Method for producing a piston for an internal combustion engine, piston for an internal combustion engine, piston blank for producing the piston, and casting mold or forging die for producing a piston blank
AssigneeFederal-Mogul Nurnberg GmbH
InventorsUlrich Henzold, Harald Mergler, Christoffer Schmoll
Life of this patent
Estimating the term…
Abstract
A method for producing a piston blank or a piston for an internal combustion engine, includes providing a thickened portion formed in at least one box wall in the direction of thickness approximately in the center thereof, which is at least partly flush with a cooling channel. A resulting piston blank or piston having these features can be made in a casting mold or forging die designed in a corresponding manner.
Claims9
A method for producing a piston for an internal combustion engine, in which, as part of the production of a piston blank by forging, a thickened portion is formed by forging in at least one box wall in the direction of thickness in the center thereof, which is at least partly flush with a cooling channel;
- said at least one box wall is formed on the outside of a piston pin boss, the pin boss having a planar outer face, and said at least one box wall bulges outward beyond said planar face to form said thickened portion.
A piston for an internal combustion engine having at least one box wall in which a thickened portion is formed by forging in the direction of thickness in the center, which is not mechanically reworked with the exception of a bore formed therein, with at least one box wall being formed on the outside of a pin boss, the pin boss having a planar outer face, and said at least one box wall bulging outward beyond said planar face to form said thickened portion.
A piston for an internal combustion engine, comprising:
- a piston body having a pair of pin bosses each having a planar outer face and each received between two box walls extending laterally of the pin bosses to opposite sides thereof;
- an annular cooling channel disposed above the pin bosses;
- at least one of said box walls having a locally thickened region extending in a longitudinal direction of the piston;
- said at least one of said box walls bulging inward of the box wall and bulging outward of the planar face of the associated pin to form said locally thickened region;
- and
- wherein said locally thickened section is provided between one of the pin bosses and a load-bearing shaft wall of said piston body, said locally thickened section includes a bore open at a bottom of the at least one thickened portion and communicating at an open end of the bore with said cooling channel.
Dependencies are inferred from the claim text.