Lexus GS 450h, 2010

Lexus GS 450h, 2010

The Lexus GS 450h hybrid luxury sport sedan enters the 2010 model year with stylish exterior changes. Several exclusive design features, including grille, clear taillamp covers and 18-inch alloy wheels, were updated for 2010 and add to the existing advanced technology, high performance and indulgent luxury of the rear-wheel-drive Lexus GS 450h. Unique, blue hybrid badging is shared across the Lexus hybrid line-up and also distinguishes the Lexus GS 450h from the gas-powered GS 460 and GS 350.

Engine/Transmission/Drivetrain/Performance
Based on the GS platform and featuring Lexus Hybrid Drive technology, the Lexus GS 450h offers V8-like performance with greater fuel efficiency. In addition to boosting performance and fuel efficiency while lowering emissions, Lexus Hybrid Drive technology also further accentuates the brand's renowned smooth, quiet operation.

A full hybrid, the Lexus GS 450h is capable of operating in gas-only or electric-only modes, or a combination of the two. With its unique transmission, the Lexus GS 450h was the first hybrid vehicle to enable the electric drive motor to contribute to highway performance, not just slow-speed driving.

The Lexus GS 450h model's version of the Lexus Hybrid Drive powertrain combines a powerful 3.5-liter V6 engine with a compact, permanent magnet electric motor - all driving the rear wheels. The hybrid powertrain collectively produces 340 horsepower and can effortlessly accelerate the Lexus GS 450h from zero-to-60 mph in just 5.2 seconds.

Just as impressive as the Lexus GS 450h's acceleration from a stop is how quickly and powerfully torque is delivered during mid-range acceleration. The hybrid system's electric-drive motor delivers maximum torque immediately upon demand. This unique power-delivery characteristic is most noticeable, and most useful, during 30-to-50 mph passing and in traffic-merging maneuvers. The Lexus GS 450h returns EPA-estimated fuel economy of 22 mpg city/25 highway/23 combined and is certified as a Super-Low Emissions Vehicle II (SULEV II).

One of a new generation of Lexus engines, the gasoline V6 uses an Electronic Throttle Control System with intelligence (ETCS-i) and a dual fuel-injection system that combines the benefits of direct injection with those of port injection. Dual Variable Valve Timing with intelligence (VVT-i) operates on the intake and exhaust valves to further enhance power and torque across a broad engine speed range.

The Lexus GS 450h hybrid powertrain uses two motor-generators, MG1 and MG2 (the drive motor). Each performs specific functions and can operate as both a motor and a generator, although MG1 is used as a starter motor and provides no motive force. The engine-driven generator (MG1) can charge the battery pack or provide additional power to MG2 as needed.

A 288-volt DC Nickel Metal Hydride (Ni-MH) battery pack is installed behind the rear seat area. The battery's power is directed through a "boost converter" that can efficiently raise voltage to a maximum 650V DC. An inverter changes this to AC, providing its elevated power to the 147-kW electric motor, which turns as high as 14,400 rpm. A 12-volt auxiliary battery powers various vehicle systems, including audio and navigation.

Power from the gas engine and MG2 is distributed to the rear drive wheels via a planetary gear-type Electronically-controlled Continuously Variable Transmission (ECVT). This special transmission, which eliminates specific gear ratios, features a two-speed torque-multiplication device that allows drivers to select from among three driving modes: Power, Normal and Snow. "Normal" provides the smoothest operation and is ideal for city or suburban driving; "Power" sharpens accelerator pedal response, and "Snow" mode softens accelerator pedal response making it easier to travel on slippery road surfaces.

The ECVT consists of a motor generator, motive power-dividing mechanism, two-stage motor-reduction device, electrically powered oil pump and hydraulic control system. The two-stage torque-multiplication device varies the gear ratio in two stages by controlling a planetary gear and two wet brakes, similar to the way a conventional automatic transmission operates.

The Lexus GS 450h is driven solely by its electric motor when starting, traveling slowly, and during low-load driving, the resulting super-quiet operation enhancing the luxury experience. A regenerative braking system further boosts system efficiency. When the vehicle is coasting or the brakes are applied, the electric motors function as generators, capturing kinetic energy that would normally be lost as heat through the brakes and transforming it into useable electricity to recharge the batteries.

Chassis/Body/Suspension/Tires/Brakes
The Lexus GS 450h matches its powerful acceleration with responsive handling while maintaining the ultra-comfortable ride that is synonymous with the Lexus brand. Instead of attempting to mask noise, the engineers designed fans and motors to significantly reduce cabin-noise intrusion. Fluid-filled front-engine mounts, additional sound-absorbing asphalt sheets behind the instrument panel, and a sound-absorbing windshield further enhance the quiet ride that redefines the term "Lexus-like."

