The system 2 wherein said intake manifold temperature is varied in {HEAD ~ discrete steps} corresponding to idle, part open throttle, and {TAIL ~ wide open throttle operation} 
The system 2 wherein said intake manifold temperature is varied in { HEAD ~ discrete steps } corresponding to idle , part open throttle , and { TAIL ~ wide open throttle operation }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL