Toyota NR engine

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2NR-FE engine on a Toyota Sienta

The Toyota NR engine family is series of small inline four piston engines by Toyota, with capacities between 1.2 and 1.5 L.

Common features of this series[edit]

The NR series uses aluminum engine blocks and DOHC cylinder heads. It also uses multi-point or direct fuel injection and has four valves per cylinder. 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.

1NR-FE[edit]

The 1NR-FE is a compact inline four piston engine featuring "Stop & Start" technology and Dual VVT-i. It was introduced into 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 optimise 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 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.

Technical specifications of the engine:

  • Displacement: 1,329 cc (81.1 cu in)
  • Bore x Stroke: 72.5 mm × 80.5 mm (2.85 in × 3.17 in)
  • Max. Output: Euro 4 Version: 74 kW (99 bhp) at 6000 rpm, Euro 5 Version: 73 kW (98 bhp) at 6000 rpm, Indonesia Euro 3 Version: 72 kW (97 bhp) at 6000 rpm, Malaysia version: 71 kW (95 bhp) at 6000 rpm
  • Max. Torque: Euro 4 Version: 132 N⋅m (97.4 lb⋅ft) at 3800 rpm, Euro 5 Version: 128 N⋅m (94.4 lb⋅ft) at 3800 rpm, Indonesia Euro 3 Version: 120 N⋅m (88.5 lb⋅ft), Malaysia Version: 121 N⋅m (89.2 lb⋅ft) at 4000 rpm
  • Compression Ratio: 11.5:1; Indonesia Euro 3 Version: 10.5:1
  • Valve Mechanism: 16-valve DOHC, Chain Drive (with Dual VVT-i)
  • Fuel Injection System: EFI
  • Ignition System: Direct Ignition System
  • Emission Regulation: Euro 4 (Complies with Euro 5 after optimizations introduced in July 2010)
  • Engine Service Mass (incl. coolant & oil): 89.5 kg (197 lb)
  • 6200 RPM Red Line

Applications:

1NR-VE[edit]

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-liter 1NR-FE. It has ECE fuel consumption figures of 21.7 km/L (4.6 L/100 km; 51.0 mpg‑US; 61.3 mpg‑imp) for the manual variant and 21.0 km/L (4.8 L/100 km; 49.4 mpg‑US; 59.3 mpg‑imp) for the automatic. The Perodua Bezza Advance variant and all variants of the new third generation Myvi are capable of 22.0 km/L (4.5 L/100 km; 51.7 mpg‑US; 62.1 mpg‑imp), courtesy of the new Eco Idle stop-start system and regenerative braking better than the previous generation engines.

Applications:

1NR-FBE[edit]

Fitted to the Toyota Etios hatchback made in Brazil, available only as a flexfuel, without VVT-i. Replaced by a flexfuel version of the 1NR-FKE in 2016.

1NR-FKE[edit]

The 1NR-FKE is a variant of the 1NR-FE introduced in the second quarter of 2014.[2] Toyota claims it will have a maximum thermal efficiency of 38 percent. Major feature, this 1.3-liter gasoline 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 percent.

Main differences between 1NR-FE :

  • Max. Output: 73 kW (98 bhp) at 6000 rpm
  • Max. Torque: 121 N⋅m (89.2 lb⋅ft) at 4400 rpm
  • Max. thermal efficiency : 38%
  • Expansion ratio: 13.5:1
  • Valve Mechanism: VVT-iE

Applications:

2NR-FE[edit]

A 1.5 (1496 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. Done to reduce cost for the low-cost Toyota Etios. A new innovation that made its introduction on this engine is the integration of the exhaust manifold into the cylinder head[5] to reduce emissions. A dual VVT-i equipped version was first used in Toyota Avanza.[6]

Technical specifications of the engine:

  • Displacement: 1496 cc
  • Bore x Stroke: 72.5 mm × 90.6 mm (2.85 in × 3.57 in)
  • Max. Output:
    • 66 kW (90 PS) at 5600 rpm (w/o Dual VVT-i)
    • 79 kW (107 PS) at 6000 rpm (with Dual VVT-i)
  • Max. Torque:
    • 132 N⋅m (97 lbf⋅ft) at 3000 rpm (w/o Dual VVT-i)
    • 140 N⋅m (103 lbf⋅ft) at 4200 rpm (with Dual VVT-i)
  • Compression Ratio: 11.5:1; Indonesian Euro 3 version: 10.5:1
  • Idling speed: 700 rpm
  • Redline: 6.200 rpm

Applications:

2NR-VE[edit]

The new 2NR-VE engine was improvised by Daihatsu for the Toyota Avanza 1.5 litre models, which is based on the 1.5-liter 2NR-FE engine. Unlike the original 2NR-FE that is mated to the Toyota Sienta, which is using an aluminium block and is positioned transversely, the 2NR-VE that is commonly found on the 1.5-liter Avanza is still using high-tensile steel like its predecessor, the 3SZ-VE engine, and is positioned longitudinally. Thus, the 2NR-VE in the Avanza is Rear-wheel drive.[7]. The all new third generation Perodua Myvi revised this engine and installed the new Eco Idle stop-start system which was implemented in Perodua Bezza before to enhance fuel efficiency than before.

