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The Toyota UR engine family is a 32-valve quad-camshaft V8 piston engine series which was first introduced in 2006 as the UZ series it replaced began phasing out. Production started with the 1UR-FSE engine with D4-S direct injection for the 2007 Lexus LS. The series launched with a die-cast aluminum block, aluminum heads, and magnesium cylinder head covers.[1] All UR engines feature variable valve timing for both intake and exhaust cams or Dual VVT-i. Timing chains are used to drive the camshafts. The UR engine has been produced in 4.6, 5.0, and 5.7-liter displacement versions.

Toyota UR engine
Toyota 1UR-FSE Engine.JPG
1UR-FSE engine in a Lexus GS460
Overview
ManufacturerToyota Motor Corporation
Production2006–present
Layout
Configuration90° V8
Displacement4.6 L (4,608 cc)
5.0 L (4,969 cc)
5.7 L (5,663 cc)
Cylinder bore94 mm (3.7 in)
Piston stroke83 mm (3.27 in)
89.5 mm (3.52 in)
102 mm (4.02 in)
Block materialDie-cast aluminum
Head materialAluminum
ValvetrainDOHC 4 valves x cyl. w/VVT-i
Compression ratio11.8:1, 12.3:1
RPM range
Redline7300
Combustion
SuperchargerEaton's Twin Vortices roots-type TRD kit (on some versions)
Fuel systemD4-S direct injection
Fuel typeGasoline
E85 Ethanol (only on 3UR-FE)
Cooling systemWater cooled
Output
Power output304–384 hp (227–286 kW; 308–389 PS)
Torque output44.8–55.4 kg⋅m (439–543 N⋅m; 324–401 lb⋅ft)
Dimensions
Dry weight222 kg (489 lb)
Chronology
PredecessorToyota UZ engine

Contents

1UREdit

1UR-FSEEdit

 
1UR-FSE

The 1UR-FSE V8 engine, introduced with the Lexus LS 460 & LS 460 L luxury sedans in 2006 has a 4.6 L (4,608 cc) displacement, which it gets from a bore and stroke of 94 mm × 83 mm (3.70 in × 3.27 in). The engine includes D4-S direct injection and dual VVT-iE producing 385 hp (287 kW; 390 PS) at 6,400 rpm and 51 kg⋅m (500 N⋅m; 369 lb⋅ft) at 4,100 rpm.

1UR-FSE undergoes X-ray inspection and a CT (computed tomography) scan to ensure minimal deformation after the die-casting process. Camshafts are hollow to minimize weight.[2]

Applications:

1UR-FEEdit

The 1UR-FE is based on the 1UR-FSE but lacks the D4-S direct injection technology. Originally used for Lexus vehicles in the Middle East, it was introduced in 2010 in other markets to replace the 2UZ-FE engine in truck and SUV applications. This engine produces 347 hp (259 kW; 352 PS) at 6,400 rpm and 46.9 kg⋅m (460 N⋅m; 339 lb⋅ft) at 4,100 rpm in the Lexus GS and LS. For the Toyota Land Cruiser the engine produces 304 hp (227 kW; 308 PS) at 5,500 rpm and 44.8 kg⋅m (439 N⋅m; 324 lb⋅ft) at 3,400 rpm.

Applications:

2UREdit

2UR-GSEEdit

 
2UR-GSE

The 2UR-GSE is a 5.0 L; 303.2 cu in (4,969 cc) naturally aspirated V8 engine fitted to the Lexus IS-F, RC-F, GS-F and LC 500. It is an all-alloy DOHC, 4 valves per cylinder with Yamaha-designed high-flow cylinder heads, titanium inlet valves, high-lift camshafts and dual-length intake. It has D4-S gasoline port and direct injection, Dual VVT-i with electric VVT-iE inlet camshaft actuation. Bore and stroke is 94 mm × 89.5 mm (3.70 in × 3.52 in). The engine has a redline of 7300 rpm.

