JP2006141122A - Fuel supplying apparatus, control method of fuel supplying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a failure in a fuel battery due to an abnormality of a depressurizing valve by accurately diagnosing the degree of an abnormal state of a depressurizing device for a hydrogen gas supplied from a container to the fuel battery. <P>SOLUTION: A vehicle driving system is supplied with and consumes the hydrogen gas filled from the outside while a vehicle stops, and generates a running torque for the vehicle. A control method includes a step S1 for detecting a start for filling the container with the hydrogen gas from the outside while the vehicle stops, a step S3 for depressurizing the hydrogen gas stored in the container, detecting a gas pressure upstream of the depressurizing valve for supplying the hydrogen gas to the vehicle driving system and also detecting the gas pressure downstream of the gas depressurizing valve, steps S4, S5, S6, S9 for diagnosing a state of the gas depressurizing valve based on the gas pressures upstream and downstream of the gas depressurizing valve, and steps S7, S10, S11 for determining a running mode of the vehicle based on a diagnostic result. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fuel supply device that supplies fuel to a fuel cell and the like, and a control method for the fuel supply device by supplying fuel from an external fuel stand and decompressing the fuel filled in a container in a high pressure state.

  Conventionally, as a gas fuel supply device provided with a fuel piping system for supplying a fuel gas to an internal combustion engine or a fuel cell using high pressure gas as a fuel, such as that described in Patent Document 1 below, Are known.

  The gas fuel supply device described in Patent Document 1 supplies high-pressure gas fuel to a fuel cell or the like via a pressure reducer, and includes shut-off valves upstream and downstream of the pressure reducer. When the pressure on the downstream side of the decompressor exceeds a predetermined pressure, it is detected as a malfunction of the decompressor, and the shutoff valves upstream and downstream of the decompressor are simultaneously shut off. As a result, in this gas fuel supply device, the operation of the fuel cell can be stopped without causing a problem to the fuel cell or the like downstream of the decompressor.

When restarting the fuel cell or the like, when the shut-off valve downstream of the decompressor is opened first and fuel gas supply to the fuel cell is started, and it can be confirmed that the pressure downstream of the decompressor is less than the predetermined pressure Then, open the shutoff valve upstream of the pressure reducer. As a result, when the malfunction of the decompressor is resolved, the operation of the fuel cell can be resumed.
JP 2004-1000058 A

  However, in the conventional technique including the technique described in Patent Document 1 described above, a stationary fuel stand and a vehicle equipped with a fuel cell are connected to fill the fuel tank of the fuel cell vehicle with fuel. Sometimes, for example, when foreign matter is caught between the fuel stand and the fuel cell vehicle and foreign matter enters the fuel flow path of the fuel cell vehicle, the pressure reducing valve does not function and the pressure is not reduced. There is a possibility that the fuel gas is supplied to the fuel cell side. Therefore, in order to avoid introducing the fuel gas into the fuel cell at a high pressure, there is a problem that the fuel gas has to be discharged to the outside air from the upstream side of the fuel cell.

  On the other hand, a technique for diagnosing whether or not the pressure reducing valve functions has been proposed. However, if the diagnosis process is performed at the time of starting the vehicle to start running, the start-up time becomes longer by the time required for the diagnosis process. There was a problem.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and by accurately diagnosing the degree of the abnormal state of the pressure reducer, the vehicle drive system such as the fuel cell system is defective due to the abnormality of the pressure reducing valve. It is an object of the present invention to provide a fuel supply apparatus and a control method for the fuel supply apparatus that can prevent this.

