JP6120171B2 - Electronic control unit - Google Patents

Description

  The present invention relates to an electronic control device, and more particularly to an electronic control device that connects a plurality of communication networks and relays communication data between the communication networks.

  An electronic control device (hereinafter also referred to as “ECU (Electronic Control Unit)”) used in a vehicle performs various controls using a microcomputer (hereinafter referred to as “microcomputer”). In such an electronic device, power is continuously supplied to a memory or the like even after the so-called ACC (accessory) power is turned off, that is, after the key is removed. Some microcomputers perform some processing even when the ACC power is off. In this case, the microcomputer is always supplied with the same power as when the ACC power is on.

  Further, in a situation where the vehicle is not used for a long period of time, the power consumption of the battery cannot be ignored even if the current flowing through the electronic device is very small when the ACC power is off. In view of this, a power control device for an in-vehicle electronic device has been devised that detects the off of the ACC power supply that supplies power to the in-vehicle electronic device and reduces the current consumption of the microcomputer based on this detection (Patent Literature). 1).

JP-A-10-175484

  In a gateway device that connects a plurality of communication networks and relays communication data between communication networks, the ECU included in each communication network individually uses a battery power supply voltage or an IG (ignition) power supply voltage. And control of operation (start / stop / restart) based on the monitor result.

  Some ECUs stop operation or shift to a power saving mode (also referred to as a sleep mode) in which the operation of some functions is restricted when the power supply voltage falls below a predetermined value. For this reason, in the same communication network, even if the power supply voltage decreases, an ECU that performs a normal operation and an ECU that stops / limits the operation are mixed.

  A communication network is often formed for each function of a vehicle, such as a traveling system, an engine control system, and a body system. For this reason, if the operation states are mixed as described above, there is a problem that the corresponding function does not operate properly. Further, when some functions normally operate in a situation where the functions do not operate properly, power is consumed wastefully.

  In view of the above problems, an object of the present invention is to provide an electronic control device capable of performing appropriate power management in units of communication networks.

  An electronic control device for solving the above-described problem is for supplying power to a communication unit (20) that communicates with a control device (1 to 7) connected to a communication network (71 to 73) and a control device. Power supply lines (81 to 83) and power supply control units (10, 27) that collectively change the supply state of power to control devices connected to the same communication network.

  With the above configuration, the power consumption and dark current of the entire system are reduced by centrally performing the connection to the power supply and control at the time of instantaneous interruption that have been individually performed by the control equipment (ECU) with one electronic control unit can do. Further, by performing power management in an integrated manner, the power circuit and power control processing of the control device are not required, leading to downsizing and cost reduction of the control device. Furthermore, since the state of each control device can be grasped centrally, power management according to the system status can be performed.

The figure which shows the structural example of a network system. The figure which shows the structure of an electronic control apparatus. The flowchart explaining a power supply control process. The flowchart explaining another example of a power supply control process. The communication sequence diagram between gateway ECU and each communication bus. The communication sequence diagram between gateway ECU and each communication bus (another example).

  Hereinafter, the example which applied the electronic control apparatus of this invention to gateway ECU mounted in the vehicle is demonstrated using drawing. FIG. 1 shows a configuration of a network system NS including a gateway ECU. The network system NS includes communication buses 71 to 73 (communication network of the present invention) connected to the gateway ECU 100 in addition to the gateway ECU 100 (electronic control device of the present invention).

  Although the gateway ECU 200 has the same configuration as the gateway ECU 100, its role will be described later.

  The gateway ECU 100 is a communication interface 20 (communication with a known microcomputer, memory, and peripheral circuit MPU 10 (state acquisition unit of the present invention, power supply control unit), communication bus (generic name of 71 to 73, hereinafter the same)). A communication unit, a status acquisition unit, details of which will be described later, and a protection circuit 31 to be connected between the communication interface 20 and each communication bus (61 to 63) to protect the communication bus from overvoltage or overcurrent. 33, for example, an input / output circuit (I / F) 40 (state acquisition unit of the present invention) for exchanging data with the external device 90, and a switch circuit 50 (details will be described later).

  FIG. 2 shows a detailed configuration of the gateway ECU 100, and details of the communication interface 20 and the switch circuit 50 will be mainly described. The communication interface 20 may be configured as one integrated circuit.

  The power supply circuit 21 is supplied with power from an external power supply (+ B) such as a battery, and supplies power to each part of the communication interface 20. The input / output circuit (I / F) 22 mainly exchanges data with the MPU 10. The transceivers 23 to 25 transmit and receive data to and from each ECU via the communication buses (71 to 73), respectively, check signals flowing through the connected communication bus, and detect a collision. The power supply circuit 26 supplies / shuts off power to the transceiver (generic name for 23 to 25, the same applies hereinafter) based on a command from the control circuit 27 (the power control unit of the present invention). The control circuit 27 controls the entire communication interface 20.

  The switch circuit 50 includes, for example, switches 51 to 53 (may be semiconductor switches) such as relay circuits. One end of the switch (generic name for 51 to 53, hereinafter the same) is connected to the external power supply (+ B), and the other end is connected to the power supply lines 81 to 83. Each of the power lines (a generic name of 81 to 83, the same applies hereinafter) is connected to the ECU of the corresponding communication bus. Then, based on a command from the control circuit 27, the switch is turned on / off to supply / shut off power to the ECU for each communication bus.

  The power supply line may be integrated with the communication bus as in the so-called bus power system.

  Returning to FIG. 1, ECUs 1 and 2 (control devices of the present invention) are connected to the communication bus 71. Examples of these ECUs include a VSC (Vehicle Stability Control) ECU for stabilizing the turning behavior of the vehicle, an air conditioner ECU for controlling air conditioning in the vehicle, and a travel control system ECU such as an engine ECU for engine control. A sensor group and an actuator group necessary for control are also connected to the ECU.

  ECUs 3 to 5 (control devices of the present invention) are connected to the communication bus 72. These ECUs include a seat ECU for adjusting the position or height of the seat, a power window ECU for controlling the opening and closing of the window, an electric mirror ECU for storing and unfolding the electric mirror, and the unlocking / unlocking of the door lock device. An example of the vehicle body ECU is a door lock ECU that locks the vehicle.

  ECUs 6 and 7 (control devices of the present invention) are connected to the communication bus 73. Examples of these ECUs include multimedia devices such as audio devices and navigation devices.

  As described above, it is desirable to connect the ECU to the communication bus for each function of the vehicle. This configuration is “to configure a communication network for each control device that performs a predetermined functional operation”. With this configuration, power management can be performed efficiently for each function (that is, communication network). Further, when there is a function that does not need to be operated according to the surrounding state, the power supply load can be reduced by cutting off the power supply to the corresponding communication network.

  Although the number of transceivers (ie, communication buses) is not limited, it is desirable that there are a plurality of transceivers as shown in FIG.

  For example, a CAN (Control Area Network) protocol is used as the communication protocol. In addition, a known LIN (Local Interconnect Network) protocol or the like may be used.

  With the above-described configuration, the gateway ECU 100 analyzes the packet data received from the communication bus to which the transceiver is connected in the MPU 10 and outputs the packet data to the transceiver to which the communication bus serving as the transfer destination is connected. When the communication protocol of the communication bus is different, the MPU 10 converts the communication protocol into one corresponding to the transfer destination.

  The external device 90 may be either a control device provided in the vehicle and not connected to the communication bus, or a facility (information center, server, etc.) outside the vehicle. The input / output circuit (I / F) 40 includes, for example, a wireless communication unit, and transmits and receives data to and from the external device 90 by wireless communication. The external device 90 and the vehicle (for example, the gateway ECU 100) perform data communication at a predetermined timing. The vehicle state is transmitted from the vehicle, and the external device 90 stores the state of each vehicle.

A power control process executed by the MPU 10 will be described with reference to FIG. First, the surrounding state of the gateway ECU 100 is acquired using at least one of the following (S11).
A state inquiry signal is transmitted from the gateway ECU 100 to each ECU, and a response signal from the ECU is acquired as an ambient state.
-Information regarding the state of each ECU is acquired from the external device 90 as the ambient state.

  The above-described configuration includes “a state acquisition unit (10, 20, 40) that acquires the surrounding state of the electronic control device, and the power supply control unit changes the power supply state based on the surrounding state” It is. More specifically, “the state acquisition unit acquires the operation state of the control device as the surrounding state via the communication unit”. With this configuration, appropriate power management can be performed in communication network units according to the operation state of the control device.

  When an abnormality occurs in the operation of the ECU, data may not be transmitted from the ECU at all (communication interruption), or correct data may not be transmitted (data abnormality, frame error). The presence or absence of an abnormality in the ECU is detected based on the presence or absence of these states.

  When the ECU in which an abnormality has occurred is not detected based on the surrounding state (S12: No), this process ends. On the other hand, when the occurrence of an abnormality in the ECU (in this case, ECU 1) is detected (S12: Yes), a state inquiry signal regarding ECU 1 is transmitted to the other ECUs using at least one of the following. (S13).

A state inquiry signal is transmitted only to the communication bus 71 to which the ECU 1 is connected. When the communication network is configured for each function, it is considered that the ECU 2 (that is, the ECU that has not detected an abnormality among the ECUs connected to the communication bus) performs control based on the state of the ECU 1. It is thought that the state of

  The above configuration is “when a plurality of control devices are connected to the communication network and there is a control device that transmits an operation state including state information that it is desirable to change a power supply state, the state acquisition unit (Same) Acquires supplementary information including the operation state of the control device that transmitted the state information from another control device connected to the communication network, and the power supply control unit changes the power supply state based on the supplementary information. ". With this configuration, by acquiring supplementary information from other control devices on the same communication network, it is possible to confirm whether or not it is really desirable to change the power supply state, and to perform more appropriate power management be able to.

A state inquiry signal is transmitted to the communication buses (72, 73) to which the ECU 1 is not connected. A status inquiry signal may also be transmitted to the communication bus 71. Since there may be an abnormality in the entire communication bus 71 to which the ECU 1 is connected, it is desirable to acquire information from another communication bus.

  The above configuration is “when the electronic control device is connected to a plurality of communication networks and the state of the control device includes state information indicating that it is desirable to change the power supply state. The supplementary information including the operation state of the control device that transmitted the state information is acquired from the control device connected to the communication network to which the control device that transmitted the state information is not connected. The power supply state is changed. " With this configuration, it is possible to confirm whether it is actually desirable to change the power supply state by acquiring supplementary information from control devices on other networks, and to perform more appropriate power management it can.

When a signal indicating that the operation of the ECU 1 is not normal (supplementary information of the present invention) is received from another ECU (2 to 7) as a result of the state inquiry regarding the ECU 1 (S14: Yes), the communication bus 71 including the ECU 1 Information for notifying the interruption of the power supply is transmitted to the ECU connected to (S15). Thereafter, when at least one of the following conditions is satisfied, the process proceeds to step S16.
・ When a predetermined time has passed since the notice information was sent.

At least when a response signal indicating that the advance notice information has been received is received from the ECU 2 (the ECU that has not detected an abnormality among the ECUs connected to the communication bus). This configuration indicates that “the power supply control unit transmits information indicating that the power supply state is changed to the control device connected to the corresponding communication network before changing the power supply state based on the supplementary information. To do. With this configuration, the ECU whose power supply is cut off can store necessary data and prevent the operation from becoming unstable when it is started next time.

  On the other hand, when a signal indicating that the operation of the ECU 1 is not normal (supplementary information of the present invention) is not received from another ECU (S14: No), that is, when the state of the ECU 1 is different between the ECU 1 itself and the other ECU, It is determined whether or not this state continues for a predetermined time. When it does not continue for a predetermined time (S18: No), this process is terminated. On the other hand, when it continues for the predetermined time (S18: Yes), the process of above-mentioned step S15 is performed.

  The determination as to whether or not the operation of the ECU 1 is not normal may use a majority vote based on the content of the supplemental information. Further, when there is an ECU that has transmitted a signal indicating that the operation of the ECU 1 is not normal, it may be determined that the operation of the ECU 1 is not normal.

  In step S16, the supply of power to the communication bus 71 to which the ECU 1 is connected is interrupted. That is, the MPU 10 sends a command to the control circuit 27, and the control circuit 27 turns off the switch 51. At this time, based on a command from the control circuit 27, the switch 26a of the power supply circuit 26 may be turned off to cut off the supply of power to the transceiver 23 to which the communication bus 71 is connected.

  Finally, the power supply state information including the fact that the power supply to the communication bus 71 is cut off is transmitted to the ECUs connected to the other communication buses (72, 73) (S17). Thereby, the ECU connected to the other communication bus can perform control corresponding to the situation where the information from the communication bus 71 cannot be obtained.

  Step S17 described above is “the communication unit transmits power supply state information reflecting a power supply state to the communication network to the communication network”. With this configuration, the control device can grasp which communication network is operating. Also, information from other control devices is required, but if it is known that the power supply to the communication network to which the control device is connected is interrupted, substitute information is obtained, default values are used, etc. Can be taken promptly.

  In FIG. 3, when an abnormality occurs in the ECU 1 (S12: Yes), the supply of power to the communication bus 71 may be shut off immediately (S16). At this time, steps S13 to S15 are not executed. Further, when supplementary information indicating that an abnormality has occurred in the ECU 1 is acquired from another ECU (S14: Yes), the ECU connected to the communication bus 71 is not transmitted with information for notifying the interruption of the power supply. The power supply to the communication bus 71 may be shut off (S16). At this time, step S15 is not executed.

  Another example of the power supply control process will be described with reference to FIG. The configuration of FIG. 4 is “the state acquisition unit acquires the state of the external power supply (+ B) that supplies power to the electronic control device as the surrounding state”. With this configuration, appropriate power management can be performed according to the state of the external power supply (for example, voltage drop).

  First, for example, battery voltage (+ B) information is acquired via the power supply circuit 21 (S31). Next, it is determined whether or not the acquired battery voltage falls below a predetermined voltage threshold. The configuration of the present invention is configured to be able to cope with a gradual drop in battery voltage and an instantaneous interruption (for example, by setting the execution timing of this process). When the battery voltage exceeds the voltage threshold (S32: No), this process ends. On the other hand, when the battery voltage falls below the voltage threshold (S32: Yes), the operation maintenance information stored in advance in the memory included in the MPU 10 is acquired (S33).

  The voltage threshold is set for each communication bus. For example, among ECUs connected to the communication bus, the one with the highest lower limit of the power supply voltage that can guarantee the operation is set as the voltage threshold.

  The operation maintenance information is set for each communication bus whether or not the operation needs to be maintained when the battery voltage falls below the voltage threshold. When it is necessary to maintain the operation of the communication bus (S34: Yes), a command is sent from the MPU 10 to the control circuit 27 to output a voltage exceeding the voltage threshold value to the power line of the communication bus (S35).

  In this configuration, as shown in FIG. 2, for example, booster circuits (51 a to 53 a) are provided between the switches (51 to 53) of the switch circuit 50 and the power supply line. The switch of the switch circuit 50 is switched to one of three states of ON (with boost) / ON (without boost) / OFF based on a command from the control circuit 27.

  On the other hand, when it is not necessary to maintain the operation of the communication bus (S34: No), a command is sent from the MPU 10 to the control circuit 27, and the control circuit 27 turns off the corresponding switch to supply power to the communication bus. Shut off (S37). At this time, based on a command from the control circuit 27, the corresponding switch of the power supply circuit 26 may be turned off to cut off the supply of power to the transceiver connected to the communication bus that has cut off the power supply.

  Finally, power supply status information reflecting the current power supply status to the communication bus is transmitted to the ECU connected to the communication bus that is supplying power (S36).

  The configuration of the above-described steps S33 to S37 is as follows: “When the state of the external power source is in a predetermined state, the power supply control unit controls only the control device connected to the predetermined communication network. "Supply power so that the operation of the equipment can be maintained." With this configuration, power is supplied in preference to a communication network including a function that must be operated even when the state of the external power supply changes (voltage drop), such as a vehicle engine control system or a traveling system. Thus, it is possible to guarantee the minimum operation of the system.

  FIG. 5 shows a communication sequence between the gateway ECU 100 and the communication buses (71 to 73). FIG. 5 shows a configuration in which information for notifying the interruption of the power supply is not transmitted to the communication bus connected to the ECU in which an abnormality has occurred. First, a state inquiry signal is transmitted from the gateway ECU 100 to all communication buses (that is, ECUs connected to the communication bus) (Q110). A response signal (status response for each ECU) to the status inquiry is transmitted from each communication bus (Q120).

  As described above, when an abnormality is detected in the ECU 1 connected to the communication bus 71, when the determination is made only with the state of the ECU 1, the power supply to the communication bus 71 is cut off (Q130), and the power supply state regarding the communication bus 71 is determined. Information is transmitted to communication buses 72 and 73 (Q140).

  When not judging only by the state of the ECU 1, the above-described Q 130 and Q 140 are not executed, and the ECU 1 is connected to the ECU connected to the communication bus 71 (that is, the communication bus to which the ECU that is considered to have failed) is connected. A status inquiry signal is transmitted (Q150). A state response signal (that is, supplementary information) related to ECU 1 is received from an ECU other than ECU 1 connected to communication bus 71 (Q160).

  When the status response signal includes contents indicating abnormal operation of the ECU 1 and only the status response signal from the ECU connected to the communication bus 71 is used for determination, the power supply to the communication bus 71 is cut off (Q170). Then, the power supply state information regarding the communication bus 71 is transmitted to the communication buses 72 and 73 (Q180).

  When the determination is not made only by the state response signal from the ECU connected to the communication bus 71, the above-described Q170 and Q180 are not executed, and a state inquiry signal regarding the ECU 1 is transmitted to the ECU connected to the communication buses 72 and 73 ( Q190). A state response signal related to ECU 1 is received from ECUs connected to communication buses 72 and 73 (Q200).

  When it is determined that the operation of the ECU 1 is abnormal based on the state response signal, the power supply to the communication bus 71 is cut off (Q210), and the power cut-off information related to the communication bus 71 is transmitted to the communication buses 72 and 73 ( Q220).

  FIG. 6 shows another example of a communication sequence between the gateway ECU 100 and the communication bus (71 to 73). FIG. 6 is a configuration in which information for notifying the interruption of the power supply is transmitted to the communication bus connected to the ECU in which an abnormality has occurred in FIG. Further, only the case where the determination is made only by the state of the ECU 1 when the abnormality of the ECU 1 connected to the communication bus 71 is detected is shown.

  In response to a status inquiry signal (Q110) transmitted from the gateway ECU 100 to all communication buses, a response signal transmitted by each communication bus is received (Q120), and when an abnormality of the ECU 1 is detected, all connected to the communication bus 71 The ECU (1, 2) transmits information for notifying the interruption of the power supply (Q125). For example, at least after a response signal is transmitted from the ECU 2 that seems to be normal (Q126), the power supply to the communication bus 71 is shut off (Q130), and the power supply status information regarding the communication bus 71 is changed to the communication bus 72 and 73 (Q140). Of course, the power supply to the communication bus 71 may be cut off after a predetermined time has elapsed since the transmission of the information for cutting off the power supply.

  If the determination is not made based only on the state of the ECU 1, the above-described notice information is not transmitted between Q120 and Q130 in FIG. 5, and after Q160, the same sequence as Q125 and Q126 is executed, and the process proceeds to Q170.

  When not judging only by the status response signal from the ECU connected to the communication bus 71, the above notice information is not transmitted between Q120 and Q130 and between Q160 and Q170 in FIG. Then, the same sequence as Q125 and Q126 described above is executed, and the process proceeds to Q210.

The gateway ECU 200 may be added to the configuration of FIG. 1, and the power supply control may be executed using both the gateway ECUs 100 and 200. Any of the following may be used as the execution method.
Priority is given to continuing power supply, and power supply to the corresponding communication bus (and transceiver) is cut off only when both gateway ECUs determine that power supply should be cut off.
Priority is given to shutting off the power supply, and when any gateway ECU determines that the power supply should be shut off, the power supply to the corresponding communication bus (and transceiver) is shut off.
・ Priority is given to the determination of any gateway ECU.

  The gateway ECUs 100 and 200 are communicable with each other. For example, the gateway ECU 200 transmits a determination result of whether or not power supply is possible to the gateway ECU 100. The gateway ECU 100 compares its own determination result with the determination result of the gateway ECU 200, and executes any of the above-described power control based on the result.

  Although the embodiments of the present invention have been described above, these are merely examples, and the present invention is not limited to these embodiments, and the knowledge of those skilled in the art can be used without departing from the spirit of the claims. Various modifications based on this are possible.

1-7 ECU (control equipment)
10 MPU (status acquisition unit, power supply control unit)
20 Communication interface (communication unit, status acquisition unit)
26 Power Supply Circuit 27 Control Circuit (Power Control Unit)
40 I / O circuit (I / F, status acquisition unit)
50 Switch circuit 71-73 Communication bus (communication network)
81-83 Power line 100 Gateway ECU (electronic control unit)
+ B battery (external power supply)
NS network system

Claims (12)

A communication unit (20) that communicates with the control devices (1 to 7) connected to the communication network (71 to 73);
A power line (81-83) for supplying power to the control device;
A power control unit (10, 27) that collectively changes the supply state of the power to control devices connected to the same communication network;
A power determination unit (10) for determining whether or not a voltage of an external power supply (+ B) that supplies power to the power supply line is lower than a predetermined voltage threshold;
A booster circuit (51a, 52a, 53a) for boosting the voltage supplied to the power supply line;
The power supply control unit operates the booster circuit to output a voltage exceeding the voltage threshold to the power supply line when the voltage of the external power supply falls below the voltage threshold. (100, 200) .   A plurality of the communication networks are connected to the electronic control device,
  The power supply line and the booster circuit are provided for each of the communication networks,
  An operation maintenance determination unit (10) that determines whether or not the operation needs to be maintained when the voltage of the external power source falls below the voltage threshold for each of the communication networks,
  When the voltage of the external power source falls below the voltage threshold, the power control unit determines that the operation maintenance determination unit needs to maintain the operation. The communication network that has determined that the operation maintenance determination unit does not need to maintain the operation while operating the booster circuit to output a voltage exceeding a threshold value to maintain power supply to the power supply line. The electronic control device according to claim 1, wherein power supply to the power supply line is cut off. Via the communication unit, provided with an abnormality determination unit (10) for determining operation abnormality of the control device,
  The electronic control device according to claim 1, wherein the power control unit cuts off power supply to the communication network to which the control device determined to be abnormal in operation by the abnormality determination unit is connected.   The abnormality determination unit
  A first determination unit that determines an abnormal operation of the control device based on communication with the control device;
  Using the control device determined to be abnormal by the first determination unit as a target control device, acquiring supplementary information related to the operation state of the target control device from another control device that is the control device other than the target control device. And a second determination unit that determines an abnormal operation of the target control device based on the supplementary information,
  The power control unit shuts off power supply to the communication network to which the target control device is connected when both the first determination unit and the second determination unit determine that the target control device is operating abnormally. On the other hand, even if the first determination unit determines an operation abnormality of the target control device, if the second determination unit does not determine an operation abnormality of the target control device, the target control device is connected. The electronic control device according to claim 3, wherein a power supply state to the communication network is maintained.   The electronic control device according to claim 4, wherein the second determination unit acquires the supplementary information from the other control device connected to the communication network to which the target control device is connected.   The electronic control device according to claim 4, wherein the second determination unit acquires the supplementary information from the other control device connected to the communication network to which the target control device is not connected.   The electronic control device according to any one of claims 1 to 6, wherein the communication network is configured for each control device that performs a predetermined functional operation.   A plurality of the communication networks are connected to the electronic control device,
  The said communication part transmits the power supply status information containing the effect which interrupted | blocked the power supply to the said communication network to the said other communication network, when the supply of the power supply with respect to the said communication network is interrupted | blocked. 8. The electronic control device according to any one of 7 above.   In the case where the power supply control unit cuts off the power supply to the communication network, the communication unit supplies power to the control device connected to the communication network to cut off the power supply before the power supply is cut off. The electronic control device according to any one of claims 1 to 8, wherein notice information for notifying supply interruption is transmitted.   A communication unit (20) that communicates with the control devices (1 to 7) connected to the communication network (71 to 73);
  A power line (81-83) for supplying power to the control device;
  A power control unit (10, 27) that collectively changes the supply state of the power to control devices connected to the same communication network;
  An abnormality determination unit (10) for determining an operation abnormality of the control device via the communication unit;
  The power control unit shuts off power supply to the communication network to which the control device determined to be abnormal by the abnormality determination unit is connected,
  In the case where the power supply control unit cuts off the power supply to the communication network, the communication unit supplies power to the control device connected to the communication network to cut off the power supply before the power supply is cut off. An electronic control device (100, 200), characterized by transmitting advance notice information for announcing the interruption of supply.   11. The electronic control device according to claim 9, wherein the power control unit shuts off power supply to the communication network when a response indicating that the advance notice information is received from the control device.   11. The electronic control device according to claim 9, wherein the power control unit shuts off power supply to the communication network when a predetermined time has elapsed since the notification information was transmitted.

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