Showing posts with label Lexus. Show all posts
Showing posts with label Lexus. Show all posts

Friday, March 4, 2011

2012 LEXUS LFA Nurburgring Package

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To celebrate the Lexus LFA's hat-trick of class wins at the Nürburgring 24 Hours race, Lexus has created the Nürburgring Package, an array of aerodynamic features, suspension adjustments and revisions to the 4.8-litre V10 engine that give the supercar a more track-focused profile. Shown in public for the first time at the 2011 Geneva Motor Show, the performance option is available on just 50 of the 500 cars that will be built. These versions will be crafted during 2012, the second full year of Lexus LFA production.
 
To sharpen the car's circuit driving performance even further by increasing downforce at high speed, the Nürburgring Package introduces modifications and additions to several key carbon fibre reinforced plastic (CFRP) components. These include a larger front spoiler, fin-type side spoilers, a canard fin and a fixed rear wing.

To ensure the Lexus LFA maintains its 3.7-second acceleration time from nought to 62mph, in spite of the increased drag, the V10 engine has been revised to increase maximum power by 10bhp to 562bhp. Shift times in the six-speed sequential transmission are just 0.15 seconds.

In terms of handling modifications, the package features suspension tuning and a 10mm reduction in the ride height. Exclusive mesh-type wheels are introduced, fitted with dedicated high-grip tyres.

Exterior colour choices are restricted to matte black, black, white or orange, with interiors finished in black and red, black and purple and all-black. Cars delivered in Europe will feature a carbon fibre centre console and door trims, with carbon fibre sports seats finished in Alcantara.

Customers who specify the package will also be offered one-to-one driving tuition from a Nürburgring chief instructor and a year's pass to enjoy their car on the famous Nordschleife circuit.

CFRP parts manufacturing

Lexus LFA production began in December 2010 with just one hand-crafted car completed per day. A team of 175 people are involved in CFRP parts manufacturing, vehicle assembly and painting.

CFRP is exceptionally strong, rigid and lightweight, and accounts for about 65 per cent of the Lexus LFA's body structure weight. This amounts to a saving of about 100kg, compared an equivalent all-aluminium body.

Lexus is producing and assembling the CFRP components in-house, with a view to future development of the technology. It is a time-consuming process, compared to working with steel or aluminium, but the LFA project provides a valuable test bed for new, automated processes which will be used in the manufacture of future Lexus and Toyota models.

Different manufacturing technologies are used according the shape, role and required properties of each component.

* Pre-preg: this is an industry-standard composite sheet material made of carbon fibre, pre-impregnated with epoxy resin. It is used for the Lexus LFA's main structural elements, such as the dash, side and cross-members and panels.
* Resin Transfer Moulding (RTM): this is dry sheet fabrication, with epoxy resin injected into the mould. It is mainly employed in the Lexus LFA's secondary main frames, such as the crash boxes, roof side rails and vehicle floor.
* Carbon fibre - Sheet Moulding Compound (C-SMC): this is used for fabricating the upper body components and frames that have complex geometries.

Adhesive bonding

The Lexus LFA assembly line moves through five consecutive processes, each of which has been digitally validated. For the first four - sub-assembly, underbody, small aluminium parts and main body - adhesive bonding is used. Final assembly of the aluminium parts is by mechanical fastening.

This is the first time Lexus has used adhesive bonding for main body assembly, a process that has required new quality control measures to be implemented to ensure each of the five stages involved in the bonding meets the required criteria.
 

Sunday, November 14, 2010

LEXUS CT 200h (2011)

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The new Lexus CT 200h is the first full hybrid vehicle to be launched in the premium compact segment. Entering production in late 2010 and set for sale worldwide, the full hybrid model will provide a new gateway to the Lexus range and attract new, younger customers to the brand.

The Lexus CT 200h was designed and developed with the European market in mind. Lexus's first five-door compact car, its size, packaging, full hybrid technology and low emissions fully address the requirements of discerning, environment-conscious customers in a key market sector. At the same time, it does not compromise the quality, refinement and driving pleasure that are the hallmarks of every Lexus.Exterior and interior design
The production-ready Lexus CT 200h retains strong visual links to the LF-Ch Concept unveiled at the 2009 Frankfurt motor show. Its styling marks a powerful evolution of Lexus's L-finesse design philosophy with a distinctive, sharp-edged look that sets it apart from its premium compact rivals.

