JPS6288636A - Assembly structure of vehicle electronic control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an electronic control device for a vehicle, and more particularly to an assembly structure for an electronic control device for a vehicle that is improved in terms of ease of assembling a wire harness.

<Conventional technology> Conventionally, in order to control in-vehicle equipment such as headlights, meters, stoplights, etc., it was necessary to wire a large number of electric wires inside the vehicle body. I was trying to solve the problem. However, in recent years, with the trend toward computerization of vehicle control and an increase in the number of on-vehicle devices, the external dimensions of wire harnesses have become larger, and problems have arisen in terms of ease of assembly and maintenance, as well as an increase in the weight of the vehicle.

Furthermore, various electronic control devices for vehicle control are often mounted mainly inside the vehicle cabin from the viewpoint of reliability. Therefore, the signal lines connected to the engine and other equipment installed in the engine room must be bundled together as a wire harness and pass through the bulkhead that separates the engine room and the passenger compartment. The number of man-hours required for attachment tends to be relatively large.

Therefore, by installing a junction box in the vehicle interior and in the engine room, and transmitting and receiving signals through both junction boxes, the wiring harness that connects the vehicle interior and the engine compartment can be unified. , it is possible to reduce the number of man-hours required for assembling the wire harness. Alternatively, by installing multiplex communication units in the vehicle interior and engine room, and transmitting and receiving signals via both multiplex communication units, the number of signal lines connecting the vehicle interior and the engine room can be reduced. It is also possible to prevent the wire harness from becoming enlarged by reducing it as much as possible.

However, in either case, an increase in the number of parts such as a junction box or a multiplex communication unit results in an increase in parts cost, and these methods have not been widely adopted.

<Problems to be Solved by the Invention> In view of the problems of the prior art, the main object of the present invention is to improve the assemblability of a wire harness and to prevent local enlargement of the outer diameter of the wire harness. It is an object of the present invention to provide an assembly structure for an electronic control device for a vehicle that can avoid such problems.

<Means for Solving the Problems> According to the present invention, in an assembly structure of a vehicle electronic control device that includes a built-in CPU and controls the running of a vehicle, the electronic control device is An electronic control for a vehicle, characterized in that it is attached to an opening in a partition wall that partitions an engine room and a vehicle interior, and has at least one coupler on the engine room side for connecting a wire harness. This is achieved by providing an assembly structure for the device.

In this way, the electronic control device that controls the equipment mounted on the engine room side is attached to the opening in the bulkhead, and a coupler is installed on the engine room side of the electronic control device, and if necessary, a simple By providing a coupler on the passenger compartment side, the electronic control device can also be used as a junction box for a wire harness that connects the inside of the engine room and the inside of the vehicle, thereby reducing the number of man-hours required for arranging the wire harness.

<Embodiments> Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a layout diagram showing how a vehicle electronic control device according to the present invention is assembled into a vehicle. An electronic fuel injection control unit 1 and an anti-lock brake control unit 2, which are electronic control devices for a vehicle, are respectively attached to openings 3a and 3b formed at predetermined positions of a partition wall 3 that partitions an engine room and a vehicle interior. A battery 4, a relay box 5, and an anti-lock brake modulator 6 are installed in the engine room, and a junction box 7, a power window control unit 8, and a door lock control unit 9 are installed in the vehicle interior.

The electronic fuel injection control unit 1 mainly controls the engine 10, and the electronic fuel injection control unit 1 includes a fuel injector 11 that injects and supplies the fuel necessary for the engine 10, and a cooling water temperature of the engine 10. The engine 1 includes a cooling water temperature sensor 12 that detects the temperature of the air supplied to the engine 10, and an intake air temperature sensor 13 that detects the temperature of the air supplied to the engine 10.
The equipment necessary for controlling 0 is connected.

The anti-lock brake control unit 2 mainly controls the brakes, and the anti-lock brake control unit 2 includes a wheel sensor 14 that detects the rotational speed of each wheel.
．． 15, 16, and 17, and an anti-lock brake modulator 6 that controls the braking force of each brake.

The junction box 7 collects and delivers a wire harness that connects the relay box 5 installed in the engine room and devices installed mainly in the vehicle interior and at the rear of the vehicle. A power window control unit 8 and a door lock control unit 9 are connected to the inside of the vehicle interior of the junction box 7 via a wire harness 18 and a power line 19, and are installed on an instrument panel (not shown). Switches are connected via the wire harness 20, and various devices (not shown) installed in the passenger compartment and rear of the vehicle are connected to the wire harness 2.
1.

The relay box 5 mainly distributes and supplies power from the battery 4 to each device.The relay box 5 houses a relay and a fuse, and is connected to the battery 4 via a power line 22. , are connected to headlights 24, 25, a cooling fan motor (not shown), etc. via a wire harness 23. Further, the relay box 5 and the junction box 7 are connected through holes formed in the partition wall 3 by a power line 26 and a wire harness 27, respectively.

In the case of this embodiment, anti-lock brake control unit 2
Wire harness connection couplers 33 and 34 are provided on the engine room side and the passenger compartment side, respectively, and the wire harness 28 connected to the equipment installed on the engine room side is connected to the coupler 33 on the engine room side. Wire harness 2 connected to equipment installed in the passenger compartment
9 is connected to a coupler 34 on the passenger compartment side. Further, the electronic fuel injection control unit 1 is also provided with a wire harness connection coupler 35 on the engine room side.
A wire harness 30 connected to a detector and various devices installed at the 0, etc. is connected to the coupler 35. Further, the electronic fuel injection control unit 1, the anti-lock brake control unit 2, and the relay box 5 are connected to each other by power lines 31 and 32 on the engine room side.

In this embodiment, as mentioned above, the wire harness that is connected to the equipment installed in the engine room can be connected to each control unit only on the engine room side, so that the wire harness can be automatically installed. I can handle it.

<Effects of the Invention> As described above, according to the present invention, an electronic control device for controlling equipment mounted on the engine room side is attached to an opening in a partition wall, and a coupler is provided on the engine room side of the electronic control device. As a result, the wire harness that connects to the equipment installed in the engine room can be installed only in the engine room, which reduces the number of man-hours required to install the wire harness, and the effect is extremely large. be. Furthermore, by reducing the amount of wire harnesses installed through the bulkhead, it is possible to avoid local enlargement of the outer diameter of the wire harnesses, making it easier to take in the wire harnesses, allowing for various electronic controls. It may also be easier to install the device.

[Brief explanation of drawings]

FIG. 1 is a layout diagram showing how a vehicle electronic control device according to the present invention is assembled into a vehicle. 1... Electronic fuel injection control unit 2... Anti-lock brake control unit 3... Bulkhead 3a, 3b... Opening 4... Battery 5... Relay box 6... Anti-lock brake modulator 7... Junction box 8... Power window control unit 9... Door lock control unit 10... Engine 11... Fuel injector 12... Cooling water temperature sensor 13... Intake air temperature sensor 14~ 17... Wheel sensor 18... Wire harness 19... Power line 20.21
... Wire harness 22 ... Power line 23 ... Wire harness 2
4.25...Headlight 26...Power line 27-30...Wire harness 31.32...Power line

Claims (2)

[Claims] (1) In the assembly structure of a vehicle electronic control device that has a built-in CPU and controls the running of the vehicle, the electronic control device is attached to an opening in a partition wall that partitions an engine room and a vehicle compartment, An assembly structure for an electronic control device for a vehicle, further comprising at least one coupler on the engine room side for connecting a wire harness. (2) The electronic control device for a vehicle according to claim 1, wherein the electronic control device has at least one coupler inside the vehicle interior for connecting a wire harness. assembly structure.