Liquid-cooled piston for internal combustion engines
AssigneeDaimler-Benz Aktiengesellschaft
InventorsErwin Schmidt, Siegfried Sumser, Edgar Martin
Life of this patent
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Abstract
In a liquid cooled piston for internal combustion engines having a cooling oil supply and at least one liquid passage which is formed in a top part of the piston bounded by a piston head, the liquid passage is inclined with respect to the piston head and has at least one inlet opening formed as a collection funnel leading to the highest point of the passage for receiving cooling oil and, in the region of the lowest point of the passage an outlet opening for the lubrication of a piston pin bearing disposed therebelow. The passage further includes a diffuser-shaped area widening in the flow direction of the cooling oil through the passage.
Claims7
A liquid-cooled piston for internal combustion engines, said piston having a piston pin bearing, a piston head with a top surface and a piston skirt surrounding an open space, said piston head including at least one cooling liquid passage extending therethrough and having at least one inlet opening in the form of a collection funnel for receiving cooling oil from a cooling oil supply, said cooling liquid passage being inclined with respect to the piston head top surface and having, in the region of its lowest point, an outlet opening disposed above said piston pin bearing for lubrication of said piston pin bearing, said liquid passage further being, at least in a partial region of its length adjacent said collection funnel, diffuser shaped so as to widen in the flow direction of the cooling oil flowing through said liquid passage.
Dependencies are inferred from the claim text.