Toyota NZ engine

Last updated
Toyota NZ engine
1NZ-FXP Engine TOYOTA JPN TAXI NTP10 01.jpg
Overview
Manufacturer Toyota
DesignerYasushi Nouno, Hiroshi Tada, Toshifumi Takaoka [1]
Production
  • 1NZ-FXE: December 1997 [2] –present
  • 1NZ-FE: July 1999 [3] –present
  • 1NZ-FXP: 2017–present
  • 1NZ-FE Turbo: 2003–2013
  • 2NZ-FE: October 1999 [4] –2020
Layout
Configuration Naturally aspirated Straight-4
Displacement
  • 1,298 cc (1.3 L)
  • 1,497 cc (1.5 L)
Cylinder bore
  • 75 mm (3.0 in)
Piston stroke
  • 73.5 mm (2.89 in)
  • 84.7 mm (3.3 in)
Cylinder block material Aluminium
Cylinder head material Aluminium
Valvetrain DOHC 4 valves per cylinder with VVT-i
Valvetrain drive system Timing Chain
Compression ratio
  • 9.5:1–13.4:1 (hybrid)
  • 10.5:1–11.0:1 (naturally aspirated)
  • 10.5:1 (turbocharged)
  • 12.0:1 (CNG)
Combustion
Turbocharger IHI RHF4 turbo with intercooler
Fuel system Sequential fuel injection
Fuel type
Oil system Wet sump
Cooling system Water-cooled
Output
Power output 55–113  kW (75–153  PS; 74–151  hp)
Torque output 111–206  N⋅m (82–152  lb⋅ft; 11–21  kg⋅m)
Chronology
Predecessor
Successor Toyota NR engine

The Toyota NZ engine family is a straight-4 piston engine series. The 1NZ series uses aluminum engine blocks and DOHC cylinder heads. It also uses sequential fuel injection, and has 4 valves per cylinder with VVT-i.

Contents

The engines are produced by Toyota's Kamigo Plant in Toyota, Aichi, Japan (for Prius, Vitz, ist and Sienta); [3] by Siam Toyota Manufacturing in Chonburi, Thailand (1NZ for Yaris and Vios); [5] [6] and by Indus Motor Company in Karachi, Pakistan (2NZ for Corolla). [5]

1NZ-FXE

1NZ-FXE and electric motor Toyota Prius Motor.jpg
1NZ-FXE and electric motor

The 1NZ-FXE is a hybrid 1.5 L (1,497 cc) version. Bore and stroke is 75 mm × 84.7 mm (2.95 in × 3.33 in). It features forged steel connecting rods and an aluminum intake manifold. The engine has a high physical compression ratio of 13.0:1, but the closing of the inlet valve is delayed, for an effective compression ratio of 9.5:1. [7] The net result is that the engine has a greater effective expansion than compression—making it a simulated Atkinson cycle, rather than a conventional Otto cycle.

The reduction in cylinder charge means reduced torque and power output, but efficiency is increased. This combination makes the 1NZ-FXE suitable for use with the Hybrid Synergy Drive, where peak torque and power demands can be met by the electric motor and battery. Output is 57 kW (77 PS; 76 hp) at 5000 rpm with 115 N⋅m (85 lb⋅ft; 12 kg⋅m) of torque at 4000 rpm. Peak thermal efficiency is about 37%. [8] Production was discontinued in 2009, with the arrival of the 3rd generation Prius, which replaced the 1NZ-FXE with the 2ZR-FXE.

In 2012, upon the arrival of the Prius c (North America), the Aqua (Japan), and the Yaris Hybrid (Europe), an improved version was introduced. Without any belt-driven accessories, and a physical compression ratio of 13.4:1, the new version delivers an output of 55 kW (75 PS; 74 hp) at 4800 rpm with 111 N⋅m (82 lb⋅ft; 11 kg⋅m) of torque at 3600–4400 rpm.

The 1NZ-FXE Hybrid Synergy Drive in the Toyota Prius has won several International Engine of the Year awards:

Applications:

1NZ-FXP

1NZ-FXP 1NZ-FXP Engine TOYOTA JPN TAXI NTP10 01.jpg
1NZ-FXP

The 1NZ-FXP is a hybrid 1.5 L (1,497 cc) version. Bore and stroke is 75 mm × 84.7 mm (2.95 in × 3.33 in). It features forged steel connecting rods and an aluminum intake manifold. The engine has a high physical compression ratio of 13.0:1, but the closing of the inlet valve is delayed, for an effective compression ratio of 9.5:1. [11] The net result is that the engine has a greater effective expansion than compression—making it a simulated Atkinson cycle, rather than a conventional Otto cycle.

The reduction in cylinder charge means reduced torque and power output, but efficiency is increased. This combination makes the 1NZ-FXP suitable for use with the Hybrid Synergy Drive, where peak torque and power demands can be met by the electric motor, battery and LPG-hybrid system. Output is 57 kW (77 PS; 76 hp) at 5000 rpm with 115 N⋅m (85 lb⋅ft; 12 kg⋅m) of torque at 4000 rpm. Peak thermal efficiency is about 37%. [12]

Applications:

1NZ-FE

1NZ-FE Toyota 1NZ-FE engine 001.JPG
1NZ-FE

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. It retains the same bore and stroke, but the compression ratio is lowered to 10.5:1 (increased to 11.0:1 in 2012 for the Japanese market). Output is 76–81 kW (103–110 PS; 102–108 hp) at 6000 rpm with 132–143 N⋅m (97–105 lb⋅ft; 13–15 kg⋅m) of torque at 4200–4800 rpm. The redline is 6400 rpm. A CNG version called 1NZ-FNE was produced from April 2003, exclusively for the first generation Toyota Probox (NCP52V) until its discontinuation in 2014. It has 12.0:1 compression ratio, output is 68 kW (92 PS; 91 hp) at 6000 rpm with 125 N⋅m (92 lb⋅ft; 13 kg⋅m) of torque at 4000 rpm.

