Trouble detecting apparatus for a sensor in an internal combustion engine system
US4517831A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1983 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Nov 23, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A trouble detecting apparatus for a signal generator for generating a signal whose period changes in accordance with the speed of an internal combustion engine has a detector for detecting whether or not the period of the signal exceeds a predetermined time and a speed detector responsive to the signal for computing the engine speed. The result of the computation in the speed detector just before the period of the signal exceeds the predetermined time is compared with a reference engine speed which is set to a speed at which the engine cannot rotate stably under ordinary conditions, and it is discriminated whether or not the signal generator is defective on the basis of the result of the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.