Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science ( IF 2 ) Pub Date : 2021-11-29 , DOI: 10.1177/09544062211055352 Gurtej Singh 1 , Mohammad Farooq Wani 1 , Mohammad Marouf Wani 1
Friction and wear are the main causes of energy dissipation in automotive engines. To minimize the frictional power losses, it is extremely important to improve the tribological characteristics of ring/liner assembly which accounts for almost 40–50% frictional power losses. The present study attempts to mitigate friction and wear of the ring/liner tribo-pair using GNP/SAE 15W40 nano-lubricant. To simulate the ring/liner interface, the tribological performance of nano-lubricants was assessed using a tribometer based on ASTMG181 standard under various operating conditions. The coefficient of friction (COF) and wear rate lowered using graphene nano-lubricants (GNL). The tribological results showed that friction coefficient, wear rate, and surface roughness of piston ring improved in the range 17.71%–42.33%, 25%–40.62%, and 61%, respectively, under GNL lubricating conditions during the boundary lubrication. Further, the characterization of wear tracks of piston ring and cylinder liner confirmed tribo-film formation on worn surfaces resulting in decreased COF and wear rate.
中文翻译:
使用 GNP 作为润滑油添加剂的汽车发动机活塞环/气缸套组件的摩擦学评估
摩擦和磨损是汽车发动机能量耗散的主要原因。为了最大限度地减少摩擦功率损失,改善环/衬套组件的摩擦学特性非常重要,因为摩擦功率损失几乎占 40-50%。本研究尝试使用 GNP/SAE 15W40 纳米润滑剂减轻环/衬套摩擦副的摩擦和磨损。为了模拟环/衬里界面,使用基于 ASTMG181 标准的摩擦计在各种操作条件下评估纳米润滑剂的摩擦学性能。使用石墨烯纳米润滑剂 (GNL) 降低了摩擦系数 (COF) 和磨损率。摩擦学结果表明,活塞环的摩擦系数、磨损率和表面粗糙度分别提高了 17.71%~42.33%、25%~40.62% 和 61%,在边界润滑期间的 GNL 润滑条件下。此外,活塞环和气缸套磨损轨迹的表征证实了磨损表面上的摩擦膜形成,导致 COF 和磨损率降低。