Daimler Chrysler Ag

Daimler Ag

Helmut Schaefer

Peter Stocker

Franz Rueckert

Klaus Land

Oliver Storz

Dezsoe Schilling

Hartmut Engels

Eugen Hees

Peter Lingl

The invention relates to a cylinder crankcase () comprising at least one cylinder liner () which is integrally cast in the cylinder crankcase (). The cylinder liner () runs in the cylinder crankcase () from a cylinder-head side () to an oil-chamber side () and has an inner side () and an outer side (). The invention is characterized in that the cylinder liner (), at least at one end, is longer along the inner side () in the axial direction () than on the outer side (). The transition from the inner side () to the outer side () is affected in the form of encircling, concentric steps ().

Cylinder crankcase comprising a cylinder liner

A cylinder liner () for a cylinder block has a contouring () at one end. The contouring () serves to support the liner () on a sleeve () inside a die-casting tool. When the liner () is cast in, recesses () of the liner () are filled by the material of the cylinder crankcase whereby preventing the liner () from seating toward an oil chamber (). The invention also relates to a method for producing a cylinder liner of the aforementioned type.

Cylinder liner for a cylinder crankcase

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

A slide bearing, which is to be used particularly as a crankshaft main bearing of an internal-combustion engine, has a bearing block and a bearing cap. The bearing cap is constructed of a different material than the bearing block. The slide bearing has a bearing layer which is firmly connected with it and consists of a material which is softer than that of the bearing cap and that of the bearing block.

Growing community of inventors

Kernen, Germany

Helmut Schaefer