Abstract: A galleryless piston having a reduced temperature during operation in an engine is provided. The piston includes an upper wall with an exposed undercrown surface. A ring belt and pin bosses depend from the upper wall, and a pair of skirt panels depend from the ring belt and are coupled to the pin bosses by struts. The piston includes an inner undercrown region and outer pockets extending along the undercrown surface. The inner undercrown region is surrounded by the skirt panels, the struts, and the pin bosses. Each outer pocket is surrounded by one of the pin bosses, a portion of the ring belt, and the struts adjacent the one pin boss. A plurality of holes extend through the pin bosses and/or the struts from the inner undercrown region to one of the outer pockets to convey cooling oil from the inner undercrown region to the outer pockets.

Abstract: A galleryless piston having a reduced temperature during operation in an engine is provided. The piston includes an upper wall with an exposed undercrown surface. A ring belt and pin bosses depend from the upper wall, and a pair of skirt panels depend from the ring belt and are coupled to the pin bosses by struts. The piston includes an inner undercrown region and outer pockets extending along the undercrown surface. The inner undercrown region is surrounded by the skirt panels, the struts, and the pin bosses. Each outer pocket is surrounded by one of the pin bosses, a portion of the ring belt, and the struts adjacent the one pin boss. A plurality of holes extend through the pin bosses and/or the struts from the inner undercrown region to one of the outer pockets to convey cooling oil from the inner undercrown region to the outer pockets.

Abstract: A motor vehicle door having a door frame (2; 2') and a covering (3; 3'; 3"; 36) attached to the outer side of the door frame. To accomplish that the outer covering (3; 3'; 3"; 36) of the vehicle door can be mounted on the door frame (2, 2') easily, quickly and economically and that it can be replaced in a simple manner, the covering (3; 3'; 3"; 36) is positioned on the door frame via a horizontal sliding movement. For this purpose, the door frame (2, 2') is respectively provided with a respective horizontal guide rail (9, 13) on its side facing the top and bottom edge region (6, 11; 11') of the covering (3; 3'; 3"; 36) into which guide rail the bent-back portions (8, 12) of the corresponding U-shaped edge regions (6, 11) of the covering (3; 3'; 3"; 36) are engaged.