaust by laser-induced incandescence and the standard gravimetric procedure. No. 1999-01-3653. SAE Technical paper (1999)
A.V. Oliver, Gear lubrication—a review. Proc. IMechE, Part J: J. Eng. Tribol. 216(5), 255–267 (2002)
M.F. Smiechowski, V.F. Lvovich, Electrochemical monitoring of water-surfactant interactions in industrial lubricants. J. Electroanal. Chem. 534(2), 171–180 (2002)
Y. Murakami, Analysis of corrosive wear of diesel engines: relationship to sulfate ion concentrations in blow by and crankcase oil. JSAE Rev. 16(1), 43–48 (1995)
S.K. Singh, A.K. Agarwal, D.K. Srivastava, M. Sharma, Experimental investigation of the effect of exhaust gas recirculation on lubricating oil degradation and wear of a compression ignition engine. ASME J. Eng. Gas Turbines Power 128, 921–927 (2006)
K. Akiyama, K. Manunaga, K. Kado, T. Yoshioka, Cylinder wear mechanism in an EGR equipped diesel engine and wear protection by engine oil. SAE paper 872158 (1987)
W.F. Bowman, G.W. Stachowiak, Determining the oxidation stability of lubricating oils using sealed capsule differential scanning calorimetry (SCDSC). Tribol. Int. 29(1), 27–34 (1996)
N. Gracia, S. Thomas, P. Bazin, L. Duponchel, F. Thibault-Starzyk, O. Lerasle, Combination of mid-infrared spectroscopy and chemometric factorization tools to study the oxidation of lubricating base oils. Catal. Today 155(3–4), 255–260 (2010)
B.K. Sharma, A.J. Stipanovic, Development of a new oxidation stability test method for lubricating oils using high-pressure differential scanning calorimetry. Thermochim. Acta 402, 1–18 (2003)
D.A. Green, R. Lewis, R.S. Dwyer-Joyce, Wear effects and mechanisms of soot-contaminated automotive lubricants. Proc. Inst. Mech. Eng. Part J: J. Eng. Tribol. 220(3), 159–169 (2006)
M. Masuko, A. Suzuki, T. Ueno, Influence of chemical and physical contaminants on the anti-wear performance of model automotive engine oil. Proc. IMechE, Part J: J. Eng. Tribol. 220(5), 455–462 (2006)
F.G. Rounds, Soots from used diesel-engine oils: their effects on wear as measured in 4-ball wear tests. SAE technical paper 810499 (1981)
T. Skurai, K. Yoshida, Tribological behaviour of dispersed phase systems, in: International Tribology Conference 1987, Melbourne, 2–4 Dec 1987: Preprints of Papers. Institution of Engineers, Australia (1987)
P.R. Ryason, I.Y. Chan, J.T. Gilmore, Polishing wear by soot. Wear 137(1), 15–24 (1990)
M. Ratoi et al., The influence of soot and dispersant on ZDDP film thickness and friction. Lubr. Sci. 17(1), 25–43 (2004)
Y. Olomolehin, R. Kapadia, H. Spikes, Antagonistic interaction of antiwear additives and carbon black. Tribol. Lett. 37(1), 49 (2010)
F.M. Salehi et al., Corrosive–abrasive wear induced by soot in boundary lubrication regime. Tribol. Lett. 63(2), 19 (2016)
W.M. Needleman, P.V. Madhavan, Review of lubricant contamination and Diesel engine wear, SAE paper 881827 (1988)
M.F. Smiechowski, V.F. Lvovich, Characterization of non-aqueous dispersions of carbon black nanoparticles by electrochemical impedance spectroscopy. J. Electroanal. Chem. 577(1), 67–78 (2005)
S. George et al., Effect of diesel soot on lubricant oil viscosity. Tribol. Int. 40(5), 809–818 (2007)
M. Kaneta et al., Effects of soot on wear in elastohydrodynamic lubrication contacts. Proc. Inst. Mecha. Eng. Part J J. Eng. Tribol. 220(3), 307–317 (2006)
D.A. Green, R. Lewis, R.S. Dwyer-Joyce, Wear effects and mechanisms of soot-contaminated automotive lubricants. Proc. Inst. Mech. Eng. Part J J. Eng. Tribol. 220(3), 159–169 (2006)
K. Kitamura, Y. Imada, K. Nakajima, Effect of soot introduced between sliding ceramic surfaces. Lubr. Eng. 49, 185–190 (1993)
Y. He et al., Grain-size dependence of sliding wear in tetragonal zirconia polycrystals. J. Am. Ceram. Soc. 79(12), 3090–3096 (1996)
R. Penchaliah et al., The effects of diesel contaminants on tribological performance on sliding steel on steel contacts. Proc. Inst. Mech. Eng. Part J J. Eng. Tribol. 225(8), 779–797 (2011)
K. Yadvendra, Master Thesis, IIT Madras (2018)
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Penchaliah, R. (2020). Tribological Effects of Diesel Engine Oil Contamination on Steel and Hybrid Sliding Contacts. In: Katiyar, J., Ramkumar, P., Rao, T., Davim, J. (eds) Tribology in Materials and Applications. Materials Forming, Machining and Tribology. Springer, Cham. https://doi.org/10.1007/978-3-030-47451-5_15
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