KR20080009442A - A caliper cooling device of disk brake system - Google Patents

Abstract

An apparatus for cooling a caliper for a disk brake is provided to forcedly cool the caliper by attaching a thermoelectric cooling unit having a peltier device on a calipers-housing to receive current signals proportional to braking pressure. An apparatus for cooling calipers for a disk brake comprises a thermoelectric cooling unit(109), a high capacity condenser(7) and a hydraulic sensor(9). The thermoelectric cooling unit has a thermoelectric device(17) attached to one side of a calipers-housing(105). The thermoelectric device receives input current from a generator(5) according to a control of a controller(3) to cause heat absorption and heat radiation, thereby forcibly cooling the calipers-housing. The high capacity condenser is provided on a circuit, which supplies input current to the thermoelectric cooling unit, to temporarily store electric energy. The hydraulic sensor is provided at a hydraulic line to detect operational liquid pressure and output signal based on the pressure to the controller.

Description

Caliper chiller for disc brakes {A CALIPER COOLING DEVICE OF DISK BRAKE SYSTEM}

1 is a perspective view of a typical disc brake caliper.

2 is a cross-sectional view of a general disc brake caliper.

3 is a cross-sectional view of a disc brake caliper to which a cooling device according to an embodiment of the present invention is applied.

The present invention relates to a caliper cooling device for a disc brake, and more particularly, a thermoelectric cooling unit using a peltier element is attached to one side of a caliper housing to receive a current signal proportional to the brake braking pressure, thereby enabling forced cooling of the caliper. It relates to a caliper cooling device for a disc brake.

In general, a disc brake is a braking device that generates a braking force by using a brake pad, which is a friction material, to a disk-shaped disk that rotates integrally with a wheel, and generates a braking force. As shown in FIG. 1, a disc brake is connected to a drive shaft. The two brake pads 101 which are strongly rubbed on both sides of the disk 100 are installed in the caliper housing 105 of the caliper 103 and are configured to be pressurized by a piston 107 operated by hydraulic pressure.

That is, such a disc brake, when the driver presses the brake pedal, the force strengthened through the booster is transferred into the caliper housing 105 through the brake fluid to push the piston 107 and the brake pad 101 having a constant coefficient of friction. Pressurizes and rotates the disk 100 to generate a frictional force.

At this time, the kinetic energy lost by braking is converted into heat energy and is emitted into the air through the caliper 103 or the wheel. As such, effectively dissipating heat generated by braking in the air is one of the important goals of the brake design, but in reality, there is not much freedom to change the design to improve the heat dissipation performance because the brake structure is inside the wheel. not.

In particular, when braking, the heat generated during the long hills or continuous braking exceeds the limit of the heat dissipation performance of the brake system, it causes various problems in the brake system.

That is, the fade (friction deterioration) phenomenon due to the high temperature of the brake pad 101, the burnout of rubber parts such as the piston boots, and the most serious problem are vapor lock phenomenon in which the brake fluid boils and the braking pressure is sharply reduced, which is serious for the safety of the vehicle. Will be affected.

In order to solve this problem, there is a method of increasing the heat dissipation performance of the brakes or increasing the heat capacity of the system, that is, the size of the system. However, firstly, the disc and the caliper, which generate heat, are structurally inside the wheel. There is a limit to cooling, and increasing the second brake size likewise implies that the disc and caliper must fit inside the wheel, which is difficult to solve without the wheel itself becoming large.

Therefore, the present invention was created in order to solve the above problems, and an object of the present invention is to attach a thermoelectric cooling unit using a Peltier element to one side of the caliper housing and receive a current signal proportional to the brake braking pressure of the caliper. It is to provide a caliper cooling device for a disc brake that enables forced cooling.

In the disc brake caliper cooling device of the present invention for achieving the above object, two brake pads that are rubbed on both sides of the disc connected to the drive shaft are installed in the caliper housing and pressurized by a piston operated by hydraulic pressure in the hydraulic chamber. In the caliper assembly for a disc brake configured to be,

A thermoelectric cooling unit attached to one side of the caliper housing and configured to receive an input current from a generator under the control of a controller and cause heat absorption and heat dissipation to forcibly cool the caliper housing; A large capacity condenser configured on a circuit for supplying an input current from the generator to the thermoelectric cooling unit to temporarily store electrical energy; A hydraulic pressure sensor configured on one side of a hydraulic line for supplying hydraulic pressure to the hydraulic chamber in the caliper housing, detecting a hydraulic pressure and outputting a signal to the controller; Characterized in that it comprises a.

The thermoelectric cooling unit is a heat absorbing portion attached to one side of the caliper housing; A heat dissipation unit attaching a plurality of heat dissipation fins to an outer surface; It is configured between the heat absorbing portion and the heat dissipating portion, characterized in that it is composed of a Peltier element portion that generates heat absorbing phenomenon to the heat absorbing portion side by the input current, and heat radiation phenomenon to the heat radiating portion side.

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

3 is a cross-sectional view of a disc brake caliper to which a cooling device according to an embodiment of the present invention is applied.

In the description of the configuration of the present invention, however, the same components as those in the prior art will be described with the same reference numerals.

In the disc brake caliper 103 to which the cooling device according to the embodiment of the present invention is applied, two brake pads 101 which are rubbed on both sides of the disc 100 connected to the drive shaft are installed in the caliper housing 105 to provide hydraulic pressure. It is configured to be pressurized by a piston 107 which is operated by hydraulic pressure in the chamber 109.

