| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricant supply structure of a dynamic valve device of an internal combustion engine which further increases an amount of oil feed by achieving engine high rotation.SOLUTION: A lubrication structure of a dynamic valve device comprises locker arms 43, 44 which are pivoted at pivot base parts 43a, 44a by oscillation/support locker arm shafts 45, 46 at each pair of intake/exhaust machine valves 18, 19, interposed between valve stem end parts 18c, 19c and cam faces 34a, 35a of cam shafts 32, 33 and make them contact with each other, make oscillation arms 43b, 44b receive pressing forces generated by the cam faces 34a, 35a, also make them transmit the pressing forces to valve stems 18a, 19a, and open and close the machine valves 18, 19. The lubrication structure of the dynamic valve device also comprises: an oil passage 62 which is arranged at a cylinder head 4 in axial directions of the cam shafts 32, 33, and formed of a single passage between the intake/exhaust valves 18, 19 and at a lower position rather than the locker arm shafts 45, 46; and oil injection oil passages 75, 76 which are formed in pair so as to be independently oriented at each of the locker arms 43, 44 from the oil passage 62. |
