JPH0659826B2 - Control method of railway vehicle on relaxation curve - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the height of an air spring so that a railway vehicle having a bogie truck with an air spring does not cause stopper hits on a relaxation curve.

2. Description of the Related Art A railway vehicle having a bogie bogie with an air spring often adopts a four-point support system in which four air springs are arranged in one vehicle, and each air spring is configured to automatically adjust its height. ing. That is, the automatic height adjusting mechanism is provided in which the link and the leveling valve are combined to automatically adjust the compressed air amount of the air spring according to the load at each time to keep the height of the vehicle body constant.

Further, a differential pressure adjusting valve is mounted between the left and right auxiliary air chambers in order to keep the left and right air spring air pressures even when the left and right air spring air pressures greatly differ.

When the railway vehicle is on a flat line and the front and rear bogies are in the same plane, the air pressure of each air spring is automatically adjusted by the function of the automatic height adjustment mechanism, and the height of the vehicle body is kept constant. Then, while the height is kept constant, supply / exhaust of the leveling valve of the automatic height adjusting mechanism is stopped.

However, as shown in FIG. 5, when the railroad vehicle enters the relaxation curve of the curved road, that is, the gradually decreasing section,
The height of the four air springs (13) (14) (16) (17) of (1) is geometrically determined by the relationship between the bogie and the vehicle body, so the front bogie (11) of the front bogie (11) is The outer rail side (13) of the air spring is compressed and the inner rail side (14) is expanded.

In the air spring of the rear bogie (12), the inner track side (16) compresses and the outer track side (17) expands. Further, since the height of each air spring deviates from the control target value, the supply and exhaust of the leveling valve of the automatic height adjusting mechanism are continuously performed.

As described above, when the railway vehicle having the air spring truck is in the cant diminishing section, the air spring is continuously supplied and exhausted. Therefore, the load on the air compressor increases, and in some cases, the supply of compressed air may not catch up, the pressure on the high-pressure air supply side may drop, and air may not be supplied.
Further, due to the continuous supply and exhaust of air, vibration and noise of the vehicle body are generated, which deteriorates passenger comfort.

The present inventor eliminates the above-mentioned drawbacks of the conventional air spring carriage that individually adjusts the height of the air spring, and does not supply or exhaust the air spring while the railway vehicle is stopped in the cant diminishing section. A method for controlling the air spring of a railway vehicle is proposed.

According to the above control method, continuous air supply / exhaust in the cant gradually decreasing section can be prevented. However, the entire vehicle body may be inclined to one side. When the inclination is large, the vehicle body may come into contact with the compression side stopper or the extension side stopper attached to the air spring.

In this way, if the stopper of the vehicle body hits, not only the riding comfort is deteriorated but also noise is generated, which is not preferable.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention detects the cant graduation on a relaxation curve from the difference in relative rolling angle between the vehicle body of the front and rear bogie air springs and the bogie to determine the average height of the left and right air springs. As a control method, a control method of a railway vehicle on a relaxation curve that eliminates the stopper contact of the vehicle body is proposed.

Means for Solving the Problems In order to achieve the above object, the control method of the present invention is a method of controlling supply / exhaust control by measuring individual air spring heights of a railway vehicle having a bogie bogie with an air spring. The relative rolling angle θ between the car body and the bogie in each of the front and rear bogies is shown by the following equations 1 and 2 below.
_A and θ _B are detected by whether they have opposite signs. When they are not opposite signs, normal individual height control is performed, and when they are opposite signs, the average relative rolling angle between the relative rolling angles θ _A and θ _B || The average relative rolling angle is controlled by comparing the relative rolling angle difference tolerance Δθ _r with the left and right air spring height control for each carriage when the average relative rolling angle ││ is equal to or smaller than the tolerance Δθ _r. Is the tolerance Δθ
When it is larger than _r , the relative rolling angles θ _A and θ _B are further increased.
It is characterized in that the positive and negative signs of the total rolling angle Θ are detected, and the relative rolling angles of the front and rear bogies are controlled to have the same magnitude and opposite signs.

The above "relative rolling angle" means the inclination of the front and rear bogies in the width direction of the vehicle body with respect to the bogie, and assuming that the relative rolling angle of the front bogie is θ _A and the relative rolling angle of the rear bogie is θ _B , for example, Indicated by the formula.

