| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a piston cooling oil injection device capable of reducing layout restrictions to an oil injection device and a supply oil passage, preventing oil leakage, and ensuring light weight and low cost.SOLUTION: In a piston cooling oil injection device, an oil jet pipe 30 is inserted into a jet pipe insertion hole 40 penetrating a crank case 11a from an outer circumferential surface to an inner circumferential surface across the crank case 11a, and the oil jet pipe 30 is integrally fixed to the crank case 11a by a positioning member 38 so that an injection direction of oil injected from an oil injection port 37 of the oil jet pipe 30 can be kept to a direction of orienting an inner surface of a top of the piston.</p> |
