Robert Boschgmbh

Steve Kautzschmann

Gerd Hartmann

Markus Eitel

Bernhard Kamp

Christian Schulhauser

A method for operating a sensor for detecting particles in a measuring gas. The sensor includes a sensor element including a substrate, and at least one first electrode and at least one second electrode situated on the substrate. The first electrode and the second electrode carry out a current and/or voltage measurement in temporally spaced measuring phases, at least during an interruption of a measuring phase a check being carried out as to whether the interrupted measuring phase is continuable, the interrupted measuring phase being identified as continuable, and the sensor being subsequently switched off, if, after an expected trigger time, a value for a current and/or voltage measurement falls below a threshold value, a regeneration of the sensor element for removing particles from the sensor element being carried out, and the sensor being subsequently switched off, if the value for the current and/or voltage measurement exceeds the threshold value.

Method for operating a sensor for detecting particles in a measuring gas

In a method for diagnosing a particle filter of a motor vehicle a particle sensor which is connected downstream and has a ceramic sensor element is used, wherein, for the particle sensor, regeneration () of the ceramic sensor element is provided by thermal heating to a specific temperature and for a specific time after the start of the motor vehicle. Within the scope of an on-board diagnosis a confirmed diagnosis result is output after a repeated occurrence of a first diagnosis result. In the proposed method reduced regeneration () of the ceramic sensor element takes place after a first diagnosis result ().

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Moeglingen, Germany

Steve Kautzschmann