Turbocharger arrangement for an internal combustion engine

A turbocharger arrangement in an engine, comprising:

• a turbocharger housing surrounding a sealed inner space;
• a shaft extending through the turbocharger housing;
• a turbine wheel arranged on the shaft and driving a compressor unit;
• a bearing mounting the shaft in the turbocharger housing;
• an oil inlet and a plurality of distributor ducts lubricating the bearing;
• and
• a pressure changing unit comprising a vacuum line, the pressure changing unit in fluidic communication with the sealed inner space to adjust pressure in the sealed inner space based on engine conditions, wherein the pressure changing unit is configured to decrease the pressure in the sealed inner space based on a turbocharger speed.

A turbocharger arrangement for an internal combustion engine, comprising:

• a turbocharger housing surrounding an inner space;
• a shaft extending through the turbocharger housing;
• a turbine wheel arranged on the shaft and driving a compressor unit;
• a bearing arrangement mounting the shaft in the turbocharger housing;
• an oil inlet and a plurality of distributor ducts lubricating the bearing arrangement;
• and
• a seal sealing off the turbocharger housing with respect to the shaft including a pressure changing unit comprising a vacuum line, the pressure changing unit in fluidic communication with the inner space and configured to adjust pressure of the inner space, wherein the turbocharger arrangement has an oil outflow line in fluidic communication with the inner space and has a check valve counteracting pressure compensation between the inner space and an oil sump.