At a predetermined time, to be hereinafter described, {TAIL ~ a valve} 78 is opened in {HEAD ~ a supplemental fuel line connecting line} 76 to sprayring 74 
At a predetermined time , to be hereinafter described , { TAIL ~ a valve } 78 is opened in { HEAD ~ a supplemental fuel line connecting line } 76 to sprayring 74
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH