| 摘要 |
PURPOSE:To supply surely the lubricating oil to a large end bearing part by providing a connecting passage for introducing a lubricating oil from an oil transferring passage to a ring equipping groove, and an oil supplying passage for supplying an oil to a large end bearing part. CONSTITUTION:Crank chambers 29-32 for each cylinder are formed with the inner surface of a crank case 12 and seal rings 28. A lubricating oil which is supplied through oil passages 38, 38A, 38B, 39, 39A, 39B is surely supplied to a large end bearing parts 26 via oil grooves 42 provided on seal rings 28, oil holes 43 and ring equipping grooves 41. In such a manner, the large end bearing part of a two cycle internal combustion engine can be surely lubricated. |
