| 摘要 |
PURPOSE:To prevent excessive revolutions of an engine by furnishing a closed loop angle reduction circuit, which reduces the closed loop angle of an ignition coil in the current application period for the ignition coil in accordance with increase of revolutions of the internal-combustion engine. CONSTITUTION:If the current application period for an ignition coil 4 is so controlled as to be shortened with rising number of revolutions of the engine in order to lower the ignition voltage, it will become below the requisite ignition voltage to cause misfires and drop of the number of revolutions of the engine. If thereafter the number of revolutions of the engine lowers, the closed loop angle becomes large, the engine is ignited and its number of revolutions rises. The engine attains a balance at a certain number of revolutions thus by repeating ignitions and misfires by means of change of ignition voltage, and excessive revolutions is now prevented. This close loop angle reduction circuit is so designed as to be capable of reducing the closed loop angle in a revolution's range over 50rpm to ensure improvement of maneuverability and feeling. |
