METHOD FOR CONTROLING AN EXHAUST GAS SENSOR

摘要

A device for controlling an exhaust gas sensor that is alternatively configured as a limiting-current probe or as a two-cell probe. In each case, the probe has a reference cavity made of a ceramic material and a cell made of a material conducting oxygen ions. A controller has one input variable that is a measured sensor voltage dependent on an oxygen concentration in the sealed cell. The other input variable is a reference voltage. The output variable of the controller is a current which is to be applied to the cell and which allows the sensor voltage to be regulated to a predefined value. The device for controlling the limiting-current probe is designed to process the applied current in one of the input variables of the controller.