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AssigneesMahle Metal Leve S/A, Mahle International GmbH
InventorsGisela Ablas Marques, Paulo Jose Da Rocha Mordente, Paulo Roberto Vieira De Morais
Estimating the term…
A one piece oil control ring for an internal combustion engine may include a plurality of segments having a metal base and being operatively associated with one another. Each segment of the plurality of segments may define a superior portion and an inferior portion which may both be oriented towards an internal surface of a cylinder liner. The superior portion and the inferior portion may each have a first surface substantially parallel to the internal surface of the cylinder liner wherefrom there may extend a substantially inclined second surface. The metal base may have a tempered martensitic matrix having a hardness of 400 HV to 600 HV. A nitrided layer may be disposed upon all surfaces of each of the plurality of segments.
A one piece oil control ring for an internal combustion engine, comprising a plurality of segments having a metal base and being operatively associated with one another, each segment of the plurality of segments defining a superior portion and an inferior portion both oriented towards an internal surface of a cylinder liner, the superior portion and the inferior portions each defining a first surface substantially parallel to the internal surface of the cylinder liner wherefrom there extends a substantially inclined second surface, wherein the metal base has a tempered martensitic matrix having a hardness of 400 HV to 600 HV and wherein a nitrided layer is disposed upon all surfaces of each of the plurality of segments.
A one piece oil control ring for an internal combustion engine comprising a plurality of operatively associated segments having a metal base and arranged to define a ring-shape, each of the plurality of segments having a superior portion, an inferior portion, and a central portion, the superior portion and the inferior portion extending radially outward from the central portion relative to an axis of the ring-shape defining a C-shape, the superior portion and the inferior portion each having a first surface facing away from the central portion and a second surface abutting the first surface, the second surface inclined toward an interior of the C-shape, wherein the metal base has a tempered martensitic matrix having a hardness of 400 HV to 600 HV, and wherein a nitrided layer is disposed on all surfaces of each of the plurality of segments.
A one piece oil control ring for an internal combustion engine comprising a plurality of operatively associated segments having a metal base, each of the plurality of segments having a superior portion, an inferior portion, and a central portion extending between the superior portion and the inferior portion defining a cross-sectional profile having a C-shape, the superior portion and the inferior portion each having a first surface lying substantially parallel to the central portion and a second surface abutting the first surface and inclined toward the central portion by an angle of 30° or greater relative to the first surface;
Dependencies are inferred from the claim text.