Light alloy piston for internal combustion engines

In a light alloy piston for an internal combustion engine, wherein the piston includes bosses, a piston pin, a piston shirt having a closed lower end and which is inwardly offset from the outside peripheral surface of the piston, at locations disposed adjacent to the bosses on both sides of a horizontal plane extending through the piston pin, to such an extent that the distance between outer ends of the bosses amounts to 60 to 80% of the piston diameter and the overall width of the load carrying portion of the skirt amounts to 70 to 95% of the piston diameter, the improvement wherein the inwardly offset portions of the piston skirt form recesses, the piston skirt has end portions which extend below and adjoin the recesses and which are inwardly offset from the outside peripheral surface of the piston, the skirt has walls which extend at right angles to a vertical plane through the piston pin and which extend at right angles to the axis of the piston end portion of the piston skirt and are outwardly convexly locally increased and the overall width of the skirt in the vertical plane through the piston pin is larger by 15 to 35% than the smallest width of the skirt on both sides of the horizontal plane through the piston pin.