| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil passage structure of an internal combustion engine facilitating formation of an independent oil passage for piston cooling jet in a main gallery or the like of an engine.SOLUTION: An oil jet gallery 12 is formed by a jet gallery pipe 50 fitted in a main gallery 11, and each jet nozzle 10 fastened to a cylinder block 30 is connected to the jet gallery pipe 50. The jet gallery pipe 50 includes a base end flange section 51 internally fitted in a large diameter hole section 11a of the main gallery 11, a cylindrical connection pipe section 52 held on an inner periphery of the base end flange section 51, and a delivery pipe section 53 which has a semicircular shape in cross section and is connected to a rear end of the connection pipe section 52. |
