KR100814555B1 - Assistant braking apparatus for pneumatic tire - Google Patents

Abstract

An assistant brake system of a pneumatic tire is provided to reduce braking distance by determining whether air in an inner tire is exhausted and by reducing air pressure of the tire during quick braking. An assistant brake system(100) of a pneumatic tire comprises a rim(2) mounted on a tire, a pneumatic tire(3) mounted on the rim for mounting on the tire, an inner tire(113) mounted inside a space surrounded with the rim and the pneumatic tire and a unit for reducing air pressure of the inner tire according to a driving condition of a vehicle mounted with the pneumatic tire.

Description

Pneumatic Tire Assist Braking System {ASSISTANT BRAKING APPARATUS FOR PNEUMATIC TIRE}

1 is a perspective view of a pneumatic tire auxiliary braking apparatus according to the present invention.

Figure 2 is a cross-sectional view showing the shape of the pneumatic tire auxiliary braking apparatus according to the present invention while the vehicle is driving.

3 is a cross-sectional view showing the air discharge of the pneumatic tire auxiliary braking apparatus according to the present invention.

Figure 4 is a cross-sectional view showing the air injection of the pneumatic tire auxiliary braking apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: pneumatic tire auxiliary braking device 112: protrusion

113: internal tire 120: air moving means

123: opening 124: horizontal tube

125: vertical pipe 126: air outlet

127: control rod 128: spring

129: valve core 129a: inner rod

129b: protrusion X: stopper

130: control means 131: power supply

132: control unit 133: connecting line

The present invention relates to a pneumatic tire auxiliary braking apparatus, and more particularly, by determining whether or not the internal tires are discharged during rapid braking at the time of operation of ABS, which is an automobile braking system, to lower the air pressure of the tire, The present invention relates to a pneumatic tire auxiliary braking device that instantly increases tire ground area and thereby reduces tire braking distance.

In general, a tire braking device causes a tire to cause friction with a road surface by the action of a brake to decelerate and stop the vehicle.

However, when the vehicle intends to stop in this way, the vehicle does not stop immediately at the moment of brake operation, but under the force at the time of driving, the vehicle stops after sliding a certain distance. The distance slipped after the brake operation is called the braking distance.

The shorter the braking distance, the higher the stability is because the brake operation time and the vehicle stop time are closer.

In the related art, in order to reduce the braking distance, it is known that the auxiliary braking apparatus is mounted on the vehicle.

For example, in Korean Patent Laid-Open No. 2001-0102900, a friction plate having friction protrusions is mounted on a vehicle so as to reduce the braking distance of the vehicle. The friction plate is configured to be inserted between the tire and the road surface during braking of the vehicle to increase the frictional force with the road surface. However, when the friction plate is not mounted between the tire and the road surface in accordance with braking of the vehicle, there is a fear that the friction plate will be pushed back by the tire and hit the vehicle body. In addition, since the vehicle is to be mounted separately, when the friction plate is mounted on the produced vehicle without considering the weight of the friction plate, the vehicle may be deformed.

In addition, Korean Patent Laid-Open Publication No. 2003-0020820 uses a vacuum generator to adsorb a road surface to instantly impart a vertical load, and to increase a force against an inertial force that causes a braking distance. When the vacuum force generated by the vacuum generator forms the space inside the suction plate below atmospheric pressure, the vertical load is generated by the difference between the atmospheric pressure and the vacuum pressure inside the suction plate, and the brush pins installed on the bottom of the suction plate generate additional frictional force. have. However, these road adsorption brakes have to be able to control the weight of the vehicle as a whole, so there is a lot of power consumption to operate, which can reduce the fuel economy of the vehicle.

In addition, Korean Patent Publication No. 199-0019841 discloses that when the vehicle is suddenly braked, the auxiliary wheel descends from the vehicle body to detect the sliding state of the vehicle, and when the vehicle is severely slipped, the wheel tire is rotated in reverse to brake the distance. To reduce it. However, the related art has a limitation in that a contact accident with a rear vehicle may occur when the reverse rotation of the wheel tire occurs even after the vehicle stops without a safety distance between the vehicles being secured.

The present invention determines whether to discharge the air during braking at the time when ABS, the automobile braking system, operates, thereby lowering the air pressure of the tire during sudden braking, thereby instantaneously widening the tire ground area, thereby reducing the tire braking distance. For the purpose of

In order to achieve the above object, the present invention provides a pneumatic tire auxiliary braking device comprising: an inner tire mounted on an outer circumferential surface of a rim along a tire circumferential direction; An air passage consisting of a horizontal tube having an end portion formed with an opening portion and another end portion thereof, a vertical tube connecting the horizontal tube and the inner tires in fluid communication with each other, and a hole formed in the horizontal tube, the vertical tube being centered in a straight line. An air moving unit comprising an air outlet connected to the air outlet and a control rod configured to open and close the air outlet by sliding in a horizontal tube of the air passage; It includes a control unit for determining the position of the control rod when the ABS is operated.

The inner tire mounted on the outer circumferential surface of the rim inside the tire is characterized in that it is mounted between a pair of opposing grooves formed on the outer circumferential surface of the rim.

In addition, the horizontal tube is characterized in that the end formed with the opening is formed so as to penetrate the wheel.

In addition, the horizontal tube is characterized in that the valve core is mounted in the end portion formed with the opening.

In addition, the horizontal tube is characterized in that the end portion of which the opening is formed is screwed by a stopper and hermetically sealed.

In addition, the control rod, characterized in that the opening of the horizontal tube and the inner tire is formed in fluid communication with the straight pipe formed so that the air outlet and the inner tire in fluid communication.

In addition, a tire mounting rim; A pneumatic tire mounted to said tire mounting rim; An inner tire mounted in a space surrounded by the rim and the pneumatic tire; And means for reducing the air pressure of the inner tire according to the driving conditions of the vehicle equipped with the pneumatic tire.

Hereinafter, with reference to the drawings will be described in more detail with respect to the present invention pneumatic tire auxiliary braking device.

1 is a partial perspective view of a tire equipped with a pneumatic tire auxiliary braking apparatus according to the present invention, Figure 2 is a cross-sectional view showing the shape of the pneumatic tire auxiliary braking apparatus according to the present invention when the vehicle is driving, Figure 3 4 is a cross-sectional view showing the air discharge of the pneumatic tire auxiliary braking apparatus according to the present invention, Figure 4 is a cross-sectional view showing the air injection of the pneumatic tire auxiliary braking apparatus according to the present invention.

The pneumatic tire auxiliary braking device 100 according to the present invention includes an inner tire 113 mounted on an outer circumferential surface 2b of the rim 2 along a tire circumferential direction; An air passage including a horizontal tube 124 having an end portion formed with an opening portion 123 and another end portion thereof, a vertical tube 125 connecting the horizontal tube 124 and the inner tire 113 to be in fluid communication; A hole formed in the horizontal pipe 124, and configured to open and close the air outlet by sliding in the horizontal pipe 124 of the air passage and the air outlet 126 is in a straight line with the center of the vertical pipe 125 An air moving unit 120 formed of a control rod 127; And a control unit 132 for determining a position of the control rod 127 when the ABS is operated. Although other devices are provided in the horizontal pipe 124 of the pneumatic tire auxiliary brake device 100 according to the present invention, in order to examine the shape of the pipe, FIG. 1 is shown with the devices removed.

ABS (Anti-Lock Brake System) is a device that can maintain the direction of the vehicle stably without stopping the tire rotation completely even when braking the car on the slippery road by electronic control. A normal braking system brakes a vehicle and stops the rotation of the wheels completely, causing the vehicle to slide sideways, causing dangerous accidents, because the tires lose their orientation. Therefore, ABS can shorten the braking distance because it stops the vehicle by comparing the deceleration of both tires by detecting the deceleration of the body and the rotation of the tire without completely stopping the tire's rotational movement so that the tire does not lose its direction. System.

In general, if the tire air pressure is maintained at an optimal state, stability and comfortable riding comfort are obtained while driving. However, when the tire is driven with air pressure lower than the proper pressure, the friction coefficient of the tire increases, so that the fuel economy of the vehicle increases and the speed of the vehicle may be slowed down.

For example, it can be seen that when the vehicle is driven, the steering wheel is pulled out when the air pressure of one of the four tires is low. This is because the friction coefficient of the tire with lower air pressure is increased compared to the remaining tires, and the tire diameter is reduced.

As described above, the pneumatic tire auxiliary braking apparatus 100 according to the present invention, which uses the relationship between the tire and the road surface according to the pneumatic pressure, provides air through the control means 130 when the vehicle suddenly brakes while traveling at a predetermined speed or more. After determining whether it is discharged at the time of operation of the ABS, which is a vehicle braking system, the control rod 127 of the air moving unit 120 is changed, thereby instructing to discharge the air in the inner tire 113. .

As a result, when the air pressure of the tire is lower than the proper air pressure, the contact area between the tire and the road surface becomes wider, thereby increasing the friction coefficient and reducing the braking distance of the vehicle.

As shown in FIG. 2, the pneumatic tire auxiliary braking apparatus 100 according to the present invention includes an internal tire by mounting a valve core 129 in an end portion of the horizontal tube 124 having an opening 123 formed therein. 113) prevent air from leaking. In addition, the end of the horizontal tube is screwed by the stopper (X), it can be seen that the opening 123 of the horizontal tube 124 is double sealed. According to the type of tire, the proper air pressure in the tire is different, but the pneumatic tire provided with the pneumatic tire auxiliary braking device 100 according to the present invention first injects air into the inner tire 113, and then adjusts the air pressure according to the proper air pressure of the tire. Inject This is because when the air is injected into the tire by adjusting the tire air pressure in the same order as described above, when the air pressure of the inner tire 113 is reduced, the air pressure of the entire tire is also reduced.

