With its electric drivetrain and innovative solutions, the Furtive-eGT
rewrites the ground rules for contemporary GT sports cars. Not in
terms of performance alone, but in terms of the new driving
sensations delivered by a grand tourer designed as an electric
vehicle from A to Z.
An exceptional electric GT sports
car
Exagon Motors set out to
develop an exceptional electric sports car that would combine the
best of their experience in electric motorsports (Electric Andros
Trophy) with today�s cutting-edge technologies. The specifications
drafted by Luc Marchetti, CEO of Exagon Motors, established clear
objectives: the Furtive-eGT had to combine exceptional performance
with real day-to-day driveability. To achieve this versatility,
Exagon worked with a number of leading European partners who brought
their expertise to the project from the outset: Siemens, Saft,
Michelin and Nokia. The result: the most exciting GT sports car
around.
Original technologies and leading
partners
The Furtive-eGT combines
an impressive sum of human expertise with technologies never before
seen in cars. It is an innovator in all areas, from its
latest-generation Siemens motors and Saft batteries to its carbon
body, running gear developed with Michelin, three-speed gearbox with
seamless torque delivery, acoustics by Focal and man/machine
multimedia interface. The Furtive-eGT embodies a unique blend of
expertise. No comparisons can be made with the existing market
offering.
A GT made for the era of
sustainable development
The Furtive-eGT is very
much a car of its times, the era of digital cars and sustainable
development, but it also reflects a long tradition in exceptional
GTs. This long-haul traveller is a true 2+2, designed to comfortably
seat four passengers with their luggage. The Furtive-eGT is designed
as a versatile car, combining the ride and performance of a quality
sports model with the comfort of a grand tourer.
A new sensory experience
The electric drivetrain
delivers original driving sensations with the torque coming in
immediately. With constant torque of 516 N.m between 0 and 5,000
rpm, the Furtive-eGT is capable of phenomenal acceleration,
sprinting from 0 to 100 km in just 3.5 s, with a top speed limited
to 250 kph. As well as savouring the silence of this impressive
performance, owners can take pleasure in owning a car with zero
carbon emissions. Looking beyond figures, this is an experience that
everybody should enjoy at least once in their lives.
French spirit and style
Designed by Exagon
MotorsTM, the Furtive-eGT is a car of classic, timeless beauty. It
embodies a truly French approach to modern, prestige vehicles, far
removed from passing trends and fashions. The Furtive-eGT is 4.46 m
long with very short front and rear overhangs. The design is elegant
and dynamic, while placing the emphasis squarely on aerodynamics. A
car of pure, clean lines, the Furtive-eGT stands out from the crowd
with distinctive features, such as the double-bubble roof, headlight
signature and rear wings to optimise downforce.
2. Siemens electric motors
The Furtive-eGT is
driven by two latest-generation electric motors from Siemens Inside
e-Car. Installed centrally on an aluminium cradle at the rear, and
linked by the three-speed gearbox with seamless torque delivery,
they drive the rear wheels of the Furtive-eGT (rear-wheel drive).
From the driver�s standpoint, the two motors act as one even though
the electronic controls allow them to operate separately. The two
motors are liquid-cooled to maintain performance levels in all
conditions of use.
These electric motors are among the most compact on the market. They each develop 148 kW � or 296 kW overall � a level of power equivalent to 402 bhp, for an outstanding level of efficiency. Maximum power of between 5,000 and 10,000 rpm is available in one-tenth of a second, with constant torque of 516 N.m (258 N.m x 2) between 0 and 5,000 rpm.
These electric motors are among the most compact on the market. They each develop 148 kW � or 296 kW overall � a level of power equivalent to 402 bhp, for an outstanding level of efficiency. Maximum power of between 5,000 and 10,000 rpm is available in one-tenth of a second, with constant torque of 516 N.m (258 N.m x 2) between 0 and 5,000 rpm.
These motors, developed
specially by Siemens for the needs of the Furtive-eGT, each weigh 51
kg. Viewed against their individual rated power of 148 kW, this
gives them energy density of 2.901 kW/kg, an excellent figure, with
efficiency close to 98%. Two inverters, also developed specially for
the Furtive-eGT, distribute electric power by converting the direct
current from the Saft battery into alternating current. The
inverters drive the motors in two modes, based on torque or engine
speed, modifying amplitude and frequency as necessary. The
�supervisor� control electronics were developed internally by
Exagon.
Supercar performance
Accelerating from 0 to
100 kph in just 3.5 seconds, the Furtive-eGT ranks among the best
supercars on the market. The response time between pedal depression
and the delivery of power is just one-tenth of a second. The Siemens
motors use this power for a level of acceleration never before
enjoyed by drivers. The top speed is limited electronically to 250
kph.
On deceleration, the
magnetic field of the electric motors contributes to the car�s
exceptional braking properties, with each motor acting as a
generator to recharge the batteries and thus increase vehicle range.
Together, the motor brakes and callipers developed for the Furtive-eGT
by BERINGER develop up to 1.2 G during the braking phase, slashing
stopping distances and making this one of the world�s best braking
systems.
Maintenance and environmental
protection
The Siemens Inside e-Car
electric motors have few moving parts and deliver a level of
reliability far beyond that of combustion engines. No upkeep is
required before 150,000 kilometres, which makes them virtually
maintenance free. They are silent by definition, emitting no carbon
or NOx.
3. Saft batteries
The Furtive-eGT is
equipped with batteries made by Saft, world leader in lithium-ion
batteries. The company holds market share of 80% in the aerospace
industry as well as in the defence industry and in Formula 1,
reflecting the quality and advanced technology of the components
used, and the high safety standards in all circumstances. These
latest-generation batteries have a capacity of 53 kWh and a rated
voltage of 360 V. They weigh 480 kg overall.
Exagon Motors turned the
constraint of battery weight into an advantage. The architecture of
the carbon body made it possible to install the batteries in the
floor of the Furtive-eGT. This lowers the centre of gravity (110 mm
lower than on a conventional GT) to virtually eliminate roll on
cornering, for exceptional ride and handling. This feature makes a
key contribution to roadholding and thus to the driving sensations
delivered by the Furtive-eGT.
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