Patent ID: 9347903
Filing Date: 2016-05-24
CPC Classification: G01N

Claim Text:
1. A method for detecting a type of lambda probe having at least two electrodes disposed at least one of on and in a solid electrolyte, of which at least one electrode is separated from a gas mixture by at least one diffusion barrier, and a pump current being applied to at least one of the electrodes, the method comprising: determining a first internal resistance of the lambda probe between the at least two electrodes at at least one predefined operating temperature of the probe; and determining the type of lambda probe based on a value of the first internal resistance and at least one further variable characterizing the type of lambda probe; wherein an additional pump-current amount is impressed between an outer pump electrode and an inner pump electrode in addition to a regulated pump-current value necessary for the proper operation of the lambda probe, and wherein a probe signal as the result of the additionally impressed pump-current is determined as the at least one further variable characterizing the type of lambda probe.