| 摘要 |
PURPOSE:To prevent the magnetic flux of a core projection for an ignition power source from varying by providing a breakdown unit at the coupling portion of a projection on which a coil for an ignition power source of the core is wound and a projection on which a coil for a load is wound. CONSTITUTION:A breakdown unit 31e is provided at the coupling portion between a core projection 31d for an ignition power source and a core projection 31c for a night load. Thus, since a magnetic flux phi2 passing the projections 31d, 31c is not almost flowed, the magnetic flux flowed to the projection 31d does not vary only with phi3 even if the load varies at between the daylight and the night so that the magnetic flux flowed to the projection 31c varies. Accordingly, the output of the coil 6 is not almost affected, thereby preventing the ignition timing and the ignition output from varying even if the load varies at between the daylight and the night. |