Max Power

  • 76 kW (104 PS) at 6000 rpm (with Dual VVT-i on Toyota Avanza)

Max Torque

  • 136 N⋅m (100 lbf⋅ft) at 4200 rpm (with Dual VVT-i on Toyota Avanza)
  • Compression Ratio: 11.5:1; Indonesian Euro 3 version: 10.5:1

Applications:

2NR-FBE[edit]

A flex fuel engine for the Etios in Brazil. It can run on petrol or any mixture of petrol and ethanol, up to full ethanol (E100).

Main differences between 2NR-FE:

  • Max. Power output: 71 kW (108 hp) at 5600 rpm
  • Max. Torque: 136 N•m at 3100 rpm

Applications:

  • Toyota Etios (Brazil only)
  • Toyota Vios (2016 Thailand Minor Change)

2NR-FKE[edit]

Implements variable valve timing system VVT-iE and engine operation by Miller / Atkinson cycle.[8]

Main differences between 2NR-FE :

  • Max. Output: 80 kW (109 PS) at 6000 rpm
  • Max. Torque: 136 N⋅m (100.3 lb⋅ft) at 4400 rpm
  • Expansion ratio: 13.5:1

Applications:

3NR-FE[edit]

A 1.2 (1197 cc) variant of the NR series engine. First introduced in the second quarter of 2011 for the Etios Liva. For development Toyota build 3NR-FE with Dual VVT-i mechanism and increasing compression ratio to 11.5 : 1 for Toyota Yaris (Thailand).

Technical specifications of the engine:

  • Displacement: 1197  cc
  • Bore x Stroke (mm.) 72.5 x 72.5
  • Compression Ratio 11.5 : 1; Indonesia Euro 3 Version: 10.5 : 1
  • Max. Output: 65 kW (88 PS) at 5600 rpm / 65 kW (88 PS) at 6000 rpm (with Dual VVT-i)
  • Max. Torque: 104 N⋅m (77 lbf⋅ft) at 3100 rpm / 108 N⋅m (80 lbf⋅ft) at 4200 rpm (with Dual VVT-i)

Applications:

4NR-FE[edit]

A 1.3 (1329 cc) variant of the NR series engine. First introduced for the third generation Toyota Vios.

Technical specifications of the engine:

  • Displacement: 1329 cc
  • Max. Output: 73 kW (99 PS) at 6000 rpm
  • Max. Torque: 123 N⋅m (91 lbf⋅ft) at 4200 rpm

Applications:

5NR-FE[edit]

A 1.5 (1496 cc) variant of the NR series engine. First introduced for the third generation Toyota Vios.

Technical specifications of the engine:

  • Displacement: 1496 cc
  • Max. Output: 79 kW (107 PS) at 6000 rpm
  • Max. Torque: 140 N⋅m (103 lbf⋅ft) at 4200 rpm

Applications:

6NR-FE[edit]

A 1.3 (1329 cc) variant of the NR series engine. First introduced for the third generation Toyota Yaris.

Technical specifications of the engine:

  • Displacement: 1329 cc
  • Max. Output: 73 kW (99 PS) at 6000 rpm
  • Max. Torque: 123 N⋅m (91 lbf⋅ft) at 4200 rpm

Applications:

7NR-FE[edit]

A 1.5 (1498 cc) variant of the NR series engine. First introduced for the third generation Toyota Yaris.

Technical specifications of the engine:

  • Displacement: 1498 cc
  • Max. Output: 79 kW (107 PS) at 6000 rpm
  • Max. Torque: 140 N⋅m (103 lbf⋅ft) at 4200 rpm

Applications:

8NR-FTS[edit]

A 1.2 (1197 cc) turbocharged variant of the NR series engine. First introduced in the Toyota Auris in 2015.[10] It uses direct injection.

Technical specifications:

  • Displacement: 1197 cc
  • Bore x Stroke: 71.5 mm × 74.5 mm (2.81 in × 2.93 in)
  • Max. Output: 85 kW (114 hp) at 5200 rpm
  • Max. Torque: 190 N⋅m (140 lbf⋅ft) at 1500 rpm
  • Max. thermal efficiency : > 36%
  • Compression ratio: 10.0:1
  • Valve Mechanism: VVT-iW

Applications:

References[edit]

  1. ^ "Toyota Avanza New Features, Engine Details & Specifications". AutonetMagz.com. Indonesia. Retrieved 2015-07-24. 
  2. ^ [1] Toyota press presentation of news engines - 2014-04-10
  3. ^ [2] Japanese specs of Toyota Vitz - April 2014
  4. ^ [3] Improvement of Subaru Tresia - May 2014
  5. ^ [4] Toyota Etios Launch Site
  6. ^ "Toyota Avanza New Features, Engine Details & Specifications". AutonetMagz.com. Indonesia. Retrieved 2015-07-24. 
  7. ^ [otomotif.kompas.com/read/2016/04/08/083200215/Bedanya.Mesin.Sienta.dengan.Avanza]
  8. ^ "2NR-FKE". toyota-club.net. 
  9. ^ [5] Japanese specs of Toyota Corolla Axio - April 2015
  10. ^ Panait, Mircea (2015-04-06). "Toyota 8NR-FTS 1.2L Turbo Engine Detailed". autoevolution. Retrieved 2015-04-15.