Exagon Motors unveiled at the ongoing 2013 Geneva Motor Show the latest version of the capitivating electric sportscar New Exagon Furtive-eGT electric sportscar. This four-seater rear wheel drive Grand Tourer is driven by two latest-generation electric motors from Siemens Inside e-Car, mounted at the rear in an aluminum cradle and linked to the rear axle by a three-speed gearbox with seamless torque delivery.
Each unit weighs 51 kg and develops 148 kW, or 402 hp, delivering its maximum between 5,000 and 10,000 rpm in one tenth of a second, with constant torque of 516 Nm between 0 and 5,000 rpm. As a result, the Exagon Furtive-eGT electric sportscar boasts some pretty serious performance figures: it sprints from standstill to 100 km/h (62 mph) in just 3.5 seconds, reaching an electronically limited top speed of 250 km/h (155 mph).
The Exagon Furtive-eGT electric sportscar is equipped with a lithium-ion batterypackage with a capacity of 53 kWh and a total weigh of 450 kg that ensures a range of 360 km (223 miles) over an urban cycle (ECE15 standard) and 310 km (192 miles) over a combined cycle (NEDC standard). However, an optional range extender is also available in the form of a small combustion engine of low cubic capacity that recharges the battery when it reaches its range limits without driving the wheels. The range extender increases the overall range of the Furtive-eGT to 807 km (500 miles) with 25 liters of fuel over a standard ECE15 cycle, or 734 km (456 miles) over a standard combined cycle.
The monocoque body of the Exagon Furtive-eGT electric sportscar is made entirely of a carbon fibre/honeycomb structure based on Formula 1 technology and weighs only 124 kg. The body directly supports the front half-axles, optimising both weight and overall stiffness, while at the rear, a cast aluminium structure carries the powertrain and rear half-axles.
The carbon body was designed to house the battery in its structural floor. The battery position gives the car a low centre of gravity, around 110 mm lower than on a conventional sportscarcar, positioned centrally with respect to the wheels. The brake calipers, which have 6 pistons at the front and 4 at the rear, were specially developed for this model and bite vented steel discs measuring?380 mm at the front and 360 mm at the rear.
MOTORS
Motors Two Siemens Inside e-Car motors (148 kW each), liquid cooled
Power 402 hp between 5,000 and 10,000 rpm
Torque 516 N.m between 0 and 5,000 rpm
BATTERY
Battery Saft Lithium-ion with no memory effect, highly recyclable
Capacity 53 kWh
Minimum battery capacity
after 3,000 cycles (+/- 10 years) More than 80%
TRANSMISSION & SUSPENSION
Type of transmission Rear-wheel drive with self-locking differential
Gearbox ZTI three-speed semi-automatic gearbox with seamless torque delivery, developed by Exagon
Suspension Double wishbone suspension in aluminium at front and rear based on the Cobapress process
BODY & BODYWORK
Type Carbon and honeycomb monocoque weighing 124 kg Structural carbon and honeycomb floor accommodating the batteries positioned under the body
Bodywork Full carbon
Braking system Beringer brakes developed specially for the Furtive-eGT
Front brakes Vented discs (380 mm) – 6-piston callipers
Rear brakes Vented discs (360 mm) – 4-piston callipers
Deceleration 1.2 G (on a par with the world’s best)
Energy recovery On deceleration and braking
Front wheels 8.5”x 20”
Rear wheels 11”x 20”
Front tyres Michelin Pilot Super Sport 245/35 ZR20
Rear tyres Michelin Pilot Super Sport 305/30 ZR20
DIMENSIONS
Length 4,465 mm
Width 1,913 mm 2,160 mm overall (with door mirrors)
Height 1,292 mm
Wheel base 2,780 mm
Weight 1,640 kg
Boot capacity 325 litres
PERFORMANCE
Top speed Limited to 250 kph
0-100 kph 3.5 seconds
Weight/power ratio 4.08 kg/bhp
RANGE
Urban cycle (ECE15 standard) 360 km
Combined cycle (NEDC standard) 310 km
Fast charge in 32 minutes between 30% and 80%
The Exagon Furtive-eGT electric sportscar is equipped with a multimedia info-tainment system developed in partnership with Nokia that includes a 9-inch touch screen with swipe and zoom functions. The system comes with a SIM card enabling a continuous dialogue with the manufacturer, particularly for technical self-diagnosis data, emergency calls or weather bulletins. It is also equipped with a USB connection, an auxiliary socket and the Bluetooth streaming function.
