Method and device for driving a turbocharger

Abstract

In a method for driving a turbocharger with the aid of induction air which is fed to the turbine inlet, the compressed air which exits at the compressor outlet is guided into a turbine auxiliary inlet of the turbine, which turbine auxiliary inlet opens downstream of the turbine inlet into the turbine chamber at a point, at which the pressure in the driven state of the turbine is lower than the pressure of the air which is compressed by the turbocompressor.

1 . A method of driving a turbocharger ( 1 ) comprising a turbine ( 2 ) and a turbo compressor ( 3 ), with a housing ( 4 ) which includes a turbine chamber ( 5 ) having a turbine inlet ( 12 ) and a turbine outlet ( 14 ), and a compressor chamber ( 6 ) having a compressor inlet ( 17 ) and a compressor outlet ( 18 ), and with a rotor ( 8 ) having a turbine wheel ( 10 ) arranged in the turbine chamber ( 5 ) and a compressor wheel ( 11 ) arranged in the compressor chamber ( 6 ), the method including the step of driving the rotor ( 8 ) by means of charge air supplied to the turbine inlet ( 12 ), wherein the compressed air exiting at the compressor outlet ( 18 ) is directed to a turbine auxiliary inlet ( 15 ) which opens downstream from the turbine inlet ( 12 ) into the turbine chamber ( 5 ) at a site where the pressure in a driven condition of the turbine ( 2 ) is lower than the pressure of the air compressed by the turbo compressor ( 3 ). 
     
     
         2 . A device for driving a turbocharger ( 1 ) comprising a turbine ( 2 ) and a turbo compressor ( 3 ), with a housing ( 4 ) which includes a turbine chamber ( 5 ) having a turbine inlet ( 12 ) and a turbine outlet ( 14 ), and a compressor chamber ( 6 ) having a compressor inlet ( 17 ) and a compressor outlet ( 18 ), with a rotor ( 8 ) having a turbine wheel ( 10 ) arranged in the turbine chamber ( 5 ) and a compressor wheel ( 11 ) arranged in the compressor chamber ( 6 ), and with a source of charge air adapted to be coupled to the turbine inlet ( 12 ), comprising a turbine auxiliary inlet ( 15 ) which opens downstream from the turbine inlet ( 12 ) into the turbine chamber ( 5 ) at a site where the pressure in a driven condition of the turbine ( 2 ) is lower than the pressure of the air compressed by the turbo compressor ( 3 ), and by a line ( 20 ) adapted to couple the compressor outlet ( 18 ) to the turbine auxiliary inlet ( 15 ) in order to direct the compressed air exiting at the compressor outlet ( 18 ) into the turbine auxiliary inlet ( 15 ). 
     
     
         3 . The device according to  claim 2 , wherein guide vanes ( 13 ) are arranged in the turbine inlet and/or in the turbine auxiliary inlet. 
     
     
         4 . The device according to  claim 2 , wherein the supply of charge air is controllable by a valve ( 24 ).