Patent ID: 7426830

Claim:
A supercharged internal combustion engine having at least two cylinders, which are configured in such a way that they form two groups of in each case at least one cylinder, both cylinder groups in each case being equipped with an exhaust pipe, and the two exhaust pipes being in communication with one another, and having two exhaust gas turbochargers, turbines of the two exhaust gas turbochargers being connected in parallel by virtue of a first turbine of a first exhaust gas turbocharger being arranged for receiving exhaust gas in the exhaust pipe of the first cylinder group and a second turbine of a second exhaust gas turbocharger being arranged for receiving exhaust gas in the exhaust pipe of the second cylinder group, with their compressors connected in series, by virtue of a first compressor of the first exhaust gas turbocharger being arranged in a common intake line, which is used to supply the internal combustion engine with fresh air or fresh mix, and a second compressor of the second exhaust gas turbocharger being arranged downstream of the first compressor in this common intake line, and having an exhaust gas recirculation which comprises a line which upstream of one of the two turbines branches off from the exhaust pipe assigned to this turbine and opens out into the common intake line, an exhaust gas mass flow control valve disposed between the first one of the pair of cylinder groups and an input of the turbine of the first one of the pair of exhaust gas turbochargers; a by-pass control valve disposed between the atmosphere and an inlet to the compressor the second one of the pair of exhaust gas turbochargers.