| 摘要 |
PURPOSE:To prevent the twisting of rotating members, for slidably holding tappets, which are rotated around cam shafts to control the valve timing, by forming guide surfaces for the rotating members. CONSTITUTION:Tappets 13, 13' slide in fitting holes 14a, 14a' formed in rotating members 14, 14' which are rotatable about cam shafts 10a, 10b, and therefore, transmit the movement of cams to valves 5b, 6b. Due to the rotation of the rotating members 14, 14' by a drive device 19 in association with the running condition, the timing of opening and closing of the valves is controlled. Guide surfaces 1a, 1b having a sliding relationship with the rotating members, are formed corresponding to the side surfaces of the rotating members 14, 14' which are therefore prevented from twisting, thereby the reliability of the control may be ensured. |
