Nissan unveils pure EV sports car ‘ESFLOW concept’ at 2011 Geneva Motor Show

Article by Christian A., on March 2, 2011

At Nissan’s stand in the Geneva Motor Show, there is only one non-production vehicle that was displayed – the ESFLOW concept. Making its world debut, the ESFLOW comes as a pure EV sports car. The model on display takes inspiration from glaciers. Actually Nissan describes it as “highly reflective solidified liquid with blue tints in its shadows.”

Nissan tinted the vehicle’s headlights and Nissan emblem cool blue. In addition, the six spoke wheels contain blue carbon inserts. The same material was used on the side sill, roof mounted lip spoiler and lower rear bumper. Blue LEDs highlight the futuristic lights slashed into the bodywork both front and rear.

The interior, which is said to be both luxurious and eco-friendly, has highlights that include the steel framed, thickly upholstered and increasingly motorized seats. Adjustments are made electrically by the fly-by-wire steering and pedals so as to best suit the driver’s size and preferred driving position.

It also features gold leather upholstery and perforated gold suede on the seats. The doors are trimmed in dark blue leather and suede. The dashboard also features this blue and gold motif (the color of sparks).

It has silver carbon trim, and it features four multifunction illuminated LCD displays. In terms of performance, the vehicle is rear-wheel drive and it is equipped with two electric motors that are positioned above the axis of the rear wheels, in a mid-ship position.

Lithium-ion battery packs, the same as those used in the Nissan LEAF, power the ESFLOW. These battery packs give the car enough power for it to run over 240 km (150 miles) on a single charge.

Powertrain

The rear-wheel-drive Nissan ESFLOW Concept is propelled by twin electric motors located above the axis of the rear wheels, putting them in a mid-ship position. These electric motors independently control the left and right wheels, allowing torque to be optimized for superior stability and control and for efficient power regeneration.

In terms of power, these motors are powerful enough to accelerate the Nissan ESFLOW Concept from zero to 100kph in under 5 seconds. The motors are powered by electricity coming from a laminated lithium-ion battery pack that is featured in the Nissan LEAF.

However, these battery packs on the Nissan ESFLOW Concept are placed along the axis of the front and rear wheels, thereby centralizing the vehicle mass of the car and making its rotation point close to the driver's hips. These batteries are dense enough to allow the Nissan ESFLOW Concept cover over 240km on one charge. Another thing that defines the Nissan ESFLOW Concept is its aluminum chassis built around the drive train.

Power cells of the batteries are integrated in a manner that would further improve the concept’s strength and poise, instead of decreasing them. Since these batteries do not get lighter or heavier while supplying energy, the concept’s weight distribution remains the same during a trip.

The Nissan ESFLOW Concept features classic sports car proportions, resulting to a high waistline that allows for strong and unobtrusive roll bars – integrated into the structure just behind the seats -- to safely shoulder the entire vehicle load in case of a roll over.

This eliminates the need for thick, obtrusive and reinforced A-pillars, which usually create some blind spots. This is a view similar to what fighter pilots experience when flying their jets. Just as these pilots feel the planes as if these are strapped on to their backs, ESFLOW drivers will also feel the car as an extension of their bodies. The ESFLOW places the driver at its center both literally and metaphorically.

Press Release

Nissan Esflow Concept

It may be a concept, but the Nissan ESFLOW electric sports car proves it's possible to remain environmentally sympathetic without having to give up the joy of driving.

It looks like a sports car, handles like a sports car and performs like one too. But Nissan ESFLOW Concept is different to every other sports car yet built: it's electric. Using technology pioneered in the award-winning Nissan LEAF, the EV concept shows that driving can still be as much fun tomorrow as it is today.

Nissan has a reputation for creating some of the most exhilarating sports cars on the market. Nissan has also developed the world's first practical Zero Emission family car, the Nissan LEAF.

Now Nissan has put that expertise together. It has captured the excitement of a sports car and the environmental benefits of an electric vehicle and blended them into one dramatic two-seater concept: ESFLOW.

Nissan ESFLOW Concept has been created from the ground up as a pure electric vehicle, to give an idea how a Zero Emission sports car of the future might look. Living ecologically has often been seen as an act of austerity - to save one's environmental conscience sacrifices must be made. ESFLOW is here to address that misconception.

Owning an ecologically sound car does not have to come at the expense of driving enjoyment. The briefest glance at the Nissan ESFLOW Concept is enough to tell you what kind of car it is: a long bonnet leading into a steeply raked, wrap around windscreen, the compact cabin placing the occupants bang on the car's centre of gravity, hunched arches over ultra-low profile tyres wrapped around six spoke wheels. ESFLOW is unmistakably a sports car, and those in the know will recognize its heritage - hints of classic and contemporary Nissan sports cars abound.