However, δ ₁ δ ₂ is the deviation of the height of the left and right air springs of the front bogie from the target value. Δ ₃ δ ₄ is the deviation of the height of the left and right air springs of the rear bogie from the target value. B is the distance between the center of the left and right air springs. Air supply / exhaust is performed by automatically operating the air supply valve and the exhaust valve by a height sensor that detects the height of the air spring and a controller.

Therefore, on a flat line, the height of each air spring can be adjusted to the target height even if it is independently controlled. The air supply / exhaust is stopped while the air spring maintains the target height.

When the railway vehicle is in the cant diminishing section, it is detected whether the relative rolling angles θ _A and θ _B between the vehicle body and the bogie have the opposite signs, and when they are not the opposite signs, normal individual height control is performed,
When the signs are opposite, the average relative rolling angle || between the relative rolling angles θ _A and θ _B is continuously compared with the tolerance Δθ _r of the difference between the relative rolling angles, and the average relative rolling angle ||
Or but equal to the tolerance [Delta] [theta] _r, also small when performs a left-right air spring height control for each bogie, when the average relative rolling angle || is greater than the tolerance [Delta] [theta] _r further relative rolling angle theta _A and theta _B The positive and negative signs of the total rolling angle Θ are detected and the relative rolling angles of the front and rear bogies are controlled to have the same magnitude and opposite signs, so that the stopper hit of the vehicle body does not occur.

Embodiment An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 show essential parts when the air spring control device according to the present invention is applied to a bolsterless carriage. The air springs (3) provided on the left and right sides of the bogie frame (2) have an auxiliary air chamber (3-1) connected to the lower part of the bogie frame.
The outer cylinder (3-2) on the upper surface of the air spring is attached to (2) and is in contact with the bottom surface of the vehicle body (1).

Then, the air supply pipe (4) provided through the outer cylinder (3-2) is connected to the original air reservoir (6) via the electromagnetic air supply valve (5). Similarly, the electromagnetic exhaust valve (7) and pressure sensor (8) are penetrated through the outer cylinder (3-2).
To provide. Then, a height sensor (9) including a link and a signal transmitter is installed between the bottom surface of the vehicle body (1) and the side surface of the bogie frame (2).

A controller (10) is installed in the center of the bottom surface of the vehicle body (1) between the front and rear bogies, receives the detection signal from each height sensor (9), and also each electromagnetic air supply valve (5) and each electromagnetic exhaust valve. The valve opening / closing operation signal is transmitted to (7), and the air spring height information is compared and calculated with the target height, and the relative rolling angles θ _A , θ between the vehicle body and the bogie in the air spring portion are further calculated. _The air supply / exhaust control of the air spring is performed by obtaining _B.

The pressure sensor (8) is used when the internal pressure of the air spring is measured and the internal pressure is controlled.

Now, in FIG. 3, the spring heights of the left and right air springs of the front bogie (18) are h ₁ and h ₂ , the spring heights of the left and right air springs of the rear bogie (19) are h ₃ , h ₄ , and the center of the left and right air springs. the distance between b, and the target height of the air spring and h _r ± δ, b and h _r ± [delta] is kept inputted to the controller by setting in advance. It should be noted that δ is a tolerance and is empirically determined, but is set to about 2.5 to 6 mm for a movable range of +80 to −40, for example.

When the railway vehicle is in the gradually decreasing section, the air spring height h calculated by the height sensor (9) opposite each air spring.
Based on the detection signals of ₁ , h ₂ , h ₃ , and h ₄ , the controller (1
At 0), the height deviations δ _{1 to} δ ₄ are calculated as follows.

_{δ 1 = h r -h 1 δ} 3 = h r -h 3 δ 2 = h r -h 2 δ 4 = h r -h 4 also from the deviation of the height, the body of the air spring portion of the first carriage And the relative rolling angle θ _A between the vehicle and the vehicle and the relative rolling angle θ _B between the vehicle body and the vehicle in the air spring portion of the second vehicle are obtained.

Further, the air spring average height deviation δ _A of the first truck and the air spring average height deviation δ _{B of} the second truck are obtained.

