| 摘要 |
PURPOSE:To prevent a power loss in the low speed range of an engine, by controlling transistors with no addition to an input signal at a speed of the engine below a prescribed level while performing closed angle control at its high speed rotation. CONSTITUTION:A comparator 100 is provided in a control circuit, comparing the electric potential of a capacitor 69 relating to a rotary speed with the preset value by resistors 101, 102, and when the rotary speed exceeds a specified value, a transistor 104 is turned off, controlling a closed angle control circuit by a comparator 77 so as to function. When the rotary speed is below the specified value, the comparator 100 and the transistor 104 are turned on, and a transistor 61 is turned off whether or not an output is generated from the comparator 77, controlling output transistors 85, 84 only by inversion of an input signal. In this way, the closed angle control with less power loss can be performed in the wide speed range. |
