JPH0948204A - Hydroplanting preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydroplaning preventing device previously preventing a hydroplaning phenomenon from generating. SOLUTION: This hydroplaning preventing device is provided with traveling wind introducing ducts 4, 5, for introducing traveling wind generated by a traveling vehicle and injection nozzles 6 branched from the traveling wind introducing ducts 4, 5 and injecting the traveling wind in front of respective tires 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a hydroplaning prevention device for preventing a hydroplaning phenomenon caused by a water film formed between a tire and a road surface during high speed running in rainy weather.

[0002]

2. Description of the Related Art During high-speed running in rainy weather, a water film is present between a tire and a road surface due to rainwater accumulated on the road surface, which causes a hydroplaning phenomenon which impairs steering stability and braking performance.

As a conventional device considering such a hydroplaning phenomenon, for example, Japanese Patent Laid-Open No. 5-1050 is known.
The one described in Japanese Patent No. 57 is known.

In this prior art publication, a difference between a driven wheel speed filter value and a driven wheel speed sensor value is calculated, and when the difference is equal to or more than a predetermined value, it is detected as a hydroplaning phenomenon and based on the detection result. A technique for performing throttle control and brake control is disclosed.

[0005]

However, in such a conventional technique, the occurrence of the hydroplaning phenomenon is allowed, and after that, the throttle control and the brake control are replaced with the normal control as a countermeasure against the hydroplaning. It corrects the vehicle in a stable direction, and does not prevent the occurrence of the hydroplaning phenomenon itself.

The problems to be solved by the present invention are listed below.

The first problem is to prevent the occurrence of the hydroplaning phenomenon in advance in a device that does not load the engine.

The problem 2 is to prevent the occurrence of the hydroplaning phenomenon in advance in a device which can utilize an air source for a vehicle.

The problem 3 is to achieve the first or the second problem while suppressing the rise of dust and the like from the road surface during normal traveling.

Problem 4 is to achieve the first to third problems by removing the rainwater on the road surface in front of the tire.

Problem 5 is to achieve the first to third problems by removing rainwater adhering to the tire.

[0012]

[Means for Solving the Problems]

(Solution 1) Solution 1 for the above-mentioned problem 1 (claim 1)
Is provided with a traveling wind introduction duct for introducing traveling wind generated by traveling of the vehicle, and an injection nozzle branched from the traveling wind introduction duct for injecting traveling wind in front of each tire. .

The operation will be described.

During high-speed traveling, traveling wind generated according to the traveling speed of the vehicle is introduced from the traveling wind introduction duct, and the traveling wind having a higher flow velocity is injected in front of each tire by the injection nozzle branched from the traveling wind introduction duct. To be done.

Therefore, when running at high speed in rainy weather, rainwater in front of each tire is scattered and removed by the traveling wind from the injection nozzle, and a water film is not formed between the tire and the road surface, and this water film is generated. Hydroplaning phenomenon is prevented.

Due to this action, the water film is more likely to be formed and the possibility of hydroplaning phenomenon is increased as the vehicle is traveling at a higher speed, while the traveling wind generated by traveling of the vehicle is used. As the vehicle travels at higher speeds, the flow velocity of the traveling wind injected from the injection nozzles increases, and the rainwater removing action in front of the tire increases.

(Solution 2) Solution 2 of the above problem 2
(Claim 2) comprises an air tank for storing high-pressure air produced by driving the compressor, and an injection nozzle branched from the air tank to inject high-speed air in front of each tire. To do.

The operation will be described.

High-pressure air produced by driving the compressor is stored in the air tank, and high-speed air is injected in front of each tire by an injection nozzle branched from the air tank.

Therefore, during high-speed running in rainy weather, the rainwater in front of each tire is scattered and removed by the high-speed air from the injection nozzle, and a water film is not formed between the tire and the road surface, which is caused by this water film. Hydroplaning phenomenon is prevented.

