INTERNAL COMBUSTION ENGINE PISTON HAVING COOLING GALLERY STRUCTURE AND INTERNAL COMBUSTION ENGINE
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United States of America Patent
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app pub date -
Apr 3, 2015
filing date -
Feb 16, 2015
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Abstract
An internal combustion engine piston having an internal cooling cavity structure is provided, which includes a piston body, and a ring body fitted with the piston body to form the internal cooling cavity structure. The ring body and the top of the piston body form a first fitting region, and the ring body and a top end of a skirt portion of the piston body form a second fitting region. The first fitting region includes a body fitting portion and a ring body fitting portion arranged at the top of the ring body. Compared with the conventional technology, the ring body welding cylindrical surface in the present application is fitted with the body welding cylinder surface, and the welding seam formed by the welding does not extend into the cooling cavity.
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