Patent ID: 6895753
Filing Date: 2005-05-24
Classification: F01D,F02B,F02D,F05D,Y02T

Abstract:
1. An apparatus for supplying sealing air to an exhaust turbine ( 15 ), said exhaust turbine ( 15 ) which interacts with an internal combustion engine for turbo-compound operation in a vehicle, exhaust gases from the internal combustion engine being received in an exhaust system having a supercharger turbine ( 11 ), which drives a compressor ( 13 ) for the engine combustion air, residual energy in the exhaust gas flow being recovered via the exhaust turbine ( 15 ) for transfer to the crankshaft of the internal combustion engine, the exhaust turbine ( 15 ) being supported in a bearing housing ( 32 ), which is fed with sealing air via a fluid line ( 36 ), and the exhaust system comprising an exhaust brake throttle ( 16 ) having an exhaust gas pressure regulator ( 22 ) for regulating the exhaust brake pressure, the exhaust gas pressure regulator ( 22 ) is connected via a compressed air line ( 28 ) to a compressed air source ( 29 , 30 ) connectable in parallel to the bearing housing ( 32 ) via a prioritizing valve ( 35 ) and a compressed air line ( 36 ).