JP2002081347A - High-pressure gas container fixing device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-pressure gas container fixing device for vehicle capable of detecting a pressure in a high-pressure gas container without using a pressure gauge lowering the sealability at a high-pressure part and capable of interrupting fuel gas when an abnormal acceleration is inputted without installing an exclusive acceleration sensor. SOLUTION: A plurality of variation amount detectors 7 to 10 for detecting the amount of variation of a high-pressure container in radial direction are installed between the fixing device 5 for fixing the high-pressure container to a body and the high-pressure container 1. A control controller 16 comprises a variation amount comparing part 11 for comparing the amounts of variation detected by the two variation amount detectors disposed in longitudinal direction of a vehicle across the high-pressure container 1 and detecting a difference of the variation amounts and the phase in varying direction, a pressure calculation part 12 for calculating the pressure in the high-pressure container 1 based on the difference of variation amounts and the phase detected by the variation amount comparing part 11, and an interruption control part 15 for interrupting fuel gas feeding to the vehicle by controlling a fuel shutoff valve 6 when the difference of the variation amounts by the variation amount comparing part 11 exceeds a specified value and the phase is kept unchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular high-pressure gas container fixing device for fixing a high-pressure gas container for storing a fuel gas for an internal combustion engine or a fuel gas for a fuel cell at a high pressure to a vehicle.

[0002]

2. Description of the Related Art Conventionally, in a vehicle in which a fuel gas is mounted in a high-pressure container, a mechanism is provided for shutting off gas supply from the viewpoint of preventing gas leakage when an excessive acceleration (G) such as a collision is input. For example, in a natural gas vehicle, a dedicated acceleration sensor for detecting abnormal acceleration is provided, and when acceleration equal to or higher than a predetermined value is detected, a shut-off device of a container base valve portion is operated to prevent gas leakage. Had become.

In a vehicle using high-pressure fuel gas, the remaining fuel gas in a high-pressure container to be displayed as a fuel gauge can be detected from the pressure of the container. For example, Japanese Patent Application Laid-Open No.
A technique described in Japanese Patent No. 94373 is known.

FIG. 13 is a diagram showing an example of pressure measurement of a conventional high-pressure gas container. In the figure, a pressure sensor 105 is provided at a branch portion of high pressure pipes 103 and 104 extending from a container base valve 102 of a high pressure container 101.

FIG. 14 is a graph showing the relationship between the pressure of the high-pressure container and the amount of strain in the radial direction. Nominal filling pressure 35
In the high-pressure container of MPa, the pressure is approximately linear up to a pressure of about 20 MPa, but when the pressure exceeds about 20 MPa, the strain tends to increase sharply.

[0006]

However, the conventional pressure gauge for a high-pressure vessel has a structure in which the pressure gauge is directly inserted into the high-pressure portion, so that the number of sealing locations for preventing gas leakage in the high-pressure system increases. There was a point.

In a vehicle equipped with a conventional fuel high-pressure container, a dedicated acceleration sensor is provided to prevent gas leakage by activating a shutoff device of a container valve section when abnormal acceleration is applied to the vehicle body. There was a problem that needed.

In view of the above problems, it is an object of the present invention to provide a high-pressure gas container for a vehicle which can detect the pressure of the high-pressure gas container without using a pressure gauge for reducing the sealing performance of the high-pressure portion. It is to provide a fixing device.

Another object of the present invention is to provide a vehicular high-pressure gas container fixing device capable of detecting the input of abnormal acceleration and shutting off fuel gas without providing a dedicated acceleration sensor.

[0010]

According to the present invention, there is provided a high-pressure gas container fixing apparatus for a vehicle for mounting a container filled with fuel gas at a high pressure on a vehicle. A fuel shut-off device provided at a base valve portion of the container, a fixing device for fixing the container to a vehicle body, and a plurality of devices provided between the fixing device and the container to detect a radial change amount of the container. And a change amount for detecting a difference between the change amounts and a phase of the change direction by comparing the change amounts detected by the two change amount detectors disposed in the front-rear direction of the vehicle with the container interposed therebetween. Comparison means, pressure calculation means for calculating the pressure of the container based on the difference and phase of the change amount detected by the change amount comparison means, the difference of the change amount by the change amount comparison means is a predetermined value or more, and When the phase is the same phase, And controls the charge blocking device and summarized in that with a cutoff control means for shutting off the fuel gas supplied to the vehicle, a.

According to a second aspect of the present invention, there is provided an apparatus for fixing a high-pressure gas container for a vehicle according to the first aspect, wherein the fuel gas is any one of hydrogen gas, natural gas, and petroleum gas. The gist is that there is.

According to a third aspect of the present invention, in order to solve the above-mentioned problem, in the high-pressure gas container fixing device for a vehicle according to the first or second aspect, the detection result of the change amount comparing means is in an opposite phase. In this case, the gist is that the pressure calculating means calculates the pressure of the container.

According to a fourth aspect of the present invention, in order to solve the above-mentioned problem, in the high-pressure gas container fixing device for a vehicle according to the first or second aspect, the detection results of the change amount comparing means are in phase. When the difference between the change amounts is equal to or less than a predetermined amount, the gist is that the pressure calculation unit calculates the pressure of the container by correcting the phase influence based on the detection result of the change amount comparison unit. .

According to a fifth aspect of the present invention, in order to solve the above-mentioned problem, the high-pressure gas container fixing device for a vehicle according to the fourth aspect further includes a temperature detecting means for detecting a temperature of the container. If the detection result of the comparison means is in phase but the difference between the amounts of change is equal to or less than a predetermined amount, the pressure calculation means performs phase influence based on the detection result of the change amount comparison means and the detection result of the temperature detection means. The gist is that the pressure of the container is calculated by performing the correction of the temperature and the temperature correction.

According to a sixth aspect of the present invention, there is provided a high-pressure gas container fixing apparatus for a vehicle according to any one of the first to fifth aspects of the present invention, which is arranged in a lateral direction of the vehicle. A second change amount comparison means for detecting a phase in a change direction of the change amount detected by the two change amount detectors, wherein the shut-off control is performed when the phases by the second change amount comparison means are opposite phases; The gist is that the means controls the fuel cutoff device to cut off the fuel gas supplied to the vehicle.

[0016]

According to the first aspect of the present invention, in a vehicular high-pressure gas container fixing device for mounting a container filled with fuel gas at a high pressure on a vehicle, a fuel provided at a base valve portion of the container is provided. A blocking device, a fixing device for fixing the container to the vehicle body, a plurality of change amount detectors provided between the fixing device and the container, and detecting a change amount in a radial direction of the container; A change amount comparison means for comparing the change amounts detected by the two change amount detectors arranged in the front-rear direction and detecting a difference between the change amounts and a phase in the change direction; and a change amount detection means for detecting the change amount detected by the change amount comparison means. A pressure calculating means for calculating the pressure of the container based on the difference and the phase; and, when the difference between the change amounts by the change amount comparing means is equal to or more than a predetermined value and the phases are the same, the fuel cutoff device is controlled to control the vehicle. Shutoff control means for shutting off supplied fuel gas, With this arrangement, the pressure of the high-pressure gas container can be detected without providing a pressure gauge in the high-pressure section, and the difference in the amount of change detected by the two displacement gauges disposed in the front-rear direction of the vehicle. Is greater than or equal to a predetermined value, and when they are in phase, it can be determined that an abnormal acceleration has been applied, so without providing a dedicated accelerometer,
The fuel cutoff device cuts off the fuel gas, thereby preventing fuel gas leakage.

According to the present invention, the fuel gas is selected from the group consisting of hydrogen gas, natural gas, and petroleum gas.
NG) In an engine vehicle, an oil-gas engine vehicle, and a hydrogen fuel cell vehicle, the effects of the invention described in claim 1 can be obtained.

According to the present invention as set forth in claim 3, according to claim 1,
Alternatively, in addition to the effect of the invention described in claim 2, when the detection result of the change amount comparing means is in the opposite phase, the pressure calculating means calculates the pressure of the container, so that an advanced gas leak preventing is realized. It is possible to detect the pressure of the fuel gas in the high-pressure container without providing a high-pressure gas system with a pressure gauge that requires sealing performance.

According to the present invention as set forth in claim 4, claim 1 is provided.
Alternatively, in addition to the effect of the invention described in claim 2, when the detection results of the change amount comparing means are in phase but the difference between the change amounts is equal to or less than a predetermined amount, based on the detection result of the change amount comparing means,
Since the pressure calculating means calculates the pressure of the container by correcting the influence of the phase, there is an effect that a more accurate pressure can be calculated.

According to the present invention described in claim 5, according to claim 4,
In addition to the effects of the described invention, the apparatus further comprises a temperature detecting means for detecting the temperature of the container, and when the detection result of the change amount comparing means has the same phase but the difference between the change amounts is equal to or less than a predetermined amount, the change amount comparison Based on the detection result of the means and the detection result of the temperature detecting means, the pressure calculating means calculates the pressure of the container by correcting the phase influence and the temperature, so that accurate pressure can be obtained even in a wide range of operating temperature environment. The remaining high pressure gas can be calculated.

According to the present invention described in claim 6, according to claim 1,
In addition to the effect of the invention according to claim 5, a second change amount comparing means for detecting a phase in a change direction of the change amount detected by the two change amount detectors arranged in the left-right direction of the vehicle is further provided. When the phase of the second change amount comparing means is the opposite phase, the cutoff control means controls the fuel cutoff device to cut off the fuel gas supplied to the vehicle. There is an effect that the fuel gas can be reliably shut off even when excessive acceleration is input in the lateral direction.

[0022]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a system configuration diagram showing the configuration of an embodiment of the vehicular high-pressure gas container fixing device according to the present invention. In this embodiment, as shown in FIG. 3, a fuel cell unit F is mounted under the floor of a passenger car V, and a high-pressure container 1 is placed horizontally in a trunk room as a fuel supply system H for supplying hydrogen to the fuel cell unit F. An example is shown in which the fixing device 5 is used for fixing.

In FIG. 1, the system includes a fuel cell unit F, a fuel supply system H for supplying high-pressure hydrogen gas,
The fuel cell system includes a controller 16, a fuel pressure gauge 17 driven by the controller 16, and a pressure reducing valve 18 for reducing the pressure of the high-pressure hydrogen gas in the fuel supply system H and supplying the reduced pressure to the fuel cell unit F.

The fuel supply system H includes a substantially cylindrical high-pressure vessel 1 filled with hydrogen gas at a high pressure, a vessel base valve 2, a filling port 3 communicating with the vessel base valve 2, and hydrogen from the vessel base valve 2. A hydrogen pipe 4 for guiding the gas to a pressure reducing valve 18, two fixing devices 5 surrounding the high-pressure vessel 1 in a ring shape and fixing the high-pressure vessel 1 to a vehicle body, and a fuel gas provided in the vessel main valve 2 for emergency use. A fuel shutoff valve 6 as a fuel shutoff device for shutting off;
The high pressure vessel 1 is provided between the high pressure vessel 1 and the fixing device 5.
Change amount detectors 7-1 for detecting the amount of change in the radial direction of
0, temperature sensor 1 as temperature detecting means of high pressure vessel 1
3 is provided.

As the temperature sensor 13, for example, a semiconductor temperature sensor such as a thermistor can be used. Four change amount detectors 7
Reference numerals 10 to 10 respectively denote a change amount detector 7 in the right front (FR) of the vehicle and a left front (F
L), a change amount detector 9 is provided on the right side (RR) behind the vehicle, and a change amount detector 10 is provided on the left side (RL) behind the vehicle. As the change amount detectors 7 to 10, for example, a strain gauge, a semiconductor pressure sensor, or the like can be used.

In the following description, the change amount detectors 7 to 1 will be described.
The detection results of “0” are DrFR, DrFL, and DrR, respectively.
R and DrRL, and these four detection results are collectively called Dr.

The controller 16 includes the change amount detector 7
A change amount comparing unit 11 for comparing the change amount and phase of
A temperature calculating unit 14 that calculates the temperature of the high-pressure vessel 1 based on the detection value of the temperature sensor 13, and a difference and a phase of the change amount from the change amount comparing unit 11 and a temperature based on the temperature from the temperature calculating unit 14. Pressure calculation unit 12 for calculating the pressure of high-pressure vessel 1
And a shutoff control unit 15 that determines that an abnormal acceleration (G) has been input to the vehicle body based on the difference and phase of the change amount from the change amount comparison unit 11 and sends a shutoff signal to the fuel shutoff valve 6. ing.

FIG. 2 is a block diagram showing more detailed blocks of the controller 16. The control controller 16 converts the analog signals from the change amount detectors 7 to 10 and the temperature sensor 13 into analog signals and outputs the analog signals to the change amount comparison unit 11 and the temperature calculation unit 14; A comparison unit 11, a temperature calculation unit 14, a pressure calculation unit 12 including a change-pressure conversion map 21 and a temperature-hydrogen correction map 22 therein, and a shutoff control unit 15 are provided. The change amount comparison unit 11, the temperature calculation unit 14, and the cutoff control unit 15 are the same components as those described with reference to FIG.

The controller 16 controls the temperature of the temperature calculator 14, the pressure of the pressure calculator 12, the change amount comparison and the phase comparison of the change amount comparison unit 11 by software control using a microprocessor, although not particularly limited thereto.
The control of the fuel cutoff valve 6 is performed by the cutoff control unit 15.

Next, the operation of this embodiment will be described for each running condition of the vehicle. First, consider a case where an excessive G occurs in the front-rear direction of the vehicle as shown in FIG. Change detector 7
The change amount comparison unit 11 detects the difference and the phase of the change amount of the detection result between the change amount detectors 7 and 9 and the change amount detectors 8 and 10, which are a set of the change amount detectors arranged before and after. This result is in-phase and the difference of the front-back change amount DrdL (Dr
Consider the case where FR-DrRR and DrFL-DrRL are larger than a predetermined amount.

The fact that the front and rear phase changes are in phase means that it is determined that there is a front and rear vibration input as shown in FIG. 7 (a). For this reason, if the difference DrdL in the radial change amount of the high-pressure container 1 is larger than the change amount difference DrdL0 assumed from normal fuel consumption, the vibration input to the vehicle is determined to be abnormal, and is assumed to be excessive G. Is done.

Therefore, a shut-off signal is sent from the shut-off control unit 15 of the controller 16 to the fuel shut-off valve 6 to shut off the supply of hydrogen, thereby preventing leakage of the high-pressure hydrogen system due to abnormal G input.

Next, as shown in FIG. 8, consider the case of normal running, that is, acceleration / deceleration in a normal range. Change detector 7
The change amount comparison unit 11 detects the difference and the phase of the change amount of the detection result between the change amount detectors 7 and 9 and the change amount detectors 8 and 10, which are a set of the change amount detectors arranged before and after. This result is in-phase and the difference of the front-back change amount DrdL (Dr
The larger of FR-DrRR and DrFL-DrRL) is equal to or less than a predetermined amount.

When the front and rear phase changes are in phase, it is determined that there is a vibration input in the front and rear direction of the vehicle as shown in FIG. At this time, if the change amount DrdL in the radial direction of the high-pressure container 1 is smaller than the change amount DrdL0 assumed from normal fuel consumption, it is determined that the vibration input to the vehicle is not abnormal.

Therefore, the radial change amount D of the high-pressure vessel 1
With respect to r (DrFR, DrFL, DrRR, DrRL), the correlation between the pressure subjected to the phase effect correction and the amount of change in the diameter of the high-pressure vessel is obtained by the pressure calculation unit 12 and is controlled as a pressure value of the high-pressure hydrogen system. And display of the fuel pressure gauge 17.

Next, as shown in FIG. 9, the time of stopping and the time of running at a constant speed (when there is no acceleration / deceleration) are considered. Change detector 7 ~
The change amount comparison unit 11 detects the difference and the phase of the change amounts of the detection results of the change amount detectors 7 and 9 and 8 and 10 which are a set of the change amount detectors arranged before and after out of 10. Consider the case where the result is out of phase.

The fact that the amount of phase change between the front and the rear is opposite is determined as shown in FIG. 9A, that there is no vibration input in the front-rear direction of the vehicle. Therefore, the amount of change Dr (DrFR, DrFL, DrRR, Dr
From RL), the correlation between the pressure and the amount of change in the diameter of the high-pressure vessel is determined by the pressure calculation unit 12 and used as a pressure value of the high-pressure hydrogen system for controlling the system and displaying the fuel pressure gauge 17.

Next, the effect of a temperature change will be considered.
In the above example, the temperature of the container, that is, the environmental temperature is, for example, 25 ° C.
However, since the fuel filled in the high-pressure container 1 is a gas, the influence of the temperature cannot be ignored when the container temperature is greatly deviated from the normal temperature. Therefore, when calculating the pressure or the residual gas amount in the high-pressure vessel 1, the temperature value of the high-pressure vessel 1 calculated by the temperature calculation unit 14 from the detection result of the temperature sensor 13 and the temperature provided in the pressure calculation unit 12 -Temperature correction is applied to the residual hydrogen gas amount with reference to the hydrogen amount correction map 22.

Next, consider the case where the vehicle has an excessive lateral G (when the vehicle is subjected to an excessive lateral input G). Change amount detector 7-1
The difference amount and phase of the change amounts of the detection results of the change amount detectors 7 and 8 and 9 and 10 which are a set of change amount detectors arranged on the left and right of 0 are detected by the change amount comparison unit 11. This result is in the opposite phase and the difference between left and right changes DrdW (DrFR
(The larger of -DrFL and DrRR-DrRL) is equal to or greater than the normal value change amount DrdW0.

When the left and right phase changes are in opposite phases, it is determined that there is a left and right vibration input as shown in FIG. For this reason, when the difference DrdW of the radial change amount of the high-pressure container 1 is larger than the normal value change amount difference DrdW0, the left-right vibration input to the vehicle is determined to be abnormal, and is assumed to be excessive G.

For this reason, a shut-off signal is sent from the shut-off control unit 15 of the controller 16 to the fuel shut-off valve 6 to shut off the hydrogen supply, thereby preventing leakage of the high-pressure hydrogen system due to abnormal G input.

FIGS. 4 to 6 show control flowcharts for controlling the fuel cutoff valve 6 and calculating the fuel gas pressure in accordance with the above-mentioned respective driving situations.

First, the change amounts Dr (DrFR, DrFL, DFL) in the radial direction of the high-pressure vessel 1 are detected by the change amount detectors 7 to 10.
rRR, DrRL) are detected and read into the controller 16 (step 10, hereinafter step is abbreviated as S).

Next, the difference D in the longitudinal direction between the amount of change and the phase
rdL = max (DrFR-DrRR, DrFL-Dr
RL) is calculated (S12), and the difference between the amount of change and the phase in the left-right direction DrdW = max (DrFR-DrFL, DrRR)
-DrRL) is calculated (S14), and a detection value is input from the temperature sensor (S16).

Next, it is determined whether or not the phases in the front-rear direction are the same (S18). If the front and rear phases are not the same, it is determined whether the left and right phases are the opposite phases as the front and rear reverse phases (S20). If not, the temperature correction map is read, and the environmental temperature detected by the temperature sensor is detected from the temperature correction map. A temperature correction coefficient is obtained (S22), a fuel gas pressure value whose temperature has been corrected to room temperature from the variation is calculated (S24), and the process is terminated.

If it is determined in S18 that the phase is the same, the estimated change amount DrdL0 is read (S30), and it is determined whether the phase input DrdL is greater than the assumed change value DrdL0 (S32). If the phase input is larger than the assumed change amount, it is determined that the G before and after the input is excessive (S3).
4) Supply hydrogen is cut off by the fuel cutoff valve (S36),
The power generation system of the fuel cell is stopped (S38), and the process ends.

