JPH0697684A - Electronic circuit device - Google Patents

Abstract

PURPOSE:To acquire an electronic circuit device which can reduce the number of harnesses and brackets, reduce a burden of attaching operation thereof and simplify a circuit. CONSTITUTION:Various control units 21 to 24 for various output devices on a car are detachably connected to a mother board 12. Circuits 36 to 41 which are common to the control units 21 to 24 are provided to the mother board for common use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic circuit device for controlling output devices such as various actuators provided on a vehicle.

[0002]

2. Description of the Related Art Vehicles are equipped with, for example, an air conditioning control unit for controlling the air conditioning of a passenger compartment, an anti-skid control unit for preventing wheel slip, an airbag control unit for inflating an airbag in the event of a collision, and a speed. A constant speed traveling control unit for controlling to a desired speed and various other control units are provided. These units are arranged in the engine room, instrument panel, rear parcel and other vehicle spaces. Then, these units and various sensors and actuators are connected by a harness, and these actuators are controlled by respective control units based on the outputs of the respective sensors and the like.

[0003]

By the way, each control unit is independently arranged in a separate space portion, and as shown in FIG. 4, each control unit 1, 2 ... Is a harness 3, 3 ,. Actuator
In order to connect (not shown) and sensors (not shown), there are many harnesses 3, 3 ... that can be passed through the vehicle. Furthermore, each control unit 1, 2 ... Is mounted on the vehicle by brackets 4, 4 ,. There are also a large number of 4, 4, ... Therefore, there is a problem that the bracket 4 causes an increase in weight, and that the work of mounting the harness 3 and the bracket 4 is heavy.

Further, each control unit 1, 2 is provided with a common circuit such as an interface, for example, which causes many problems such that the circuit becomes complicated as a whole.

The present invention has been made in view of the above problems, and an object thereof is to reduce the number of harnesses and brackets and to reduce the burden of mounting work thereof, and further simplify the circuit. An object is to provide an electronic circuit device capable of achieving the above.

[0006]

In order to achieve the above object, the present invention provides various control units for controlling various output devices provided on a vehicle with a plurality of connectors provided on one motherboard. Each of the control units is detachably mounted, and a common circuit provided in at least one of the control units is provided on the motherboard for common use.

[0007]

According to the present invention, various control units for controlling various output devices are detachably attached to a plurality of connectors provided on one motherboard. Therefore, one bracket for attaching the motherboard to the vehicle is provided. Good, and one control unit
Since it is mounted on one motherboard, it is sufficient to connect one motherboard to various output devices and various sensors with a harness. Therefore, the number of harnesses can be reduced.

Further, since the common circuit provided for each control unit is provided on the mother board for common use, the circuit can be simplified.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an electronic circuit device according to the present invention will be described below with reference to the drawings.

1 and 2, reference numeral 10 denotes a mother unit, which has a case 11 and a mother board 12 provided in the case.

The upper surface 11a of the case 11 has a mounting hole 13
16 are formed, and the control units 21 to 24 can be inserted into the mounting holes 13 to 16. A connector 18 connected to the harness 17 is attached to the side surface 11b of the case 11. The harness 17 is connected to various actuators (output devices), output devices such as instruments, sensors, etc., which are not shown. A bracket 19 is attached to the bottom of the case 11 so that the case 11 can be fixed to the vehicle body.

1 and 2, mounting holes 13 to 1
6 and control units 21-24 are each 4
Although only one is shown, it is provided in addition to this and is omitted for convenience of description.

The motherboard 12 has mounting holes 13-1.
6, connectors 31 to 34 are provided at positions facing each other, and these connectors 31 to 34 have a plurality of connection pins 31.
a to 34a are erected.

As shown in FIG. 3, a constant voltage power supply circuit 35 for supplying electric power to the control units 21 to 24, etc. and input terminals T1 to Tn of the connector 18 are input to the mother board 12. An interface 36 for inputting a sensor signal from each sensor, an input signal processing circuit 37 for processing a speed signal from a vehicle speed sensor (not shown), and a clock for outputting a clock signal for each control unit 21-24 A circuit 38, a memory 39 for storing data, a door lock driver 40 that also serves as a driver for a power window, and each unit 2
A fail safe circuit 41 and the like for preventing runaway of the CPUs 1 to 24 are provided. Output terminal Q of connector 18
1 to Qn are connected to output devices such as actuators (not shown) via a harness 12.

The control unit 21 includes a case 21.
Output from a temperature sensor (not shown) and an air conditioning control circuit 21c including a CPU for controlling air conditioning of a passenger compartment, an air conditioning driver 21e for driving an air conditioning actuator (not shown), and a temperature sensor (not shown). A signal processing circuit 21f for processing a temperature signal is provided, and a female connector 21d for detachably inserting the connection pins 31a ... Is attached to the board 21b.

Then, when the case 21a is inserted into the mounting hole 13 and the connecting pins 31a are inserted into the female connector 21d to mount the control unit 21 on the motherboard 12, the signal processing circuit 21f connects the interface 36 and the input terminal T1. The driver 21e is connected to the air conditioning actuator via the output terminal Q1. The air conditioning control circuit 21c controls the output of the driver 21e based on the output of the temperature sensor.

The control unit 22 includes a case 22.
An anti-skid control circuit 22c including a CPU or the like for preventing wheel slip, for example, is provided on a board 22b provided in a,
An antiskid driver 22e for driving an antiskid actuator (not shown) and a wheel rotation sensor
A signal processing circuit 22f for processing a rotation signal output from (not shown) is provided, and a connection pin 32a is further provided on the substrate 22b.
It is configured by attaching a female connector 22d for detachably inserting.

Then, when the case 22a is inserted into the mounting hole 14 and the connecting pins 32a are inserted into the female connector 22d to mount the control unit 22 on the motherboard 12, the signal processing circuit 22f connects the interface 36 and the input terminal T3. The driver 22e is connected to the wheel rotation sensor via the output terminal Q2 and the anti-skid actuator. The antiskid control circuit 22c controls the output of the driver 22e based on the output of the wheel rotation sensor.

The control unit 23 includes a case 23.
An air bag control circuit 23c including a CPU for inflating an air bag (not shown) only when a vehicle collides with the board 23b provided in a, and an inflator of an air bag module (output device) not shown. A driver 23e for supplying a current to (not shown) and a signal processing circuit 23f for processing a collision signal output from a collision sensor (not shown) are provided, and further connection pins 33a ... Are detachably inserted into the board 23b. The female connector 23d is attached and configured.

When the case 23a is inserted into the mounting hole 15 and the connecting pins 33a are inserted into the female connector 23d to mount the control unit 23 on the motherboard 12, the signal processing circuit 23f connects the interface 36 and the input terminal T4. Connected to the collision sensor via
The driver 23e is connected to the inflator of the airbag module through the output terminal Q3. The airbag control circuit 23c causes the driver 23e to output a predetermined current based on the output of the collision sensor.

The control unit 24 includes a case 24.
a constant speed running control circuit 24c including a CPU or the like for controlling the speed of the vehicle to a desired speed on a board 24b provided in a;
An accelerator driver 24e for driving an accelerator opening actuator (not shown) and a signal processing circuit 24f for processing an opening signal output from an accelerator opening sensor (not shown) are provided, and a connection pin 34a is provided on the board 24b. It is configured by attaching a female connector 24d for detachably inserting.

When the case 24a is inserted into the mounting hole 16 and the connecting pins 34a ... Are inserted into the female connector 24d to mount the control unit 24 on the motherboard 12, the signal processing circuit 24f connects the interface 36 and the input terminal T5. The input signal processing circuit 37 and the constant speed traveling control circuit 24c are connected to the accelerator opening sensor via the accelerator opening sensor, and the driver 24e is connected to the accelerator opening actuator via the output terminal Q4. The constant speed traveling control circuit 24c controls the output of the driver 24e based on the outputs of the accelerator opening sensor and the vehicle speed sensor to control the vehicle speed to a desired speed.

The input signal processing circuit 37 is connected to a vehicle speed sensor (not shown) via the interface 36 and the input terminal T2, processes the vehicle speed signal output from this vehicle speed sensor and outputs it to the constant speed running control circuit 24c. In addition to the above, it is also output to other automatic transmission control circuit and the like (not shown). This automatic transmission control circuit is provided on a substrate provided in a case (not shown), and this case is detachably attached to the mother board 12 in the same manner as described above.

The memory 39 is used by the control unit 21.
Required temperature in the vehicle compartment, temperature data detected by the temperature sensor, set traveling speed required by the control unit 24, speed data detected by the vehicle speed sensor, data required by other control units, etc. Is to remember.

The door lock driver 40 is controlled not only by a door lock control unit (not shown) but also by a window power control unit (not shown), and is used as a door lock driver or as a wind power driver. It is something to use. The door lock control unit and the window power control unit are also detachably attached to the mother board 12 as described above.

Thus, the interface 36, the input signal processing circuit 37, the clock circuit 38, the memory 39, the door lock driver 40, the fail safe circuit 41, etc.
Since it is provided on one mother board 12 and shared by the respective control units 21 to 24 and other control units, the overall circuit configuration is simplified. By the way, each of these circuits is provided for each of the control units 21 to 24 and other control units, so that the overall circuit configuration is complicated.

Further, various control units 21 to 24 for controlling various actuators are respectively connected to a plurality of connectors 31 to 34 provided on one motherboard 12.
Motherboard 1 because it is detachably attached
Only one bracket 19 is required to attach 2 to the vehicle body. Further, since it is only necessary to connect the motherboard 12 to various actuators and various sensors with a harness, the number of harnesses can be reduced, and the burden of the work of mounting the motherboard 12 and the harness can be considerably reduced.

[0028]

According to the present invention, since various control units for controlling various output devices are detachably attached to a plurality of connectors provided on one motherboard, the motherboard is attached to the vehicle. Only one bracket is required. Moreover, since various control units are mounted on one motherboard, it suffices to connect one motherboard to various output devices and various sensors with a harness. Therefore, the number of harnesses can be reduced. The burden of installing the motherboard and harness is considerably reduced.

Further, since the common circuit provided for each control unit is provided on one mother board for common use, the circuit can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a mother unit according to the present invention,

FIG. 2 is a sectional view showing the configuration of a mother unit according to the present invention,

FIG. 3 is a block diagram showing a configuration when each control unit is mounted on a motherboard,

FIG. 4 is a perspective view for explaining a mounting state of a conventional control unit.

[Explanation of symbols]

 12 Motherboard 21-24 Control Unit 36 Interface 37 Input Signal Processing Circuit 38 Clock Circuit 39 Memory 40 Door Lock Driver 41 Fail-Safe Circuit

Claims (1)

[Claims] 1. Various control units for respectively controlling various output devices provided in a vehicle are detachably attached to a plurality of connectors provided on one mother board, and at least one of these control units is attached. An electronic circuit device characterized in that a common circuit is provided on the motherboard for common use.