(Solution 3) Solution 3 of the above problem 3
(Claim 3) is the hydroplaning prevention device according to Claim 1 or Claim 2, which is normally switched to a side that prohibits the injection of running wind or air in front of each tire, and in a rainy high speed. When conditions that may cause hydroplaning such as running are detected,
Alternatively, when it is determined that the hydroplaning phenomenon may occur, switching means is provided for switching to a side that injects traveling wind or air to the front of each tire.

The operation will be described. The running wind or air is jetted from the injection nozzle only under the condition that the hydroplaning phenomenon may occur such as high-speed running in rainy weather. Alternatively, since the injection of air is prohibited, dust and the like from the road surface can be suppressed when traveling on a dry road.

(Solution 4) Solution 4 of Problem 4
(Claim 4) is the hydroplaning prevention device according to any one of claims 1 to 3, wherein the injection direction of the injection nozzle is directed to the road surface in front of each tire.

The operation will be described. Running wind or air is sprayed on the road surface in front of each tire, and water on the road surface and water accumulated in the ruts are removed.

(Solution 5) Solution 5 of the above problem 5
(Claim 5) is the hydroplaning prevention device according to any one of claims 1 to 3, wherein the injection direction of the injection nozzle is directed toward the surface of each tire.

The operation will be described. Traveling wind or air is sprayed on the surface of each tire, and water adhering to the tire groove or the like in a rotating state is removed.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) Embodiment 1 is a hydroplaning prevention device corresponding to solving means 1, solving means 3 and solving means 4.

First, the configuration will be described.

FIG. 1 is an overall system diagram showing a hydroplaning prevention device, and FIG. 2 is a block diagram showing a valve control system of the hydroplaning prevention device.

In FIG. 1, 1 is an engine, 2 is a bonnet, 3 is a windshield, 4 is a first traveling air introducing duct, 5 is a second traveling air introducing duct, 6 is an injection nozzle, and 7 is a switching valve (switching means). ), 8 is a tire, 9 is a road surface, and 10 is rainwater.

The first traveling wind introduction duct 4 is a duct that takes in traveling wind from below the engine 1 from the front of the vehicle.

The second traveling wind introduction duct 5 is a duct for taking in traveling wind from the position where the rear end of the bonnet 2 and the lower end of the windshield 3 pass through the rear portion of the engine 1.

The injection nozzle 6 is a nozzle which is arranged so as to branch to each of the four tires 8 from the position where the two traveling wind introducing ducts 4 and 5 are gathered, and injects the traveling wind in front of the tire 8. The injection direction of the injection nozzle 6 is directed to the road surface 9 in front of the tire 8.

The switching valve 7 is arranged inside each of the injection nozzles 6 or in a duct collecting portion immediately before branching to each tire 8 and is controlled to be opened / closed by a valve control system described later.

In FIG. 2, 7 is a switching valve, and 11
Is a valve actuator, 12 is a raindrop sensor, 13 is a vehicle speed sensor, and 14 is a valve opening / closing control circuit.

The valve actuator 11 is an actuator that drives the switching valve 7 to open and close, and a motor, a solenoid or the like is used.

The raindrop sensor 12 is a sensor that detects raindrops when it is raining and outputs an electric signal indicating when raindrops are detected.
This is a sensor used in an automatic wiper device or the like.

The vehicle speed sensor 13 is a sensor that detects the vehicle speed and outputs an electric signal corresponding to the vehicle speed.

The valve opening / closing control circuit 14 receives the detection signals from the raindrop sensor 12 and the vehicle speed sensor 13, and the conditions under which the hydroplaning phenomenon may occur are when the raindrop is detected and the vehicle speed is Sets a condition that the vehicle speed is higher than the set vehicle speed, and when this condition is satisfied, a drive command for opening the switching valve 7 is output to the valve actuator 11, and when this condition is not satisfied, the valve actuator 11 Is a circuit that outputs a drive command to close the switching valve 7.

Next, the operation will be described.

[During high-speed rainy weather] During high-speed rainy weather, when the raindrop sensor 12 detects raindrops and the vehicle speed detected by the vehicle speed sensor 13 satisfies the condition that the vehicle speed is higher than the set vehicle speed. , Valve opening / closing control circuit 1
4 outputs a drive command to the valve actuator 11 to open the switching valve 7,
Is opened.

Therefore, the traveling wind generated according to the traveling speed of the vehicle is introduced from both traveling wind introducing ducts 4 and 5, and each tire 8 is provided by the injection nozzle 6 branched from the assembly portion of both traveling air introducing ducts 4 and 5. The running wind with the increased flow velocity is jetted to the road surface 9 in front of.

Therefore, during high-speed running in rainy weather, rainwater on the road surface in front of each tire 8 and water accumulated on the ruts 9a of the road surface 9 are removed by the running wind from the injection nozzles 6 as shown in FIG. No water film is formed between the road surface 9 and the road surface 9, the hydroplaning phenomenon caused by the water film formation is prevented, and running stability is ensured during high speed running in rainy weather.

Here, the advantage of removing rainwater in front of the tire 8 by using traveling wind will be described.

First, since the running wind that does not use the engine driving force is used, it does not become a load on the engine 1. As a result, while preventing the hydroplaning phenomenon, the fuel consumption is not deteriorated and the driving force is not reduced.

Secondly, the higher the running speed, the more easily a water film is formed, and the possibility of hydroplaning phenomenon increases. On the other hand, by using the traveling wind generated by the traveling of the vehicle, the flow velocity of the traveling wind injected from the injection nozzle 6 increases as the traveling speed increases.
Therefore, the higher the possibility of occurrence of the hydroplaning phenomenon, the greater the effect of removing rainwater in front of the tire 8, and the occurrence of the hydroplaning phenomenon can be reliably prevented.

[Except High Speed Rain Running] When the vehicle is not running in high speed rain, the valve opening / closing control circuit 14 is switched to the valve actuator 11 by satisfying at least one of the raindrop condition and the high speed running condition. A drive command for closing the valve 7 is output, and the switching valve 7 is kept closed.

Therefore, during normal running other than high speed rain running, jetting of running wind is prohibited from the jet nozzle 6.
It is possible to prevent dust and the like from flying up from the road surface when traveling on a dry road.

Next, the effect will be described.

(1) Both traveling wind introduction ducts 4 and 5 for introducing traveling wind generated by traveling of the vehicle, and branched from both traveling wind introduction ducts 4 and 5 to inject traveling wind in front of each tire 8. Since the configuration is provided with the injection nozzle 6, it is possible to prevent the occurrence of the hydroplaning phenomenon in advance in a device that does not apply a load to the engine 1.

(2) The injection valve 6 is provided with the switching valve 7, and when the raindrop is detected and the vehicle speed is not higher than the set vehicle speed, that is, when the vehicle is running normally, the injection nozzle 6 outputs Since the configuration is such that the injection of the traveling wind is prohibited, it is possible to prevent dust and the like from rising from the road surface during normal traveling.

(3) Since the injection direction of the injection nozzle 6 is directed toward the road surface 9 in front of the tire 8, the removal of rainwater on the road surface in front of the tire 8 can prevent the occurrence of the hydroplaning phenomenon in advance. .

(Embodiment 2) Embodiment 2 is a hydroplaning prevention device corresponding to solving means 2, solving means 3 and solving means 5.

First, the structure will be described.

FIG. 4 is an overall system diagram showing a hydroplaning prevention device.

In FIG. 4, 20 is a battery, 21 is a compressor, 22 is an air tank, 23 is an injection nozzle, 2
4 is a pressure sensor, 25 is a compressor switch, and 26 is a one-way valve.

The compressor 21 includes an air tank 22.
Is monitored by the pressure sensor 24, and when the pressure in the air tank 22 becomes equal to or lower than the set pressure, the air tank 22 is driven.

