| 摘要 |
PURPOSE:To easily and certainly regulate idle rotating speed by displaying the duty ratio of a flow control valve and regulating an idle regulating screw while confirming the display at the time of carrying out feedback control. CONSTITUTION:In an idle rotation control device 2, the engine speed at the time of idling is feedback-controlled to a target rotating speed by controlling the opening and closing of a flow control valve 5 disposed in a fist bypass passage 4 bypassing a throttle valve 3 by means of an electronic control device 6. In this case, it is displayed on a voltmeter 15 whether the flow control valve 6 during the feedback control is controlled based on a determined duty ratio or not. An idle regulating screw 8 is regulated while confirming the duty ratio by the voltage display to adjust the air quantity fed from a second bypass passage 7. Hence, the idle rotating speed can be regulated easily and certainly. |
