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AssigneeRobert Bosch GmbH
InventorsAndreas Genssle, Enno Baars, Markus Eitel
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The invention relates to a method for monitoring a sensor unit (20) that is arranged in the exhaust gas region of an internal combustion engine (10). According to the invention, a sensor temperature (31, 32) is directly or indirectly determined by the sensor unit (20), and is compared to an exhaust temperature (33) that is determined by a further sensor unit and/or to model variables and/or to defined threshold values, whereby a dismounting and/or an inappropriate mounting of the sensor unit is indicated. The invention further relates to a device for monitoring a sensor unit (20) arranged in an exhaust region of an internal combustion engine (10), the sensor unit being used to directly or indirectly determine a sensor temperature (31, 32) which can be compared to an exhaust temperature (33) that is determined by a further sensor unit and/or to model variables and/or to defined threshold values in an engine control unit (14), wherein a malfunction entry and/or a warning signal can be derived from said comparison.
A method for monitoring a particulate sensor unit arranged in an exhaust region of an internal combustion engine, the method comprising:
A device for monitoring a particulate sensor unit arranged in an exhaust region of an internal combustion engine, the device including a temperature sensor located inside the particulate sensor unit determines an internal temperature of the particulate sensor unit, which is compared in an engine control with an exhaust gas temperature, wherein a fault and or a warning signal is/are generated based on a difference between the determined internal temperature of the particulate sensor unit and the exhaust gas temperature using at least one of a further sensor unit, modeled variables, and defined threshold values, wherein the particulate sensor unit monitors the discharge of particulates from the internal combustion engine.
Dependencies are inferred from the claim text.