How does a variable valve timing work?

Variable valve timing (VVT) is a technology used in internal combustion engines to optimize performance, efficiency, and emissions by adjusting the timing of the opening and closing of the engine's intake and exhaust valves. This is achieved through mechanisms like adjustable camshafts or hydraulic actuators that alter the valve timing based on engine speed and load. By varying the timing, VVT allows for improved engine performance at different RPMs, enhancing low-end torque and high-end power. Ultimately, VVT helps engines deliver better fuel efficiency and reduced emissions.