In addition, the inner tire 113 is fastened to the protrusion 112 formed on the rim so that air can be injected into the inner tire 113. By attaching both ends of the inner tire 113 to the outer circumferential surface 2b of the rim, air can be injected into the inner tire 113 in the same manner as to allow the air to enter the inside of the tire. The protrusion 112 is illustrated for easy understanding that the inner tire 113 is mounted on the outer circumferential surface 2b of the rim.

When the vehicle equipped with the pneumatic tire auxiliary braking apparatus 100 according to the present invention stops suddenly, as shown in FIG. 3, a straight pipe 127b is disposed between the vertical pipe 125 and the air outlet 126. In this case, as the air in the inner tire 113 is discharged to the outside through the air outlet 126, the tire air pressure is lowered. Air discharge and injection of the pneumatic tire auxiliary brake device 100 is performed by controlling the position of the control rod 127, the position control of the control rod 127 is made using a solenoid valve.

The solenoid valve converts electrical energy into mechanical energy using an electromagnetic force. That is, when a current flows through the solenoid and a magnetic field is formed, it pulls nearby iron objects. Using this property, it is possible to make a valve that can control the opening and closing of a pipe by an electrical signal. A method of operating the solenoid valve will be described with reference to one embodiment shown in FIG. 3.

After the ABS operation, when the air discharge command is sent from the control unit 132 to the power supply unit 131 through the connection line 133, the power supply of the power supply unit 131 is cut off, the spring 128 is separated from the power supply unit 131 As a result, the straight pipe 127b forms a straight line with the vertical pipe 125 so that the air in the inner tire is discharged. In addition, when the control unit 132 sends an air discharge prohibition command to the power supply unit 131, the power supply of the power supply unit 131 is turned on again, and the spring tube 128 comes into contact with the power supply unit 131. The control rod 127 is moved to a position where the opening 123 and the inner tire 113 of the horizontal tube 124 is in fluid communication. In this case, the spring 128 may be installed to be coupled to the power supply unit 131, but also serves to mitigate impact when the control rod 127 is moved toward the power supply unit 131.

In order to inject air back into the inner tire 113 from which air is removed, as shown in FIG. 4, power is supplied to the power supply unit 131, and the bending pipe 127a of the control rod 127 is connected to the horizontal pipe ( After the opening 123 and the inner tire 113 of the 127 is moved to the fluid communication position, the stopper X is opened and air is injected through the valve core 129. The valve core 129 serves as a check valve. That is, although air may be injected into the inner tire 113 through the opening 123, the air in the inner tire 113 may not flow back to the opening 123.

To inject air into the inner tire 113 while the valve core 129 is installed in the end of the opening 123 located in the horizontal pipe 124, as shown in FIG. 4, the tire valve core 129 Press the end of the inner rod (129a). When the inner rod 129a is pressed, air is injected into the inner tire 113 while the air is moved into the gap while the protrusion 129b of the valve core 129 rises.

In the above, a preferred embodiment of the pneumatic tire auxiliary braking apparatus according to the present invention has been exemplarily described, but the present invention is not limited thereto, and a person having ordinary skill in the art will have the scope of the technical idea of the present invention. Many variations and modifications may be made without departing from the scope thereof.

By using the pneumatic tire auxiliary braking apparatus of the present invention, by lowering the air pressure of the tire, the tire ground area is instantaneously widened, thereby reducing the tire braking distance. In addition, by reducing the braking distance with the anti-lock braking system (ABS), the vehicle can be stopped close to the point where the driver wants to stop the vehicle. It can be prevented.

Claims (8)

delete delete delete An inner tire mounted to an outer circumferential surface of the rim along a tire circumferential direction; An air passage consisting of a horizontal tube having an end portion formed with an opening portion and an other end portion, a vertical passage connecting the horizontal tube and the inner tire to be in fluid communication, and a hole formed in the horizontal tube, in which the vertical tube and the center are connected in a straight line Air moving means comprising an air discharge port and a control rod configured to open and close the air discharge port by sliding in a horizontal tube of the air passage; And a control unit for determining the position of the control rod when the AAS is operated, The horizontal tube, A tire auxiliary braking device, characterized in that the valve core is mounted in the end formed with the opening. The method of claim 4, wherein The horizontal tube, Tire end brake device, characterized in that the end is formed in the opening is screwed by a stopper tightly sealed. An inner tire mounted to an outer circumferential surface of the rim along a tire circumferential direction; An air passage consisting of a horizontal tube having an end portion formed with an opening portion and an other end portion, a vertical passage connecting the horizontal tube and the inner tire to be in fluid communication, and a hole formed in the horizontal tube, in which the vertical tube and the center are connected in a straight line Air moving means comprising an air discharge port and a control rod configured to open and close the air discharge port by sliding in a horizontal tube of the air passage; And a control unit for determining the position of the control rod when the AAS is operated, The control rod, Pneumatic tire auxiliary braking device, characterized in that the opening of the horizontal tube and the inner tire is formed in fluid communication with the straight pipe formed so that the air outlet and the inner tire in fluid communication. delete The method of claim 4, wherein The horizontal tube, Tire end brake device, characterized in that the end is formed so that the opening is formed through the wheel.

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