AndyH
Well-known member
http://www.sae.org/mags/AEI/8934
Range extended EV Jag uses four in-wheel motors for pure EV drive
19KWh battery
~70 mile range
0-62mph in 3.4 seconds
More at the link.
Range extended EV Jag uses four in-wheel motors for pure EV drive
19KWh battery
~70 mile range
0-62mph in 3.4 seconds
Most electric vehicles and concepts displayed at the 2010 Paris Motor Show were based around low-production-cost models, which means a single drive motor. For its C-X75 concept, Jaguar took a far more experimental approach. The car is based around a two-seat high-performance coupe built using Jaguar’s aluminum spaceframe construction. The drive system is based around a range-extender plug-in hybrid-electric architecture. The electric drive system uses wheel motors in each wheel to give four-wheel drive with torque-vectoring capability.
“Having it as a pure EV, we don’t think is viable because you’d have to stack the car from front to back with batteries,” Tony Harper, head of research and advanced system engineering at Jaguar told AEI. “Even then, you wouldn’t get much more than a 200 mi range and certainly not if you tried to drive it as a supercar. So we looked to size the battery at about a 70-mi range, which covers what most people do with a car most of the time. In capacity terms, it’s about a 19-kW·h battery.
“But we want this to be a supercar both in terms of its performance and its range," Harper continued. "To make that happen, you essentially need a power extender and a range extender that is very power dense. You could use a reciprocating engine or a rotary engine in this solution, but what you don’t want to do is compromise what most people are doing most of the time, which is driving this car as an EV. With either of those solutions you’d be carrying a lot of weight and package around when you don’t use it. In fact you’d be penalized for lugging that capability around. So that drove us to looking for lightweight, power-dense range extension and power extension solutions and that takes you fairly quickly to gas turbines.”
So the C-X75 is equipped with two micro gas turbines producing 94 hp (70 kW) at 80,000 rpm and supplied by Bladon Jets, a company in which Jaguar Land Rover’s owner Tata took a minority shareholding during the Paris Show. Each turbine, combined with the switch reluctance generator, weighs 35 kg (77 lb) each.
More at the link.
