High voltage fault discrimination for EGR temperature sensor
US6434476B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 2000 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Oct 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Systems and methods for discriminating between an EGR temperature sensor fault and actual EGR temperatures which produce similar signals includes suppressing high voltage faults for a calibratible period of time after the engine is started. Alternatively, or in addition, a sensor fault is not indicated unless secondary indicators suggest that EGR temperature is sufficiently different from the EGR temperature corresponding to the sensor signal. Secondary indicators may include signals provided by various other engine and/or vehicle sensors such as an ambient air temperature sensor, engine coolant temperature sensor, oil temperature sensor, or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.