The air tank 22 is a compressor 21.
It is a tank that stores high-pressure air created by the drive of the.

The injection nozzle 23 is a nozzle that is disposed so as to branch from the air tank 22 to each of the four tires 8 and injects traveling wind in front of the tire 8. The injection direction of the injection nozzle 23 is directed to the surface of the tire 8.

Since the switching valve 7 and the valve opening / closing control system are the same as those in the first embodiment, the corresponding components are designated by the same reference numerals and the description thereof will be omitted.

Next, the operation will be described.

[During high-speed rainy weather] During high-speed rainy weather, when the raindrop sensor 12 detects raindrops and the vehicle speed detected by the vehicle speed sensor 13 satisfies the condition that the vehicle speed is higher than the set vehicle speed. , Valve opening / closing control circuit 1
4 outputs a drive command to the valve actuator 11 to open the switching valve 7,
Is opened.

Therefore, the high pressure air stored in the air tank 22 is opened at the same time as the switching valve 7 is opened.
3, the jet nozzle 23 injects high-speed air with an increased flow velocity onto the surface of each tire 8.

Therefore, during high speed running in rainy weather, the injection nozzle 23
Rainwater adhering to the tread groove of each tire 8 in a rotating state is removed by high-speed air from the tires, and a water film is not formed between the tire 8 and the road surface 9. Planing phenomenon is prevented and running stability is ensured during high speed running in rainy weather.

Here, the advantage of removing the rainwater in front of the tire 8 by utilizing the high pressure air stored in the air tank 22 will be described.

First, when a control system using an air cylinder or the like as an actuator is mounted on a vehicle, a compressor 21 and an air tank 22 are mounted as an air source of the air cylinder. In this case, this air source can be shared.

Secondly, when high-speed air is being jetted from the jet nozzle 23, the pressure in the air tank 22 is lowered, so that the compressor 21 is constantly driven, and the engine brake is applied by the engine load due to the compressor driving. However, the braking performance improves in the rain.

The operation other than the high-speed rainy weather operation is the same as that of the first embodiment, and therefore its explanation is omitted.

Next, the effect will be described.

(1) A structure provided with an air tank 22 for storing high-pressure air produced by driving the compressor 21, and an injection nozzle 23 branched from the air tank 22 for injecting high-speed air in front of each tire 8. Therefore, it is possible to prevent the occurrence of the hydroplaning phenomenon in advance in a device that can use an on-vehicle air source.

(2) Switching valve 7 to the injection nozzle 23
When a raindrop is detected and the vehicle speed is normal when the vehicle speed does not satisfy the condition that the vehicle speed is higher than the set vehicle speed,
Since the jet of the traveling wind from the jet nozzle 6 is prohibited, it is possible to prevent dust and the like from rising from the road surface during normal traveling.

(3) Since the injection direction of the injection nozzle 6 is directed toward the surface of the tire 8, the rainwater adhering to the tire 8 can be removed to prevent the hydroplaning phenomenon from occurring in advance.

(Other Embodiments) Embodiments 1 and 2
In the above, the means for automatically performing the switching by using the sensors 12 and 13 and the valve opening / closing control circuit 14 is shown. However, a switch manually switched by the driver is arranged near the driver's seat to allow the driver to judge while traveling. Based on this, a means for opening and closing the valve by manual switch operation may be used.

In the first and second embodiments, the raindrop condition and the vehicle speed condition are used as the conditions for judging the possibility of the hydroplaning phenomenon, but the judgment is made by adding other conditions such as the road surface condition. You may do it.

The first embodiment shows an example in which the injection direction of the injection nozzle is the road surface in front of each tire.
In the above, an example in which the injection direction of the injection nozzle is the surface of each tire is shown, but the injection direction of the injection nozzle may be an intermediate direction that includes both the tire front road surface and the tire surface, and the injection nozzle injection It may be an example in which the directions are two and directed toward both the road surface ahead of the tire and the tire surface.

