Mahle International Gmbh

Mahle Metal Leve S/a

Other

Metal Leve S/a Industria E Comercio

Robert Richard Banfield

Juliano Avelar Araujo

Paulo Jose Da Rocha Mordente

Jose V Sarabanda

Jose Valentim Lima Sarabanda

Gisela Ablas Marques

Jose M Leites

Rodrigo Favaron

Jose A Mendes

Edney Deschauer Rejowski

Juliano A Araujo

Paulo José Da Rocha Mordente

José Valentim Lima Sarabanda

Ademir Carubelli

JoseRoberto Simao

A piston ring for an internal combustion engine may include a substantially annular base of a ferrous alloy upon which is applied a coating. The coating may have a first bonding layer and at least a first external layer or a second external layer deposited upon the first bonding layer up to a maximum of 100 micrometers in thickness of a plurality of sequentially deposited first and second external layers. The first external layer may include a nitride of a doped metal chemical element, a doping element being aluminum. The second external layer may include a nitride of the metal chemical element. The first external layer may have a thickness greater than at least once a thickness of the second external layer and less than ten times the thickness of the second external layer.

Piston ring for internal combustion engines

A sliding element for internal combustion engines may include a sliding face upon which are deposited, from the sliding face outwards, an adhesive layer and a coating of hard amorphous carbon. The coating may present a proportion of spto spranging from 0.42 to 2.33 and at least one of an Rmr (0.2-0.5) profile greater than at least 25% and/or an Rmr (0.3-0.5) profile greater than at least 50%.

Sliding element

A sliding combination for use in an internal combustion engine may include at least one cylinder liner defining an internal sliding surface and a ring having an external lateral sliding surface. The external sliding surface of the ring may slide in relation to the internal sliding surface of the liner. The external sliding surface of the ring may include a first coating of a physical vapor deposited metal nitride in sliding contact with a second coating of a diamond-like carbon (DLC) material disposed on the internal sliding surface of the liner.

Sliding combination for use in an internal combustion engine

A sliding element for internal combustion engines may include a ferrous base provided with a film applied upon a sliding surface. The film may have, sequentially, a metal connecting layer, a transitional layer, and a contact layer. The transitional layer may include a carbide containing a metal element. The contact layer may contain DLC (diamond-like carbon) doped with the metal element of the transitional layer, the DLC containing a maximum of 2% hydrogen by weight. An atomic ratio between metal and carbon in the contact layer in terms of a ratio Me/C is equal to or less than 0.1.

Sliding element, internal combustion engine and process for obtaining sliding element

An element with at least one slide surface with a coating for use on an internal combustion engine may include a base of a metallic alloy and at least one inner surface provided with a hard ceramic coating generated by physical vapor deposition. The element may include a porosity with a rate lower than 2 percent by volume, a Vickers hardness ranging from 1500 to 3000HV, and a compressive inner tension lower than 500 MPa.

Element comprising at least one sliding surface having a coating for use in an internal combustion engine or a compressor

The present invention relates to an element () that works sliding, of an internal combustion engine and/or a compressor that undergoes friction and receives a coating of chrome nitride having an equiaxial morphology, with low porosity (lower than 1%) and with a crystallographic orientation predominantly (111), maintaining some reticulate in the orientation (200), so as to improve its resistance to wear and its toughness, prolonging the useful life of the element () that works sliding.

Element provided with at least one slide surface for use on an internal combustion engine

The present invention refers to a piston ring, particularly for use in the piston channel of an internal combustion engine or a compressor, comprising at least a substantially ring-shaped metallic base () having at least a first region (), at least a second region () and at least a gap (), the first region () being positioned in a way substantially opposite to the gap (), the ring comprising at least a nitrided layer () in the second region () and comprising at least reduction of the nitrided layer () in the first region (), whereas the reduced nitrided layer () is at least partially blocked in the first region () due to the previous application of an intermediate layer ().

Piston ring and process for manufacturing a piston ring

The invention relates to a piston ring for internal combustion engines, the piston ring comprises a steel or cast iron base material with a coating of chromium nitride deposited by a physical vapor deposition process on a sliding surface of the piston ring, wherein the coating is composed of a columnar crystal structure of CrN with the following features:

Piston ring with chromium nitride coating for internal combustion engines

Multilayer sliding bearing

Piston tops (1, 70), specially those provided with combustion chamber (2, 20) and ring zone (3, 30) have their cooling condition sensibly improved in such regions due to a better use of the cooling oil capacity by closing the cooling chamber (5, 50) and the region 2I under the combustion chamber by annular ring members (96, 13) in a resilient material, e.g., a polymeric material or, preferably a spring steel, which clamp under the cooling chamber (5, 50) and the region 2I with dimensional interference respectively with grooves (10, 100), notches (11, 110) and groove 15. Methods for the manufacture of such top portion having a reduced compression height are also described.

Growing community of inventors

Sao Paulo, Brazil

Robert Richard Banfield