What does engine VVT mean?

[EllieDella]

Engine VVT refers to the Variable Valve Timing system. This system adjusts the phase of the engine camshaft through its equipped control and execution system, allowing the timing of valve opening and closing to vary with engine speed. This improves air charging efficiency and increases engine power. Working principle of the Variable Valve Timing system: When the engine shifts from low to high speed, the electronic computer automatically directs oil pressure to the small turbine inside the intake camshaft drive gear. Under this pressure, the small turbine rotates a certain angle relative to the gear housing, causing the camshaft to rotate forward or backward within a 60-degree range. This changes the timing of the intake valve opening, achieving continuous adjustment of valve timing.