Exhaust purification device of compression ignition type internal combustion engine
US7703275B2 · kind B2 · utility
29Cited by
1References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 29, 2004 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Jul 8, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/28
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A fuel adding valve (14), an HC adsorbing and oxidation catalyst (11), and a NOx storing catalyst (12) are successively arranged in an exhaust passage of an internal combustion engine toward the downstream side. When the NOx storing catalyst (12) should release NOx, particulate fuel is added from the fuel adding valve (14). This fuel is adsorbed once at the HC adsorbing and oxidation catalyst (11), then gradually evaporates to make the air-fuel ratio of the exhaust gas flowing into the NOx storing catalyst (12) rich. Due to this, NOx is released from the NOx storing catalyst (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.