Exhaust gas treatment system including an enhanced SCR diagnostic unit
US9194268B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2013 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Nov 30, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Embodiments of the invention include a method for performing diagnostics of a selective catalytic reduction (“SCR”) device in an exhaust gas treatment system of an internal combustion engine. The method includes monitoring an amount of sulfur in the SCR device of the exhaust treatment system and monitoring, by an SCR diagnostics module, an efficiency of the SCR device and indicating when the efficiency of the SCR device falls below an efficiency diagnostics threshold. Based on determining that the amount of sulfur in the SCR device is above a first threshold, the method includes disabling an operation of the SCR diagnostics module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.