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Overload protection method for a bus station in a motor vehicle and circuit arrangement for implementing the method

A technology of circuit devices and safety devices, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection devices for automatic disconnection, etc., can solve non-mandatory problems and achieve Effects of reduced power consumption and reduced functional range

Active Publication Date: 2021-03-09
VOLKSWAGEN AG
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  • Overload protection method for a bus station in a motor vehicle and circuit arrangement for implementing the method
  • Overload protection method for a bus station in a motor vehicle and circuit arrangement for implementing the method
  • Overload protection method for a bus station in a motor vehicle and circuit arrangement for implementing the method

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Embodiment Construction

[0037] first reference figure 1 . In this figure, a motor vehicle K is shown, which has a circuit arrangement 1 .

[0038] A bus 10 can be seen in the circuit arrangement 1 , which can be designed, for example, as a CAN or LIN bus.

[0039] Bus stations 11 , 12 and 13 are connected to bus 10 via bus lines 14 . In the exemplary embodiment, the bus stations 11 to 13 are formed as control units, which control the electrical end consumers (electrical components) in the motor vehicle K associated therewith.

[0040] Such end consumers may be, for example, heating and air conditioning systems, seat adjustments, components of restraint systems and / or components of audio systems.

[0041] Thus, the bus station 11 is connected to the component 11-1 via signal and control lines 20, the bus station 12 is connected in the same way to the components 12-1 and 12-2 to be controlled, and the bus station 13 is finally connected to the component 13 to be controlled -1, 13-2 and 13-3 are con...

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Abstract

The invention relates to an overload protection method for a bus station in an automobile and a circuit arrangement for implementing the method. The invention relates to an overload protection method for at least one bus station (11, 12, 13) in a motor vehicle (K), which is connected to the on-board network of the motor vehicle. The electrical decoupling of the bus station from the on-board network can be brought about, if required, by means of at least one fuse (15). The invention proposes to measure the current (I) flowing to the bus station and to transmit the measured current value to at least one first evaluation and communication device (18), which communicates with the bus station or can communicate with the bus station . When a certain first limit value of the measured current value is reached, the first evaluation and communication device causes the bus station to reduce its functional range or its power in a manner that reduces the power consumption of the bus station, at which it can be concluded that The bus station is about to be overloaded or abnormally loaded.

Description

technical field [0001] The invention relates to an overload protection method for at least one bus station in a motor vehicle. The invention also relates to a circuit arrangement for carrying out the method. Background technique [0002] The large number of electrical consumers present in today's automobiles is often powered via the on-board network. As is known, such vehicle networks also have a bus system, which can be designed, for example, as a CAN bus and / or a LIN bus. A plurality of bus stations are connected to the on-board network via bus lines leading to the bus. A bus station in the sense of the present invention is to be understood as an intelligent consumer. It has intelligence itself, eg in the form of a control unit, and at least one component controllable by the intelligence. In this case, the control unit can be installed together with the controllable components in a common housing. However, this is not mandatory. For example, an airbag control unit wi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02B60W50/02
CPCB60W50/02H02H3/087H02H7/22H02H9/02
Inventor M.弗里德里希A.克雷思M.多林
Owner VOLKSWAGEN AG
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