| 摘要 |
A sensor device for detecting oxygen concentration at different points of an exhaust system of an internal combustion engine is described, including a first exhaust gas sensor which is situated upstream from a catalytic converter volume and which provides a first signal for a rapid fuel/air ratio control loop of the internal combustion engine and a second exhaust gas sensor which is situated downstream from the catalytic converter volume and which provides a second signal. The device is characterized in that the first exhaust gas sensor as well as the second exhaust gas sensor both have an outer pump electrode, an inner pump electrode, a Nernst electrode, and a reference electrode and that the first exhaust gas sensor is connected to a first operating and analyzing circuit and that the second exhaust gas sensor is connected to a second operating and analyzing circuit, at least the first operating and analyzing circuit or the second operating and analyzing circuit operating the connected first exhaust gas sensor or the second exhaust gas sensor as a Nernst sensor.
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