System and method for unloading hydrocarbon emissions from an exhaust after-treatment device
US8857152B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2010 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Dec 31, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1459
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method unloads hydrocarbon emissions deposited by an exhaust gas on an after-treatment device that is employed in an exhaust system for an internal combustion engine. The method includes determining whether the engine has been operating at a preset idle speed for a predetermined amount of time. The method also includes increasing the preset idle speed by a predetermined value if the engine has been operating at a preset idle speed for a predetermined amount of time. The increasing of the engine idle speed increases a flow rate of the exhaust gas to the after-treatment device and unloads the deposited hydrocarbon emissions. A system for unloading hydrocarbon emissions deposited on an after-treatment device and a vehicle employing such a system are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.