KR0167917B1 - Auxiliary brake system of a vehicle - Google Patents

Abstract

In case the main brake system brakes suddenly due to obstacles appearing in front of the driving vehicle, the braking distance is shortened by increasing the friction and ground area with the ground to prevent the vehicle body from slipping by slippage of the ground and tires. To prevent the occurrence of an accident. To this end, the present invention is the brake pedal switch 5 on / off by the operation of the brake pedal 1, the distance sensor 6 and the wheel for measuring the distance between the vehicle and the obstacle appearing in front of the wheel The wheel rotation speed sensor 7 which measures the rotation speed, the ECU which predicts the collision with an obstacle by analyzing the signals of the distance sensitive sensor, the wheel rotation speed sensor and the brake pedal switch, and the signal sent from the ECU An auxiliary brake device for a motor vehicle is proposed, which consists of an air bag (8) that is inflated to contact / friction with the ground.

Description

Automobile auxiliary brake

1 is an overall configuration showing an auxiliary brake device of a vehicle according to the present invention.

Figure 2 shows the main part of the present invention, the braking state of the auxiliary brake device.

* Explanation of symbols for main parts of the drawings

4: tire 5: brake pedal switch

6: distance sensor 7: wheel speed sensor

8: air bag 9: axle

10: friction pad

Technical Field of the Invention

The present invention relates to an auxiliary brake device for an automobile, and more particularly, to an auxiliary brake device for reducing a braking distance by increasing a friction area with the ground together with a tire stopped by a main brake during sudden braking.

[Private Technology]

In general, a vehicle is equipped with a brake device to maintain a decelerating, stopped, and parked state of a driving vehicle, and the brake device uses frictional force to convert the kinetic energy of the vehicle into thermal energy and release the energy to the atmosphere. Friction brakes are used mainly for braking.

The brake device requires certainty of operation, reliability and durability, and ease of inspection and adjustment. In particular, as a high performance automobile and high speed roads with a uniform road surface are constructed, the vehicle can be driven at high speed, and the reliability of the braking force of the brake device is further emphasized. As such a brake device, a pneumatic brake using pneumatic and a hydraulic brake using hydraulic pressure are frequently used.

The hydraulic brake may include a brake pedal, a booster connected to the brake pedal to boost pedal effort, a master cylinder connected to the booster to generate hydraulic pressure, and connected to the master cylinder and uniform to the front and rear brakes. It consists of an oil distributor that delivers hydraulic pressure.

When the hydraulic brake is configured by the driver, the booster and the master cylinder are operated in conjunction with the operation of the brake pedal, and the hydraulic pressure generated by the cylinder is uniformly adjusted by the oil distributor so that the front and rear wheels It is supplied to the brake cylinder and then brakes the vehicle by operating the brake body.

On the other hand, the brake body is braked by contacting the friction pads on both sides of the drum-type brake consisting of a wheel cylinder, a brake shoe and a back plate on which they are installed, and a brake drum, and a disk plate rotated together with the wheels of the vehicle. There is a disc brake.

[Technical problem to be achieved]

In the above-described brake device, the braking performance is influenced by the pressure of the brake pedal, the uniform braking pressure of the brake cylinder, the friction force of the brake body, the friction force of the ground and the tire, the ground area, and the like.

However, during the braking of the vehicle, even if the rotation of the wheel is stopped by the driver's quick manipulation, the vehicle is pushed out by inertia, so that slip occurs between the tire and the ground, so that the braking distance of the vehicle becomes longer. Accordingly, there is a problem that an accident that hits a pedestrian or a collision with a preceding vehicle occurs. In addition, the conventional brake device has a problem that the princess distance, which is a determinant of the stopping distance, becomes long because the inertia driving state continues for a time from the accelerator (or acceleration) pedal to the brake pedal when the driver's pedaling force is moved. .

The present invention has been made to solve the problems of the prior art, the present invention is operated together with the main brake in the braking of the vehicle, thereby increasing the friction and ground area with the ground, thereby reducing the braking distance of the vehicle and accident To prevent them in advance. In addition, another object of the present invention is to observe the situation in front of the vehicle, when the preceding vehicle or pedestrian is approached within a certain distance, even if the driver does not recognize this, it is possible to shorten the stopping distance of the vehicle .

[Configuration and Function of Invention]

As a means for realizing the above object, the present invention proposes an auxiliary brake device for a vehicle having a configuration described below.

That is, the present invention provides a brake pedal and a hydraulic power unit interlocked with the brake pedal, a master cylinder connected to the hydraulic power unit to generate hydraulic pressure, and a brake operated by hydraulic pressure generated from the master cylinder to contact / friction the wheel. A main brake system including a main body, comprising: a brake pedal switch on / off by operation of the brake pedal, a distance sensor for measuring a distance between a vehicle and an obstacle appearing in front of the vehicle, and a rotation speed of a wheel A wheel speed sensor for measuring a signal, an electronic control unit (ECU) that analyzes signals of the distance sensor, the wheel speed sensor, and a brake pedal switch to predict collision with an obstacle, and a signal sent from the ECU And an air bag inflated to contact / friction with the ground.

In addition, the auxiliary brake device of the present invention is a distance-sensitive sensor for measuring the distance between the vehicle and the obstacle appearing in front of the wheel, the wheel rotational speed sensor for measuring the rotational speed of the wheel and the distance-sensitive sensor and the wheel rotational speed sensor It consists of an ECU that analyzes the signal and anticipates a collision with an obstacle, and an airbag that is inflated by the signal sent from the ECU and contacts / frictions with the ground.

The airbags are installed on the front and rear axles, and preferably, four airbags should be installed in close proximity to the wheels to prevent the vehicle body from braking. However, the airbags are not limited thereto and may be installed at the front and rear sides, respectively.

According to this configuration, in the auxiliary brake device of the present invention, when an obstacle appears in front of the vehicle and the driver recognizes it and brakes rapidly, the ECU calculates the distance between the vehicle speed and the obstacle, and if the collision is expected, By inflation and friction with the ground with the main brake, the braking distance of the vehicle is shortened and accidents are prevented.

In addition, in the auxiliary brake device of the present invention, when an obstacle, for example, a preceding vehicle or a pedestrian appears in front of the vehicle and the driver is not aware of it, the ECU calculates the distance between the vehicle speed and the obstacle, and if a collision is expected, Activate the bag to allow the vehicle to brake automatically.

EXAMPLE

Best Mode for Carrying Out the Invention Preferred embodiments for realizing the present invention will now be described in detail with reference to the accompanying drawings.

Example 1

FIG. 1 is an overall configuration diagram showing an auxiliary brake device for a vehicle according to the present embodiment, and FIG. 2 is a diagram showing the main parts of the present embodiment, showing a braking state of the auxiliary brake device.

As can be seen from the drawings, the auxiliary brake device of the present embodiment is connected to the brake pedal 1, the power booster 2 linked to the brake pedal 1, and the power booster 2 to generate hydraulic pressure. It is installed together with the main brake system composed of the brake master cylinder (3) and a brake body (not shown) which is operated by the hydraulic pressure generated by the master cylinder (3) and is in contact with / friction with the disk or drum of the wheel. Here, in the auxiliary brake device of the present embodiment, when an obstacle appears in front of a driving vehicle and the main brake device is suddenly braked, the auxiliary brake device is contacted and rubbed with the ground along with the tire 4 which is in contact with the ground and is grounded. It consists of separate braking means to enlarge the area.

More specifically, the auxiliary brake device includes a brake pedal switch 5 that is turned on / off in conjunction with the operation of the brake pedal 1 and is turned on when the brake pedal 1 is operated by a driver. The apparatus further includes a distance sensitive sensor 6 for measuring the distance between the vehicle and an obstacle appearing in front of the vehicle, and a wheel rotation speed sensor 7 for measuring the speed of improvement of the wheel (or tire) 4.

The brake pedal switch 5, the distance sensitive sensor 6 and the wheel rotational speed sensor 7 are connected to an ECU which is connected to the brake pedal switch 5, the distance sensitive sensor 6 and the wheel rotation. By analyzing the signal transmitted from the speed sensor 7, it is determined whether the collision with the obstacle appearing in the front while the main brake is activated by the driver.

The ECU is connected to an air bag 8 which is in substantially contact with and ground with the ground. The air bag 8 receives an electric signal sent from the ECU when a collision of the vehicle is expected and the electric primer is ignited, and thus the air bag is inflated to contact / friction with the tire of the main brake. 4) and the vehicle will be braked.

The friction pad 10 is attached to the bottom of the airbag 8 in contact with the ground in consideration of a puncture caused by friction.

In addition, the airbag 8 is installed in the front and rear axles 9, as can be seen through the drawings, in order to prevent the somyeon phenomenon of the vehicle body during braking, it is preferable to be installed in four places close to the wheel (4) Do. However, the installation position of the air bag 8 may be installed only in two places close to the left and right of the front or rear wheels. In addition, the installation position of the said air bag 8 need not be limited only to an axle, and may be provided in the arbitrary position of the bottom face of a vehicle body.

Based on the above configuration, the operation of the auxiliary brake device according to the present embodiment will be described.

