Abstract: In a method for operating a starter of a vehicle, a position of a starter pinion is detected, and an advance of the starter pinion is regulated as a function of the detected position. For example, the advance during the meshing of the starter pinion with a starter ring gear of a drive motor of the vehicle is regulated.

Abstract: A diagnostic device is provided for a multi-voltage electrical system of a motor vehicle which has a first subnetwork acted on by a first voltage and a second subnetwork acted on by a second voltage, the first voltage being higher than the second voltage, and the first and the second subnetwork having a shared ground connection. The diagnostic device includes a second ground connection, a measuring unit configured to measure a current flow via the second ground connection, and a diagnostic unit configured to diagnose a disturbance in the shared ground connection and/or in the second ground connection on the basis of the measured current flow via the second ground connection as a function of at least one operating state of the vehicle electrical system.

Abstract: A method and a circuit system for operating an electric machine are presented. The method is carried out in particular in a starting phase, a current being limited using a controllable resistor, the controllable resistor being implemented by at least one semiconductor switch, which is controlled using a clocked signal, and the signal being set in such a way that in shutdown phases, the at least one semiconductor switch is not completely shut down.

Abstract: A diagnostic device is provided for a multi-voltage electrical system of a motor vehicle which has a first subnetwork acted on by a first voltage and a second subnetwork acted on by a second voltage, the first voltage being higher than the second voltage, and the first and the second subnetwork having a shared ground connection. The diagnostic device includes a second ground connection, a measuring unit configured to measure a current flow via the second ground connection, and a diagnostic unit configured to diagnose a disturbance in the shared ground connection and/or in the second ground connection on the basis of the measured current flow via the second ground connection as a function of at least one operating state of the vehicle electrical system.

Abstract: A method and a circuit system for operating an electric machine are presented. The method is carried out in particular in a starting phase, a current being limited using a controllable resistor, the controllable resistor being implemented by at least one semiconductor switch, which is controlled using a clocked signal, and the signal being set in such a way that in shutdown phases, the at least one semiconductor switch is not completely shut down.

Abstract: An electronic control device for a starter-generator or a starter for an internal combustion engine in a motor vehicle has a control and a circuit configuration that includes a pulse-controlled inverter. The control device includes the pulse-controlled inverter, the corresponding control, and a DC/DC converter in one structural unit.

Abstract: In a method for operating a starter of a vehicle, a position of a starter pinion is detected, and an advance of the starter pinion is regulated as a function of the detected position.

Abstract: An onboard network for a vehicle having a start-stop system includes a central module having a control unit SG and switch elements, the central module including terminals port A, port B, port C, port D, port E, and port F for the connection of further components of the onboard network. A generator of the onboard network is connected to a first terminal port A, a starter is connected to a second terminal port B, at least one energy storage is connected to a third terminal port C, a further energy storage is connected to a fourth terminal port D, and electrical consumers of the onboard network are connected to the fifth terminal port E.

Abstract: A method for determining a battery variable, in particular capacity of battery, with the aid of a state variable and parameter estimator, which calculates from operating variables of battery state variables and parameters of a mathematical energy storage model. Capacity of battery may be determined very accurately when the battery is in operation if it is calculated as a function of at least one capacity-dependent parameter.

Abstract: A method for detecting the state of electrical connection of an energy store, e.g., a battery, to a vehicle's electrical system includes ascertaining operating variables, e.g., battery current IB and generator current IG, essentially in time synchronous fashion. When there is a change in the generator current IG of the generator during a transitional time, the energy store is checked for the value of the battery current IB for the detection of a compensating effect in the form of a current delivery or a current consumption.

Abstract: A method for detecting the state of electrical connection of an energy store, e.g., a battery, to a vehicle's electrical system includes ascertaining operating variables, e.g., battery current IB and generator current IG, essentially in time synchronous fashion. When there is a change in the generator current IG of the generator during a transitional time, the energy store is checked for the value of the battery current IB for the detection of a compensating effect in the form of a current delivery or a current consumption.