Patent ID: 6968689
Filing Date: 2005-11-29
Classification: F01N,F02B,F02D,Y02T

Abstract:
1. A method for regulating a boost pressure of an internal combustion engine having a multiflow air system which includes a multichannel air supply and a corresponding multichannel exhaust gas discharge, each of the exhaust gas channels having an exhaust gas turbocharger, the method comprising: determining a manipulated variable for implementing a specified boost pressure to be set as a function of an actual exhaust gas back pressure prevailing in a particular one of the exhaust gas channels; determining a total specified exhaust gas back pressure by a first controller from a difference between the specified boost pressure and an actual boost pressure; determining a specified exhaust gas back pressure for the individual exhaust gas channels from the total specified exhaust gas back pressure as a function of a difference between air mass flows supplied via air channels of the engine; and determining a particular manipulated variable for the specified boost pressure to be set by an additional controller from a difference between the specified exhaust gas back pressure and the actual exhaust gas back pressure prevailing in the particular exhaust gas channel.