| 摘要 |
PURPOSE: A connecting rod bearing of an internal combustion engine is provided to collect the materials moving along with lubricant in a groove formed in a circumferential direction. CONSTITUTION: A circumferential groove(24C) on the inner side of one semi-cylindrical bearing in one or more semi-cylindrical bearings(24,26) is provided, the circumferential groove is extended form one or more of two contact ends(24A,24B) to the other semi-cylindrical bearing towards the circumferential central part of the semi-cylindrical bearing and is located on the same line with the exit(20A) of a lubricant flow path(20). One or more contact ends are aligned in the same direction as that of the relative rotation of the crank pin(12) to the connecting rod bearing. The depth of the circumferential groove is 0.1-0.8 mm, the circumferential length is not smaller than the diameter of the lubricant exit measured in the circumferential direction of the semi-cylindrical bearing, the maximum limit length of the circumferential length corresponds to a circumferential angle of 45° which is measured starting from one or more contact ends, the diameter of the lubricant exit is measured in the axial direction of the semi-cylindrical bearing and the maximum width of the lubricant exit is defined as the width of the inner regions located on two sides in the axial direction of the circumferential groove.
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