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