Outlandish RN22e prototype isn’t a production car – yet…
New 577bhp track weapon is dynamic showcase for range of electric N cars; first will be hot Ioniq 5 in 2023
The outlandish new Hyundai RN22e concept is a race-inspired vision of what to expect from the brand’s coming performance EVs – the first of which will be the Hyundai Ioniq 5 N.
To all intents and purposes, the prototype looks like an N version of the new Hyundai Ioniq 6, albeit with more overtly track-focused cues, but Hyundai has stopped short of confirming a production Ioniq 6 N.
Till Wartenberg, vice-president of N brand-management and motorsport, did however confirm that the performance version of the Ioniq 5, the Ioniq 5 N, is coming to market next year.
Hyundai calls the RN series ‘rolling lab concepts’. They don’t necessarily preview production cars but rather serve as development platforms that prove and refine new technology, as well as explore future styling.
The RN22e follows the RM20e and RM19, which used Hyundai Veloster bodyshells to develop electric drivetrains and mid-engined layouts respectively.
The RN22e is the closest RN to a potential production car so far, taking the recently unveiled Ioniq 6 saloon and adding deeper air dams, diffusers, a different spoiler, larger wheels and wider arches, thereby giving it a more aggressive stance.
Rather than confirming the Ioniq 6 N, its styling serves more to gauge interest for such a model.
Mechanically, it will be going out on track to develop new ways of injecting engagement into electric performance cars and avoid them feeling simply like faster versions of standard EVs.
During the car’s presentation, Hyundai acknowledged the challenges of achieving this differentiation. As such, the RN22e explores ways of reducing weight, compensating for the lack of engine noise and making EVs stand up to extended track driving.
The main weapon in the RN22e’s dynamic armoury is its torque-vectoring capability. Although it has only one motor on each axle (unlike cars such as the Audi E-tron S and Hummer EV), it achieves the effect of overpowering the outside driven wheels using a clutch pack.
Wartenberg stressed that configurability is becoming a key tenet of the N sub-brand. The RN22e has two motors that give it four-wheel drive (offering up the same 577bhp and 548lb ft as the related Kia EV6 GT), which the N division is putting to good use by letting the driver choose the torque split between the front and the rear axle. Every other EV so far has either managed this automatically or had a fixed split.
Such a setting should inject some much-needed predictable playfulness into a driver’s EV. The ultimate expression of the combination of torque-vectoring and a variable torque split is a drift mode, a feature which will be present in next year’s Ioniq 5 N.
Hyundai claims the one-off track car will top out at north of 155mph. The EV6 GT – taller, less slippery and no doubt weightier – can crack 161mph.
The test bed also serves to explore improved braking for EVs. While regenerative braking means that EVs’ disc brakes tend not to come under a lot of stress on the road, the weight of the battery pack can cause an EV to run out of braking power quite quickly under repeated heavy stress on a track. Hyundai is therefore experimenting with a 400mm hybrid-metal disc.
At the same time, the regenerative braking is used to control yaw – in other words, influence the car’s rotation into the corner.
Finally, the RN22 pipes sounds through the interior speakers, as well as a set of exterior units, to give the car a unique sound signature.
Going even further into the territory of synthetic throwbacks to piston-engined performance cars, the motor control software can simulate the jerk of gear changes.
Source: Autocar
