Ks Kolbenschmidt Gmbh

Emmerich Ottliczky

Gerhard Luz

Eberhard Weiss

Franz Ratzky

Siegfried Mielke

Volker Gniesmer

Harald Pfestorf

Hartmut Kamp

Matthias Fahr

Ingo Roth

Norbert Ries

Gunter Bayer

Werner Landvatter

Andreas Berninger

Andreas Rehl

Gregor Müller

Rainer Freeser

Hans-Joachim Weimar

Piston () of an internal combustion engine, which piston is designed in structured construction, comprising two oppositely arranged load-bearing skirt wall portions (), wherein a connecting wall () respectively extends, starting from a pin boss (), in the direction of the side edge of the load-bearing skirt wall portions (), characterized in that in an interior of the piston () is (are) disposed at least one rib (), preferably three ribs (), and the material of the regions around the at least one rib () is reduced.

Piston with a structured design

A steel piston () for a combustion engine, having an upper part in which a ring section () with at least one ring groove () is arranged, wherein the upper part is adjoined by a lower part that has two opposing skirt wall sections (), wherein the two skirt wall sections () are connected via two mutually opposite case walls (), wherein a pin bore () surrounded by a piston boss () is provided in each case wall (). In one example, there is at least one aperture () or at least one recess in the case wall () in the region between the piston boss () and the skirt wall section ().

Steel piston with optimized design

A piston, in particular, a gallery-cooled piston for an internal combustion engine has a piston bottom part and a piston upper part which are connected in a joining process to produce the piston. The piston upper part has at least one ring zone and an inner wall. The piston bottom part has a radially circumferential oblique surface at the end which faces the piston upper part. The oblique surface, interacting with the inner wall of the piston upper part, brings about a centering action during the joining process of the piston parts. A joining method for manufacturing a piston is also disclosed.

Joined connection on a two-part piston and joining method

A method for producing a piston for an internal combustion engine, which piston has at least one cooling channel and is produced from at least one upper part and one lower part. The cooling channel of the piston is formed of the upper part and the lower part where the upper part and the lower part of the piston are each produced by means of a forging process At least one rib-like element, in particular, at least one rib, is additionally forged during the forging of the upper part in an area of the cooling channel and/or at least one rib-like element, in particular, at least one rib, is additionally forged during the forging of the lower part in an area of the cooling channel. Two alternative production methods and to a piston for an internal combustion engine are disclosed.

Two-part steel piston for internal combustion engines

A piston of an internal combustion engine, includes a piston upper part and a piston lower part which are supported via corresponding joining webs, in each case forming a joining zone connected in a material-to-material manner by means of a multi-orbital rotary friction weld. The joining webs and which are in each case directly connected have a wall thickness S, Swhich is identical as far as possible. The piston encloses a combustion-chamber recess and at least one cooling duct which are made centrally or eccentrically in the piston. The combustion chamber recess and the cooling duct form a circular contour or a contour which deviates from a circular shape.

Piston for internal combustion engines

A piston for an internal combustion engine includes a piston head provided with an annular field, and a piston shaft arranged beneath the annular field. The piston shaft has shaft surfaces and a recess surface which is arranged around a bolt borehole and set back in relation to an outer diameter of the piston. At least one cavity is provided in the region of the lowest annular groove for oil flow in the direction of the recess surface during the movement of the piston and the at least one cavity is arranged outside an especially stressed region above the bolt borehole.

Rotor recess with scupper slots and free casting

A light metal piston for internal combustion engines which includes a bearing bushing comprising a shell wrapped from a rolled strip or band shaped metal material. The shell has a butt joint which is closed in a pressed-in state, with a preferred orientation of the metallurgical grain areas being formed in the circumferential direction of the shell.

Growing community of inventors

Forchtenberg, Germany

Emmerich Ottliczky