Soot pre-loading of particulate matter aftertreatment devices as means for reducing hydrocarbon emissions during cold start
US9027333B2 · kind B2 · utility
3Cited by
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20Claims
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Key dates
| Filing date | Jul 1, 2013 |
| Grant date | May 12, 2015 |
| Priority date | — |
| Expiry date | Jul 2, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Methods and systems for reducing hydrocarbon emissions from an internal combustion engine. The engine's exhaust aftertreatment system has at least a particulate matter (soot) filter and means for actively regenerating the particulate matter filter. During operation of the engine, the soot loading state of the particulate matter filter is monitored. The filter is regenerated when required, but the regeneration is controlled so that the particulate matter filter retains a small level of soot loading. This soot “pre-loading” ensures hydrocarbon reduction during the next cold start.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.