Friction loss-reduced piston for an internal combustion engine

A piston of an internal combustion engine, comprising an upper piston portion (1) in which a ring zone (2) is located, wherein, starting at the upper piston portion (1), a piston bottom part (3) with two opposing skirt wall sections (4, 5) is respectively provided on a pressure and a counter pressure side of the piston, and the two opposing skirt wall sections (4, 5) are interconnected via connecting walls (6, 7) that are set back relative to an outer diameter of the piston, wherein in each connecting wall (6 and 7) a pin bore having a pin bore axis for receiving a pin is provided, wherein the two opposing skirt wall sections (4 and 5) comprise different transition areas at a transition of their lateral skirt connections (8, 9 and 16, 17) to the connecting walls (6, 7), wherein the skirt wall section (5) of the counter pressure side comprises a central skirt region (15) extending all the way to a ring zone bulge (12), wherein the central skirt region (15) tapers in a direction toward the upper piston portion (1), wherein the lateral skirt connections (8, 9) on the counter pressure side are configured to coordinate with the taper of the central skirt region (15), and wherein the central skirt region (15) comprises a constant wall thickness (30), the skirt wall section (4) of the pressure side further comprises:

• two central skirt regions including an upper central skirt region (13) adjacent to the ring zone bulge (12) and a lower central skirt region (14) positioned distant from the ring zone bulge (12), to which the lateral skirt connections (16, 17) on the pressure side are laterally adjoined, wherein the upper central skirt region (13) extends from the ring zone bulge (12) past a center of the pin bore axis (18) toward the lower central skirt region (14) and has a wall thickness (34) that is constant along an entire height (38) of the upper central skirt region (13) and the lower central skirt region (14) has a constant wall thickness (32) along an entire height (28) of the lower central skirt region (14), wherein the constant wall thickness (34) of the upper central skirt region (13) is different than the constant wall thickness (32) of the lower central skirt region (14).