JP5222700B2 - Solenoid valve control device - Google Patents

Description

  The present invention relates to a solenoid valve control device.

A fuel gas supply system for supplying fuel gas to gas consuming equipment is provided with an on-off valve for permitting or shutting off the flow of the fuel gas, and an electromagnetically driven so-called electromagnetic valve is frequently used for this on-off valve. ing.
Further, as a technique for improving the sealing performance of the solenoid valve installed in the fuel gas supply system, the pressure on the downstream side of the solenoid valve is reduced by consuming fuel gas with a gas consuming device even after the solenoid valve is closed. In addition, it is known that the pressure difference between the upstream and downstream of the electromagnetic valve is ensured by a predetermined value or more, thereby increasing the closing force of the electromagnetic valve and improving the sealing performance (see, for example, Patent Document 1).
JP 2006-156320 A

The above-described method for improving the sealing performance of the solenoid valve is based on the premise that the solenoid valve is correctly closed, and is ineffective when the solenoid valve has caused a valve closing failure.
By the way, in general, the valve temporarily becomes poorly closed due to various causes (for example, sliding failure when the valve body has a sliding portion) or temporarily reaches the fully open position. There may be a valve opening failure that is stopped .
In such a case, the valve itself is not broken, so there is no need for replacement or repair. However, even if it is temporary, it is not possible to leave a defective state, so a response is required. .
In view of this, the present invention provides a solenoid valve control device that can eliminate a temporary valve closing failure or a valve opening failure that is stopped in the middle of reaching the fully open position .

The electromagnetic valve control device according to the present invention employs the following means in order to solve the above problems.
The invention according to claim 1 is an electromagnetic valve (for example, an embodiment described later) connected to a tank (for example, a fuel storage tank 10 in an embodiment described later) for storing a fluid (for example, a fuel gas in an embodiment described later). And the pressure in the flow path (for example, the outer supply passage 14 in the embodiment described later) downstream from the valve body (for example, the main valve 19 in the embodiment described later) in the solenoid valve. A pressure sensor to be detected (for example, a pressure sensor 50 in an embodiment to be described later), and a control unit (for example, a control device 52 in an embodiment to be described later) for controlling the opening and closing of the electromagnetic valve according to the consumption state of the fluid ; wherein the control means, after giving the close command to the solenoid valve, when the pressure detected by the pressure sensor after the previous SL close instruction does not become less than a predetermined pressure value Gives the opening command for correction is set the duration in response to the temperature on the solenoid valve, which is followed by the solenoid valve control apparatus characterized by providing a close instruction.
When the pressure detected by the pressure sensor after the closing command (that is, the pressure in the flow path downstream from the valve body) does not become a predetermined pressure value or less, it is estimated that the valve is temporarily closed. The valve closing failure can be canceled by giving an open command to the solenoid valve to cause the valve to open, and then the valve can be closed normally by giving the close command again.

According to a second aspect of the present invention, in the first aspect of the present invention, after the closing command after the correction opening command, the control means again detects a pressure detected by the pressure sensor below the predetermined pressure value. It is characterized by determining whether or not.
By comprising in this way, it can be confirmed whether the temporary valve closing defect was able to be cancelled | released.

The invention according to claim 3 is the invention according to claim 1 or 2, characterized in that the correction opening command is generated as a pulse-like signal.
By comprising in this way, a valve body can be made easy to move at the time of the opening instruction for correction.

The invention according to claim 4 is an electromagnetic valve (for example, an embodiment described later) connected to a tank (for example, a fuel storage tank 10 in an embodiment described later) for storing a fluid (for example, a fuel gas in an embodiment described later). And the pressure in the flow path (for example, the outer supply passage 14 in the embodiment described later) downstream from the valve body (for example, the main valve 19 in the embodiment described later) in the solenoid valve. A pressure sensor to be detected (for example, a pressure sensor 50 in an embodiment to be described later), and a control unit (for example, a control device 52 in an embodiment to be described later) for controlling the opening and closing of the electromagnetic valve according to the consumption state of the fluid ; wherein the control means, after the consumption of the fluid giving an open command to the solenoid valve is initiated, prior SL reduction ratio predetermined reduction spite of the pressure detected by the pressure sensor The case is more than the estimated electromagnetic valve is caused to open failure is a state where stops on the way reaching the fully open position, closed orthodontic set the duration in response to the temperature on the solenoid valve A command is given, and then an open command is given.
When the rate of decrease in the pressure detected by the pressure sensor after the opening command is given and the consumption of the fluid is started (that is, the pressure in the flow path downstream from the valve body) is equal to or higher than a predetermined rate, the solenoid valve It is estimated that the valve opening failure is temporarily stopped in the middle of reaching the fully open position, and at this time, the valve opening failure can be canceled by giving a closing command to the solenoid valve to close the valve. The valve can be opened normally by giving an opening command.

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, after the opening command after the correction closing command, the control means again has a rate of decrease in pressure detected by the pressure sensor as the predetermined value. It is characterized by determining whether it is more than a fall rate.
By comprising in this way, it can be confirmed whether the temporary valve opening defect which is the state which the solenoid valve stopped in the middle of reaching a full open position was able to be cancelled | released.

The invention according to claim 6 is characterized in that, in the invention according to claim 4 or 5, the closing command for correction is generated as a pulse signal.
By comprising in this way, a valve body can be made easy to move at the time of a correction opening command.

According to the first aspect of the present invention, the temporary valve closing failure can be canceled, and the reliability of the electromagnetic valve is improved.
According to the invention which concerns on Claim 2, since it can be confirmed whether the temporary valve closing defect was able to be cancelled | released, the reliability of a solenoid valve further improves.
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According to the invention which concerns on Claim 3, a valve body can be made easy to move at the time of a correction | amendment close command.

According to the invention which concerns on Claim 4 , the temporary valve opening defect which is the state which the solenoid valve stopped in the middle of reaching a full open position can be cancelled | released, and the reliability of a solenoid valve improves.
According to the fifth aspect of the invention, since it is possible to confirm whether or not the temporary valve opening failure, which is a state where the electromagnetic valve has stopped in the middle of reaching the fully open position, can be resolved, the reliability of the electromagnetic valve The nature is further improved.
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According to the invention which concerns on Claim 6, it can make it easy to move a valve body at the time of a correction | amendment opening command.

Embodiments of an electromagnetic valve control device according to the present invention will be described below with reference to the drawings of FIGS.
FIG. 1 is a cross-sectional view showing a state where the electromagnetic valve 1 is attached to the fuel storage tank 10.
The fuel storage tank 10 is filled with high-pressure hydrogen gas as fuel gas, and is used to supply hydrogen gas to the anode electrode of the fuel cell.
The solenoid valve 1 is attached to the take-out port 12 of the fuel storage tank 10, and the valve body 11 of the solenoid valve 1 is fixed to the take-out port 12 as a sealing plug. The valve body 11 has an inner supply passage 13 that communicates with the inside of the fuel storage tank 10, and an outer supply passage (downstream passage) 14 that communicates with a fuel cell (not shown) outside the fuel storage tank 10. Is formed. In the figure, reference numeral 15 denotes a screw fixing portion between the valve body 11 and the fuel storage tank 10, and reference numeral 16 denotes a ring-like elastic made of a rubber material that seals between the valve body 11 and the fuel storage tank 10. A sealing member is shown. A configuration in which the solenoid valve 1 is directly attached to the fuel storage tank 10 as in this embodiment is also included in the “solenoid valve connected to the tank”.

  FIG. 2 is an enlarged cross-sectional view of the solenoid valve 1 in a valve-closed state. The valve body 11 has a substantially cylindrical valve accommodating portion 17 so that the inner supply passage 13 and the outer supply passage 14 are communicated with the valve body 11. Is provided. A cylindrical main valve seat 18 that communicates with the outer supply passage 14 is provided protruding from the center of the wall of one end (upper end in the drawing) of the valve housing portion 17 in the axial direction. Further, the end portion of the inner supply passage 13 is opened at a position facing the side surface of the main valve seat 18 near one end of the valve housing portion 17 in the axial direction.

  A main valve (valve element) 19 that opens and closes the outer supply passage 14 by abutting and separating from the main valve seat 18 is accommodated in the valve accommodating portion 17 so as to freely advance and retract. The main valve 19 includes a thick disc-shaped valve head 20 and a guide tube portion 21 coaxially connected to the valve head 20, and the valve head 20 slides on the peripheral wall of the valve housing portion 17. It is freely housed. An annular groove 22 is formed on the outer peripheral surface of the valve head 20, and an annular elastic seal member 23 made of a rubber material is fitted and fixed in the annular groove 22. The elastic seal member 23 allows fuel gas to flow between the valve head 20 and the valve housing portion 17 while allowing the main valve 19 to move forward and backward by sliding with the peripheral wall of the valve housing portion 17 and elastic deformation of the elastic seal member 23 itself. Shut off.

  A pilot passage 24 that penetrates the valve head 20 in the axial direction is provided at the axial center position of the valve head 20. The pilot passage 24 is formed so as to be coaxial with the main valve seat 18 of the valve accommodating portion 17. Here, the main parts of the valve head 20 and the guide cylinder part 21 are integrally formed of a metal material, but the peripheral part of the pilot passage 24 of the valve head 20 is formed by a separate rubber-like elastic member 25. Has been. The end surface of the rubber-like elastic member 25 on the main valve seat 18 side is in close contact with the main valve seat 18 when the main valve 19 is closed.

  On the other hand, a substantially cylindrical pilot valve 26 is accommodated inside the guide tube portion 21 so as to be able to advance and retract. A valve protrusion 27 is provided on the end face of the pilot valve 26 on the valve head 20 side, and this valve protrusion 27 contacts the hole edge (pilot valve seat 28) of the pilot passage 24 on the end face of the rubber-like elastic member 25. It can be contacted and separated.

  Further, an electromagnetic drive unit 30 for opening and closing the main valve 19 and the pilot valve 26 is integrally incorporated in the valve body 11. The drive unit 30 is provided with a concave portion 33 at the axial center position of a casing 32 that accommodates the electromagnetic coil 31, and a plunger 34 made of a magnetic material is slidably accommodated in the concave portion 33. The recess 33 is open to the valve housing 17 side and is formed coaxially with the valve housing 17. A spring 35 as an urging means is interposed between the concave portion 33 and the plunger 34, and the plunger 34 is constantly urged toward the valve accommodating portion 17 by the spring 35.

  A concave portion 36 is formed on the end surface of the plunger 34 on the valve housing portion 17 side, and the guide tube portion 21 of the main valve 19 is inserted into the concave portion 36. A connection pin 37 is attached to the plunger 34 so as to cross the recess 36 in a direction perpendicular to the axis, and the guide cylinder portion 21 of the main valve 19 and the pilot valve 26 inside thereof are connected to the plunger 34 by the connection pin 37. Has been. However, the connecting pin 37 is fitted and fixed to the pilot valve 26 with almost no gap, but has a slight play in the long hole 38 provided in the guide tube portion 21 with respect to the main valve 19. Connected. Therefore, when the plunger 34 receives the magnetic force of the electromagnetic coil 31 and is operated against the force of the spring 35, the pilot valve 26 is first displaced integrally with the plunger 34, and when the pilot valve 26 is displaced by a predetermined amount, the plunger The operating force is transmitted from 34 to the main valve 19.

  The main valve 19 divides the inside of the valve accommodating portion 17 into an inner conduction chamber 39 that is always in communication with the inner supply passage 13 and an intermediate chamber 40 that faces the plunger 34 side. An orifice passage 41 that communicates the inner conduction chamber 39 and the intermediate chamber 40 is formed at the outer peripheral edge of the main valve 19 that is separated from the pilot passage 24 (axial center). The opening area of the orifice passage 41 is set smaller than the opening area of the pilot passage 24.

The gas pressure in the inner conduction chamber 39 acts on the main valve 19 as a pressing force against the biasing force of the spring 35 (the pressing force in the valve opening direction), and the gas pressure in the intermediate chamber 40 is the same as the biasing force of the spring 35. It acts on the main valve 19 as a pressing force in the direction (a pressing force in the valve closing direction). Further, the pressure receiving area on the inner conduction chamber 39 side of the main valve 19 and the pressure receiving area on the intermediate chamber 40 side are set to be substantially the same area. Therefore, when there is a pressure difference between the inner conduction chamber 39 and the intermediate chamber 40, a pressing force corresponding to the pressure difference acts on the main valve 19.
In the figure, reference numerals 48 and 49 denote annular elastic seal members made of a rubber material that seals between the valve body 11 and the drive unit 30.

  As shown in FIG. 1, a pressure sensor 50 for detecting the pressure in the outer supply passage 14 is attached to the valve body 11. The pressure sensor 50 outputs an output signal corresponding to the detected pressure to the control device (control means) 52. The control device 52 gives an open command or a close command to the electromagnetic valve 1 according to the operating state of the fuel cell, energizes the electromagnetic coil 31 when the open command is issued, and stops the energization when the close command is issued. 1 is controlled to open and close. In the figure, reference numeral 54 denotes a battery for supplying power to the control device 52 and the electromagnetic coil 31.

  3 and 4 show the operating state of the solenoid valve 1 when the fuel gas in the fuel storage tank 10 is supplied to the fuel cell through the outer supply passage 14. Hereinafter, the operation of the solenoid valve 1 when fuel gas is supplied to the fuel cell will be described with reference to FIGS.

  When the electromagnetic coil 31 is not energized, the main valve 19 and the pilot valve 26 are pressed against the main valve seat 18 and the pilot valve seat 28 by the urging force of the spring 35 as shown in FIG. The At this time, the pressure of the fuel gas in the fuel storage tank 10 acts on the inner conduction chamber 39 via the inner supply passage 13 and further acts on the intermediate chamber 40 via the orifice passage 41. Accordingly, at this time, the pressure in the inner conduction chamber 39 and the pressure in the intermediate chamber 40 are substantially the same. Further, the pressure in the inner conduction chamber 39 and the intermediate chamber 40 is higher than the pressure in the outer supply passage 14 on the fuel cell side.

When the electromagnetic coil 31 is energized from this closed state, the plunger 34 is attracted by the magnetic force of the electromagnetic coil 31, and the pilot valve 26 having a small seating area is separated from the pilot valve seat 28 on the main valve 19, as shown in FIG. Do (open). As a result, the pilot passage 24 is opened, and the fuel gas in the intermediate chamber 40 is supplied to the outer supply passage 14 through the pilot passage 24. Further, at this time, the fuel gas flows from the inner conduction chamber 39 into the intermediate chamber 40 through the orifice passage 41. However, since the opening area of the orifice passage 41 is set smaller than the opening area of the pilot passage 24, the intermediate chamber 40. Is lower than the pressure in the inner conduction chamber 39. Therefore, immediately after the pilot valve 26 is opened, a pressing force corresponding to the differential pressure between the inner conduction chamber 39 and the intermediate chamber 40 acts on the main valve 19 as an assisting force in the valve opening direction, and this assisting force is applied to the electromagnetic coil. Combined with the suction force 31, the main valve 19 is moved away from the main valve seat 18 as shown in FIG. 4. Thus, when the main valve 19 is opened, the fuel gas in the fuel storage tank 10 is supplied from the inner supply passage 13 to the fuel cell through the outer supply passage 14. Then, after the pressure in the inner conduction chamber 39 and the pressure in the intermediate chamber 40 become the same pressure, the open state of the main valve 19 (in other words, the open state of the electromagnetic valve 1) is maintained by the magnetic force of the electromagnetic coil 31. Is done.
When the energization of the solenoid valve 31 is stopped from this open state, the plunger 34 is pushed back to the valve accommodating portion 17 side by the biasing force of the spring 35, and the main valve 19 and the pilot valve 26 are moved to the main valve seat 18 and the pilot valve seat 28. Sit down and close the valve.

