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