Apparatus, method, and system for diagnosing reductant deposits in an exhaust aftertreatment system
US9909480B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2015 |
| Grant date | Mar 6, 2018 |
| Priority date | — |
| Expiry date | Apr 12, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust gas treatment system for an internal combustion engine may have a reductant delivery system that delivers reductant to an exhaust stream in an exhaust aftertreatment system. A temperature sensor may be positioned in or near the flow of reductant and exhaust to measure the temperature of the reductant and exhaust. A change in temperature over time, such as an increase, decrease, or change in variation amplitude, may indicate the presence of a reductant deposit in the system. Detection of the deposit may initiate a regeneration cycle in which the operating characteristics of the system change to eliminate the reductant deposit to prevent it from hindering the performance of the exhaust aftertreatment system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.