Applications:

1NZ-FE Turbo

Early version Vitz-RS-T-turbo-charger-kit.jpg
Early version
Latest version Toyota Vitz GRMN Turbo engine room.jpg
Latest version

The 1NZ-FE Turbo is a 1.5 L (1,497 cc) with an air-to-air intercooler turbocharged conventional Otto-cycle variant of the 1NZ-FE with VVT-i developed by Toyota Racing Development (TRD). The engine block is found in many Toyota models assembled in Asian countries. It retains the same bore and stroke, even the same 10.5:1 compression ratio as the naturally aspirated sibling. Output is 105–112 kW (143–152 PS; 141–150 hp) at 6000 rpm with 196–206 N⋅m (145–152 lb⋅ft; 20–21 kg⋅m) of torque at 4000–4800 rpm. The redline is 6400 rpm.

In Japan, this unique engine was available through modified Toyota cars (tuned by TRD or Modellista (ja)) and sold officially as complete car at Toyota dealers. The turbocharger kits is also available for sale at selected Toyota dealers or TRD official store. [13]

Applications:

2NZ-FE

The 2NZ-FE is a 1.3 L (1,298 cc) version. Bore and stroke is 75 mm × 73.5 mm (2.95 in × 2.89 in), with a compression ratio of 10.5:1. Output is 63–65 kW (84–87 hp; 86–88 PS) at 6000 rpm with 121–123 N⋅m (89–91 lb⋅ft; 12–13 kg⋅m) of torque at 4400 rpm. In 2000, it won the International Engine of the Year award in the 1-litre to 1.4-litre category. [14]

Applications:

Great Wall Motors version

In 2008, Great Wall Motors (GWM) introduced 1.3 L and 1.5 L engines codenamed GW4G13 and GW4G15. Despite the similar codes, they have nothing to do with the Mitsubishi 4G1x engines, but instead derived from NZ design. [15] [16] [17] For example, the NZ series are using timing chain to connect the crankshaft and camshafts, while the Mitsubishi 4G1x engines are using the less durable timing belt. Visually, this engine looks similar like the NZ engines such as the pulleys position and mechanically also share similarities such as the same bore x stroke size, engine displacement and interchangeable parts. [18] No statement from GMW or Toyota regarding the confirmation if these engines are officially licensed by GWM. But according the official press release by GWM in 2009, these GW4G1x engines were independently developed by themselves. [19]

The turbocharged variants of the 1.5 L engine called GW4G15T was introduced in 2011 and followed by the higher output GW4G15B in the following year. These engines were discontinued in 2019, replaced by the cleaner GW4G15F to comply with China's National V emission standard. Further new variants that comply with National VI emission standard codenamed GW4G15K, GW4G15M and the naturally aspirated hybrid GW4G15H are also produced.

GW4G13

Power: 68 kW (91 hp; 92 PS) at 6,000 rpm
Torque: 118 N⋅m (87 lb⋅ft; 12 kg⋅m) at 4,200 rpm

Applications:

GW4G15

Power: 78 kW (105 hp; 106 PS) at 6,000 rpm
Torque: 138 N⋅m (102 lb⋅ft; 14 kg⋅m) at 4,200 rpm

Applications:

GW4G15T

Power: 98 kW (131 hp; 133 PS) at 5,600 rpm
Torque: 188 N⋅m (139 lb⋅ft; 19 kg⋅m) at 2,000–4,500 rpm

Applications:

GW4G15B

Power: 110 kW (148 hp; 150 PS) at 5,600 rpm
Torque: 210 N⋅m (155 lb⋅ft; 21 kg⋅m) at 2,200–4,500 rpm

Applications:

GW4G15F

Power: 110 kW (148 hp; 150 PS) at 5,600–6,000 rpm
Torque: 210 N⋅m (155 lb⋅ft; 21 kg⋅m) at 1,800–4,400 rpm

Applications:

GW4G15K

Power: 110 kW (148 hp; 150 PS) at 5,500–6,000 rpm
Torque: 220 N⋅m (162 lb⋅ft; 22 kg⋅m) at 2,000–4,400 rpm

Applications:

GW4G15M

Power: 110 kW (148 hp; 150 PS) at 5,500–6,0000 rpm
Torque: 218 N⋅m (161 lb⋅ft; 22 kg⋅m) at 1,800–4,400 rpm

Applications:

GW4G15H

Power:
70 kW (94 hp; 95 PS) (engine)
110 kW (148 hp; 150 PS) (electric motor)
139 kW (186 hp; 189 PS) (combined)
Torque:
125 N⋅m (92 lb⋅ft; 13 kg⋅m) (engine)
250 N⋅m (184 lb⋅ft; 25 kg⋅m) (electric motor)
375 N⋅m (277 lb⋅ft; 38 kg⋅m) (combined)

Applications:

See also

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