Exhaust gas purification device for internal combustion engine
US7370473B2 · kind B2 · utility
0Cited by
7References
4Claims
0Family size
Assignee
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Key dates
| Filing date | May 15, 2006 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Jun 10, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
By performing main fuel injection and sub fuel injection to perform rich operation of an engine, NOx purging of a NOx catalyst is carried out, and in the NOx purging, the ratio between the main fuel injection quantity and the sub fuel injection quantity is variably determined, within the range of 5:1 to 2:1 where the ratio of the sub fuel injection quantity is relatively great, such that the ratio of the sub fuel injection quantity is greater as the temperature of a three-way catalyst becomes higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.