KR100494801B1 - brake oil cooling apparatus of a vehicle - Google Patents

Abstract

The present invention provides a brake fluid cooling device that operates by drawing power from a brake disc during braking, thereby providing an improved brake fluid cooling efficiency while maintaining the operational stability of a conventional hydraulic brake device without receiving additional power from the outside. It greatly improves the stability of the brake system.

Description

Brake oil cooling apparatus of a vehicle

The present invention relates to a cooling device for brake fluid used in a braking system of a vehicle, and more particularly, a technology for more effective cooling of the brake fluid by allowing the brake fluid to be actively cooled without an additional power source. It is about.

FIG. 1 illustrates a conventional brake device, which includes a brake pedal 100 that a driver manipulates with a foot, a power booster 102 that multiplies the operating force of the brake pedal 100, and the power booster 102. A caliper (108) having a master cylinder (104) for generating hydraulic pressure by a provided force, a hydraulically actuated piston (106) provided at the master cylinder (104), and a piston (106) of the caliper (108). It is composed of a brake pad 112 and the like for pressing the brake disc 110 of the wheel in a state bonded to the.

The brake device as described above, when the driver steps on the brake pedal 100, the force is multiplied by the power supply device 102 is provided to the master cylinder 104, the master cylinder 104 to apply the hydraulic pressure accordingly And the piston 106 is pressed into the cylinder 114 of the caliper 108, and the piston 106 presses the brake pad 112 toward the brake disc 110 by the hydraulic pressure provided as described above to generate a braking force. It is supposed to be.

However, the brake device as described above, when the brake fluid for transferring the hydraulic pressure generated from the master cylinder 104 to the cylinder 114 of the caliper due to frequent braking operation or sudden braking, overheating, bubbles are generated therein. In this case, there is a vapor lock phenomenon in which hydraulic pressure cannot be transmitted smoothly, and in such a case, a proper braking force cannot be obtained, which causes a fatal effect on the safety of the vehicle.

Conventionally, various methods have been proposed to prevent the above-mentioned vapor lock phenomenon. Among them, Japanese Patent Laid-Open No. 2000-103324 discloses a cylinder of a hydraulic pressure generating device 200 and a brake element as shown in FIG. A method is disclosed in which a complicated flow path including a separate hydraulic pump 204 and a valve 206 is provided between 202 to force circulation of the brake fluid to achieve cooling.

However, since the brake fluid itself is dispersed into the cooling flow path, the above-described method is disadvantageous in forming an appropriate hydraulic pressure during braking and may cause an unstable condition. Such a complicated flow path may cause breakage or leakage of the flow path. Since the hydraulic pump 204 increases and uses a separate power source, additional energy supply from the outside is required, and cooling is simply performed by circulating the brake fluid, which causes a problem that the cooling efficiency is not high.

Accordingly, the present invention has been made to solve the problems described above, so that without providing additional power from the outside, it is possible to provide an improved brake fluid cooling efficiency while maintaining the operation stability of the conventional hydraulic brake device as it is The object is to provide a brake fluid cooling device for a vehicle.

The brake fluid cooling apparatus of the present invention for achieving the object as described above is rotatably installed on the rotating shaft fixed to the brake pad, the driven rotating body is provided with a rotational force in contact with the brake disk during braking; A compressor driven by receiving rotational force from the driven rotating body; A condenser for cooling and liquefying a high temperature / high pressure refrigerant gas provided according to the operation of the compressor; A receiver for removing impurities contained in the refrigerant provided from the capacitor; An expansion valve for expanding a refrigerant provided from the receiver; And an evaporator installed in a cylinder of the caliper to pass the low temperature low pressure refrigerant provided from the expansion valve.

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Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 3 shows the configuration of a brake fluid cooling device of a vehicle according to the present invention, the schematic configuration of the operation from the brake disc, while having the essential components of the general cooling device using the heat of vaporization of the conventional refrigerant It is a configuration to obtain energy.

