| 摘要 |
PURPOSE:To simplify the adjustment of the characteristic of lead angle and reduce the change of the characteristic of lead angle caused by the secular change of the capacity of a condenser by using an ignition lead angle control means constructed of two integrating condensers for obtaining an ignition lead angle. CONSTITUTION:A pulser 1 is provided to detect the maximum and the minimum lead angle position synchronously with the revolution of an engine, and its output is inputted into a set terminal S of an FF 2 and a reset terminal R via an inverter 3. By the output of this FF 2, a condenser 2 constructing an integration circuit together with an OP amplifier 11 is charged via a Tr 8 to be on from the minimum lead angle position to the maximum. Meanwhile, the condenser 14 is discharged via a Tr 9 to be on from the maximum lead angle position to the minimum. The output of the OP amplifier 11 is inputted into an OR circuit 20 via a comparator 17 and an inverter 19 together with the output of an AND circuit 35, and an ignition circuit is controlled on the basis of the output signal thereof. |
