VVT-i Overview

VVT-i and VVTL-i technology represents a major step forward in engine performance and fuel efficiency, and confirms Toyota as a world leader in high efficiency, low emission engine technology. Due to technological constraints, in the past it was not possible for an engine to achieve 'high engine output', 'low fuel consumption' and 'clean exhaust gases'. However, these qualities have now been made possible through the adoption of the VVT-i and VVTL-i systems. VVT-i (variable valve timing – intelligent) uses a sophisticated computer system to control valve timing and ensure a constantly variable valve overlap. The result is higher torque output at all engine speeds, improved fuel efficiency, and reduced carbon monoxide, hydrocarbon and oxides of nitrogen emissions. Vehicles equipped with VVT-i systems are not only more responsive and easier to drive, they offer better performance than comparable vehicles of the same engine size.