Patent · US Expired

Method and device for diagnosing the dynamic characteristics of a lambda probe used for the lambda regulation of individual cylinders

US7481104B2 · kind B2 · utility

3Cited by

4References

10Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Eberhard Schnaibel · Hemmingen, DE
Andreas Koring · Ludwigsburg, DE
Ruediger Deibert · Eßlingen, DE
Michael Daetz · Wolfsburg, DE

Key dates

Filing date	Dec 19, 2003
Grant date	Jan 27, 2009
Priority date	—
Expiry date	May 30, 2024

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D41/1495
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for diagnosing the dynamic characteristics of a lambda sensor, which is used at least intermittently for a cylinder-individual lambda closed-loop control, which provides for at least one actuating variable of the lambda closed-loop control to be detected and compared to a specifiable maximum threshold, and, if the maximum threshold is exceeded, the dynamic response of the lambda sensor is deemed insufficient with respect to the usability for the cylinder-individual lambda closed-loop control.

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