Daimler Chrysler Ag

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Daimler-benz Ag

Herbert Gasthuber

Patrick Izquierdo

Peter Stocker

Tilman Haug

Harald Pfeffinger

Franz Rueckert

Axel Heuberger

Micheal Voit

Helmut Proefrock

Mathias Woydt

Oliver Storz

Bernd-Eric Lubbing

Martin Schulz

Wolfgang Reichle

Michael Wiesner

Heiner M&uuml;ske

Ludwig Beyer

A tribological coating made of a copper-free highly hypereutectic aluminum/silicon alloy and/or of a copper-free aluminum/silicon composite material composed such that fine silicon primary crystals and/or silicon particles, intermetallic phases, and oxides form as hard particles during the production of the layers in the atmospheric thermal spraying method and/or are anchored in the structure. The surface of the coating can be machined economically by short-chipping using conventional tools, so that additional alloy elements such as copper for forming additional intermetallic phases such as Al,Cu can be eliminated. This is significant because conventional AlSi cylinder liners in reciprocating engines pose problems in conjunction with certain fuels because of their copper content.

Coating consisting of hypereutectic aluminum/silicon alloy and/or an aluminum/silicon composite material

The operational fluid according to the invention is well suited for the lifelong lubrication and cooling of combustion engines. It comprises as the basic fluid a polyalkylene glycol produced from ethylene oxide and propylene oxide and an additive mixture comprising a) 0.012-1.0 percent by weight of a reaction product of diphenyl amine and 2,4,4-trimethyl pentene; b) 0.01-1.0 percent by weight of a pentaerythritol partially or completely esterified with an alkyl-substituted p-hydroxy propionic acid; c) 0.01-1.0 percent by weight of a mono- or di-(C,-C,) alkyl phosphoric acid (C,-C,) alkyl amide; d) 0.01-1.0 percent by weight of triphenyl thiophosphate; e) 0.01-0.1 percent by weight of a tolutriazol amino-methylated with a straight-chain or branched alkyl group with 2-10 carbon atoms, and/or f) 0.01-0.1 percent by weight of 1H-benzotriazol.

Operating fluid for lifetime lubricated internal combustion engines

A coating for a cylinder bore of a reciprocating engine with an iron, aluminum, or magnesium base comprises a hypereutectic aluminum/silicon alloy. The alloy is applied to a cylinder wall by thermal spraying.

Coating for a cylinder of a reciprocating engine

In a piston/liner arrangement for a reciprocating-piston internal combustion engine, wherein a piston with a skirt is axially movable in the liner, at least one of the piston skirt and the liner includes sections with an open-pore surface structure in which a lubricant with a high affinity to the material having the open-pore surfaces structure is disposed so as to form a lifetime lubrication arrangement.

Piston/liner arrangement for a reciprocating-piston internal combustion

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Ulm, Germany

Herbert Gasthuber