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Mathematical modeling of electrically heated monolith converters: Power and energy reduction strategies

Publication ,  Journal Article
Oh, SH; Bissett, EJ; Brown, DB; Ament, F
Published in: SAE Technical Papers
1996

A transient heated converter model, coupled with vehicle emission testing with a prototype Park Avenue, has been used to develop strategies for reducing electrical power and energy requirements for electrically heated monolith converters (EHCs). The following two strategies were examined in detail: open-loop fuel-rich engine operation and use of low-thermal-mass electric heaters. It is found that although effective individually, a combination of these strategies provides even greater reductions in electrical power and energy requirements. For example, using a small-volume electric heater with fuel-rich engine calibration is predicted to give a 3-fold reduction in power and a 5-fold reduction in energy required to meet a cold-start HC emission target, compared to early prototype EHC systems operating with the baseline (fuel-lean) engine calibration. It is also found that a small-volume heater in an optimized EHC system serves primarily as a heat transfer medium/ignitor rather than a catalytic conversion device. This function of a small electric heater can be augmented by coupling it with an unheated "lightoff" catalyst containing high concentrations of noble metals. © 1996 Society of Automotive Engineers, Inc.

Duke Scholars

Published In

SAE Technical Papers

DOI

Publication Date

1996

Related Subject Headings

  • 0910 Manufacturing Engineering
  • 0902 Automotive Engineering
 

Citation

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Oh, S. H., Bissett, E. J., Brown, D. B., & Ament, F. (1996). Mathematical modeling of electrically heated monolith converters: Power and energy reduction strategies. SAE Technical Papers. https://doi.org/10.4271/961213
Oh, S. H., E. J. Bissett, D. B. Brown, and F. Ament. “Mathematical modeling of electrically heated monolith converters: Power and energy reduction strategies.” SAE Technical Papers, 1996. https://doi.org/10.4271/961213.
Oh, S. H., et al. “Mathematical modeling of electrically heated monolith converters: Power and energy reduction strategies.” SAE Technical Papers, 1996. Scival, doi:10.4271/961213.

Published In

SAE Technical Papers

DOI

Publication Date

1996

Related Subject Headings

  • 0910 Manufacturing Engineering
  • 0902 Automotive Engineering