In other words, the rotary shaft 3 is installed on the brake pad 1 so that the state in which the braking force of the brake disk 5 is drawn out is switched according to the contact state between the brake pad 1 and the brake disk 5 during braking. A condenser 11 for cooling and liquefying a copper rotor 7, a compressor 9 driven by receiving rotational force of the driven rotor 7, and a high-temperature / high pressure refrigerant gas provided by the compressor 9. And a receiver 13 for removing impurities contained in the refrigerant provided from the condenser 11, an expansion valve 15 for expanding the refrigerant from the receiver 13, and an expansion valve 15. It consists of the evaporator 19 provided in the cylinder 17 of a caliper so that the refrigerant | coolant of low temperature low pressure may pass.

In the present embodiment, the driven rotary body 7 which draws out the rotational force from the brake disc 5 is composed of a pulley, and the evaporator 19 has a plurality of curved shapes in the cylinder 17 of the caliper as shown. It is arranged to circulate in the furnace so that the refrigerant passes through a long path, so that the brake fluid in the cylinder 17 of the caliper allows more heat exchange with the evaporator 19.

In the brake fluid cooling apparatus of the vehicle configured as described above, when the driver presses the brake pedal and the hydraulic pressure is provided from the master cylinder to generate the braking force while the brake pad 1 is pressed against the brake disc 5, the driven rotating body The compressor (7) rotates in contact with the brake disk (5) to drive the compressor (9) to suck / compress the refrigerant and send it to the condenser (11) in a gas state of high temperature / high pressure.

The refrigerant sent to the condenser 11 is cooled by the running wind of a vehicle or other separately provided fans, and is sent to the receiver 13 in the liquid phase. In the receiver 13, the moisture and dust contained in the refrigerant, Remove impurities.

The refrigerant passing through the receiver 13 rapidly expands in the expansion valve 15 to become a low-temperature / low-pressure refrigerant and flows into the evaporator 19, and from the brake fluid heated in the cylinder 17 of the caliper. After absorbing heat and vaporizing, it is circulated to the compressor (9).

Therefore, the brake fluid cooling device as described above does not draw out a separate flow path for changing the basic configuration of the conventional hydraulic brake device, and thus eliminates the problem of leakage of oil caused by a complicated hydraulic line and a problem of deterioration of operational stability. By the active cooling action using the heat of vaporization of the refrigerant, more effective cooling of the brake fluid is possible, and since the operation is made by the power drawn from the rotational force of the brake disk to be decelerated, there is an advantage that there is no separate power consumption. .

As described above, according to the present invention, it is possible to greatly improve the stability of the braking device by providing an improved brake fluid cooling efficiency while maintaining the operational stability of the conventional hydraulic brake device without receiving additional power from the outside.

1 is a view for explaining a brake device of a general vehicle,

2 is a configuration diagram of a brake fluid cooling apparatus of a vehicle according to the prior art;

3 is a configuration diagram showing a brake fluid cooling apparatus of a vehicle according to the present invention.

<Brief description of symbols for the main parts of the drawings>

One; Brake pad 3; Axis of rotation

5; Brake disc 7; Driven rotor

9; Compressor 11; Condenser

13; Receiver 15; Expansion valve

17; Cylinder 19; evaporator

Claims (3)

A driven rotary body rotatably installed on a rotation shaft fixed to the brake pads, the driven rotor being in contact with the brake disc to receive rotational force during braking; A compressor driven by receiving rotational force from the driven rotating body; A condenser for cooling and liquefying a high temperature / high pressure refrigerant gas provided according to the operation of the compressor; A receiver for removing impurities contained in the refrigerant provided from the capacitor; An expansion valve for expanding a refrigerant provided from the receiver; And an evaporator installed in the cylinder of the caliper to pass the low temperature low pressure refrigerant provided from the expansion valve. The method of claim 1, The driven rotor is a brake fluid cooling device of a vehicle, characterized in that consisting of a pulley. The method of claim 1, And the evaporator is circulated in a curved shape within the cylinder of the caliper to achieve heat exchange with the brake fluid in the cylinder.