Procedure for operating a particle sensor that is arranged downstream after a particle filter and device for implementing this procedure

US7963143B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Thomas Baumann · Wettingen, CH
• Enno Baars · Leonberg, DE
• Harald Koehnlein · Radolfzell, DE
• Herbert Schumacher · Gerlingen, DE
• Bernhard Kamp · Ludwigsburg, DE

Key dates

• Filing date: May 14, 2008
• Grant date: Jun 21, 2011
• Expiry date: Sep 21, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A procedure for operating a particle sensor that is arranged downstream after a particle filter, at which an ash contamination can occur, and a device for implementing the procedure, are suggested. A remaining operating time determination determines the remaining operating time of the particle sensor related to an ash contamination. Alternatively or additionally the remaining operating time determination provides a correction signal, with which the sensitivity loss of the particle sensor caused by the ash contamination can be considered.