Although the compressor 21 is driven by the battery 20 in the second embodiment, the compressor may be directly driven by the engine.

[0077]

In the hydroplaning prevention device according to the first aspect of the present invention, the traveling wind introducing duct for introducing the traveling wind generated by traveling of the vehicle and the traveling wind introducing duct branched from the traveling wind introducing duct are provided in front of each tire. Since the device is provided with the injection nozzle for injecting, the effect of being able to prevent the occurrence of the hydroplaning phenomenon in advance in a device that does not apply a load to the engine is obtained.

In the hydroplaning prevention device according to claim 2, an air tank for storing high-pressure air produced by driving the compressor, and an injection nozzle for branching from the air tank to inject high-speed air in front of each tire. Since the device is provided with, the effect that the occurrence of the hydroplaning phenomenon can be prevented in advance is obtained in the device that can use the vehicle-mounted air source.

In the hydroplaning prevention device according to claim 3, in the hydroplaning prevention device according to claim 1 or 2, it is normally prohibited to inject running wind or air in front of each tire. It has been switched to the side where it is turned on, and when a condition that may cause hydroplaning phenomenon such as high speed running in the rain is detected,
Alternatively, when it is determined that a hydroplaning phenomenon may occur, switching means is provided to switch to the side that injects the running wind or air to the front of each tire, so dust etc. from the road surface during normal running The above effect can be achieved while suppressing.

In the hydroplaning prevention device according to claim 4, in the hydroplaning prevention device according to any one of claims 1 to 3, the injection direction of the injection nozzle is directed toward the road surface in front of each tire. By removing the rainwater on the road surface in front, it is possible to prevent the occurrence of the hydroplaning phenomenon.

In the hydroplaning prevention device according to the fifth aspect, in the hydroplaning prevention device according to any one of the first to third aspects, since the injection direction of the injection nozzle is directed to the surface of each tire, it adheres to the tire. By removing the rainwater, the effect of being able to prevent the occurrence of the hydroplaning phenomenon is obtained.

[Brief description of drawings]

FIG. 1 is an overall system diagram showing a hydroplaning prevention device according to a first embodiment.

FIG. 2 is a block diagram showing a valve opening / closing control system in the hydroplaning prevention device according to the first embodiment.

FIG. 3 is an explanatory view of the action of removing rainwater by the hydroplaning prevention device according to the first embodiment.

FIG. 4 is an overall system diagram showing a hydroplaning prevention device according to a second embodiment.

[Explanation of symbols]

 1 engine 2 bonnet 3 windshield 4 first traveling wind introduction duct 5 second traveling wind introduction duct 6 injection nozzle 7 switching valve (switching means) 8 tire 9 road surface 10 rainwater

Claims (5)

[Claims] 1. A traveling wind introduction duct for introducing traveling wind generated by traveling of a vehicle, and an injection nozzle branched from the traveling wind introduction duct for injecting traveling wind in front of each tire. Characterizing hydroplaning prevention device. 2. A hydro tank, comprising: an air tank for storing high-pressure air produced by driving a compressor; and an injection nozzle branched from the air tank for injecting high-speed air in front of each tire. Planing prevention device. 3. The hydroplaning prevention device according to claim 1 or 2, wherein the jet is usually switched to a side that prohibits injection of running wind or air in front of each tire, and high speed running in rainy weather or the like. When a condition in which the hydroplaning phenomenon may occur is detected, or when it is determined that the hydroplaning phenomenon may occur, a switching means for switching the side in which the running wind or air is injected in front of each tire. A hydroplaning prevention device characterized by being provided with. 4. The hydroplaning prevention device according to claim 1, wherein the injection direction of the injection nozzle is directed to the road surface in front of each tire. 5. The hydroplaning prevention device according to any one of claims 1 to 3, wherein the injection direction of the injection nozzle is directed toward the surface of each tire.