Exhaust gas recirculation (EGR) system
US8056544B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2008 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Sep 14, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/05
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for operating an internal combustion engine Exhaust Gas Recirculation (EGR) system that includes producing an EGR valve position signal to decrease the amount of exhaust gas passed to the EGR cooler when a processor determines the EGR cooler efficiency is less than the predetermined level and producing an EGR coolant valve position signal to decrease the amount of coolant passed to the EGR cooler when such processor determines the EGR cooler efficiency is less than the predetermined level. The processor produced EGR valve and the EGR coolant valve position signals result in regeneration within the cooler, returning the effectiveness of the cooler to a near “clean” condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.