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Electric Vehicles Research
Posted on April 22, 2011 by  & 

More on 2nd vs 3rd Generation Range Extenders

There is no doubt that hybrid electric vehicles by land sea and air are transitioning from having small traction batteries and near useless all electric range of about 15 miles to something nearer to market needs. In prospect is all-electric plug-in range as good or better than today's affordable pure electric land, sea and air vehicles at 100 miles or so (162 km) and use of on-board range extenders that give a total plug-in powered plus on-board energy range that even exceeds that of most of today's conventional vehicles. Think over 1000 miles. However, there are two approaches to this. One is to give the conventional internal combustion engine one last gasp - call it Second Generation. For example, Fisker, which hopes to sell up to eight thousand of its designer hybrid sports cars this year, once it starts production, seeks to move to smaller engines - still conventional - for next model. That may mean a 1.2 liter 3-cylinder range-extender IC engine.
The company's next model, the "Nina" compact PHEV luxury vehicle, will probably employ the same GM-sourced 2.0L EcoTec turbo 4-cylinder engine as the Karma, but the models that come after that may have a lighter 3- or 4-cylinder motor. One name being mentioned is a new 1.2 liter 3-cylinder range-extender internal combustion engine from Lotus Engineering that the British company intends to produce in Spain with the Fagor Ederlan Group. According to, this set-up could come in significantly lighter than the 360-lb GM motor currently being used, adding range to the vehicle.
Another example of offering sleeker conventional engines in hybrids - engines specially designed for fairly constant torque and revs and best economy, is the DLR German Aerospace Center flat in-line simplified ICE being designed specifically for hybrids as a competitor for the Lotus monoblock design. However, all this flies in the face of third generation ie non-ICE range extenders. These are being deployed all over the place already. Intelligent Energy Fuel cells are in Suzuki motorcycles and fuel cells are experimentally or in full use in Ground Support Equipment GSE at airports (DLR German Aerospace Center), taxis, Unmanned Aerial Vehicles UAVs, buses (all Intelligent Energy), Autonomous Underwater Vehicles AUVs, in cars (Mercedes near to offering one model for open sale) and elsewhere.
Source: DesignLine
Fuel cells are not the only genuinely third generation range extender technology. Consider the unrivalled reliability of the jet engine. As an alternative to fuel cells, the turbine range extender is also widely deployed already. The precursor of the Bladon Jets mini turbine range extender in the planned Tata Motors Europe Jaguar supercar is the DesignLine of New Zealand hybrid bus seen across the UK, Europe, New York and elsewhere with their larger Capstone turbine range extenders adapted from other uses.
The question therefore arises whether the interim second generation specially designed ICEs for hybrids are not being overtaken by events. True, the successors - fuel cell range extenders and mini turbine range extenders - have their own problems but they promise to be quieter, smaller, with less to go wrong and with independence from oil supplied by unsafe and increasingly expensive sources. Indeed, the mini turbines can use a huge variety of fuels. The Bladon Jets mini turbine has only one moving part, the shaft + blades made in one piece: it is as simple and reliable as an electric motor. AUVs cannot use ICE underwater and they need up to a massive 400 kWh storage - or a fuel cell range extender as deployed by JAMSTEC in Japan. EADS, ENFICA-FC and other advancing the cause of electric aircraft are interested in both options. ENFICA-FC in Italy has even flown a fuel cell range extended two seat aircraft recently. It is shown above.
Source: Bladon Jets
Ten meter long JAMSTEC Urashima Fuel cell AUV "FCUV" in Japan
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Posted on: April 22, 2011

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