| 摘要 |
PURPOSE:To enable the feed of enough ignition energy throughout a range of from a low rotation region to a high rotation region through small and low-cost constitution, by performing input theoretical computation of a two or more phases output from an AC multiphase generator. CONSTITUTION:2-phase outputs Va1 and Va2 generated from a 3-phase multipole generator 1 driven by an internal combustion engine are fed through comparators 25 and 26, respectively, for shaping a waveform. By outputting output signals Vb1 and Vb2 from the comparators to an AND circuit 29, an output signal Vd can be generated. By inputting output signals Vb1 and Vb2 to an OR circuit 30, an output signal Vf can be generated. By inputting an output signal Ve and an output signal Vf, the polarities of which are inverted by an inverter 31, to an AND circuit 32, the polarity of an output signal Vd produces an electric angle to enable provision of a pi/3ON and pi/3OFF synchronous signal Vg. Since repetition of an ignition motion by means of the synchronous signal Vg increases the number of multiple charges of a capacitor 15 for ignition to a value two times as large as that of a conventional type, energy per one charging time may be reduced.
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