An internal combustion engine 1, wherein the air fuel ratio controller changes the air fuel ratio according to a temperature of the internal combustion engine upon completion of {HEAD ~ preheating} of {TAIL ~ the internal combustion engine} 
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An internal combustion engine 1 , wherein the air fuel ratio controller changes the air fuel ratio according to a temperature of the internal combustion engine upon completion of { HEAD ~ preheating } of { TAIL ~ the internal combustion engine }
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 HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL