Abstract
With the increase of methanol diluting lubrication oil, the dynamic viscosity of the mixture presents a downward trend, the total acid number grows while the total base number declines, and the corrosion degree of copper strip upgrades, which indicates that methanol dilution has negative effects on lubrication and anti-corrosion performance of oil. According to ball-on-plate friction test results, the friction coefficient and surface wear of this pair increase in turn with the rising methanol dilution rate, which tends to deteriorate the tribological performance of key friction pairs in methanol engine. After laser surface texturing cylinder liner, the friction coefficient of ring/liner pair is reduced, and the anti-friction effect is enhanced with the rising methanol dilution rate, because the oil storage capacity of textured micro-dimples on liner surface can improve the lubrication of ring/liner pair and reduce asperity contact. Moreover, the micro-dimples can store debris generated in the reciprocating friction process of this pair, so as to alleviate surface wear caused by abrasive wear, and improve the wear resistance of cylinder liner. Therefore, laser texturing cylinder liner can compensate the deterioration of friction and wear performance of ring/liner pair caused by methanol diluting oil with good lubrication adaptability.
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Acknowledgement
This work was funded by the National Natural Science Foundation of China (Grant no. 51375213), the Open Fund of State Key Laboratory of Power System of Tractor (Grant no. SKT2020003), and the Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant no. KYCX191597).
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Bo, X., Bifeng, Y., Hekun, J. et al. Adaptability of Laser Textured Liner to the Effects of Methanol Diluting Oil on Tribological Properties. Int.J Automot. Technol. 23, 461–470 (2022). https://doi.org/10.1007/s12239-022-0042-x
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DOI: https://doi.org/10.1007/s12239-022-0042-x