The exterior is styled for maximum aerodynamic efficiency and minimum wind noise. The strong front grille, directly referencing the LF-Ch concept sits over a full-width bumper and air dam. The headlamp units, positioned higher than the grille (a signature feature of L-finesse design), incorporate LED daytime running lights.

In profile, the steeply raked windscreen, long, flowing roofline and Lexus slingshot window graphic combine to create an elegant and distinctive silhouette. The front and rear corners have been pulled in tight and the wings are styled to improve airflow down the sides of the vehicle.

At the rear, the trailing edge of the roof overhangs a wide, wraparound rear window to create a seamless, integrated spoiler. A pronounced step in the tailgate section flows from the shoulders of the rear wheelarches and is anchored by a tail lamp design that displays the L-shaped motif that Lexus first introduced on the current LS model.

The interior combines superior ergonomics with extensive use of metallic finishes and dark, soft-touch surfaces.

Lexus has retained the asymmetrical dashboard design seen in the LF-Ch show car. Based on the Future Lexus Interior concept, the dashboard is split into an upper Display Zone, with an eight-inch LCD multi-display screen; and a lower Operation Zone, with the shift lever and other controls such as Lexus's Remote Touch multi-function controller.

In keeping with the car's performance, the driving position is set low, with a highly supportive driver's seat. The instrument binnacle houses large, twin dials; in SPORT mode, the hybrid indicator in the binnacle functions as a tachometer and the ambient lighting turns from blue to red. The two-mode switch ring and a spotlight in the centre cluster also light up in red, changing the whole atmosphere of the cabin.

In spite of its compact, efficient design, the Lexus CT 200h offers a roomy interior. The 2,600mm wheelbase allows for front and rear passenger accommodation that is among the most spacious in the segment. Luggage capacity is 345 litres, increasing to 700 litres with the rear seats lowered.

Lexus Hybrid Drive
The Lexus Hybrid Drive system in the Lexus CT 200h combines a 1.8-litre VVT-i petrol engine with a powerful electric motor. Drivers have the choice of four selectable drive modes: ECO and NORMAL place the emphasis on efficiency and comfort, while SPORT focuses on dynamic performance.

Unlike mild hybrid systems used by other manufacturers, the Lexus CT 200h also has an EV (electric vehicle) mode that allows for ultra-quiet running on the electric motor alone, resulting in zero fuel consumption and CO2, NOx and particulate emissions. The car is capable of running in EV mode for up to 1.2 miles at speeds up to 28mph.

Chassis and suspension
The Lexus CT 200h is built on a new platform with a dedicated double wishbone and trailing arm rear suspension system. It has been developed specifically to combine the ride comfort expected of a Lexus with superior driving involvement and handling agility.

Several elements in the MacPherson strut design have been exclusively developed for the mode, including the coil springs and shock absorbers, and a new front anti-roll bar has been designed to deliver improved roll rigidity.

The double wishbone rear suspension is exclusive to the Lexus CT 200h and incorporates a lightweight trailing arm. The springs and shocks are positioned separately to minimise intrusion into the loadspace floor.

Lexus CT 200h Technical Specifications

= ENGINE
. o Number of cylinders: 4, in-line
. o Displacement: 1,800 cc
= MOTOR GENERATOR
. o Motor type: Permanent magnet synchronous motor
= HIGH-VOLTAGE BATTERY
. o Battery type: Nickel-metal hydride (NiMh)
= TRANSMISSION
. o Type: Front-wheel drive
. o Gearbox type: Electrically controlled continuously variable transmission (E-CVT)
= SUSPENSION
o Front: MacPherson strut with anti-roll bar, coil springs and shock absorbers
o Rear: Double wishbone with coil springs and shock absorbers
= STEERING
. o Type: Electric power-assisted rack and pinion
= EXTERIOR DIMENSIONS
. o Overall length: 4,320 mm
. o Overall width: 1,765 mm
. o Overall height: 1,430 mm
. o Wheelbase: 2,600 mm
. o Front track: 1,525 mm
. o Rear track: 1,525 mm
. o Front overhang: 915 mm
. o Rear overhang: 805 mm
= WHEELS
o Type/size: Alloy, 17"
= LUGGAGE CAPACITY
. o Rear seat up: 345 l
. o Rear seat down: 700 l

LEXUS LF-A Roadster Concept (2008)

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The engineers and designers at Lexus continue to use their groundbreaking LF-A premium sports car concept as a medium for expressing their ideas about what a high-performance sporting vehicle not only can be, but should be. In this latest expression of the LF-A, they have removed the car's top to create a high-performance roadster.

