Patent ID: 6952640
Filing Date: 2005-10-04
Classification: F02D

Abstract:
1. A method for operating an internal combustion engine having an air system, the method comprising the steps of: computing at least one physical quantity of said air system from several input quantities with the aid of a physical model of said air system wherein said at least one physical quantity is not one of said input quantities; comparing said at least one physical quantity to a measured value for said at least one physical quantity; monitoring one of said input quantities or a model internal quantity of said physical model in dependence upon a deviation between the computed value and said measured value; correcting the monitored input quantity or said monitored model internal quantity in dependence upon said deviation; supplying said computed value and said measured value to a control unit as input quantities; forming a corrective value in said control unit in dependence upon said deviation for the monitored input quantity or the monitored model internal quantity; storing several corrective values in a characteristic field for different operating conditions of said engine; determining a corrective value from said characteristic field in dependence upon the instantaneous operating point of said engine; and, correcting the monitored input quantity or the monitored model internal quantity with said corrective value.