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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 ...
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 ...
The Corolla EX was originally powered by a 1.6 L 3ZZ-FE VVT-i engine upon introduction, which produces 81 kW (109 hp). The later versions were powered by a 1.6 L 1ZR-FE dual VVT-i engine producing 91 kW (122 hp) [18] or the 1.6 L 4ZR-FE dual VVT-i engine producing 87 kW (117 hp). Various facelifts occurred between 2010 and 2013.
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 Toyota GR engine family is a gasoline, open-deck, piston V6 engine series. The GR series has a 60° die-cast aluminium block and aluminium DOHC cylinder heads.This engine series also features 4 valves per cylinder, forged steel connecting rods and crankshaft, one-piece cast camshafts, a timing chain, [1] and a cast aluminium lower intake manifold.
The Aygo Crazy has a Japanese-built 1ZZ-FE 1.8 litre VVT-i engine, mated to a five speed manual gearbox, both from the Toyota MR2, fitted with a Toyota Motorsport turbocharger conversion. The manufacturer claims the engine produces 147 kW (197 bhp) at 6,700 rpm and 240 N⋅m (177 lb⋅ft) torque at 3,400 rpm.
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