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http://dx.doi.org/10.9725/kts.2021.37.6.246

Experimental Study of Tribological Properties According to Oil Grade  

Lee, Jong-Ho (Graduate School, Dept. of Mechanical Engineering, Yonsei University)
Seo, Kuk-Jin (Graduate School, Dept. of Mechanical Engineering, Yonsei University)
Hwang, Youn-Hoo (Graduate School, Dept. of Mechanical Engineering, Yonsei University)
Han, Jae-Ho (Graduate School, Dept. of Mechanical Engineering, Yonsei University)
Kim, Dae-Eun (Dept. of Mechanical Engineering, Yonsei University)
Publication Information
Tribology and Lubricants / v.37, no.6, 2021 , pp. 246-252 More about this Journal
Abstract
Among the engine components of an internal combustion engine, the valve train is a series of systems that supply intake gas to the combustion chamber and operate intake and exhaust valves that discharge exhaust gas. If excessive wear occurs in the valve train system, the suction and exhaust valves do not open and close on time, which leads to abnormal combustion and exhaust gas. In this study, we conduct experiments and analyses on friction and wear characteristics of the valve train system. Moreover, we experimentally study the correlation between the pinball and pinball cap on engine oil lubrication, friction experiment, wear amount analysis, and surface analysis. Specifically, we experiment using Ball on reciprocating tribo-tester and apply commercial engine oil sold on the market engine oil. We construct the experimental conditions for each new oil and oil. Accordingly, the completed specimen was subjected to a confocal microscope to check the wear volume, observe the surface of the specimen, and confirm the elemental components using a scanning microscope (SEM) and an energy dispersion X-ray spectrometer (EDS). Through this experiment, we analyze the friction and wear characteristics of valve train components according to engine oil grade, and the obtained data serve as an effective engine oil management method.
Keywords
valve train; friction; wear; oil grade; tribo-film;
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