An angular position detector generates a reference position signal representative of a predetermined crank angle of {HEAD ~ each engine cylinder} in {TAIL ~ synchronism} with the rotation of an internal combustion engine 
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An angular position detector generates a reference position signal representative of a predetermined crank angle of { HEAD ~ each engine cylinder } in { TAIL ~ synchronism } with the rotation of an internal combustion engine
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH