Abstract: A motor vehicle having a jump-start device is equipped with an internal combustion engine with a starter motor, and at least two on-board electrical power subsystems which are coupled together via an electric coupling element. Each on-board electrical power subsystem has at least one rechargeable electrical energy storage device. The motor vehicle has a jump-start support terminal, wherein the jump-starting device has a multi-stage jump-start switch. The on-board electrical power subsystems and the jump-starting support terminal are galvanically isolated when a first switching stage of the jump-start switch is selected, and the on-board electrical power subsystems and the jump-starting support terminal are galvanically connected when a second switching stage of the jump-start switch is selected.

Abstract: A jump-starting arrangement is provided for a motor vehicle, wherein the motor vehicle has an engine control unit and a starter for an internal-combustion engine. The motor vehicle is equipped with at least two partial onboard power systems, which are mutually coupled by way of at least one electric separator element. Each partial onboard power system, respectively, is equipped with at least one rechargeable electric energy accumulator. The two partial onboard power systems each have a jump-starting base, and the respective jump-starting bases are galvanically separated from one another.

Abstract: An arrangement and method are provided for stabilizing a voltage applied to a first electric consumer arranged in a vehicle onboard power supply system that includes a second electric consumer. A first voltage supply unit provides a supply voltage; a storage unit stores electric energy; a second voltage supply unit provides a charging voltage; a switching unit is connected to the first consumer, the storage unit, the first voltage supply unit and the second voltage supply unit; and a control unit determines whether a stabilization is to be carried out. If no stabilization is to be carried out, the control unit activates the switching unit such that the first consumer is connected to the first voltage supply unit and, as soon as the stabilization is to be carried out, the first consumer is connected to a series connection formed by the storage unit and the first voltage supply unit.

Abstract: A vehicle is provided with a pinion starter for an internal-combustion engine, which vehicle includes a low-voltage onboard power supply system and a high-voltage onboard power supply system. The pinion starter has an electric motor and a solenoid switch, wherein the electric motor is constructed as a polyphase machine. The polyphase machine can be supplied with electric power from the high-voltage onboard power supply system, and the solenoid switch can be electrically supplied by the low-voltage onboard power supply system.

Abstract: A vehicle energy supply system includes a first branch of the vehicle's electrical system, a second branch of the vehicle's electrical system, and an energy transfer device that couples together the first branch of the vehicle's electrical system and the second branch of the vehicle's electrical system. The energy transfer device is designed in such a manner that energy is drawn from the alternating component of the voltage in the first branch of the vehicle's electrical system by the energy transfer device and is then fed to the second branch of the vehicle's electrical system.

Abstract: A system is provided for supplying voltage to electrical loads in the onboard electrical system of a motor vehicle, in which system the onboard electrical system includes at least two onboard electrical system regions. The first onboard electrical system region has an electric generator, a vehicle battery, and one or more first electrical loads, and the second onboard electrical system region has a double-layer capacitor or a so-called supercap, and one or more second electrical loads. A blocking apparatus, in particular a semiconductor diode or a circuit breaker, is provided between the two onboard electrical system regions. The blocking apparatus permits current to flow from the first onboard electrical system region to the second onboard electrical system region and largely prevents current from flowing in reverse from the second onboard electrical system region to the first onboard electrical system region.

Abstract: An onboard power supply system for a motor vehicle includes a voltage converter and a voltage source which is electrically coupled with the voltage converter and is constructed for providing a predefined source voltage. The onboard power supply system further has a base energy accumulator which is electrically coupled with the voltage converter and is constructed for providing a predefined base voltage. With respect to the amount, the source voltage is greater than the base voltage. The onboard power supply system also has at least one first selection circuit of at least one first electric consuming device which can be electrically coupled parallel to the voltage converter. Furthermore, the onboard power supply system has at least one second selection circuit of at least one second electric consuming device which can be electrically coupled parallel to the base energy accumulator.

Abstract: A motor vehicle includes an on-board vehicle electric system, an electric consumer, whose resistance decreases with the decreasing voltage dropping at the consumer, an electric energy accumulator, and a switching arrangement. The switching arrangement is designed and is connected or connectable to the on-board vehicle electric system, the consumer and the energy accumulator such that in a first switching position, the energy accumulator, and in a second switching position, the switching arrangement, is connected in parallel to the on-board vehicle electric system. The energy accumulator in the second switching position is connected in series to the consumer, and the energy accumulator in the first switching position is not connected in series to the consumer.

Abstract: A multi-voltage vehicle electrical system for a motor vehicle is provided, including at least one multi-voltage generator, a first energy store, whose energy may be fed into a first low-voltage vehicle electrical system branch having low-voltage consumers, and a second energy store, whose energy may be fed into a second high-voltage vehicle electrical system branch having high-voltage consumers, as well as at least one controllable switching device, using which the energy generated by the multi-voltage generator may be distributed to the first and the second vehicle electrical system branches, the first and the second energy stores being connected in series to one another and the first vehicle electrical system branch being connected to a node between the first and the second energy store and to a reference potential of the first energy store.

Abstract: A system and method for supplying voltage to electrical loads in the onboard electrical system of a motor vehicle are provided. The onboard electrical system consists of at least two onboard electrical system regions. The first onboard electrical system region has an electric generator, a vehicle battery, as well as one or more first electrical loads. The second onboard electrical system region has a double-layer capacitor or a so-called supercap and one or more second electrical loads. Between the two onboard electrical system regions, a blocking device is provided, in particular, a semiconductor diode or a power switch, which permits a current flow from the first onboard electrical system region into the second electrical system region and largely prevents a reverse current flow from the second onboard electrical system region into the first onboard electrical system region.

Abstract: A regulating device for a multi-phase voltage converter includes a connecting element for picking-off an input/output voltage signal at a power path of the multi-phase voltage converter, and a filter, which is configured and coupled to the connecting element so as to cause the filter to output a filter output signal, which correlates to the ripple of the input/output voltage signal. A correcting unit is configured and connected to the filter and to the multi-phase voltage converter such that, owing to the correcting unit, an actuating signal is output to the multi-phase voltage converter, which actuating signal generates a change in the ripple of the input/output voltage signal.

Abstract: A vehicle energy supply system includes a first branch of the vehicle's electrical system, a second branch of the vehicle's electrical system, and an energy transfer device that couples together the first branch of the vehicle's electrical system and the second branch of the vehicle's electrical system. The energy transfer device is designed in such a manner that energy is drawn from the alternating component of the voltage in the first branch of the vehicle's electrical system by the energy transfer device and is then fed to the second branch of the vehicle's electrical system.

Abstract: A system is provided for supplying voltage to electrical loads in the on board electrical system of a motor vehicle, in which system the onboard electrical system includes at least two onboard electrical system regions. The first onboard electrical system region has an electric generator, a vehicle battery, and one or more first electrical loads, and the second onboard electrical system region has a double-layer capacitor or a so-called supercap, and one or more second electrical loads. A blocking apparatus, in particular a semiconductor diode or a circuit breaker, is provided between the two onboard electrical system regions. The blocking apparatus permits current to flow from the first onboard electrical system region to the second onboard electrical system region and largely prevents current from flowing in reverse from the second onboard electrical system region to the first onboard electrical system region.

Abstract: A motor vehicle includes an on-board vehicle electric system, an electric consumer, whose resistance decreases with the decreasing voltage dropping at the consumer, an electric energy accumulator, and a switching arrangement. The switching arrangement is designed and is connected or connectable to the on-board vehicle electric system, the consumer and the energy accumulator such that in a first switching position, the energy accumulator, and in a second switching position, the switching arrangement, is connected in parallel to the on-board vehicle electric system. The energy accumulator in the second switching position is connected in series to the consumer, and the energy accumulator in the first switching position is not connected in series to the consumer.

Abstract: A system and method for supplying voltage to electrical loads in the onboard electrical system of a motor vehicle are provided. The onboard electrical system consists of at least two onboard electrical system regions. The first onboard electrical system region has an electric generator, a vehicle battery, as well as one or more first electrical loads. The second onboard electrical system region has a double-layer capacitor or a so-called supercap and one or more second electrical loads. Between the two onboard electrical system regions, a blocking device is provided, in particular, a semiconductor diode or a power switch, which permits a current flow from the first onboard electrical system region into the second electrical system region and largely prevents a reverse current flow from the second onboard electrical system region into the first onboard electrical system region.

Abstract: An energy storage system for a motor vehicle is provided, including an electric machine, which can be operated at least as a generator, for generating a generator current; a vehicle electrical system battery, which is connected to the electric machine in parallel; a capacitor unit, which is connected to the electric machine in parallel; and a controller for controlling the electric machine. The controller is configured such that if the vehicle is in the boost or braking operating mode, the battery of the vehicle electrical system is charged with a maximum battery charging current, whereas in all other cases the battery of the vehicle electrical system is charged by a battery charging current that is adjusted as a function of the charge state of the battery of the vehicle electrical system. Therefore, in order to adjust the battery charging current as a function of the charge state of the battery of the vehicle electrical system, three different charge states are considered.

Abstract: A multi-voltage vehicle electrical system for a motor vehicle is provided, including at least one multi-voltage generator, a first energy store, whose energy may be fed into a first low-voltage vehicle electrical system branch having low-voltage consumers, and a second energy store, whose energy may be fed into a second high-voltage vehicle electrical system branch having high-voltage consumers, as well as at least one controllable switching device, using which the energy generated by the multi-voltage generator may be distributed to the first and the second vehicle electrical system branches, the first and the second energy stores being connected in series to one another and the first vehicle electrical system branch being connected to a node between the first and the second energy store and to a reference potential of the first energy store.

Abstract: An energy storage system for a motor vehicle is provided, including an electric machine, which can be operated at least as a generator, for generating a generator current; a vehicle electrical system battery, which is connected to the electric machine in parallel; a capacitor unit, which is connected to the electric machine in parallel; and a controller for controlling the electric machine. The controller is configured such that if the vehicle is in the boost or braking operating mode, the battery of the vehicle electrical system is charged with a maximum battery charging current, whereas in all other cases the battery of the vehicle electrical system is charged by a battery charging current that is adjusted as a function of the charge state of the battery of the vehicle electrical system. Therefore, in order to adjust the battery charging current as a function of the charge state of the battery of the vehicle electrical system, three different charge states are considered.