Piston ring and piston ring / piston combination with improved wear characteristics

摘要

The present invention relates to a piston ring with improved wear characteristics, wherein the piston ring has a tread, an upper ring flank, a lower ring flank and an inner surface, wherein the piston ring has a radius R, and wherein a tread contour in a radial section an upper portion, a middle Area and a lower area where the upper area of the tread contour has a radius of curvature R lying between the ring radius R and infinity, the center area of the tread contour has a radius of curvature R lying between the ring radius R and infinity, and the lower area has a radius of curvature R, which is smaller than the ring radius R.