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Operating Envelopes of Hybrid Bus Engines
Technical Paper
2001-01-3537
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
Spring Fuels & Lubricants Meeting & Exhibition
SAE International Fall Fuels & Lubricants Meeting & Exhibition
Language:
English
Abstract
Recent chassis testing of hybrid buses demonstrated the potential of hybrid technology to reduce emissions and raise fuel economy relative to conventional buses. However, hybrid buses represent a certification quandary because the engines must be certified using the accepted Federal Test Procedure (FTP), without regard for benefits that may arise from less transient engine operation. Actual engine operating data from series configuration hybrid buses were analyzed to determine the envelopes of torque and speeds covered by the engine. Transient engine operation was also considered in terms of rates of change of torque, power and speed. These measures did not compare closely with similar measures computed from the FTP because the series hybrid engines explored a more structured zone of operation than the FTP implied and because the FTP represented more transient operation. A modal data analysis revealed that the Euro III 13 mode steady state test was the most inclusive and representative cycle for the heavy -duty hybrid vehicle engines evaluated for this study.
Authors
- Nigel Clark - Dept. of Mech. and Aerospace Eng. West Virginia Univ.
- Akunor Azu - Dept. of Mech. and Aerospace Eng. West Virginia Univ.
- Ronald Jarrett - Dept. of Mech. and Aerospace Eng. West Virginia Univ.
- Thomas Balon - M.J. Bradley & Associates
- Paul Moynihan - M.J. Bradley & Associates
- Sheila Lynch - Northeast Advanced Vehicle Consortium
- Thomas Webb - Northeast Advanced Vehicle Consortium
Citation
Clark, N., Azu, A., Jarrett, R., Balon, T. et al., "Operating Envelopes of Hybrid Bus Engines," SAE Technical Paper 2001-01-3537, 2001, https://doi.org/10.4271/2001-01-3537.Also In
References
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- Code of Federal Regulations U.S. Government Printing Office Washington D.C. 1996
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