Toyota UR engine

Toyota UR engine
Overview
Manufacturer Toyota Motor Corporation
Production 2006–present
Layout
Configuration DOHC 90° V8
Chronology
Predecessor Toyota UZ engine

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.

1UR

1UR-FSE

1UR-FSE

The 1UR-FSE V8 engine, introduced with the Lexus LS 460 & LS 460 L luxury sedans in 2006 has a 4.6 litre (4608cc) displacement, which it gets from a 94 mm bore and 83 mm stroke. The engine includes D4-S direct injection and dual VVT-iE producing 385 hp (287 kW) 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-FE

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) 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) at 5,500 rpm and 44.8 kg⋅m (439 N⋅m; 324 lb⋅ft) at 3,400 rpm.

Applications:

2UR

2UR-GSE

2UR-GSE

The 2UR-GSE is a 4,969 cc (5.0 L; 303.2 cu in) 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 is 94 mm (3.70 in) and stroke is 89.5 mm (3.52 in).

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 371 lb⋅ft (503 N⋅m; 51 kg⋅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 389 lb⋅ft (527 N⋅m; 54 kg⋅m) at 4800-5600 rpm of torque.[4]

Applications:

2UR-FSE

2UR-FSE

The 2UR-FSE is a 5.0 litre (4969 cc) engine and powers the Lexus LS600h. 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) 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 kilowatts (439 hp) 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:

3UR

3UR-FE

The 3UR-FE is a 5.7-litre (5663 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 of 94 mm and stroke of 102 mm, it produces 381 hp (283 kW) at 5,600 rpm and 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.

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) and 550 lb⋅ft (750 N⋅m) of torque. Offered by Toyota's TRD, the supercharger kit could be installed by dealers and covered under warranty.

Applications:

3UR-FBE

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

Applications:

References

  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

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

See also

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