Method and device for operating a particle sensor

US8640526B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ariel Di Miro · Stuttgart, DE
• Enno Baars · Leonberg, DE
• Johannes Grabis · Renningen, DE
• Alexander Hetznecker · Karlsruhe, DE
• Mathias Klenk · Petershöfe, DE
• Bernhard Kamp · Ludwigsburg, DE
• Bastian Roetzler · Markgröningen, DE
• Henrik Schittenhelm · Stuttgart, DE

Key dates

• Filing date: Jun 29, 2011
• Grant date: Feb 4, 2014
• Expiry date: Aug 1, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2041/2058
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for operating a particle sensor (10). The particle sensor (10) has at least two inter-digital electrodes (12, 13) which engage one in the other and to which a sensor voltage U(IDE) (21) is applied in order to determine loading of the particle sensor (10) with soot particles (16). A sensor current I(IDE) (31) across the electrodes (12, 13) is measured and evaluated. In order to remove the loading with soot, a heating element (14) heats the particle sensor (10) in a regeneration phase. The method characterized in that the sensor current I(IDE) (31) is determined, and a shunt diagnosis of the particle sensor (10) is carried out in accordance with the measured sensor current I(IDE) (31).