JPH0650645A - Electronic component cooler - Google Patents

Abstract

PURPOSE:To cool a vehicle control electronic component disposed at a place which becomes relatively highly humid at low cost by providing a fan attached to a motor and disposing the component at a position for receiving a wind from the fan. CONSTITUTION:A control circuit board 46 in which electronic circuit components are mounted is fixed to a surface of a mounting plate 51. A cover 52 is so disposed outside the board 46 as to cover the entire board. A hydraulic control circuit and the board 46 having a stay 50 in which members are mounted. are placed in a bonnet. An interior of the bonnet becomes a relatively high temperature, and the board 46 is cooled by a fan 48 mounted at a motor 47 of an oil pump and heat dissipating fins Thus, an erroneous operation, a damage of the component due to heat can be alleviated. Further, since the fan 48 is driven by the motor 47 for the pump heretofore placed in a vehicle, it is not necessary to newly provide a motor for cooling and a low-cost cooler can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component cooling device, and more particularly to an electronic component cooling device for a vehicle equipped with a motor which is a part of vehicle control means and a vehicle control electronic component.

[0002]

2. Description of the Related Art Various electronic controls in an automobile are performed by control electronic components mounted on the automobile. Conventionally, the control electronic component is arranged in the dashboard of the vehicle because the malfunction or the thermal destruction of the circuit due to heat is likely to occur at high temperature. However, especially for control electronic components used for braking control and the like, it is difficult to route the wiring from the sensor provided in the hydraulic pipe or the like to the inside of the vehicle. Therefore, it is preferable to install the control electronic component in the hood, that is, in the engine room, in consideration of the wiring arrangement.

Therefore, it has been considered to arrange the control electronic components in the engine room and to provide a cooling device for the control electronic components in order to prevent malfunction of the circuit due to heat. However, if a cooling device for the control electronic components is newly installed separately, the cost will increase. It is an object of the present invention to enable low cost cooling of vehicle control electronic components located in places of relatively high temperature.

[0004]

An electronic component cooling device according to the present invention is an electronic component cooling device for a vehicle in which a motor which is a part of vehicle control means and a vehicle control electronic component are mounted. It has a fan attached to the vehicle, and the vehicle electronic components are placed in a position to receive the wind from the fan.

[0005]

In the electronic component cooling device according to the present invention, the fan is attached to the motor which is a part of the vehicle control means. The vehicle control electronics are cooled by this fan.
Here, a vehicle is usually provided with a power steering device, an antilock brake device, and the like. In these devices, a hydraulic pump is used to generate operating hydraulic pressure, and a motor is used for the hydraulic pump. Since the control electronic component is cooled by using the motor which is a part of the vehicle control means, it is not necessary to newly provide a motor for cooling. Therefore, the control electronic component can be placed at a place where the wiring can be easily handled, and the control electronic component can be cooled at low cost.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an anti-lock brake device to which an embodiment of the present invention is applied. This anti-lock brake device includes vehicle brakes 1 and 2 mounted on the left and right front wheels and left and right rear wheels of the vehicle, an operating section 3, and a hydraulic control circuit 4 for supplying braking hydraulic pressure to the vehicle brakes 1 and 2. It is mainly composed of. The left and right front wheels, the left and right rear wheels, the wheel brakes, and the hydraulic control circuit are basically similar in configuration, and therefore, the left rear wheel wheel brake 1, the right rear wheel wheel brake 2, and these brakes 1 are used. ，
Only the part of the hydraulic control circuit 3 related to 2 will be described below.

The wheel brakes 1 and 2 are provided with braking oil chambers 5 and 1, respectively.
5, pistons 6 and 16 operated by the braking hydraulic pressure supplied to the braking oil chambers 5 and 15, and brake shoes 7 and 17 connected to the pistons 6 and 16. The braking oil chambers 5 and 15 are connected to the hydraulic control circuit 4 by oil passages 11 and 12. The operation unit 3 is mainly configured by a brake pedal 8, a master cylinder 9 that generates a braking hydraulic pressure by a pedaling force that acts on the brake pedal 8, and a reservoir 10. Master cylinder 9 is oil passage 1
3, 14 are connected to the hydraulic control circuit 4.

The hydraulic control circuit 4 is provided for the wheel brakes 1 and 2.
The modulators 21 and 22 corresponding to are provided. Since these modulators 21 and 22 have basically the same structure, only one modulator 21 will be described below. The modulator 21 has a cylinder portion 23 having both ends closed and an intermediate portion partitioned by a partition wall 22, and pistons 24 and 25 at both end portions, and the partition wall 22 is slidable in the axial direction at a portion between the pistons 24 and 25. It is mainly composed of a rod 26 that is movably inserted. Partition wall 22
A primary braking hydraulic chamber 27 is formed between the first braking hydraulic chamber 27 and one of the pistons 24, and the primary braking hydraulic chamber 27 is operatively connected to the operating portion 3 via the oil passage 13. A secondary braking hydraulic chamber 29 is formed between the partition wall 22 and the other piston 25, and the secondary braking hydraulic chamber 29 is connected to the braking hydraulic chambers 5 of the wheel brakes 1 and 2 via the oil passages 11 and 12. , 15 are connected. One end wall of the cylinder portion 23 and one piston 24
An anti-lock braking hydraulic chamber 31 is formed between and, and a release oil chamber 32 is formed between the other end wall of the cylinder portion 23 and the other piston 25. The release oil chamber 32 communicates with the reservoir 10 via the oil passage 14. Also,
A spring 35 for urging the piston 25 in a direction away from the partition wall 22 is housed in the secondary braking hydraulic chamber 29, and a spring 36 for urging the piston 24 toward the partition wall 22 is housed in the antilock braking oil chamber 31. Has been done.

