| 摘要 |
In a method for checking the lambda value λ indicated by a binary lambda probe, the lambda probe being situated in the exhaust line of an internal combustion engine and provided downstream from a catalyst having oxygen storage capacity, the invention provides that the time progression of the voltage signal Uλ is plotted in the range of the lambda value λactual of 1.0 indicated by the lambda probe until a first inflection point W1 and a second inflection point W2 of the voltage signal Uλ have been detected, the time derivative dUλ/dt of the voltage signal is generated, the jumps S1, S2 in the time derivative dUλ/dt which occur at the inflection points W1, W2 are compared to one another, and based on the comparison of the jumps S1, S2 the indicated lambda value λactual of 1.0 is checked. According to the invention, the actual lambda value λtarget of 1.0 is always maintained in the air/fuel mixture supplied to the internal combustion engine in order to ensure optimal conversion C of pollutants in the exhaust gas from the internal combustion engine.
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