Robert Boschgmbh

Alexander Hetznecker

Lothar Diehl

Ralf Schmidt

Henrik Schittenhelm

Enno Baars

Bernhard Kamp

Holger Reinshagen

Johannes Grabis

Thorsten Ochs

Mathias Klenk

Sabine Roesch

Goetz Reinhardt

Andreas Thomae

Ariel Di Miro

Christopher Holzknecht

Henrico Runge

Benjamin Gaertner

Bastian Roetzler

Stefan Heinzelmann

Christoph Zimmermann

Peer Kruse

Thorsten Baunach

Burkhard Michaelis

Olav Harzer

Saskia Koblmiller

Self-diagnosis of a particle sensor may be used for determining a particle content in a gaseous stream. The particle sensor may include at least two interlocking, interdigital electrodes and a heating element. The heating element may be separated from the electrodes by an insulation layer. The particle sensor may be heated in a regeneration phase and a soot load on the particle sensor can thereby be removed. A semiconductive layer may be formed in the insulation layer directly beneath the electrodes by means of external doping or auto-doping. To perform a self-diagnosis, a measurement voltage may be applied at least periodically between the electrodes and a self-diagnostic current may be measured.

Method and device for the self-diagnosis of a particle sensor

A method for operating a particle sensor (). The particle sensor () has at least two inter-digital electrodes () which engage one in the other and to which a sensor voltage U() is applied in order to determine loading of the particle sensor () with soot particles (). A sensor current I() across the electrodes () is measured and evaluated. In order to remove the loading with soot, a heating element () heats the particle sensor () in a regeneration phase. The method characterized in that the sensor current I() is determined, and a shunt diagnosis of the particle sensor () is carried out in accordance with the measured sensor current I().

Method and device for operating a particle sensor

A sensor element for determining a gas component or particles in a measuring gas, having a first and a second measuring electrode, the measuring electrodes being developed as interdigital electrodes having a row of intermeshing branches as well as a main conductor each, to which the branches are connected in an electrically conducting manner; and the branches of the interdigital electrodes being aligned essentially in parallel to a longitudinal axis of the sensor element.

Sensor element of a gas sensor

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Karlsruhe, Germany

Alexander Hetznecker