DVVT is a variable valve timing system.

DVVT of England (Dynamic Variable Valve Timing) is a dynamic variable valve timing system. Shooting camshaft pushes the beginning of the opening of valves, thus achieve better performance cylinder engine in all driving modes. Filming is controlled electronically according to engine speed and accelerator pedal position. The system increases and optimizes the performance and conduct of the Torque engine. This system uses such as Daihatsu, like other operating systems such as V-Tec, VVTI, Vanos,… .

Source: http://www.mo­tortrader.com­.my