| 摘要 |
PURPOSE:To control the opening of a throttle valve smoothly, by employing such an arrangement that, when an output shaft is stopped after shifting to a limit position in a throttle valve closing direction, the output shaft is brought into contact with a spherical projection at the center of its end face located on the opposite side of the lever of the output shaft. CONSTITUTION:When a lever 3 is brought into contact with the end face 7c of a lever of an output shaft 7, the output shaft 7 is pushed to the left. In this state, a third gear 15 and the output shaft 7 compress a compression spring 22 toward a DC motor 8 and turn on a switch 23. Resultantly, the DC motor 8 is set into operation and causes shifting of the output shaft 7 by the aid of a gear mechanism. That is, the output shaft 7 is moved to the right in increasing the opening of a throttle valve 2, while it is shifted to the left where it is held in contact with a ball 20, projection 21 or the like at the idling operation when the opening of the throttle valve 2 is minimum. |
