Activated Carbon Canister Performance During Diurnal Cycles: An Experimental and Modeling Evaluation

Paper #:
  • 971651

Published:
  • 1997-05-01
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.
Pages:
14
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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