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Activated Carbon Canister Performance During Diurnal Cycles: An Experimental and Modeling Evaluation
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Abstract
A vehicle's evaporative emission control system is continuously working, even when the vehicle is not running, due to generation of vapors from the fuel tank during ambient temperature variations. Diurnal temperature cycles cause the fuel tank to breathe the fuel vapor in and out, and thus the activated carbon canister is constantly loading and purging the hydrocarbon vapors.
This paper discusses a study undertaken at Ford to evaluate the relationship between carbon canister condition and fuel tank vapor generation during diurnal cycles. The results of an extensive set of experiments are presented, and the data from these experiments are compared to the output of a fuel vapor system model also developed at Ford. Key parameters relating to the migration of hydrocarbons during the experimental conditions studied, including initial canister condition, canister volume, and canister geometry, are discussed.
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Citation
Johnson, P., Jamrog, J., and Lavoie, G., "Activated Carbon Canister Performance During Diurnal Cycles: An Experimental and Modeling Evaluation," SAE Technical Paper 971651, 1997, https://doi.org/10.4271/971651.Also In
Factors Influencing Emissions and Emissions Formation Processes
Number: SP-1275; Published: 1997-05-05
Number: SP-1275; Published: 1997-05-05
References
- Haskew H. M. Cadman William R. “Evaporative Emissions Under Real Time Conditions” 891121 SAE Technical Paper Series 1989
- Johnson H. R. Williams R.S. “Performance of Activated Carbon in Evaporative Loss Control Systems” 902119 SAE Technical Paper Series 1990
- U. S. Code of Federal Regulations Control of Air Pollution From New Motor Vehicles and New Motor Vehicle Engines: Certification and Test Procedures Office of the Federal Register Washington, DC 1995
- Darlington T. L. Platte L. Shih C. “Effects of Fuel Volatility and Temperature on Vehicle Evaporative Emissions” 860529 SAE Technical Paper Series 1986
- Kishan S. DeFries T.H. Klausmeier R.F. “Description of a Motor Vehicle Evaporative Emissions Model - EVAP 2.0” 881593 SAE Technical Paper Series 1988
- DeFries T. H. Kishan S. Klausmeier R.F. “Relative Importance of 22 Parameters to Evaporative Emissions - A Sensitivity Analysis of EVAP 2.0” 881594 SAE Technical Paper Series 1988
- Johnson P. J. Khami Roger J. Bauman Jeffrey E. Goebel Thomas D. Clark Vernon L. Hirt David L. Luft Paul J. “Carbon Canister Development for Enhanced Evaporative Emissions and On-board Refueling” 970312 SAE Technical Paper Series 1997
- Lavoie G. A. Johnson P.J. Hood J.F. “Carbon Canister Modeling for Evaporative Emissions: Adsorption and Thermal Effects” 961210 SAE Technical Paper Series 1996