Wikipedia

Toyota UZ engine

The Toyota UZ engine family is a gasoline[1] fueled 32-valve quad-camshaft V8 piston engine series used in Toyota's luxury offerings and sport utility vehicles.[2] Three variants have been produced: the 1UZ-FE, 2UZ-FE, and 3UZ-FE. Production spanned 24 years, from 1989 to mid 2013, ending with the final production of the 3UZ-FE-powered Toyota Crown Majesta I-FOUR.[3] Toyota's UZ engine family was replaced by the UR engine family.

Toyota UZ Engine
3UZ-FE engine
Overview
ManufacturerToyota Motor Corporation
Production1989–2013
Layout
Configuration90° V8
ValvetrainDOHC 4 valves x cyl. w/VVT-i
Combustion
Fuel systemMulti-point fuel injection
Fuel typeGasoline
Cooling systemWater cooled
Output
Power output191–373 kW (256–500 hp; 260–507 PS)
Torque output353–441 N⋅m (260–325 lb⋅ft)
Chronology
PredecessorToyota V engine
SuccessorToyota UR engine

1UZ-FE

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The 4.0 L (3,969 cc; 242.2 cu in) all-alloy 1UZ-FE debuted in 1989 in the first generation Lexus LS 400/Toyota Celsior and the engine was progressively released across a number of other models in the Toyota/Lexus range. The engine is oversquare by design, with a bore and stroke size of 87.5 mm × 82.5 mm (3.44 in × 3.25 in).[2] It has proven to be a strong, reliable and smooth powerplant with features such as 6-bolt main bearings and belt-driven quad-camshafts. The water pump is also driven by the timing/cam belt. The connecting rods and crankshaft are constructed of steel. The pistons are hypereutectic.

 
1UZ-FE (rear view)

The FV2400-2TC derivative is one of the few road-going engines that is FAA approved for use in an airplane.

Its resemblance to a race engine platform (6 bolt cross mains and over square configuration) was confirmed in 2007 by David Currier (in an interview with v-eight.com), vice president of TRD USA, stating that the 1UZ platform was based on CART/IRL engine design. It was planned to be used on GT500 vehicles, however its subsequent use in the Daytona Prototype use had not been planned.[citation needed]

In its original, Japanese domestic market trim with 10.0:1 compression, power output is 191 kW JIS (256 hp; 260 PS), torque of 353 N⋅m (260 lb⋅ft).[2] The European-market version produces a claimed 245 PS DIN (180 kW; 242 hp).

The engine was slightly revised in 1995 with lighter connecting rods and pistons and an increased compression ratio to 10.4:1 resulting in peak power of 195 kW (261 hp; 265 PS) at 5,400 rpm and torque of 365 N⋅m (269 lb⋅ft) at 4,400 rpm.

In 1997, Toyota's VVT-i variable valve timing technology was introduced along with a further compression ratio increase to 10.5:1,[2] bumping power and torque to 216 kW (290 hp; 294 PS) at 5,900 rpm and 407 N⋅m (300 lb⋅ft) at 4,100 rpm. For the GS 400, output was rated at 224 kW (300 hp; 305 PS) at 6,000 rpm and 420 N⋅m (310 lbf⋅ft) at 4,000 rpm.

The 1UZ-FE was voted to the Ward's 10 Best Engines list for 1998 through 2000.[4][5]

Applications (calendar years):

2UZ-FE

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2UZ-FE

The 2UZ-FE was a 4.7 L; 284.6 cu in (4,663 cc) version built in Tahara, Aichi, Japan and at Toyota Motor Manufacturing Alabama. Unlike its other UZ counterparts, this version uses a cast iron block to increase durability, as it was designed for low-revving, high-torque pickup and SUV applications. Its bore and stroke is 94 mm × 84 mm (3.70 in × 3.31 in).[2] Output varies by implementation, but one VVT-i variant produces 202 kW (271 hp; 275 PS) at 4800 rpm with 427 N⋅m (315 lb⋅ft) of torque at 3400 rpm. JDM versions produce 173 kW (232 hp; 235 PS) at 4800 rpm and 422 N⋅m (311 lb⋅ft) at 3600 rpm, while Australian models produce 170 kW (228 hp; 231 PS) at 4800 rpm and 410 N⋅m (302 lbf⋅ft) at 3600 rpm.[2]

Like the 1UZ-FE, it has aluminum DOHC cylinder heads, multi-port fuel injection, 4 valves per cylinder with bucket tappets, one-piece cast camshafts, and a cast aluminum intake manifold. For 2010, it was replaced by the 1UR-FE or 3UR-FE, depending on the country.

