| 摘要 |
PURPOSE:To simplify the circuitry of an igniting apparatus for an internal combustion engine, by obtaining a control voltage for a switching element by dividing a reference voltage by a variable resistor the resistance of which is varied in accordance with the opening of a throttle valve. CONSTITUTION:The resistance of a variable resistor 54 is varied with the opening of a throttle valve and it is connected to a constant-voltage diode 50 constituting a reference power source. That is, the voltage of a sliding piece 60 is high when the opening of the throttle valve is small and becomes minimum when the opening of the throttle valve is medium. Further, when the opening of the throttle valve becomes maximum, the voltage of the sliding piece 60 is raised back to a high level. The sliding piece 60 is connected to the gate of a PUT46. The timing at which the PUT46 is triggered is varied with the opening of the throttle valve. With such an arrangement, it is enabled to simplify the circuitry of the apparatus. |