  The present invention relates to a fuel supply device that supplies fuel to a vehicle drive system that is filled with fuel from the outside when the vehicle is stopped and consumes the fuel to generate a running torque of the vehicle. Gas pressure on the gas upstream side of a pressure reducing valve that detects the start of fuel filling from the outside in a stopped state, depressurizes the fuel stored in the container, and supplies fuel gas to the vehicle drive system And the gas pressure on the gas downstream side of the pressure reducing valve is detected. Then, the state of the pressure reducing valve is diagnosed from the gas pressure upstream of the pressure reducing valve and the gas pressure downstream of the pressure reducing valve, and the traveling mode of the vehicle is determined based on the diagnosis result. By doing so, the above-mentioned problems are solved.

  According to the present invention, when the fuel is charged into the container from the outside, the degree of abnormality of the pressure reducing valve that supplies fuel gas in a state where pressure is reduced from the container to the vehicle drive system is diagnosed. Since the optimum travel mode of the vehicle is determined by the degree diagnosis, it is possible to prevent a malfunction from occurring when the vehicle drive system starts operating due to an abnormality of the pressure reducing valve.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The present invention is applied to, for example, a fuel supply system that is mounted on a fuel cell vehicle that travels using power generated by a fuel cell and supplies hydrogen gas, which is a fuel gas, to a fuel cell system (vehicle drive system).

[Configuration of fuel supply system]
In this fuel supply system, as shown in FIG. 1, for example, filling pipes L1 and L2 are provided as pipes for filling the high-pressure fuel container 6 with hydrogen. In this fuel supply system, the shutoff valve 4 is connected to the filling pipe L1 connected to the filling port 2 exposed from the outside of the vehicle when the filling port door 1 is opened. A tank-in type check valve 7 and a high-pressure fuel container 6 are connected to the shut-off valve 4 via a filling pipe L2.

  In this fuel supply system, the filling port door 1 provided on the vehicle body of the fuel cell vehicle is opened, and the filling port 2 is connected via a stationary fuel stand and piping. The hydrogen to be charged is charged into the high-pressure fuel container 6 in a high-pressure state via the filling port 2, the shut-off valve 4, and the check valve 7. Here, it is detected by the lid switch 3 that the filling port door 1 is in the open state or the closed state, and is notified to the control device 20 as an electrical signal.

  The high pressure fuel container 6 is a container for storing hydrogen supplied from a fuel stand. The high-pressure fuel container 6 is integrally provided with a check valve 7 provided at the hydrogen inlet portion and an upstream cutoff valve 8 provided at the hydrogen outlet portion for supplying and shutting off hydrogen.

  The shutoff valve 4 is provided to shut off or open the hydrogen flow between the filling port 2 and the high pressure fuel container 6. This shut-off valve 4 is opened and closed by the actuator 5 in accordance with a control signal from the control device 20 to start and stop hydrogen filling from the filling port 2 to the high-pressure fuel container 6.

  The check valve 7 has a valve structure that restricts the hydrogen that has passed through the shutoff valve 4 from the filling port 2 to flow in only one direction of the high-pressure fuel container 6. The check valve 7 prevents high-pressure hydrogen from flowing back from the high-pressure fuel container 6 to the filling port 2 side.

  The hydrogen filled in the high-pressure fuel container 6 is supplied to the fuel via the in-tank upstream cutoff valve 8, the supply pipe L3, the pressure reducing valve 10, the supply pipe L4, the downstream cutoff valve 11, and the supply pipe L5. It is supplied to a fuel cell system for generating power from the battery. A fuel cell stack is connected downstream of the supply pipe L5 via a pressure control valve (not shown). The hydrogen gas that has passed through the supply pipe L5 is pressure-adjusted by a pressure adjustment valve and supplied to a fuel cell system including a fuel cell stack as a fuel supply destination.

  In this fuel supply system, an upstream side cutoff valve 8 is provided upstream of the pressure reducing valve 10, and a downstream side cutoff valve 11 is provided downstream of the pressure reducing valve 10. The upstream shut-off valve 8 is opened and closed by an actuator 9 in accordance with a control signal from the control device 20. Further, the downstream shut-off valve 11 is opened / closed by the actuator 12 in accordance with a control signal from the control device 20. When both the upstream side shut-off valve 8 and the downstream side shut-off valve 11 are opened, the hydrogen gas in the high-pressure fuel container 6 passes through the upstream side shut-off valve 8 and is depressurized by the pressure-reducing valve 10, and the downstream side It passes through the shut-off valve 11 and is supplied to the fuel cell stack.

