Some Studies on Boundary Lubrication on Wear Mechanism of Piston Rings

摘要

The thesis describes the theoretical and experimental investigations of the wear characteristics of piston rings of an I.C. engine. Its importance as a boundary lubricated system is emphasized. The transition temperature at which the friction increases abruptly, as determined on a simulated rig, is identified to be critical in the lubrication process of piston rings. A simple formulation has been developed for prediction of wear of piston rings using boundary lubrication principles. The effectiveness of boundary lubrication is related to the forces which hold them on the solid surface as a continuous film based on adsorption concepts. The analysis of wear mechanism of the piston ring is basically an extension of the adhesive wear law. An attempt is made to correlate the energy of adsorption parameter, E, with the properties of the interacting surfaces and operational parameters so as to get better understanding of the wear mechanism.