The effect of cylinder liner surface topography on abrasive wear of piston-cylinder assembly in combustion engine

This paper describes the distinctions between piston-cylinder assembly wear of the engines varied by cylinder liner roughness parameters due to different honing settings made. Research was performed on the test-bed where the wear was forced by grinding flour precisely dosed into the engine inlet manifold. After 10 h of running-in operation the high correlation of the maximum valley depth of the profile Rv with the piston-cylinder assembly wear was noticed. After 21 h of full load operation a similar strong relationship, but referring to the maximum peak height of the cylinder liner profile Rp occurred as well. Both these parameters have a physical interpretation on a surface material ratio diagram, where Rv corresponds to the material fraction of the surface layer, and Rp - to the oil retention volume.