| 摘要 |
To provide a connecting rod for an internal combustion engine enabling an efficient reduction in a contact pressure on a power transmitting pin from a region around an axially outward end of a connecting hole. A base-material hole is formed in a connecting-rod base material. A coating layer formed of a coating material softer than the connecting-rod base material is deposited on an inner peripheral surface of the base-material hole. The base-material hole has: a cylinder inner-surface portion of a constant inner diameter, formed in a central region in an axial direction; and a tapered inner-surface portion that is continuous with an axially outer side of the cylinder inner-surface portion and is radially enlarged in an axially outward direction. The coating layer has: a first coating portion deposited on the cylinder inner-surface portion and having an inner face with an approximately constant inner diameter; and a second coating portion deposited on the tapered inner-surface portion to adjoin the first coating portion and gradually increasing in material thickness in the axially outward direction. |
