Patent ID: 8387592

Claim:
A method for operating an internal combustion engine having at least one cylinder, to which an injection valve is assigned for metering the fuel, having an exhaust gas tract, in which an exhaust gas catalytic converter is arranged, a first exhaust gas probe upstream of or in the exhaust gas catalytic converter and a second exhaust gas probe downstream of the exhaust gas catalytic converter, with a lambda controller being provided, the regulating variable of which is determined as a function of a measuring signal of the first exhaust gas probe and the control variable of which acts on a fuel mass to be metered by means of the injection valve, with a trim regulator also being provided, the regulating variable of which is determined as a function of a measuring signal of the second exhaust gas probe and the first control variable of which is determined as a function of a P regulator component of the trim regulator and the second trim control variable of which is determined as a function of an I regulator component of the trim regulator, with the method comprising: as a function of a predetermined evaluation of the first trim control variable, deciding to determine whether an adjustment of the second trim control variable is to take place, implementing an adjustment of the second trim control variable, if it was decided that an adjustment of the second trim control variable is to take place.