The goal is to increase the air entering the cylinder and thus burning more gasoline. The requirement of varying the different parameters is to allow more fuel to burn at high rpm, to give the good torque at high rpm and also to let more fuel to enter the cylinder during cold start.
Name of this technology by different automobile companies
VTVT (Hyundai)
VVT-i (Toyota)
i-VTEC (Honda)
VCT (Ford)
VVL (Nissan)
Vario Cam (Porsche)
Valuelift (Audi)
VVT-i (Toyota)
i-VTEC (Honda)
VCT (Ford)
VVL (Nissan)
Vario Cam (Porsche)
Valuelift (Audi)
Working of VTVT
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