Mahle International Gmbh

Mahle Gmbh

Mable International Gmbh

Kurt Maier

Reinhard Rose

Monika Lehnert

Christoph Steinmetz

Christoph Beerens

Justus Himstedt

Harald R Mueller

Ernst Pfleiderer

Gerhard Bucher

Gunar Nagel

Jose Manoel Martins Leites

Nuno Machado

Helmut Hubner

Monika Raible

The invention relates to a component having a coating containing chromium, nitrogen and carbon, which component is characterized in that the coating comprises a sliding layer having a ceramic phase and an amorphous phase. According to the invention the ceramic phase forms a crystalline ceramic matrix from Crx(CN) with 0.8=x=1.2 and y&#x3e;0.7, and the amorphous phase consists of carbon particles that are embedded in substantially uniform distribution in the crystalline ceramic matrix.

Component having a coating and method for the production thereof

A method for manufacturing a sliding tappet of a valve train of an internal combustion engine may include the steps of: providing a main body; applying a coating at least on a contact surface of the main body configured for contacting an associated cam. The coating may include tungsten carbide and cobalt, and the coating may be applied via high velocity oxygen fuel spraying. The method may further include the step of performing a surface finishing on the coating after the coating is applied.

Method for manufacturing a sliding tappet

The invention relates to a component having a coating containing chromium, nitrogen and carbon. According to the invention the coating comprises a sliding layer having a ceramic phase and a carbon phase, the ceramic phase forms a crystalline ceramic phase from Crx(CN) with 0.8=x=1.2 and y&#x3e;0.7, and the crystalline ceramic phase and the carbon phase form a layer system of alternating individual layers (A, B), wherein the carbon phase has interstices that are filled with the crystalline ceramic phase.

Disclosed is a piston () for a combustion engine, comprising hub bores () that are provided with plain bearing surfaces () and are used for accommodating a piston pin. In order to very effectively and inexpensively prevent the piston pin and the hub bores from jamming and wearing off, a self-lubricating coating () made of a thermally cured resin which contains embedded solid lubricant particles is applied directly to at least one subarea (Tb) of the plain bearing surfaces by means of rotary atomization.

Piston for an internal combustion engine and method for coating its pin bores

Disclosed is a connecting rod for a combustion engine, comprising a small connecting-rod eye that is provided with a plain bearing surface and is used for accommodating a piston pin, and a large connecting-rod eye which is provided with a plain bearing surface and embraces a crankshaft journal. In order to very effectively and inexpensively prevent the piston pin and the crankshaft journal of the connecting rod from jamming and wearing off, a self-lubricating coating made of a thermally cured resin which contains embedded solid lubricant particles is applied directly to at least one of the plain bearing surfaces by means of rotary atomization.

Coating for connecting rods and bearings in an internal combustion engine

The invention relates to a piston ring whose running surface is provided with a coating containing a plastic material. Said piston ring is characterized in that the coating is composed of at least one polyamide-imide and/or at least one polyether ether ketone with embedded particles which can be embodied as hard material particles, solid lubricant particles, or metallic particles. The invention further relates to a piston/piston ring arrangement comprising at least one inventive piston ring and an agent for coating at least the running surface of the piston ring.

Piston ring comprising a coated running surface, and coating agent

A method for the production of wear-resistant edges for a keystone ring for internal combustion engines, involves forming a rectangular ring from a steel strip with a rectangular cross-section, grinding the ring edges and the outer circumferential faces to give the required profile and brushing the inner circumferential face, grinding the upper and lower ring edge to form the keystone ring, complete nitriding of the piston ring surface by a gas-nitriding process (GNS) to form a nitride layer, profiling the nitrided piston ring by grinding and lapping without machining the nitrided edges of the piston ring, stacking the piston rings on the parallel faces, coating the outer circumferential faces of the piston rings with a wearing layer, and grinding the nitrided layer of the faces in the stacked state such that at most a quarter of the total thickness of the nitrided layer is removed.

Growing community of inventors

Leonberg, Germany

Kurt Maier