comparison means for comparing {HEAD ~ said detected vale} read by said reading means with a reference value to thereby generate {TAIL ~ said misfire detection signal} if said detected value is less than said reference value 
comparison means for comparing { HEAD ~ said detected vale } read by said reading means with a reference value to thereby generate { TAIL ~ said misfire detection signal } if said detected value is less than said reference value
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH