Abstract: An internal combustion engine piston having a cooling chamber open to in a direction toward of pin boss bores. The cooling chamber having at least one oil guiding surface having a slope. On directing a cooling oil spray stream onto the at least one sloped oil guiding surface, there is increased heat transfer from the piston to the cooling oil. In one example, the oil guiding surface slope has a concave or convex curvature.

Abstract: A piston of an internal combustion engine having a piston head which has a ring zone and is adjoined by a piston skirt which encloses an inner shape, with two box walls which lie opposite one another and are set back with respect to the outer contour of the piston and with two skirt walls which are not set back with respect to the outer contour of the piston, wherein the box walls receive hubs, wherein the piston skirt has skirt supports which are connected to the hub, wherein the width of the box wall is a point of intersection between the pin axis and the constant-curvature and constant-tangent further course of the box wall, and to a method for producing a piston for internal combustion engines.

Abstract: An internal combustion engine piston having a cooling chamber open to in a direction toward of pin boss bores. The cooling chamber having at least one oil guiding surface having a slope. On directing a cooling oil spray stream onto the at least one sloped oil guiding surface, there is increased heat transfer from the piston to the cooling oil. In one example, the oil guiding surface slope has a concave or convex curvature.

Abstract: A piston of an internal combustion engine having a piston head which has a ring zone and is adjoined by a piston skirt which encloses an inner shape, with two box walls which lie opposite one another and are set back with respect to the outer contour of the piston and with two skirt walls which are not set back with respect to the outer contour of the piston, wherein the box walls receive hubs, wherein the piston skirt has skirt supports which are connected to the hub, wherein the width of the box wall is a point of intersection between the pin axis and the constant-curvature and constant-tangent further course of the box wall, and to a method for producing a piston for internal combustion engines.

Abstract: A piston for internal combustion engines has a skirt coating consisting of a wear resistant inner layer consisting of a polymer matrix having ceramic particles, aramide fibers and/or carbon fibers dispersed therein and an outer layer consisting of a polymer matrix having solid lubricants dispersed therein and an outer layer consisting of a polymer matrix having solid lubricants dispersed therein.

Abstract: A piston for internal combustion engines has a skirt coating, consisting of a wear resistant inner layer consisting of a polymer matrix having ceramic particles, aramide fibers and/or carbon fibers dispersed therein and an outer layer consisting of a polymer matrix having solid lubricants dispersed therein and an outer layer consisting of a polymer matrix having solid lubricants dispersed therein.