Patent ID: 8328425

Claim:
A split-type sliding bearing for a crankshaft in an internal combustion engine, comprising a pair of semi-cylindrical bearing halves, the pair of semi-cylindrical bearing halves being mated with each other into a cylindrical body in use, and adapted to be accommodated in a split-type bearing housing having a bearing retaining bore, the bearing retaining bore being bi-split so as to be aligned with the pair of semi-cylindrical bearing halves in the mated condition, wherein the split-type bearing housing comprises a housing half having a higher thermal expansion coefficient, and a housing half having a lower thermal expansion coefficient, wherein the pair of semi-cylindrical bearing halves comprise a first semi-cylindrical bearing half being supported on the housing half having the higher thermal expansion coefficient, and a second semi-cylindrical bearing half being supported on the housing half having the lower thermal expansion coefficient, the first and second semi-cylindrical bearing halves having the following dimensional prior to installation in the split-type bearing housing: (a) the first and second semi-cylindrical bearing halves have an equal outer diameter, and (b) the first semi-cylindrical bearing half has circumferential ends having a thickness smaller than that of the opposite circumferential ends of the second semi-cylindrical bearing half, whereby inner surfaces of the first and second semi-cylindrical bearing halves are substantially aligned with each other at circumferential end faces thereof in an installed condition upon thermal contraction between the housing halves resulting in a stepped difference due to a difference between the thermal expansion coefficients at the diameter of the bearing retaining bore between the circumferential end faces of the pair of housing halves when the internal combustion engine is cold.