| 摘要 |
PROBLEM TO BE SOLVED: To prevent concentration of abrasion on only a part of a top face of a cap by stably rotating the cap.SOLUTION: A rotating mechanism 40 is disposed on a valve train 1. The rotating mechanism 40 accumulates energization force by utilizing displacement of a rocker arm 20 to one side p in a longitudinal direction to a cap 30 in the latter half of lifting when the rocker arm 20 is oscillated to a returning direction R at a closing side of a valve 8. In a non-lifting time when pressing force of the cap 30 by the rocker arm 20 is lowered by closing the valve 8 thereafter, one side part in a width direction of the rocker arm 20 of the cap 30 is energized to the one side p in the longitudinal direction of the rocker arm 20 by energization force, and the cap 30 is rotated to one side in the circumferential direction. By repeating it, the cap 30 is intermittently rotated to the one side in the circumferential direction in every non-lifting time.SELECTED DRAWING: Figure 5 |
