POWER DISTRIBUTION SYSTEM IN A VEHICLE

The apparatus for energy distribution in a motor vehicle includes a vehicle electrical power supply system (11) with a generator (13) regulated by a voltage regulator (21), a battery (12) and consumers and a control arrangement (10) receiving required information from the power supply system for determining control parameters for engine or power supply system components. The control arrangement (10) includes the voltage regulator (21) and a supply system managing device (20). The supply system managing device (20) includes a device (24) for establishing an energy management strategy and a pre-control device (23) for generating a differential output for input to the device (24) according to an actual power and required power with respect to reference voltage. The pre-control device (23) and the device (24) for establishing an energy management strategy cooperate to determine a power supply set voltage (U_s) from the required information. The power supply set voltage (U_s) is compared with a measured actual voltage (U_ist) to produce a comparison results and the voltage regulator (21) regulates the generator according to the comparison result.