JPH1128904A - Braking auxiliary device for preventing vehicle from slipping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braking auxiliary device for preventing a vehicle from slipping which is low in manufacturing cost and maintenance cost, and which effectively contributes to the braking of a vehicle on a frozen road surface. SOLUTION: A braking auxiliary device 10 for preventing a vehicle from slipping which is mounted to a vehicle equipped with an anti-lock braking device, is provided with a sand tank 44 for accommodating sand, and a sand discharge pipe 48 connected to the discharge port of the sand tank through a first solenoid valve 46, and the sand discharge pipe is extended on both sides up to ahead of wheels and both tips are open. An electronic control unit 22 of the anti-lock braking device, and the first solenoid valve are connected to each other through a first electric circuit 54, and when the wheels are in locked state, the electronic control unit generates a valve opening signal to the first solenoid valve through the first electric circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to an anti-slip vehicle braking assist device, and more particularly to an AB brake assist device.
The present invention relates to a vehicle brake assist device for preventing slippage, which is suitable for mounting on a vehicle equipped with S.

[0002]

In snowy and cold regions, road surfaces freeze in the winter season, and traffic accidents due to slippage continue. In the past, spiked tires were used in snowy and cold regions in the winter, but as so-called car dust pollution became a social issue, the use of spiked tires was regulated, and the risk of traffic accidents due to slippage was increased. Is growing even more.

Under such circumstances, various measures as described below have been taken in order to prevent the vehicle from slipping on a frozen road surface and to ensure safe driving. First, a snow melting agent, sand, or the like is sprayed on a road surface to prevent the road surface from freezing in winter. However, spraying a snow-melting agent or the like requires considerable expense, and it is substantially impossible to spray the snow-melting agent or the like on all frozen road surfaces.

[0004] Thorough removal of snow on roads has been attempted so that frozen road surfaces cannot be formed. However, it is extremely difficult to completely remove all snow on roads, and it is virtually impossible to completely eliminate snowmelt that melts due to warm air during the day and freezes on the road surface at night.

Attempts have been made to improve the pattern, material and the like of studless tires in order to improve the braking capacity of vehicles, but at present no effective studless tires have been found on frozen road surfaces.

Further, vehicles equipped with an anti-lock brake device (ABS) for preventing wheel lock to maintain steering ability and stabilize the body posture have been increasing.
BS is not very effective for braking on frozen roads.

As described above, at present, no satisfactory solution has been proposed as a method for preventing a vehicle from slipping on a frozen road surface. Accordingly, an object of the present invention is to provide an anti-slip vehicle brake assist device that is inexpensive in both manufacturing cost and maintenance cost and effectively contributes to braking of a vehicle on a frozen road surface.

[0008]

According to a first aspect of the present invention, there is provided an anti-slip vehicle brake assisting device which is mounted on a vehicle equipped with an anti-lock brake device, comprising: a sand tank for storing sand; A sand discharge pipe connected to the discharge port via a first electromagnetic valve, the sand discharge pipe extending to the front of the wheel, the tip being open, and an electronic control unit of the antilock brake device and the first The electromagnetic valve is connected by a first electric circuit, and when the wheels are locked, a valve opening signal is sent from the electronic control unit to the first electromagnetic valve via the first electric circuit. It is characterized by having.

According to a second aspect of the present invention, there is provided an anti-slip vehicle braking device according to the first aspect, wherein an air pipe having one end connected to a sand discharge pipe and the other end connected to an air compressor; A second electromagnetic valve disposed in the middle of the pipe, wherein the electronic control unit and the second electromagnetic valve are connected by a second electric circuit; A valve opening signal is sent to the second electromagnetic valve via the electric circuit of (1).

According to a third aspect of the present invention, there is provided the vehicle brake assisting device for preventing slippage, wherein the first electric circuit is closed when the first and second electromagnetic valves are closed. A delay means for transmitting a valve closing signal of the second electromagnetic valve slightly behind the valve closing signal of the electromagnetic valve is provided.

According to a fourth aspect of the present invention, there is provided a vehicle brake assisting apparatus for preventing slippage, comprising: a sand tank for storing sand; and a sand discharge pipe connected to a discharge port of the sand tank via a first electromagnetic valve. The discharge pipe extends to the front of the wheel, the tip is open, and an opening / closing means for opening / closing the first electromagnetic valve is provided.

According to a fifth aspect of the present invention, there is provided an anti-slip vehicle braking device according to the fourth aspect, wherein an air pipe having one end connected to a sand discharge pipe and the other end connected to an air compressor; A second electromagnetic valve is provided in the middle of the pipe, and an opening / closing means for opening and closing the second electromagnetic valve is provided.

[0013]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing the configuration of a vehicle brake assist device for slip prevention according to the present invention using ABS. In FIG. 1, a vehicle brake assist device for slip prevention according to the present invention has a reference numeral 1 as a whole.
It is indicated by 0. The ABS shown in FIG. 1 includes each wheel (ie, right front wheel 12, left front wheel 14, right rear wheel 1).
6, a wheel speed sensor 20, an electronic control unit (ECU) 22, and a hydraulic unit 24 disposed adjacent to the right rear wheel 18).

The wheel speed sensor 20 generates an AC signal having a frequency proportional to the rotation speed of the wheel by detecting the teeth of a gear rotating together with the wheel or the drive shaft. be called.

Normally, the ECU 22 receives an AC signal transmitted from the wheel speed sensor 20, calculates a wheel speed, and calculates a slip rate signal and a wheel acceleration / deceleration signal based on the wheel speed. The control function that generates a control command for the brake pressure and transmits it to the hydraulic unit 24, and checks and monitors the function of each component and the entire system. If a defect occurs, the lamp or buzzer informs the driver. After a warning, the system has a monitor function for stopping the function of the system and enabling normal braking.

The hydraulic unit 24 includes a master cylinder 26
Between the wheel cylinder 28 and the ECU 22
The brake pressure is directly or indirectly increased or decreased by driving a solenoid valve, a pump, or a motor in response to a control command from the controller, and is also called an actuator.

The wheel speed sensors 20 and the ECU 22 are connected by electric circuits 30, 32, 34 and 36, respectively. The ECU 22 and the hydraulic unit 24 are connected by an electric circuit 38. Also, master cylinder 2
6 and the hydraulic unit 24 are connected by a hydraulic line 40, and the hydraulic unit 24 and each wheel cylinder 28
Are connected by a hydraulic line 42, respectively.

The ABS described above may be of the prior art.
The ABS shown in FIG. 1 is of a so-called 4-sensor 4-channel system, but other types of ABS are used.
(For example, a 3-sensor 3-channel system, a 4-sensor 2
Channel system).

The anti-slip vehicle braking assist device 10 of the present invention includes a sand tank 44 for storing sand. A discharge port 44a is provided at the lower end of the sand tank 44,
A sand discharge pipe 48 is connected to the discharge port 44a via an electromagnetic valve 46. As shown in FIG. 1, the sand discharge pipe 48 extends to the front of the right front wheel 12 and the left front wheel 14, and the tips 48a and 48b of the sand discharge pipe 48 are opened so that sand can be discharged. doing.

One end of an air pipe 50 is connected to the sand discharge pipe 48, and the other end of the air pipe 50 is connected to an air compressor (not shown) mounted on a vehicle. In the middle of the air pipe 50, an electromagnetic valve 52 is arranged. Further, the electromagnetic valve 46 and the ECU 22 are connected by an electric circuit 54, and the electromagnetic valve 52 and the ECU 22 are connected.
Are connected by an electric circuit 56.

Preferably, the electric circuit 56 is provided with delay means 58 for transmitting the valve closing signal of the electromagnetic valve 52 slightly later than the valve closing signal of the electromagnetic valve 46 when the electromagnetic valves 46 and 52 are closed. ing. This prevents the sand from remaining in the sand discharge pipe 48.

Incidentally, the air compressor of the air suspension system may be used as the air compressor.
Alternatively, the vehicle brake assist device 10 for slip prevention of the present invention
May be used.

The sand used in the vehicle brake assisting device 10 for preventing slip of the present invention is preferably obtained by drying washing sand having a particle size of about 1 mm.

The operation of the vehicle brake assisting device 10 for slip prevention according to the present invention having the above-described structure will be described. When the ECU 22 determines that the wheels are in a locked state based on a signal transmitted from the wheel speed sensor 20, the ECU 22
22 sends a control signal to the hydraulic unit 24, and controls the electromagnetic valves 46, 5 via electric circuits 54, 56.
2 to send a valve open signal. The electromagnetic valve 46 is opened by the signal sent to the electromagnetic valve 46 and the sand tank 4
Sand is discharged from 4. On the other hand, the signal sent to the electromagnetic valve 52 causes the electromagnetic valve 52 to open. Thereby, the compressed air supplied from the air compressor is sent to the sand discharge pipe 48 via the air pipe 50, and the sand discharge pipe 48
Right front wheel 12, left front wheel 14 from the tips 48a, 48b of
Sand is sprayed on the road surface in front of the vehicle, on the right front wheel 12, the left front wheel 14 itself, or on both of them.

