Federal-mogul Burscheid Gmbh

Nigel Gray

Richard Mittler

Fabian Ruch

Stephan Machliner

Volker Scherer

Jurgen Gillen

Oliver Nickisch

Jürgen Gillen

An oil scraper ring () includes a ring element (), having an upper ring edge (), a lower ring edge, a ring inner side and a ring outer side (. The ring element () is provided with two opposing contact surfaces (), between which there is a ring gap (. The ring element () is provided with at least one scraper bar () on the ring outer side (. The oil scraper ring () is provided with two recesses (), each arranged on each contact surface (), and each adjoining at least on the ring outer side (), the respective contact surface () and the upper ring edge ().

Oil scraper ring and piston ring set for an internal combustion engine

A piston ring with improved wear properties has a running surface, an upper ring flank, a lower ring flank, and an inner surface. The piston ring has a radius R, and wherein in a radial section, a running surface contour includes an upper region, a central region, and a lower region. The upper region of the running surface contour has a curvature radius R, which lies between the ring radius R and infinity. The central region of the running surface contour has a curvature radius R, which lies between the ring radius R and infinity. The lower region has a curvature radius R, which is smaller than the ring radius R.

Piston ring and piston ring/piston combination with improved wear properties

A piston ring is provided, in particular a compression piston ring having at least one recess with a lower edge running obliquely to the upper piston ring flank on its upper piston ring flank, the ring flank extending radially outward from the piston ring interior and radially inward from the piston ring bearing surface. The piston ring has a chamfer, which is opposite at least one recess. At least one recess and the chamfer extend in the radial direction up to at most the center of the cross-sectional area of the piston ring.

Flutter-suppression piston ring

A play-free oil scraper ring has a cross section with a running surface leg having at least one scraper web that is situated on a running surface, an upper piston ring flank leg that is connected to the running surface leg, and the upper surface of which forms an upper piston ring flank. A lower piston ring flank leg is likewise connected to the running surface leg, the lower surface of which forms a lower piston ring flank. The upper and/or the lower piston ring flank leg are/is elastic, taper(s) inwardly in the radial direction, and their/its piston ring flank(s) essentially form(s) a conical surface in an uninstalled state. The uninstalled piston ring has an axial height that exceeds a width of a piston ring groove for which the piston ring is intended.

Play-free oil scraper ring

The present invention relates to a cylinder liner with a covering layer, and a wear-resistant inner layer, arranged inside of the cylinder liner, wherein a thickness of the wear-resistant inner layer, decreases on at least one axial end of the cylinder liner.

Cylinder sleeve with wear-resistant inner layer

A piston ring () having increased fatigue resistance includes a plastically deformable material. The piston ring () has a running face (), which is delimited at the top by an upper running face edge () and at the bottom by a lower running face edge (). Compressive stresses are introduced into the upper running face edge () and/or into the lower running face edge () along at least one part of the circumference, the compressive stresses having been produced by roller burnishing.

Growing community of inventors

Leverkusen, Germany

Nigel Gray