Patent ID: 7010918

Claim:
An internal combustion engine ( 1 ) with an air intake duct ( 8 ) and an exhaust duct ( 7 ) and with a motor brake, including an exhaust gas turbocharger ( 2 ) having an exhaust gas turbine ( 4 ) disposed in said exhaust duct ( 7 ) and a compressor ( 5 ) disposed in said intake duct ( 8 ), said exhaust gas turbine ( 4 ) including a turbine wheel ( 17 ) and said compressor ( 5 ) including a compressor wheel, both being mounted on a common shaft such that said compressor ( 5 ) is driven by said exhaust gas turbine ( 4 ), said exhaust gas turbine ( 4 ) including a housing ( 16 ) enclosing the turbine wheel ( 17 ) and having at least one inlet flow passage ( 18 , 19 ) with inlet openings ( 20 , 21 ) disposed around the turbine wheel ( 17 ) and an exhaust gas passage ( 11 ) extending axially from said exhaust gas turbine ( 4 ) to a power turbine ( 3 ), which is coupled to said engine ( 1 ) for transferring power thereto, said exhaust gas passage ( 11 ) including bypass openings ( 26 ) and a bypass line ( 13 ) in communication with said by-pass openings ( 26 ) for conducting exhaust gas around said power turbine ( 3 ) and an axial slide member ( 27 ) supported by said exhaust passage ( 11 ) together with a control element ( 10 ), said axial slide member ( 27 ) and said control element ( 10 ) being movable jointly between two end positions, in one of which said axial slide member ( 27 ) covers and blocks said by-pass openings ( 26 ) and said inlet openings ( 20 , 21 ) are uncovered by said control element ( 10 ) so as to reduce the backpressure of the exhaust gas turbine and in the other of which said control element extends over said inlet openings ( 20 , 21 ) during engine power operation for partially closing the turbine inlet openings ( 20 , 21 ) to increase the speed of the exhaust gas flowing onto the turbine wheel ( 17 ) thereby to increase the turbine and compressor speeds and the pressure of the combustion air supplied to the engine, but said bypass openings are uncovered so that the exhaust gas flow can bypass said power turbine ( 3 ).