Robert Boschgmbh

Michael Muerken

Nils Draese

Lars Braun

Frederik Tekotte

Manuel Eder

A method for monitoring an on-board power supply of a motor vehicle. A power distributor is provided, via which a supply voltage is supplied to a safety-relevant consumer and via which non-safety-relevant consumers are supplied. A disconnection of consumers takes place if at least one measure of the voltage applied at least to the safety-relevant consumer reaches a limit value. After disconnecting consumers, the measure of the voltage applied to the safety-relevant consumer is ascertained. The measure of the voltage applied to the respective safety-relevant consumer is respectively compared to a further limit value for a sufficient voltage. From the disconnected consumers, at least one consumer to be connected is selected, which is connected if the limit value is respectively reached at the safety-relevant consumers. The consumer to be connected is selected as a function of a connection measure such that the connection measure is not exceeded.

Method for monitoring an on-board power supply of a motor vehicle

A method for securing safety-relevant loads in a motor vehicle, including a main path arranged between a sub-on-board electrical system for a safety-relevant load of a motor vehicle and another sub-on-board electrical system for a non-safety-relevant load. The sub-on-board electrical system for the safety-relevant load is supplied with power by an energy store. The main path includes at least one switch, and at least one detector for detecting a current flowing through the main path. At least one additional path is provided which is connected in parallel with the main path, the additional path having at least one switch. The method includes: opening the main path upon detection of a critical state, i.e., an overcurrent and/or an undervoltage or overvoltage on the sub-on-board electrical system for the safety-relevant load. The additional path is closed or kept closed while the main path is open. The additional path is subsequently reopened.

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Karlsruhe, Germany

Michael Muerken