The controller consults the map to determine the new engine speed corresponding to the new power demand and operates the throttle to cause {HEAD ~ the engine} to run at {TAIL ~ the new speed} 
The controller consults the map to determine the new engine speed corresponding to the new power demand and operates the throttle to cause { HEAD ~ the engine } to run at { TAIL ~ the new speed }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL