| 摘要 |
In a supercharged engine it is difficult to return exhaust gases from the exhaust side to the inlet side during operating situations in which the pressure is greater on the inlet side than on the exhaust side. To overcome this, an EGR turbine (6) is incorporated in the exhaust gas flow in parallel with the turbine (4) of the supercharger. The EGR turbine (6) is driven by a first partial exhaust gas flow (21) and is used for driving an EGR compressor (7) which delivers a second partial gas flow (22) which is to be returned to the inlet manifold (2) of the combustion engine. The first and second partial gas flows (21, 22) intended respectively to drive the EGR turbine (6) and be returned to the inlet side via the EGR compressor (7) are both tapped from the exhaust manifold (3, 3') upstream with respect to the supercharger turbine (4) as seen in the exhaust gas flow direction. The exhaust gas flows through the EGR turbine (6), and the EGR compressor (7) are controlled by individual control valves (15, 17). |