Even in the electromagnetic valve 1 configured as described above, although the electromagnetic valve 1 is normal, the valve is temporarily closed due to some cause or temporarily stopped in the middle of reaching the fully open position. It cannot be said that there is absolutely no case of valve opening failure.
For example, in order to allow the valve head 20 of the main valve 19 to slide along the peripheral wall of the valve housing portion 17, between the outer peripheral surface of the valve head 20 and the peripheral wall of the valve housing portion 17, There is a slight gap. Therefore, when the main valve 19 slides, the axial center direction of the main valve 19 may not coincide with the axial center direction of the valve housing portion 17. In such a case, the main valve 19 may be tilted and seated with respect to the main valve seat 18 in the valve closing state, resulting in a valve closing failure and a seal failure. In addition, in the valve opening state, the main valve 19 may be fully opened. It is also conceivable that the main valve 19 may be caught on the peripheral wall of the valve accommodating portion 17 in a state where the main valve 19 is inclined on the way to the position, resulting in a valve opening failure.

Therefore, in this electromagnetic valve control device, the pressure in the outer supply passage 14 after the closing command of the electromagnetic valve 1 or after the opening command is monitored by the pressure sensor 50, and the electromagnetic valve 1 is temporarily closed based on this pressure. Determine whether there is a valve opening failure that is in the middle of reaching a defective or fully open position, causing a temporary valve closing failure or a valve opening failure that is in the middle of reaching the fully open position. If it is determined that the solenoid valve 1 is moved at least once in the direction opposite to the command, then the solenoid valve 1 is moved again in the same direction as the command so that a temporary valve closing failure or a fully open position is reached. Eliminate valve opening failure that has stopped .
The fuel cell system connected to the outer supply passage 14 of the solenoid valve 1 reduces the amount of fuel gas remaining in the fuel supply system of the fuel cell and reduces the residual pressure when the operation of the fuel cell is stopped. Therefore, it is assumed that the fuel cell is operated for a predetermined time after the closing command of the solenoid valve 1 and the fuel gas remaining in the fuel supply system is consumed.

Hereinafter, each release control will be described.
First, the temporary valve closing failure canceling control will be described with reference to the flowchart of FIG. Note that the temporary valve closing failure release control routine shown in the flowchart of FIG.

First, in step S101, it is determined whether or not there is an instruction to close the solenoid valve 1.
If the determination result in step S101 is “NO” (no close command), the execution of this routine is temporarily terminated.
If the determination result in step S101 is “YES” (with a close command), the process proceeds to step S102, where it is determined whether or not the pressure in the outer supply passage 14 detected by the pressure sensor 50 is equal to or lower than a predetermined pressure. To do.
If the determination result in step S102 is “YES” (predetermined pressure or less), the solenoid valve 1 is normally closed, and thus the execution of this routine is temporarily terminated.

On the other hand, when the determination result in step S102 is “NO” (greater than the predetermined pressure), it is estimated that the solenoid valve 1 has temporarily closed, and the process proceeds to step S103. Give corrective opening command.
The reason why it is estimated that the solenoid valve 1 has caused a temporary valve closing failure will be described. After the solenoid valve 1 is closed, the fuel cell consumes fuel gas in the outer supply passage 14. That the pressure of the fuel gas does not become a predetermined pressure or less means that the solenoid valve 1 has temporarily failed to close, resulting in a poor seal, so that fuel gas leaks from the fuel storage tank 10 to the outer supply passage 14. It is possible.
In step S103, by giving a correction opening command to the electromagnetic valve 1, the main valve 19 of the electromagnetic valve 1 is moved in the opening direction, thereby correcting the posture of the main valve 19.

  The duration of the correction opening command is preferably as short as possible because fuel gas is wasted if it is too long, but the elastic seal member 23 fitted to the main valve 19 is cured depending on the temperature, Considering that the time until the operation changes, for example, it can be set to 1 second at a temperature below freezing point and 0.5 seconds at a temperature higher than that.

  Further, the correction opening command to the electromagnetic valve 1 executed in step S103 may be a method in which a constant voltage is continuously applied to the electromagnetic coil 31, but a voltage may be applied in a pulsed manner. When a voltage is applied to the electromagnetic coil 31 in a pulsed manner, the main valve 19 can be vibrated microscopically, so that the main valve 19 can be easily moved and separated from the main valve seat 18.

After executing the correction opening command in step S103, the process proceeds to step S104, and a closing command is given to the solenoid valve 1.
Then, it returns to step S102 and it is determined again whether the pressure in the outer side supply path 14 detected by the pressure sensor 50 is below a predetermined pressure. Thereby, it is possible to confirm whether or not the temporary valve closing failure has been canceled.
By controlling the electromagnetic valve 1 in this way, the temporary valve closing failure can be canceled, and the reliability of the electromagnetic valve 1 is improved.