  Further, in this fuel supply system, a hydrogen gas discharge valve 13 is provided in a supply pipe L5 connecting the downstream cutoff valve 11 and the fuel cell stack. The discharge valve 13 supplies hydrogen gas to the fuel cell stack at the gas pressure when the gas pressure detected by a supply pressure sensor 16 described later becomes abnormally higher than a specified value. It is an emergency valve to prevent. The discharge valve 13 discharges part of the hydrogen gas sent from the high-pressure fuel container 6 side, thereby supplying the hydrogen gas to the fuel cell stack side at a gas pressure equal to or lower than the pressure resistance of the fuel cell stack. In this example, the case where the fuel cell stack is provided downstream of the discharge valve 13 has been described. However, the present invention is not limited to this, and the discharge valve 13 has a hydrogen pressure so as to be equal to or lower than the pressure resistance of the device downstream of the discharge valve 13. It is a valve that discharges.

  Further, this fuel supply system is configured such that the gas pressure in the fuel supply pipe L3 connecting the upstream side shut-off valve 8 and the pressure reducing valve 10, that is, the gas on the upstream (inlet) side of the pressure reducing valve 10 which is the pressure in the high pressure fuel container 6. An upstream pressure sensor 14 that detects pressure and a gas pressure in the fuel supply pipe L4 that connects the pressure reducing valve 10 and the downstream shutoff valve 11, that is, a downstream pressure that detects a gas pressure downstream (outlet) of the pressure reducing valve 10. Gas pressure in the side pressure sensor 15 and the supply pipe L5, that is, the gas pressure supplied to the fuel cell stack side when the downstream cutoff valve 11 is in the open state downstream of the downstream cutoff valve 11 And a supply pressure sensor 16 for detecting. The detection values of the upstream pressure sensor 14, the downstream pressure sensor 15, and the supply pressure sensor 16 are read by the control device 20.

  The control device 20 performs failure diagnosis processing for the pressure reducing valve 10 and performs travel mode control processing for controlling the travel mode of the fuel cell vehicle based on the diagnosis result of the failure diagnosis processing. The control device 20 includes a fuel cell system for generating a running torque of the fuel cell vehicle, a vehicle control device 31 for controlling a battery, an inverter, and a drive motor, and a display device 32 for presenting various information to the driver. Connected. Then, the control device 20 outputs the results of the failure diagnosis process and the travel mode control process to the vehicle control device 31 and the display device 32, thereby generating a travel torque in the determined travel mode and displaying the travel torque on the display device 32. . Details of the failure diagnosis process and the travel mode control process will be described later.

[Operation of fuel supply system]
Next, as the operation of the fuel supply system configured as described above, the processing procedure of the failure diagnosis process and the travel mode control process will be described with reference to the flowchart of FIG.

  In this fuel supply system, first, when the lid switch 3 detects that the filling port door 1 is opened (step S1), the control device 20 is activated (step S2).

  Then, the control device 20 controls the actuator 5 so as to open the shut-off valve 4, thereby opening the gas flow path between the fuel stand and the fill port 2. , And the check valve 7, it is recognized that the high-pressure fuel container 6 is filled with hydrogen.

  Next, the control device 20 inputs the detection value of the upstream pressure sensor 14 and the detection value of the downstream pressure sensor 15 (step S3), and starts an abnormality diagnosis process for the pressure reducing valve 10 (step S4). At this time, the control device 20 holds the upstream shut-off valve 8 and the downstream shut-off valve 11 in the closed state before inputting the detection values of the upstream pressure sensor 14 and the downstream pressure sensor 15. The valve 8 is controlled to be opened, and hydrogen gas is introduced from the high pressure fuel container 6 to the pressure reducing valve 10. Then, the control device 20 inputs the detection values of the upstream pressure sensor 14 and the downstream pressure sensor 15 when hydrogen gas is introduced from the high pressure fuel container 6 to the pressure reducing valve 10.

