Electrical circuit, particularly an electronic power circuit for motor vehicle injection systems, with a function for the detection and diagnosis of faults, and the related method
US5173832A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1989 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Jun 29, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
During the piloting of the load, the current intensity and the voltage present in the load are monitored by the comparison of their values with a current threshold and with a window of permissible voltage values. When the voltage is outside the window of permissible values and/or the current falls below its threshold, a fault message is generated and the nature of the fault (open load, short circuit to earth, short circuit to the supply voltage) is also identified by the emission of a corresponding signal of a diagnostic nature. The identification of the faulty stage or stages is also provided for in the case of a circuit including several stages in parallel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.