Patent ID: 6026777
Filing Date: 2000-02-22
Classification: F02B,F02F,F05C,Y02T

Abstract:
% and having a box shaped shaft;a cooling channel formed in the piston barrel;bosses with boss bores and boss supports formed in the piston barrel;connecting walls between the boss supports;a wall extending all around the piston barrel and disposed axially above the boss bores, said wall extending radially outside of the boss supports and the connecting walls, said wall being integrally formed with the basic piston barrel;an elastic metal sheet in the interior of the piston, said sheet forming a lower limitation of an inner cooling space, said metal sheet being fixed in the region of the boss support by its own initial stress;a combustion trough formed in the piston barrel; anda structural component welded to the piston barrel and forming at least part of a ring band and part of a piston head disposed outwardly radially on the piston barrel, wherein the welding seams are produced by a process selected from the group consisting of MIG-welding process, MAG-welding process, laser welding and electron beam welding;wherein the wall of the piston barrel and the structural component jointly form a radially outer and axially lower limiting wall of the cooling channel, resulting in a bending-resistant zone in the region of the ring band.