| 摘要 |
PURPOSE:To prevent the occurrence of any misoperation in time of an engine speed being low, by stopping the discharge of an integrating condenser when terminal voltage of the integrating condenser, which controls the ignition timing, is above the setting voltage or below the supply voltage otherwise. CONSTITUTION:A comparator (n) for permission signal generation is installed. In this comparator (n), setting voltage Vt obtainable from a setting voltage generating circuit p and terminal voltage Vc of an integrating condenser (a) both are being inputted. This comparator (n) outputs a high-level spark advance permission siggnal Va only when the terminal voltage Vc is less than the setting voltage Vt. Unless this signal is outputted, the condenser (a) will no longer discharge. When supply voltage is below the setting value, discharge is stopped as well. With this constitution, the setting value of ignition timing at low speed is preventable from excessive spark advancing. |
