Hydrocarbon adsorption and desorption control in vehicle exhaust systems using H2O traps
US11802502B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2023 |
| Grant date | Oct 31, 2023 |
| Priority date | — |
| Expiry date | Jan 30, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust system includes a light-off catalyst, an exhaust system component, and at least one H2O trap. The exhaust system component is upstream from the light-off catalyst and includes catalyst material, the catalyst material configured to store hydrocarbons during a period when the light-off catalyst is warming up to a light-off temperature. The at least one H2O trap is at or upstream from the exhaust system component and is configured to perform H2O adsorption and desorption to increase a length of time for the exhaust system component to reach a hydrocarbon release temperature and prevent the exhaust system component from reaching the hydrocarbon release temperature prior to the light-off catalyst reaching the light-off temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.