Abstract:To realize the lubrication of the cylinder linerpiston ring rubbing pairs,and reduce the friction and energy consumption,the rubbing pair of cylinder linerpiston ring in diesel engine was taken as the research object,the effects of the different processing methods of surface microstructures on the friction characteristics of cylinder linerpiston ring friction pair in diesel engine were investigated from the friction coefficient,contact resistance and surface roughness,which provided the basis for selecting the surface texture processing methods of cylinder liner.The result indicate that the wear of machined surface textures on cylinder liner is increased gradually with the increasing of load,while wear of corroded surface textures is increased first and then decreased.The machined surface textures have better tribological properties than corroded surface textures at the medium and low load,while the corroded surface textures have better tribological properties than the machined surface textures at a high load.