Patent ID: 6534987
Filing Date: 2003-03-18
Classification: F02P

Abstract:
A magneto-system firing apparatus, comprising:a magnet fixed to a rotary shaft that interlocks with a crank shaft of an engine; a primary coil to which a low-voltage current that is generated due to the rotation of said magnet is supplied; a breaker which is connected to said primary coil and interrupts the low-voltage current supplied to said primary coil by its break operation; a secondary coil in which a predetermined voltage is induced due to the current interruption caused by the break operation of said breaker to actuate the firing apparatus by application of the voltage generated in said secondary coil; a crank angle detecting portion for detecting the rotating angle of said crank shaft; a breaker make/break state detecting portion for detecting the make/break state of said breaker; and a breaker failure detecting device having a breaker make/break abnormality detecting portion which is capable of detecting the abnormal state of the breaker make/break operation on the basis of information from said crank angle detecting portion and said breaker make/break state detecting portion.