Patent ID: 8672551

Claim:
A sliding bearing for supporting a crankshaft journal portion of an internal combustion engine, the sliding bearing being a cylindrical body formed from a combination of a pair of semicylindrical bearing halves having contact interfaces, wherein one of the semi-cylindrical bearing halves is provided with a circumferential oil groove on its inner circumferential surface, and has first and second circumferential ends, the circumferential oil groove having an open groove end at least at the first circumferential end, wherein the other semi-cylindrical bearing half is provided with a circumferential local groove on its inner circumferential surface, and has first and second circumferential ends, the circumferential local groove having an open groove end only at the second circumferential end, wherein width centers of the circumferential oil groove and the local circumferential groove are in alignment with each other thereby making the circumferential oil groove and the local circumferential groove to be in fluid communication with each other, and at a region of the fluid communication, a groove bottom of the local circumferential groove is deviated toward an axis of the sliding bearing from a groove bottom of the circumferential oil groove, wherein along a contact interface between the first and second circumferential ends, at least one of two inner side corner edges of the first and second circumferential ends is chamfered to have an inclined face thereby forming an axial groove throughout an entire axial width of the sliding bearing, said axial groove being in fluid communication with the circumferential oil groove, wherein the axial groove has a width of 0.2 to 1 mm, and a depth of 0.2 to 1 mm wherein the respective inner circumferential surfaces of the semi-cylindrical bearing halves are in alignment with each other in a radial direction thereof on inner sides of both contact interfaces between the first and second circumferential ends of the one semi-cylindrical bearing half and the second and first circumferential ends of the other semi-cylindrical bearing half, respectively, and wherein a groove width (W 1 ) of the circumferential oil groove is larger than a groove width (W 2 ) of the circumferential local groove in the fluid communication region.