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