Split-type sliding bearing for crankshaft in internal combustion engine and split-type sliding bearing device

A split-type sliding bearing device for a crankshaft in an internal combustion engine,

• comprising:
• a split-type sliding bearing for a crankshaft in an internal combustion engine, consisting of a pair of semi-cylindrical bearing bodies which are combined with each other to form a cylindrical body, and
• a split-type bearing housing, having a cylindrical bearing retaining bore and consisting of a pair of housing halves each corresponding to the respective semi-cylindrical bearing body when the semi-cylindrical bearing bodies are incorporated in the cylindrical bearing retaining bore,
• wherein the split-type bearing housing consists of one housing half having a relatively lower stiffness, and another housing half having a relatively higher stiffness,
• wherein the former housing half supports one of the pair of semi-cylindrical bearing bodies, which is of a first semi-cylindrical bearing body, and the latter housing half supports the remainder of the pair of semi-cylindrical bearing bodies, which is of a second semi-cylindrical bearing body, and
• wherein the first and second semi-cylindrical bearing bodies have the following dimensional relationship before they are incorporated in the bearing housing consisting of the pair of the housing halves:
• (1) the first and second semi-cylindrical bearing bodies have an equal outer diameter, and
• (2) both of the circumferential end parts of the first semi-cylindrical bearing body have a larger thickness than those of the second semi-cylindrical bearing body,
• whereby the inner surfaces of the first and second semi-cylindrical bodies are in alignment with each other at those abutting circumferential end faces when the pair of housing halves are combined with each other by fastening bolts after the first and second semi-cylindrical bearing bodies are incorporated therein, even though differential steps arise between abutting end faces of the housing halves by a deformation difference between both of the housing halves due to a difference in stiffness.