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PGM Optimization by Robust Design
Technical Paper
2005-01-3849
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A Robust Engineering experiment was performed to determine the effects PGM loading and placement on the FTP emissions of a 4 cylinder 2.4L and two 8 cylinder 4.7L vehicles. 1.3L catalytic converters were used containing a front and rear catalyst of equal volume. The experiment is defined by a Taguchi L-8 array. Eight different combinations of catalyst PGM loadings were aged and evaluated. Results show that nmHC and NOx emissions are predominately affected by the PGM loading of the front catalyst. The rear catalyst is insensitive to either Pt or Pd which can be used at low concentrations. Results also compare the benefits of Pd and Rh to reduce emissions. Confirmation runs suggest that significant reductions in PGM cost can be achieved over baseline designs.
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Citation
Mitchell, G., Zammit, M., and Ball, D., "PGM Optimization by Robust Design," SAE Technical Paper 2005-01-3849, 2005, https://doi.org/10.4271/2005-01-3849.Also In
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