Effects of Nano-Lubricants on Power and CO Emission of a Diesel Engine: An Experimental Investigation

In this study, it was aimed to investigate the effects of copper (II) oxide (CuO), copper zinc iron oxide (CuZnFe2O4) and copper iron oxide (CuFe2O4) nanoparticle additives in synthetic diesel engine oil (5W-40) at the fraction of 0.08 wt% on friction and wear in piston ring-cylinder liner mechanism of the engine. In this regard, Scanning Electron Microscope (SEM) analyses of the nanoparticles were first carried out and via a linear reciprocating tribometer, friction coefficients were determined on specimens comprised of the same material with real engine piston ring. Subsequently, SEM analyses of the samples exposed to abrasion were carried out to investigate the wear characteristics. In the second stage of the experimental study, oil sump of the diesel test engine was filled with raw oil (oil without nano additives) and prepared nano oils (oil+nano additives) separately to unravel the effects of the lubricants on engine power and carbon monoxide (CO) emissions. According to the results, it was determined that CuZnFe2O4 nano lubricant was the most pronounced of all in terms of tribological performance, engine power and CO emissions. The results depicted that, in the best case, an average increment of 15% in engine power and an average reduction of 18% in CO emissions with CuZnFe2O4 nano oil were provided compared to that of the raw oil.

Keywords:

engine oil, Emission, nano additive, performance tribology,

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1. Lee, K, Hwang, Y, Cheong, S, Choi, Y, Kwon, L, Lee, J, Kim, S.H. 2009. Understanding the role of nanoparticles in nano-oil lubrication. Tribology Letters; 35(2): 127–131.
2. Liu, G, Li, X, Qin, B, Xing, D, Guo, Y, Fan, R. 2004. Investigation of the mending effect and mechanism of copper nano-particles on a tribologically stressed surface. Tribology Letters; 17(4): 961–966.
3. Tao, X, Jiazheng, Z, Kang, X. 1996. The ball-bearing effect of diamond nanoparticles as an oil additive. Journal of Physics D: Applied Physics; 29(11): 2932–2937.
4. Padgurskas, J, Rukuiza, R, Prosyčevas, I, Kreivaitis, R. 2013. Tribological properties of lubricant additives of Fe, Cu and Co nanoparticles. Tribology International; 60: 224–232.
5. Tarasov, S, Kolubaev, A, Belyaev, S, Lerner, M, Tepper, F. 2012. Study of friction reduction by nanocopper additives to motor oil. Wear; 252(1–2): 63–69.
6. Yu, H, Xu, Y, Shi, P.J, Xu, B.S, Wang, X.L, Liu, Q, Wang, H.M. 2008. Characterization and nano-mechanical properties of tribofilms using Cu nanoparticles as additives. Surface and Coatings Technology; 203(1–2): 28–34.
7. Choi, Y, Lee, C, Hwang, Y, Park, M, Lee, J, Choi, C, Jung, M. 2009. Tribological behavior of copper nanoparticles as additives in oil. Current Applied Physics; 9(2): 124–127.
8. Ali, M.K.A, Xianjun, H, Mai, L, Bicheng, C, Turkson, R.F, Qingping, C. 2016. Reducing frictional power losses and improving the scuffing resistance in automotive engines using hybrid nanomaterials as nano-lubricant additives. Wear; 365, 270–281.
9. Padgurskas, J, Rukuiza, R, Prosyčevas, I, Kreivaitis, R. 2013. Tribological properties of lubricant additives of Fe, Cu and Co nanoparticles. Tribology International; 60: 224–232.
10. Ali, MKA, Fuming, P, Younus, HA, Abdelkareem, MAA, Essa, FA, Elagouz, A, Xianjun, H. 2018. Fuel economy in gasoline engines using Al2O3/TiO2 nanomaterials as nanolubricant additives. Applied Energy; 211: 461-478.
11. Suryawanshi, SR, Pattiwar, JT. 2018. Effect of TiO2 nanoparticles blended with lubricating oil on the tribological performance of the journal bearing. Tribology in Industry; 40(3): 370-391.
12. Zin, V, Agresti, F, Barison, S, Colla, L, Gondolini, A, Fabrizio, M. 2013. The synthesis and effect of copper nanoparticles on the tribological properties of lubricant oils. Nanotechnology; 12: 751–759.
13. Bi, S, Guo, K, Liu, Z, Wu, J. 2011. Performance of a domestic refrigerator using TiO2-R600a nano-refrigerant as working fluid. Energy Conversion Management; 52: 733–737.
14. Xing, M, Wang, R, Yu, J. 2014. Application of fullerene C60 nano-oil for performance enhancement of domestic refrigerator compressors, International Journal of Refrigeration; 40: 398–403.
15. Podgornika, B, Vizintina, J, Jacobsonb, S, Hogmarkb, S. 2004. Tribological behaviour of WCyC coatings operating under different lubrication regimes. Surface and Coatings Technology; 177–178: 558-565.
16. Ali, MKA, Fuming, P, Younus, HA, Abdelkareem, MAA, Essa, FA, Elagouz, A, Xianjun, H. 2018. Fuel economy in gasoline engines using Al2O3/TiO2 nanomaterials as nanolubricant additives. Applied Energy; 211: 461-478.
17. Ali, MKA, Xianjun, H, Abdelkareem, MAA, Gulzar, M, Elsheikh, AH. 2018. Novel approach of the graphene nanolubricant for energy saving via antifriction/ wear in automobile engines. Tribology International; 124: 209-229.
18. ASTM D-445, Standard test method for kinematic viscosity of transparent and opaque liquids, American Society for Testing and Materials. https://www.astm.org/Standards/D445 (accessed at 15.04.2018).
19. Zhang, S, Hu, L, Feng, D, Wang, H. 2013. Anti-wear and friction-reduction mechanism of Sn and Fe nanoparticles as additives of multialkylated cyclopentanes under vacuum condition. Vacuum; 87: 75–80.
20. Arumugam, S, Sriram, G. 2013. Preliminary study of nano- and microscale TiO2 additives on tribological behavior of chemically modified rapeseed oil. Tribology Transactions; 56(5): 797–805.
21. Krishna Sabareesh, R, Gobinath, N, Sajith, V, Das, S, Sobhan, C. B. 2012. Application of TiO2 nanoparticles as a lubricant-additive for vapor compression refrigeration systems: an experimental investigation. International Journal of Refrigeration; 35(7): 1989–1996.
22. Ali, M.K.A, Xianjun, H. 2015. Improving the tribological behavior of internal combustion engines via the addition of nanoparticles to engine oils. Nanotechnology Reviews; 4(4): 347–358.
23. Ali, M.K.A, Xianjun, H, Turkson, R.F, Ezzat, M. 2015. Analytical study of tribological parameters between piston ring and cylinder liner in internal combustion engines. Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics; 230(4): 329-349.
24. Blau, P.J. 2001. A review of sub-scale test methods to evaluate the friction and wear of ring and liner materials for spark and compression ignition engines. National Laboratory Technical Report, Tennessee, USA.