Gasoline particulate filters with high initial filtering efficiency and methods of making same
US11441458B2 · kind B2 · utility
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61References
7Claims
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Assignee
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Key dates
| Filing date | Aug 10, 2020 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Aug 10, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Gasoline Direct Injection (GDI) engines require gasoline particulate filters (GPFs) as a key component of the emissions control system to reduce particulate emissions. GPFs are known to have poor initial performance, with performance increasing after the filter develops a cake. This poor initial performance make it impossible to accurately assess vehicle emissions performance at the mileage requirements for vehicle certification. Compositions and methods are disclosed to improve filtration efficiency in a fresh or low mileage GPF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.