Failure judgment system for sensors installed in engine
US4780826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1986 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Feb 7, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A sensor failure judgment system includes a plurality of condition sensors and a monitored sensor. A first failure judgment device monitors the condition sensors to determine proper operation thereof. If any condition sensor is not properly operating, its output signal is replaced by a standard value. A second faliure judgment device monitor determines the condition of the monitored sensor based on the output signals of the condition sensors. The monitored sensor is determined as having failed if the output signals of the condition sensors as compared with the output signal of the monitor sensor so indicate. A fail safe device is also provided, which receives the output signals of the condition sensors and determines if any of these output signals are the standard signal. If any of these output signals are the standard signal, the failure judgment is inhibited so that the monitored sensor will not be incorrectly judged as having failed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.