The height control of the air spring based on the relative rolling angles θ _A and θ _B in the air spring portion calculated by the controller (10)
This is performed according to the flowchart shown in the figure.

That is, the relative rolling angle θ _A in the air spring portion of the front bogie (18) and the relative rolling angle θ _B in the air spring portion of the rear bogie (19) are compared to detect the track twist. In this case, if θ _A and θ _B have the same sign, there is no orbital twist, and normal individual height control is performed. Also, θ _A and θ
_{If B} has the opposite sign, there is orbital twist, and therefore the average relative rolling angle || is compared with the tolerance Δθ _r of the difference between the relative rolling angles.

here The tolerance Δθ _r is the dead zone δ (usually 5 mm) when the conventional leveling valve is used, which is half the distance between the left and right air springs.
_It may be about a value divided by ₁ (about 0.005 rad).

Here, if the front and rear bogies are evenly twisted, θ _A = −θ _B
Therefore, || = 0. Further, when the value of the unevenness is small, || ≦ Δθ _r , which is within the tolerance.

When || is equal to or smaller than the tolerance Δθ _r , the left and right air spring average height control is performed. If || is larger than the tolerance Δθ _{r, the} total rolling angle Θ continues.
Check whether the sign of = θ _A + θ _B is positive. as a result,
If the sign is positive, the air spring is exhausted, and the vehicle body is raised in the horizontal direction in FIG. On the contrary, when the sign of Θ is negative, the air spring supplies air,
Is exhausted and the car body is raised horizontally.

Effect of the Invention When a railway vehicle is stopped on a gentle curve, the twist of the track is detected from the difference in the relative rolling angle between the car body and the bogie in the air spring parts of the front and rear bogies, and the average height of the left and right air springs is detected. Since the target value is satisfied and the relative rolling angles of the front and rear bogies are controlled to have the same magnitude and opposite signs to each other, the stopper hit of the vehicle body can be eliminated, the riding comfort can be improved, and the noise generation can be reduced. .

[Brief description of drawings]

FIG. 1 is an explanatory view showing a main part of a bolsterless bogie for a railway vehicle equipped with an air spring control device for carrying out the present invention, and FIG. 2 is a perspective view showing a main part of an air spring control device for one vehicle. 3 and 4 are explanatory views showing symbols and heights of the air springs of the front and rear bogies of the railway vehicle, FIG. 4 is a control flowchart of the railway vehicle according to the present invention, and FIG. 5 is a gradually decreasing section of the railway vehicle. It is explanatory drawing which shows the state of the track twist and the state of the air spring of a front-and-rear bogie at the time. 1 ... Car body, 2 ... Bogie frame 3 ... Air spring, 4 ... Air supply pipe 5 ... Electromagnetic air supply valve, 6 ... Original air reservoir 7 ... Electromagnetic exhaust valve, 8 ... Pressure sensor 9 ... Height sensor, 10 ... Controller 11 ... Front bogie, 12 ... Rear bogie

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Koizumi 4-53-3 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Sumitomo Metal Industries, Ltd. (56) Reference JP-A-55-76754 (JP, A) Public Sho 59-41427 (JP, B2)

Claims (1)

[Claims] 1. A vehicle body having front and rear bogies, in which a cant on the relaxation curve is expressed by the following equation, in a system for controlling air supply and exhaust by measuring individual air spring heights of a railway vehicle having a bogie bogie with an air spring. and detected by whether the relative rolling angle theta _a and theta _B are opposite sign between the bogie, and if not reversed code performs normal individual height control, when the opposite sign continued relative rolling angle theta _a and theta _B And the average relative rolling angle || and the relative rolling angle difference tolerance Δθ _r
And the average relative rolling angle || is the tolerance Δθ _r
When the average relative rolling angle || is larger than the tolerance Δθ _r , the relative rolling angle θ
The sign of the total rolling angle Θ of _A and θ _B is detected, and the relative rolling angles of the front and rear bogies are controlled to have the same magnitude and opposite signs. Control method. Where δ ₁ and δ ₂ are deviations of the height of the left and right air springs of the front bogie from the target value, δ ₃ and δ ₄ are deviations of the height of the left and right air springs of the rear bogie from the target value, and b is the distance between the left and right air spring centers.