  If a negative determination is made in step S102 even if the cycles of steps S102 to S104 are executed a predetermined number of times, it is determined that the solenoid valve 1 is in failure and a failure signal is output to the control device 52. The execution of the routine may be temporarily terminated.

Next, a temporary valve opening failure release control, which is a state where the electromagnetic valve has stopped in the middle of reaching the fully open position, will be described with reference to the flowchart of FIG. Note that the temporary valve opening failure release control routine in which the electromagnetic valve shown in the flowchart of FIG. 6 stops in the middle of reaching the fully open position is repeatedly executed by the control device 52.

First, in step S201, it is determined whether or not there is a command to open the solenoid valve 1.
If the determination result in step S201 is “NO” (no open command), the execution of this routine is temporarily terminated.
If the determination result in step S201 is “YES” (open command is present), the process proceeds to step S202, where the fuel cell consumption in the outer supply passage 14 detected by the pressure sensor 50 is started after the fuel cell starts to be consumed . Based on the pressure, it is determined whether or not the pressure drop (that is, the rate of pressure drop) per predetermined time (for example, about 5 seconds) of the pressure in the outer supply passage 14 is equal to or greater than a predetermined value.
If the determination result in step S202 is “NO” (less than a predetermined value), the solenoid valve 1 is normally opened, and thus the execution of this routine is temporarily terminated.
On the other hand, if the determination result in step S202 is "YES" (predetermined value or more), the valve opening failure, which is a state where the electromagnetic valve 1 has stopped in the middle of reaching the fully open position, is caused and the fuel gas is supplied to the fuel cell. It is estimated that the pressure has dropped due to the shortage , the process proceeds to step S203, and a corrective close command is given to the solenoid valve 1.

The reason for estimating whether or not the solenoid valve 1 has failed to open in the middle of reaching the fully open position will be described with reference to FIG. 7. When the solenoid valve 1 is normally opened, When the fuel gas is consumed in the fuel cell, the fuel gas is supplied from the fuel storage tank 10 to the outer supply passage 14 via the electromagnetic valve 1 by the amount of consumption, so that the pressure in the outer supply passage 14 is reduced. The decrease is only the pressure drop in the fuel storage tank 10, and therefore there is almost no change and the pressure is almost constant. On the other hand, if the solenoid valve 1 has a valve opening failure that is stopped in the middle of reaching the fully open position, the fuel gas supplied from the fuel storage tank 10 to the outer supply passage 14 via the solenoid valve 1. This is because the amount of the fuel gas cannot catch up with the amount of fuel gas consumed by the fuel cell, resulting in a shortage of fuel gas supply to the fuel cell, resulting in a large drop in pressure in the outer supply passage 14.

  In step S203, by giving a correction close command to the electromagnetic valve 1, the main valve 19 of the electromagnetic valve 1 is moved in the closing direction, thereby correcting the posture of the main valve 19.

  The duration of the corrective closing command is preferably as short as possible because it is disadvantageous for the supply of fuel gas to the fuel cell if it is too long, but the elastic seal member 23 fitted to the main valve 19 depends on the temperature. For example, it can be set to 1 second under the freezing point and 0.5 second at a temperature higher than that, taking into consideration that the time until curing and operation changes.

  Further, the correction close command to the electromagnetic valve 1 executed in step S203 may be a method of holding the state in which no voltage is applied to the electromagnetic coil 31 for the duration, but the state in which no voltage is applied to the electromagnetic coil 31 is pulsed. You may make it give. When a state in which no voltage is applied to the electromagnetic coil 31 is given in a pulsed manner, the main valve 19 can be vibrated microscopically, so that the main valve 19 can be easily moved.

