Abstract
Considerable prime global energy is used in the transport sector. Significant energy is lost to overcome the internal friction of engines in transport vehicles. Journal bearings are crucial tribo-pairs and passive components that cause energy loss. Frictional losses increase extensively during the warm-up period of an engine due to high lubricant viscosity. Recent tribological developments have shown that surface textures can be a potential solution to reduce friction. A numerical investigation is performed to evaluate the effect of surface texture on the frictional and lubrication performance of a journal bearing at varying thermal operating conditions in an internal combustion engine. Temperature variations during engine warm-up are considered with oil rheology to observe texture-based improvements. Surface texture substantially reduces frictional energy loss during engine warm-up. Eight different monograde and multigrade engine oils are considered, and consistency is observed in texture-based improved outcomes.
Highlights
Worldwide transportation of humans and goods consumes 20% of global primary energy; road vehicles account for 72% of this energy consumption [1]
A plain bearing is a crucial tribological component in internal combustion (IC) engines; it contributes to increasing energy energy losses were minimized with the use of surface textures [8]
These parameters are described mathematically as follows: Available studies and optimization of surface texture results obtained by the authors of this study revealed that the area density (Sp ) and the aspect ratio (ε) are important parameters
Summary
Worldwide transportation of humans and goods consumes 20% of global primary energy; road vehicles account for 72% of this energy consumption [1]. Crankshaft bearings, piston ring–liner, piston skirt–liner, journal and thrust bearings, and cam–follower are some examples of such contacts These machine components are widely used in numerous engineering applications aside form IC engines, thereby emphasizing the importance of understanding the effects of modern surfaces on the tribological performance of these contacts. Tribo-interfaces in an IC engine experience high-frequency fluctuating thermal and structural loads Studies of such interfaces provide insight into the tribological performance of a wide-range of contacts in considerable applications. A plain bearing is a crucial tribological component in IC engines; it contributes to increasing energy energy losses were minimized with the use of surface textures [8] Such studies are rarely losses at cold temperatures [3].
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