| 摘要 |
PROBLEM TO BE SOLVED: To lubricate each part of a valve system, and obtain enough seizure resistance even in high load/high rotational ranges, by providing a wall part which is approximately perpendicularly crossed with the extended line of a rectilinear part on the loose side of a timing adjustment driving member, and fining oil stuck to the timing adjustment driving member by being hit on the wall part. SOLUTION: In the action of a lubricating system, when a cam pulley 21 is rotated, oil 35 is dispersed by being changed into drops along the elongated line EL of a rectilinear part 18b on the loose side of a timing adjustment driving member (timing belt) 18, and collided with the wall part 42 of a head cover 34, then changed into mist by being further fined. Even through the timing belt 18 is passed through the vicinity of the wall part 42, oil 35 stuck on the timing belt 18 is dispersed to the outside by centrifugal force, and collided with the circular arc stage part 37 of the inner surface of the head cover 34. Each part of a valve system can be lubricated, and enough seizure resistance can be obtained even in high load/high rotational ranges. |
