Methods for reducing cold start emissions for engines
US11473518B1 · kind B1 · utility
1Cited by
1References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 24, 2021 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Aug 24, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods are provided for reducing exhaust gas emissions during a cold-start of an engine. In one example, a method may include generating a flame front in an exhaust port of an exhaust system, heating exhaust gas flowing into an emission control device of the exhaust system and thereby expediting the approach to a light-off temperature of the emission control device, and directing the flame front back to the cylinder as part of a combustion stroke of the four-stroke engine cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.