JP2021035803A - On-board control device - Google Patents

Abstract

To provide a control device that can suppress battery exhaustion during transportation period after vehicle manufacturing at low cost.SOLUTION: A control device is mounted to a vehicle and includes a detection unit and a control unit. The detection unit detects that a predetermined fuse is removed from a predetermined power supply line. The control unit issues a notification for suppressing current consumption by a device that is mounted to the vehicle and supplied with power without intervention of the predetermined fuse when the detection unit detects that the predetermined fuse is removed.SELECTED DRAWING: Figure 1

Description

The present invention relates to a control device mounted on a vehicle or the like.

The vehicle is equipped with a plurality of devices such as electronic devices and electrical components called ECUs (Electronic Control Units). Even when the power supply of the vehicle is in the ignition off state or the accessory off state, the amount of electricity stored in the battery decreases due to the standby current and leak current of the device (collectively referred to as dark current), and the amount of electricity stored when left for a long time. There is a risk that the condition will be below the fixed amount (battery dead).

Patent Document 1 discloses a technique for suppressing a battery exhaustion during a transportation period after the vehicle is manufactured. In the technique of Patent Document 1, a first power supply line used during the transportation period and a second power supply line used after the transportation period are provided between the battery and the device, and the second power supply line is conducted during the transportation period. Remove the fuse to be used and attach it to the first power line. The second power line is provided with a relay that is controlled to be closed when the ignition is turned on. As a result, during the transportation period, the current to the device is cut off and the dark current is suppressed except when the ignition is turned on due to temporary running or the like.

Japanese Unexamined Patent Publication No. 2010-137748

In the technique of Patent Document 1, a relay that is used only during the transportation period is newly provided. However, it is not realistic in terms of cost to provide such parts with extremely limited utilization opportunities.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a control device capable of suppressing battery exhaustion during a transportation period after vehicle manufacture at low cost.

In order to solve the above problems, one aspect of the present invention is a control device mounted on a vehicle, in which a detection unit for detecting that a predetermined fuse has been removed from a predetermined power line and a detection unit are used. A control device equipped with a control unit that notifies a device mounted on a vehicle and supplied with power without passing through a predetermined fuse when it detects that a predetermined fuse has been removed to suppress current consumption. is there.

According to the present invention, the control device controls the power consumption by detecting the removal of the fuse, so that the battery exhaustion during the transportation period after the vehicle is manufactured can be suppressed at low cost without providing a relay or the like. Equipment can be provided.

Configuration diagram of the control device and its peripheral portion according to an embodiment of the present invention. A flowchart showing processing during a transportation period according to an embodiment of the present invention.

In one embodiment of the present invention, by removing a predetermined fuse during the transportation period, the power supply to the device which does not have a problem even if the operation is stopped during the transportation period is stopped. When the control device detects the removal of a predetermined fuse, the control device shifts the device, which is required to operate constantly even during the transportation period, to a state in which unnecessary power consumption is suppressed. As a result, it is possible to suitably suppress the battery exhaustion. Further, in order for the control device to detect the removal of a predetermined fuse, for example, the voltage of a predetermined power supply line or the like may be simply monitored, so that the cost can be suppressed as compared with the provision of a relay or the like.

(Embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Structure>
FIG. 1 shows a configuration diagram of the control device 10 and its peripheral portion according to the present embodiment.

In the present embodiment, as an example, the control device 10 is provided as an upper node of the network system 1. The control device 10 is an upper device which is an upper node, has a device (intermediate device) 20 which is a middle node under the control device 10, and a device (lower device) 30 which is a lower node under the middle node. In the example shown in FIG. 1, an intermediate node and a subordinate node under the intermediate node are shown one by one, but typically, a plurality of intermediate nodes are dispersed in each part of the vehicle, and each intermediate node has a plurality of intermediate nodes. There are multiple subordinate nodes under it in the vicinity.

As an example, the control device 10 which is a higher-level device is a relatively high-performance ECU that intensively executes calculations for various vehicle control functions.

The device 30, which is a lower device, is, for example, a sensor or an actuator, or an ECU having a relatively specialized function for individually controlling these.

As an example, the device 20 which is an intermediate device is an ECU that functions as a gateway that relays communication between the control device 10 and the device 30. The device 20 is connected to the control device 10 by a communication line 101, and is connected to a subordinate device 30 by a communication line 102.

In this example, the control device 10 which is a higher-level device collects information on the vehicle and the surroundings of the vehicle from the device 30 which controls the sensor via the device 20 which is a gateway. This information is, for example, the operating state of the actuator, the running state such as the speed and acceleration of the vehicle, the environmental condition such as the road and the target around the vehicle, the seating condition of the occupant, and the operation content performed for each part of the vehicle. Etc. can be included. Some switches and sensors such as a start switch may be directly connected to the control device 10, and the control device 10 acquires information from these switches and sensors without going through the device 20. You may. The control device 10 performs an operation based on this information and generates control data. The control data includes driving support functions such as automatic driving function, automatic parking function, collision avoidance, lane keeping, following the vehicle in front, and speed maintenance, operation control of engine, transmission, cooler, air conditioner, and battery charge / discharge control. It is data for controlling various vehicles such as headlamp lighting according to illuminance, door unlocking permission by authentication of portable device (electronic key), and information presentation to users. The control device 10 transmits control data to the device 20 to cause the device 20 to perform an operation according to the control data. Further, the control device 10 transmits control data to the device 30 via the device 20 which is a gateway, and causes an operation according to the control data. In such a network system 1, by consolidating various control functions of the vehicle into the highly functional control device 10, the configurations of the device 20 and the device 30 are relatively simplified instead, and the overall cost is reduced. I am trying to.

Each of the above devices is typically configured to include a control unit such as a processor or a microcomputer and a memory, and the subordinate devices include a sensor and an actuator but do not include a control unit or a memory. There may be.

The battery 50 supplies electric power to the control device 10, the device 20, and the device 30. The battery 50 also supplies electric power to other devices mounted on the vehicle. FIG. 1 illustrates a DC cut target device 40 as a part of another device. The DC cut target device 40 is a device that does not need to operate during the period from the manufacture of the vehicle to the delivery to the user, and there is no problem even if the power supply itself is stopped during this period. The DC cut target device 40 is, for example, a navigation device, an ETC (electronic toll collection device), a HUD (head-up display), or the like. Although the DC cut target device 40 is not included in the network system 1 described above in FIG. 1, it may be included in the network system 1, provided under the device 20, and controlled by the control device 10. Moreover, the number may be plural.

The control device 10 receives power from the battery 50 via the power line 52. The power line 52 may be provided with a fuse 62. The device 20 receives power from the battery 50 via the power line 53. The power line 53 may be provided with a fuse 63. The device 30 receives power from the battery 50 via the power line 54. The power line 54 may be provided with a fuse 64.

The DC cut target device 40 receives power from the battery 50 via the power supply line 51. The power line 51 is provided with a fuse (DC cut fuse) 61. The power line 51 is also connected to the control device 10. The power line 51 may be provided with fuses 65 and 66 in addition to the fuse 61. When the fuse 61 is removed, the power supply to the DC cut target device 40 is stopped, but the power supply to the control device 10, the device 20, and the device 30 is not stopped.

The control device 10 has a detection unit 11 that detects that the fuse 61 has been removed or attached from the power supply line 51, and, as will be described later, when it detects that the fuse 61 has been removed from the power supply line 51, The subordinate device 20 includes a control unit 12 that gives a notification for suppressing current consumption. The control unit 12 also executes various control functions of the vehicle described above. The connection topology of the network system 1 is not particularly limited and can be changed as appropriate as long as the control device 10 can execute such control.

After being manufactured at the factory, the vehicle undergoes final inspection and protective wrapping, etc., and is stored in the yard, where it is loaded onto trucks and ships for transportation, or installed between transportations. It is brought to the dealer. The vehicle brought to the dealer is handed over to the user. Here, for example, the period from the completion of the final inspection to the delivery to the dealer will be referred to as the transportation period. Even during the transportation period, the network system 1 is required to operate at least a part of the functions because there are minimum necessary operations such as the vehicle self-propelling for a short time.

Conventionally, in the transportation period, for example, by removing a part of the fuse at the end of inspection or pasting the wrap and stopping the power supply to some devices, for example, until the fuse is installed at the time of delivery to the dealer. The dark current is suppressed. Focusing on this, the present embodiment pays attention to this, and when the fuse 61 is removed from the power supply line 51, not only the power supply to the DC cut target device 40 is stopped, but also the current consumption of other devices included in the network system 1 is consumed. It suppresses. This process will be described below.

<Processing>
The processing of the network system 1 according to the present embodiment will be described below with reference to the flowchart shown in FIG. This process is carried out during the transportation period.

(Step S101): The detection unit 11 of the control device 10 detects that the fuse 61 has been removed based on, for example, a change in the voltage of the power supply line 51 connected to the control device 10.

(Step S102): The control unit 12 of the control device 10 notifies the device 20, which is an intermediate device, to suppress the power consumption via the communication line 101.

(Step S103): Upon receiving the notification from the control device 10, the device 20 stops the processing other than the predetermined processing required during the transportation period. For example, the device 20 is periodically activated to stop a process of communicating with the control device 10 and the device 30. Further, the device 20 appropriately transfers a notification for suppressing power consumption to the device 30, which is a subordinate device, via the communication line 102. Upon receiving the notification, the device 30 also stops processing other than necessary processing during the transportation period.

As a result, the operation mode of the network system 1 shifts from the normal mode to the transportation mode in which the power consumption is suppressed. Even in the transportation mode, when the worker presses the start switch to perform an operation such as ignition on for the purpose of self-propelling the vehicle, the control device 10 controls the devices 20 and 30 to control the engine. Performs processing such as starting. As described above, in the transportation mode, the control device 10 and the devices 20 and 30 perform a predetermined operation permitted as an operation required during the transportation period such as engine start and control for ensuring the safety thereof. .. However, the control device 10 and the devices 20 and 30 do not perform any other control. Further, in the transport mode, the control device 10 and the devices 20 and 30 are expected to travel in a limited situation such as a short-distance movement in a yard even when controlling a predetermined operation permitted. Based on this, unique controls that are not included in the normal mode control, such as setting a vehicle speed limit, may be performed.

(Step S104): The detection unit 11 of the control device 10 detects that the fuse 61 has been attached, for example, based on a change in the voltage of the power supply line 51 or the like.

(Step S105): The control unit 12 of the control device 10 notifies the device 20, which is an intermediate device, to release the suppression of power consumption via the communication line 101.

(Step S106): Upon receiving the notification from the control device 10, the device 20 resumes the predetermined processing that has been stopped. Further, the device 20 notifies the device 30 which is a subordinate device under the control line 102 via the communication line 102 to release the suppression of the power consumption. Upon receiving the notification, the device 30 also resumes the stopped processing.

As a result, the operation mode of the vehicle shifts from the transport mode to the normal mode. After that, the control device 10, the devices 20, and 30 perform control according to general product specifications for users as control in the normal mode. This completes the process, and the vehicle is ready for delivery to the user.

(effect)
In the present embodiment, the DC cut target device 40, which has no problem even if the power supply itself is stopped during the transportation period, is a device that may need to be operated during the transportation period as well as stopping the power supply. With respect to 20 and 30, the control device 10 shifts to the transport mode in which the operation content is limited and unnecessary power consumption is suppressed. As a result, it is possible to suitably suppress the battery exhaustion during the transportation period.

Since the control device 10 detects the removal and installation of the fuse, which is conventionally performed during the transportation period, to suppress and release the suppression of power consumption, respectively, it may take more time and effort than the conventional work. No need to introduce new tools or add new processes for work. Further, in order for the control device 10 to detect the removal and installation of the fuse, for example, it suffices if the voltage of the power supply line or the like can be easily monitored, and the cost can be suppressed as compared with the provision of the relay or the like.

The control device 10 can be implemented as a host device that intensively executes vehicle control in the network system 1, and can appropriately control the devices 20 and 30 to ensure necessary operations and their safety during the transportation period. It is possible to reliably execute the necessary processing according to a predetermined specification. The control device 10 can be mounted as such a higher-level device if it is possible to appropriately notify the devices such as the devices 20 and 30 of the suppression and release of the suppression according to the removal and installation of the fuse. It does not have to be.

The present invention includes not only a control device, but also a network system including the control device, a control method executed by the control device including a processor and a memory, a control program, and a computer-readable non-temporary storage medium that stores the control program. It can be regarded as a vehicle equipped with a network system. Further, the present invention can be applied to other than the control device mounted on the vehicle.

The present invention is useful for a control system mounted on a vehicle or the like.

1 Network system 10 Control device 20, 30 Device 40 DC cut target device 50 Battery 51, 52, 53, 54 Power line 61, 62, 63, 64, 65, 66 Fuse 101, 102 Communication line

Claims (1)

A control device mounted on a vehicle
A detector that detects that a predetermined fuse has been removed from a predetermined power line, and
When the detection unit detects that the predetermined fuse has been removed, the control that notifies the device mounted on the vehicle and supplied with power without passing through the predetermined fuse to suppress the current consumption. A control device including a unit.

Images