If it is determined in step S32 that the phase input is not larger than the assumed change amount, the process branches to step S20.

If the left and right phases are determined to be opposite in S20, the assumed change amount DrdW0 is read (S40), and it is determined whether or not the phase input DrdW is greater than the assumed change value DrdW0 (S42). If the phase input is larger than the assumed change amount, it is determined that the excessive lateral G has been input (S4).
4) Supply hydrogen is cut off by the fuel cutoff valve (S46),
The power generation system of the fuel cell is stopped (S48), and the process ends.

If it is determined in step S42 that the phase input is not larger than the assumed change amount, the process branches to step S22.

In this way, when an excessive G before or after or an excessive lateral G is input, the fuel cutoff valve is operated to shut off the supply of hydrogen, and when G or G is normally 0 (stop, constant speed running), The residual gas pressure in the high-pressure vessel can be calculated in terms of normal temperature.

FIG. 12 is a plan view (a) of a main part and a side view (b) of a main part showing a second embodiment in which the high-pressure vessel 1 is arranged vertically on a vehicle.

In FIG. 12A, a substantially cylindrical high-pressure vessel 1 is placed vertically so that its axial direction coincides with the front-rear direction of the vehicle. This mounting method is effective when mounting a high-pressure gas container under the floor of a vehicle or on a roof of a truck, a bus, or the like.

[0053] Fixing devices 5a and 5b for fixing the high-pressure vessel 1 to the vehicle are provided at the front and rear of the high-pressure vessel 1. A change amount detector 30 is provided between the high-pressure vessel 1 and the fixing device 5a, and a change amount detector 31 is provided between the high-pressure container 1 and the fixing device 5b. As in the first embodiment, a strain gauge or a pressure sensor can be used for the change amount detectors 30 and 31. In the present embodiment, the control controller 16 of the first embodiment is used.
By connecting the same controller as that described above, the acceleration applied to the vehicle and the pressure of the high-pressure vessel 1 can be obtained based on the amount of change in the length direction of the high-pressure vessel 1.

The embodiments described above are described to facilitate the understanding of the present invention, and do not limit the present invention. Therefore, each component and each operation disclosed in the above-described embodiment is intended to include all design choices belonging to the technical scope of the present invention.

For example, in the first embodiment, the difference DrdL of the amount of change in the radial direction of the high-pressure vessel is calculated as DrFR-DrRR and DDR.
The larger of rFL-DrRL (the front-back difference on the right side of the vehicle and the front-back difference on the left side of the vehicle) is the larger one of DrFR-DrRL and DrFL-DrRR (the difference between the right and left of the vehicle and the cross at the front and rear). Can be. The same is true even when the arithmetic mean is used without using the one with the larger difference.

Similarly, in the first embodiment, the difference DrdW of the amount of change in the left-right direction is calculated as DrFR-DrFL and DrRR-Dr.
Although DrRL was set to be larger, it is the same even when arithmetic mean is used.

In the first embodiment, four change amount detectors are used. However, if a plurality of change amount detectors are used,
The acceleration (G) and the pressure of the high-pressure container can be detected based on the difference between the change amounts using the change amount detectors of 2, 3, 6, and the like.

Further, in the embodiment, the high-pressure hydrogen container for a fuel cell vehicle has been described. However, it is obvious that the present invention can be applied to other high-pressure containers for fuel gas such as natural gas.

[Brief description of the drawings]

FIG. 1A is a system configuration diagram showing a configuration of an embodiment of a vehicular high-pressure gas container fixing device according to the present invention, and FIG.
FIG. 3 is a sectional view taken along line A ′.

FIG. 2 is a block diagram illustrating a configuration of a control system according to the embodiment.

FIG. 3 is a side view showing a high-pressure container mounted on a direct hydrogen fuel cell vehicle.

FIG. 4 is a flowchart (1) for explaining the operation of the embodiment;

FIG. 5 is a flowchart (2) for explaining the operation of the embodiment;

FIG. 6 is a flowchart (part 3) for explaining the operation of the embodiment;

FIG. 7A is a plan view of a main part for explaining an operation when an excessive vehicle G occurs, and FIG. 7B is a graph showing a front-back phase change amount difference.

