Patent ID: 7762178
Filing Date: 2010-07-27
Classification: F02F

Abstract:
1. A two-part piston for an internal combustion engine, comprising; an upper part comprising a piston crown and a ring belt formed radially on an outside of the piston crown; a lower part connected with the upper part; a circumferential, closed cooling channel disposed radially on an outside of the piston and close to the piston crown, wherein an upper region of the cooling channel facing the piston crown is delimited by the upper part; a cooling channel cover that closes off the cooling channel on its underside, the cooling channel cover being formed by the lower part; a collar formed onto an outside radius of the cooling channel cover, said collar being directed upwardly toward the piston crown and onto which collar grooves of a ring belt are formed; two skirt elements each connected with the cooling channel cover by way of a skirt connection, and lying opposite one another; two pin bosses each connected with the cooling channel cover by way of a pin boss connection, and lying opposite one another, said pin bosses connecting the skirt elements with one another, wherein the skirt connections make a seamless transition into the pin boss connections, considered over a circumference of the piston; and circumferential recesses in a region of the skirt elements, said recesses being delimited by the cooling channel cover on a piston crown side and by the skirt connections on a skirt side, wherein the skirt connections are connected with a radially inner region of the cooling channel cover on the piston crown side, and with upper regions of the skirt elements on the skirt side.