| 摘要 |
An internal combustion engine is equipped with a connecting rod (13) and an oil jet (25). The connecting rod has a small end portion (15) that is coupled to a piston (12), and the small end portion and a large end portion that is coupled to a crankshaft are connected to each other by a shaft portion (17). The oil jet injects oil toward a reverse face of the piston (12). With this internal combustion engine, a communication hole (20) that opens toward the reverse face of the piston and that communicates with a pin hole (19) is provided through the small end portion of the connecting rod. A lower portion (28) of an inner peripheral face (30) that forms the pin hole of the small end portion protrudes more in a direction of extension of a central axis of the pin hole than an upper portion (29). |
