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Computer Simulations of Emissions and Fuel Economy
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English
Abstract
A simulation of the exhaust emission testing system including a vehicle, dynamometer and driver on General Motors' analog-digital hybrid computer is described. The simulation predicts instantaneous and average results for hydrocarbons (HC), carbon monoxide (CO), oxides of nitrogen (NOx), carbon dioxide (CO2), and fuel economy over a predefined speed schedule such as the Environmental Protection Agency's (EPA's) city and highway schedules.
The simulation facilitates the study of sensitivity of several parameters which influence emissions and fuel economy. The usefulness of the simulation to study the effect of test parameters, test operating conditions and product changes such as the engine, transmission, axle, etc., on emissions and fuel economy is outlined. Results from some of these sensitivity studies are also presented.
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Citation
Juneja, W., Kelly, W., and Valentine, R., "Computer Simulations of Emissions and Fuel Economy," SAE Technical Paper 780287, 1978, https://doi.org/10.4271/780287.Also In
References
- Federal Register “Control of Air Pollution from New Motor Vehicles and New Motor Vehicle Engines” June 28 1977
- Juneja W. K. Horchler D. D. Haskew H. M. “A Treatise on Exhaust Emission Test Variability” Paper 770136 SAE International Automotive Engineering Congress and Exposition Detroit, Michigan February 1977
- Waters W. C. “General Purpose Automotive Vehicle Performance and Economy Simulator” Paper 720043 SAE Automotive Engineering Congress Detroit, Michigan January 1972
- Malliaris A. C. Withjack E. Gould H. “Simulated Sensitivities of Auto Fuel Economy, Performance and Emissions” Paper 760157 SAE Automotive Engineering Congress and Exposition Detroit, Michigan February 1976
- Radtke R. Frank A. Beachley N. “A Technique for Obtaining an Engine Emissions Model Based on Continuous EPA-CVS Test Data and a Dynamic Vehicle Model” Paper 760156 SAE Automotive Engineering Congress and Exposition Detroit, Michigan February 1976
- Date T. Yagi S. Ishizuya A. Fujii I. “Research and Development of the Honda CVCC Engine” Paper 740605 SAE West Coast Meeting Anaheim, California August 1974
- Obert E. F. “Internal Combustion Engines” International Textbook Company Pennsylvania 1968
- Tysver J. A. “General Motors Environmental Chamber for Vehicle Emission Testing” Paper 741003 Automobile Engineering Meeting Toronto, Canada October 1974