Method and device for controlling exhaust emission from internal combustion engine
US7704473B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 5, 2005 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Sep 20, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2610/03
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A purification method excellent in removing particulates or the like from exhaust gas from an internal combustion engine, in particular, a diesel engine or the like. The purification method uses an exhaust gas purification apparatus including an oxidation zone installed with an oxidation catalyst supporting both platinum and palladium, and a filtering zone installed with a particulate filter, along exhaust gas flow at the exhaust gas passage of an internal combustion engine. Hydrocarbon-based liquid is supplied to the inflow side of the exhaust gas of the oxidation zone at the time when 2 to 10 g of particulates per 1 liter of the particulate filter are caught, to raise temperature of the exhaust gas up to equal to or higher than 550° C. by the oxidation catalyst so as to make the residue of the particulate filter combusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.