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