Patent ID: 7431305
Filing Date: 2008-10-07
Classification: F16J

Abstract:
1. A sealing arrangement for pistons of internal combustion engines having an oil wiping ring and a ring groove, the sealing arrangement having a lamella ( 1 ) provided with parallel walls, whose working surface (h) has a barrel-shaped asymmetrical shape, having a vertex line ( 3 ) that extends over the circumference of the lamella, whereby the lamella is disposed in a ring groove ( 7 ) of the piston, having one ring groove wall ( 6 ) facing away from the piston crown side and one ring groove wall ( 5 ) facing the piston crown side, wherein at least one of the ring groove walls ( the working surface (h) of the lamella ( a first segment (I) following the asymmetrical shape of a polynomial of the second order in. with h(x)=ax+bx x=working surface coordinates in the Cartesian coordinate system in mm, and a, b are coefficients, with a being defined by the ratio of the axial wall play of the lamellae relative to the width of the lamellae; b being defined as the amount of the working surface curvature; a supporting vertex (II) h(x=0) configured as an edge, and a third segment (III) following the asymmetrical shape of the function h(x)=cx in the assembled state of the oil wiping ring (