Patent · US Active

Procedure and device for diagnosing an exhaust gas probe

US8245566B2 · kind B2 · utility

14Cited by

7References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Kersten Wehmeier · Ludwigsburg, DE
Ronaldi Rusli · Ditzingen, DE
Andreas Koring · Ludwigsburg, DE
Richard Hotzel · Stuttgart, DE

Key dates

Filing date	Oct 1, 2009
Grant date	Aug 21, 2012
Priority date	—
Expiry date	Dec 14, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2041/1432
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A procedure and device for diagnosing the increasing speed and the dead time of an exhaust gas probe includes carrying out the diagnosis by comparing a modeled and a measured signal after a default change of a fuel air ratio of an air fuel mixture that is supplied to a combustion engine. The signal is an output signal of the exhaust gas probe or a modeled or measured signal that is derived from the output signal. The device for diagnosing the velocity and the dead time of an exhaust gas probe also includes a comparing unit for comparing the modeled signal with the measured signal for diagnosing the velocity and the dead time of the exhaust gas probe after a default change of a fuel air ratio of an air fuel mixture that is supplied to the combustion engine.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.