When an obstacle, that is, a preceding vehicle or a pedestrian appears in front of the vehicle and the main brake is suddenly braked by the driver, the brake pedal switch 5 is turned on. At this time, the ECU analyzes the information measured from the distance sensor 6 and the wheel rotational speed sensor 7, and the tire 4 is stopped by the main brake. When the tire 4 and the ground slip, Determine whether the braking distance is the distance that can be collided with the obstacle.

Subsequently, if it is determined that the vehicle is in a collision state, the ECU sends an electrical signal to the air bag 8 to ignite the electric primer and inflate the air bag 8 to establish a ground and friction area with the tire 4 and the ground. Enlarged. By this action, the braking distance of the vehicle is shortened and a collision accident is prevented.

Example 2

The auxiliary brake device according to the present embodiment has the same configuration as that of the first embodiment, and will be described with reference to FIGS. 1 and 2. However, the auxiliary brake device of the present embodiment is configured to exclude the linkage with the main brake and automatically operate the vehicle to brake the vehicle even when the driver does not recognize the obstacle ahead.

More specifically, the auxiliary brake device of the present embodiment includes a distance-sensitive sensor 6 for measuring the distance between the vehicle and an obstacle appearing in front of the vehicle, a wheel speed sensor 7 for measuring the rotational speed of the wheel, and Analyzing the signals from the distance-sensitive sensor 6 and the wheel speed sensor 7 to the ECU that anticipates collision with obstacles and to the air bag 8 which is inflated and contacted with the ground by the signal sent from the ECU. It is composed.

The installation position of the said air bag 8 is the same as that of Example 1 mentioned above, and overlapping description is abbreviate | omitted.

Here, the ECU analyzes the information measured from the distance sensitive sensor 6 and the wheel rotation speed sensor 7 to determine whether the speed of the driving vehicle will collide with an obstacle appearing in front of the vehicle, If it is determined, the air bag 8 is operated to brake the vehicle. Accordingly, the driver recognizes the appearance of the obstacle and activates the main brake. It can also be used effectively to brake the vehicle with the parking (hand) brake if the main brake is broken.

[Effects of the Invention]

Through the embodiments described above, it can be seen that the auxiliary brake device for a vehicle according to the present invention substantially solves the problems of the prior art.

That is, the auxiliary brake device of the present invention is operated together with the main braking brake, thereby increasing the ground and friction area with the ground, thereby reducing the braking distance and thereby preventing accidents.

In addition, the present invention is automatically operated when an obstacle appears in front of the vehicle, it will also have the effect of preventing accidents.

On the other hand, the present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary skill in the art to which the invention belongs without departing from the gist of the invention claimed in the claims, various modifications Would be possible.

Claims (10)

When the driver applies the pedal force to the brake pedal, hydraulic pressure is generated by the booster and the master cylinder, and the brake mounted on the front and rear wheels is activated by the generated hydraulic pressure to brake the vehicle. A distance-sensitive sensor for measuring the distance between the brake pedal switch on and off by the vehicle and an obstacle appearing in front of the vehicle, a wheel speed sensor for measuring the rotational speed of the wheel, the distance-sensitive sensor and the wheel rotational speed The electronic control unit which analyzes the signals of the sensor and the brake pedal switch and predicts the collision with the obstacle, and the airbag which is inflated and contacted / frictioned by the signal sent from the electronic control unit. Auxiliary brake. The auxiliary brake apparatus of claim 1, wherein the air bag is installed at the front and rear axles. 3. The auxiliary brake apparatus according to claim 2, wherein the air bag is installed at four positions in proximity to the wheel. The auxiliary brake apparatus of claim 2, wherein the air bag is installed at two positions adjacent to the front or rear wheels. The auxiliary brake apparatus of claim 1, wherein the air bag has a friction pad attached to a portion contacting the ground. Distance sensing sensor for measuring the distance between the vehicle and the obstacle appearing in front of the vehicle, wheel rotation speed sensor for measuring the rotational speed of the wheel, and analyzes the signals of the distance response sensor and the wheel rotation speed sensor to collide with the obstacle An auxiliary brake device for a vehicle, characterized in that it comprises an electronic control unit which is expected to be in contact with, and the airbag is inflated and contacted with the ground by the channel sent from the electronic control unit. 7. The auxiliary brake apparatus of claim 6, wherein the air bag is installed at the front and rear axles. 8. The auxiliary brake apparatus of claim 7, wherein the airbags are installed at four locations in close proximity to the wheels. 8. The auxiliary brake apparatus of claim 7, wherein the airbags are installed at two positions adjacent to the front or rear wheels. 7. The auxiliary brake apparatus of claim 6, wherein the air bag has a friction pad attached to a portion in contact with the ground.