Schaeffler Technologies Ag & Co .kg

Holger Pätzold

Norbert Geyer

Mario Kuhl

Oliver Witter

Lucia Hinkovska

Serge Kursawe

Joachim Krause

Stefan Dupke

Werner Heuer

Frank Schlerege

Klaus Feldner

A method for producing a reduced friction sliding surface on a machine element includes applying a coating comprising amorphous carbon to a surface of the machine element and locally heating the coating with a laser. The coating is heated to a temperature below an evaporation temperature of the coating to achieve a local volumetric increase in the coating and a local increase in a layer thickness of the coating. A surface structure of the coating includes a multiplicity of elevations resulting from a local phase transformation of the coating from amorphous carbon into graphite due to the locally heating.

Method for producing a sliding surface

A switchable finger lever for a valve train of an internal combustion engine is provided, with the finger lever having an inner lever which cooperates at a valve-side end region with a gas exchange valve of the internal combustion engine and is connected at a support-side end region turned away from the valve-side end region pivotally to a support. Outer levers () connected pivotally to the inner lever are arranged on both sides of the inner lever while being urged against the inner lever in a pivoting direction through a spring and being capable of being coupled to the inner lever through a coupling element. The outer levers () are configured with an identical structure and each outer lever () is configured symmetrically to the longitudinal lever axis ().

Switchable finger lever

Growing community of inventors

Burgebrach, Germany

Holger Pätzold