Piston for internal combustion engines
AssigneesMahle International GmbH, Mahle Metal Leve S/A
InventorsAntonio Eduardo Meirelles Tomanik, Mauricio Ciminelli Duarte de Souza
Life of this patent
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Abstract
The present invention relates to a piston ring (10), particularly a compression ring, for an internal combustion engine, comprising a ring-shaped body (11) having a ring joint (13) formed by butt ends (14a, 14b), the ring-shaped body (11) further having a ring contact face (12) along its perimeter, for contacting a cylinder wall in operation. According to the invention, the ring contact face (12) has a barrel-shaped profile, the barrel-shaped profile having in any of its cross-sections an area of maximum curvature, whose radius of curvature increases in the direction of the butt ends (14a, 14b).
Claims5
A piston ring (10) for an internal combustion engine, comprising a ring-shaped body (11) having a ring joint (13) formed by butt ends (14a, 14b), said ring-shaped body (11) further having a ring contact face (12) along its perimeter, for contacting a cylinder wall in operation, wherein said ring contact face (12) has a barrel-shaped profile, said barrel-shaped profile having in any of its cross-sections an area of maximum curvature, whose radius of curvature increases in the direction of the butt ends (14a, 14b), such that the piston ring (10) has a larger contact area in the regions of the butt ends 14a, 14b than in other regions of the piston ring, for contacting a cylinder wall in operation.
Dependencies are inferred from the claim text.