Federal-Mogul Burscheid Gmbh

Peter Esser

Marcus Kennedy

Richard Mittler

Michael Zinnabold

Steffen Hoppe

Klaus Meyer

A piston ring is produced from a main body made of steel or cast steel and comprising a running face, an inner circumferential surface, upper and lower flank regions, and transition regions from the running face to the respective flank region, by coating the running face and the transition regions with a first chromium layer, removing this first chromium layer at the running face down to the base material of the main body, providing at least the running face of the layer-free main body with a nitride layer, and, finally, coating the running face and the transition regions with at least one further chromium layer.

Method for producing a piston ring

A compression piston ringhaving a running-surface region, an upper flank, a lower flankand also an inner circumferential surface, wherein the running-surface regionis provided with a profiled section, which, as viewed over the axial height of the running-surface region, comprises mutually spaced, convexly spherically constructed sectionshaving an upper and lower apex So; Su, wherein a groovewith a depth Tn is arranged between the apexes So, Su, wherein both apexes So; Su are arranged below a centre M of the piston ringin the axial direction.

Compression piston ring with profiled section

The invention relates to a sliding element, in particular a piston ring, having a carbon-based coating and at least in sections, a surface roughness (R) according to DIN EN ISO 4287 of 0.05, preferably 0.08, to 0.11, preferably to 0.1 &#x3bc;m.

Sliding element, in particular piston ring

An oil scraper piston ring includes a ring body having two radial outer running webs on the ring body, which are arranged one behind the other in relation to the run direction of the piston and are spaced apart from one another by an external depression. Each running web respectively has two scraper lips and a wear protection coating is provided on each scraper lip.

Growing community of inventors

Kurten, Germany

Peter Esser