NOx sensor malfunction diagnostic device and malfunction diagnostic method
US8219278B2 · kind B2 · utility
19Cited by
3References
9Claims
0Family size
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Key dates
| Filing date | Aug 11, 2008 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Feb 23, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The NOx sensor malfunction diagnostic device includes a control section. The control section performs the supplying of an excess amount of reducing agent, which is more than an amount required to reduce adsorbed NOx in a NOx reduction catalyst when a predetermined amount of NOx has been adsorbed in the NOx catalyst, and detects malfunctions of the NOx sensor based on NOx sensor output signal when the excess amount of reduction agent is supplied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.