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.
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
.
DOI: 10.3969/j.issn.1001-2222.2025.03.009
