JP6095990B2 - 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 including a plurality of control means for controlling devices mounted on a vehicle and an electronic control device incorporating the wire harness. Is.

  As the above-described conventional electronic control device, for example, the one shown in FIG. 5 is known. As shown in the figure, the electronic control unit 101 includes a plurality of ECUs 102 (= control means) connected to equipment (not shown) mounted on the vehicle. The plurality of ECUs 102 are connected to a CAN junction 104 (hereinafter abbreviated as CANJ / C104) via a twisted pair electric wire 103. As a result, as shown in FIG. 6, a plurality of ECUs 102 are connected in a bus form, and each ECU 102 can communicate with each other and controls devices connected to itself in cooperation with the other ECUs 102.

  In the electronic control device 101 described above, the termination resistor RT2 is provided for the purpose of suppressing the reflected voltage at both ends of the bus line and adjusting the bus level. Conventionally, in the electronic control apparatus 101 described above, as shown in FIG. 5, the ECU 102 connected to both ends of the bus line is built in the termination resistor RT2.

  However, in that case, the ECU 102 having the built-in termination resistor RT2 cannot be excluded from communication even if the ECU 102 is unnecessary, so that the degree of freedom of the combination pattern of the ECU 102 is limited. there were. In order to freely combine the ECUs 102, it is necessary to prepare each ECU 102 with a terminal resistor RT2 built-in and one without a built-in terminal resistor RT2, which causes a cost problem. Further, since the ECU 102 is provided with the termination resistor RT2, there is a problem that communication flexibility is low.

  Then, this invention makes it a subject to provide the wire harness and electronic control apparatus which aimed at the improvement of the freedom degree of the combination pattern of ECU, and the flexibility of communication.

The invention of claim 1, wherein for solving the above problems, and one of a plurality of control means connected to devices mounted on a vehicle, said plurality of control means and a joint box for connecting bus-type , and a connection between a communication line for performing communication between said plurality of control means, in the wire harness having a connector provided at both ends of the communication line, the connector being connected to the joint box In addition, the present invention resides in a wire harness characterized by a built-in termination resistor.

  According to a second aspect of the present invention, the joint box includes a power supply box that distributes power to the plurality of control means, and the wire harness supplies power supplied from the power supply box. The wire harness according to claim 1, further comprising a wire and a ground wire.

According to a third aspect of the present invention, there are provided a plurality of control means connected to equipment mounted on a vehicle, a joint box for connecting the plurality of control means in a bus type, one of the plurality of control means , and the between joint box connected respectively, and a plurality of wire harnesses having connectors provided at both ends of the communication line and the communication line for performing communication between said plurality of control means, the plurality of wire harnesses Two of them are in an electronic control device characterized in that a terminal resistor is built in a connector connected to the joint box.

  As described above, according to the first to third aspects of the present invention, the terminal resistor is built in the connector connected to the power supply box of the wire harness. Therefore, it is not necessary to incorporate a termination resistor in the control means, and the degree of freedom of the combination pattern of the control means is improved. In addition, since a termination resistor can be mounted at the approximate center of each control means, communication flexibility is improved.

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 an example of the arrangement place of each module shown in FIG. It is a figure which shows the power distribution circuit incorporated in the power supply box shown in FIG. It is a figure which shows the joint circuit incorporated in the power supply box shown in FIG. It is a figure which shows an example of the conventional electronic control apparatus. It is a figure which shows the joint circuit built in CANJ / C shown in FIG.

  Hereinafter, an embodiment of an electronic control device incorporating a wire harness of the present invention will be described with reference to the drawings. As shown in FIG. 1, the electronic control device 1 includes a plurality of modules 2 arranged in each part of the vehicle, a power source box 3 as a joint box, and an ECU 21-power source as a control means included in the plurality of modules 2 described later. And a plurality of wire harnesses W connecting between the boxes 3.

  As shown in FIG. 2, the plurality of modules 2 are arranged for each of a plurality of areas provided in the vehicle, and devices (loads, switches, sensors, etc.) not shown arranged in each area, and these devices ECU21 (FIG. 1) to be connected. The ECU 21 controls the load in cooperation with the other ECU 21 and transmits the state of the switch and the sensor to the other ECU 21.

  As shown in FIG. 3, the power supply box 3 is connected to a battery 4 mounted on the vehicle, and includes a power distribution circuit 31 for distributing power from the battery 4 to the modules 2. Further, as shown in FIG. 4, the power supply box 3 incorporates a joint circuit 32 for connecting the plurality of ECUs 21 to each other in a bus type. The power supply box 3 has a box case (not shown) that accommodates the power distribution circuit 31 and the joint circuit 32.

  The plurality of wire harnesses W are a power line L1 and a ground line L2 (FIG. 3) for supplying power distributed from the power supply box 3, and a twisted pair line L3 as a communication line for performing communication between the plurality of ECUs 21. (FIG. 4). The power line L1 and the ground line L2 are connected to a power distribution circuit 31 in the power box 3 as shown in FIG. The ECU 21 and devices of each module 2 operate by receiving power supply from the power supply line L1 and the ground line L2. The twisted pair line L3 is connected to the joint circuit 32 in the power supply box 3 as shown in FIG. The ECU 21 of the module 2 can communicate with each other via the twisted pair line L3 and the joint circuit 32.

  As shown in FIG. 1, both ends of the wire harness W are provided with a connector C <b> 1 for connecting to the power supply box 3 and a connector C <b> 2 for connecting to the module 2. Each of the connectors C1 and C2 includes a wire-side terminal fitting (not shown) attached to the terminals of the power supply line L1, the ground line L2, and the twisted pair wire L3 constituting the wire harness W, and a wire-side housing that houses these wire-side terminal fittings. It is composed of

  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 electric wire side housing of the connector C1, and the connector C1 is provided in the box side housing. A box side terminal fitting (not shown) connected to the electric wire side terminal fitting is accommodated.

  And if the box side housing provided in this box case and the electric wire side housing of the connector C1 are fitted, the box side and electric wire side terminal metal fittings will be connected. As a result, the power supply line L1 and the ground line L2 are electrically connected to the power distribution circuit 31, and the twisted pair line L3 is electrically connected to the joint circuit 32.

  A connector C1 of the wire harness W connected to both ends of the bus line provided in the joint circuit 32 includes a termination resistor RT. This termination resistor RT is accommodated in a wire-side housing (not shown) in the connector C1, and both ends are connected between a pair of wires constituting the twisted pair wire L3.

  According to the embodiment described above, the termination resistor RT is built in the connector C1 connected to the power supply box 3 of the wire harness W. Therefore, it is not necessary to incorporate the termination resistor RT in the ECU 21, and the degree of freedom of the combination pattern of the ECU 21 is improved. In addition, since the termination resistor RT can be mounted at substantially the center of each ECU 21, the communication flexibility is improved.

  According to the above-described embodiment, both the power distribution circuit 31 and the joint circuit 32 are built in the power supply box 3, but the present invention is not limited to this. A joint box may be provided separately from the power supply box 3, and the joint circuit 32 may be incorporated therein.

  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.

1 Electronic control unit 3 Power supply box (joint box)
21 ECU (control means)
W Wire harness RT Terminating resistor C1 Connector L1 Power line L2 Ground line L3 Twisted pair line (communication line)

Claims (3)

And one of a plurality of control means connected to devices mounted on a vehicle, said plurality of control means to Connect the joint box for connecting bus, between the communication between the plurality of control means In a wire harness having a communication line for carrying out , and connectors provided at both ends of the communication line ,
A wire harness, wherein a termination resistor is built in the connector connected to the joint box. The joint box is composed of a power supply box that distributes power to the plurality of control means,
The wire harness according to claim 1, wherein the wire harness includes a power supply line and a ground line for supplying power distributed from the power supply box. A plurality of control means connected to equipment mounted on a vehicle; a joint box for connecting the plurality of control means in a bus type; and connecting one of the plurality of control means and the joint box, respectively. A communication line for performing communication between the plurality of control means, and a plurality of wire harnesses having connectors provided at both ends of the communication line ,
In two of the plurality of wire harnesses, the connector connected to the joint box, the electronic control apparatus characterized by terminating resistor is built.

Images