Lexus IS Convertible

Sophisticated Retractable Hardtop Convertible

Convertible Aerodynamics

The Lexus IS convertible has a best-in-class 0.29 drag coefficient (Cd). This is accomplished with the help of underbody covers below the engine (with aerodynamic steps), the full floor, and fuel-tank covers, as well as s rear-floor diffuser with vertical fin and airfoil. Other areas that contribute to the low Cd include the design shape of the outer mirrors, high-mount stop lamps, and the rear tailamps. Fender fairings before the front and rear tires reduce airflow into the wheel house, improving aero characteristics and reducing air turbulence.

The Lexus IS convertible's air conditioning system automatically adjusts for the outside temperature when the top is lowered, improving interior temperature consistency and comfort. The system adjusts the air outlets, temperature and air flow exiting the outlets. The airflow volume adjusts to outside temperature and vehicle speed, while the temperature control adjusts to outside temperature, amount of sunlight and vehicle speed. The system also includes a pollen filter and variable-control compressor.

Convertible Body Rigidity
The Lexus IS convertible's body structure has excellent rigidity and strength, achieved by effective structural changes and additions to the existing IS sedan platform.
The transformation to a convertible also required reevaluation of noise, vibration and harshness (NVH) characteristics in order to meet Lexus standards. All body and chassis revisions have gone through extensive testing to ensure that the IS250C and IS350C have nearly identical NVH characteristics as the IS sedans. High-rigidity damping materials and asphalt sheets have been added to minimize vibration effects. Redesigned rear-suspension-mount bushings help reduce noise and vibration associated with the changes in body characteristics from a sedan to a convertible.


Easy Access Utility & Comfort
The new Lexus IS convertible emphasizes easy access and rear-seat comfort. In addition to front doors that are 11.8 inches longer than the IS sedans, two convenient fold-forward lock-release levers are standard on both sides of the front passenger seats, making it easier to operate from any location inside the vehicle. The passenger seat features a power slide button on the top of the seatback to ease rear seat ingress/egress. An available new automatic one-touch, easy-entry power-seat mechanism provides even easier egress and ingress through quick-acting, front-seat fold-and-slide activation. The two passenger doors also have three open-stopping positions (rather than the normal two) to add convenience in various parking situations with different spacing between vehicles. The IS C also is equipped with a standard power tilt and telescoping steering column to help the driver quickly get into a comfortable position.

The optional Intuitive Park Assist (IPA) system uses ultrasonic sensors to detect objects close to the car's front and rear bumpers, alerting the driver and showing distance to objects in the multi-information display within the speedometer. When any IS model is also equipped with the optional navigation system, information on objects detected in the rear are shown in greater detail on that system's seven-inch display via the backup camera.

Lexus Safety & Security
Standard Vehicle Dynamics Integrated Management System (VDIM) governs all of the vehicle's dynamic handling systems - the Anti-lock Braking System (ABS), Brake Assist, Vehicle Stability Control (VSC) and Traction Control (TRAC) - employing them collectively and seamlessly to make corrections while helping provide higher dynamic capability. VDIM also interfaces with the electronic throttle control system.

Lexus IS250C

The new Lexus IS250C.

The new model combines the award-winning design of the IS sports saloon with outstanding open-top engineering ingenuity.
The IS250C displays Lexus quality and attention to detail in every aspect of its construction and is designed to exceed customer expectations with its fusion of top-down driving pleasure and uncompromised dynamic performance.
It also boasts the fastest opening time for a three-part roof design, with its lightweight aluminium structure folding away in just 20 seconds.

The EXTERIOR DESIGN
The Lexus IS250C builds on the elegant proportions, sweeping, sculptural lines and contrasting convex and concave surfacing of the IS saloon range to combine the muscular appeal of a sports coupe with the stylish lines of a convertible.
Only the bonnet, headlamps, door handles and mirrors are shared with the IS saloon, all other body panels have been redesigned to ensure they harmonise perfectly with the three-part folding roof.


The INTERIOR DESIGN AND COMFORT
The Lexus IS250C offers the same high levels of luxury and practical innovation as the IS saloon, with a number of bespoke technical revisions designed to ensure the on-board comfort and entertainment systems operate effectively when the roof is down.
The instrument panel, surrounding elements and the steering wheel are the same as on the IS saloon, but the instrument binnacle in front of the driver has been extensively revised to ensure good visibility is maintained during top-down driving.
The climate control system has been configured for top-down motoring, with the addition of speed sensitive control, which automatically increases air flow when the roof is lowered and further increases it in line with vehicle speed.