In the caliper assembly of this configuration, the cooling device of the present invention is a thermoelectric cooling unit (1) is attached to one side of the caliper housing 105 receives the input current from the generator (5) under the control of the controller (3) It is configured to force the cooling of the caliper housing 105 by causing endothermic and heat dissipation.

The thermoelectric cooling unit 1 includes a heat absorbing part 11 attached to one side of the carrier housing 105 and a heat radiating part 15 attaching a plurality of heat radiating fins 13 to an outer side thereof and the heat absorbing part. It consists of the Peltier element part 17 comprised between the part 11 and the heat radiating part 15. FIG.

Here, the heat absorbing portion 11 is preferably made of a ceramic plate member, and the heat radiating portion 15 is also preferably made of a ceramic plate member.

In addition, the Peltier element part 17 generates heat absorption on the heat absorbing portion 11 side by the input current and heat radiation on the heat radiating portion 15 side. It is preferable that the type semiconductor 23 is connected in series by the conductor 25.

Here, the conductor 25 is preferably made of a copper material.

On the circuit for supplying the input current from the generator 5 to the Peltier element unit 17 of the thermoelectric cooling unit 1, a large capacity capacitor 7 is configured to temporarily store electrical energy.

In addition, the hydraulic chamber 109 in the caliper housing 105 is configured on one side on the hydraulic line 27 for supplying hydraulic pressure to detect the hydraulic pressure and output the signal to the controller 3. Is composed.

Therefore, the operation of the disc brake caliper cooling device having the above configuration allows the controller 3 to control the input current input to the Peltier element part 17 in accordance with the signal of the hydraulic pressure sensor 9 which is proportional to the braking force. do.

That is, when the braking force is weak (when the hydraulic pressure is weak), the input current is reduced to the Peltier element portion 17 to reduce the braking shock, and the higher the braking force (higher hydraulic pressure) to the Peltier element portion 17 Increase the input current amount to control the braking feeling.

Generator 5 disposed in the engine drive line in the above will be able to use the existing alternator in common.

In addition, since the amount of current generated by the generator 5 is inversely proportional to the vehicle speed and the braking pressure is constant according to the vehicle speed, when a current is supplied from the generator 5 directly to the Peltier element unit 17 during braking, Braking shock is generated to reduce the feeling of braking, the end of the braking has a problem that the forced cooling effect is lowered because the amount of current by the generator 5 is reduced by reducing the vehicle speed.

However, the hydraulic sensor 9 which outputs a signal proportional to the braking force and the large capacity condenser 7 connected in parallel to the generator 5 peltier current proportional to the brake braking pressure (hydraulic pressure) under the control of the controller 3. It inputs to the element part 17, and it can supply sufficient electric current for forced cooling of the caliper 103 by the end of braking.

That is, when the braking pressure (liquid pressure) is low, the amount of current supplied to the Peltier element unit 17 is small, so that the regenerative braking effect is small, and the remaining electricity is temporarily stored in the large capacity capacitor 7.

When the braking pressure (liquid pressure) is high, the amount of current supplied to the Peltier element unit 17 is increased. At this time, the electricity stored in the condenser 7 is discharged to maximize the regenerative braking effect so as to realize a braking feeling that matches the driver's expectation. do.

Therefore, in the present invention, a part of the kinetic energy by braking is converted into electrical energy by regenerative braking and the heat generated by braking is supplied to the Peltier element unit 17 by forced cooling of the caliper 103. The braking effect in the electrical energy conversion process can reduce heat generation of the brake system, thereby effectively lowering the temperature of the brake system as a whole and constructing a highly efficient brake system even with a relatively small brake. .

According to the caliper cooling device for disc brakes as described above, the thermoelectric cooling unit using the Peltier element is attached to one side of the caliper housing to receive a current signal proportional to the brake braking pressure to enable forced cooling of the caliper. The heat dissipation performance can be improved without increasing the size to prevent the conventional fade phenomenon, burnout of rubber parts such as piston boots, and vapor lock phenomenon.

Claims (6)

In the caliper assembly for a disc brake, two brake pads, which are rubbed on both sides of the disc connected to the drive shaft, are installed in the caliper housing and configured to be pressed by a piston operated by hydraulic pressure in the hydraulic chamber. A thermoelectric cooling unit attached to one side of the caliper housing and configured to receive an input current from a generator under the control of a controller and cause heat absorption and heat dissipation to forcibly cool the caliper housing; A large capacity condenser configured on a circuit for supplying an input current from the generator to the thermoelectric cooling unit to temporarily store electrical energy; And a hydraulic pressure sensor configured at one side on a hydraulic line for supplying hydraulic pressure to the hydraulic chamber in the caliper housing, detecting a hydraulic pressure and outputting a signal to the controller. The method of claim 1, The thermoelectric cooling unit An endothermic portion attached to one side of the caliper housing; A heat dissipation unit attaching a plurality of heat dissipation fins to an outer surface; And a Peltier element unit configured between the heat absorbing unit and the heat dissipating unit to generate heat absorbing phenomenon toward the heat absorbing unit by an input current and heat radiation phenomenon toward the heat radiating unit. The method of claim 2, The heat absorbing portion is a disc brake caliper cooling device, characterized in that the ceramic plate member. The method of claim 2, The heat dissipation unit is a disc brake caliper cooling device, characterized in that made of a ceramic plate member. The method of claim 2, The Peltier element unit is a caliper cooling device for a disc brake, characterized in that a plurality of P-type semiconductor and N-type semiconductor is connected in series by a conductor. The method of claim 5, The conductor is a caliper cooling device for a disc brake, characterized in that the copper material.

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