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Type of engine made by Toyota From Wikipedia, the free encyclopedia
The Toyota UR engine family is a 32-valve dual overhead 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 D-4S direct injection for the 2007 Lexus LS. The series launched with a die-cast aluminum engine block, aluminum cylinder 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.
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| Toyota UR engine | |
|---|---|
1UR-FSE engine in a Lexus GS460 | |
| Overview | |
| Manufacturer | Toyota Motor Corporation |
| Production | 2006–present |
| Layout | |
| Configuration | 90° V8 |
| Displacement | 4.6 L (4,608 cc) 5.0 L (4,969 cc) 5.7 L (5,663 cc) |
| Cylinder bore | 94 mm (3.7 in) |
| Piston stroke | 83 mm (3.27 in) 89.5 mm (3.52 in) 102 mm (4.02 in) |
| Cylinder block material | Die-cast aluminum |
| Cylinder head material | Aluminum |
| Valvetrain | DOHC 4 valves x cyl. w/VVT-i |
| Compression ratio | 10.2:1, 11.8:1, 12.3:1 |
| RPM range | |
| Max. engine speed | 7300 (2UR-FE), 6000 (3UR-FE) |
| Combustion | |
| Supercharger | Eaton Twin Vortices roots-type TRD kit (on some versions) |
| Fuel system | D-4S direct injection |
| Fuel type | Gasoline E85 Ethanol (only on 3UR-FBE) |
| Cooling system | Water cooled |
| Output | |
| Power output | 304–472 hp (227–352 kW; 308–479 PS) |
| Torque output | 44.8–55.4 kg⋅m (439–543 N⋅m; 324–401 lb⋅ft) |
| Dimensions | |
| Dry weight | 222 kg (489 lb) |
| Chronology | |
| Predecessor | Toyota UZ engine |
| Successor | Toyota V35A engine (V6, for 1UR & 3UR series) |
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 D-4S 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. The maximum engine speed is 6,800 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:
The 1UR-FE is based on the 1UR-FSE but lacks the D-4S 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 322 hp (240 kW; 326 PS) at 6,900 rpm and 46.9 kg⋅m (460 N⋅m; 339 lb⋅ft) at 4,400 rpm in the Lexus GS and LS. For the Toyota Land Cruiser and Lexus GX the engine produces 304 hp (227 kW; 308 PS) at 5,900 rpm and 44.8 kg⋅m (439 N⋅m; 324 lb⋅ft) at 3,800 rpm.
Applications:
The 2UR-GSE is a 5.0 L; 303.2 cu in (4,969 cc) naturally aspirated V8 engine fitted to the IS F, RC F, GS F, LC 500, and IS 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 D-4S 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 6,800 rpm. The South Africa-based Gazoo Racing SA Toyota Hilux Dakar truck also utilizes the engine. The Lexus RCF GT3 utilises a re-stroked version of this engine which displaces 5.4 litres and makes 373 kW (500 bhp; 507 PS).[3]
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.[4] In the RC F and GS F, the compression ratio was increased to 12.3:1, the rev limit raised to 7,300 rpm 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 4,800-5,600 rpm. The engine received a further increase in power to 351 kW (471 bhp; 477 PS) @ 7,100 rpm and 55.1 kg⋅m (399 lb⋅ft; 540 N⋅m) of torque at 4,800 rpm in the LC and 354 kW (475 bhp; 481 PS) @ 7,100 rpm and 54.6 kg⋅m (395 lb⋅ft; 535 N⋅m) of torque at 4,800 rpm in the 2019 RC F.[5][6] Although since 2018, the RC F received a power decrease to 341 kW (457 bhp; 464 PS) in European markets.
From its introduction, the 2UR-GSE was exclusively available with an 8-speed automatic transmission, based off the Lexus LS460’s transmission. The Lexus LC500 is an exception, as that vehicle uses a 10-speed automatic. No manual transmission option has been offered from Toyota or Lexus from the factory with this engine.
Applications:
The 2UR-FSE is a 5.0 L (4,969 cc) engine which previously powered the Lexus LS 600h and the third-generation Toyota Century. It has D-4S 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.[7]
Applications:
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