The RIDE COMFORT
The Lexus IS250C uses the proven front double wishbone and multink rear suspension format from the IS saloon range to give sporting, agile performance. Significant chassis revisions promote greater ride comfort suitable for a convertible and ensure consistent dynamic performance in both coupe and convertible guise.
Extensive temperature, vibration and shaking tests were carried out to ensure the changes to the bodyshell and chassis maintain NVH characteristics almost identical to those of the IS saloon. Class-leading low wind noise levels are achieved with help from acoustic glass for the windscreen and painstaking design of the roof, door and window panel seals.

The SAFETY
The Lexus IS250C has been designed to achieve a five-star frontal impact rating in Euro NCAP crash testing, with world-class safety performance in both coupe and convertible configuration. Numerous changes in the body structure enhance collision strength, roll-over protection and torsional rigidity, minimising cowl shake and optimising chassis control.

For added protection when driving with the roof down, the Lexus IS250C is equipped with new-design larger side airbags that provide head protection in the event of a side impact. The bodyshell also features additional energy-absorbing side impact pads for both front and rear seat occupants.

Lexus LFA

Lexus LFA

The new Lexus LFA marks an important moment in both the history of Lexus and the development of the supercar. A true "clean-sheet" design, the Lexus LFA was created by a small, passionate and dedicated team of engineers whose achievement has been to push the boundaries of technologies materials and engineering at every stage to produce a car like no other to have carried the Lexus badge.

CARBON FIBRE CONSTRUCTION
Keeping the car's weight to an absolute minimum was one of the defining elements in the development of the Lexus LFA and this led to the decision to switch from using aluminium for the car's construction to advanced Carbon Fibre Reinforced Plastic (CFRP) for the chassis and bodywork.
Lexus decided the CFRP structure should be built in-house rather than by a third-party supplier. It drew on Toyota Motor Corporation's heritage in textile weaving technology to push the boundaries of its technical abilities, developing new carbon fibre looms and a laser system for monitoring the integrity of the material.

The Lexus LFA
At four times the strength of aluminium, CFRP gives the Lexus LFA an exceptionally stiff and strong structure, and also delivers major weight advantages, saving around 100kg on an equivalent aluminium body. CFRP accounts for 65 per cent of the body-in-white, with aluminium alloy used for the remaining 35 per cent.
The Lexus LFA uses the same advanced resin technology favoured by cutting-edge aerospace programmes for its unmatched weight and strength properties.

The engine
The heart of the Lexus LFA is a bespoke, naturally aspirated V10 engine that sets new standards for compact dimensions, lightweight architecture and scintillating performance. From the outset it was determined the engine should have a 4,805cc capacity, develop 552bhp and rev to a wailing 9,000rpm red line. A 72-degree angle between the cylinder heads is ideal for achieving balance in the engine for exceptionally smooth running, while providing individual, electronically controlled throttle bodies for each cylinder gives excellent throttle response.
Using a dry sump lubrication system allows the block to be positioned deep in the engine bay, lowering the car's centre of gravity and moment of inertia, and enabling the engine to handle sustained, high-speed cornering.

The V10 produces 480Nm of torque at 6,800rpm, 90 per cent of which is available from 3,700rpm all the way to the 9,000rpm red line, thanks to Dual VVT-i technology, equal length exhaust manifolds and high-volume, 12-hole fuel injectors. This gives searing in-hear acceleration at all engine speeds and in any gear: nought to 62mph takes just 3.7 seconds and maximum speed is 202mph.

With a kerb weight of 1,480kg, the Lexus LFA has a power to weight ratio of 373bhp per tonne, while specific output of 115bhp per litre is among the highest of any current supercar, aided by a high, 12:1 compression ratio, low friction internals and optimised intake and exhaust flow.
The V10 is an object lesson in compact and lightweight packaging, being about the same size as a regular V8 engine and weighing about as much as conventional V6. It is also as reliable and refined as any other Lexus power plan and exceeds Euro 5 emissions standards.

The engine was developed in conjunction with Yamaha through the established collaborative partnership between Toyota Motor Corporation and the Japanese specialist engineering company.

The Transmission
The formidable performance of the V10 is managed through an equally advanced transmission, a purpose-designed six-speed Automated Sequential Gearbox (ASG) that drives the rear wheels via a limited slip differential. To help achieve the optimum 48:52 front-to-rear weight distribution, it is contained in a transaxle mounted over the rear axle.
The ASG is operated by paddle shifts mounted on the steering column and is engineered for exceptionally fast shifts: an upshift can be effected in just 0.2 seconds.
The system has four driving modes: Auto, Sport, Normal and Wet, activated by a selector dial on the dashboard. Each mode has a specific gearshift programme, and engine and brake control logic systems to let the driver tailor the car's performance to suit driving conditions.

The Sound
The Lexus LFA's acoustics, induction system and exhaust notes have been specially tuned to deliver an awesome "soundtrack" that expresses the car's extreme performance, both outside and inside the cabin. Referred to by the acoustic team as "Octave Harmony", it is inspired by the sound of a Formula 1 engine at full revs and is unlike that of any other road car, with different harmonic qualities created as the engine moves up towards its maximum 9,000rpm.

