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The Determination of EPA City Fuel Economy from Hot Start Results
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English
Abstract
Most computer simulation models do not predict the transient warm-up characteristics of a vehicle. This paper shows how the standard EPA fuel economy equations can be used to predict city fuel economy from only the “hot start” fuel consumption. The results of 2550 emissions certification tests on gasoline-fueled automobiles were used in the analysis. A plot of the data shows a strong linear relation between cold start fuel economy and hot start fuel economy; R2 = 99.76%. The regression equation from this comparison was then used to express EPA city fuel economy as a function of only the hot start fuel economy.
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Citation
Mrozek, P. and Watson, T., "The Determination of EPA City Fuel Economy from Hot Start Results," SAE Technical Paper 940300, 1994, https://doi.org/10.4271/940300.Also In
References
- Test Operations and Engineering Services Office A Journey Through Emissions and Fuel Economy Testing Ford Motor Company, Emission Laboratories Department 1985
- The Office of the Federal Register Code of Federal Regulations “Section 40: Protection of the Environment” National Archives and Records Administration 1992
- Nodler A. Liu T. Mathematics of Exhaust emission Testing Ford Motor Company 1981