Exhaust gas purification device
US10287957B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2016 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Jul 24, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust gas purification device includes: an actual pressure difference obtainer that acquires an actual pressure difference which is an actual measurement value of a pressure difference of a filter; a flow rate obtainer that acquires a flow rate of exhaust gas flowing into the filter; a calculation pressure difference calculator that calculates a calculation pressure difference which is a calculated value of the pressure difference of the filter in a normal state when the exhaust gas flows into the filter with the flow rate acquired by the flow rate obtainer; and an abnormality determiner that performs an abnormality determination of the filter based on a pressure difference variation ratio which is a ratio between a variation in the actual pressure difference and a variation in the calculation pressure difference in response to a variation in the flow rate of the exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.