{HEAD ~ This VVT} is controlled to change {TAIL ~ the valve overlap} of the intake valve and an exhaust valve, thereby adjusting the suction and exhaust in and from a combustion chamber 
is controlled to change
{ HEAD ~ This VVT } is controlled to change { TAIL ~ the valve overlap } of the intake valve and an exhaust valve , thereby adjusting the suction and exhaust in and from a combustion chamber
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH