Patent ID: 8899208
Filing Date: 2014-12-02
Classification: F01P,F02F

Abstract:
1. A piston for an internal combustion engine, comprising; a piston head having a circumferential ring belt and a circumferential cooling channel in a region of the ring belt; a piston skirt having pin bosses provided with pin bores, said pin bosses being disposed on an underside of the piston head by way of pin boss connections, wherein the pin bosses are connected with one another by way of working surfaces, wherein at least four axial bores, closed toward the outside, are provided within the pin bosses, said axial bores being disposed between one of the working surfaces and one of the pin bores, respectively, wherein the at least four axial bores open into the cooling channel, wherein the cooling channel and the at least four axial bores contain a filling composed of sodium and/or potassium, and wherein exactly one of the axial bores comprises an opening that is closed off by a closure element.