Patent ID: 7900551
Filing Date: 2011-03-08
Classification: F01M,F02F

Abstract:
1. A piston for an internal combustion engine, comprising: a ring belt disposed on a radial outside of the piston, in the vicinity of a piston crown; a piston skirt that follows the ring belt in a direction facing away from the piston crown; a ring-shaped cooling channel disposed in a piston-crown-side edge region of the piston; at least one oil run-in bore and at least one oil run-off bore, which are each connected with an opening of the cooling channel and empty into an interior chamber of the piston; pin bosses held by the piston skirt, disposed on radially opposite sides, each having a pin bore, and at least one oil spray nozzle disposed in an interior chamber of the piston and directed at the at least one oil run-in bore, to introduce cooling oil into the cooling channel, wherein piston-crown-side regions of the pin bosses are reinforced radially inward, and wherein the oil run-off bores are directed at the reinforced regions of the pin bosses.