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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.
2NR-FE engine on a Toyota Sienta. A 1.5 L (1,496 cc) variant of the NR series engine, first introduced in the fourth quarter of 2010 for the Toyota Etios. It is the first new engine Toyota developed for over 8 years without VVT-i made to lower costs for the Toyota Etios.
The Toyota 4ZR-FE is a 1.6 L (1,598 cc) DOHC, 16-valve engine with Dual VVT-i. Output for this engine is rated at 117 hp (87 kW; 119 PS) at 6000 rpm and 150 N⋅m (111 lb⋅ft) of torque at 4400 rpm. It is an analogue of the 1ZR-FE for use in China only. Applications. Toyota Corolla EX (ZRE120) (China only) Toyota Yaris (ZSP91) (China only)
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).
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 KR engine family is a straight-3 piston engine, designed by Daihatsu, a subsidiary of Toyota. The 1KR series uses aluminium engine blocks and chain driven DOHC cylinder heads. It uses multi-point fuel injection, and has 4 valves per cylinder. Some versions have VVT-i variable valve timing. The engine is exceptionally light: 69 kg ...
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 ...
Other manufacturers may modify the engine after it has left the Toyota factory but the engine still keeps the original Toyota designation. For example, Lotus added a supercharger to the 2ZZ-GE in some versions of the Lotus Elise and Exige, but the engine is still labelled 2ZZ-GE, not 2ZZ-GZE. Examples: 3S-GTE 3S – Third model in the S engine ...