Exhaust emission control system and method for removal and storage of vehicle exhaust gas nitrogen oxides during cold operation
US6964157B2 · kind B2 · utility
10Cited by
11References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2002 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Mar 28, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system and a method for removing NOx from an internal combustion engine exhaust stream at lower temperatures, and releasing the NOx back into the exhaust stream at higher temperatures, includes an occluder with an adsorbent able to selectively adsorb NOx at temperatures below a predetermined temperature and desorb NOx at temperatures above the predetermined temperature. The system includes an engine control module that operates the engine during cold operation so as to produce an increased ratio of NO2/NO.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.