Toyota's VVT-i system is being discussed. Technician A says the VVT-i system controls valve overlap. Technician B says the VVT-i timing mechanism allows up to four distinct camshafts "settings". Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because Toyota's Variable Valve Timing with intelligence (VVT-i) system is designed to control the timing of the intake valves to improve performance, fuel economy, and emissions. It does this by adjusting the valve overlap, which is the period when both the intake and exhaust valves are open. Technician B is incorrect because the VVT-i system does not offer distinct camshaft "settings" but rather continuously varies the camshaft timing.

Toyota's VVT-I System Is Being Discussed