JP2903899B2 - Water-cooled brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-cooled brake device used in a vehicle.

[0002]

2. Description of the Related Art In a disk brake, when the temperature of the outside air is low and the temperature of the pad is low, there is a problem that the friction coefficient is reduced and the braking effect is deteriorated. Further, the vehicle may be used in a cold region, in which case icing may occur on the disk rotor or the like, and the braking force may decrease. These problems have been solved by providing a shroud in an exhaust pipe of an engine as disclosed in Japanese Patent Application Laid-Open No. 56-112348.
This can be eliminated by blowing the warm air in the shroud to the disc brake via the duct.

[0003]

The apparatus disclosed in the above publication has a problem that its effect is reduced by traveling wind during traveling, and a shroud and a duct are provided in an engine room only to solve the above problem. Must be provided, and there are also space and economic issues. SUMMARY OF THE INVENTION The present invention has been made to address the various problems described above, and a water cooling system in which a part of engine cooling water cooled by a radiator is guided to a pad of a disc brake and cooled, and then returned to the radiator. It is an object of the present invention to effectively utilize the configuration of the type brake device to improve the braking force shortage at low outside air temperature.

[0004]

In order to achieve the above-mentioned object, in the present invention, a part of engine cooling water cooled by a radiator is guided to a pad of a disk brake, cooled, and then returned to the radiator. In the above-described water-cooled brake device, a pump interposed in a cooling water circulation supply circuit to the pad, an outside air temperature detecting means for detecting a temperature of outside air, and a water temperature for detecting a temperature of the cooling water cooled by the radiator Detecting means, brake operation detecting means for detecting an operation state of the brake device, and cooling water in which the temperature of the outside air detected by the outside air temperature detecting means is equal to or lower than a predetermined value and which is detected by the water temperature detecting means. When the temperature is equal to or higher than a predetermined value, the pump is operated and the brake operation detecting means detects that the brake device is in the operating state. Provided pump control means for operating the can the pump.

[0005]

In the water-cooled brake device according to the present invention, when the temperature of the outside air drops below a predetermined value and the temperature of the cooling water rises above a predetermined value, the cooling water circulates to the pad of the disc brake. Since the pump interposed in the supply circuit operates, warm cooling water is circulated and supplied to the pads of the disc brake, and the pads are warmed by the cooling water. Accordingly, the temperature of the pad rises and ice icing on the disk rotor and the like is accurately eliminated, and the desired friction coefficient is obtained at the time of braking, so that a stable braking force can be obtained. Shortage can be improved.
Further, when the brake device is operated, the pump operates to supply the cooling water to the pad in a circulating manner, so that the pad is appropriately cooled and overheating of the disc brake is prevented. Further, the water-cooled brake device according to the present invention,
Since the configuration is made by effectively utilizing the basic configuration of the water-cooled brake device, it can be implemented compactly and inexpensively.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows the whole of a water-cooled brake device according to the present invention. In this water-cooled brake device, a part of cooling water cooled by a radiator 11 is diverted by a water inlet 12 and pumps 31 and It is configured to be guided to a pad 21 (specifically, a water jacket (not shown) formed on a back plate of the pad) of the disc brake 20 via a hose 32, and to a radiator via a hose 33 and a water outlet 13. It is configured to return to 11. In addition,
The cooling water cooled by the radiator 11 is, as is well known,
It is circulated and supplied mainly for cooling the engine 50.

The pump 31 includes a microcomputer 61
When the pump drive relay 62, which is activated by an output signal from the controller, is turned on, the pump drive relay 62 is stopped when the pump drive relay 62 is turned off. The microcomputer 61 starts the execution of the program corresponding to the flowchart of FIG. 2 by turning on the ignition switch S1, and ends the execution of the program by turning off the ignition switch S1.
Temperature sensor S2 for detecting the temperature T2 of the cooling water cooled by the radiator 11
3, connected to a brake switch S4 for detecting the operation state of the brake device, and the like.

In this embodiment constructed as described above, when the ignition switch S1 is turned on to start the engine 50, the microcomputer 61 executes a program corresponding to the flowchart of FIG. Is controlled as follows. For example, when the engine 50 is started, the brake device is not operated and the brake switch S4 is turned off, and the temperature T1 of the outside air detected by the outside temperature detection sensor S2 is 0 ° C. or less and the water temperature When the temperature T2 of the cooling water detected by the detection sensor S3 is lower than 30 ° C., the data from the switches S1 and S4 and the data from the sensors S2 and S3 read in step 101 of the program are used in step 102. It is determined as “NO” and step 1
03 is determined as “YES”, step 104 is determined as “NO”, a signal for turning off the pump drive relay 62 is output at step 105, and “YES” is determined at step 106. And return to step 101, steps 101, 102, 103, 104, 10
5, 106 are repeatedly executed. Therefore, in this case, the pump 31 is not driven, and the cooling water from the radiator 11 is not circulated and supplied to the pad 21 of the disc brake 20.

When the cooling water circulating in the radiator 11 is warmed by the engine 50 and the temperature T2 of the cooling water detected by the water temperature detecting sensor S3 becomes 30 ° C. or more, “YES” is determined in step 104. Done, step 1
At 07, a signal for turning on the pump drive relay 62 is output, and steps 101, 102, 103, 104, and 10 are output.
Steps 7 and 106 are repeatedly executed. Therefore, in this case, the pump 31 is driven and the warm cooling water from the radiator 11 is circulated and supplied to the pad 21 of the disc brake 20, and the pad 21 of the disc brake 20 is warmed by the cooling water. For this reason, the temperature of the pad 21 rises and ice icing on the disk rotor 22 and the like is accurately eliminated, and a desired friction coefficient is obtained at the time of braking, so that a stable braking force can be obtained. Deficiency of the braking force can be improved.

When the engine 50 is started, the brake device is not operated, the brake switch S4 is turned off, and the temperature T1 of the outside air detected by the outside air temperature sensor S2 exceeds 0 ° C. If you have
Although “NO” is determined in step 102, but “NO” is determined in step 103, step 1
At step 05, a signal for turning off the pump drive relay is output, and steps 101, 102, 103, 105, and 106 are output.
Is repeatedly executed. Therefore, in this case, the pump 31 is not driven, and the cooling water from the radiator 11 is not circulated and supplied to the pad 21 of the disc brake 20.

When the brake device is operated and the brake switch S4 is turned on, "YES" is determined in step 102, and the routine jumps to step 107. In step 107, the pump drive relay 62 is turned on. Are output, and steps 101, 102, 10
Steps 7 and 106 are repeatedly executed. Therefore, in this case, the pump 31 is driven and the cooling water from the radiator 11 is circulated and supplied to the pad 21 of the disc brake 20, and the pad 21 is appropriately cooled and the disc brake 2 is cooled.
Overheating at zero is prevented.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram schematically showing one embodiment of a water-cooled brake device according to the present invention.

FIG. 2 is a flowchart corresponding to a program executed by the microcomputer of FIG. 1;

[Explanation of symbols]

11 radiator, 20 disc brake, 21 pad, 31 pump, 61 microcomputer, 6
2: pump drive relay, S1: ignition switch, S2: outside air temperature detection sensor, S3: water temperature detection sensor,
S4: Brake switch.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16D 65/853 B60T 5/00

Claims (1)

(57) [Claims] 1. A water-cooled brake system in which a part of engine cooling water cooled by a radiator is guided to a pad of a disc brake and cooled and then returned to the radiator. An interposed pump, an outside air temperature detecting means for detecting a temperature of outside air, a water temperature detecting means for detecting a temperature of cooling water cooled by a radiator, and a brake operation detecting means for detecting an operation state of the brake device. When the temperature of the outside air detected by the outside air temperature detecting means is equal to or lower than a predetermined value and the temperature of the cooling water detected by the water temperature detecting means is equal to or higher than a predetermined value, the pump is operated and the brake operation is detected. Pump control means for operating the pump when the brake device is detected to be in the operating state by the means. Water-cooled brake device.