Patent ID: 7152393

Claim:
An arrangement for reducing exhaust gas emissions and utilizing the intake air throttling energy of an internal combustion engine having an intake duct ( 11 ), a first air supply line ( 7 ) for supplying fresh air ( 26 ) from an air filter ( 27 ) to the intake duct ( 11 ), a turbine ( 5 ) arranged in the first air supply line ( 7 ), a compressor ( 1 ) operatively connected to the turbine ( 5 ) for rotation therewith by a shaft ( 2 ), a generator ( 3 ) also connected to the shaft ( 2 ) for rotation with the compressor ( 1 ) and the turbine ( 5 ), an exhaust gas line ( 10 ) connected to the compressor ( 1 ) for admitting exhaust gas to the compressor ( 1 ), the exhaust gas line ( 10 ) including a valve ( 13 ) connected to a second fresh air supply line ( 28 ) extending to the air filter ( 27 ) for supplying fresh air to the exhaust gas line ( 10 , 12 ) and, via the compressor ( 1 ) to the intake duct ( 11 ) together with recirculated exhaust gas, said first fresh air supply line ( 7 ) being so connected to the turbine ( 5 ) that, during engine start up or before a first fuel injection cycle of the internal combustion engine, the fresh air supply to the intake duct ( 11 ) is quantity-controlled by the turbine ( 5 ) whose air flow restriction is controlled by the compressor ( 1 ) and the generator ( 3 ) which are both operatively connected to the turbine ( 5 ) from which, during throttling operation of the engine, energy is withdrawn in a controlled manner by the compressor ( 1 ) and the generator ( 3 ) for controlling the induction air supply to the intake duct ( 11 ) of the internal combustion engine, the second fresh air supply line ( 28 ) supplying fresh air to the compressor ( 1 ) including an actuating valve ( 13 ) for selectively connecting the supply line ( 12 ) to at least one of the fresh air line ( 28 ) for admitting fresh air ( 26 ) to the compressor and the exhaust gas line ( 10 ) for supplying exhaust gas to the compressor ( 1 ).