Internal combustion engine system

An internal combustion engine (“ICE”), system, comprising:

• an internal combustion engine ICE;
• a turbocharger receiving exhaust gases from the ICE, said turbocharger having a turbine and a compressor for compressing intake air and feeding said intake air to said ICE;
• a turbo turbine unit disposed in an exhaust gas path downstream the turbocharger and arranged to receive exhaust gas from the turbocharger;
• said turbo turbine unit having a turbine wheel, a bearing housing defining an inside volume for containing lubrication oil, and a sealing arrangement positioned in the vicinity of the turbine wheel for preventing lubrication oil from escaping from the inside volume of the bearing housing to an exhaust duct of the turbo turbine unit, wherein said ICE system further comprises:
• a buffer air conduit extending between a selected position in or at the compressor of the turbocharger, wherein said compressor comprises a radial tap arranged to extend from an outer radial position of the compressor to the selected position inside the compressor and configured to connect the buffer air conduit to the compressor, and a buffer air inlet of the turbo turbine unit, said buffer air inlet being arranged in fluid communication with a buffer air channel arranged inside the turbo turbine unit and adapted to direct buffer air to a position in-between axially opposite arranged annular sealing members of the sealing arrangement so as to provide a counter-pressure against at least one of the annular sealing members when the ICE is started.