| 摘要 |
PURPOSE:To prevent a firing circuit from erroneously operating by disposing a pulser to be excited by other magnet inside a main generator having a magnet generator. CONSTITUTION:When a flywheel and a pulser rotor 11 are rotated in response to the rotation of an engine and the pole piece 19B of a stator core 19 and the state that a central pole piece 21 approach N-poles and pole piece 19C approaches a S-pole is shifted to the state that the piece 21 is altered to the S-pole, an abrupt variation in a magnetic flux occurs in a pulser coil 20, and the coil 20 outputs an output voltage. The waveform of the pulser voltage is induced in the coil 20 when the pieces 21 of a pulser stator 12 move to steps 16C, 17C, the output of the same phase is applied to a stepped portion 17D at the coil 20 in addition to a normal firing signal voltage. As a result, two pulse outputs are generated. Thus, the generated voltage of a noise is suppressed to prevent a firing circuit from erroneously operating.
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