Method for line assignment of a short-circuit of a broadband lambda sensor

US11709198B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Stefan Kremer · Leonberg, DE
• Bernhard Ledermann · Weil der Stadt, DE
• Fabian Baumann · Augsburg, DE

Key dates

• Filing date: Aug 31, 2021
• Grant date: Jul 25, 2023
• Expiry date: Sep 18, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/52
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for line assignment of a short-circuit of a broadband lambda sensor having an upper or a lower short-circuit potential, wherein the broadband lambda sensor has a sensor and multiple sensor lines. The method comprises establishing a conductive connection of at least one sensor line of the multiple sensor lines via a limiting resistor to a reference potential; comparing a sensor line potential of at least one sensor line to be checked of the multiple sensor lines to the reference potential or the short-circuit potentials; classifying (105) the at least one sensor line to be checked as not short-circuited with the upper or the lower short-circuit potential if it is established upon the comparison that the at least one sensor line potential is inside the reference potential range or if it is outside the short-circuit potential ranges; and assigning the short-circuit to at least one sensor line not classified as not short-circuited.