VVT-i, or Variable Valve Timing with intelligence, is an automobile variable valve timing petrol engine technology manufactured by Toyota Group and used by brands Groupe PSA (Peugeot and Citroen), Toyota, Lexus, Scion, Daihatsu, Subaru, Aston Martin, Pontiac and Lotus Cars.

VVTL-i (Variable Valve Timing and Lift intelligent system) (also sometimes denoted as VVT-iL or Variable Valve Timing and Intelligence with Lift) is an enhanced version of VVT-i that can alter valve lift (and duration) as well as valve timing.

2001年6月1日 · In this article, we will cover the difference in valve lift mechanisms, cam design, intake manifolds, blocks, heads and overall performance. Honda's DOHC VTEC. The first to enter the boxing ring...

2002年7月30日 · VVTLi - uses VVTi but also has a twon profile cam and a rocker arm with a slipper follower under the high lift cam. Oil pressude pops a shim under teh slipper follower to activate lift.

2004年10月14日 · Instead of the on/off system that VTEC uses, VVTi offers continuous variable system that maximizes valve timing throughout the rpm range. Does this mean honda's vtec is not intelligent? The new accords finally upgarde from their older SOHCs to DOHCs, and along with that came iVTEC.

VVT-i (Variable Valve Timing with intelligence) is a similar system developed by Toyota and has several variants among which VVTL-i (Variable Valve Timing and Lift intelligent system) is analogous to VTEC.

2007年1月4日 · Since the introduction back in 1997, Toyota has developed a two-step, rpm-related variation of VVT-i called VVTL-i, which stands for Variable Valve Timing and Lift with Intelligence.

2015年7月14日 · The term VVTL stands for ‘ Variable Valve Timing and Lift ’ which is an advanced supporting system to alter the ‘lift’ of the valves. Nowadays, the ‘VVL’ system is being increasingly used in combination with ‘Variable Valve Timing’ (VVT) systems to …

2023年2月26日 · The VVTL-i system, which made its debut in the 1999 Toyota Celica SS-II but has since been phased out because it does not conform to Euro IV pollution standards, was developed then. When compared to i-VTEC, which also adjusts valve lift, VVT-i modifies timing.

2004年12月16日 · VVTL-i = hydraulically controlled lift, includes variable valve timing on the intake side.