Date:21 July 2012
Nissan’s Infiniti premium brand showed off an advanced mid-engined concept car at the Geneva Show, sending a shot across the bows of the forthcoming NSX from Honda and signalling the brand’s supercar intentions.
The Emerg-E is about more than just straightline speed – although it can hit 100 km/h in 4 seconds. Built on a Lotus Evora chassis, it has a hybrid range-extender AWD powertrain.
It’s the company’s first midships design and the first Infiniti developed in Europe. As part of the UK Government’s Technology Strategy Board consortium, whose aim is to fasttrack low carbon vehicles, Nissan discovered that fellow consortium members Lotus Engineering were developing a range-extender electric sports car, leading logically to the idea of collaborating. A key feature of the Emerg-E is that it contains a blend of technologies and solutions that have not previously been tried – as required by the consortium.
With twin 150 kW electric motors driving the rear wheels via an Xtrac transmission, the Emerg-E is capable of supercar
performance, but when necessary it can turn into the mildmannered Clark Kent of high performance cars by providing
zero-emission urban transport over a 50-km range. Using the range-extender petrol engine in concert with the car’s twin
electric motors, produces a CO2 output of only 55g/km.
The significant components of the powertrain are a pair of electric motors, a lithium-ion battery pack, four inverters, a
three-cylinder range-extending internal combustion engine and a petrol tank.
Four inverters control the motors and their energy regeneration role under braking, the recovered power directed to a
lithium-ion battery mounted behind the seats. The battery can be recharged from a mains power supply (domestic and
The petrol engine that acts as a generator, an ultra-compact 35 kW Lotus three-cylinder 1,2 litre, has been purpose-designed for its range-extending role. It operates between crank speeds of 1 500 and 4 000 r/min.
Electric motor Synchronous, twin rotor motors, one per rear wheel, EVO electric synchronous DC brushless drive
Power 150 kW per motor (300 kW total for vehicle) available for 30 s or less. Flat distribution of power circa 3 000 r/min upwards
Torque 1 000 N.m
Range extender engine Lotus 3-cylinder, 1,2-litre
Power 35 kW at 3500 r/min
Torque 107 N.m at 2500 r/min
Transmission Xtrac single-speed (4,588:1 reduction box)
Battery type L ithium-ion phosphate
Battery capacity 1 000 A
Peak power 300 kW
Wallpaper: See New on the block (July 2012 issue) for wallpaper images of the Nissan Infiniti Emerg-E