Method and system for purifying exhaust gas for prevention of NH3 slip
US10927737B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Oct 21, 2019 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Oct 21, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system for purifying exhaust gas includes a controller to predict a possibility of ammonia (NH3) slip occurring at the rear end of a selective catalytic reduction on a diesel particulate filter (SDPF) by comparing a convective heat transfer value (h) with a first predetermined value. The controller determines whether an engine is rapidly accelerated, and performs a control to prevent introduction of ammonia downstream of the SDPF when the ammonia slip is predicted to occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.