Double-wishbone front and multilink rear suspension systems endow the Lexus GS 450h with engaging handling performance. Like the V8-powered GS 460 gas model, the GS 450h is equipped as standard with Adaptive Variable Suspension (AVS), a driver-selectable shock absorber damping system.

The standard 18 x 8-inch aluminum alloy wheels are unique to the 2010 GS 450h and equipped with 245/40R18 Z-rated summer performance tires; all-season run-flat tires are available. An optional Active Power Stabilizer system helps to further reduce body sway during cornering. The system uses an Electronic Control Unit (ECU) to calculate the force needed to counter excess body sway, which is then applied to the stabilizer bars by front and rear electric-powered actuators.

Safety/Security Features
All Lexus GS models implement a wide array of advanced safety systems. The Supplemental Restraint System (SRS) includes variable-force front airbags for both the driver and front passenger. Sensors are designed to determine the severity of an impact and in turn the airbag deployment force, helping to provide an appropriate level of occupant restraint. The GS features a total of eight standard airbags including seat-mounted side airbags for the front seats, knee airbags for the driver and front passenger, and front and rear side-curtain airbags.

The optional Pre-Collision System (PCS) can help reduce damage in an accident. A millimeter-wave radar sensor helps detect obstacles in front of the car, while vehicle speed, steering-angle and yaw-rate inputs help to determine whether a collision is unavoidable. In such a situation, PCS switches the AVS to sport mode to help provide appropriate chassis response, preemptively retracts front seat belts, and pre-initializes BA so that increased braking will be applied the instant the driver depresses the pedal. The active-braking feature will automatically apply the brakes up to a deceleration rate of 0.3 G's if the driver fails to react to system warnings.

Luxury/Comfort/Convenience
As the top model in the GS line, the Lexus GS 450h features the highest level of standard luxury equipment and includes features that are optional on other GS models: 10-way power-adjustable heated and ventilated front seats, rain-sensing automatic windshield wipers, rear back-up camera and headlamp washers. Controls are simple and intuitive, avoiding needless complexity.

Exterior Design
The current generation GS sedans introduced the brand's L-finesse design language. A 112.2-inch wheelbase, long hood, pulled-back cabin and short rear deck create a confident, powerful stance for the GS. A low 0.27 coefficient of drag (Cd) helps to maximize highway fuel efficiency and minimize wind noise. Subtle visual differences distinguish the Lexus GS 450h from other GS models. These include a blue hybrid designation on the side rocker moldings, aluminum-and-blue enameled rear model designation, front grille, special 18-inch light-alloy wheels, a Lexis Hybrid Drive engine cover, blue front and rear "L" logos, a blue tint to the headlamps, clear tail lamp covers and a power meter that replaces the tachometer.

Interior Design
Ultra-premium wood, polished-metal accents and leather trim endow the GS interior with a lavish yet high-precision feel. Touch points convey quality, and controls respond fluidly. Regency leather-trimmed seats are available in Light Gray, Parchment or Black leather matched with wood trim in Dark Gray Bird's-eye Maple, Golden Bird's-eye Maple or Red Walnut, respectively. The wood and leather-trimmed three-spoke steering wheel - featuring audio and multi-information display controls - is complemented by a matching shift knob. The three-pod analog instrument cluster features an electrochromic display and variable-transparency glass for high visibility in a variety of light conditions.

Lexus Enform and Safety Connect
The Lexus GS 450h offers an all-new telematics system, Lexus Enform with Safety Connect, available by subscription. Complimentary one-year trial subscriptions are included on all purchases of new Lexus vehicles equipped with these features. Both the Lexus Enform and the Safety Connect response center operate 24 hours a day, 7 days a week—every day of the year.

Safety Connect, the cornerstone of the services, is available on both non-navigation and navigation-equipped Lexus GS 450h and offers four safety and security features: Automatic Collision Notification, Stolen Vehicle Location, Emergency Assistance Button (SOS), and Enhanced Roadside Assistance, which adds GPS data to the already included warranty-based Lexus roadside service.

Lexus Insider, a complimentary, opt-in service is also available without a subscription on all Lexus Enform-equipped vehicles. This feature offers in-vehicle audio casts that provide owners access to useful vehicle tips and event information, and insights into exclusive owners' benefits - all designed to further enhance the Lexus experience.