| 摘要 |
PURPOSE:To minimize discharge amount of NOx by hampering progressive angles on ignition timing at the time of warming up. CONSTITUTION:At the time of increasing output to run warming up, an interlocking arm 9 is within the range of being swiveled by a dash pot 18, a throttle arm 7 is also swiveled incorporatively, while in the swiveling range of this throttle arm 7, because an actuator 47 is depressed, a switch 46 is closed, an electromagnetic change-over valve 43 works to open pressure 42 of a negative pressure type ignition timing progressive angular system 40 to the atmosphere. As resulted, since at the time of running warming up, it will hold the ignition timing on the side of lagging angles, slight opening of a throttle valve increases mixed air amount, in spite of lower engine temperature, with the lag of the ignition timing, it minimizes the discharge amount of NOx. |
