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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.
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.
The Toyota 1ZR-FE is a DOHC, 16-valve, 1.6 L (1,598 cc) engine equipped with dual VVT-i. This engine is available with either manual gearbox (5 or 6 Speed), a "multi-mode" manual transmission (MM-T 5 Speed) or an automatic gearbox (4 Speed). This new engine is now replacing the 3ZZ-FE engine in most applications. Output for this engine is rated ...
VVT-i variable valve timing was added in 1995, for an output of 147 kW (197 bhp; 200 PS) at 6000 rpm and 251 N⋅m (185 lb⋅ft) at 4000 rpm. The exterior design of the 1JZ-GE would later be reused with the 2JZ-GE in 1991, which shared most of its parts with the 1JZ-GE. The non-turbo, non-VVT-i 1JZ-GE is a non-interference engine.
The two numbers between the first and second letters denote the displacement of the engine in liters. The suffix denoting the features of the engine is still used, as with prior engines. Examples: M20A-FKS M20A is a 2.0-liter engine, as denoted by the "20" in "M20A" F – Normal cylinder head DOHC; K – On-demand Atkinson cycle in non-hybrid ...
The Toyota NZ engine family is a straight-4 piston engine series. The 1NZ series uses aluminum engine blocks and DOHC cylinder heads. It also uses sequential fuel injection , and has 4 valves per cylinder with VVT-i .
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