Patent ID: 8197143
Filing Date: 2012-06-12
Classification: F16C

Abstract:
1. A sliding bearing for internal combustion engines, comprising a pair of semi-cylindrical bearings cylindrically assembled with each other to support a crankshaft, at least one of the semi-cylindrical bearings being provided with a circumferentially extending oil groove on an inner bearing sliding surface thereof, wherein the oil groove comprises a central portion of a circumferential length of the semi-cylindrical bearing, the circumferential oil groove having a bottom surface of the oil groove which has an up and down form of approximately a sinusoidal curve as a plurality of adjacent ridges and valleys, which undulate consecutively and repeatedly without a flat portion therebetween, and the dimensional relationship between a ridge and an adjacent valley of the plurality of adjacent ridges and valleys is defined by the formula h<0.15 H where H indicates a depth of the circumferentially extending oil groove defined by the inner surface of the semi-cylindrical bearing sliding surface, and a depth of the valleys, and h indicates an elevation difference of the ups and downs of the bottom surface corresponding to a height of the ridges.