JPH0659825B2 - Railway vehicle air spring control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for controlling an air spring on a relaxation curve of a railway vehicle having a bogie bogie with an air spring.

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. 4, when a railroad vehicle enters a curve of a curved road, that is, a cant diminishing 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.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, when the railway vehicle having the air spring carriage 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 invention eliminates the above-mentioned drawbacks found in the conventional air spring bogies that individually adjust the height of the air springs, and does not supply or exhaust the air springs while the railway vehicle is stopped in the cant diminishing section. This is to propose a method for controlling an air spring of a railway vehicle.

Means for Solving the Problems In order to achieve the above object, an air spring control method for a railway vehicle according to the present invention is to control air supply / exhaust by measuring individual air spring heights of a railway vehicle having a bogie bogie with an air spring. Whether the relative rolling angles θ _A and θ _B between the front and rear bogies of the front and rear bogies have opposite signs as shown in Equations 1 and 2 below. If the sign is not the opposite sign, normal individual height control is performed, and if the sign is opposite, the average height deviations δ _A and δ _B of the left and right air springs of each truck are within the tolerance δ _{0 of the} target height. Δ ₀
When it is not within the range, the left and right air spring height control is performed for each trolley, and when it is within the tolerance δ ₀ , the supply and exhaust of the air spring is stopped.

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 railroad vehicle is in the gradually decreasing section, it is detected whether the relative rolling angles θ _A and θ _B between the vehicle body and the bogie in the front and rear bogies shown in the above equations 1 and 2 have opposite signs. Normal individual height control is performed, and when the signs are opposite, it is further detected whether the average height deviations δ _A and δ _B of the left and right air springs of each truck are within the tolerance δ _{0 of the} target height, and the tolerance is calculated. When it is not within δ ₀ , the height control of the left and right air springs is performed for each carriage, and when it is within the tolerance δ ₀ , the air supply and exhaust of the air spring is stopped.

Example An example 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, and the detection signal from each height sensor (9) is input, and each electromagnetic air supply valve (5) and each exhaust valve ( 7) is provided so as to transmit a signal of valve opening / closing operation, where the information on the height of the air spring is compared and calculated with the target height, and the relative rolling angles θ _A , θ _B between the vehicle body and the bogie in the air spring portion are further calculated. In order to control the supply and exhaust of the air spring,

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

Now, the left and right air spring heights of the first truck are h ₁ and h ₂ , the left and right air spring heights of the second truck are h ₃ and h ₄ , the distance between the left and right air spring centers is b, and the target height of the air spring is Sa h _r ± δ ₀
And then, b and h _r ± δ ₀ is kept inputted to the controller set. Note that δ ₀ is a tolerance, which 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 cant diminishing section, the air spring height h calculated by the height sensor (9) attached to 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 first truck and the relative rolling angle θ _B in the air spring portion of the second truck are compared to detect the track twist. In this case θ
_{If A} and θ _B have the same sign, there is no orbital twist, and normal individual height control is performed. Also, if θ _A and θ _B have opposite signs, there is a twist in the raceway, so it is continuously compared whether the air spring average height deviations δ _A and δ _B are within the tolerance δ ₀ , and the value of the deviation is If the tolerance is greater than δ ₀ ,
Air spring height control is performed by operating solenoid valves for each related trolley according to a command from the controller (10) to supply or exhaust air.

The air supply / exhaust at this time may be performed simultaneously with the air supply to the left and right air springs, or may be performed with only one air spring.

By the above automatic operation, the left and right air spring average height target values h
_{When r} ± δ ₀ , supply / exhaust of the air spring is stopped.

Effect of the Invention When a railroad vehicle is stopped on a gentle curve, the twisting of the track is detected from the difference in the relative rolling angle between the vehicle body and the bogie in the air spring parts of the front and rear bogies, and the air spring for each bogie is supplied and exhausted. By controlling the average height of the left and right air springs, the vehicle on the relaxation curve can be held in a stable state. Also,
When the height of the air spring is within the target value, the supply and exhaust of the air spring are stopped, so the load on the air compressor 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. FIG. 3 is a flow chart of air spring height control according to the present invention, and FIG. 4 is an explanatory view showing track twist and a state of air springs of front and rear bogies when a railway vehicle is in a cant diminishing section. 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 4-533 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Sumitomo Metal Industries, Ltd. (56) Reference JP-A-3-82666 (JP, A) Kai 55-76754 (JP, A) Special public Sho 59-41427 (JP, B2) Actual public 52-45084 (JP, Y2)

Claims (1)

[Claims] 1. In a system for controlling air supply / exhaust control by measuring individual air spring heights of a railway vehicle having a bogie bogie with an air spring, a cant reduction on a relaxation curve is represented by a vehicle body in front and rear bogies represented by the following equation. Detects whether the relative rolling angles θ _A and θ _B between the bogies have opposite signs. If they do not have the opposite signs, normal individual height control is performed. If they have the opposite signs, the average height of the left and right air springs of each bogie is further detected. It is detected whether the deviations δ _A and δ _B are within the tolerance δ _{0 of the} target height value. If the tolerances δ ₀ are not within the tolerance δ ₀ , the left and right air spring height control is performed for each carriage to determine whether the tolerance is within the tolerance δ ₀ . The air spring control method for a railway vehicle is characterized in that the supply and exhaust of the air spring is stopped when 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.