Patent ID: 6378307
Filing Date: 2002-04-30
Classification: F02B,F02M,Y02T

Abstract:
Internal combustion engine with an exhaust gas turbocharger, which comprises an exhaust gas turbine and a compressor for generating compressed boost air, having an additional, air-driven turbine, which is torsionally connected to the compressor and to which combustion air can be supplied via an adjustable shut-off element, a turbine outlet of the air-driven turbine being connected by a connecting duct to the induction path downstream of the compressor and having a closed-loop and open-chain control unit for generating setting signals which adjust the shut-off element,wherein an additional duct is provided between the compressor inlet or a line section opening into the compressor inlet and the air inlet of the air-driven turbine, wherein the air supply in the additional duct and in the compressor inlet can be adjusted by the shut-off element, and wherein in a lower load range, in a case where required boost pressure falls below a threshold value, a setting signal is generated in the closed-loop and open-chain control unit, which setting signal adjusts the shut-off element into a position opening the additional duct and reducing the air supply to the compressor inlet.