an arrangement for evaluating at least one actual value of a variable characterizing {HEAD ~ a combustion} in at least one combustion chamber of {TAIL ~ the engine} 
an arrangement for evaluating at least one actual value of a variable characterizing { HEAD ~ a combustion } in at least one combustion chamber of { TAIL ~ the engine }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL