Method and device for adjustment of a fuel/air ratio for an internal combustion engine

摘要

In a method for adjusting the fuel/air ratio in an internal combustion engine ( 1 ) comprising a converter ( 2 ) which is associated therewith, a composition of waste gas in the waste gas wing ( 3, 8 ) of the internal combustion engine ( 1 ) is detected by means of sensors ( 4, 5 ) and output signals from at least one of the sensors ( 4, 5 ) are used for producing a control signal in order to influence the fuel/air ratio. The fuel/air ratio is switched back and forth between a lean operating state with surplus oxygen and a rich operating state with an oxygen deficit by means of a characteristic line of the control signal. The characteristic line of the control signal is adapted to a current converter state. A characteristic curve contour of the characteristic line is adjusted according to the addition and/or desorption of an oxidation agent in the converter ( 2 ). The invention also relates to a device for carrying out said method.