| 摘要 |
An oil jet (23) is provided with an injection nozzle (32) that injects an engine oil supplied from an oil supply passage toward a piston. This injection nozzle (32) comprises a first conduit (36) comprising a supply opening (35) that is in communication with the oil supply passage side, and a second conduit (38) comprising an injection opening (37) that injects the engine oil, the first conduit (36) and second conduit (38) being connected so that the center axes thereof meet at a prescribed angle. The injection opening (37) is formed so that the cross-sectional area thereof is greater than the minimum cross-sectional area in the radial direction of the first conduit (36). |
