DPF failure detection method and DPF failure detection device
US8770016B2 · kind B2 · utility
6Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2011 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Aug 17, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention provides a DPF failure detection method and a DPF failure detection device, which can be realized with a simple configuration and detect a failure at low cost. The theoretical deposited amount of PM on a DPF 4 is calculated from the operating state of an internal combustion engine 2. The actual deposited amount of the PM on the DPF 4 is measured based on the electrical capacitance of an electrical capacitance type PM sensor 6. When the divergence of the actual deposited amount from the theoretical deposited amount exceeds an allowable limit, it is determined that the DPF 4 has a failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.