The answer is tech A is correct
says that variable valve timing allows better control.
Variable valve timing (VVT), which modifies the timing of a valve lift event in internal combustion engines,
What does variable valve timing accomplish?
Variable valve timing (VVT), which modifies the timing of a valve lift event in internal combustion engines, is frequently applied to enhance output, fuel efficiency, or pollution. It is increasingly combined with systems that have variable valve lift.
advantages of VVT
Utilizing VVT has a lot of advantages and hardly any disadvantages. One advantage is a 25% increase in maximum engine speed, which results in more peak power. Additionally, low speed torque is boosted, improving driving dynamics.
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