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