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