METHOD FOR DISCHARGE OF ELECTRICAL COMPONENTS OF A MOTOR VEHICLE IN THE EVENT OF AN ACCIDENT

Abstract

The invention relates to a method for load shedding the electrical components of a motor vehicle in the event of an accident, said vehicle comprising a first group of electrical components and a second group of electrical components, said vehicle comprising means for automatically cutting an electrical circuit, characterized in that said method comprises the following steps: a step of detecting (E1) the occurrence of an accident; a step of simultaneous and automatic load shedding (E2) of the first group by said means for automatically cutting an electrical circuit; and a step of activating (E3) the second group. Furthermore, the invention relates to a computer program implementing said method for load shedding electrical components of said motor vehicle in the event of an accident. Abstract figure: Fig. 1

Description

Title of the invention: METHOD FOR DE-LOADING ELECTRICAL COMPONENTS OF A MOTOR VEHICLE IN THE EVENT OF AN ACCIDENT

[0001] The invention relates to the electrical components of motor vehicles, and more particularly to the management of the electrical power supply to these components during an accident.

[0002] Known from the prior art is a patent application WO2023131751 which describes a method for managing the electrical power supply of an electrohydraulic braking system for a motor vehicle comprising at least one piece of electrical equipment. The patent application describes an early load shedding of at least one electrical element in order to guarantee the availability of electrical energy when needed. The load shedding consists of stopping the transmission of electrical energy from a piece of equipment of said motor vehicle. The vehicle comprising an electrical power supply system comprising an electrical switch. The load shedding is implemented by a control unit authorizing the opening of said electrical switch or by sending an instruction to limit the electrical energy consumption of said equipment, or even an instruction to stop the electrical energy consumption corresponding to the stopping of said equipment.The objective of the invention described in the patent application is to have sufficient stored electrical energy to ensure the efficient operation of the braking system. The electrical equipment concerned is thermal delivery equipment or motor-fan unit equipment. However, a drawback remains. Load shedding is anticipated. Thus, the driver and / or passengers of the vehicle are forced to deprive themselves of a function provided by equipment of said vehicle because there is a probability of needing electrical energy from said braking system.

[0003] The objective of the present invention is to remedy these drawbacks by proposing the simultaneous load shedding of equipment not essential to the operation of said vehicle in the event of a need for transmission of electrical energy to essential equipment.

[0004] To achieve this objective, the invention proposes a method for load shedding the electrical components of a motor vehicle in the event of an accident, said vehicle comprising a first group of electrical components and a second group of electrical components, said vehicle comprising means for automatically cutting an electrical circuit, remarkable in that said method comprises the following steps: - a step of detecting the occurrence of an accident; - a step of simultaneous and automatic load shedding of the first group by said means to automatically cut an electrical circuit; - a step of activating the second group.

[0005] Thanks to the invention, the electrical energy is only used for the safety functions of the vehicle in the event of an accident.

[0006] Advantageously, said vehicle comprises at least one airbag, during said detection step, said accident is detected by the inflation of said airbag.

[0007] Airbag inflation is a good indicator of a road accident.

[0008] Advantageously, said vehicle comprises at least one impact sensor, said accident is detected by said impact sensor.

[0009] During a road accident, the vehicle suffers an impact that would be easy to detect using a sensor.

[0010] Preferably, the second group comprises at least one means configured to send at least one piece of data to an emergency service, a means for unlocking the doors, a means for opening the doors, the tailgates and / or the trunk of said vehicle and / or a means for activating the signaling lights of said vehicle.

[0011] These means make it easier for emergency services to work, and therefore increase the chances of success of rescue operations.

[0012] Preferably, said means for opening the doors, tailgates and / or trunk of said vehicle allows opening for 30 minutes.

[0013] Preferably, said means for activating the signal lights allows activation for 30 minutes.

[0014] Advantageously, said vehicle comprising a battery and a generator, said method comprises an additional step of transmitting electrical energy to a braking means, a means of isolating said battery and said generator and / or a means of detecting a polarity reversal of said battery, said additional step being implemented following said activation step.

[0015] Thus, following the warning from the emergency services, the electrical energy is transmitted to means making it possible to avoid worsening the situation of the vehicle and its occupants.

[0016] Advantageously, the first group comprises at least one means for heating the passenger compartment, one means for heating a windshield, one means for heating a seat, one means for heating a steering wheel, one means for heating a rear window, a motor-fan unit and / or an air blower.

[0017] The means described are not useful in the event of an accident.

[0018] Furthermore, the invention relates to a computer program comprising instructions which, when the program is executed by a computer, cause the latter to implement the steps of the method for load shedding of electrical components of a motor vehicle in the event of an accident described above.

[0019] The invention will be further detailed by the description of a non-limiting embodiment, and on the basis of the appended figure illustrating the invention, in which [Fig.l] schematically illustrates, in the form of a flowchart, a method of load shedding electrical components of a motor vehicle in the event of an accident.

[0020] [Fig.l] schematically illustrates, in the form of a flowchart, a method for load-shedding the electrical components of a motor vehicle in the event of an accident. The vehicle comprises an engine, a means for automatically cutting an electrical circuit and a first group of electrical components. The first group comprises electrical components that are not essential to the operation of said vehicle. The operation of the vehicle is defined as its ability to move in space thanks to the operation of its engine. For example, the electrical components linked to the thermal comfort of a driver are not essential to the operation of said vehicle. Preferably, the first group comprises at least one means for heating the passenger compartment, one means for heating a windscreen, one means for heating a seat, one means for heating a steering wheel, one means for heating a rear window, a motor-fan unit and / or an air blower.These are the main components consuming electrical energy, the use of which is not necessary for the driving and / or safety function of said vehicle. In addition, the vehicle comprises a second group of electrical components. The second group comprises safety electrical components. Preferably, the second group comprises at least one means configured to send at least one piece of data to an emergency service, a means for unlocking the doors, a means for opening the doors, tailgates and / or trunk of said vehicle and / or a means for activating the signal lights of said vehicle. The safety means are intended to keep the driver and passengers safe following an accident.The means configured to send at least one piece of data to an emergency service makes it possible to indicate to the emergency service the occurrence of a road accident and to send the location of the vehicle so that the emergency services can intervene quickly. The means for unlocking the doors and the means for opening the doors, tailgates and / or the trunk of said vehicle make it possible to open access to the passenger compartment of said vehicle in order to be able to communicate, and if necessary extract, the driver and passengers from the vehicle. Preferably, said means for opening the doors, tailgates and / or the trunk of said vehicle allows an opening for 30 minutes. Indeed, 30 minutes is a sufficient duration for the emergency service. intervenes. The means for activating the traffic lights makes it possible to warn the drivers of other surrounding vehicles that an accident has occurred in order to avoid the second accident. Advantageously, said means for activating the traffic lights allows activation for 30 minutes. The method comprises three steps. During a detection step E1, the accident of said vehicle is detected. The vehicle comprises at least one airbag and said accident is detected by the inflation of said airbag. The airbag is a flexible membrane comprising a shock sensor capable of generating a chemical reaction responsible for the inflation of the airbag. The inflated airbag cushions the shock for the driver and / or passengers of the vehicle during an accident. In an alternative embodiment, said vehicle comprises a shock sensor and said accident generates a shock which is detected by said shock sensor.During a load shedding step E2, the first group is automatically and simultaneously deactivated by the means for automatically cutting an electrical circuit of said vehicle. Advantageously, the means for automatically cutting an electrical circuit is a circuit breaker. During an activation step E3, the second group is activated. The function of the second group is ensured by the redirection of the electrical energy which was initially intended for the first group. Thus, the electrical energy is not unnecessarily used by the first group, which is not necessary when the vehicle has suffered a road accident. Advantageously, the vehicle comprises a battery and a generator, and the method comprises an additional step of transmitting the electrical energy to a braking means, a means for isolating said battery and / or said generator, and / or a means for detecting a reversal of the polarity of said battery.The additional step is implemented following said activation step E3. Thus, it is ensured that the emergency service has been warned of the occurrence of the accident as soon as possible after the occurrence of the accident. The invention also relates to a computer program comprising instructions which, when said program is executed by a computer, cause the latter to implement said method.

Claims

Claims

1. Method for load shedding electrical components of a motor vehicle in the event of an accident, said vehicle comprising a first group of electrical components and a second group of electrical components, said vehicle comprising means for automatically cutting an electrical circuit, characterized in that said method comprises the following steps: - a step of detecting (El) the occurrence of an accident; - a step of simultaneous and automatic load shedding (E2) of the first group by said means for automatically cutting an electrical circuit; - a step of activating (E3) the second group.

2. Method according to claim 1 characterized in that, said vehicle comprises at least one airbag, during said detection step (El), said accident is detected by the inflation of said airbag.

3. Method according to claim 1 characterized in that, said vehicle comprises at least one impact sensor, said accident is detected by said impact sensor.

4. Method according to any one of claims 1 to 3 characterized in that the second group comprises at least one means configured to send at least one piece of data to an emergency service, a means for unlocking the doors, a means for opening the doors, the tailgates and / or the trunk of said vehicle and / or a means for activating the signaling lights of said vehicle.

5. Method according to claim 4 characterized in that said means for opening the doors, tailgates and / or trunk of said vehicle allows opening for 30 minutes.

6. Method according to claim 4 characterized in that said means for activating the signal lights allows activation for 30 minutes.

7. Method according to any one of claims 1 to 6 characterized in that, said vehicle comprising a battery and a generator, said method comprises an additional step of transmitting electrical energy to a braking means, a means of isolating said battery and said generator and / or a means of detecting a polarity reversal of said battery, said additional step being implemented work following said activation step (E3).

8. Method according to any one of claims 1 to 7, characterized in that the first group comprises at least one means for heating the passenger compartment, one means for heating a windshield, one means for heating a seat, one means for heating a steering wheel, one means for heating a rear window, a motor-fan unit and / or an air blower.

9. Computer program comprising instructions which, when the program is executed by a computer, cause the latter to implement the steps of the method for load shedding electrical components of a motor vehicle in the event of an accident according to any one of claims 1 to 8.

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