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