EGR system with particle filter and wastegate

A method for operating a gasoline engine having an exhaust gas conducting system comprising an exhaust gas line adapted to be connected to an exhaust manifold of the gasoline engine, an inlet line adapted to be connected to an intake manifold of the gasoline engine, and a turbine which is arranged in the exhaust gas line,

• wherein
• at least one exhaust gas recirculation line having an EGR valve is provided which opens into the inlet line, and that the exhaust gas line has at least one bypass line with a bypass choke flap valve, which opens into the exhaust gas line downstream of the turbine, wherein
• a) the at least one exhaust gas recirculation line branches off upstream of the turbine, and the at least one bypass line branches off to the at least one exhaust gas recirculation line, or
• b) the at least one bypass line branches off upstream of the turbine, and the at least one exhaust gas recirculation line branches off to the at least one bypass line, wherein
• c) at least one particle filter is arranged in the at least one exhaust gas recirculation line or in the at least one bypass line upstream of the at least one exhaust gas recirculation line or in the exhaust gas line upstream of the at least one exhaust gas recirculation line, wherein,
• for the purpose of higher load operation of the gasoline engine, the at least one bypass line and simultaneously the at least one exhaust gas recirculation line are acted on with exhaust gas, wherein the at least one particle filter has a catalytically acting coating for the conversion of CO, HC and NOx and an exhaust gas catalytic converter configured as 3-way catalytic converter is provided downstream of the turbine, wherein
• d) during an operation of the gasoline engine, with the EGR valve in a partially open position, at least a part of the exhaust gas flow is conveyed through the at least one particle filter and through the at least one bypass line, wherein a regeneration of the at least one particle filter takes place;
• e) during and after the start of the gasoline engine, with the EGR valve at least partially closed, by opening the bypass choke flap valve, at least a part of the exhaust gas flow is conveyed through the at least one particle filter and through the at least one bypass line past the turbine, until a predetermined state requires the closing of the at least one bypass line;
• f) during the higher load operation of the gasoline engine, the at least one bypass line is used as a wastegate for conveying at least a part of the exhaust gas flow past the turbine, wherein a regeneration of the at least one particle filter is carried out.

A gasoline engine having an exhaust gas conducting system comprising an exhaust gas line adapted to be connected to an exhaust manifold of the gasoline engine, an inlet line adapted to be connected to an intake manifold of the gasoline engine, and a turbine which is arranged in the exhaust gas line,

• wherein
• at least one exhaust gas recirculation line having an EGR valve is provided which opens into the inlet line, and that the exhaust gas line has at least one bypass line with a bypass choke flap valve, which opens into the exhaust gas line downstream of the turbine, wherein
• a) the at least one exhaust gas recirculation line branches off upstream of the turbine, and the at least one bypass line branches off to the at least one exhaust gas recirculation line, or
• b) the at least one bypass line branches off upstream of the turbine, and the at least one exhaust gas recirculation line branches off to the at least one bypass line, wherein
• c) at least one particle filter is arranged in the at least one exhaust gas recirculation line or in the at least one bypass line upstream of the at least one exhaust gas recirculation line or in the exhaust gas line upstream of the at least one exhaust gas recirculation line, wherein,
• for the purpose of higher load operation of the gasoline engine, the at least one bypass line and simultaneously the at least one exhaust gas recirculation line are acted on with exhaust gas, wherein the at least one particle filter has a catalytically acting coating for the conversion of CO, HC and NOx and an exhaust gas catalytic converter configured as 3-way catalytic converter is provided downstream of the turbine, wherein the inlet line upstream of the opening of the at least one exhaust gas recirculation line is configured as a fresh air line.