Control system for lean air-fuel ratio NOx catalyst system
US6357226B2 · kind B2 · utility
22Cited by
24References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1998 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Oct 22, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A control system is described for optimizing the reduction of nitrogen oxides in exhaust gas produced by an internal combustion engine, especially those internal combustion engines that employ a lean air-fuel ratio. The control system employs a temperature control assembly that is capable of selectively heating the exhaust gas prior to introduction into the NOx catalyst system, thus rapidly bringing the temperature of the NOx catalyst system up to operating temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.