Effects of double-sided textures matching on friction and wear performance in reciprocating contact interface

Abstract

With increasing demands for friction reduction and wear resistance in heavy-duty diesel engines, the design of surface textures in reciprocating contact zone of the cylinder liner and piston ring (CLPR) has been a major concern. Through designed orthogonal tests for optimizing the double-sided textured CLPR, a maximum reduction in the friction coefficient of 12.63 % was achieved for the superior double-sided textured CLPR compared to the untextured surface, with corresponding reductions in the wear depth of the cylinder liner and piston ring of 16.73 % and 18.25 %, respectively. The relative position variation between the CLPR microtextures at the sliding contact area caused different stress values and stress distribution. Compared to the inferior double-sided textured CLPR, superior double-sided textured CLPR with lower stress concentration and symmetrical distribution within the contact area generated smoother and flatter worn platforms and non-spalling dimple edges with less abrasive wear. It can provide some insight into the matching design of double-sided CLPR surfaces under heavy load conditions.