Braking
The Lexus LFA has one of the most advanced and powerful braking systems fitted to any production car, appropriate to meet the demands of its 200mph-plus performance capabilities.

The brake discs are made of Carbon Ceramic Material (CCM), which as well as being lighter than steel, gives fade-free performance in all conditions. The front discs are 390mm in diameter and 34mm thick, gripped by six-piston aluminium callipers; the rear discs measure 306mm across, are 28mm thick and are fitted with four-pot callipers. All use high-friction micron pads, manufactured exclusively for use with CCM brakes.

SUSPENSION, WHEELS AND TYRES
The track-tuned suspension is the result of intensive development work carried out by Lexus at the Nürburgring's Nordschleife circuit to give the best possible balance between control and comfort.
The bespoke wishbone front/multilink rear design makes extensive use of aluminium alloy for high strength and low weight, and the aluminium monotube dampers are the same as those Lexus used for its LFA race car in the Nurburgring 24-hour race.
The 20-inch forged aluminium BBS wheels are shod with asymmetric Bridgestone tyres: 265/35ZR20 at the front and 305/20ZR20 at the rear.

AERODYNAMICS
The Lexus LFA boasts class-leading aerodynamics to achieve drivetrain cooling and superb high-speed handling and stability. Extensive wind tunnel testing helped produce a wind-cheating profile with a drag coefficient of 0.31, a remarkable achievement given the degree of downforce the car creates at high speed.
The airflow is precisely controlled over, under and around the car. A carbon fibre rear diffuser and flat underbody generate significant downforce, with an active rear wing, complete with a gurney flap on the leading edge, boosting the level further still.

STEERING
The race-tuned steering gives outstanding response and feedback to create a perfect dynamic link between car and driver. The constant-rate rack and pinion system uses an innovative column-assist Electric Power Steering System that does not sap engine performance.

The large-diameter column shaft is mounted directly on the central chassis structure, giving the steering layout exceptional rigidity. The carbon fibre steering wheel has a flat bottom section and houses the engine starter button and instrument information selector switch. It can be adjusted for reach and rake.

The Exterior Design
Long wheelbase and short overhangs, sophisticated aerodynamics and low-slung cabin, the Lexus LFA's lines flow from roof to sill in a seamless convex to concave line. As well as its low weight and high strength, carbon fibre reinforced plastic (CFRP) also gave the designers more freedom to create shapes, curves and edges that would have been impossible with metal.
The design rationale behind all current Lexus models. Form follows function, as witnessed n the numerous air intakes and aerodynamic details, and even in the design of the door mirrors, shaped to channel air over the car's shoulders into the rear intakes.

The Interior Design
The low-slung cabin is divided into three zones: the mechanical zone, which includes the skeleton of the car's construction; the human zone, with two seats placed right at the centre of the car; and the driving zone, with high-tech instrumentation that brings driver and machine together.
The cabin is hand-built, with driver-focused ergonomics. The seats, upholstered in fine leather and Alcantara, provide the high level of back and side support needed in a car capable of 200mph-plus performance. The trim echoes the advanced materials used in the Lexus LFA's construction, with exposed areas of both matt and gloss carbon fibre. Trim details are finished in brushed metal and the floor-hinged brake and throttle pedals are made of forged aluminium. As with the exterior finish, owners can choose different interior colours and details to suit personal taste.

INSTRUMENTATION
The compact, hooded instrument panel combines an LCD display panel with a colour Thin Film Transistor (TFT) and a motor-drive movable ring. It features a single circular dial with a central tachometer with an LCD needle. When engine speed exceeds 9,000rpm, the display area turns red to prime the driver for an up-shift. It can also be programmed to turn yellow or green when the revs reach a user-selected range. The dial also houses a digital speedometer and gear indicator, transmission mode, vehicle control data and trip information displays.

When the car is started, an instrument display sequence is triggered, creating a sense of occasion, culminating in the four digital dials showing oil and water temperatures, fuel level and oil pressure radiating out from the centre of the rev counter to take up their positions on either side of the central dial.

SAFETY
Passive and active safety provisions are in line with the Lexus LFA's exceptional performance. The central carbon fibre reinforced plastic central structure is extremely strong and provides excellent impact protection. Crash boxes are fitted front and rear that are designed to deform in a controlled fashion in the event of an impact. That at the front is made of CFRP; that at the rear from extruded aluminium. Side impact protection includes strong and rigid carbon fibre side members and door structures comprising an aluminium inner panel and a Glass fibre reinforced Sheet Moulding Compound (G-SMC) outer skin.
The Lexus LFA is equipped with Lexus's Vehicle Dynamic Integrated Management (VDIM) system, which co-ordinates the smooth operation of the ABS, vehicle stability and traction control systems as the vehicle approaches its performance limits, based on critical data on brake operation, yaw and roll rates, individual wheel speed and longitudinal, lateral and vertical acceleration

Passive safety features include two-stage adaptive front airbags and seatbelt airbags for driver and passenger and a driver's knee airbag.

