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Cutaway view of Variable Valve Timing with intelligence on a ZR engine in Techniquest Glyndŵr. 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.
Fiat 875 cc two cylinder TwinAir engine featuring Multiair technology. MultiAir or Multiair is a hydraulically-actuated variable valve timing (VVT) and variable valve lift (VVL) engine technology enabling "cylinder by cylinder, stroke by stroke" [1] control of intake air directly via a gasoline engine's inlet valves.
The Toyota 1ZR-FAE is a DOHC, 16-valve, 1.6 L (1,598 cc) engine also equipped with Dual VVT-i and Valvematic. Output for this engine is rated at 132 hp (98 kW) at 6400 rpm and 118 lb⋅ft (160 N⋅m) of torque at 4400 rpm for most applications. Compression ratio has been increased to 10.7:1, red line is at 6600 rpm.
Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with variable valve lift systems.
1,986 cc 3ZR-FAE DOHC 16-valve EFI straight-four with Dual VVT-i and Valvematic: Super CVT-i with 7-speed simulation 111 kW (149 hp; 151 PS) at 6,100 rpm 193 N⋅m (142 lb⋅ft) at 3,800 rpm 2013–2020 ASU60 (FWD) ASU65 (4WD) 1,998 cc 8AR-FTS DOHC 16-valve EFI turbocharged straight-four with VVT-iW and D-4ST 6-speed U661 automatic
Alfa Romeo was the first manufacturer to use a variable valve timing system in production cars (US Patent 4,231,330). The 1980 Alfa Romeo Spider 2.0 L had a mechanical VVT system in SPICA fuel injected cars sold in the US. Later this was also used in the 1983 Alfetta 2.0 Quadrifoglio Oro models as well as other cars.
Editor's Note: This page is a summary of news on drone sightings for Tuesday, Dec. 17. For the latest news, view our story for Wednesday, Dec. 18. The FBI has received tips involving over 5,000 ...
The valve mechanism is equipped with 4-Valves per cylinder, DOHC, and implemented Toyota's Dual VVT-i and VVT-iW. It also uses multi-point or direct fuel injection . The 1NR, 2NR, 3NR, 4NR, 5NR, 6NR, and 7NR engines have Dual VVT-i standard and the 8NR engine has VVT-iW , enabling it to operate in the Otto cycle as well as a modified- Atkinson ...
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