An oil passage 40 is provided in the antilock braking oil chamber 31.
Are connected. The oil passage 40 is connected to a hydraulic pump 42 via a normally closed inlet valve 41, and is connected to an oil tank 44 via a normally open outlet valve 43. An accumulator 45 is connected between the inlet valve 41 and the hydraulic pump 42.

The inlet valve 41 and the outlet valve 43 are solenoid valves, and their opening / closing operations are controlled by a circuit mounted on the control circuit board 46. The hydraulic pump 42 is connected to one shaft end of a motor 47 that is a drive source. As shown in FIG. 2, a fan 48 for cooling the control circuit board 46 is fixed to the other shaft end of the motor 47. The motor 47 is fixed to the flat portion 50a of the flat stay 50. Flat part 50a
Is bent vertically upward to form a vertical portion 50b. An opening 50c is formed in the vertical portion 50b, as shown in FIG. 3, which is a III-III cross section of FIG.
A mounting plate 51 is attached to the opening 50c. The mounting plate 51 is made of an aluminum material, and the surface is
A control circuit board 46 on which electronic circuit components are mounted is fixed. Further, on the back surface, a fan 51a for heat radiation is formed which extends through the opening of the mounting plate 51 toward the fan 48 side. The cover 5 is provided outside the control circuit board 46.
2 is arranged so as to cover the entire substrate. The hydraulic control circuit 4 and the control circuit board 46 including the stay 50 to which the above-mentioned members are mounted are mounted in the bonnet.

In the antilock brake device having such a structure, the antilock braking oil chamber 31 is opened to the oil tank 44 when the inlet valves 41 are closed and the outlet valves 43 are opened. When the brake pedal 8 is depressed, the primary braking hydraulic chamber 27
When the hydraulic pressure from the master cylinder 9 is supplied to, the volume of the secondary braking hydraulic chamber 29 decreases, and the wheel brakes 1, 2
The braking oil pressures corresponding to the oil pressure from the master cylinder 9 are supplied to the braking oil chambers 5 and 15.

On the other hand, when each inlet valve 41 is opened and each outlet valve 43 is closed, the antilock braking hydraulic pressure is supplied to the antilock braking hydraulic pressure chamber 31.
Therefore, although the hydraulic pressure from the master cylinder 9 acts on the primary braking hydraulic chamber 27, the volume of the secondary braking hydraulic chamber 29 increases, and the braking hydraulic chambers 5 and 5 of the wheel brakes 1 and 2 increase. The braking hydraulic pressure of 15 is reduced and the braking torque is weakened. Therefore, by opening each inlet valve 41 and closing each outlet valve 43 when the wheel is about to enter the locked state, it is possible to prevent the wheel from entering the locked state.

In such an anti-lock brake device, the wiring from the sensor for detecting the locked state of the wheels, the wiring for controlling the valves 41 and 43, and the wiring from the battery are connected to the control circuit board 46. To be done. In this embodiment, since the control circuit board 46 is arranged in the bonnet together with the hydraulic control circuit 4, it is easy to arrange each wiring.

Further, although the inside of the bonnet becomes relatively high in temperature, the control circuit board 46 is used for the motor 4 of the oil pump 42.
7, the fan 48 and the fin 51 for heat dissipation attached
It is cooled by a. Therefore, malfunction and destruction of the electronic component due to heat can be reduced. Further, since the fan 48 is driven by the oil pump motor 47 conventionally mounted in the vehicle, it is not necessary to newly provide a motor dedicated for cooling, and an inexpensive cooling device can be realized.

[Other Embodiments] (a) In the above embodiment, the control electronic component for controlling the antilock brake device is cooled.
The control electronic components for controlling different vehicle control devices, for example, four-wheel steering devices, may be cooled. Even in this case, for example, by using a motor used as a part of vehicle control means such as an oil pump, the control electronic component can be cooled with an inexpensive configuration. (B) In the above embodiment, the control circuit board 46 is arranged in the bonnet, but the position of the control circuit board 46 is not particularly limited to the bonnet.

[0016]

In the electronic component cooling device according to the present invention, the control electronic component is cooled by utilizing the motor which is a part of the vehicle control means. The control electronics can be cooled at low cost when placed in a relatively hot location.

[Brief description of drawings]

FIG. 1 is a schematic view of an anti-lock braking device adopting an embodiment of the present invention.

FIG. 2 is a front view of a cooling device.

FIG. 3 is a sectional view taken along line III-III of FIG.

[Explanation of symbols]

 42 oil pump 46 control circuit board 47 motor 48 fan

Claims (1)

[Claims] 1. An electronic component cooling apparatus for a vehicle, comprising a motor, which is a part of vehicle control means, and a vehicle control electronic component, comprising: a fan attached to the motor; An electronic component cooling device arranged at a position for receiving wind from the fan.