TheToyota LR engine is aV10gasoline engine built byToyota andYamaha.[1]
| Toyota LR engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Toyota/Yamaha |
| Production | 2009–2012 |
| Layout | |
| Configuration | 72°V10 |
| Displacement | 4.8 L (4,805 cc) |
| Cylinder bore | 88 mm (3.5 in) |
| Piston stroke | 79 mm (3.11 in) |
| Cylinder head material | Aluminum |
| Valvetrain | DOHC, withVVT |
| Compression ratio | 12.0:1 |
| Combustion | |
| Fuel system | Multi-point fuel injection |
| Fuel type | Gasoline |
| Cooling system | Water cooled |
| Output | |
| Power output | 412 kW (553 hp; 560 PS) at 8.700 rpm |
| Torque output | 480 N⋅m (354 lb⋅ft) at 6.800 rpm |
1LR-GUE
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Announced in theLexus LFAsports car, the1LR-GUE is a 4,805 cc (4.8 L; 293.2 cu in)DOHC4 valves per cylinderV10 engine, made from aluminum alloy, magnesium alloy and titanium alloy and is smaller than mostV8s.[2]
The oil and water pumps are located at the rear of the engine and the lubrication system uses adry sump. Titanium is used for the valves and the rocker arms have a diamond-like coating. Eachcylinder has an independent, electronically controlledthrottle body.
Yamaha was contracted to co-develop the 1LR-GUE.[3] The exhaust system was co-developed with Yamaha's music division. The engineers described the sound of the engine as "the roar of an Angel".[4]
Maximumpower output is 560 PS (552 bhp; 412 kW) at 8,700 rpm. Maximumtorque is 480 N⋅m (354 ft⋅lb) at 6,800 rpm. The engineredlines at 9000 rpm and has a fuel cut-off at 9500 rpm, with 90% of its peak torque available from 3,700 rpm to 9,000 rpm. An LCD tachometer was fitted to the LFA as an analog fixture allegedly was not responsive enough to the engine's ability to change speed. TheLexus LFA broke the world record in 2012, for the fastest production engine revving from idle to redline in 0.6 seconds. It features a single circular dial with a central tachometer with an LCD needle. When engine speed exceeds 9000 rpm, the display area turns red to alert the driver to up-shift.[5]
- Bore ×stroke: 88 mm (3.46 in) × 79.0 mm (3.11 in)
- Compression ratio: 12.0:1
- V angle: 72 degrees
- Exhaust emissions certification: Euro 5
Applications:
See also
editReferences
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- ^"2parts.olathetoyota.com".parts.olathetoyota.com. 2018-10-03. Retrieved2022-10-03.
- ^"Lexus Debuts LFA" (Press release). Japan: Toyota. 2009-10-21. Archived fromthe original on 2010-02-11. Retrieved2009-10-22.
- ^"Lexus LFA – Ultra-exclusive supercar announced for production" (Press release). UK: Lexus. 2009-10-21. Archived fromthe original on 2009-10-24.
- ^"2011 Lexus LFA (1LR-GUE)".Yamaha Motor Co., Ltd. Retrieved2023-05-15.
- ^"2009 Lexus LFA".ultimatecarpage.com. 2009-10-21. Retrieved2018-06-26.