| 主权项 |
1. Piston (10) for an internal combustion engine, having a piston head (11) and a piston skirt (15) delimited by a lower skirt edge (18),
wherein the piston skirt (15) has a working surface (16) assigned to its major thrust side (DS) and a working surface (17) assigned to its minor thrust side (GDS), and wherein a first zone (21) is assigned to the working surface (16) of the major thrust side (DS) and surrounded by a region (22) exposed to greater stress during operation of the internal combustion engine than the first zone (21), and wherein a second zone (21′) is assigned to the working surface (17) of the minor thrust side (GDS) and surrounded by a region (22′) exposed to greater stress during operation of the internal combustion engine than the second zone (21′), wherein the first and second zones (21, 21′) proceed from the lower skirt edge (18), wherein the zone (21) of the working surface (16) assigned to the major thrust side (DS) and/or the zone (21′) of the working surface assigned to the minor thrust side (GDS) is provided with a coating (23, 23′) that has grooves (24, 24′) that run vertically proceeding from the lower skirt edge (18) in such a manner that, during operation of the internal combustion engine, lubricant oil penetrates into the grooves (24, 24′) and the regions (22, 22′) experience additional lubrication. |
