Patent · US Expired

Method and arrangement for diagnosing an exhaust-gas probe

US6131446A · kind A · utility

16Cited by

8References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Eberhard Schnaibel · Hemmingen, DE
Lothar Raff · Waiblingen, DE
Claus-Peter Pflieger · Leinfelden, DE

Key dates

Filing date	May 27, 1998
Grant date	Oct 17, 2000
Priority date	—
Expiry date	May 27, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention is directed to a method for diagnosing an exhaust-gas probe mounted in the exhaust-gas system of an internal combustion engine for conducting the exhaust gas of the engine. The exhaust-gas probe is mounted downstream of the catalytic converter. The output signal of the exhaust-gas probe is monitored as the output signal changes in response to changes of the concentration of at least one of the components of the exhaust gas. The rate of the change is applied as a criterion as to the state of deterioration of the exhaust-gas probe.

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