| 摘要 |
PURPOSE:To prevent over-spark advance and reliably ignite at a low-speed, fixed position by detecting the operating timing of a constant-voltage control element with a power voltage saturation detecting means, driving a set circuit, and controlling an ignition timing control circuit in the rising process of the power voltage for the circuit. CONSTITUTION:The said device has an ignition timing control circuit 30 outputting an ignition timing signal according to the output of a sensor (not shown in the figure) detecting the first and second reference angle signals corresponding to the predetermined crank position and the other crank position delayed by a predetermined angle from the said position. It also has a voltage stabilizer 20 using the output of a magnetogenerator as the power voltage feed source for the circuit. In this case, a power voltage inhibiting means 40 including a set circuit 42 set by a signal from a power voltage saturation detection means 25 connected in series with a constant-voltage control element 24 in the voltage stabilizer 20 is provided. This inhibiting means 40 sets the ignition timing to the second reference angle position with a spark advance control circuit 300 composed of an AND circuit before the set circuit 42 is set. |
