Patent · US Active

Fault analysis method for a lambda probe

US8386155B2 · kind B2 · utility

1Cited by

9References

21Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

Jia-Xuan Huang · Taipei, TW
Johannes Scheuerer · Taufkirchen, DE
Norbert Sieber · Regensburg, DE

Key dates

Filing date	Jul 21, 2008
Grant date	Feb 26, 2013
Priority date	—
Expiry date	Oct 3, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D41/222
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fault analysis method for a lambda probe of an internal combustion engine, in particular for detecting a heater input, has the following steps: measurement of an air ratio in the exhaust gas of the internal combustion engine by a lambda probe, control of the air ratio in the exhaust gas of the internal combustion engine by a lambda probe by a lambda controller intervention in accordance with the measured air ratio, and evaluation of the lambda controller intervention in order to detect a fault.

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