8A is a main part plan view for explaining an operation during normal running of the vehicle, FIG. 8B is a graph showing a front-back phase change amount difference, and FIG.

FIG. 9A is a plan view of a main part for explaining an operation when the vehicle is stopped, and FIG. 9B is a graph showing a front-back phase change amount difference, and FIG.

FIG. 10 is a graph showing a temperature correction coefficient with respect to a container temperature.

11A is a plan view of a main part for explaining an operation when the vehicle has an excessively large lateral G, and FIG. 11B is a graph showing a front-back phase change amount difference.

12A is a plan view showing an example of a detector arrangement according to the second embodiment in which a high-pressure vessel is placed vertically, and FIG. 12B is a side view of the same.

FIG. 13 is a view showing a pressure measurement example of a conventional high-pressure vessel.

FIG. 14 is a graph showing the relationship between the pressure of the high-pressure vessel and the amount of strain in the radial direction.

[Explanation of symbols]

 F Fuel cell unit H Fuel supply system 1 High pressure vessel 2 Container base valve 3 Filling port 4 Hydrogen pipe 5 Fixing device 6 Fuel cutoff valve 7-10 Change amount detector 11 Change amount comparison unit 12 Pressure calculation unit 13 Temperature sensor 14 Temperature calculation Unit 15 Shut-off control unit 16 Control controller 17 Fuel pressure gauge 18 Pressure reducing valve

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F17C 13/04 301 B60K 15/08

Claims (6)

[Claims] 1. A high-pressure gas container fixing device for a vehicle for mounting a container filled with fuel gas at a high pressure on a vehicle, comprising: a fuel cut-off device provided at a main valve portion of the container; and the container fixed to a vehicle body. A fixing device that is provided between the fixing device and the container, and a plurality of change amount detectors that detect a change amount in a radial direction of the container; and A change amount comparing unit that compares the change amounts detected by the two change amount detectors and detects a difference between the change amounts and a phase in a change direction; and a change amount comparing unit based on the difference amount and the phase detected by the change amount comparing unit. Pressure calculating means for calculating the pressure of the container by means of the control means, and when the difference between the change amounts by the change amount comparing means is equal to or more than a predetermined value and the phase is the same, the fuel cutoff device is controlled and supplied to the vehicle. Shut-off system that shuts off fuel gas A high-pressure gas container fixing device for a vehicle, comprising: 2. The fuel gas includes hydrogen gas, natural gas,
The high-pressure gas container fixing device for a vehicle according to claim 1, wherein the fixing device is any one of oil and gas. 3. The high pressure for a vehicle according to claim 1, wherein the pressure calculating means calculates the pressure of the container when the detection result of the change amount comparing means has an opposite phase. Gas container fixing device. 4. When the detection result of the change amount comparison means is in phase but the difference between the change amounts is equal to or less than a predetermined amount, the pressure calculation means determines the phase based on the detection result of the change amount comparison means. 3. The high-pressure gas container fixing device for a vehicle according to claim 1, wherein the pressure of the container is calculated by correcting the influence. 5. The apparatus according to claim 1, further comprising a temperature detecting means for detecting a temperature of the container, wherein the change amount comparing means is provided when the detection result of the change amount comparing means is in phase but the difference between the change amounts is equal to or less than a predetermined amount. 5. The high pressure for a vehicle according to claim 4, wherein the pressure calculating means calculates the pressure of the container by correcting the phase influence and the temperature based on the detection result of the temperature detecting means and the detection result of the temperature detecting means. Gas container fixing device. 6. A second change amount comparison means for detecting a phase in a change direction of a change amount detected by the two change amount detectors arranged in the left-right direction of the vehicle, wherein the second change amount comparison means is provided. 6. The fuel supply system according to claim 1, wherein the shut-off control unit controls the fuel cut-off device to cut off fuel gas supplied to the vehicle when the phase by the means is reversed. High pressure gas container fixing device for vehicles.