Exhaust gas treatment system and method having improved low temperature performance
US10718245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2018 |
| Grant date | Jul 21, 2020 |
| Priority date | — |
| Expiry date | Jun 13, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway configured to receive exhaust gas from the internal combustion engine, a temperature sensor configured to sense a temperature of the exhaust gas, a first injector configured to inject a first reductant into the exhaust gas pathway at a first location when the sensed temperature is below a threshold temperature, and a first treatment element positioned downstream of the first location. A second injector is configured to inject a second reductant of a different composition than the first reductant into the exhaust gas pathway at a second location downstream of the first treatment element when the sensed temperature is above the threshold temperature. The system further includes a second treatment element positioned downstream of the second location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.