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The Reduction of City Bus Exhaust Emissions by Means of a Regenerative Power Train
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Abstract
A PREVIOUS PAPER (1*), reported on fuel consumption reductions achieved, by the use of a Regenerative Power Train system, applied to a city bus.
An overall fuel economy gain of 20% was obtained previously, on the track, when operating the bus on the City Business District cycle (2) [CBD cycle, 20 mph maximum speed and 7 stops per mile], and a similar 30 mph cycle.
The results reported here, were obtained using a CBD type driving cycle and indicate the extent of the reductions in regulated diesel exhaust emissions, achievable with a Regenerative Power Train.
NOx was reduced 19 percent somewhat in line with the percentage improvement in fuel economy; particulate and CO emissions were more strongly influenced, with reductions of 27 and 60 per cent, respectively. HC emissions were the least affected with a reduction of 8 percent.
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Davies, A., "The Reduction of City Bus Exhaust Emissions by Means of a Regenerative Power Train," SAE Technical Paper 890267, 1989, https://doi.org/10.4271/890267.Also In
References
- Davies A.S. “Fuel Economy and Emissions Potential of a City Bus, Regenerative Power Train” SAE 872267 Truck and Bus Meeting November 1987
- “Baseline Advanced Design Transit Coach Specifications” Department of Transportation, Urban Mass Transportation Administration Washington, D.C. April 1977
- Ullman Terry. L. Hare Charles. T. “Emissions from Two Methanol-Powered Buses” SAE Paper 860305
- Davies A.S. Heggie W.S. “Predicting the Retardation Performance of Vehicles Equipped with Hydro-Pneumatic Energy Storage Systems.” SAE 859261 20th IECEC Conference Miami August 1985
- Heggie W.S. Davies A.S. “The Development and Testing of a Regenerative Diesel-Hydraulic Power Train for the Urban Bus.” B.H.R.A. Conference University of Bath September 1986