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A Comparison of HEV Engine Operation and HD Engine Emissions Test Cycles
Technical Paper
2000-01-3469
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Currently, all heavy-duty on-road engines in the USA are certified for emissions compliance using the Federal Test Procedure (FTP) heavy-duty transient cycle. The engine in a hybrid drive system, on the other hand, is controlled at a more steady-state level to reduce emissions over conventional drive systems. In this study, Allison Electric Drive seeks a better standardized emissions test cycle to certify (in the near term) engines which will be used in parallel and series hybrid drive systems. Actual revenue service data from a transit hybrid electric vehicle (HEV) was compared to several standard engine test cycles including the US FTP, ISO 8178 (a collection of many steady-state cycles), the Euro III (ESC) 13-mode cycle, and the Japanese 13-mode cycle. Graphical analysis of actual hybrid engine data revealed that the ESC cycle reflects field data better than other cycles, including the US FTP, which has little correlation. Transient analysis of FTP verses HEV showed that the former has two times the average and four times the maximum rate of change of percent torque compared to the HEV. This result supports the consideration of a steady state engine emissions test cycle.
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Bass, E., Johnson, J., and Wildemann, P., "A Comparison of HEV Engine Operation and HD Engine Emissions Test Cycles," SAE Technical Paper 2000-01-3469, 2000, https://doi.org/10.4271/2000-01-3469.Also In
References
- Hybrid Electric Drive Heavy Duty Vehicle Test Project Final Emissions Report NAVC Bradley M.J. West Virginia University February 15 2000 http://www.dieselnet.com/news/0002navc.html
- Code of Federal Regulations Part 86 United States Environmental Protection Agency
- http://www.dieselnet.com Diesel Net Website EcoPoint Inc. May 2000
- Meeting Minutes February 17 2000 Webb Tom NAVC Hybrid Bus Certification Working Group
- New York City Transit Hybrid Bus Demonstration Project Wildemann Patrick P. Valanzano Kimberly K. Allison Transmission Division -General Motors Corporation SAE Truck and Bus Conference November 1998
- The Challenges of Developing an Energy, Emissions and Fuel Economy Test Procedure for Heavy Duty Hybrid Electric Transit Vehicles Bass Edward A. Ullman Terry L. Owens Edwin Southwest Research Institute SAE Truck and Bus # 952610 November 1995