| 摘要 |
The invention relates to an exhaust gas recirculation apparatus ( 5 ) for an internal combustion engine ( 1 ), in particular in a motor vehicle, having 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.
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