establishing a slope and an offset of the linear function as a function of at least one parameter including the speed of the internal combustion engine, cylinder number, inlet pipe geometry, {TAIL ~ air temperature} in the inlet pipe and {HEAD ~ valve control times} 
establishing a slope and an offset of the linear function as a function of at least one parameter including the speed of the internal combustion engine , cylinder number , inlet pipe geometry , { TAIL ~ air temperature } in the inlet pipe and { HEAD ~ valve control times }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD