| 摘要 |
PURPOSE:To surely lubricate a contact part between each suction valve and the valve seat part, by connecting a blow-by gas passage to a surge tank, and interconnecting the oil sump part installed in a bottom part inside the surge tank to each suction pipe inside via a small hole. CONSTITUTION:Each suction pipe line 4 is inserted into a surge tank 5 as curved upward from the bottom part, and blow-by gas to be discharged out of a cylinder head cover 6 or the like is designed so as to be taken in via a blow-by gas passage 7. In an inner bottom part in the surge tank 5, there is provided with an oil sump part 8 in a part to be situated in the more upper part than each suction pipe line 4, and this oil sump part 8 is interconnected to the inside of each suction pipe line 4 via a small hole 9. |
