Toyota NZ engine

Toyota NZ engine

Overview
Manufacturer	Toyota
Designer	Yasushi Nouno, Hiroshi Tada, Toshifumi Takaoka^[4]
Production	1NZ-FXE: from December 1997^[1] 1NZ-FE: from July 1999^[2] 1NZ-FXP: from 2017 1NZ-FE Turbo: from 2004 2NZ-FE: from October 1999^[3]
Layout
Configuration	Naturally aspirated Straight-4
Displacement	1,299 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
Combustion
Turbocharger	IHI RHF4 turbo with intercooler
Fuel system	Sequential fuel injection
Fuel type	Petrol
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	74–148 hp (75–150 PS; 55–110 kW)
Torque output	111–200 N⋅m (11–20 kg⋅m; 82–148 lb⋅ft)
Chronology
Predecessor	Toyota E engine
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.

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

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1NZ-FXE

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 76 hp (57 kW; 77 PS) at 5000 rpm with 115 N⋅m (85 lb⋅ft) 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 74 hp (55 kW; 75 PS) at 4800 rpm with 111 N⋅m (82 lb⋅ft) 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:

Best Eco-friendly 2000
Best Eco-friendly 2001
Best Fuel Economy 2005
Best 1.4-litre to 1.8-litre 2005^[9]
Best Fuel Economy 2006
Best 1.4-litre to 1.8-litre 2006^[9]

Applications:

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 76 hp (57 kW; 77 PS) at 5000 rpm with 115 N⋅m (85 lb⋅ft) of torque at 4000 rpm. Peak thermal efficiency is about 37%.^[12]

Applications:

Toyota JPN Taxi (NTP10)

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. Output is 109.5 hp (82 kW; 111 PS) at 6000 rpm with 141 N⋅m (104 lb⋅ft) of torque at 4200 rpm. The redline is 6400 rpm.

Applications:

Toyota Vios/Belta
Toyota Yaris/Echo
Scion xA/Toyota ist
Scion xB (XP30) (1st generation)/Toyota bB (XP30) (1st generation)
Toyota Raum
Toyota Porte
Toyota Platz
Toyota Auris
Toyota Fun Cargo/Toyota Yaris Verso
Toyota Premio
Toyota Allion
Toyota Corolla (Axio/Fielder, RunX, Allex, Spacio)
Toyota Sienta
WiLL VS
Toyota Probox
Toyota Ractis
Geely CK (Produced under license)
Geely MK (Produced under license)
Great Wall Voleex C10
Great Wall Voleex C30
Mitsuoka Ryugi

1NZ-FE Turbo

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. The engine block is found in many Toyota models assembled in Asian countries. It retains the same bore and stroke. Output is 141–148 hp (105–110 kW; 143–150 PS) at 6000 rpm with 196–200 N⋅m (145–148 lb⋅ft) of torque at 4200-4800 rpm. The redline is 6400 rpm.

Applications:

Toyota Vios Turbo (Thailand)
Toyota Vitz RS Turbo/TRD Turbo M/GRMN Turbo (Japan)
Toyota Yaris T-Sport Turbo (limited edition of 400 units) (Europe)
Toyota Corolla Axio GT (Japan)

2NZ-FE

The 2NZ-FE is a 1.3 L (1,299 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 kW (84 hp; 86 PS) at 6000 rpm with 121 N⋅m (89 lb⋅ft) 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.^[13]

Applications: