VVT-i

VVT-i, or Variable Valve Timing with intelligence, යනු මෝටර් රථවල variable valve timing තාක්ෂණයකි. ටොයොටා සමාගම විසින් දියුණුකල මෙ‍ම ක්‍රමය, similar in performance to the BMW's VANOS. The Toyota VVT-i system replaces the Toyota VVT offered starting in 1991 on the 5-valve per cylinder 4A-GE engine. The VVT system is a 2-stage hydraulically controlled cam phasing system.

VVT-i, introduced in 1996, varies the timing of the intake valves by adjusting the relationship between the camshaft drive (belt, scissor-gear or chain) and intake camshaft. Engine oil pressure is applied to an actuator to adjust the camshaft position.

Video animation of VVT-i (courtesy of PT. Toyota Astra Motor, Indonesia) can be found here [1].


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