All-in-one-egr

A method of operating a system for air ducting of an internal combustion engine in a motor vehicle, the system comprising a turbocharger arranged between an exhaust gas line for the expansion of exhaust gas exiting the internal combustion engine and an intake line for compression of intake air to be delivered to the internal combustion engine;

• the method comprising the steps of:
• providing a device comprising:
• a housing,
• a high pressure flow pathway with a first valve, the high pressure flow pathway branching from the exhaust gas line between the internal combustion engine and a turbine side of the turbocharger;
• a low pressure flow pathway with a second valve, the low pressure flow pathway branching from the exhaust gas line downstream from the turbine side of the turbocharger in a flow direction of the exhaust gas;
• a first flow pathway having a third valve and branching from the intake line upstream of a compressor side of the turbocharger in a flow direction of the intake air;
• a second flow pathway having a fourth valve and a third flow pathway having a fifth valve, the second flow pathway and the third flow pathway merging together in a mouth region of the first flow pathway;
• a fourth flow pathway having a sixth valve and branching from the intake line downstream from the compressor side of the turbocharger in the direction of flow of the intake air and extending to the mouth region of the first flow pathway;
• an exhaust gas heat exchanger, wherein at least a portion of each of the high pressure flow pathway, the low pressure flow pathway, the first flow pathway, the second flow pathway, the third flow pathway, the fourth flow pathway, and the exhaust gas heat exchanger is integrated within the housing;
• and
• adjusting at least one of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the sixth valve of the device between an open position and a closed position to change an operational mode of the device.