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