An engine control parameter setter sets a control parameter for the engine in {TAIL ~ accordance} with the reference position signal and {HEAD ~ the engine operating state} 
An engine control parameter setter sets a control parameter for the engine in { TAIL ~ accordance } with the reference position signal and { HEAD ~ the engine operating state }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD