The present invention provides an engine capable of increasing an introducing amount of an EGR gas without reducing {HEAD ~ an introducing amount} of {TAIL ~ a fresh air} 
of
The present invention provides an engine capable of increasing an introducing amount of an EGR gas without reducing { HEAD ~ an introducing amount } of { TAIL ~ a fresh air }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL