Mahle International Gmbh

Mahle Metal Leve S/a

Mahle Composants Moteur France Sas

Jose Valentim Lima Sarabanda

Fabio Mendes De Araujo

Wolfgang Issler

Juliano Avelar Araujo

Paulo Jose Da Rocha Mordente

Gisela Ablas Marques

Paulo Roberto Vieira De Morais

Robert Richard Banfield

Edney Deschauer Rejowski

Daniel Lopez

Pedro Martin Lerman

Romulo P Fogaca De Almeida

Cedric Marc Roger Fortune

Gisela Ablas Marquez

Christiane Knoblauch

Lucia Beatriz De Rizzo

A piston ring includes a split annular body having an outer circumferential surface, an intermediate coating on the outer circumferential surface, a first layer on the intermediate coating, the first layer having a first hardness and a first porosity, and a second layer on the first layer, the second layer having a second hardness that is less than the first hardness, and having a second porosity that is greater than the first porosity.

Piston ring and method of manufacture

A piston ring and a method of manufacturing a piston ring for a piston of a reciprocating internal combustion engine. The piston ring comprises a body having an outer circumferential surface. A tribological coating is formed on the outer circumferential surface of the body. The tribological coating has a dual layer or a triple layer structure and includes a relatively hard base layer and a relatively porous top layer overlying the base layer. The tribological coating may be provided with varying thickness such that its thickness increases gradually from 90&#xb0; towards 0&#xb0; in a first radial direction of the piston ring and from 270&#xb0; towards 360&#xb0; in a second radial direction of the piston ring reaching its maximum value in the region of 0&#xb0; and 360&#xb0;, i.e. the tips of the piston ring.

A piston ring and a method of manufacturing a piston ring for a piston of a reciprocating internal combustion engine. The piston ring comprises a body having an outer circumferential surface. A tribological coating is formed on the outer circumferential surface of the body. The tribological coating has a dual layer structure and includes a relatively hard base layer and a relatively porous top layer overlying the base layer.

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 piston ring may include a metallic base, an outer slide layer and an intermediate layer disposed between the base and the outer slide layer. The base may extend between at least two end regions. The outer slide layer and the intermediate layer may be disposed on an outer radial face of each end region of the base.

Piston ring

A valve for an internal combustion engine may include a ferrous body having a neck. At least one area of the neck may include a surface layer with a thickness of up to 300 &#x3bc;m. The valve may also be provided with at least 17% solubilized metallic chromium, which may be obtained by an application of a surface melting treatment.

Valve for internal combustion engines and method for obtaining a valve

A bearing lining has a bearing backing layer provided with a coating comprising a first overlay layer and a second overlay layer, the first overlay layer being provided between the bearing backing layer and the second overlay layer. The first and second overlay layers each comprise a matrix material and a soft-phase material that is substantially insoluble in the matrix and dispersed within the matrix as soft-phase particles. The first overlay layer comprises a higher proportion by weight of a grain size reduction additive than the second overlay layer.

Bearing linings

The invention relates to a piston ring () for pistons of internal combustion engines, having a ring running surface (), a ring back (), an upper ring flank (), a lower ring flank (), and two ring joint ends spaced apart by a gap (). According to the invention, at least one opening () is provided in the ring running surface (), which opening forms a fluid connection between the ring running surface () and the ring back () or a ring flank ().

Growing community of inventors

Sao Paulo, Brazil

Jose Valentim Lima Sarabanda