Method and apparatus for detecting abnormal state in pulse train generating sensor
US4836016A · kind A · utility
8Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1988 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Apr 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an internal combustion engine having a sensor which generates a pulse signal, a time period is measured during which the engine rotational speed is larger than a reference speed, and the time period is reset at every rise or fall of the pulse signal. As a result, when the measured time period is larger than a predetermined time period, an abnormal state signal is generated, thereby detecting an abnormal state of the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.