Abstract: A power supply for a motor vehicle includes an additional voltage storage associated with the starter and the starter is separated from the rest of the vehicle supply system during the starting process by a charging/separating module. Since different variables of the vehicle supply system are supplied to this charging/separating module and corresponding measurements and detection take place within this module, the charging/separating module itself switches off or switches over in a manner which is optimally adapted to requirements.Since the voltage storage associated with the starter and the rest of the vehicle supply battery can be operated completely independently from one another, they can be freely selected based on requirements (starting or buffering). A particularly reliable and safe charging of this voltage storage is ensured at a reduced nominal voltage of the voltage storage, also designated as starter storage.

Abstract: The apparatus for charging a battery particularly for a motor vehicle, with a self-exciting generator is provided in which the generator pre-excitation is improved during starting in that an additional relay is triggered via the starter arrangement, which relay connects the battery with the exciting winding via an additional line when starting and improves the pre-excitation. The additional relay contains a delay circuit, so that the pre-excitation is improved via the additional line also some time after the starting process. The additional line or current branch can contain the relay switch of the additional relay, a resistor and a diode connected electrically in series and the battery is connected with the exciting winding of the generator by it when the additional relay is energized. A capacitor can be connected in parallel with the additional relay coil to provide an appropriate time delay.

Abstract: Disclosed is a device for and a method of applying output voltage from a power generator to a heating resistor in a motor vehicle. During the standstill condition of the vehicle the heating resistor is connected directly to the generator and a power supply network connected parallel to the terminals of a battery, is disconnected from the generator. The output voltage of the generator is regulated to increased values to achieve a higher efficiency in the heating resistor. During the travel of the motor vehicle, the heating resistor is connected in series with the power supply network and a regulated voltage from the power generator is applied across the series connection. The output voltage is regulated such that a nominal voltage is maintained at the power supply network. The switchover between the standstill and running operational conditions is provided by two switching devices which are controlled by a control device in dependency on operational conditions of the motor vehicle.