Patent ID: 9238283
Filing Date: 2016-01-19
CPC Classification: B23P,F01P,Y10T

Claim Text:
1. A piston of an internal combustion engine comprising: a top part and a bottom part, at least one joining web, which is integrally bonded in the region of a contact geometry via a friction weld to form a structural unit, wherein at least one cooling duct permeated by a coolant is integrated in the piston and passing the coolant into an inlet opening, flows through the cooling duct and exits the cooling duct via an outlet opening, characterized in that; for the introduction of the coolant into the cooling duct, the inlet opening includes a flow pipe which is inserted in the bottom part and protrudes from a cooling duct base with an excess length, wherein an outlet opening of the flow pipe is arranged above at least one weld bead of the friction weld; and the flow pipe is fixed in a positively locking manner in an installed position by the at least one weld bead of the friction weld between the top part and the bottom part of the piston.