a bypasses flow rate control valve configured to control {HEAD ~ a flow rate} of {TAIL ~ the exhaust gas} flowing in the bypass path, 
of
a bypasses flow rate control valve configured to control { HEAD ~ a flow rate } of { TAIL ~ the exhaust gas } flowing in the bypass path ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH