Method for operating a dual accumulator vehicle circuit

Abstract

The method involves providing two sub-networks (11,12), two energy storages (15,17), a starter motor (16) that starts an internal combustion engine of a motor vehicle, and a consumer load (18). A voltage of the latter sub-network is enhanced during a time period, in which a generator is not operated or operated immediately before the starting of the internal combustion engine of the motor vehicle. The voltage of the latter sub-network is enhanced by raising an output voltage of a direct current to direct current converter (13).

Description

technical field [0001] The invention relates to a method for operating a dual-energy storage vehicle circuit of a motor vehicle having two partial circuits connected via a DC transformer, and to a corresponding computing unit. Background technique [0002] Motor vehicles with stop-start automatics are known in principle. In conventional systems, as in other motor vehicles, an electrical store is also provided here, which is connected to the motor vehicle's known type of generator ("vehicle generator") and starter motor (“starter”) and electrical loads. The electrical energy store is, for example, a lead-acid battery, which is also referred to as a “vehicle battery” within the scope of this application. [0003] During the starting process of the internal combustion engine, the motor vehicle battery is charged so strongly by the starter that the vehicle electrical system is disturbed. This results in functional limitations for voltage-sensitive loads such as radios or info...

AI Technical Summary

Problems solved by technology

However, such measures are cumbersome and always entail additional costs

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