Systems and methods for hot air injection into exhaust ports
US11725562B2 · kind B2 · utility
0Cited by
7References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 9, 2020 |
| Grant date | Aug 15, 2023 |
| Priority date | — |
| Expiry date | Oct 22, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Methods and systems are provided for reducing emissions during an engine cold start. In one example, a method may include, during emission control device heating, injecting heated air into an exhaust runner of each cylinder of the engine during an exhaust stroke of the corresponding cylinder, after a blowdown exhaust pulse. In this way, an amount of hydrocarbons in feedgas provided to the emission control device prior to the emission control device reaching its light-off temperature may be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.