Piston produced from a single forged or cast piston blank

摘要

A piston and method of making a piston which involves providing a single piece piston blank that, after casting or forging, is separated into separate upper and lower portions. The upper portion is machined to develop a piston head having that includes a cooling gallery portion and the lower portion is machined to develop a piston body having a cooling gallery portion, a skirt and a pair of opposed pin bores. After machining the piston head and piston body are attached together and the resulting assembly is machine finished into a finished piston.