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“The Influence of Idle, Drive Cycle and Accessories on the Fuel Economy of Urban Hybrid Electric Buses - Chassis Dynamometer Tests”
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 10, 2003 by SAE International in United States
Annotation ability available
Fuel economy can be part of a business case for a fleet making the decision to buy new HD hybrid drivetrain technologies. Chassis dynamometer tests using SAE Recommended Practice J2711 on a bus equipped with an Allison EP SYSTEM ™ hybrid system and operated on standard bus driving cycles have produced impressive gains of over 60%. Preliminary urban bus field tests, on the other hand, have shown lower fuel economy gains. The difference can be attributed, in part, to the use of accessories - most importantly air conditioning - which are parasitic loads on the vehicle. In this paper the characteristics of driving cycles are studied to determine those factors which have the strongest influence on fuel economy for hybrids. The data show that the number of stopping events in a route or cycle is a strong influence as is the average vehicle speed. Energy analysis will show the relationship of fuel economy benefit and battery energy within a driving cycle. Transit managers can use this information to get the most from the hybrid vehicles in their fleet by assigning them to the most effective routes.
CitationBass, E. and Alfermann, T., "“The Influence of Idle, Drive Cycle and Accessories on the Fuel Economy of Urban Hybrid Electric Buses - Chassis Dynamometer Tests”," SAE Technical Paper 2003-01-3438, 2003, https://doi.org/10.4271/2003-01-3438.
- SAE J2711 “Recommended Practice for Measuring Fuel Economy and Emissions of Heavy Duty Hybrid-Electric and Conventional Heavy-duty Vehicles” September 2002
- McKain, David L. Clark, Nigel N. Balon, Thomas H. Moynihan, Paul J. Lynch, Sheila A. Webb, Thomas C. “Characterization of Emissions from Hybrid and Conventional Transit Buses,” SAE paper 2000-01-2011 West Virginia University New York City
- United States Code of Federal Regulations
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- “Hybrid-Electric Drives Heavy-Duty Vehicle Testing Project, Final Emissions Report” Northeast Advanced Vehicle Consortium M.J. Bradley & Associates, Inc. West Virginia University February 15 2000
- Environment Canada Emissions Research and Measurement Division Report No. 02-25-3