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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 basic versions 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
Toyota 3UZ-FE engine 001.JPG
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

Contents

1UZ-FEEdit

The 4.0 L; 242.1 cu in (3,968 cc) 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 proved 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 cam belt. The connecting rods and crankshaft are constructed of steel. The pistons are hypereutectic.

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.

In its standard, original trim with 10.0:1 compression, power output is 191 kW (256 hp; 260 PS), torque of 353 N⋅m (260 lb⋅ft).[2]

 
1UZ-FE

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 GS400, 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-FEEdit

 
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, MFI 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 and electronic throttle control.

Applications (calendar years):[7]

3UZ-FEEdit

 
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. It has an aluminum engine block and aluminum DOHC cylinder heads. It uses SEFI fuel injection, has 4 valves per cylinder with VVT-i. In 2003, the engine was linked to a six-speed automatic in applications with improved fuel efficiency.[2]

A 4.4L 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]

DerivativesEdit

FV2400-2TCEdit

In 1997, the US Federal Aviation Administration granted production certification for the FV2400-2TC, a twin-turbocharged airplane powerplant based on the UZ series Lexus engine.[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]

VT300iEdit

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]

ReferencesEdit

  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. 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. 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 skiiing..." 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 alsoEdit