Method and control unit for monitoring cable faults on a broadband lambda probe
US8773143B2 · kind B2 · utility
5Cited by
1References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 16, 2012 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Jan 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for identifying cable faults at the terminals of a broadband lambda probe comprising a Nernst cell and a pump cell in the exhaust gas duct of an internal combustion engine. The broadband lambda probe has a reference electrode terminal RE, an internal pump electrode terminal IPE and an external pump electrode terminal APE. A pump current is applied to the broadband lambda probe and a pulsed reference pump current is applied to the broadband lambda probe. Cable faults are identified by the evaluation of potential swings in current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.