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FTIR analysis and monitoring of used synthetic oils operated under similar driving conditions

Friction 2020年第5期8卷 995-1006页

作者： Artur WOLAK Wojciech KRASODOMSKI Grzegorz ZAJAC Department of Quality and Safety of Industrial Products Institute of Quality and Product Management SciencesCracow University of EconomicsKraków 30-033Poland Department of of Petroleum Analyses Oil and Gas Institute—National Research InstituteKraków 31-503Poland Department of Power Engineering and Transportation Faculty of Production EngineeringUniversity of Life Sciences in LublinLublin 20-612Poland

The processes of degradation of engine oils operated in passenger cars of a uniform fleet of 25 vehicles were analyzed for oxidation content using infrared (IR) spectroscopy. As part of the experiment, the changes in engine oils occurring during actual operation (under conditions which can be described as "harsh", i.e., short distance driving, frequent starting of the engine, and extended engine idling) have been observed. An evaluation of the Fourier transform infrared spectroscopy (FTIR) spectrum of an engine oil sample was presented. The infrared spectra of both fresh and used oils were recorded with the Thermo Nicolett IS5. The tests were conducted according to the Appendix A2 of ASTM 2412. For the used engine oil differentiation process, FTIR spectra were analyzed in the regions of 1,700–2,000 cm-1 and 3,600–3,700 cm-1. The FTIR spectrometry is demonstrated to be effective for the analysis and monitoring of processes of oxidation and shown to provide rapid and accurate information relating to the aging process of engine oils. The results may facilitate decision-making regarding the service life of engine oils. The achieved dependencies can make it possible to upgrade the sensor assembly consisting of an FTIR source.

关键词： Fourier transform infrared spectroscopy(FTIR) reliability modelling oil condition monitoring oil oxidation oil change interval

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