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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 ...
This allows the engine to deliver high power, but also to work tractably and efficiently at low power. [1] There are many systems for VVT, which involve changing either the relative timing, duration or opening of the engine's inlet and exhaust valves.
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 engine series shares many of the technologies in the AZ engine, while incorporating features such as variable valve timing on both intake and exhaust camshafts or dual VVT-i, low friction technologies including an offset crankshaft, roller rockers for the valvetrain, a three-stage variable oil pump, reduced-tension piston rings and ...
A Toyota 1TR-FE engine, found in 2004-2015 Toyota Innova. The 1TR-FE is a 2.0 L (1,998 cc) Straight-4 gasoline engine.It features DOHC, 16 valves and VVT-i.Bore and stroke is 86 mm × 86 mm (3.39 in × 3.39 in).
1NZ-FE engine Updated Japanese market 1NZ-FE engine with different plastic engine cover. The 1NZ-FE is a 1.5 L (1,497 cc) conventional Otto-cycle variant of the 1NZ-FXE with VVT-i on the intake camshaft. The engine block is found in many Toyota models assembled in Japan and Asian countries.