  Next, the control device 20 reads out the pressure characteristic data stored in advance in the storage device 21 as shown in FIG. 3, and this pressure characteristic data and the detected value of the upstream pressure sensor 14 input in step S3. And the state of the pressure reducing valve 10 is determined using the detection value of the downstream pressure sensor 15. Here, as shown in FIG. 3, the pressure characteristic data obtains the degree of the abnormal state of the pressure reducing valve 10 from the relationship between the upstream gas pressure P1 of the pressure reducing valve 10 and the downstream pressure P2 of the pressure reducing valve 10. It is possible data.

  This pressure characteristic data is a characteristic in which the downstream pressure P2 increases as the upstream gas pressure P1 of the pressure reducing valve 10 increases, and the downstream pressure P2 corresponding to the upstream gas pressure P1 corresponds to the normal region A. This is data for determining that the pressure reducing valve 10 is operating normally.

  In other words, this pressure characteristic data indicates that the downstream pressure P2 relative to the upstream gas pressure P1 is within the range of the upstream gas pressure P1 in which the pressure reducing valve 10 operates normally and is introduced from the high pressure fuel container 6 to the pressure reducing valve 10. A reference decompression line consisting of a reference value is set. This reference pressure reducing line is designed at the time of manufacture in which the pressure reducing capacity of the pressure reducing valve 10 is not deteriorated. The allowable range of the downstream pressure P2 in the vertical direction from this reference pressure reduction line is the pressure range of the downstream pressure P2 that can be determined that the pressure reducing valve 10 is operating normally, and the upstream gas pressure P1 and the downstream pressure The normal region A can be determined that the relationship with P2 is normal.

  Moreover, the upper limit value P2limit of the downstream pressure P2 is set in this pressure characteristic data. This upper limit value P2limit indicates that the pressure reducing capacity of the pressure reducing valve 10 is significantly reduced regardless of the upstream gas pressure P1 within the pressure range assumed in advance, and hydrogen gas having an abnormally high gas pressure is supplied to the fuel cell stack. A value that would cause When the downstream pressure P2 corresponds to the abnormal region C that is equal to or higher than the upper limit value P2limit, it can be diagnosed that the degree of the abnormal state of the pressure reducing valve 10 is high.

  Further, the pressure characteristic data sets a warning region B that is a relationship between the upstream gas pressure P1 and the downstream pressure P2 excluding the normal region A and the abnormal region C. This warning region B corresponds to the relationship between the upstream gas pressure P1 and the downstream pressure P2 so that the downstream pressure P2 is lower than the upper limit value P2limit and does not correspond to the normal region A. That is, when the downstream pressure P2 corresponds to the warning region B, it is determined that the abnormal state has a low degree of not corresponding to the normal region A and the abnormal region C. The upper limit value P2limit that is the boundary between the warning area B and the abnormal area C is determined by the pressure resistance of the fuel cell system including the fuel cell stack connected to the supply pipe L5, and is set to about 1.5 MPa, for example. Yes.

  Then, the control device 20 determines which region the downstream pressure P2 corresponds to by comparing the pressure characteristic data shown in FIG. 3 with the upstream gas pressure P1 and the downstream pressure P2 (step S5). ).

  Next, in step S5, the control device 20 determines whether the downstream pressure P2 corresponding to the upstream gas pressure P1 corresponds to the normal region A, the warning region B, or the abnormal region C (step S6). . Then, if the control device 20 corresponds to the normal region A, the control device 20 determines that the pressure reducing valve 10 has a normal pressure reducing capability, and proceeds to step S7. In step S7, the control device 20 opens the upstream shut-off valve 8 and the downstream shut-off valve 11 after filling the hydrogen from the filling port 2 into the high-pressure fuel container 6, thereby opening the fuel cell stack from the high-pressure fuel container 6. The normal travel mode is selected in which hydrogen gas is introduced into the fuel cell and the drive motor generates travel torque using the power generated by the fuel cell stack.

