Exhaust gas purification system for internal combustion engine and exhaust gas purification method therefor
US7895830B2 · kind B2 · utility
4Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2007 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Feb 5, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
If an exhaust throttle valve changes to ON state from OFF state under a filter regeneration control condition for regenerating a PM filter, a differential pressure sensor detects a change of a differential pressure following an operation of the exhaust throttle valve. An increase in an exhaust backpressure is calculated based upon the change in the differential pressure. If the increase in the exhaust backpressure is lower than a predetermined value, the operation of the exhaust throttle valve is determined to be malfunctioning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.