What is the function of VVT?

The whole function of VVT-i engine is variable valve timing. Lift-intellectualization, in the original VVT-i engine camshaft, more cams with different angles can be switched, and the rocker mechanism is adopted to decide whether to push the cam with high angle or the cam with small angle, so that the timing (timing), overlapping time (overlapping phase angle) and "two-stage" lift (lift) of the engine can be changed continuously.

How to change the valve timing of VVT-i engine during intake? There is a VVT-I control panel to rotate this control panel to advance or delay the opening and closing time of the valve. VVT-i adopts similar mechanism to realize "continuous" variable valve timing, and different engine speeds realize continuous change of valve timing!

In order to overcome the problem that the same engine needs both high speed and high horsepower and low speed and high torque, VVT-i directly changes the timing and duration of intake and exhaust () to solve the problem.