Piston with a structured design
AssigneeKS Kolbenschmidt GmbH
InventorsGregor Müller, Gerhard Luz, Andreas Berninger, Emmerich Ottliczky, Matthias Fahr
Life of this patent
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Abstract
Piston (1) of an internal combustion engine, which piston is designed in structured construction, comprising two oppositely arranged load-bearing skirt wall portions (2), wherein a connecting wall (3) respectively extends, starting from a pin boss (4), in the direction of the side edge of the load-bearing skirt wall portions (2), characterized in that in an interior of the piston (1) is (are) disposed at least one rib (5, 6, 7), preferably three ribs (5, 6, 7), and the material of the regions around the at least one rib (5, 6, 7) is reduced.
Claims14
A piston (1) of an internal combustion engine, which piston is designed in structured construction, comprising two oppositely arranged load-bearing skirt wall portions (2) extending downward below a piston main body defining an interior skirt wall height, wherein a connecting wall (3) respectively extends, starting from a respective one of two pin bosses (4), in the direction of a side edge of the load-bearing skirt wall portions (2), characterized in that in an interior of the piston (1) is disposed a first rib (5) disposed on an inner side and at a center of the respective skirt wall portions;
- a second rib (6);
- and a third rib (7) positioned in angular alignment with the first rib at the center of the respective skirt wall portion and oriented transversely to a pin bore axis, the third rib (7) positioned radially inward and separate from the skirt wall portions, wherein a material thickness of a region around the second and the third rib is reduced, and wherein the first rib (5) is configured to extend along the interior skirt wall height and including a constant cross-section.
A method for producing a piston blank, comprising a main body and skirt wall potions (2) extending downward below the main body defining an interior skirt wall height, in a forging process, wherein, during the forging process, a protruding collar is created, deformed, and subsequently a free circumferential end of the deformed collar is integrally connected to the main body of the piston blank, characterized in that the piston blank is provided in an interior with a first rib (5) positioned at a center of the respective skirt wall portion and having a constant cross-section;
- a second rib (6);
- and a third rib (7) positioned in angular alignment with the first rib at the center of the respective skirt wall portion, wherein regions around the first rib (5), the second rib (6), and the third rib (7) are reduced in terms of a wall thickness in relation to the wall thickness without the first rib (5), the second rib (6), and the third rib (7), the third rib oriented transversely to a pin bore axis and positioned radially inward and separate from load-bearing skirt wall portions (2), and wherein the first rib (5) is configured to extend along the interior skirt wall height.
Dependencies are inferred from the claim text.