Steel piston with optimized design
AssigneeKS Kolbenschmidt GmbH
InventorsEmmerich Ottliczky, Gerhard Luz, Eberhard Weiss, Ingo Roth
Life of this patent
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Abstract
A steel piston (1) for a combustion engine, having an upper part in which a ring section (7) with at least one ring groove (8) is arranged, wherein the upper part is adjoined by a lower part that has two opposing skirt wall sections (2), wherein the two skirt wall sections (2) are connected via two mutually opposite case walls (3), wherein a pin bore (4) surrounded by a piston boss (6) is provided in each case wall (3). In one example, there is at least one aperture (14) or at least one recess in the case wall (3) in the region between the piston boss (6) and the skirt wall section (2).
Claims12
A steel piston for use in a combustion engine comprising:
- an upper part in which a ring section includes at least one ring groove;
- a lower part connected to the upper part, the lower part having two opposite skirt wall sections;
- and
- two mutually opposite case walls connecting the two skirt wall sections, each case wall defining a pin bore surrounded by a piston boss and further defining at least one recess in an inward surface of the case wall facing a piston stroke axis and positioned between the piston boss and the respective skirt wall section, each case wall further defining a first through aperture and a second through aperture positioned on opposing sides of the piston boss, each of the first through aperture and the second through aperture positioned between the piston boss and the respective skirt wall section.
A method for producing a steel piston for a combustion engine, the piston having an upper part having a ring section including at least one ring groove, a lower part connected to the upper part and having two opposite skirt wall sections, and two mutually opposing case walls connecting the skirt wall sections, each case wall having a piston boss defining a pin bore, the method comprising:
- implementing through a material displacement process in a piston blank for the steel piston the two case walls each defining a recess positioned in an inward surface of the case wall facing a piston stroke axis and positioned between the piston boss and the respective skirt wall section.
Dependencies are inferred from the claim text.