Exhaust purification device of internal combustion engine
US8042327B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Mar 22, 2007 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | Dec 18, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An engine with an exhaust passage in which a catalyst purifying NOx and an NOx adsorbent adsorbing NOx in an exhaust gas are arranged successively from the upstream side. After engine startup until the catalyst is activated, the NOx in the exhaust gas is adsorbed at the NOx adsorbent. NOx adsorbed at the NOx adsorbent is removed by dissolution by supplying a solvent from an injector. After the catalyst is activated, the solvent containing the NOx removed by dissolution is sprayed from an injector and the NOx contained in the sprayed solvent is purified by the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.