Patent · US Active

Method and device for monitoring an exhaust gas probe

US8196460B2 · kind B2 · utility

3Cited by

3References

20Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

Stefan Barnikow · Bad Abbach, DE
Michaela Schneider · Wiesenfelden, DE
Norbert Sieber · Regensburg, DE

Key dates

Filing date	Oct 2, 2007
Grant date	Jun 12, 2012
Priority date	—
Expiry date	Nov 5, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D41/1454
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In relation to a jump (SP_J_LR) from a lean air-to-fuel ratio to a richer air-to-fuel ratio, a measurement signal of the exhaust gas probe is detected after a predetermined lean-to-rich delay (t_R) as a lean-to-rich signal value (SV_LR) and is placed in relation to a lean-to-reference signal value (L_REF). In relation to a jump (SP_J_RL) from a richer air-to-fuel ratio to a leaner air-to-fuel ratio, the procedure is performed equivalently. Depending on the lean-to-rich and lean-to-rich signal value put in relation, either an asymmetrically aged or non-asymmetrically aged exhaust gas probe is detected.

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