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