| 摘要 |
A main bearing metal (41) has: a main bearing metal planar portion (42); a main bearing metal oil groove (44) in which a main-bearing-metal-side oil groove (43) extending in a circumferential direction is formed along the entirety of an inner circumferential surface; a first oil hole (48), one end thereof opening into the main-bearing-metal-side oil groove (43) and the other end thereof communicating with a lower end of an in-block oil channel (27) that extends from a cylinder block oil gallery to a crankshaft bearing (12); and a second oil hole (49), one end thereof opening into the main-bearing-metal-side oil groove (43) and the other end communicating with an upper end of an in-cap oil channel (28) that extends from the crankshaft bearing (12) to a control shaft bearing (17). |
