Onboard network for a vehicle and method for saving energy

• Main Authors: MUELLER WOLFGANG, PRAG CHRISTIAN
• Format: Patent
• Language: English
• Published: 11.08.2015
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL

The invention relates to an onboard network (1) for a vehicle (32), in particular a motor vehicle. The onboard network (1) comprises an electric machine (10) designed for operating in generator mode. The onboard network (1) further comprises a voltage transformer (12) that is at least indirectly connected to the electric machine (10) on the input side and a first energy accumulator (14) connected to the voltage transformer (12) on the output side, in particular an accumulator. The electric machine (10) is designed for the recuperation operation. The voltage transformer (12) is designed to detect or limit a charge state of the first energy accumulator (14) and to regulate the charge state of the first energy accumulator (14) such that the first energy accumulator (14) has a reserve capacity (15) during generator operation, preferably when driving the vehicle in an energy-consuming manner. The voltage transformer (12) is further designed to charge the reserve capacity (15) of the first energy accumulator (14) depending on a recuperation signal (23) received on the input side and representing a recuperation operation of the vehicle (32).