The Toyota LR engine is a

V10 A V10 engine is a ten-cylinder piston engine where two banks of five cylinders are arranged in a V configuration around a common crankshaft. V10 engines are much less common than V8 and V12 engines. Several V10 diesel engines have been prod ...

gasoline engine A petrol engine (gasoline engine in American and Canadian English) is an internal combustion engine designed to run on petrol (gasoline). Petrol engines can often be adapted to also run on fuels such as Autogas, liquefied petroleum gas and Common ...

built by

Toyota is a Japanese Multinational corporation, multinational Automotive industry, automotive manufacturer headquartered in Toyota City, Aichi, Japan. It was founded by Kiichiro Toyoda and incorporated on August 28, 1937. Toyota is the List of manuf ...

and

Yamaha Yamaha may refer to: People * Torakusu Yamaha, a Japanese businessman and founder of the Yamaha Corporation Companies * Yamaha Corporation, a Japanese musical instrument and audio equipment manufacturer ** Yamaha Music Foundation, an organi ...

1LR-GUE

Toyota-Yamaha Lexus LF-A Production Prototype engine 2009 Tokyo Motor Show

Announced in the

Lexus LFA The is a two-door sports car produced between 2010 and 2012 by the Japanese carmaker Toyota under its luxury marque, Lexus. Lexus built 500 units over its production span of two years. The development of the LFA, codenamed TXS, began in early ...

sports car A sports car is a type of automobile that is designed with an emphasis on dynamic performance, such as Automobile handling, handling, acceleration, top speed, the thrill of driving, and Auto racing, racing capability. Sports cars originated in ...

, the 1LR-GUE is a

DOHC An overhead camshaft (OHC) engine is a piston engine in which the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combus ...

4 valves per cylinder

V10 engine A V10 engine is a ten- cylinder piston engine where two banks of five cylinders are arranged in a V configuration around a common crankshaft. V10 engines are much less common than V8 and V12 engines. Several V10 diesel engines have been pro ...

, made from aluminum alloy, magnesium alloy and titanium alloy and is smaller than most V8s. The oil and water pumps are located at the rear of the engine and the lubrication system uses a

dry sump A dry sump system is a method to manage the lubricating motor oil in Four-stroke engine, four-stroke and large Two-stroke engine, two-stroke Reciprocating engine, reciprocating internal combustion engines. The dry sump system uses two or more o ...

. Titanium is used for the valves and the rocker arms have a diamond-like coating. Each

cylinder A cylinder () has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. In elementary geometry, it is considered a prism with a circle as its base. A cylinder may also be defined as an infinite ...

has an independent, electronically controlled

throttle body A throttle is a mechanism by which fluid flow is managed by construction or obstruction. An engine's power can be increased or decreased by the restriction of inlet gases (by the use of a throttle), but usually decreased. The term ''throttle'' ha ...

. Yamaha was contracted to co-develop the 1LR-GUE. 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". Maximum

power Power may refer to: Common meanings * Power (physics), meaning "rate of doing work" ** Engine power, the power put out by an engine ** Electric power, a type of energy * Power (social and political), the ability to influence people or events Math ...

output is at 8,700 rpm. Maximum

torque In physics and mechanics, torque is the rotational analogue of linear force. It is also referred to as the moment of force (also abbreviated to moment). The symbol for torque is typically \boldsymbol\tau, the lowercase Greek letter ''tau''. Wh ...

is at 6,800 rpm. The engine

redline The redline is the maximum engine speed at which an internal combustion engine or traction motor and its components are designed to operate without causing damage to the components themselves or other parts of the engine. The redline of an eng ...

s 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. The

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. * Bore ×

stroke Stroke is a medical condition in which poor cerebral circulation, blood flow to a part of the brain causes cell death. There are two main types of stroke: brain ischemia, ischemic, due to lack of blood flow, and intracranial hemorrhage, hemor ...

: × *

Compression ratio The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine. A fundamental specification for such engines, it can be measured in two different ways. Th ...

: 12.0:1 *V angle: 72 degrees *Exhaust emissions certification: Euro 5 Applications: *

References

{{DEFAULTSORT:Toyota Lr Engine LR Gasoline engines by model V10 engines Yamaha engines

1LR-GUE

See also

References