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Two-Mode Urban Transit Hybrid Bus In-Use Fuel Economy Results from 20 Million Fleet Miles
Technical Paper
2007-01-0272
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The General Motors Allison Two-Mode compound split parallel hybrid EP system for transit buses has been in production for over three years, accumulating over 20 million fleet miles. During this period of operation, extensive fuel economy analysis has been performed over multiple use cycles in multiple locations. This paper describes the in-use fuel economy results, as well as the hybrid system mode operations, the component utilization, and the controls improvements to maximize the hybrid fuel economy. Actual in-use data will be presented from individual vehicles, as well as the fleet averages encompassing a broad range of duty cycles. A chassis dynamometer testing results are discussed as an alternative evaluation method.
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Authors
Citation
Chiang, P., "Two-Mode Urban Transit Hybrid Bus In-Use Fuel Economy Results from 20 Million Fleet Miles," SAE Technical Paper 2007-01-0272, 2007, https://doi.org/10.4271/2007-01-0272.Also In
References
- Schmidt, M. R. 1999 “Two-Mode Compound Split Electrical-Mechanical Vehicular Transmission,”
- National Renewable Energy Laboratory (NREL) King County Metro Transit Hybrid Articulated Buses: Final Evaluation Results Report Number NREL/TP-540-40585
- Environment Research and Measurement Division of Canada (ERMD) “Allison E P System Electric Hybrid Test Program, Regulated Emissions and Fuel Economy Results, Cummins ISB 5.9L Bus Configuration” ERMD Report number 05-24-02
- Environment Research and Measurement Division of Canada (ERMD) “Allison E P System Electric Hybrid Test Program, Regulated Emissions and Fuel Economy Results, Cummins ISL 8.9L Bus Configuration” ERMD Report number. 05-24-01
- Environment Research and Measurement Division of Canada (ERMD) “Regulated Emissions and Fuel Economy Results of a Conventional Urban Bus, Cummins ISL 8.9L Bus Configuration” ERMD Report number 05-24-03
- SAE J2711 Recommended Practice for Measuring Fuel Economy and Emissions of Hybrid-Electric and Conventional Heavy-Duty Vehicles
- National Research Council Canada Hybrid Diesel Electric Bus Technology and Feasibility Study Report Number: CSTT-HVC-TR-093