Exhaust gas recirculation apparatus for an internal combustion engine and the respective operating method
US7591256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2007 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Sep 26, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust gas recirculation apparatus (5) for an internal combustion engine (1), in particular in a motor vehicle, has an exhaust gas recirculation line (9) which can be connected at the inlet end to an exhaust gas system (4) of the internal combustion engine (1) and at the outlet end to a fresh gas system (3) of the internal combustion engine (1) and having a return valve (12) arranged in the exhaust gas recirculation line (9) for adjusting an exhaust gas recirculation rate by varying the flow-through cross section of the exhaust gas recirculation line (9). To improve the efficacy of the exhaust gas recirculation, the exhaust gas recirculation valve (12) is designed so that it adjusts the respective exhaust gas recirculation rate at least in one operating state of the exhaust gas recirculation apparatus (5), so that it alternately reduces and increases and/or blocks and opens the flow-through cross section of the exhaust gas recirculation line (9) at predetermined or regulated switching points in time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.