After executing the correction close command in step S203, the process proceeds to step S204 to give an open command to the solenoid valve 1.
Thereafter, the process returns to step S202, and again, based on the pressure in the outer supply passage 14 detected by the pressure sensor 50, whether or not the pressure drop per predetermined time of the pressure in the outer supply passage 14 is a predetermined value or more. Determine. Thereby, it is possible to confirm whether or not the temporary valve opening failure, which is a state where the electromagnetic valve 1 has stopped in the middle of reaching the fully opened position, can be canceled.
By controlling the electromagnetic valve 1 in this way, it is possible to release a temporary valve opening failure that is in a state of stopping in the middle of reaching the fully open position, and the reliability of the electromagnetic valve 1 is improved.

  In addition, even if the cycle of steps S202 to S204 is executed a predetermined number of times, if an affirmative determination is made in step S202, it is determined that the solenoid valve 1 is in failure and a failure signal is output to the control device 52. The execution of the routine may be temporarily terminated.

[Other Examples]
The present invention is not limited to the embodiment described above.
For example, the configuration of the electromagnetic valve is not limited to that described above, and may be an electromagnetic valve that does not include a pilot valve.
The fluid stored in the tank is not limited to hydrogen gas.
Furthermore, although the embodiment in which the electromagnetic valve is directly attached to the tank is described in the above-described embodiment, the present invention is not limited to this, and the tank and the electromagnetic valve are separated from each other, and the piping flow path from the tank is used as the electromagnetic valve. Needless to say, even in the connected form, the same operation and effect as in the above-described embodiment are brought about.

It is sectional drawing of the solenoid valve used in the Example of the solenoid valve control apparatus of this invention. It is an expanded sectional view in the valve closing state of the solenoid valve of the embodiment. It is an expanded sectional view when a pilot valve opens at the time of fuel gas supply in the solenoid valve of the said Example. It is an expanded sectional view when a main valve opens in the solenoid valve of the said Example at the time of fuel gas supply. It is a flowchart of temporary valve closing defect cancellation | release control in the solenoid valve control apparatus of the said Example. It is a flowchart of the temporary valve opening defect cancellation control which is the state which the solenoid valve stopped in the middle of reaching the full open position in the solenoid valve control apparatus of the said Example. It is the figure which compared and demonstrated the pressure change of the solenoid valve valve body downstream in the case of the temporary valve opening defect which is the state which stopped in the middle to the full open position when the said solenoid valve is normal.

Explanation of symbols

1 Solenoid valve 10 Fuel storage tank (tank)
14 Outer supply passage (downstream channel)
19 Main valve
50 Pressure sensor 52 Control device (control means)

Claims (6)

A solenoid valve connected to a tank for storing fluid;
A pressure sensor for detecting the pressure in the flow path downstream of the valve body in the electromagnetic valve;
Control means for controlling the opening and closing of the electromagnetic valve according to the consumption state of the fluid ,
Said control means, after giving the close command to the solenoid valve, when the pressure detected in the previous SL pressure sensor does not become less than a predetermined pressure value, and set the duration in response to the temperature on the solenoid valve An electromagnetic valve control device that gives an opening command for correction and then gives a closing command.   2. The control unit according to claim 1, wherein after the closing command after the correction opening command, the control unit again determines whether or not a pressure detected by the pressure sensor is equal to or lower than the predetermined pressure value. The electromagnetic valve control device described.   The electromagnetic valve control device according to claim 1, wherein the correction opening command is generated as a pulse signal. A solenoid valve connected to a tank for storing fluid;
A pressure sensor for detecting the pressure in the flow path downstream of the valve body in the electromagnetic valve;
Control means for controlling the opening and closing of the electromagnetic valve according to the consumption state of the fluid ,
Wherein, after the consumption of the fluid giving an open command has been initiated in the solenoid valve, when lowering the proportion of the pressure detected in the previous SL pressure sensor is a predetermined reduction ratio above, the solenoid valve Is estimated to have caused a valve opening failure that stopped in the middle of reaching the fully open position, and a correction closing command with a duration set according to temperature is given to the solenoid valve, followed by an opening command. An electromagnetic valve control device.   The control means determines whether or not the rate of decrease in pressure detected by the pressure sensor is equal to or more than the predetermined rate after the opening command after the closing command for correction. Item 5. The electromagnetic valve control device according to Item 4.   6. The electromagnetic valve control device according to claim 4, wherein the correction close command is generated as a pulse signal.

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