| 摘要 |
PURPOSE:To simplify a circuit structure by comparing the first integral voltage with the second and third integral voltage, generating a trigger signal, and obtaining spark advance angle and spark delay angle characteristics via a common trigger signal output circuit for spark advance angle and spark delay angle control. CONSTITUTION:The first integral voltage Vc1 and the maximum spark advance angle position is constant, but the first integral voltage Vc1 at the minimum spark advance angle position is gradually decreased as the rotating speed is increased. The second integral voltage Vc2 at the maximum spark advance angle position is increased as the rotating speed is increased. The third integral voltage Vc3 at the maximum spark advance angle and the minimum spark advance angle is decreased as the rotating speed is increased. Accordingly, the first integral voltage Vc1 is compared with the second and third integral voltage Vc2, Vc3 so that a trigger signal is generated when the voltage Vc1 becomes higher than both Vc2 and Vc3. Then, various ignition characteristics that the spark angle is advanced at low and medium-speed regions and delayed at a high-speed region can be obtained by properly setting the integration constant of each integrating circuit.
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