METHOD FOR OPERATING A MULTI-VOLTAGE ELECTRICAL SYSTEM OF A MOTOR VEHICLE, A MULTI-VOLTAGE ELECTRICAL SYSTEM AND MEANS FOR IMPLEMENTING THE METHOD

摘要

A multi-voltage electrical system of a motor vehicle includes first and second subsystems operable at operating voltages, where a current is selectively and alternatively feedable from the first subsystem into the second subsystem and from the second subsystem into the first subsystem, and an electrical consumer is coupleable to and decoupleable from the first subsystem. A method for operating the system includes, responsive to a failure or lack of an attenuator, implementing a special operating mode in which negative and positive sudden load variations caused by coupling or decoupling of the electrical consumer is counteracted by, respectively, feeding current from the second subsystem into the first subsystem or vice versa, in each case over a respective feed time period.

主权项

1. A method for operating a multi-voltage electrical system of a motor vehicle, the multi-voltage electrical system including a first subsystem and a second subsystem, a current being selectively and alternatively feedable from the first subsystem into the second subsystem and from the second subsystem into the first subsystem, and an electrical consumer being coupleable to the first subsystem and decoupleable from the first subsystem, the method comprising:
responsive to a failure or lack of an attenuator provided in the first subsystem, implementing in the multi-voltage electrical system a special operating mode, in which a negative sudden load variation caused by a coupling of the electrical consumer to the first subsystem is counteracted by feeding current from the second subsystem into the first subsystem, and a positive sudden load variation caused by a decoupling of the electrical consumer from the first subsystem is counteracted by feeding current from the first subsystem into the second subsystem, in each case over a respective feed time period.