Ever since computer simulations became available for engineers to test many aspects of a vehicle under development, a lot of the work of building actual prototypes has been eliminated. That has saved a lot of time and cost for automakers.
With supercomputers, sophisticated simulations can be run to see what happens to a car at high speeds and also what happens when it crashes. However, at some point, real full-sized prototypes have to be built to validate all the calculations in real-world conditions. Less prototypes need to be built but this part of the vehicle development process is still necessary.
Recently, Hyundai Motor Company’s high-performance N division unveiled its next-generation ‘Rolling Lab’ called the RN24 which is an advanced test vehicle that demonstrates the future possibilities of high-performance electric vehicles.
As Hyundai N’s next-generation Rolling Lab, the RN24 is the latest evolution in an innovative series of test vehicles that bridge the gap between motorsport technology and N production high-performance models. Originating with the RM (Racing Midship) series in 2012 and including EVs such as RN22e and N Vision 74, Rolling Labs serve as testbeds for high-performance technologies.
Inspired by the desire to fit the most powerful EV powertrain into the smallest possible package, Hyundai N applied the IONIQ 5 N’s motorsport-capable 650 ps dual-motor power electronics (PE) system. This was installed into a compact World Rally Championship-inspired EV chassis, resulting in a compact, lightweight and agile EV designed for N-thusiasts.
A redesigned battery pack retains the production model’s 84 kWh capacity but allows for a 340 mm shorter wheelbase, bringing this down to B-segment size, comparable with the i20 N Rally1 Hybrid World Rally Championship (WRC) car. The chassis system also uses a newly designed WRC-style suspension set-up with rally-spec dampers and high-rigidity subframes.
This Rolling Lab is equipped with the WRC Powertrain Drive Control Logic system. This advanced system empowers drivers to adjust PE Power, Acceleration Sensitivity, Regenerative Brake Sensitivity, and PE Power Balance using steering wheel buttons.
This functionality mirrors the control features found in Hyundai WRC rallycars. Furthermore, the RN24’s battery and motor cooling performance are ensured by modifications to IONIQ 5 N’s advanced system, and extra agility is achieved by a faster steering setup that delivers rallycar-level response.
Among the RN24’s many cutting-edge motorsport technologies, its ‘Rally Mode’ motor torque control is a key differentiator. Like Hyundai N’s 4-wheel drive system used on the i20 N Rally1, this set-up helps optimize the distribution of torque to all four wheels.
The performance of the i20 N Rally1’s mechanical technology is simulated by RN24’s ‘Rally Mode’ electronic motor torque control, streamlining the system in terms of complexity and cost for a more realistic application in future production cars.
The test vehicle features an external high-output sound system, with two side speakers in addition to IONIQ 5 N’s N Active Sound+ setup. Its soundtrack is augmented by a rear fender design that acts as a soundbox, enhancing the sound experience and creating an immersive soundtrack for fans that complements the vehicle’s high-performance capabilities.
The e-Handbrake is another technology inspired by Hyundai N’s 10-year history in the WRC. It helps reduce weight by eliminating the need for physical brakes used in processes such as side brake pre-heating, and hydraulic brake installations that were used previously. Hyundai recently tested this innovative technology on a stage of the WRC’s Central European Rally.
The RN24 is defined visually by its highly rigid, exoskeleton-style exposed roll-cage. Inspired by WRC concepts, this not only ensures occupant safety but also adds to the vehicle’s overall performance and stability during high-speed manoeuvres. The application of N Performance Parts includes Elantra N 19-inch matte black forged wheels that add to the vehicle’s aesthetic appeal and contribute to its performance.
In addition, there is a spoiler from Hyundai Motorsport’s Touring Car Racing models. This spoiler enhances aerodynamic performance, improving agility and stability. RN24 also implements 3D-printed gussets for better rigidity and weight reduction.
“RN24 exemplifies Hyundai N’s commitment to advancing electric motorsport technology by prioritizing the driving experience rather than spec numbers,” said Joon Park, Vice-President of N Brand Management Group. “This Rolling Lab proves that there remains untapped potential for high-performance EVs and with new technologies ahead, there is much to look forward to.”
