Ks Kolbenschmidt Gmbh

Matthias Laqua

Wolfgang Köhler

Franz-Peter Allig

Alexander Schäfer

Volker Lehnert

Dieter Krämer

Markus Pinz

Klaus Bacher

Piston blank for a piston, comprising a piston lower part, which comprises a first joining surface running around a central axis of the piston blank, and a piston upper part, which comprises a second joining surface running around the central axis and an inner surface running around the central axis and adjoining the second joining surface as viewed along the central axis, wherein the piston upper part can be placed with its second joining surface on the first joining surface, and wherein a tangential plane which is assigned to the second joining surface is inclined relative to the central axis such that the tangential plane intersects the inner surface.

Piston blank, piston and method

The invention relates to a piston for an internal combustion engine formed from a lower part and an upper part which are threadingly connected to one another to form a piston. In one example, an anti-rotation safeguard device is used to prevent unwanted rotation of the upper part relative to the lower part. In another example, a forged extension and a nut are used to obtain a prestress during operation of the piston. In another example, a cooling gallery including extension bores are used to increase the cooling capacity.

Piston having outer thread

A piston for an internal combustion engine including an upper part and a lower part connected by at least one threaded connection. The lower part includes a cutout positioned in the inner region of the piston above a peak of the pin bore extending toward the outer periphery of the piston. The lower part further includes at least one web positioned above the pin bore extending toward the outer periphery of the piston.

Optimized hub support

The invention relates to a cooling-channel piston for an internal combustion engine, having an upper part and a lower part, wherein the upper part and the lower part are connected to one another by way of a cohesive joint in the form of a weld seam, and the upper part and the lower part form an annularly encircling cooling channel which is arranged approximately behind a ring section, wherein a gap geometry is provided between a lower edge of the ring section and an upper edge of the lower part, wherein the gap geometry has at least one sliding surface which is arranged on a lower edge of the ring section of the cooling-channel piston and/or on the corresponding upper edge of the lower part of the cooling-channel piston, and to several methods for the operation of a cooling-channel piston.

Gap geometry in a cohesively joined cooling-channel piston

A piston for an internal combustion engine has a sliding shoe carried in a force accumulator. The sliding shoe has a channel to transfer cooling oil into a hollow space. The force accumulator is located is a channel formed by the piston, and the sliding shoe is guided partially inside the force accumulator.

Slide shoe for a piston for use in internal combustion engines

A cooling channel piston has a radially circumferential cooling channel located behind a ring field. The cooling channel piston is forged from a steel material and the cooling channel is worked in by machining between an upper part below the ring field and a lower part above the piston bosses and the piston skirts. The cooling channel extends behind the ring field in the direction of an upper face of the upper part, it being provided that the cooling channel piston has above its piston bosses and piston skirts an outwardly oriented support region. A closing element, which closes the cooling channel after the production thereof, is fastened between the lower edge of the ring field and the support region.

Growing community of inventors

Bad Wimpfen, Germany

Matthias Laqua