| 摘要 |
PROBLEM TO BE SOLVED: To suppress wear in a valve end by always supplying oil to a valve end.SOLUTION: An intake valve 55 is pressed by a rocker arm 77 toward a combustion chamber which allows a valve head to protrude into the combustion chamber. Therefore, a valve stem end 63 moves toward the combustion chamber together with a pressing part 85 of the rocker arm 77. Even if the intake valve 55 is moved to an open position, oil from an injection port 93 is scattered by a reflection wall 95 and a sufficient amount of the oil can be supplied to the valve stem end 63, a shim 68, a retainer 66, and the pressing part 85 of the rocker arm 77 which are present within the scattering range. Thereby, wear in the valve stem end 63 can be suppressed. |
