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Experimental research on the frictional performance of real laser-textured cylinder liner under different lubrication conditions
International Journal of Engine Research ( IF 2.5 ) Pub Date : 2021-02-18 , DOI: 10.1177/1468087421995293
Bifeng Yin 1 , Bo Xu 1 , Hekun Jia 1 , Xijun Hua 2 , Yonghong Fu 2
Affiliation  

Laser surface texturing technology including the steps of surface pre-processing, laser texturing, and surface post-polishing was utilized to process typical micro-dimples(diameter 50 μm, depth 8 μm, and area ratio 10%) on the cylinder liner surface in a production engine. By conducting the reciprocating friction tests on a friction-wear tester, the instantaneous friction force of the real cylinder liner-piston ring pair was measured for comparing the tribological performance of plateau-honed cylinder liner and laser-textured cylinder liner. The testing results showed that under different lubrication conditions, laser texturing cylinder liner could effectively reduce the friction force, especially the peak force around the reciprocating stroke ends of ring/liner pair. Within a reciprocating stroke, the average friction coefficients of the laser-textured cylinder liner-piston ring pair decrease by approximately 18.6%–37.6% under low temperature oil bath condition dominated by hydrodynamic lubrication, while the friction coefficients decrease by approximately 1.8%–6.1% under high temperature oil bath condition dominated by mixed lubrication compared with these of the plateau-honed cylinder liner-piston ring pair. This indicates that laser texturing cylinder liner with appropriate micro structures could enhance the hydrodynamic effects and reduce the friction of ring/liner system, which is conducive to improving the engine mechanical efficiency and the application of low-friction design on production engine.



中文翻译:

真实激光纹理气缸套在不同润滑条件下摩擦性能的实验研究

激光表面纹理化技术包括表面预处理,激光纹理化和表面后抛光步骤,用于加工气缸衬套表面上的典型微凹痕(直径50μm,深度8μm和面积比10%)。生产引擎。通过在摩擦磨损测试仪上进行往复摩擦测试,测量了实际气缸套-活塞环对的瞬时摩擦力,以比较高原磨耗式气缸套和激光纹理化气缸套的摩擦学性能。测试结果表明,在不同的润滑条件下,激光纹理化的气缸套可以有效地减小摩擦力,尤其是在环/缸套对往复行程端附近的峰值力。在往复行程内,在以水动力润滑为主的低温油浴条件下,激光织纹的气缸套-活塞环对的平均摩擦系数降低了约18.6%–37.6%,而在高温机油条件下,摩擦系数降低了约1.8%–6.1%与高原磨合的缸套-活塞环对相比,混合条件下的熔池状态更为重要。这表明具有适当微观结构的激光纹理化汽缸套可以增强流体力学效果,减少环/缸套系统的摩擦,有利于提高发动机的机械效率和低摩擦设计在生产发动机上的应用。与高原润滑的气缸套-活塞环对相比,在以油压动压为主导的低温油浴条件下,摩擦系数降低了6%,而在以混合润滑为主的高温油浴条件下,摩擦系数降低了约1.8%–6.1%。这表明具有适当微观结构的激光纹理化汽缸套可以增强流体力学效果,减少环/缸套系统的摩擦,有利于提高发动机的机械效率和低摩擦设计在生产发动机上的应用。与高原润滑的气缸套-活塞环对相比,在以油压动压为主导的低温油浴条件下,摩擦系数降低了6%,而在以混合润滑为主的高温油浴条件下,摩擦系数降低了约1.8%–6.1%。这表明具有适当微观结构的激光纹理化汽缸套可以增强流体力学效果,减少环/缸套系统的摩擦,有利于提高发动机的机械效率和低摩擦设计在生产发动机上的应用。

更新日期:2021-02-19
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