Bayerische Motoren Werke Aktiengesellschaft

Alfons Brunner

Joachim Froeschl

Hartmut Proebstle

Susanne Woitsch

Guido Boehm

Stefan Kurtz

A vehicle electrical system includes a first partial electrical system having a first energy store of a first nominal voltage level, a second partial electrical system having a second energy store of a second nominal voltage level, and a DC-DC converter between the two partial electrical systems. The first energy store has a housing, which has at least a first tap for the first nominal voltage level, and by which a first DC-DC converter can be electrically supplied. The housing has at least a second tap for the second nominal voltage level, by which the second energy store can be electrically supplied. The housing further includes a voltage conversion unit, by which the voltage of the first nominal voltage level can be converted into voltage of the second nominal voltage level.

Vehicle electrical system

A method for operating a motor vehicle includes receiving measurement signals which include information relating to a temporal current and/or volt profile of an electronic control unit of the motor vehicle. The method also provides vehicle information which includes information relating to a desired state of the electronic control unit. The method also determines a discrepancy between the received measurement signals and the vehicle information provided. If the discrepancy determined is greater than a predefined tolerance value, a manipulated state of the electronic control unit is determined as part of the method.

Method and apparatus for operating a motor vehicle

A vehicle with an internal combustion engine, with a physical onboard power supply system and with at least one electrical energy source, wherein electrical consumers are integrated in the physical onboard power supply system and the physical onboard power supply system comprises a switchable terminal, wherein, when the terminalis actuated and the internal combustion engine is switched off or when the internal combustion engine is running at a low rotational speed, each of the electrical consumers is assignable by a control device to either a first group of electrical consumers or a second group of electrical consumers, an electrical consumer of the first group is at least partly able to be switched on and off by a user, an electrical consumer of the second group cannot be switched by the user, and an electrical consumer which is switched on at least partly can be supplied with electrical power from the at least one electrical energy source.

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Woerth a. d. Isar, Germany

Alfons Brunner