In the IS-F the engine had an 11.8:1 compression ratio and produced 310 kW (416 bhp; 421 PS) @ 6,600 rpm and 51.3 kg⋅m (371 lb⋅ft; 503 N⋅m) @ 5,200 rpm of torque.[3] In the RC-F and GS-F the compression ratio was increased to 12.3:1 and output 348 kW (467 bhp; 473 PS) @ 7,100 rpm and 53.8 kg⋅m (389 lb⋅ft; 528 N⋅m) of torque at 4800-5600 rpm. The engine received a further increase in power to 351 kW (471 bhp; 477 PS) @ 7100 rpm and 55.1 kg⋅m (399 lb⋅ft; 540 N⋅m) of torque at 4800 rpm in the LC.[4]

Applications:

2UR-FSEEdit

 
2UR-FSE

The 2UR-FSE is a 5.0 L (4,969 cc) engine which previously powered the Lexus LS600h and the current Toyota Century. It has D4-S gasoline direct injection, Dual VVT-i, and VVT-iE on the intake cam. It has the same bore and stroke as the 2UR-GSE, but produces 394 hp (294 kW; 399 PS) at 6,400 rpm and 53 kg⋅m (520 N⋅m; 383 lb⋅ft) at 4,000 rpm. The electric motors (Lexus Hybrid Drive) in the system add extra power into the drivetrain, allowing the combination to deliver 327 kW (439 hp; 445 PS) in total.

The engine's valve covers are made from a magnesium alloy, the cylinder heads are manufactured from aluminum alloy, while like the 1UR engine block it is die-cast to save weight.[5]

Applications:

3UREdit

3UR-FEEdit

The 3UR-FE is a 5.7 litres (5,663 cc) engine designed for use in Toyota Tundra/Sequoia/Land Cruiser, and Lexus LX570 vehicles, without the D-4S gasoline direct injection but with Dual VVT-i. Bore and stroke of 94 mm × 102 mm (3.70 in × 4.02 in), it produces 381 hp (284 kW; 386 PS) at 5,600 rpm and 55.4 kg⋅m (401 lb⋅ft; 543 N⋅m) of torque at 3,600 rpm. A stainless steel exhaust manifold incorporating a 3-way catalytic converter is used. This engine is cast at Toyota's Bodine Aluminum and currently assembled at Toyota Motor Manufacturing Alabama. Over 1.3 million kilometers of durability testing have gone into the engine. E85 ethanol capability was optional for the 2009 model year.[6] The engine's service weight is 222 kg (489 lb).

For a time, Toyota offered an available bolt-on Toyota Racing Development Eaton's Twin Vortices Series roots-type supercharger kit for the Tundra and Sequoia bumps power up to 504 hp (376 kW; 511 PS) and 550 lb⋅ft (746 N⋅m) of torque. Offered by Toyota's TRD, the supercharger kit could be installed by dealers and covered under warranty.

Applications:

3UR-FBEEdit

An E85 Ethanol version of the 3UR-FE engine.

Applications:

ReferencesEdit

  1. ^ Vasilash, Gary (2006). "Lexus Comes Into Its Own". Automotive Design & Production. Archived from the original on 2007-09-26. Retrieved 2007-05-06.
  2. ^ http://www.pressroom.com.au/press_kit_detail.asp?clientID=3&navSectionID=13&categoryID=1000&kitID=222
  3. ^ "2007 Lexus IS-F". ultimatecarpage.com. Retrieved June 26, 2018.
  4. ^ "2014 Lexus RC-F". ultimatecarpage.com. Retrieved June 26, 2018.
  5. ^ Society of Automotive Engineers Archived 2011-06-05 at the Wayback Machine
  6. ^ Tundra CrewMax Reveal at 2007 North American International Auto Show[permanent dead link]

http://www.toyota.co.jp/en/tech/environment/powertrain/engine/engine2.html

See alsoEdit