Method for monitoring lambda sensors
US5488858A · kind A · utility
18Cited by
16References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Mar 15, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1474
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for monitoring lambda sensors includes ascertaining a reference value from a magnitude of switching times under operating conditions of a lambda regulation cycle, in which a sensor signal changes from a rich value to a lean value or from a lean value to a rich value. A sensor is classified as functioning correctly if the reference value is less than an associated limit value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.