Daimler Chrysler Ag

Daimler Ag

Franz Rueckert

Peter Stocker

Harald Pfeffinger

Patrick Izquierdo

Tilman Haug

Klaus Land

Helmut Schaefer

Axel Heuberger

Herbert Gasthuber

Micheal Voit

Helmut Proefrock

Jochen Betsch

Oliver Storz

Dezsoe Schilling

Hartmut Engels

Wolfgang Reichle

Frank Streicher

Torsten Wittrowski

Florian Lampmann

Peter Lingl

Internal combustion engine with bearing shells, which are formed essentially by thermal sprayed bearing layers, wherein the thermal sprayed bearing layers are formed by at least two slide bearing materials with different hardness, which are spatially separated from each other and are provided on the outer surface of the bearing shell, as well as process for production of bearing shells for internal combustion engines including the steps:

Bearing shell made of hybrid material and process for production thereof

A casting die for the production of a cylinder block/crankcase of an internal combustion engine includes at least one sleeve, which may be moved relative to its axis and is fitted in each case with a cylinder liner, the sleeve keeping open the cylinder bore of the cylinder block/crankcase and extending from a wall on the cylinder-head side of the die to a wall on the crankshaft side of the casting die. The cylinder liner ends at least 3 mm before the wall on the cylinder-head side of the casting die, and the cylinder liner is held at a distance from the wall on the cylinder-head side of the casting die by a spacer.

Casting die for the production of a cylinder block/crankcase

In a process for casting a metallic semi-finished product into a casting, the semi-finished product is roughened on a surface which faces the casting, then being placed in a defined position in a casting mold and surrounded with casting metal, after which a firm bond is formed between the semi-finished product and the solidified casting metal at the roughened surface. The surface of the semi-finished product is roughened by high-pressure water blasting.

Process for incorporating a metallic semi-finished product by casting

In a cylinder liner of an internal combustion engine for casting into a light-metal crankcase to be cast, in order, during the casting in of the cylinder liner, to achieve as good a binding as possible of the cylinder liner to the surrounding casting material, the cylinder liner has on the outer circumference, in the region of the upper dead center of the piston rings of a piston guided in the liner, an activation layer which consists of a material which, due to the heat effect of the liquid casting material, connects metallically more rapidly to the latter than the liner material, and in that the cylinder liner has a rough surface on the outer circumference following the region of the upper dead center.

Cylinder liner of an internal combustion engine

A cylinder-liner blank which preferably consists of a hypereutectic aluminum/silicon alloy and is cast into a crankcase. A special surface treatment achieves better material bonding of the liner in the crankcase. The blank has a roughness of 30 to 60 &mgr;m on its outside, in the form of pyramid-like or lancet-like protruding material scabs or material accumulations. To obtain this roughness, the surface is blasted with particles which are broken so as to have sharp edges and consist of a brittle hard material, preferably high-grade corundum, with an average grain size of about 70 &mgr;m. A fine fraction is formed and is continuously separated off. The average grain size is maintained by adding new particles.

Two part light metal coating and method of making same

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

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

A cylinder-liner blank which preferably consists of a hypereutectic aluminum/silicon alloy and is cast into a crankcase. A special surface treatment achieves better material bonding of the liner in the crankcase. The blank has a roughness of 30 to 60 .mu.m on its outside, in the form of pyramid-like or lancet-like protruding material scabs or material accumulations. To obtain this roughness, the surface is blasted with particles which are broken so as to have sharp edges and consist of a brittle hard material, preferably high-grade corundum, with an average grain size of about 70 .mu.m. A fine fraction is formed and is continuously separated off. The average grain size is maintained by adding new particles.

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Ostfildern, Germany

Franz Rueckert