Toyota NR engine

The Toyota NR engine family is a series of small inline-four piston engines designed and manufactured by Toyota, with capacities between 1.2 and 1.5 litres (1,197 and 1,498 cc).
The NR series uses aluminium engine blocks and cylinder head. 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 cycle to improve thermal efficiency.
The 1NR-FE is a compact 1.3-litre inline-four piston engine featuring Stop & Start technology and Dual VVT-i. It was introduced into the European market in late 2008 with the Yaris XP9F. Improved engine performance combined with low emissions and fuel consumption was the principal aim during its development.
Advanced engineering has been applied throughout the 1NR-FE engine. Toyota engineers streamlined the engine's intake channel, used computer simulation to optimize airflow, smoothened all surfaces for less turbulence and rounded off all angles and sharp edges inside the engine. One of the key elements of the 1NR-FE engine is its piston design. Smaller and lighter than on the previous 1.3 L (1,297 cc) unit, they are designed with a smaller contact area and use carbon ceramide, an advanced material commonly used in Formula One engineering, to reduce friction. The engine also features cooled exhaust gas recirculation (cold area specification models only) to reduce pumping losses and reduce NOx emissions.
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The new 1NR-VE engine was improvised by Daihatsu for the Toyota Avanza and Daihatsu Xenia, and then later used by Perodua for the Perodua Bezza, which is based on the 1.3-litre 1NR-FE. It has ECE fuel consumption figures of 21.7 km/L (4.6 L/100 km; 51 mpg‑US; 61 mpg‑imp) for the manual variant and 21 km/L (4.8 L/100 km; 49 mpg‑US; 59 mpg‑imp) for the automatic. The engine produces 69–73 kW (93–98 hp) and 121 N⋅m (89 lbf⋅ft) of torque.
The Perodua Bezza Advance variant and all variants of the new third generation Myvi are capable of 22 km/L (4.5 L/100 km; 52 mpg‑US; 62 mpg‑imp), courtesy of the new Eco Idle stop-start system and regenerative braking better than the previous generation engines.
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Fitted to the Toyota Etios and Yaris hatchback made in Brazil, available only as a flexfuel, 1.3 litre, with VVT-i. Replaced by a flexfuel version of the 1NR-FKE in 2016.
The 1NR-FKE is a variant of the 1NR-FE introduced in the second quarter of 2014. Toyota claims it will have a maximum thermal efficiency of 38 per cent. This 1.3-litre petrol engine is employing the Atkinson cycle like hybrid-dedicated Toyota engines. The maximum torque is lesser, but, this time, the maximum output is not reduced. Valves are driven with Variable Valve Timing-intelligent Electric VVT-iE. The intake port has a new shape that generates a strong vertical tumble flow. Combustion is improved, and loss reduced. Toyota says that with idling stop and other functions, it will lead to fuel efficiency gains of approximately 15 per cent.
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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. A new innovation was introduced to this engine with the integration of the exhaust manifold into the cylinder head to reduce emissions. A Dual VVT-i equipped version was later introduced and first used in Toyota Avanza and in many 1.5L models in the Asian market from the 2017 model year.
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Based on the 1.5-litre 2NR-FE engine, The 2NR-VE was adapted by Daihatsu for its products and it's also used by Toyota for their products based on Daihatsu New Global Architecture (DNGA). An idle stop-start system is introduced for the Perodua Myvi and Toyota Rush (since 2021) to enhance fuel efficiency. The commercial variant used in the Daihatsu Gran Max has different output adjustment but still features Dual VVT-i.
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Compression Ratio: 11.5:1; Indonesian Euro 4 version: 10.5:1
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Based on the 1.5-litre 2NR-VE engine, the 2NR-VEX unit is an Atkinson cycle engine used with a hybrid system paired with an electric motor and a lithium-ion battery.
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A flex fuel engine for the Etios in Brazil. It can run on gasoline or any mixture of gasoline and ethanol, up to full ethanol (E100).
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Implements variable valve timing system VVT-iE and engine operation by Miller / Atkinson cycle.
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A 1.2 L (1,197 cc) variant of the NR series engine. First introduced in the second quarter of 2011 for the Etios Liva. Toyota later implemented Dual VVT-i mechanism and increased the compression ratio to 11.5:1 for Toyota Yaris models (Thailand).
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A Daihatsu variant of the 3NR-FE. Some technologies used in the Daihatsu-made 3NR-VE engine are:
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Implements variable valve timing system VVT-iE and engine operation by Miller / Atkinson cycle.
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A 1.3 L (1,329 cc) variant of the NR series engine. First introduced for the third generation Toyota Vios.
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A 1.5 L (1,496 cc) variant of the NR series engine. First introduced for the third generation Toyota Vios.
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A 1.3 L (1,329 cc) variant of the NR series engine. First introduced for the third generation Toyota Yaris.
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A 1.5 L (1,498 cc) variant of the NR series engine. First introduced for the third generation Toyota Yaris.
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A 1.2 L (1,197 cc) turbocharged variant of the NR series engine. First introduced in the Toyota Auris in 2015. It uses direct injection.
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A version of 8NR-FTS built for Chinese-market Corolla/Levin.
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