Potassium/manganese nitrogen oxide traps for lean-burn engine operation
US5837212A · kind A · utility
13Cited by
11References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1995 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Sep 21, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention is a nitrogen oxide trap comprising a porous support; and catalysts consisting of manganese and potassium loaded on the porous support. The trap may be used in an internal combustion engine exhaust gas catalyst system. During lean-burn operation of the engine the trap sorbs nitrogen oxides and releases the nitrogen oxides during decreased oxygen concentration in the exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.