JP2822839B2 - Fail-safe method of vehicle body tilt control for railway vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fail-safe method for controlling a vehicle body inclination using an air spring of a railway vehicle.

[0002]

2. Description of the Related Art A railway vehicle traveling on a curved road must be run at a speed that is commensurate with the amount of cant. In order to improve the riding comfort on a curved road, the vehicle body may be tilted so as to offset the lateral acceleration. As a method of leaning the car body,
There are several methods. Among them, an apparatus shown in FIG. 3 and a method using an air spring are disclosed in JP-A-58-110368.
There is an apparatus disclosed in Japanese Unexamined Patent Publication (KOKAI) No. HEI 9-86, and shown in FIG.

In the apparatus shown in FIG. 3, a switching valve 13 is provided in the middle of an air line 12 connecting the left and right air springs 3 and the air source 5, and the switching valve 13 of the extension side air spring is opened to send compressed air. At the same time, the switching valve 13 of the compression-side air spring is switched to be released to the atmosphere, and the compressed air is released to the atmosphere to tilt the vehicle body.

In the apparatus shown in FIG. 4, the left and right air chambers 15 of the double-acting pneumatic cylinder 14 and the air spring 3 are connected by air lines 19, respectively, and the left and right sides between the vehicle body 1 and the bogie 2 are connected. The piston 20 is moved to the left and right through a drive device 18 composed of a motor, a rack and a pinion, which is operated by a control signal obtained by arithmetically processing a detection signal from a height detector 16 provided in the controller 17 with a control signal. One of the springs is extended while the other is compressed to incline the vehicle body.

[0005]

In the above-described conventional vehicle body inclination control using an air spring, the air spring is controlled by an electric signal to control a supply valve, an exhaust valve or a cylinder of the air spring to change the height of the air spring, thereby inclining the vehicle body. Let it. Therefore, when an abnormality occurs in the control device or the like, the control is stopped, and the vehicle body is maintained in a tilted state, or air supply and exhaust are continuously performed, and the space between the bogie and the vehicle body is in a state of hitting a stopper. Become. In such a state, not only the riding comfort is poor, but also the safety against overturning of the vehicle is reduced.

The present invention solves the above-described problems in the conventional vehicle body inclination control using an air spring. Even when the vehicle body inclination control device is stopped due to an abnormality or the like, the same level as that of a vehicle that does not perform the conventional vehicle body inclination control. An object of the present invention is to provide a fail-safe method of vehicle body tilt control that can provide a ride comfort and also secure safety against overturning.

[0007]

In order to achieve the above object, a fail-safe method for controlling the body inclination of a railway vehicle according to the present invention comprises a height adjusting valve for mechanically adjusting the height of an air spring of a railway vehicle bogie. Having a switching valve that opens and closes electrically in an air line connecting the height adjustment valve and the air spring;
Separately, in a mechanism equipped with a body inclination control device that has an air supply and exhaust valve that opens and closes electrically in an air line connecting the air source and the air spring, the switching valve opens when there is no voltage The intake and exhaust valves are configured to close when no voltage is applied, and when the vehicle body tilt control fails, the voltage to each valve is set to no voltage, and the height of the air spring is adjusted by the height adjustment valve. And

In addition, a height adjusting valve for mechanically adjusting the height of the air spring of the bogie of the railway vehicle, and an air supply valve which is electrically opened and closed separately in an air pipe connecting between the air source and the air spring. In a mechanism having a vehicle body tilt control device provided with a valve and an exhaust valve, and connected to an air spring via the height adjustment valve and a three-way valve that electrically opens and closes an air supply valve and an exhaust valve, the three-way valve is The height adjustment valve and the air spring communicate with each other when there is no voltage, and the voltage to the three-way valve is set to zero when the vehicle body tilt control fails, and the height of the air spring is adjusted by the height adjustment valve. And

[0009]

According to the first aspect of the present invention, the switching valve is opened when there is no voltage, and the voltage is constantly increased while the vehicle body tilt control is being performed by the vehicle body tilt control device, and the switching valve is in the closed state. It is in. Therefore, the height adjustment valve does not operate as long as the vehicle body tilt control is performed normally.

Further, in the invention of claim 2, the three-way valve is opened so that the height adjustment valve and the air spring communicate with each other when no voltage is applied, and the three-way valve is constantly supplied with voltage while the vehicle body tilt control is being performed by the vehicle body tilt control device. Is pressurized, and the three-way valve is closed between the height adjustment valve and the air spring. Therefore, the height adjustment valve does not operate as long as the vehicle body tilt control is performed normally.

If an abnormality occurs in the vehicle body inclination control device during the vehicle body inclination, the voltage of the switching valve or the three-way valve, the supply valve, and the exhaust valve becomes zero. Then, the switching valve is opened, and the three-way valve is opened so that the height adjustment valve and the air spring communicate with each other, and at the same time, the air supply valve and the exhaust valve are closed. Here, the height adjusting valve is operated, and the leaning vehicle body is restored to a posture substantially parallel to the bogie, and the posture can be maintained to the same degree as a conventional vehicle that does not perform the vehicle body tilt control.

Therefore, there is no puncture of the air spring due to abnormal air supply or exhaust, or no contact with the upper and lower stoppers, and the ride comfort when the vehicle body tilt control device is abnormal can be secured to the same level as that of the conventional vehicle. In addition, safety against overturning can be ensured.

[0013]

【Example】

Embodiment 1 An embodiment of the invention described in claim 1 will be described with reference to FIG. The air source 5 and the left and right air springs 3 are connected by an air line 9 having a height adjustment valve 4 for mechanically adjusting the height of the air spring. A switching valve 10 that opens and closes electrically is provided in the air line, and an air supply valve 6 and an exhaust valve that open and close electrically in an air line 8 that connects between the air source 5 and the air spring 3 are separately provided. In the mechanism provided with the vehicle body inclination control device provided with the switch 7, the switching valve 10 is opened when there is no voltage, and the supply valve 6 and the exhaust valve 7 are closed when there is no voltage.

If the above-described vehicle body tilt control device causes an abnormality during the leaning of the vehicle body, the voltage of the switching valve 10, the supply valve 6, and the exhaust valve 7 becomes zero. Then, the switching valve 10 is opened, and at the same time, the supply valve 6 and the exhaust valve 7 are closed. Here, the height adjusting valve 4 is operated, and the leaning vehicle body is restored to a posture substantially parallel to the bogie, and the posture is maintained to the same degree as the conventional vehicle that does not perform the vehicle body tilt control.

Embodiment 2 An embodiment of the present invention will be described with reference to FIG. The air source 5 and the left and right air springs 3 are connected by an air line 9 having a height adjusting valve 4 for mechanically adjusting the height of the air springs, and separately between the air source 5 and the air springs 3. The vehicle body inclination control device is provided with an air supply valve 6 and an exhaust valve 7 which are electrically opened and closed in an air line 8 connecting the height control valve and the height adjustment valve 4 and the air supply valve 6 and the exhaust valve 7 are electrically connected. In the mechanism connected to the air spring via the three-way valve 11 which opens and closes at 3, the three-way valve is configured so that the height adjustment valve 4 and the air spring 3 communicate with each other when there is no voltage.

If the above-mentioned vehicle body tilt control device causes an abnormality during the leaning of the vehicle body, the voltage of the switching valve 10, the supply valve 6, and the exhaust valve 7 becomes zero. Then, the three-way valve 11 opens so that the height adjustment valve 4 and the air spring 3 communicate with each other, and at the same time, the air supply valve 6 and the exhaust valve 7 are closed. Here, the height adjusting valve 4 is operated, and the leaning vehicle body is restored to a posture substantially parallel to the bogie 2, and the posture can be maintained to the same degree as the conventional vehicle that does not perform the vehicle body tilt control.

[0017]

According to the fail-safe method for controlling the vehicle body inclination according to the present invention, even if the vehicle body inclination control device is stopped due to an abnormality or the like, the same ride comfort as that of a conventional vehicle which does not perform the vehicle body inclination control can be obtained. In addition, safety against overturning can be secured.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the invention described in claim 1;

FIG. 2 is an explanatory view showing an embodiment of the invention described in claim 2;

FIG. 3 is an explanatory diagram showing an example of a conventional vehicle body inclination control method using an air spring.

FIG. 4 is an explanatory diagram showing another example of a conventional vehicle body inclination control method using an air spring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 bogie 3 Air spring 4 Height adjustment valve 5 Air source 6 Air supply valve 7 Exhaust valve 8 Air line 9 Air line 10 Switching valve 11 Three-way valve 12 Air line 13 Switching valve 14 Pneumatic cylinder 15 Air chamber 16 Height detector 17 Controller 18 Drive device 19 Air line 20 Piston

Claims (2)

(57) [Claims] 1. A switching device which has a height adjustment valve for mechanically adjusting the height of an air spring of a bogie of a railway vehicle, and which is electrically opened and closed in an air line connecting the height adjustment valve and the air spring. In a mechanism provided with a valve and a vehicle body inclination control device provided with an air supply valve and an exhaust valve which are electrically opened and closed in an air pipe connecting between an air source and an air spring separately from the switching valve, The air supply valve and the exhaust valve are configured to open when there is no voltage, and close when there is no voltage.When the vehicle body tilt control fails, the voltage to each valve is made no voltage, and the height of the air spring is adjusted by the height adjustment valve. A fail-safe method for controlling the inclination of a vehicle body of a railway vehicle. 2. A height adjustment valve for mechanically adjusting the height of an air spring of a bogie of a railway vehicle, and separately supplied air that is electrically opened and closed in an air line connecting an air source and the air spring. In a mechanism having a vehicle body tilt control device provided with a valve and an exhaust valve, and connected to an air spring via the height adjustment valve and a three-way valve that electrically opens and closes an air supply valve and an exhaust valve, the three-way valve is The height adjustment valve and the air spring communicate with each other when there is no voltage.When the vehicle body tilt control fails, the voltage to the three-way valve is set to zero, and the height of the air spring is adjusted by the height adjustment valve. Fail-safe method of vehicle body tilt control for railway vehicles.