Particulate sensor and method for operating a particulate sensor
AssigneeRobert Bosch GmbH
InventorsHarald Guenschel, Uwe Glanz, Stefan Zimmermann, Leonore Schwegler, Juergen Sindel
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Abstract
A sensor for determining the concentration of particulates in gas mixtures is described, a soot sensor in particular, having a ceramic sensor body surrounded by a metallic housing and having a first and a second measuring electrode. In this instance, the first measuring electrode is connected to the metallic housing of the sensor or the metallic housing of the sensor is designed as the first measuring electrode. By additional electrodes on the ceramic body, the sensor is operable also as a lambda sensor.
Claims26
A sensor for determining a concentration of particulates in a gas mixture, comprising:
- a ceramic sensor body surrounded by a metallic housing and having a first measuring electrode and a second measuring electrode, wherein the first measuring electrode is coupled to the metallic housing of the sensor, wherein the ceramic sensor body is surrounded by and spaced from a protecting tube, and wherein the first measuring electrode is formed by the protecting tube.
A method for determining particulates in a gas mixture, the method comprising:
- exposing a sensor having a first and a second measuring electrode to a gas mixture, the sensor including a ceramic sensor body;
- and
- applying a high voltage to the first measuring electrode;
- wherein an electrode coupled thereto is used as the second measuring electrode, wherein the ceramic sensor body is surrounded by and spaced from a protecting tube, and wherein the second measuring electrode is formed by the protecting tube.
A sensor for determining a concentration of particulates in a gas mixture, comprising:
- a ceramic sensor body surrounded by a metallic housing and having a first measuring electrode and a second measuring electrode, wherein the first measuring electrode is mounted on the metallic housing of the sensor, wherein the ceramic sensor body additionally includes a reference electrode, and wherein the first measuring electrode is formed by the protecting tube.
A method for determining particulates in a gas mixture, the method comprising:
- exposing a sensor having a first and a second measuring electrode to a gas mixture;
- and
- applying a high voltage to the first measuring electrode;
- wherein an electrode mounted on the metallic housing is used as the second measuring electrode, wherein the sensor is surrounded by and spaced from a protecting tube, wherein the second measuring electrode is formed by the protecting tube, wherein a high voltage is applied between the first and the second measuring electrodes in a first time period, and a voltage is determined between another measuring electrode and an additionally provided reference electrode in a second time period.
Dependencies are inferred from the claim text.