Arrangement for return of exhaust gases in supercharged engines with parallel turbines

Claim 1

Arrangement for return of exhaust gases in a supercharged combustion engine, which arrangement comprises: a first supercharger turbine; an exhaust system with an exhaust manifold which receives exhaust gases from the cylinders of the combustion engine and leads the exhaust gases to the first supercharger turbine, the exhaust manifold comprising a first exhaust manifold and a second exhaust manifold, each of which receives exhaust gases from different cylinders of the combustion engine; an inlet system for supply of inlet air to the cylinders of the combustion engine, the inlet system having a first supercharger compressor which is driven by the first supercharger turbine to pressurize the inlet air in the inlet system; an exhaust gas duct which communicates with the first exhaust manifold and which leads a first partial exhaust gas flow to the first supercharger turbine; an exhaust gas return duct which has a first end which communicates with the second exhaust manifold and a second end which communicates with the inlet system; a second supercharger turbine arranged in parallel with the first supercharger turbine and situated in the exhaust gas duct, the second supercharger turbine being driven by the first partial exhaust gas flow; and a second supercharger compressor arranged in the exhaust gas return duct and driven by the second supercharger turbine to deliver a second partial exhaust gas flow from the second exhaust manifold to the inlet system at a pressure increased by the second supercharger compressor.