Applications (calendar years):[7]

Toyota Racing Development offered a bolt-on supercharger kit for the 2000–2003 Tundra/Sequoia and the 1998–2003 LX 470.

Another 2UZ-FE variation adds VVT-i, electronic throttle control, and a plastic intake manifold.

Applications (calendar years):[7]

3UZ-FE

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3UZ-FE

The 3UZ-FE is a 4.3 L; 261.9 cu in (4,292 cc) version built in Japan. Bore and stroke is 91 mm × 82.5 mm (3.58 in × 3.25 in) .[2] Output is 216 to 224 kW (290 to 300 hp; 294 to 305 PS) at 5600 rpm with 441 N⋅m (325 lb⋅ft) of torque at 3400 rpm. The engine block and heads are aluminum. It has a DOHC valvetrain with 4 valves per cylinder and VVT-i. It uses SEFI fuel injection. In 2003, the engine was paired with a six-speed automatic transmission, resulting in improved fuel economy over the previous five-speed automatic.[2] The maximum engine speed is 6,500 RPM.

A 4.5L version replaced the 3S-GTE as the engine used in Toyota's 500 hp (373 kW) Super GT race cars up to 2009[citation needed] and a 5.0L version was used in the Grand American Road Racing (Grand Am) Series.[8]

Applications (calendar years):[2]

Derivatives

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FV2400-2TC

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In 1997, the US Federal Aviation Administration granted production certification for the FV2400-2TC, a twin-turbocharged airplane powerplant based on the 1UZ-FE.[9] The 360 hp (268 kW; 365 PS) FV2400 was developed in partnership with Hamilton Standard, which provided the digital engine-control system.[9] The goal was to produce a four-seat propeller aircraft.[10]

VT300i

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In 1998, a marine derivative of the UZ powerplant was produced for boating applications. The 4.0 L VT300i engine, producing 224 kW; 304 PS (300 hp) at 6000 rpm and 420 N⋅m (310 lb⋅ft) at 4200 rpm, used the same block as the UZ engine on the Lexus SC 400, GS 400, and LS 400.

Applications (calendar years):

  • 1998 Toyota Epic S21[11]
  • 1999–2001 Toyota Epic S22/SX22[12]
  • 1999–2001 Toyota Epic X22[13][14]

References

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  1. ^ "Toyota Gasoline 2UZ-FE Engine". WikiMotors. Retrieved 2016-07-27.
  2. ^ a b c d e f g h i "The Toyota UZ-series Engine Guide". AutoSpeed. Archived from the original on 2009-08-02. Retrieved 2009-08-11.
  3. ^ "TOYOTA CROWN MAJESTA catalog - reviews, pics, specs and prices | Goo-net Exchange". www.goo-net-exchange.com. Retrieved 2016-09-06.
  4. ^ Visjic, Bill (1998-01-01). "Revved up! The 10 best engines of 1998". Ward's Auto World. Archived from the original on 2007-02-11. Retrieved 2007-05-15.
  5. ^ Visnic, Bill (2000-02-01). "10 Best Engines 2000". Ward's Auto. Retrieved 2017-09-03.
  6. ^ a b c Visnic, Bill (1998-01-01). "Toyota/Lexus 4L DOHC V-8". Ward's Auto World. US. Archived from the original on 2004-11-05.
  7. ^ a b "Used Car Information - MSN Autos". Microsoft. Archived from the original on 2008-12-17. Retrieved 2009-01-02.
  8. ^ "Toyota Outlines Motor Sports Activities for 2009" (Press release). Japan: Toyota. 2009-03-16. Archived from the original on 2009-07-06.
  9. ^ a b "Toyota is cleared to produce piston aero-engine". 1997-01-08. Retrieved 2017-09-20 – via Flight Global.
  10. ^ "Look, Up in the Air, It May Be a Toyota". The New York Times. 1996-12-20. Retrieved 2017-09-20.
  11. ^ Plueddeman, Clarles (July 1998). "Rising Fun - Toyota 21: Where does Godzilla go skiing..." Boating. US.
  12. ^ "Toyota Epic S22". Waterski Magazine. US. 2001-06-15. Archived from the original on 2011-07-19. Retrieved 2017-09-03.
  13. ^ "Toyota Epic X22". Waterski Magazine. US. 2001-06-15. Archived from the original on 2012-03-23. Retrieved 2017-09-03.
  14. ^ "Toyota Launches Into Wakeboarding with Epic X22". WakeWorld. US. 1999-01-19. Archived from the original on 2001-06-27. Retrieved 2007-05-15.

See also

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Wikimedia Commons has media related to Toyota UZ engines.
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