| 摘要 |
The valve train V of an internal combustion engine E includes; a rocker arm 50, 60 for opening and closing the suction valve 13 ; a holding body 70 for holding the spring 77 to generate the bias force F 3 for biasing the rocker arm 50 to the suction cam 21 ; and a drive shaft 81 for moving the supporting shaft 32, 33 of the rocker arm 50, 60 via the holder 30 . The rocker arm 50 includes: an acting section 54 on which the bias force F 3 of the spring 77 directly acts; a cam contact section 52 coming into contact with the suction cam 21 . The holding body 70 provided integrally with the holder 30 moves following a position of the supporting shaft 32 which moves together with the holder 30 . The spring 77 is arranged between the holding body 70 and the acting section 54 , which are opposed to each other in the direction of the line of action of the bias force F 3 and along the plane perpendicular to the rotary centerline L 2 of the cam shaft 20.
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