Global Debut of All-New Lexus LC 500

Design and Engineering Teams United
Beyond its styling and impactful performance, the new LC 500 serves as a symbol of the achievement that can result from heightened collaboration between design and engineering groups and their commitment to help overcome each other’s hurdles. When Akio Toyoda challenged these development groups to produce this special car, it meant surpassing many manufacturing, design, material, and dynamic obstacles that could typically compromise a vehicle’s targets or design vision.

The LC 500 was driven by a strong, appealing fundamental design target (LF-LC), and engineering teams worked tirelessly to find new solutions to maintain as much of the concept in the production car as possible. Likewise, vehicle designers were very involved from the earliest stages of the dynamic development process to understand the engineering targets and collaborate with design viewpoints and potential solutions.

“Design and engineering sides worked together on issues and obstacles that were overcome one by one. I feel we achieved something greater than simply preserving the spirit of the concept’s design,” said Chief Engineer Koji Sato.  

Exterior Design
At first glance, it becomes apparent that the engineering and design team’s collaboration was highly successful, considering how much of the LF-LC’s design ideology the team was able to transfer into the new LC 500. The new production model shares many of the key design elements, proportions and visual dynamism of the concept car that inspired it.

The LC 500’s front fascia features a powerful interpretation of Lexus’ distinctive grille, bordered by chrome on three sides and a radical new 3D mesh design that varies its visual tension. The “L”-shaped daytime running lights rest below a new Triple LED headlamp unit, specially designed to include one of the industry’s thinnest projectors enabling a low hood with a short front overhang.

“At an early stage, the designers collaborated with the engineers to understand their image for the LC 500’s driving dynamics, and they incorporated this into the design,” said Tadao Mori, the chief designer of the LC 500. “For example, we gave serious consideration to where the driver’s eyes would focus, and designed the surface shape in that area to help support a driver’s mindset. This project was one of the first times that designers were closely involved in the dynamic engineering development so we could understand the driving goals and support with the car’s design.”

Chassis
In helping to drive the future of the Lexus brand, the mission for LC 500 is to offer a dynamic driving experience and character unlike any Lexus vehicle prior to it. The pursuit of a sharper, more refined driving experience became the mission for the development team who also sought to maintain a superior Lexus ride quality befitting a flagship luxury sport coupe. 

The LC 500 is the first Lexus to use the brand’s all-new, premium rear-wheel-drive luxury platform and is part of the new corporate global architecture for luxury vehicles (GA-L). The underpinnings of this new coupe will become the blueprint for the company’s future front-engine/rear-wheel-drive vehicles. In an effort to sharpen the car’s handling, the LC 500’s engineers focused on the platform’s fundamentals by placing most of the mass, including the engine and the occupants, in a position more centralized and lower in the chassis to improve the center of gravity.

Internally, Lexus engineers referred to this menu of mass-arranging tactics as the “inertia spec.” The driver hip and heel points have been lowered, wheels have been pushed to the corners of the car with shortened overhangs, and the drivetrain mass has been located behind the front axle line to create a front mid-ship layout. The LC 500 also relies on run-flat tires to improve packaging, reduce weight (thanks to no spare), and help shorten overhangs to achieve dynamic targets. The 12-volt battery has been relocated to the trunk as part of the mission to redistribute weight.

Other mass management measures include the available carbon fiber roof, aluminum door skins mounted to the carbon fiber door inner structure, and a composite trunk floor. The LC 500 also represents the Lexus brand’s most intensive use of high-strength steel. This provides enhanced rigidity while reducing—and ideally positioning—vehicle mass to optimize dynamics. As a result, the LC 500 is very balanced with a nearly ideal front/rear weight distribution of 52/48.

To help achieve the level of chassis performance targeted for this new coupe, Lexus engineered the stiffest unibody the brand has ever produced. For LC 500, the strategic use of lightweight, high-strength steel helps make for a high degree of torsional rigidity that is more resistant to twisting forces than the exotic, carbon fiber-intensive LFA supercar.

Particular attention was devoted to the LC 500’s multilink suspension system. Double ball joints on the upper and lower control arms allow for control of the smallest movements from the driver inputs and road conditions. Beyond sharing workload, a dual ball joint arrangement helps optimize suspension geometry to increase wheel control and create a more precise steering response with better initial effort.

Helping power transfer to the rear wheels is a newly developed 10-speed automatic transmission—the first ever in a luxury automobile—with shift times rivaling those of a dual-clutch transmission. The component is smaller and lighter than some current 8-speed transmissions. The wide bandwidth of shifting afforded by 10 closely spaced gears is ideal for all forms of driving, providing an optimal gear in all conditions. This transmission is matched to a new electric control system with software that helps anticipate the driver’s inputs by monitoring acceleration, braking and lateral g forces.

The new transmission is just one key element in a vehicle that has had all of its dynamic control elements such as power application, braking, and steering tuned to operate rhythmically in sport driving conditions. Drivers will feel the controlled balance between the quick, smooth shifting actions, the application of linear engine power, and the deceleration afforded by 6-piston front brake calipers (4-piston at rear).

All of the platform and drivetrain engineering helped endow the LC 500 with performance and agility uncommon for a four-person coupe; the vehicle targets a 0 to 60 mph time of less than 4.5 seconds.
 
Interior Electronics
This flagship coupe will debut the 2017 Lexus Multimedia package that will feature updated, faster, more flexible software enabling future enhancements and a more inviting graphic user interface. Occupants also will be treated to an exceptional audio experience inside the cabin: in addition to the available audiophile-worthy Mark Levinson audio package, a new premium Pioneer audio system comes as standard equipment. Pioneer’s sound engineers worked in collaboration with LC 500 body and cabin designers to enhance interior sound performance within the cabin, studying the acoustic environment and driving structural changes to enhance sound performance.

The LC 500 also will boast Lexus’ renowned safety technology, Lexus Safety System + , which integrates several of Lexus’s active safety technologies: an All-speed Dynamic Radar Cruise Control (All-speed DRCC) that relieves stop-and-go traffic stress, the Pre-Collision System (PCS) helps prevent and mitigate collisions; Lane Keep Assist (LKA) helps prevent vehicles from departing from their lanes; and  Automatic High Beam (AHB) that helps ensure optimal forward visibility during nighttime driving.
 
These technologies are part of a multi-faceted approach to active safety, the Lexus Safety System + package, and combines millimeter-wave radar with a camera to help achieve a high level of system reliability and performance.

*Spec and equipment might differ by market

Specifications