| 摘要 |
A motor vehicle electrical system, wherein a control unit senses or detects a start-stop command for the internal combustion engine, wherein when a start-stop command is sensed or detected a switching element is switched into the first switching state and the voltage at the DC/DC output, which is connected to the switching element, is increased by a control unit by means of a control command, wherein a measuring unit senses and evaluates the voltage condition over the switching element, wherein depending upon the evaluation the start-stop command is or is not carried out by a control unit using a control command. Also disclosed is a method for operating a motor vehicle electrical system. |
| 主权项 |
1. A motor vehicle electrical system comprising:
a starter for an internal combustion engine and a first energy store, which starter and first energy store are arranged in a first region of the motor vehicle electrical system; a generator and a second energy store, which generator and second energy store are arranged in a second region of the motor vehicle electrical system; a switching element arranged between the first and the second region of the motor vehicle electrical system, the switching element having at least two switching states, wherein, in a first switching state, current flow is possible only in a direction from the first region to the second region or the current flow is interrupted in both directions, and, in a second switching state, the first and second region are connected-through to one another so that current flow in the direction from the first region to the second region and from the second region to the first region are possible, wherein the switching element is actuated by at least one associated control unit based on a first control signal, wherein the second energy store is connected to the generator via a DC/DC converter, wherein a start/stop command (S-S-B) for the internal combustion engine is detected or identified by the at least one associated control unit, wherein, when a start/stop command is detected or identified, the switching element is switched to the first switching state and the voltage at the DC/DC output, which is connected to the switching element, is increased by the control unit based on a second control command, wherein a measurement unit detects and evaluates the voltage across the switching element, wherein the start/stop command is executed by the at least one associated control unit based on a third control command or is not executed, depending on the evaluation. |
