Development of Advanced and Low PGM TWC System for LEV2 PZ EV and LEV3 SULEV30

2012-01-1242

04/16/2012

Event
SAE 2012 World Congress & Exhibition
Authors Abstract
Content
A two-brick gasoline engine aftertreatment system with advanced washcoat technology was developed for LEV2 PZEV2 legislation, and its application to the upcoming LEV3 SULEV30 emission standard was demonstrated. The system was comprised of 1) a palladium only catalyst in the close coupled position with improved catalytic performance and high phosphorus poisoning resistance compared with 09MY technology, and 2) an underfloor palladium rhodium catalyst technology in which the nitric oxides (NOx) reduction activity was enhanced by preventing the deactivation of rhodium under rich conditions. As a result, the palladium only + palladium rhodium catalysts system met the LEV2 PZEV standard with three quarters of the PGM and half the rhodium of the system used on the Honda 09MY Accord vehicle. The system was also demonstrated to meet the LEV3 SULEV30 standard with some margin. This study indicates that advanced palladium only catalysts have the potential to meet future legislation allowing further reductions in rhodium usage.
Meta TagsDetails
DOI
https://doi.org/10.4271/2012-01-1242
Pages
8
Citation
Matsuzono, Y., kuroki, K., Nishi, T., Suzuki, N. et al., "Development of Advanced and Low PGM TWC System for LEV2 PZ EV and LEV3 SULEV30," SAE Technical Paper 2012-01-1242, 2012, https://doi.org/10.4271/2012-01-1242.
Additional Details
Publisher
Published
Apr 16, 2012
Product Code
2012-01-1242
Content Type
Technical Paper
Language
English