Patent ID: 9091226
Filing Date: 2015-07-28
Classification: F02D,Y02T

Abstract:
1. A method for adapting a lambda control of an internal combustion engine ( 10 ) including an exhaust gas probe ( 15 ) disposed in an exhaust gas duct ( 18 ) of the internal combustion engine ( 10 ) as part of an exhaust gas monitoring system, wherein an adaptation is carried out on the basis of a comparison between a modeled and a measured signal after a predetermined change in a fuel-air ratio of an air-fuel mixture supplied to said internal combustion engine ( 10 ) has taken place and wherein the measured signal is an actual value of an output signal of the exhaust gas probe ( 15 ) and the modeled signal is a model value which is derived from the air-fuel mixture supplied to said internal combustion engine ( 10 ) using an exhaust gas model, comprising performing an incremental adaptation of the lambda controller parameters of a lambda control, wherein a difference between a maximum gradient according to an amount of the measured air-fuel ratio and a maximum gradient according to an amount for the air-fuel ratio expected from the model is used as a quality criterion.