Patent ID: 7107893
Filing Date: 2006-09-19
Classification: F16J

Abstract:
1. Piston pin bearing for an internal combustion engine, having pin bores in which a piston pin is mounted, wherein the mantle surface ( 5 ) of the pin bore ( 2 ) is shaped in highly oval shape along the entire supporting pin length, in the region of the pin boss equator-pin boss zenith-pin boss equator, and the parameter representation of the oval follows, where x is a longitudinal Pin boss axis, y is a longitudinal piston axis and the z is a crosswise pin boss axis: and is configured in circular cylindrical shape in the region of the pin boss equator-pin boss nadir-pin boss equator, where: a: great oval diameter; b=D: small oval diameter; D: diameter of the cylindrical pin boss part; α: angle that any desired ray forms relative to the z axis.