Analysis of the influence of textured surfaces and lubrication conditions on the tribological performance between the compression ring and cylinder liner
Pardo García, Carlos Eduardo | 2021-05-06
The objective of the present investigation is to analyze the tribological performance between
the union of the cylinder liner and the compression ring under the influence of surface texturing and
different lubrication boundary conditions. The analysis is carried out by developing a numerical
model, which involves hydrodynamic pressure, lubrication film thickness, textured surface, dynamic
forces, and lubrication boundary conditions (starved lubrication and fully flooded lubrication).
MATLAB® software (The MathWorks Inc., Natick, MA, USA) is used to solve the equations developed.
The results show that the application of a textured surface on the cylinder liner allows obtaining a
reduction of 20% and 5% in the asperity contact force and in the total friction force. Additionally, the
textured surface allows for a 4% increase in MOFT. In this way, it is possible to reduce the power loss.
The implementation of a boundary condition of fully flooded lubrication produces an overestimation
in the total friction force due to the greater prominence of the lubrication film. Implementing a
textured surface in the ring profile is an alternative way to reduce power loss. The results show that
this alternative allows an 8% reduction in power loss.