Turbocharger for an internal combustion engine

Abstract

Abstract In order to rapidly heat a catalytic converter (15) located downstream of a turbocharger (4) to its starting temperature, the turbine (2) of the exhaust gas turbocharger (4) provided with a variable turbine geometry (VTG) for regulating the charging pressure is used to increase the exhaust gas backpressure. After cold starting of the internal combustion engine (1), the cross-section of the exhaust gas line (3) is reduced by means of the VTG, as a result of which the exhaust gas backpressure increases. In order to prevent a fall in engine speed, the mass throughput of the engine is increased which results in an increased energy supply in the exhaust gas. A single actuator (27) for the VTG is subjected after cold starting to a partial vacuum, but in normal operation of the internal combustion engine to an excess pressure. <IMAGE>

Inventors

• 👤 Claus Bruestle
• 👤 Friedrich-Wilhelm Kaiser

Bibliographic Details