An engine control apparatus can significantly improve {HEAD ~ reliability} in misfire detection by preventing {TAIL ~ erroneous detection} of the level of an ion current due to noise superposition 
An engine control apparatus can significantly improve { HEAD ~ reliability } in misfire detection by preventing { TAIL ~ erroneous detection } of the level of an ion current due to noise superposition
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH