Friction Characteristics of Cylinder Liner-Piston
Ring Texture Interface under Diluted Lubrication Conditions in Methanol Engine

doi:10.3969/j.issn.1001-2222.2025.03.009

Vehicle Engine ›› 2025, Vol. 0 ›› Issue (3) : 60-67. DOI: 10.3969/j.issn.1001-2222.2025.03.009

Friction Characteristics of Cylinder Liner-Piston Ring Texture Interface under Diluted Lubrication Conditions in Methanol Engine

LI Zhi1，ZHAO Yupeng¹，CHEN Yan¹，ZHANG Xiqing¹，ZHANG Hong²

Author information +

History +

Abstract

Methanol engines are susceptible to methanol-induced dilution phenomenon during operation, which severely degrades the lubrication performance of the cylinder liner-piston ring friction pair. Taking a modified methanol engine as the research object, a numerical lubrication model for the textured cylinder liner-piston ring friction pair was established based on the average Reynolds equation. The model was solved using MATLAB software. By adjusting the dimple texture parameters, its influence on the lubrication performance of the friction pair was analyzed under diluted lubrication conditions. The research results indicate that methanol dilution changes lubricant viscosity, impairs the oil film formation capability of the friction pair and consequently deteriorates the lubrication environment. However, incorporating appropriate surface textures on the piston ring surface can effectively mitigate this adverse effect. Under specific texture parameters such as a dimple radius of 100 μm and a dimple depth of 5 μm, the smallest average hydrodynamic friction force of the lubricant can be achieved.

Key words

methanol engine / cylinder liner / piston ring / lubricating oil / dilution / surface texture / lubrication characteristic

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

LI Zhi, ZHAO Yupeng, CHEN Yan, ZHANG Xiqing, ZHANG Hong. Friction Characteristics of Cylinder Liner-Piston Ring Texture Interface under Diluted Lubrication Conditions in Methanol Engine[J]. Vehicle Engine. 2025, 0(3): 60-67 https://doi.org/10.3969/j.issn.1001-2222.2025.03.009