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Fuel Economy and Emissions Potential of a City Bus, Regenerative Power Train
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English
Abstract
Several years of studies and experimentation commencing in 1977 at the Canadian National Research Council, have culminated in the construction of a regenerative power train of the parallel hybrid type.
This paper presents the results of fuel economy tests conducted with the power train as installed in a North American City Bus.
Testing was carried out using the Arterial and City Business District phases of the ADB cycles, together with a 5 stop per mile, 30 mph (48 km/h) cycle. Interestingly, with an unmodified bus, the 30 mph cycle was found to require 19% more fuel than the cycle average of the Arterial and City Business District Phases.
In comparison with the same bus operating without the benefit of the regeneration package, a reduction in fuel consumption of some 17% was obtained.
Even better comparative results are expected of the same system when used in typical city driving situations.
A review of the energy balance in the current system, indicates that significant performance enhancements are feasible for a system of this type.
In addition to the reduction of fuel consumed, a corresponding reduction in the exhaust gas emissions and smoke is achieved. The system also provides the possibility of reducing the required engine power rating to achieve a given vehicle performance.
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Citation
Davies, A., "Fuel Economy and Emissions Potential of a City Bus, Regenerative Power Train," SAE Technical Paper 872267, 1987, https://doi.org/10.4271/872267.Also In
SAE 1987 Transactions: Reciprocating Engines--Spark Ignition and Diesel
Number: V96-4; Published: 1988-09-01
Number: V96-4; Published: 1988-09-01
References
- “Fuel Economy Measurement Test (Engineering Type) for Trucks and Buses.” S.A.E. Recommended Practice. S.A.E. J 1376 July 82
- “Baseline Advanced Design Transit Coach Specifications.” Department of Transportation, Urban Mass Transportation Administration Washington, D.C. April 1977
- Davies A.S. Heggie W.S. “Predicting the Retardation Performance of Vehicles Equipped with Hydro-Pneumatic Energy Storage Systems.” S.A.E. 859261 20th IECEC Conference Miami August 1985
- Hagin F. Merker P. “Drive Systems with Brake Energy Recovery.” U.S. Dept. of Energy 5th International Automotive Propulsion Systems Symposium April 1980
- 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
- Hahn H.W. “Improving the Overall Efficiency of Trucks and Buses.” Institution of Mechanical Engineers London December 1983
- Curtis C.H. “Energy Storage Systems for Public Service Vehicles.” Integrated Engine Transmission Systems Symposium Institution of Mechanical Engineers/University of Bath July 1986
- Zub Russel W. “Transit Bus Fuel Economy and Performance Simulation.” SAE 841691 Truck and Bus Meeting December 1984