What does VVT on the engine mean?

[AdrianaLee]

VVT on the engine stands for Variable Valve Timing system. It adjusts the phase of the engine camshaft through the equipped control and execution system, allowing the timing of valve opening and closing to vary with engine speed. This enhances air intake efficiency and increases engine power. The Chinese meaning of VVT engine is "Variable Valve Timing." Since it is controlled by an Electronic Control Unit (ECU), Toyota has given it a pleasant Chinese name called "Intelligent Variable Valve Timing System." The VVT-i system is the English abbreviation for Toyota's Intelligent Variable Valve Timing system, and the engines of newer Toyota cars are generally equipped with the VVT-i system.