Zero ceria washcoat catalyst monitor
US8925300B2 · kind B2 · utility
0Cited by
6References
15Claims
0Family size
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Key dates
| Filing date | Dec 17, 2012 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Apr 10, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A catalyst degradation detection method for use with a zero ceria catalyst. The method uses techniques to measure transient responses to engine control events of upstream and downstream sensors to determine catalyst degradation and performance. By measuring transient behavior, the method can determine catalyst degradation and performance based on the limited oxygen storage of precious metal catalysts that do not include added ceria or other materials with high oxygen capture rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.