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