Patent ID: 8382376
Filing Date: 2013-02-26
Classification: F16C

Abstract:
1. A split-type sliding bearing for a crankshaft in an internal combustion engine, comprised of a pair of semi-cylindrical bearings which are mated with each other into a cylindrical body in use, and adapted to be fitted in a split-type bearing housing having a cylindrical bearing retaining bore which is bi-split so as to be aligned with the pair of semi-cylindrical bearings in the mated condition, wherein: the split-type bearing housing is composed of a housing half having a higher thermal expansion coefficient, and a housing half having a low thermal expansion coefficient in a preinstalled condition, a first semi-cylindrical bearing which is one of the pair of semi-cylindrical bearings, and which is supported on the housing half having the higher thermal expansion coefficient, and a second semi-cylindrical bearing which is the other one of the pair of semi-cylindrical bearings, and which is supported on the housing half having the lower expansion coefficient, have the following dimensional relationship in the preinstalled condition: (1) the first and second semi-cylindrical bearings have an equal outer diameter, and (2) opposite circumferential end parts of the first semi-cylindrical bearing have a thickness which is larger than that of opposite circumferential end parts of the second semi-cylindrical bearing; whereby the inner surfaces of the first semi-cylindrical bearing and the second semi-cylindrical bearing are aligned with each other at abutting end faces of both semi-cylindrical bearings in an installed condition upon thermal expansion of both housing halves resulting in a stepped difference due to a difference between degrees of thermal expansion of both housing halves, when the temperature of the housing halves are increased during operation of the internal combustion engine.