United States Department of Transportation
i
A High Performance Auxiliary Power Unit for a Series Hybrid Electric Vehicle
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2000-11-01
[PDF-201.83 KB]
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Abstract:It is becoming obvious that the current rate of energy consumption by automobiles will not be sustainable indefinitely, and the present rate of pollution formation is changing the Earth?s environment. One way of reducing the energy consumed by automobiles is to use more energy-efficient propulsion systems. Current technology has been applied to create more energy efficient vehicle propulsion systems by combining an internal combustion (IC) engine and an electric propulsion system into a single system that is more efficient than conventional vehicles using an IC engine alone. A vehicle that combines an IC engine and an electric propulsion system is commonly called a Hybrid Electric Vehicle (HEV). Series HEVs only have an electric propulsion system coupled to the wheels. Power for the electric propulsion system comes from the battery pack and/or the auxiliary power unit (APU). The APU generates electrical power that is used by the electric propulsion system during extended range operation. For short-range operation, which is typical of most daily driving conditions, a series HEV can be completely powered by the battery pack and operate as a zero tailpipe emission vehicle (ZEV). Typically, the energy for recharging the battery pack comes from electricity supplied by the grid. (50 p.)
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