JPS6235942B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a vehicle body tilting device, and more particularly to a vehicle body tilting device suitable for tilting a vehicle body when a rail vehicle passes through a high-speed curve.

[Background of the invention]

When a train passes through a curved road, it can run at high speed and the rails on the inside of the curve are lowered to make it more comfortable for passengers.However, when a train stops on a curve, etc. Considering that there is a risk of overturning, there is a certain limit to the size of cant, and for this reason, when passing a curved road, the vehicle body is tilted to the inside of the curve.

This method of tilting the vehicle body is equipped with a ground signal receiver 3 that receives a vehicle body tilt signal from a vehicle lateral acceleration detector or a ground device, and according to the command, supports the vehicle body as shown in FIG. There is a method in which the height of the air spring 2 is controlled, or a method in which the vehicle body 1 is tilted by hydraulic cylinders 7 arranged in parallel with the left and right air springs 6 as shown in FIG.
Here, 4 is a truck and 5 is an axial spring. Among these methods, when control is performed using tilt commands from ground equipment, the leading vehicle is equipped with a computer, detects the running speed, and can issue all commands to each vehicle from the leading vehicle. This feature simplifies the control equipment to be installed on the system.

As mentioned above, the system in which the leading car gives tilt instructions to each bogie has been conceptually proposed for several years; No proposal has been made.

The conventional example shown in FIG. 3 shows a fail-safe method in vehicle body tilt control using an air spring. That is, the space between the car body 1 and the bogie 4 is supported by the left and right air springs 2, 2', and the air supply valves 9, 9' and the exhaust valve 10 are installed in the middle of piping that communicates the air reservoir 8 with the air springs 2, 2'. , 10' are installed, and these supply and exhaust valves are turned on and off by signals from a controller 12, and a check circuit 13 consisting of an abnormal acceleration detector, a logic circuit, a fuse, an emergency button, etc. is installed. and exhaust valve 10,1
0' or separately provided emergency exhaust valve 11,1
1' can now be operated. Between the car body 1 and the bogie 4, there are stoppers 14, 14' for vertical movement that do not interfere with the car body tilt control.
is provided. If the control device malfunctions due to a failure in the controller 12, etc., the check circuit 13 opens the exhaust valves 10, 10' to exhaust air from the air springs 2, 2', and compresses the air springs 2, 2' to retract the vehicle body 1. It is supported by stoppers 14 and 14' to ensure fail-safety.

However, such a conventional technique requires a check circuit 13 for each car body in a train formation, which is expensive, and there is a problem in that ensuring reliability is expensive.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a simple, inexpensive, and highly safe car body tilting device that has control system abnormality countermeasures suitable for a control system in which a leading car issues tilting instructions to each bogie.

[Summary of the invention]

The key point of the present invention is to detect the tilt angle of each vehicle body or the corresponding lateral acceleration of the vehicle body and input it into the above-mentioned computer, configure a feed bar loop in the computer, and simultaneously detect abnormalities to achieve fail-safety. It was planned.

Furthermore, the second point of the present invention is that a malfunction of the computer itself is detected by a check circuit provided only in the leading vehicle, and a countermeasure process is taken against the malfunction.

The third point is that one solenoid valve is installed between the tilting fluid operating mechanism attached to each car body and the fluid source attached to one car body, and the valve is operated by the output of the above-mentioned computer. The output to the fluid operating mechanism is turned on only when the vehicle is normally traveling around a curve, thereby achieving fail-safety and energy savings at the same time.

[Examples of the Invention] The present invention will be described in detail below with reference to Examples. FIGS. 4 and 5 are equipment configuration and control block diagrams showing one embodiment of the present invention. In FIG. 4, reference numeral 7 denotes a hydraulic cylinder as a fluid operating mechanism provided between the vehicle body 1 and the truck 4, and is attached to the air spring 6 as in the conventional example shown in FIG. 21 is a hydraulic servo valve, 23 is a pump, 24 is an accumulator, 24' is a solenoid valve, 23' is a hydraulic power source, and 22 is a displacement gauge attached to the hydraulic cylinder 7, which is configured using a direct-acting potentiometer. has been done. The block diagram in FIG. 5 shows a four-car train as an example, and all the bogies are equipped with the above-mentioned hydraulic cylinders 7, etc. Therefore, for the same components on each trolley, the symbol
The numbers will be indicated by subscripting f ₁ to r _o . Here, f indicates a component related to the front bogie of one vehicle, r indicates a component related to the rear bogie, and the subscripts 1 to n following f and r indicate the numerical order of both in the formation.

In the figure, 7 is the hydraulic cylinder shown earlier, 2
Reference numeral 1 denotes a hydraulic servo valve that operates the hydraulic servo valve, 22 a displacement meter that detects the stroke of the hydraulic cylinder 7, and its output is taken into a microcomputer 28 used as a computing device. The output of the microcomputer 28 is sent to a control circuit 2 consisting of an amplifier, etc.
0 to operate the hydraulic servo valve 21. In this embodiment, a control device 19 is configured by combining a control circuit 20 and a hydraulic servo valve 21. The microcomputer 28 includes a central processing unit 29, a clock 30, a memory 31, and an interface 32.
5, D/A converter 33, demultiplexer 34,
It is composed of an A/D converter 36 and a multiplexer 37. 25 is a running speed detector, 26 is a central control room that manages the operation of the vehicle, and 27 is curve information given from the central control room.

The functions of the vehicle body tilting device configured as described above will be explained in detail. Shortly before the transition curve is reached, curve information 27 is issued in response to instructions from the central control room 26 and is taken into the microcomputer 28 . The curve information 27 includes the cant C ₀ (including the sign) of the curve, the radius of curvature R ₀ , the transition curve lengths S ₁ and S ₂ at the curve entrance and exit, and the circular curve length S ₂ . The curve information 27 and traveling speed taken into the multiplexer 37 of the microcomputer 28 are sent to the A/D converter 3 under the instructions of the central processing unit 29.
6, transmitted to the central processing unit 29 via the interface 35. Based on this content, the central processing unit 29 calculates a stroke command for the hydraulic cylinder 7, which is determined from the tilt instruction amount of the vehicle body when traveling on a curve, according to the program in the memory 31, and sends the stroke command to the hydraulic cylinder 7 via the interface 32 and the D/A converter 33. from the demultiplexer 34 to the control circuit 20 of each truck.
Output to. The clock 30 serves as a timer for the central processing unit 29 to run various programs and to instruct the timing of the demultiplexer 34 and multiplexer 37.
Under instructions from the interface 32, the demultiplexer 34 branches the output of the D/A converter 33 to the control circuit 20 of each truck for output. Since the timing of this branching can be up to about 100 Hz, strictly speaking, the slope commands transmitted to each control circuit 20 change in a stepwise manner, but since the target control content is a low cycle, this sufficiently satisfies the requirements.

In accordance with this command, the control circuit 20 operates the hydraulic servo valve 21 to operate the hydraulic cylinder 7. Therefore, the cant of the curve of the vehicle body 6 is inclined according to the radius of curvature and the centrifugal force caused by the traveling speed, and the floor area acceleration approaches zero.

While performing tilt control in this way, the output of the displacement meter 22 attached to the hydraulic cylinder 7 of each truck is constantly taken into the microcomputer 28 , and the microcomputer 28 presets the value (maximum When there is an abnormality compared to the tilt angle or an amount equivalent thereto), a warning of the abnormality is given to the driver's cab, and at the same time, the tilt command output to the control circuit 20 is set to zero. If the abnormality still persists, the solenoid valve 24' is operated to stop the supply to the hydraulic cylinder 7. Therefore, in the event of an abnormality, the vehicle does not have an inclination control device, so if the speed is reduced based on a warning in the driver's cab, an extremely safe control system can be constructed.

In the above embodiment, since the tilt control is performed by simply giving a tilt command to the hydraulic servo valve 21, it is necessary to give the tilt command a complicated waveform that takes into account the characteristics of the control system including the vibration system of the vehicle body. For this purpose, the hydraulic cylinder 7 of each truck detected for fail-safe
If a system is adopted in which the amount of displacement is fed back to the control circuit 20, the instructions for the computer will be simpler and controllability will be improved, and at the same time, the burden on the computer itself will be reduced, resulting in higher reliability. It is also possible to discontinue the feedback to the control circuit 20 and create a feedback loop within the computing machine. In this case, the control circuit 20
It is only necessary to have the function of increasing the width, so it is simple,
Highly accurate controllability can be obtained at low cost.

Another embodiment of the invention is shown in FIG. This embodiment differs from the embodiment shown in FIG. 5 earlier in that a control valve 43 is provided in place of the solenoid valve 24', and a check circuit 40 includes a vehicle body acceleration detector 41 and a comparator for only the leading vehicle. 42 is provided, and when either one of the abnormality command from the microcomputer 28 and the abnormality command from the check circuit 40 is activated, the control valve 43 operates to stop the supply of hydraulic pressure to the hydraulic cylinder 7. Therefore, according to this embodiment, malfunctions of the microcomputer itself can be detected, so that an extremely safe vehicle body tilting device can be constructed.

〔Effect of the invention〕

According to the present invention, control system abnormality countermeasures suitable for a control system in which tilting instructions for each bogie are given by a computer in the lead car are taken, so that an extremely simple, inexpensive, and highly safe car body tilting device is obtained. be able to. Furthermore, since hydraulic pressure can be supplied to the hydraulic cylinder only while the vehicle is normally traveling around a curve, power can be saved.

[Brief explanation of the drawing]

1 to 3 are front views showing a vehicle body tilting device according to the prior art, FIGS. 4 and 5 are a configuration diagram and a control block diagram of an embodiment of the vehicle body tilting device of the present invention, and FIG. 6 is a front view showing a vehicle body tilting device according to the prior art. FIG. 3 is a control block diagram showing another embodiment of the present invention. 1...Vehicle body, 2...Air spring (for control), 3...
... Vehicle lateral acceleration detector, 6 ... Air spring (for vehicle body support), 7 ... Hydraulic cylinder (fluid operation mechanism), 1
9... Control equipment, 22... Displacement meter, 23'... Hydraulic source (fluid source), 24'... Solenoid valve, 25... Traveling speed detector, 27... Curve information receiver, 28 ...
Microcomputer (computer), 40 ...Check circuit.

Claims (1)

[Scope of Claims] 1. A pillow spring that supports each car body in a train set, or a fluid operating mechanism provided in parallel with the pillow spring, a control device that operates the pillow spring or fluid operating mechanism, a traveling speed detector, and curve information. receiver,
In a vehicle body tilting device comprising a computing machine that inputs the outputs of the traveling speed detector and the curve information receiver and gives a tilting instruction to the control device, the tilting angle of each vehicle body or an amount equivalent thereto is detected and sent to the computing machine. A vehicle body tilting device characterized in that a detector is provided to output an output, and an abnormality is detected by comparing it with a set value in a computing machine. 2. A car body tilting device according to claim 1, wherein a check circuit is provided in one of the car bodies of a train set. 3. The vehicle body tilting device according to claim 1, wherein a feedback loop is configured in a computing machine based on the output of the detector.