| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricating/cooling structure for an internal combustion engine that enables oil supply to an intended position in simple processing lead time and installation of an oil injection part at an intended position for a piston oil jet, in the internal combustion engine in which a cylinder and a crank case are integrally formed.SOLUTION: An internal combustion engine 1 includes: a crank case 2 having opened one side; a holder 5 that is mounted to inside of an opening 20 of the crank case, is mounted with a bearing and supports shafts including a crank shaft 11, a main shaft 13 and a counter shaft 14; and a crankcase cover 6 for closing the opening of the crank case. A lubricating/cooling structure for the internal combustion engine comprises: an oil supply opening 80 opened from an oil passage 77 formed within the crank case cover toward the holder side; and an oil supply passage 82 for receiving/transferring oil from the oil supply opening side of the crankcase cover to the holder side. |
