Cooling Channel Having Dam And Funnel
AssigneeKS Kolbenschmidt GmbH
InventorsGerhard LUZ, Ingo ROTH, Eberhard WEISS
Life of this patent
Estimating the term…
Abstract
A piston for an internal combustion engine includes a piston upper part and a piston lower part having a cooling channel including at least one inlet opening. A dam-type elevation is formed in the region of the at least one inlet opening through forging of the dam elevation in the cooling channel portion in the piston lower part. In one example, a funnel-shaped inlet contour is formed in the inlet opening by pre-forging. In one example, a V-shaped element is formed in the piston upper part cooling chamber portion in alignment with the inlet opening and used as a coolant jet splitter.
Claims16
A piston of an internal combustion engine, consisting of an upper part and a lower part which are joined together, wherein there is provided a cooling channel which has at least one of an intake opening or a discharge opening for a coolant, characterized in that both a dam-like elevation is formed in the cooling channel in a region of the at least one intake opening or the discharge opening by a finish forged contour of a lower cooling channel region, and, on the inside of the piston, an inlet contour of the at least one intake opening or discharge opening is formed by pre-forging.
An internal combustion piston comprising:
- A piston upper part defining a portion of a cooling chamber having a width oriented radially relative to a piston stroke axis;
- a piston lower part connected to the upper part and forming a portion of the cooling chamber, the lower part defining a coolant intake opening and a discharge opening in communication with the cooling chamber;
- and
- a dam elevation positioned in the piston lower part cooling chamber portion and extending across the cooling chamber width, the dam positioned in a region adjacent to the intake opening, the dam elevation formed through forging at the time of forming the piston lower part.
Dependencies are inferred from the claim text.