Patent ID: 7347048

Claim:
An internal combustion engine ( 1 ) comprising an engine compression brake arrangement having at least one throttle valve ( 2 ) per cylinder of the internal combustion engine ( 1 ), said engine including an exhaust gas turbocharger ( 3 ) having an exhaust gas turbine ( 5 ) disposed in an exhaust tract ( 8 ) and a compressor ( 6 ) disposed in an intake tract ( 9 ) of the internal combustion engine ( 1 ), a power turbine ( 4 ) which is driven by the exhaust gas of the internal combustion engine ( 1 ) and is coupled via a transmission ( 10 ) to the internal combustion engine ( 1 ), said power turbine ( 4 ) being disposed in the exhaust gas tract ( 8 ) downstream of the exhaust gas turbine ( 5 ), with a bypass pipe ( 15 ) extending around the power turbine ( 4 ) and a bypass device ( 16 ) disposed in the bypass pipe ( 15 ), the bypass device ( 16 ) being connected also to the power turbine ( 4 ) via an exhaust pipe ( 17 ), the bypass device ( 16 ) being designed in the form of a combined switching and throttle valve for selectively closing the exhaust pipe ( 17 ) and completely or partially closing the bypass pipe ( 15 ) so as to selectively partially or completely block the flow paths from the exhaust pipe ( 17 ) and the bypass pipe ( 15 ) to an exhaust discharge pipe ( 20 ), said throttle valve ( 2 ) being open in the engine braking mode and the exhaust gas turbine ( 5 ) having a variable turbine inlet vane structure ( 11 ) which, in the engine braking mode, changes the flow of the exhaust gas to the turbine in such a manner that the rotational speed of the exhaust gas turbine ( 5 ) is increased at medium to high rotational speeds of the internal combustion engine ( 1 ) and the bypass device ( 16 ) closes the exhaust pipe ( 17 ) and completely opens the bypass pipe ( 15 ).