Reduction of internal combustion engine emissions with improvement of soot filtration efficiency
US11661872B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2021 |
| Grant date | May 30, 2023 |
| Priority date | — |
| Expiry date | Jan 8, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2900/1611
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust purification system may include at least one catalyst in an exhaust flow path of an internal combustion engine to decrease gaseous pollutants from an exhaust gas, a first particulate filter downstream of the catalyst, and a second particulate filter with a porosity lower and a lower mean pore size than the first particulate filter and in a bypass flow line downstream of the first particulate filter, the bypass flow line being configured to open and close based on at least one condition of the exhaust purification system or conditions of the exhaust gas. The second particulate filter may be configured to be removed and replaced when full. A method of purifying an exhaust gas through the exhaust purification system is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.