The Specifications

* ENGINE
o Engine Type: 1LR-GSE
o Cylinders/arrangement: V10
o Valve mechanism: 40-valve DOHC
o Displacement: 4,805 cc
o Bore x Stroke: 88.0 x 79.0 mm
o Compression ratio: 12.0:1
o Fuel Injection Type: EFI
o Octane Rating : 95 or higher
o Max. Power: 552 bhp @ 8,700 rpm
o Max Torque: 480 Nm @ 6,800 rpm
o Max. engine speed: 9,000 rpm
o Exhaust emissions certification: Euro 5
* PERFORMANCE
o 0-62 mph (0-100 km/h): 3.7 s
o Max. speed: 202 mph (325 km/h)
* DIMENSIONS
o Overall length: 4,505 mm
o Overall width: 1,895 mm
o Overall height: 1,220 mm
o Wheelbase: 2,605 mm
o Track
+ front: 1,580 mm
+ rear: 1,570 mm
o Overhang
+ front: 940 mm
+ rear: 960 mm
o Coefficient of Drag: 0.31 Cd
o Fuel tank capacity: 73 l (16.1 gallons)
* WEIGHTS (kg)
o Kerb weight: 1,480 - 1,580 kg
o Gross vehicle weight: 1,700/1,750 kg
* TRANSMISSION
o Gearbox type: 6-speed Automated Sequential Gearbox
o Front counter gear ratio: 1.259
o Gear ratios
+ 1st: 3.231
+ 2nd: 2.188
+ 3rd: 1.609
+ 4th: 1.233
+ 5th: 0.970
+ 6th: 0.795
o Final drive ratio: 3.417
o Maximum permissible speed
+ 1st: 52 mph
+ 2nd: 76 mph
+ 3rd: 104 mph
+ 4th: 136 mph
+ 5th: 172 mph
+ 6th: -
* BRAKES
o Front: Cross-drilled ventilated discs, 399 x 34 mm
o Rear: Cross-drilled ventilated discs, 360 x 28 mm
* SUSPENSION
* Front: Double wishbone with anti-roll bar
* Rear: Multilink with anti-roll bar
* STEERING
* Steering gear type: Rack and pinion
* Power steering type: Electric
* Ratio: 14.3
* Turns lock to lock: 2.35
* ELECTRICAL SYSTEM
* Battery capacity: 12V-48AH
* Alternator output: 2,640 W
* Starter output: 1.7 kW
* TYRES AND WHEELS
* Wheels
* Front: 20x9.5J BBS alloy
* Rear: 20x11.5J BBS alloy
* Tyres
* Front: 265/35R20 95Y
* Rear: 305/30R20 99Y

Lexus LS 600h L

The Lexus LS 600h L luxury sedan was the first vehicle to bring fuel-efficient gasoline-electric hybrid technology to the prestige luxury segment.
The Lexus LS 600h L provides the brand's highest level of performance and technology, and the truest expression of luxury.

The Engine/Transmission/Drivetrain/Performance

The Lexus LS 600h L is powered by the ultra-quiet Lexus Hybrid Drive system, which was the world's first to combine a V8 gasoline engine with an all-wheel-drive (AWD) hybrid drivetrain. The system combines a 5.0-liter V8 gasoline engine with two powerful electric motors and a large-capacity battery pack.

The hybrid powertrain generates a peak combined output rating of 438 horsepower and can effortlessly accelerate the Lexus LS 600h L from zero-to-60 mph in just 5.5 seconds.
Mid-range acceleration is even more impressive. The electric motor system is capable of delivering maximum torque on demand and is most beneficial during passing maneuvers.
The Lexus LS 600h L can accelerate from 50-70 mph in a rapid 3.5 seconds.
Its combined EPA fuel economy rating of 21 mpg is equal to or better than the combined fuel-economy ratings of some V6 all-wheel-drive mid-sized luxury sedans.

The innovative V8 features an electric motor-driven Variable Valve Timing with intelligence and Electrically controlled intake cam (VVT-iE). This combination of VVT-i with electric-motor driven intake and an oil controlled VVT-I exhaust system achieves superior engine-startup operation and high-output performance.
A specially developed Hydrocarbon Adsorber and Catalyst (HCAC) system is linked to the two-way exhaust to help prevent hydrocarbons contained in the exhaust from being released into the atmosphere during cold start up when the catalysts are not up to temperature.

Lexus Minority Report Sport Car

Lexus LF-A Roadster Concept, 2008

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.

Lexus LF-A Roadster Concept Preliminary Specifications

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