Method for diagnosing an earth fault of a start/stop unit of a motor vehicle
US10215790B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 28, 2015 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Nov 10, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C5/0808
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for diagnosing a ground fault of a start/stop unit of a motor vehicle and a start/stop system implementing the method. The method comprises, in a preliminary phase, providing a driver device with a ground that can be switched between two positions and connecting a ground output of a start/stop device to the switchable ground. When the vehicle is in operation, at the time of a start/stop instruction: reading a first value of the signal at the input of the reading circuit, then temporarily switching the switchable ground from a first position connected to a ground of the vehicle to a second position connected to a ground resistor; reading a second value of the signal received by the reading circuit when the ground is switched to the ground resistor, and comparing the two read values in order to diagnose a short-circuit to ground fault of the start/stop unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.