Acura Unveils All-New Electrified ARX-06 Race Car

Acura Unveils All-New Electrified ARX-06 Race Car

19.08.2022: Electrified Acura ARX-06 prototype sports car features hybrid power unit Exterior design work led by Acura Design Studio Sixth-generation Acura prototype to compete in 2023 IMSA WeatherTech SportsCar GTP Championship, starting with the R


    Electrified Acura ARX-06 prototype sports car features hybrid power unit


    Exterior design work led by Acura Design Studio


    Sixth-generation Acura prototype to compete in 2023 IMSA WeatherTech SportsCar GTP Championship, starting with the Rolex 24 at Daytona




Acura Motorsports today released the first official images and details for the all-new, electrified Acura ARX-06 prototype sports car, which will make its competition debut next January at the Rolex 24 at Daytona.



The latest in a line of successful Acura endurance racing prototypes, the ARX-06 features Acura-specific bodywork and aerodynamics based around an all-new ORECA LMDh chassis which utilizes an electrified hybrid power unit featuring an equally new, bespoke twin-turbocharged 2.4 liter V6 internal combustion engine designed, developed and manufactured by Honda Performance Development [HPD] the racing arm for Acura Motorsports in North America.



"Precision Crafted Performance is at the heart of everything Acura does," said Jon Ikeda, vice president and Acura brand officer.  "If you're a performance brand, you have to go racing. It's that simple.  Both the existing ARX-05 prototype and our production-based NSX GT3 have proven to be race- and championship-winning designs on tracks all across North America.  Now, with the introduction of the new, electrified Acura ARX-06, we look forward to facing off against other premium automotive brands from around the world – and continuing our winning ways."



"HPD has 30 years of race-winning and championship-winning history," said David Salters, HPD President and Technical Director.  "Not only in endurance sports car racing, but in developing championship-winning Honda Civic-based racing cars, the powertrain for the Baja Ridgeline race truck, Formula Regional Americas and Formula 4 powertrains with the Type R engine, and of course the Indy 500 and the IndyCar Series.



"We are HPD.  We race, we develop our engineers and technology through racing.  We have an amazing and unique racing legacy, both past and present. It's what we do as Acura's – and Honda's – North American racing organization. We are looking forward to the challenge of racing Porsche, BMW and GM in IMSA's pinnacle GTP championship.  We are very cognizant this is a big step for us.  We have a lot to learn, but that is why race."



"The new Acura ARX-06 has elements of our Indy-winning technology, Honda Formula One technology and Rolex 24-winning technology in it.  This was achieved using HPD's world-class simulation, design, development and manufacturing technologies; that our own engineers have developed, tested and validated.  We are very proud of that.  Now the challenge and hard work really starts, including grueling 24 hour simulations, and learning how to maximize all aspects of performance."






Powertrain




The Acura AR24e power unit was developed by Honda Performance Development to bring electrification to the Precision Crafted Performance of Acura's endurance sports car racing program.  The complete hybrid power unit is based around the Acura AR24e internal combustion engine (ICE), an all-new bespoke 2.4-lliter, twin-turbocharged direct injection racing V6 that was designed, developed and manufactured by HPD.



At 2.4 liters, this is the smallest displacement ICE conceived by HPD for endurance racing, yet still meets the performance target of 500 kW as measured at the rear axle by torque meters.  It features a 90-degree V-angle to reduce its center of gravity and polar moment of inertia. In addition, the combustion chamber has been designed to run on sustainable low-carbon fuel.



The hybrid power plant includes an IMSA-specified electric Bosch Motor Generator Unit (MGU) and Williams Advanced Engineering battery pack.  The MGU is contained in a common transmission casing and gearbox internals provided by Xtrac.  The battery, within the chassis survival cell, is built by Williams Advanced Engineering. The HPD Electrical Group completed both hardware and software development to best match the spec MGU and battery pack to the Acura ICE.



"We've taken the challenge presented by this new rule package from IMSA, and developed what we believe is a very competitive solution," said Pierre Descamps, who led HPD's powertrain design team for the ARX-06.  "We've gone in a new direction for HPD in the design of the ICE.  It is still a V6, which of course for Honda is well-known, but we have incorporated several new elements which we believe will make best use of the electric MGU and battery pack. Our new engine will rev to the maximum 10,000 rpm set by the rules, so it also makes a wonderful sound!"






Chassis




Both IMSA in North America and FIA World Endurance Championship rules require manufacturers to use one of four approved prototype chassis, fitted with IMSA-homologated, manufacturer-designed and branded bodywork and engines.