The LF-A Roadster is based on the sturdy yet lightweight carbon-fiber and aluminum body used for the LF-A coupe, which helps maintain the structure's strength and rigidity even without a top.

Like its coupe counterpart, the LF-A Roadster is powered by a high-revving V10 engine that approaches 5.0 liters in displacement. The V10, capable of more than 500 horsepower and test-track speeds greater than 200 mph, is mounted in front of the passenger compartment but behind the front-axle centerline in what the LF-A's engineers refer to as a "front-mid" configuration.

The engine is connected via a torque tube and propeller shaft to a transaxle that is controlled by paddle shifters. The torque tube is a structural member that adds rigidity to the drivetrain and chassis while also reducing vibration.

Styling is rooted in the Lexus L-Finesse design philosophy, conferring the LF-A Roadster's front end with a compact, low-profile, aerodynamic shape. Like its coupe counterpart, the LF-A Roadster stands just 48 inches tall, but the Roadster configuration adds a speed adaptive rear wing.

The rear is marked by a pair of wrap-around, arrowhead-shaped taillights that bracket a pair of large grilles. These grilles vent the heated air from the car's two rear-mounted radiators into the LF-A Roadster's aerodynamic wake. The radiators are fed cool air by two large intake ducts mounted just above the rear wheel wells. This aft radiator positioning not only allowed the designers to keep the car's front profile low and tight but also aided the LF-A's chassis engineers in their search for optimal weight distribution.
Helping to provide balance and scale to the design, which features an overall length of 175.6 inches and a wheelbase of 102.6 inches, are high-performance tires on turbine-styled alloy wheels. The front tires are 265/35R20s, while the rears are 305/30R20s. Like the LF-A coupe, the brakes consist of 14.2-inch cross-drilled, vented discs up front, and 13.6-inch cross-drilled, vented discs at the rear. The front brake calipers are six-piston units and the rear calipers use four pistons each.
An "F" logo, located on each front fender of the Roadster, indicates the vehicle's status as a part of the new "F" marque. The name is derived from the original "F" designation for the first Lexus LS prototype. That vehicle was internally coded "Circle-F," with the "F" standing for "flagship." The Circle-F designation further evolved into the code name Flagship One, or F1, and the first F1 concept developed into Lexus' first vehicle, the LS. Since then, the "F" code has come to signify a special vehicle program within Lexus that falls outside the normal engineering and development process. In addition, Fuji Speedway is the IS F's home circuit, and the shape of the F-logo was inspired by many of the track's turns. The all-new Lexus IS F sport sedan is the first production vehicle to carry the F marque.
Helping to provide balance and scale to the design, which features an overall length of 175.6 inches and a wheelbase of 102.6 inches, are high-performance tires on turbine-styled alloy wheels. The front tires are 265/35R20s, while the rears are 305/30R20s. Like the LF-A coupe, the brakes consist of 14.2-inch cross-drilled, vented discs up front, and 13.6-inch cross-drilled, vented discs at the rear. The front brake calipers are six-piston units and the rear calipers use four pistons each.

An "F" logo, located on each front fender of the Roadster, indicates the vehicle's status as a part of the new "F" marque. The name is derived from the original "F" designation for the first Lexus LS prototype. That vehicle was internally coded "Circle-F," with the "F" standing for "flagship." The Circle-F designation further evolved into the code name Flagship One, or F1, and the first F1 concept developed into Lexus' first vehicle, the LS. Since then, the "F" code has come to signify a special vehicle program within Lexus that falls outside the normal engineering and development process. In addition, Fuji Speedway is the IS F's home circuit, and the shape of the F-logo was inspired by many of the track's turns. The all-new Lexus IS F sport sedan is the first production vehicle to carry the F marque.

Lexus LF-A Roadster Concept Preliminary Specifications

= Body Type: Two seat roadster
= Powertrain
. - Type: Front-mid-engine, rear-mid-transaxle
. - Engine: V10 (under 5.0-liters)
. - Transmission: SMT (sequential manual transmission)
. - Horsepower: More than 500
. - Top Speed: More than 200 mph
= Tire Size
. - Front: 265/35R20
. - Rear: 305/30R20
= Dimensions (inches)
. - Overall Length: 175.6
. - Overall Width: 74.6
. - Overall Height: 48.0
. - Wheelbase: 102.6