Method and device for the exhaust-gas aftertreatment of an internal combustion engine
US11002199B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2016 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Jan 10, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a method for the exhaust-gas aftertreatment of an internal combustion engine (10), and to an internal combustion engine (10) having an exhaust-gas aftertreatment device for carrying out a method of said type. The internal combustion engine (10) is supplied with fresh air by way of a compressor (18), has an adjustable valve control means (12) for the inlet valves (14) and/or the outlet valves (16), and is connected to an exhaust duct (20), wherein, in the exhaust duct (20), there is arranged a first three-way catalytic converter (24), and an injection valve (26) for introducing fuel into the exhaust duct (20) is arranged, as viewed in the flow direction of an exhaust gas of the internal combustion engine (10), downstream of an outlet (22) of the internal combustion engine (10) and upstream of the first three-way catalytic converter (24). The method comprises the following steps:—operating the internal combustion engine (10) in a scavenging mode,—introducing a superstoichiometric exhaust gas into the exhaust duct (20),—metering fuel into the exhaust duct (20) upstream of the first three-way catalytic converter (24) such that a stoichiometric exhaust gas is re…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.