NOx decreasing apparatus for an internal combustion engine
US5388406A · kind A · utility
58Cited by
4References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1993 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Sep 10, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In an exhaust purification apparatus of an internal combustion engine having an NOx absorption and release material in an exhaust conduit, a heater is provided close to the NOx absorption and release material. When an NOx absorption operation continues for a predetermined period, the heater is switched on to raise the temperature of the NOx absorption and release material above a predetermined temperature, for example, 500.degree. C. When the temperature of the NOx absorption and release material is high, the NOx absorption and release material releases absorbed NOx and is regenerated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.