Electrically assisted turbocharger, drive unit having an electrically assisted turbocharger, and method for an electrically assisted turbocharger

A drive unit comprising:

• an electrically assisted exhaust gas turbocharger including:
• a fresh air-conducting section;
• an exhaust gas-conducting section;
• a bearing section;
• a rotating assembly comprising:
• a shaft that extends in an axial direction and that is rotatably mounted in the bearing section;
• a compressor wheel which is connected to the shaft for conjoint rotation therewith, wherein the compressor wheel is rotatably accommodated in the fresh air-conducting section;
• and
• a turbine wheel which is connected to the shaft for conjoint rotation therewith, wherein the turbine wheel is rotatably accommodated in the exhaust gas-conducting section;
• an electric motor having a rotor and a stator, wherein the rotor is arranged in operative connection with the shaft;
• a coolant channel configured to guide a coolant to flow therethrough, to cool the motor, wherein the coolant is compressed air that is extracted downstream of the compressor wheel and that is fed to at least one inlet of the coolant channel;
• and
• a sealing element facing the stator of the motor in the axial direction, wherein the sealing element is located between the motor and the fresh air-conducting section in the axial direction;
• an internal combustion engine having an intake line to be supplied with the coolant from the electrically assisted exhaust gas turbocharger;
• a charging air cooler connected to the intake line of the internal combustion engine;
• a first cooling path including a first extraction point of the coolant formed downstream of the compressor wheel and upstream of the charging air cooler;
• and
• a second cooling path including a second extraction point of the coolant formed downstream of the charging air cooler and upstream of the intake line of the internal combustion engine,
• wherein the first cooling path is fluidly coupled to the second cooling path at a coupling point.