Vitally, ESFLOW is not an existing ICE (internal combustion engine) powered vehicle that has been adapted to run on electricity, but a sports car that's been designed from the outset as a Zero Emission vehicle. This means that Nissan's forward thinking designers have had free rein to place the power train and batteries in the optimum positions to benefit the car's handling and performance and enhancing the thrill of driving.

The Car

The Nissan ESFLOW Concept is based on existing technology, implemented in innovative ways. An attractive, head turning composite body covers an aluminium chassis, incorporating its own roll cage. The powertrain unit, which employs the same technologies installed in the Nissan LEAF, is tuned to offer a sporty driving experience.

The Powertrain

Nissan ESFLOW Concept is rear-wheel drive and it runs on two motors. The car's graceful proportions allow the twin electric motors to be placed above the axis of the rear wheels, in a mid-ship position,. These motors independently control the left and right wheels, and so the torque is optimized to ensure outstanding vehicle stability and control as well as efficient power regeneration. The motors produce enough torque in an instant for it to reach a 100kph in under 5 seconds.

Power for the motors comes from the same laminated lithium-ion battery packs used in the Nissan LEAF, but in ESFLOW the packs are located along the axis of the front and rear wheels. This centralizes the mass of the car, and thus its rotation point, close to the driver's hips. These cleverly positioned batteries enable the car to travel over 240km on one charge.

The Chassis

An aluminium chassis has been built around the drive train, taking full advantage of the opportunities that Zero Emission electric propulsion provides. Power cells are incorporated in such a way that they benefit ESFLOW's strength and poise, not detract from them. Indeed, unlike a conventional fuel tank, batteries do not get lighter as they provide energy, so the car's weight distribution remains constant throughout a drive.

The high waistline afforded by the Nissan ESFLOW Concept's classic sports car proportions allows strong, yet unobtrusive roll bars incorporated in to the structure behind the seats to safely take the entire load of the car in the event of a roll over, negating the need for obtrusive, thick, reinforced A-pillars and the blind spots they inevitably create.

This almost unobstructed view ahead will not be unfamiliar to fighter pilots, and just as such pilots speak of "strapping their planes on to their backs", we hope ESFLOW owners will also feel the car to be an extension of their bodies, reacting to their slightest whims. The driver must be at the centre of the sports car both physically and metaphorically.

The Body

The Nissan ESFLOW Concept is undoubtedly an attractive car. Crisp, clean lines not only convey the purity of its sporting potential, but suggest the clarity of electric power. The colour scheme chosen for the concept car is inspired by glaciers - highly reflective solidified liquid with blue tints in its shadows. Like its ZEV concept forebears and contemporary stable mate the ESFLOW's headlights and Nissan emblem are tinted cool blue. The six spoke wheels contain blue carbon inserts while the same material adorns the side sill, roof mounted lip spoiler and lower rear bumper.

Blue LEDs accentuate the futuristic lights slashed into the bodywork both front and rear. Where the Nissan LEAF's protrusive headlights are used to guide airflow around the door mirrors, this is not needed on Nissan ESFLOW Concept as the mirrors have been replaced with minute rear view cameras at the base of its A-pillars. The ESFLOW's front lights do protect a secret of their own however: flip out charging points built in to the air ducts beneath.

The Interior

Ecological minimalism need not come at the expense of luxury. The cabin of the Nissan ESFLOW Concept is clean and open and weight saving has been a priority throughout its design, but it is still a comfortable and pleasant place to sit. By far the heaviest components in modern cars' interiors are the steel framed, thickly upholstered and increasingly motorized seats. In ESFLOW the seats are sculpted into the rear bulkhead of the car, negating the need for a heavy frame. This of course means that they are immobile, but this is of no consequence as the fly-by-wire steering and pedals adjust electrically to the best spot to suit each individual driver's size and preferred driving position.

The seats themselves are upholstered in gold leather and perforated gold suede while the doors are trimmed in dark blue leather and suede. The blue and gold motif, the colour of sparks, is continued across the dashboard, which is also adorned with silver carbon trim, and features four multifunction illuminated LCD displays.

The Driver

Daniel, an ESFLOW owner, works in tech, but lives for the weekend. On Friday night after work, he gets behind the wheels of his ESFLOW which instantly links with his pocket PDA and determines the fastest route to his girlfriend's home. Finding street side parking is a synch as the Nissan ESFLOW Concept's compact dimensions allow it to slip in to the narrowest of spaces. On Saturday he drives to a popular club to exhibit his DJ skills and his friends are impressed by his cool EV sports car.

On Sunday he drives through the mountains for leisure. ESFLOW's superb weight distribution and unobstructed view ahead enables him to effortlessly nail every apex, every time. His descent from the mountains is more relaxed and he allows the ESFLOW to overrun on the long sweeping curves, turning the potential energy he and the car gained climbing up the gradients back in to electrical energy he can use once he hits the roads around Barcelona.

As his ESFLOW sips energy in its garage Daniel prepares himself for the week ahead, batteries fully recharged.

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