JP6126866B2 - Wire harness and electronic control device - Google Patents

Description

  The present invention relates to a wire harness and an electronic control device, and more particularly, to a wire harness incorporated in an electronic control device provided with a plurality of control means for controlling equipment mounted on a vehicle, and an electronic control device incorporating the wire harness. It is about.

  Conventionally, for the purpose of wire saving, an area network (electronic control device) has been proposed in which a vehicle is divided into a plurality of areas, an ECU is arranged in each area, and an electronic device arranged in the area is controlled by the ECU. ing. In this area network, power is distributed from the power supply box to each ECU, and power is further distributed from the ECU to each electronic device.

  For this reason, when the number of electronic devices connected to the ECU is increased in order to add options, a safety device such as a wire harness connecting between the ECU and the power supply box or a fuse protecting the wire harness has an allowable current. It needs to be replaced with a larger one. However, conventionally, a safety device such as a fuse is built in the power supply box.

  For this reason, when an electronic device is added to add an option, it is necessary to separately replace the wire harness and the safety device, which complicates the work. In addition, there is a possibility that a safety device that should not be replaced by mistake may be replaced, or a safety device replacement error may occur, and it is not easy to add an electronic device.

  Then, this invention makes it a subject to provide the wire harness and electronic control apparatus which can add an electronic device easily.

The invention according to claim 1 for solving the above-described problem includes a plurality of control means for controlling or monitoring an electronic device mounted on a vehicle, and a power supply box for distributing power to the plurality of control means, A wire harness having a communication line for communicating between the plurality of control means, a power supply line for supplying power distributed from the power supply box, and a ground line , When the control means controls a plurality of the electronic devices, one wire harness is connected to one control means, and an overcurrent flows through the power supply line to a connector connected to the power supply box. It exists in the wire harness characterized by incorporating the safety device which interrupts | blocks.

According to a second aspect of the present invention, there are provided a plurality of control means for controlling or monitoring an electronic device mounted on a vehicle, a power supply box for distributing power to the plurality of control means, and between the control means and the power supply box. And a communication line for performing communication between the plurality of control means, a power supply line for supplying power distributed from the power supply box, and a ground line-a wire harness, and electronic control One control means controls a plurality of the electronic devices, one wire harness is connected to one control means, and the wire harness is connected to a connector with the power supply box. The electronic control device has a built-in safety device that shuts off when an overcurrent flows through the power line.

  As described above, according to the first and second aspects of the invention, since the safety device is built in the connector of the wire harness with the power supply box, the replacement of the wire harness and the replacement of the safety device are performed simultaneously. As a result, the replacement work is simplified, an error in replacing the safety device can be prevented, and an electronic device can be easily added.

It is a block diagram showing one embodiment of an electronic control device incorporating a wire harness of the present invention. It is a figure which shows the detail of the power supply box and module shown in FIG.

  Hereinafter, an electronic control device incorporating the wire harness of the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the electronic control unit 1 includes a plurality of modules 2 arranged in each part of the vehicle, a power supply box 3, and an ECU 22 (see FIG. 2) as a control unit included in the plurality of modules 2 (see FIG. 2). And a plurality of wire harnesses W connecting the three.

  As shown in the figure, the plurality of modules 2 are provided for each of a plurality of areas provided in the vehicle. In the present embodiment, each module 2 is provided around the meter, switch, steering, under cover, lower cover, center cluster, console, and glove box.

  As shown in FIG. 2, the plurality of modules 2 are connected to a plurality of electronic devices 21 (for example, loads and switches such as motors, lamps, and light emitting diodes) arranged in each area, and these electronic devices 21. ECU22. The ECU 22 controls the load in cooperation with the other ECU 22, monitors the state of the switch, and transmits it to the other ECU 22.

  The power supply box 3 is connected to a battery or alternator (not shown), and has a built-in power distribution circuit (not shown) for distributing the power from the battery or alternator to each module 2. Further, the power supply box 3 has a built-in joint circuit for connecting the plurality of ECUs 22 so as to communicate with each other. Further, the power supply box 3 has a box case (not shown) that accommodates a power distribution circuit and a joint circuit (not shown).

  As shown in FIG. 1, the plurality of wire harnesses W serve as communication lines for performing communication between the power lines L <b> 1 and the ground lines L <b> 2 for supplying power distributed from the power supply box 3 and the plurality of ECUs 22. A twisted pair line L3 and an optical fiber L4 are included. The power line L1 and the ground line L2 are connected to a power distribution circuit (not shown) in the power box 3. The electronic device 21 and the ECU 22 of each module 2 operate by receiving power supplied from the power line L1 and the ground line L2.

  The twisted pair line L3 is connected to a joint circuit for the twisted pair line L3 in the power supply box 3. The ECUs 22 of the module 2 can communicate with each other via the twisted pair line L3 and the joint circuit. The optical fiber L4 is connected to a joint circuit for the optical fiber L4 in the power supply box 3. The ECU 22 of the module 2 can communicate with each other via the optical fiber L4 and the joint circuit.

  As shown in FIG. 2, both ends of the wire harness W are provided with a connector C1 for connecting to the power supply box 3 and a connector C2 for connecting to the module 2. Each of the connectors C1 and C2 includes a power supply side terminal (not shown) attached to the terminals of the power supply line L1, the ground line L2, the twisted pair line L3, and the optical fiber L4 constituting the wire harness W, and a power supply side housing that houses these power supply side terminals. And is composed of.

  A safety device 4 such as a fuse is built in the power source side housing of the connector C1. The safety device 4 is provided on the power supply line L1, and when an overcurrent flows through the power supply line L1, the safety device 4 is melted to cut off the overcurrent.

  The box case (not shown) of the power supply box 3 described above is provided with a cylindrical box side housing (not shown) that fits with the power supply side housing of the connector C1, and the connector C1 is provided in the box side housing. The box side terminal (not shown) connected to the electric wire side terminal is accommodated.

  And if the box side housing provided in this box case and the electric wire side housing of connector C1 are fitted, the box side and electric wire side terminals will be connected. Thereby, the power supply line L1 and the ground line L2 are electrically connected to the power distribution circuit, the twisted pair line L3 is electrically connected to the joint circuit, and the optical fiber L4 is connected to the joint circuit. And while supplying electric power to each electronic device 21 and ECU22, ECU22 becomes communicable.

  Next, a procedure for adding an option in the electronic control apparatus 1 described above will be described. First, as shown in FIG. 2, a case where an electronic device 21 (two motors in the example shown in FIG. 2) is added to the already provided module 2 will be described. With the addition of the electronic device 21, the ECU 22 is replaced with one that can control the added electronic device 21. Furthermore, since the current flowing through the power supply line L1 increases due to the addition of the electronic device 21, the wire harness W is replaced with one having the power supply line L1 or the safety device 4 having a large allowable current.

  Next, a case where the entire module 2 is added will be described. As shown in FIG. 2, when adding the entire module 2, it is only necessary to connect the module 2 to be added and the power supply box 3 with the wire harness W for the module 2 to be added.

  According to the embodiment described above, since the safety device 4 is built in the connector C1 with the power supply box 3 of the wire harness W, the replacement of the wire harness W and the replacement of the safety device 4 can be performed simultaneously. The replacement work can be simplified, replacement errors of the safety device 4 can be prevented, and the electronic device 21 can be easily added.

  In the above-described embodiment, the module 2 will be described taking the meter module, the switch module, the steering module, the under cover module, the lower cover module, the center cluster module, the console module, and the glove box module shown in FIG. However, the present invention is not limited to this. Other modules may be used.

  Moreover, although the wire harness W mentioned above had the twisted pair line L3 and the optical fiber L4 as a communication line, this invention is not limited to this. Other communication lines may be included, or any one of the twisted pair line L3 or the optical fiber L4 may be included.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Electronic controller 3 Power supply box 4 Safety device 21 Electronic equipment 22 ECU (control means)
C1 connector L1 power line L2 ground line L3 twisted pair line (communication line)
L4 optical fiber (communication line)
W wire harness

Claims (2)

A plurality of control means for controlling or monitoring an electronic device mounted on a vehicle and a power supply box for distributing power to the plurality of control means are connected, and communication between the plurality of control means is performed. A wire harness having a communication line for performing, a power supply line for supplying power distributed from the power supply box, and a ground line,
One control means controls a plurality of the electronic devices, and one wire harness is connected to one control means,
A wire harness, wherein a connector connected to the power supply box incorporates a safety device that shuts off when an overcurrent flows through the power supply line. A plurality of control means for controlling or monitoring an electronic device mounted on a vehicle; a power supply box for distributing power to the plurality of control means; and connecting between the control means and the power supply box; An electronic control device comprising: a communication line for performing communication between control means; a power line for supplying power distributed from the power supply box; and a wire harness having a ground line,
One control means controls a plurality of the electronic devices, and one wire harness is connected to one control means,
An electronic control device, wherein a safety device that shuts off when an overcurrent flows through the power supply line is incorporated in a connector of the wire harness with the power supply box.

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