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How to reduce the energy needs of electrical and conventional vehicles

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Abstract

Rolling losses get more important than drag losses around cities with low speed and traffic jam. The weight of cars did increase a lot in the last 50 years, but the tendency is down again. The consumption of auxiliaries did increase also but LEDs, improved fans, could reverse the tendency. Knowing the details of rolling, drag, acceleration, altitude change and auxiliaries, the mechanical needs get predictable for electric cars. Knowing all this, with a conventional car, while using 19 tricks, the NEDC listed consumption can be reached in practice. Electric vehicles of less than 150 kg for two persons may be the solution for the future.
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Electric vehicles are fundamental components of the sustainable mobility our world needs. Unless a major technological breakthrough is achieved, its future will pass by multiple energy sources hybridization, in order to benefit from the best qualities of the energy sources available. In this paper, the energy and mobility problem is introduced as well as the relevance of electric vehicles to advanced and sustainable transportation. The energy storage issue is addressed together with the need for multiple energy sources hybridization. Finally, some simulation results of multiple energy sources hybridization for the ISEC VEIL project are presented and its advantages are clearly shown.
Conference Paper
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Electrical vehicles are seriously considered today. However their energy needs depend seriously on the way how they are designed, ranging from electric bicycles to the electrical utility vehicle, it can differ from 1kWh to more than 20kWh/100km. One can look at the problem if it is better to use compressed natural gas in a vehicle directly or is it better to make electricity first and use that electricity in an electric vehicle. A special attention is given to the development of ultra-light electric cars “Ecologic Low Budget Electric Vehicle” ELBEV. It permits to cut down the energy consumption down to 2-3kWh/100km, especially suited for single person daily commuting needs.
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