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Fuel Economy Improvement via Hybridization vs. Vehicle Performance Level
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 03, 2002 by SAE International in United States
Annotation ability available
Event: Future Car Congress
Although many of the studies that use vehicle simulation models to estimate fuel economy gains for a range of hybrid vehicles have attempted to control for the comparability of performance between conventional and hybrid vehicles, different rules and simulation models have been used. This paper reviews the estimates of city, highway, and corporate average fuel economy gain vs. varying measures of performance change for a set of those studies. We examine the causes for the wide range in estimates when hybridizing a vehicle, establish a database, and provide detailed discussions of relationships using several of the studies. Statistical models developed on the basis of the data reveal the causes of variation in mpg gain among conventional/hybrid pairs that have the same 0-60 mph acceleration times. Our study reveals that potential mpg gain via hybridization is greater as the 0-60 mph acceleration time of the pair of compared vehicles drops (and power-to-weight ratios increase). We demonstrate that engine downsizing is necessary to obtain large benefits, and that an increase in electric motor power relative to engine power - up to a point - improves the fuel economy of hybrids.
- D. J. Santini - Center for Transportation Research, Energy Systems Division Transportation Technology Research and Development Center Argonne National Laboratory
- A. D. Vyas - Center for Transportation Research, Energy Systems Division Transportation Technology Research and Development Center Argonne National Laboratory
- J. L. Anderson - Center for Transportation Research, Energy Systems Division Transportation Technology Research and Development Center Argonne National Laboratory
CitationSantini, D., Vyas, A., and Anderson, J., "Fuel Economy Improvement via Hybridization vs. Vehicle Performance Level," SAE Technical Paper 2002-01-1901, 2002, https://doi.org/10.4271/2002-01-1901.
- Partnership for a New Generation of Vehicles, 2001, Review of Technical Progress of Goal 2 Research, Southfield, Mich., May 10.
- Graham, R., et al., 2001, Comparing the Benefits and Impacts of Hybrid Electric Vehicle Options, Final Report, July 2000, Electric Power Research Institute, Palo Alto, Calif.
- Plotkin, S., et al., 2001, Hybrid Vehicle Technology Assessment: Methodology, Analytical Issues, and Interim Results, Argonne National Laboratory Report ANL/ESD/02-2, Argonne, Ill.
- Santini, D., Vyas A, Anderson J.L., and An F., 2001, “Estimating Trade-Offs Along the Path to the PNGV 3X Goal,” Transportation Research Board 80th Annual Meeting, Paper 01-3222, Transportation Research Board, Washington, D.C., Jan. 7-11.
- An, F., Stodolsky F., and Santini D., 1999, “Hybrid Options for Light Duty Vehicles,” SAE paper 1999-01-2929, reprinted from Electric and Hybrid Electric Vehicles and Fuel Cell Technology (SAE SP-1466). Society of Automotive Engineers, Warrendale, Penn., 1999, presented at the Future Transportation Technology Conference, Costa Mesa, Calif., Aug. 1999.
- Weiss, M.A., et al., 2000, On the Road in 2020: A Life-Cycle Analysis of New Automobile Technologies, MIT Energy Laboratory Report # MIT EL 00-003, Energy Laboratory, Massachusetts Institute of Technology, Cambridge, Mass., Oct.
- Lave, L.B., and MacLean H.L., 2001, “Are Hybrid Vehicles Worth It?” IEEE Spectrum, March, pp. 47-50.
- Wipke, K., Cuddy M., Bharathan D., Burch S., Johnson V., Markel T., Sprik S., 1998, “ADVISOR 2.0: A Second-Generation Advanced Vehicle Simulator for Systems Analysis,” Proceedings from North American EV & Infrastructure Conference and Exposition, Dec. 3-4, Phoenix, Ariz. (Available at http.//www.ctts.nrel.gov/analysis/reading_room.html)
- Wipke, K., Cuddy M., Burch S., 1999, “ADVISOR 2.1: A User-Friendly Advanced Powertrain Simulation Using a Combined Backward/Forward Approach,” IEEE Transactions on Vehicular Technology, Special Issue on Hybrid and Electric Vehicles, Columbus, Ohio, Aug.
- Santini, D.J., et al., 2002, “Hybridizing with Engine Downsizing” paper number 02-4095, Annual Meeting of the Transportation Research Board, Washington, D.C., Jan. 6-10
- Thomas, C.E., 1999, PNGV-Class Vehicle Analysis: Task 3 Final Report, Directed Technologies Report for the National Renewable Energy Laboratory, Subcontract No. ACG-8-18012-01, June.
- Thomas, C.E., et al., 1998, Integrated Analysis of Hydrogen Passenger Vehicle Transportation Pathways, Directed Technologies Draft Final Report for the National Renewable Energy Laboratory, Subcontract No. AXE-6-16685-01, March.
- General Motors Corp., et al., 2001, Well-to-Wheel Energy Use and Greenhouse Gas Emissions of Advanced Fuel/Vehicle Systems: North American Analysis - Executive Summary Report. (Available electronically at Argonne National Laboratory's Transportation Technology Research and Development Center web site, www.transportation.anl.gov/. Document address, www.tis.anl.gov:8000/db1/ttrdc/document/DDD/126.PDF )
- Plotkin, et al., 2001, Observations from a DOE HEV Technology Assessment presentation to the California Air Resources Board Zero Emissions Vehicle Workshop. University of California at Davis, Davis, Calif., May 15-16.
- DOE, 1996, Model Year 1997 Fuel Economy Guide, U.S. Department of Energy Report DOE/EE-0102, Washington, DC.
- Wang, M.Q., 2001, “Fuel Choices for Fuel Cell Vehicles: Well-to-Wheel Energy and Emissions Impacts,” Future Car Congress 2002: Arlington, Va. June 3-5.