A spark plug is disposed so that its discharge electrode portion is in {HEAD ~ the proximal area} of the fuel from {TAIL ~ the fuel injection valve} 
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A spark plug is disposed so that its discharge electrode portion is in { HEAD ~ the proximal area } of the fuel from { TAIL ~ the fuel injection valve }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL