COMPONENT FOR A VEHICLE

Description

[0001] The present invention relates to a system for transmitting information in a component of a vehicle.

[0002] It is known from the prior art that vehicle components are supplied with power via an electrical supply line by vehicle electronics, whereby this electrical supply line is simultaneously used for data transmission. Such data transmission occurs, for example, using power line communication. This allows the supply line to be used simultaneously as a data line in a space-saving and cost-effective manner. Corresponding prior art is known from US 6 744 820 B1, US 2006 / 187 015 A1, US 2014 / 015 408 A1, EP 3 094 008 A1, and the publication: Schaerer, Thomas "The transistor-LED constant current source with one or two transistors and constant current source with bandgap and opamp" (July 3, 2015, XP055908455).

[0003] However, it has been shown that the electrical signals transmitted via the power line can be affected by fluctuations. For example, the vehicle's electronics use the vehicle's battery voltage for power supply, which can cause these fluctuations. Fluctuations, such as the signal voltage level, can impair data transmission. Measures to improve stability (e.g., the voltage level) can be technically complex and therefore costly.

[0004] It is therefore an object of the present invention to at least partially remedy the disadvantages described above. In particular, the present invention aims to provide an improved and more reliable information transmission and / or a cost-effective solution.

[0005] The above object is achieved by a system having the features of the independent system claim. Further features and details of the invention emerge from the respective subclaims, the description, and the drawings. Features and details described in connection with the component not falling within the scope of protection naturally also apply in connection with the system according to the invention and the method not falling within the scope of protection, and vice versa, so that reciprocal reference is or can always be made to the individual aspects with regard to the disclosure.

[0006] According to the invention, the system comprises a component for a vehicle. It is also advantageous if the vehicle is designed as a motor vehicle, in particular as a hybrid vehicle or as an electric vehicle, preferably with a high-voltage electrical system and / or an electric motor. Furthermore, it may be possible for the vehicle to be designed as a fuel cell vehicle and / or passenger vehicle and / or a semi-autonomous or autonomous vehicle.

[0007] Advantageously, the vehicle has a security system that enables authentication, for example, through communication (i.e., in particular, unidirectional or bidirectional information transmission) with an identification transmitter (ID transmitter). Depending on the communication and / or authentication, at least one function of the vehicle can be activated. If authentication of the ID transmitter is necessary for this purpose, the function can be a security-relevant function, such as unlocking the vehicle or authorizing an engine start. Thus, the security system can also be designed as a passive access system that initiates authentication and / or activation of the function upon detection of the ID transmitter approaching the vehicle without active manual actuation of the ID transmitter.For example, the security system repeatedly sends a wake-up signal, which can be received by the ID transmitter upon approach, and then triggers authentication. The function can also involve activating vehicle lights and / or operating (opening and / or closing) a hatch (e.g., the front, rear, or side hatch or door). For example, the vehicle lights are automatically activated upon detection of approach, and / or the hatch is automatically activated upon detection of a user gesture.

[0008] Advantageously, the component has the following electrical and / or electronic structures: an electrical (i.e. electrically conductive) supply line to provide a power supply for the component via vehicle-side electronics (for example a control unit), a circuit arrangement for information transmission, in particular data transmission with and / or to the vehicle-side electronics (i.e. vehicle electronics) via the supply line by changing an electrical parameter of the power supply, a modulation unit for providing the change by impressing (in particular setting and / or forcing) a defined value for the parameter.

[0009] This has the advantage that the component itself can ensure, in a technically simple manner, that the parameter is set to the defined value in a stable (and repeatable) manner for information transmission. While conventional solutions rely on stabilizing the power supply through the vehicle electronics, the present invention allows stabilization to be reduced (only) for information transmission, or rather, to the information transmission, and enabled by the component.

[0010] The supply line can, for example, be designed for power-line data transmission. This makes it possible for the vehicle electronics to provide power-line data transmission. For this purpose, the vehicle electronics can also provide a bus system for this data transmission, so that the supply line can be designed as a bus system transmission line.

[0011] It may be possible for the information transfer to be implemented as communication for the authentication of an ID transmitter by the vehicle. For example, data is transmitted from the ID transmitter (e.g. contactless) to the component, and then modulated via the supply line and / or the power supply, from the component to the vehicle-mounted electronics. For example, the vehicle-mounted electronics serve to provide the security system and / or compare the transmitted information with a specification (such as a secret code). If a match is found through the comparison, a safety-relevant function of the vehicle can be activated, for example. The information transfer is therefore in particular an electronic data transmission for transmitting data from the component to the vehicle-mounted electronics.Alternatively or additionally, the transmitted information can also be used to detect proximity or actuation of the component.

[0012] Advantageously, only the supply line is used for information transmission, thus dispensing with the need for a separate data line. This also means that a maximum of two electrical lines (the supply line and a ground line) are used for information transmission, whereby, if necessary, only these lead from the vehicle-side electronics to the component. The component can also be connected to a maximum of two electrical lines. Each of the electrical lines can be designed to provide a maximum of a single current path (or current branch) and therefore, for example, cannot have multiple conductors to provide different current transmissions. This must be distinguished from, for example, the possible design of the respective line as a stranded wire, in which multiple individual wires are designed to provide a single current transmission.

[0013] The supply line is, for example, primarily designed to supply energy, possibly in conjunction with a ground line (which, for example, always has a ground potential). Fluctuations in the battery voltage used by the vehicle for the energy supply can occur. For example, maximum deviations in a voltage value of the energy supply in the range of 0.01 V (volts) to 10 V, in particular 0.1 V to 8 V, preferably 0.2 V to 3 V, more preferably 0.4 V to 1 V are conceivable. The possible lack of stabilization, or only minimal stabilization, has the advantage that the technical effort required to provide stabilization for the energy supply can be reduced. Even if this is unproblematic for the energy supply, there may be disadvantages with regard to information transmission. Therefore, further measures are taken according to the invention, such as the use of the modulation unit.

[0014] It can be advantageous if, within the scope of the invention, the modulation unit is designed to pull, in particular set, an amplitude, preferably an electrical current of the power supply, to the defined value for impressing, wherein the current strength is preferably the parameter. For this purpose, the modulation unit can be designed, for example, as an electronic switching unit which closes a current branch to a current sink. The defined value is preferably determined by the current sink. The defined value can, for example, be actively impressed, advantageously by an electrical source of the current sink. In this way, it can be ensured that the change for information transmission always occurs in a predefined manner. This can also simplify evaluation of the change, for example by the vehicle's electronics.The evaluation serves, for example, to determine the transmitted information in order to perform authentication and / or activate a vehicle function (such as unlocking or opening a door). A current sink is designed, for example, as a circuit that consumes current in a defined manner.

[0015] Furthermore, it is conceivable within the scope of the invention for the modulation unit to have an electronic switching unit which, in a closed switching state, connects the supply line to a current sink, in particular a constant current sink, in order to preferably draw an electrical current strength of the energy supply as the parameter constant and / or stable to the defined value for impressing. The (constant) current sink can be designed as an electrical or electronic arrangement, preferably with at least one resistor. The arrangement can, for example, allow and / or absorb an electrical current with a constant and / or stable current strength and / or force it through the resistor, so that, in particular regardless of fluctuations in the energy supply, the same current or a current with the same current strength always flows through the resistor and / or is absorbed by the current sink.The resistance is, for example, an impedance, a linear ohmic resistor, a wire resistor, or the like. Advantageously, the current sink can provide a very stable modulation current independent of the power supply voltage. The modulation current is, in particular, a supply signal modified for information transmission, which is provided on the supply line.

[0016] Advantageously, the modulation unit can be part of a switchable current sink, in particular a constant current sink, in order to generate at least one pulse for information transmission, preferably data transmission, on the supply line. This has the advantage that detection by the vehicle's electronics, in particular by a vehicle control unit, is easier. This may be related to the fact that the current sink can at least reduce deviations in the pulse amplitude and / or pulse width caused by fluctuations in the power supply.

[0017] It may also be possible for the impressed value to be defined by at least one electrical source and / or at least one resistor, which are electrically connected to the modulation unit. In particular, the value of the resistor and / or the voltage level provided by the source can define the value that is impressed. This definition can also depend on a voltage threshold, which is used when evaluating a power supply signal by the vehicle's electronics. This enables more reliable information transmission.

[0018] It is furthermore advantageous if a switchable current sink is provided within the scope of the invention, wherein the current sink is formed at least by the modulation unit, and in particular by an electrical source connected thereto, preferably a current source or voltage source, in order in particular to provide the impression as a function of a switching state of the modulation unit. The modulation unit can be designed, for example, as a transistor, in particular a field-effect transistor, preferably a metal-oxide-semiconductor field-effect transistor. Thus, the modulation unit can be designed as an electronic switching unit which can be controlled and switched by an electrical signal. The electrical signal for switching, i.e. the input signal or switching signal, can be output, for example, by electronics of the component. For this purpose, this electronics has, for example, an integrated circuit, such as a microcontroller.In particular, the control signal is activated in such a way that the modulation unit switches depending on the information to be transmitted. In other words, the defined value is also memorized depending on the information, so that the information can be captured by the vehicle's electronics based on this change.

[0019] It may be possible for the defined value (which is impressed) to have a maximum deviation in the range of 0.001 V to 2.0 V, preferably 0.1 V to 1.0 V, preferably 0.2 V to 0.5 V. In this way, the accuracy of the information acquisition by the vehicle-side electronics can be increased.

[0020] According to the invention, it is provided that a switchable current sink for impressing is designed in that the modulation unit connects the supply line to a resistor (in particular a resistance element), wherein preferably an (electrical) source is electrically connected to the resistor in a mesh in order to provide a constant electrical current flow through the resistor. In other words, the source is connected to the resistor in such a way that a current flow through the resistor can be controlled and / or predetermined. The resistor is designed, for example, as a line resistor or as a discrete component, and can in particular also be designed as part of an impedance. It is also conceivable for the resistor to be designed as an SMD component.

[0021] It may also be possible for the electrical parameter to be a current intensity of the power supply, wherein the modulation unit is designed to impress, in particular predetermine, an electrical current with the defined value in the supply line, preferably by means of a constant current source for supplying a constant and / or stable electrical current. In other words, the constant current source can, if necessary, cause the impression of the defined value and / or influence the specific value in order to ensure reliable information transmission.

[0022] In a further embodiment, the circuit arrangement may incorporate a modulation device to modulate an electrical signal from the power supply conducted through the supply line based on the information to be transmitted. Preferably, the modulation is achieved by repeatedly imprinting the defined value. For example, the modulation may be pulse modulation, frequency modulation, and / or amplitude modulation. This makes it possible to transmit information over the same electrical line that also serves for the power supply.

[0023] A further advantage within the scope of the invention can be achieved if the circuit arrangement is designed to generate a pulse in response to an electrical signal (supply signal) from the supply line by switching the modulation unit, in particular from an open to a closed switching state, in order to carry out the information transmission, in particular by evaluating the pulse by the vehicle-side electronics. Switching between the open and closed switching states is carried out in particular by an input signal from the modulation unit. In the open switching state, for example, an electrical resistance of the modulation unit can be increased and in the closed switching state can be reduced. In this way, the modulation unit can also be designed to switch an electrical current. This switching can significantly influence the information transmission.

[0024] According to the invention, a system, preferably a door handle system, for a vehicle is provided, comprising: a component of the vehicle, which is preferably designed as a module so as to be individually mountable, vehicle-mounted electronics which are connected to a (rechargeable) vehicle battery for providing a power supply, in particular electrically, an electrical supply line of the component which is connected to the vehicle-mounted electronics, in particular electrically, for providing the power supply for the component, a circuit arrangement of the component for transmitting information to the vehicle-mounted electronics via the supply line by changing an electrical parameter of the power supply, a modulation unit of the circuit arrangement for providing the change by impressing a defined value for the parameter.

[0025] Thus, the system according to the invention provides the same advantages as those described in detail with reference to a component described above. Furthermore, the component of the system according to the invention can be designed as a component described above.

[0026] According to the invention, the vehicle-mounted electronics are designed to evaluate a supply signal from the power supply based on a voltage threshold in order to receive (detect) the transmitted information, preferably to detect pulses in the supply signal that are modulated by the modulation unit. For this purpose, the supply signal can, for example, be repeatedly electronically compared with the voltage threshold in order to detect the pulse when the voltage value of the supply signal falls below a certain threshold. At the same time, the supply signal can continue to serve to supply power and, in particular, to transmit power to the component.

[0027] According to a further possibility, the vehicle-mounted electronics can be designed to detect a voltage drop in the power supply for information transmission in order to use the voltage drop to detect a pulse specific to the imprinting process. The pulse can be specific to the imprinting process, for example, in that the imprinting process causes the voltage to drop from an original value to the defined value. This increases the reliability of the information transmission.

[0028] Optionally, it is conceivable that the vehicle-mounted electronics are designed to provide the power supply by transmitting a (particularly single) electrical supply signal via the supply line, wherein, in particular, this supply signal is provided in a pulse-modulated manner for information transmission, and / or, for example, a pulse amplitude of the pulses is determined by the impressed, defined value. Thus, stabilizing the pulse amplitude by the component, in particular by a switchable current sink, can improve information transmission. In particular, the circuit arrangement serves to provide a carrier frequency system for information transmission.

[0029] For example, the vehicle-mounted electronics may be configured to provide the power supply by transmitting an electrical supply signal, wherein the electrical parameter is preferably an electrical current or voltage of the supply signal. This makes it possible to ensure a reliable power supply.

[0030] In a further embodiment, the power supply may be dependent on a supply voltage of a vehicle electrical system and / or the vehicle battery, such that the electrical parameter exhibits fluctuations that are significant for information transmission, in particular for a pulse width and / or pulse amplitude of modulated pulses. In particular, the fluctuations may be significant in that they impair information transmission, since the acquisition of information by the vehicle-side electronics may depend on a voltage and / or current level of the supply signal of the power supply. However, it may be advantageous to tolerate the fluctuations for the power supply, as this eliminates the need for complex voltage stabilization for the power supply.

[0031] A further advantage within the scope of the invention can be achieved if the component is designed as a door handle, preferably an exterior vehicle door handle, or as an exterior mirror or as a sill or as a bumper or the like, and the vehicle-side electronics are designed as a control unit for the component - such as the door handle. For example, the control unit can be provided in the vehicle interior and connected to the component, such as the door handle, by the supply line and / or a ground line. This can in particular be a detachable connection, for example a plug-in connection. This enables simplified assembly. It can also be possible for the connection to have at least one fastening means, such as a locking means or screws.

[0032] The scope of the invention does not include a method for transmitting information in a component of a vehicle.

[0033] Advantageously, in such a method, at least one of the following steps can be carried out, in particular automatically, wherein the steps are preferably carried out successively in the specified order or in any desired order, and if necessary, individual steps can also be repeated: Providing a power supply for the component, transmitting information about the power supply by controlling, in particular switching, a modulation unit of the component so that an electrical parameter of the power supply is changed depending on the information, wherein the change is effected by impressing a defined value for the parameter.

[0034] The method thus provides the same advantages as those described in detail with reference to a component and / or a system according to the invention. Furthermore, the method may be suitable for operating a component and / or a system according to the invention.

[0035] Advantageously, the invention can provide that the information comprises at least one of the following information: Information about an approach of an object to the component, preferably from a proximity sensor of the component, information about an authentication of an ID transmitter, preferably received from a receiving unit of the component, information about an actuation of the component, preferably for unlocking and / or opening a door of the vehicle.

[0036] For example, the information can be used to activate at least one function of the vehicle. This enables versatile use of the component in the vehicle.

[0037] The energy supply can, for example, be used to electrically operate the (or all) electronics of the component, i.e. primarily as useful energy and / or only secondarily for data transmission, preferably only unidirectionally from the component to the vehicle electronics.

[0038] Further advantages, features, and details of the invention will become apparent from the following description, in which exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description may be essential to the invention individually or in any combination. Examples include: Fig. 1 is a schematic side view of a vehicle, Fig. 2 is a schematic representation of a circuit diagram of a component and of further parts of a system according to the invention, Fig. 3 is a schematic representation of a supply signal as a function of an input signal.

[0039] In the following figures, identical reference numerals are used for the same technical features, even in different embodiments.

[0040] In Fig. 1 Shown is a system 100 for a vehicle 1, comprising a component 2 of the vehicle and vehicle-mounted electronics 20, which are connected to a vehicle battery 3 for providing a power supply. The component 2 is designed, for example, as a door handle, preferably an exterior vehicle door handle, and the vehicle-mounted electronics 20 are designed as a control unit 20 for the door handle 2.

[0041] The vehicle-mounted electronics 20 can be designed to provide the power supply by transmitting, in particular, a single electrical supply signal V via the supply line 30, wherein this supply signal V can be additionally provided in a modulated manner for information transmission. In this way, the supply line can simultaneously be used for information transmission. The power supply may be dependent on a supply voltage of the vehicle battery 3, so that the power supply exhibits fluctuations that are significant for the information transmission and may therefore potentially impair it.

[0042] It is possible that the information includes at least one of the following information: Information about an approach of an object 6 to the component 2, preferably provided by a proximity sensor 2.1 of the component 2, information about an authentication of an ID transmitter 6, preferably received and then provided by a receiving unit 2.2 of the component 2, information about an actuation of the component, preferably for unlocking and / or opening a door 1.1 of the vehicle 1.

[0043] In Fig. 2A component 2 for a vehicle 1 is shown schematically by means of a basic circuit diagram. An electrical supply line 30 is provided in order to provide a power supply for the component 2 via an on-board electronics system 20. A ground line 31 can also be used for the power supply if necessary. These can be the only lines that connect the component 2 to other parts of the vehicle 1. For this purpose, connection elements such as electrical plug connectors or the like are provided for the component 2. The component 2 can also have a housing that predominantly surrounds the electronics of the component 2. The electronics are, for example, potted, with (for example exclusively) the supply line 30 and in particular the ground line 31 leading out of the potting in order to be electrically connected to the on-board electronics system 20 via the connection elements.For this purpose, the vehicle-side electronics 20 has, for example, a corresponding cable which is connected to the connection elements.

[0044] The electronics of component 2 can have a circuit arrangement 10 for transmitting information to the vehicle-mounted electronics 20 via the supply line 30. For this purpose, a change in an electrical parameter of the power supply can take place, which can be provided by a modulation unit 40 (of the circuit arrangement 10). To provide the change, for example, a defined value for the parameter is impressed. The parameter is in particular an electrical current or an electrical voltage of the power supply, so that the defined value is a specific (predetermined) value for the current or a voltage value. In other words, the modulation unit 40 can be designed to pull an amplitude A, preferably an electrical current I of the power supply, to the defined value for the impression, wherein the current is in particular the parameter.

[0045] The modulation unit 40 can also comprise an electronic switching unit which, in a closed switching state, connects the supply line 30 to a current sink 41, in particular a constant current sink 41, in order to maintain an electrical current intensity of the power supply as the parameter constant at the defined value for impressing. For this purpose, the switching unit is designed, for example, as a transistor or the like.

[0046] As also in Fig. 2As shown, the impressed (defined) value can be defined at least by an electrical source Q, such as a (real) voltage or current source, and / or by at least one resistor R, which are electrically connected to the modulation unit 40. In this way, a switchable current sink 50 can be formed, wherein the current sink 50 is formed at least by the modulation unit 40, and in particular by the electrical source Q connected thereto, in order to provide the impression depending on a switching state of the modulation unit 40. Specifically, a switchable current sink 50 for impression is formed in that the modulation unit 40 connects the supply line 30 to the resistor R, wherein the source Q is electrically connected to the resistor R in a mesh in order to provide a constant electrical current flow through the resistor R.In particular, connecting the source Q in the same mesh as the resistor R can mean that the value can be defined very precisely. In other words, the current flow I can be predetermined, which is made possible by connecting the supply line 30 via the modulation unit 40 and via the resistor R to a ground potential 32. For this purpose, for example, the current through the resistor R is permanently impressed using the source Q. This change due to the impressed current - i.e. the impression of the value for the parameter - can be provided, for example, by switching the modulation unit 40. Switching the modulation unit 40 therefore causes the defined value for the parameter to be impressed, which can also be shown using . Fig. 2The switching occurs, for example, in a closed state of the modulation unit 40, so that a current path between the supply line 30 and the resistor R and / or a ground potential 32 becomes conductive.

[0047] The electrical parameter can be a current intensity of the power supply, wherein the modulation unit 40 is designed to impress an electrical current I with the defined value in the supply line 30 (i.e. to set the current intensity with the value), preferably by means of a constant current source 41 for feeding in a constant electrical current I. Alternatively or additionally, the circuit arrangement 10 can form a modulation device 10 in order to modulate an electrical signal of the power supply conducted through the supply line 30 on the basis of the information to be transmitted, wherein the modulation is carried out by repeatedly impressing the defined value.Furthermore, the circuit arrangement 10 can be designed to generate a pulse in the case of an electrical signal of the supply line 30 by switching the modulation unit 40, in particular from an open to a closed switching state, in order to carry out the information transmission by evaluating the pulse by the vehicle-side electronics 20.

[0048] In Fig. 3Furthermore, a method for transmitting information in a component 2 of a vehicle 1 is at least partially illustrated. In this method, an energy supply for the component 2 can first be provided. The energy supply is provided, for example, by transmitting an electrical supply signal V. In addition, it can be possible for information about the energy supply (by means of the supply signal V) to be transmitted by switching a modulation unit 40 of the component 2. The switching takes place, for example, by an input signal E as a switching signal E for the modulation unit 40. In this case, an electrical parameter of the energy supply can be changed depending on the information and in particular also on the switching signal E, wherein the change takes place by impressing a defined value for the parameter.The change can be seen from the supply signal V shown, which shows a voltage drop with each pulse P.

[0049] The vehicle-mounted electronics 20 can be designed to evaluate the supply signal V of the energy supply based on a voltage threshold S' in order to receive information transmitted to the component 2, preferably in order to detect the pulses P over time t in the supply signal V, which are modulated by the modulation unit 40. The vehicle-mounted electronics 20 can further be designed to detect the voltage drop in the energy supply for information transmission in order to detect the pulse P, which is specific for the impression, based on the voltage drop. Fig. 3It can be seen that fluctuations in the voltage of the supply signal V can influence the detected pulse width B and / or the pulse amplitude A due to the defined threshold S'. In other words, such fluctuations in the energy supply can impair the information transmission. Therefore, by means of the modulation unit 40 and / or the switchable current sink 50, it can be ensured that the voltage drop always occurs in a defined manner and thus the pulse P can be detected more reliably based on the threshold S'. The defined value, which is impressed on the supply signal V for this purpose by the modulation unit 40 and / or the switchable current sink 50, can be determined, for example, as a function of the threshold S' used. Furthermore, the modulation unit 40 can be controlled as a switching unit, for example by a clock generator such as a microcontroller or the like for switching using the input signal E.

[0050] The above explanation of the embodiments describes the present invention exclusively by way of examples. List of reference symbols

[0051] 1Vehicle 2Component, door handle 2.1Proximity sensor 2.2Receiver unit 3Vehicle battery 6Object 10Circuit arrangement, modulation device 20vehicle electronics, control unit 30Supply line 31Ground line 32Ground potential 40Modulation unit, switching unit 41Current sink, constant current sink 50 switchable current sink 100System tTime APulse amplitude BPulse width EInput signal, switching signal for 40 ICurrent PPulse QSource RWesistance S'Threshold VSupply signal

Claims

1. System for a vehicle (1): - a component (2) of the vehicle (1), - vehicle electronics (20), which are connected to a vehicle battery (3) to provide a power supply, - an electrical supply line (30) of the component (2), which is connected to the vehicle electronics (20) to provide the power supply for the component (2), - a circuit arrangement (10) of the component (2) for transmitting information to the vehicle electronics (20) via the supply line (30) by changing an electrical parameter of the power supply, - a modulation unit (40) of the circuit arrangement (10) for providing the change by imprinting a defined value for the parameter, wherein a switchable current sink (50) for impressing is formed in that the modulation unit (40) connects the supply line (30) to a resistor (R), wherein a source (Q) is electrically connected to the resistor (R) in a mesh to provide a constant electrical current flow through the resistor (R), the vehicle electronics (20) being designed to evaluate a supply signal (V) of the power supply on the basis of a voltage threshold in order to receive the transmitted information, in order to detect pulses (P) in the supply signal (V) which are modulated by the modulation unit (40).

2. System according to claim 1, characterized in that the vehicle electronics (20) are designed to detect a voltage drop in the power supply for information transmission in order to detect a pulse (P) which is specific to the imprinting on the basis of the voltage drop.

3. System according to any one of claims 1 to 2, characterized in that the vehicle electronics (20) are designed to provide the power supply by transmitting an electrical supply signal (V) via the supply line (30), this supply signal (V) being modulated, in particular pulse-modulated, preferably provided for information transmission, a pulse amplitude (A) of the pulses (P) being determined by the impressed defined value and in that the vehicle electronics (20) are designed to provide the power supply by transmitting an electrical supply signal (V), the electrical parameter being an electrical current or electrical voltage of the supply signal (V) and in that the power supply is dependent on a supply voltage of the vehicle battery (3), so that the electrical parameter exhibits fluctuations which are significant for the transmission of information, in particular for a pulse width (B) and / or pulse amplitude (A) of modulated pulses (P).

4. System according to any one of claims 1 to 3, characterized in that the component (2) is designed as a door handle, preferably an exterior vehicle door handle, and the vehicle electronics (20) is designed as a control unit (20) for the door handle (2).

5. System according to any of the preceding claims, characterized in that the modulation unit (40) is designed to draw an amplitude (A) to the defined value for imprinting.

6. System according to any of the preceding claims, characterized in that the modulation unit (40) has an electronic switching unit (40) which, in a closed switching state, connects the supply line (30) to a current sink (41) in order to draw an electrical current strength of the power supply as the parameter stably to the defined value for memorization and in that the impressed value is defined by at least one electrical source (Q) and / or by at least one resistor (R), which are electrically connected to the modulation unit (40).

7. System according to any of the preceding claims, characterized in that a switchable current sink (50) is provided, the current sink (50) being formed at least by the modulation unit (40), and in particular by an electrical source (Q), preferably current source (Q), connected thereto, in order to provide the imprinting as a function of a switching state of the modulation unit (40).

8. System according to any of the preceding claims, characterized in that the electrical parameter is a current intensity of the power supply, the modulation unit (40) being designed to inject an electrical current (I) with the defined value into the supply line (30), preferably by means of a constant current source (41) for feeding in a constant electrical current (I).

9. System according to any of the preceding claims, characterized in that the circuit arrangement (10) forms a modulation device (10) for modulating an electrical signal of the power supply conducted through the supply line (30) on the basis of the information to be transmitted, the modulation being effected by repeatedly impressing the defined value and in that the circuit arrangement (10) is designed to generate a pulse at an electrical signal of the supply line (30) by switching the modulation unit (40), in particular from an open to a closed switching state, in order to carry out the information transmission by evaluating the pulse by the vehicle electronics (20).