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.
Claims17
A piston of an internal combustion engine, consisting of an upper part and a lower part which are joined together to form a cooling channel having an intake opening and a discharge opening for a coolant, characterized in that a dam elevation is formed in the cooling channel in a region of at least one of the intake opening or the discharge opening by a finish forged contour of a lower cooling channel region, and the piston upper part further comprising a V-shaped element integrally formed in the piston upper part by forging and extending into the cooling channel, the V-shaped element radially and angularly aligned with the intake opening and operable to split a flow of coolant received through the intake opening toward alternate positions of the coolant channel.
An internal combustion piston comprising:
- A piston upper part defining a portion of a cooling channel 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 channel, the lower part defining a coolant intake opening and a discharge opening in communication with the cooling channel;
- a dam elevation positioned in the piston lower part cooling channel portion and extending across the cooling channel width, the dam positioned in a region adjacent to at least one of the intake opening or the discharge opening the dam elevation formed through forging at the time of forming the piston lower part;
- and
- a V-shaped element positioned in the piston upper part coolant channel portion and extending into the coolant channel portion, the V-shaped element positioned in radial and angular alignment with the intake opening and operable to split a flow of coolant received through the intake opening toward alternate portions of the coolant channel, the V-shaped element formed by forging at the time of forming the piston upper part.
An internal combustion piston comprising:
- A piston upper part defining a portion of a cooling channel 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 channel the lower part defining a coolant intake opening and a discharge opening in communication with the cooling channel;
- and
- a V-shaped element positioned in the piston upper part coolant channel portion and extending into the coolant channel portion, the V-shaped element positioned in radial and angular alignment with the intake opening and operable to split a flow of coolant received through the intake opening toward alternate portions of the coolant channel, the V-shaped element formed by forging at the time of forming the piston upper part.
Dependencies are inferred from the claim text.