Patent ID: 8453618
Filing Date: 2013-06-04
Classification: F02F

Abstract:
1. A multi-part piston for an internal combustion engine, comprising: an upper piston part that has a piston crown, an inner support element and an outer support element; a lower piston part having an inner support element and an outer support element, said inner and outer support elements on the upper and lower piston parts delimiting an outer circumferential cooling channel and an inner cooling chamber having an opening in a bottom thereof; a closure element that closes the opening, said closure element having at least one cooling oil opening; and a holding element integrally formed with an underside of the piston crown and extending vertically toward the opening, said holding element being disposed in the inner cooling chamber and said holding element butting the closure element; wherein an end of the holding element that faces the opening has a circumferential groove, into which the closure element engages, and wherein a length of the holding element is dimensioned so that the closure element supports itself on the bottom of the cooling chamber under resilient bias.