Method for selective catalytic reduction with desorption of ammonia from a cartridge in an exhaust line
US11149608B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Sep 19, 2018 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Sep 19, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a method for selective catalytic reduction operating by desorbing ammonia from at least one storage cartridge in an exhaust line at the output of a motor vehicle engine, the cartridge being arranged in at least one bypass branch of a main line of the exhaust line. The exhaust gas flow rate in the bypass branch is controlled according to an estimated or measured temperature in the bypass branch and a desired amount of ammonia to be injected by desorption estimated in the exhaust line to provide a catalytic reduction of the nitrogen oxides present in the exhaust gas, a temperature of the cartridge being estimated according to the gas flow rate at the temperature estimated or measured during a given time interval and corresponding to an amount of desorbed ammonia equal to the desired amount of ammonia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.