The (VVT)-Variable Valve Timing system further optimizes the timing of opening and closing the valves for multiple engine speeds.
The first-generation (VVT)-Variable Valve Timing design uses two-step variation which optimises the engine for two different engine speeds.
So, This design enables two different sets of timing which includes one for the ‘part-load’ condition and other for the ‘full-load’ condition. In addition, VVT-Variable Valve Timing more often improves performance and reduces emissions. Besides, VVT-Variable Valve Timing also provides the best of both worlds. Thus, it provides smooth idling at low rpm and maximum power at high rpm.
Furthermore, the newer generation VVT-Variable Valve Timing design implements ‘Continuous Variable Valve Timing’ or a CVVT system. Besides, the CVVT varies the valve timing continuously (or infinitely) which is digitally controlled by the engine ECU. In addition, it optimizes the valve timing for all engine speeds and conditions.
Apart from this, the CVVT uses the flexible hydraulic connection between the camshaft and its sprocket.