The present invention is not limited to the above embodiments of the invention, and various changes can be made within the scope of the invention described in the claims. It goes without saying that it is included within.
For example, in the above embodiment, the left and right front wheels 12, 14
The sand is injected only to the front road surface and / or the left and right front wheels 12 and 14 itself, but the front road surface of the left and right rear wheels 16 and 18 and / or the left and right rear wheels 16 and 1
8 may be configured so that sand is also sprayed on itself.

In the above embodiment, the vehicle brake assisting device 10 for slip prevention is configured to operate in conjunction with the ABS. However, in a vehicle not equipped with the ABS, the vehicle braking assisting device for slip prevention is provided. Only the device 10 may be mounted on a vehicle, for example, by operating a valve opening / closing means provided in a driver's seat to manually open an electromagnetic valve, thereby injecting sand. This is effective, for example, in a case where when the wheels are stuck in snow and the vehicle cannot move, sand is dropped on the road surface in front of the drive wheels to try to escape the vehicle.

In the above embodiment, the sand is injected by the compressed air. However, the sand is naturally dropped on the road surface in front of the wheel without using the compressed air. Is also good.

[0028]

According to the present invention, the frictional force between the wheels and the road surface is increased by the dry sand sprayed on the frozen road surface and / or the wheels, and the stopping distance of the vehicle can be shortened. In the case of using ABS, the sand is sprayed only at the place where the wheel is locked (that is, the place where the wheel slips easily), and is not sprayed at the unnecessary place. Since the sand is scattered at places where the vehicle easily slips, it also contributes to the prevention of slippage of vehicles not equipped with the device of the present invention. In addition, the present invention also serves as an automatic detection apparatus for a frozen road to find a place where slippage is likely to occur. Cleaning the sprayed sand is enough, and the road management work becomes more efficient. Further, since the sand used in the present invention is usually about 4 to 5 yen per liter, the maintenance cost is low. Further, since the existing ABS and air suspension device can be used, the manufacturing cost is relatively low. Further, the present invention is effective not only on a frozen road surface but also on a road surface wet with rain.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a vehicle brake assist device for slip prevention according to the present invention using an ABS.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Slip prevention vehicle brake assist device 12, 14, 16, 18 Wheel 20 Wheel speed sensor 22 Electronic control unit (ECU) 24 Hydraulic pressure unit 44 Sand tank 46, 52 Electromagnetic valve 48 Sand discharge pipe 50 Air pipe 54, 56 Electricity Circuit 58 Delay means

Claims (5)

[Claims] An anti-slip vehicle braking device mounted on a vehicle equipped with an anti-lock brake device, wherein the auxiliary device is connected to a sand tank containing sand via a first electromagnetic valve to a discharge port of the sand tank. A sand discharge pipe extending to the front of the wheel, the tip being open, and an electronic control unit of the antilock brake device and a first electromagnetic valve connected by a first electric circuit. And a valve opening signal is sent from the electronic control unit to the first electromagnetic valve via the first electric circuit when the wheel is locked. 2. An electronic control unit, comprising: an air pipe connected at one end to a sand discharge pipe, and the other end connected to an air compressor; and a second electromagnetic valve disposed in the middle of the air pipe. Are connected by a second electric circuit, and when the wheels are locked, a valve opening signal is sent from the electronic control unit to the second electromagnetic valve via the second electric circuit. The device of claim 1, wherein the device is: 3. The second electric circuit includes a valve closing signal for the second electromagnetic valve that is slightly delayed from the valve closing signal for the first electromagnetic valve when the first and second electromagnetic valves are closed. 3. The device according to claim 2, further comprising a delay means for transmitting the signal. 4. An auxiliary vehicle braking device for slip prevention, comprising: a sand tank for storing sand; and a sand discharge pipe connected to a discharge port of the sand tank via a first electromagnetic valve. Apparatus characterized in that the tube extends to the front of the wheel, the tip is open and comprises opening and closing means for opening and closing the first solenoid valve. 5. An air pipe having one end connected to the sand discharge pipe and the other end connected to the air compressor, a second solenoid valve arranged in the middle of the air pipe, and opening and closing the second solenoid valve. An opening / closing means is provided.
An apparatus according to claim 1.