Abstract
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.
Highlights
Despite the negative climatic changes that the planet is experiencing and the progressive reduction of fossil resources, fuels from fossil materials continue to represent a high percentage as one of the main sources of energy used [1,2]
Loss film are located in the top dead center (TDC) and bottom dead center (BDC), which is in agreement with the results reported in 9 shows minimum oil film thickness (MOFT)
This can be a consequence of the pocket a change in the pressure conditions. This is mainly reflected in a decrease in the applied texture, which causes an increase in the thickness of the lubrication film a the asperity contact force and in the total friction force, in which reductions of 9.43% and a change in the pressure conditions
Summary
Despite the negative climatic changes that the planet is experiencing and the progressive reduction of fossil resources, fuels from fossil materials continue to represent a high percentage as one of the main sources of energy used [1,2]. It is necessary to achieve a 60% reduction in pollutant emissions by 2050 in order to effectively mitigate the planet’s environmental problems [3,4] This is a great challenge, as internal combustion engines (ICE) are expected to remain relevant for decades to come [5]. The interaction between the cylinder liner and the piston rings represents between 40% and 55% of the losses caused by friction [11] This implies that the reliability, performance, and useful life of the engine are strongly influenced by the working conditions in the union between the cylinder liner and the piston ring. The conditions in this joint depend on the lubrication characteristics [12]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
