Exhaust gas purification device
US6546721B2 · kind B2 · utility
27Cited by
7References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An engine comprising a particulate filter which is arranged in the exhaust passage and has a function of absorbing NOx, where the amount of discharged particulate discharged from the combustion chamber per unit time is made smaller than the amount of particulate removable by oxidation per unit time without emitting a luminous flame on the particulate filter and where the temperature of the particulate filter is maintained in a temperature range where the NOx absorption rate becomes more than a certain value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.