KERS-Equipped Twizy EV Concept

What happens when you combine Formula1 technology and a small electric car?

Renault chose to explore this “out of the box” idea when it created the Twizy Renault Sport F1 concept car.

Renault said this fun take on the brand’s electric urban compact features muscular styling and impressive performance credentials to serve as a bridge between the world of F1 technology and that of production cars.

The Twizy Renault Sport F1 sits on the wheels of a single-seater race car and is equipped with a front splitter, side-pods, rear wing and a diffuser complete with an F1-style rain light.

Renault declared that the Twizy Renault Sport F1 is much more than just a concept. In addition to its spectacular looks, it delivers genuine high performance thanks to its Kinetic Energy Recovery System (KERS), which is identical to the solution used by Renault-powered Formula 1 cars.

The KERS system instantly boosts power output six-fold to reach almost 100 horsepower and Renault said it is capable of catapulting the car from standstill to 62 mph as quickly as Renault’s highest-performing road car, the Mégane Renaultsport 265.

Renault_Sport_Twizy_KERS-668The Twizy Renault Sport F1 is consequently equipped with two electric motors, i.e. Twizy’s original 17horsepower (13 kilowatt) electric motor to which an F1-style KERS has been grafted.

When the KERS is activated, Twizy Renault Sport F1’s power output climbs instantly six-fold, from 17 to 97 horsepower (72 kilowatt). This boost is available for approximately 13 seconds, just as it is in the case of a Formula 1 car.

When the system is triggered, the maximum revs of Twizy’s motor rise to 10,000 rpm for a top speed of 68 mph.

The KERS’ motor-generator unit fits inside a four inch-diameter cylinder and can rev to as high as 36,000 rpm. The KERS is equipped with its own battery capable of very short charge/discharge cycles. Derived directly from F1 technology, the package weighs barely 30 kilograms, battery included.

Given that the peak revs of the KERS and Twizy’s principal electric motor are 36,000 rpm and 10,000 rpm respectively, the connection between the two was one of the main challenges of the project. Synchronization is ensured by a 1:3.6 reducer gear which uses the same drive gear as that of the F1 V8 engine.

Renault_Sport_Twizy_Rear-668

The KERS system uses a pressurized lubrication system to enable certain bearings to withstand peak revs of 36,000 rpm. Meanwhile, in order to prevent the KERS battery from overheating despite the constraints to which it is exposed, the Twizy Renault Sport F1 is equipped with water cooling. Both these systems are existing Renault Sport Technologies solutions.

This technological gem is the fruit of close collaboration between the engineers at Renaultsport, the performance arm of Renault, and their colleagues at Renault Sport F1.

This vehicle has been created to showcase Renault’s advanced expertise in electric technology employed in F1, notably in the field of KERS in which it was one of the precursors in 2009.

The Twizy Renault Sport F1 will be shown at major events throughout the year, beginning with its first public appearances at the World Series by Renault meeting at Aragon, Spain (April 27-28), followed by the Barcelona Motor Show.