| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubrication structure of a valve train capable of reducing lubricant supply amount from a lubricant supply path to a locker arm, and supplying the sufficient amount of lubricant for an abutting portion with a locker arm valve.SOLUTION: A driving locker arm 13a has: a recessed portion 35 opening toward an intake cam shaft 16a; a roller 34 received in the recessed portion 35 and abutting on a low-speed cam 15a; a first lubricant path 36 opening toward a locker arm shaft 17a and communicating with a bottom portion 35a of the recessed portion 35; and a second lubricant path 37 communicating with the bottom portion 35a of the recessed portion 35 and opening toward an abutting portion with an intake valve 11. While the driving locker arm 13a abuts on a base circle of the low-speed cam 15a, a lubricant supply path 21 and the first lubricant path 36 are shut off. When the driving locker arm 13a is driven by the low-speed cam 15a, the lubricant supply path 21 and the first lubricant path 36 are communicated, and the bottom portion 35a of the recessed portion 35 includes a linear oil path communicating the first lubricant path 36 and the second lubricant path 37.SELECTED DRAWING: Figure 5 |
