Ash detection in diesel particulate filter
US8470070B2 · kind B2 · utility
2Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2010 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Aug 3, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Detecting ash in a diesel particulate filter includes receiving data indicative of signal attenuation for ash-responsive and ash-insensitive RF signals transmitted through a diesel particulate filter containing trapped soot and ash. A difference between the RF signals, such as a difference in signal attenuation, may be leveraged to detect a relative ash loading state or a change in relative ash loading state of the diesel particulate filter, and responsively indicate that filter cleaning is needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.