In the case of the ARX-06, HPD and Acura have elected to continue their successful relationship with ORECA [ORganisation Exploitation Compétition Automobiles].  Since moving into chassis design and construction in 2007, ORECA has produced a series of winning sports prototypes, including the Acura ARX-05.



"We're extremely pleased with our relationship with ORECA," said Mark Crawford, HPD Large Project Leader for the ARX-06.  They've been great partners throughout both our ARX-05 DPi program and now with the ARX-06.  The GTP [Grand Touring Prototype] project has brought with it a new set of challenges and, while you certainly can see the Acura ‘family resemblance' to our previous collaboration, the ARX-06 is an entirely new design."



HPD's Vehicle Performance Group worked closely with the ORECA design team and engineers to simulate chassis layout geometries and lap time optimization studies.  They also "coded" the new car into HPD's static and dynamic Driver in the Loop simulators to begin development of the car's vehicle dynamics and vehicle dynamic control systems.



Critical to the projects was a clean sheet hybrid powertrain control system, brake-by-wire and vehicle dynamics control system – all written in-house at HPD.  This control system architecture was implemented on a Formula 1-spec ECU hardware platform.  HPD also utilizes its custom, in-house developed ultra-high speed data logging system.



Salters praised the ORECA-HPD relationship during the development process.  "I would like to note the stand-out collaboration between the ORECA and HPD engineering groups. Working with the extremely talented ORECA engineers on chassis and aero design and powertrain installation has been a real pleasure. Both groups have put their heart and soul into this intense project and sophisticated race car," he said.







Bodywork and Aerodynamics




Exterior styling of the Acura ARX-06 was led by the Acura Design Studio in Los Angeles, California, in conjunction with HPD and chassis-supplier ORECA, one of the chassis suppliers approved for prototype competition in both the IMSA WeatherTech SportsCar Championship and the World Endurance Championship.



HPD's aerodynamics engineers and in-house CFD aero engineers worked with the Acura styling studio and chassis builder ORECA to help develop the styling and maximize the aerodynamic performance envelope of the ARX-06, while keeping it within the homologation boxes as specified by IMSA and the FIA.




"The process we used in creating the exterior design for the Acura ARX-06 is exactly the same as how we create a new Acura passenger vehicle," said Dave Marek, Acura Executive Creative Director.



"As part of our Precision Crafted Performance Brand Promise, we treated it as an integral part of our lineup.  The same world-class stylists that lead Acura production car design created initial sketches, then pared those down to several potential designs. Next, we created a scale model, did aero and wind tunnel model testing, and brought HPD and our partner teams in for their feedback," Marek recounted.




"The design continued to be refined throughout the testing and evaluation process, until we came up with a final treatment that met our performance goals while maintaining all-important Acura styling cues. It's been an exciting process."



Driver and team input was also sought throughout the design process. One effective change was a revision to the placement of the rearview mirrors – a seemingly minor adjustment that in fact has a large effect on vehicle aerodynamics. Using VR headsets, the drivers were able to sit in the car virtually and recommend a much lower placement for the side mirrors, improving both the aero efficiency of the ARX-06 and visibility for the drivers.







Partner Teams




Acura will continue its partnerships with the proven, race- and championship-winning Wayne Taylor Racing and Meyer Shank Racing organizations to campaign a pair of hybrid-powered Acura ARX-06 entries in the featured GTP category of the 2023 IMSA WeatherTech SportsCar Championship, North America's premier endurance sports car racing championship.



In addition to sweeping all three major IMSA prototype titles in both 2019 and 2020 – for Manufacturers', Drivers' and Teams – Acura has won the Rolex 24 at Daytona in both 2021 and '22, including a 1-2 finish for the manufacturer at this year's twice-around-the-clock endurance classic.  Additional podiums at Sebring, Watkins Glen and the Petit Le Mans in 2021 resulted in a sweep of IMSA Michelin Endurance Cup titles for Acura and partner Wayne Taylor Racing.     



This season, Wayne Taylor Racing has recorded four wins and a second to rank lead the IMSA Drivers' and Teams' championships heading into the final race of the season at Road Atlanta in October.  Meanwhile, Meyer Shank Racing started off 2022 with a second consecutive Acura victory in the Rolex 24 at Daytona and five second-place finishes in eight races to rank second in both the drivers' and teams' standings.



These results have unofficially clinched the 2022 IMSA Manufacturers' Championship for Acura; while the Drivers' and Teams' titles will go to either Meyer Shank Racing or Wayne Taylor Racing.



- ACURA also photos

Permanent-URL: http://www.automobilsport.com/acura-unveil-all-new-electric-arx-06-race-car---241315.html

19.08.2022 / MaP

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