Patent · US Active

Diagnostic device for a multi-voltage vehicle electrical system, a multi-voltage vehicle electrical system, and a method for operating a multi-voltage vehicle electrical system

US9310411B2 · kind B2 · utility

2Cited by

1References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Paul Mehringer · Stuttgart, DE
Marc Eschenhagen · Ludwigsburg, DE
Michael Merkle · Stuttgart, DE

Key dates

Filing date	Sep 4, 2012
Grant date	Apr 12, 2016
Priority date	—
Expiry date	Sep 4, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/006
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A diagnostic device is provided for a multi-voltage electrical system of a motor vehicle which has a first subnetwork acted on by a first voltage and a second subnetwork acted on by a second voltage, the first voltage being higher than the second voltage, and the first and the second subnetwork having a shared ground connection. The diagnostic device includes a second ground connection, a measuring unit configured to measure a current flow via the second ground connection, and a diagnostic unit configured to diagnose a disturbance in the shared ground connection and/or in the second ground connection on the basis of the measured current flow via the second ground connection as a function of at least one operating state of the vehicle electrical system.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.