Invention Grant
US08616161B2 Piston for an internal combustion engine and method for its production 有权
活塞内燃机及其生产方法

Piston for an internal combustion engine and method for its production
Abstract:
A method for the production of a piston for an internal combustion engine, having a circumferential cooling channel, whereby a blank of a lower piston part is forged, and a blank of an upper piston part is produced, the blanks are pre-machined and joined together to form a piston blank, which is finished to produce a piston. At least one depression or recess is formed into the blank of the lower piston part during the forging process. In the finished piston, the depression forms an opening for a coolant inflow and/or a coolant outflow, or the recess forms an excavation groove for a pin securing ring, respectively.
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