  On the other hand, if the control device 20 corresponds to the warning region B or the abnormal region C, the control device 20 determines that a failure in which the pressure reducing capability of the pressure reducing valve 10 is reduced has occurred, and proceeds to step S8. In step S <b> 8, the control device 20 outputs a warning indicating an abnormality of the pressure reducing valve 10 by a control for displaying a warning indicating that an abnormality has occurred in the pressure reducing valve 10 on the display device 32, or by voice. Next, in step S9, the control device 20 determines whether the downstream pressure P2 corresponding to the upstream gas pressure P1 corresponds to the warning region B or the abnormal region C by the determination in step S5.

  If the control device 20 determines that the warning region B is satisfied, the control device 20 proceeds to step S10, and the pressure reducing valve 10 is in an abnormal state in which the pressure reducing capability of the pressure reducing valve 10 is not completely lost. The degree is low, and it is determined that hydrogen gas having an abnormally high pressure is not introduced into the fuel cell stack. Therefore, after filling the hydrogen into the high-pressure fuel container 6 from the filling port 2, the control device 20 opens the upstream side shut-off valve 8 and the downstream side shut-off valve 11 to open the hydrogen from the high-pressure fuel container 6 to the fuel cell stack. A normal travel mode is selected in which gas is introduced and travel torque is generated in the drive motor using the power generated by the fuel cell stack.

  In addition, when the normal travel mode when it is determined that the warning region B is selected, a warning and a warning indicating an abnormality of the pressure reducing valve 10 are displayed on the display device 32 when the fuel cell vehicle is started. This encourages inspections.

  On the other hand, if the control device 20 determines that it falls under the abnormal region C, the process proceeds to step S11, where the pressure reducing valve 10 has a high degree of abnormal state, and hydrogen gas at an abnormally high pressure is introduced into the fuel cell stack. It is determined that it is necessary to prevent this. Therefore, the control device 20 holds the shut-off valve 4, the upstream shut-off valve 8 and the downstream shut-off valve 11 in the closed state after filling the hydrogen into the high-pressure fuel container 6 from the filling port 2, and generates power generated by the fuel cell stack. A battery travel mode is selected in which the travel torque is generated in the drive motor only by battery power. In the battery travel mode when it is determined that the region C is in the abnormal region C, the fuel cell vehicle is traveled in a state where an alarm and a warning indicating an abnormality of the pressure reducing valve 10 are displayed on the display device 32. In this way, when the fuel cell vehicle starts traveling in the battery travel mode, the alarm and warning display is set to the active state, so that the driver can move the fuel cell vehicle to, for example, the nearest repair factory, and the fuel Encourage repair of battery powered vehicles.

  Next, in step S12, the control device 20 stores the travel mode selected in step S7, step S10, or step S11 in the storage device 21 as a diagnosis result.

  Next, in step S13, the control device 20 detects that the filling port door 1 is closed by the lid switch 3, and in step S14, the fuel cell vehicle is activated by an operation signal from a start key or the like (not shown). When this is detected, in step S15, the diagnostic result stored in the storage device 21 in step S12 is read and output to the vehicle control device 31.

  Thereby, in step S16, the control device 20 and the vehicle control device 31 determine whether the travel mode that is the diagnosis result read out in step S15 is the normal travel mode or the battery travel mode.

  In the normal travel mode, the control device 20 controls the upstream shut-off valve 8 and the downstream shut-off valve 11 to be in an open state, and supplies hydrogen gas from the high-pressure fuel container 6 to the fuel cell stack. At the same time, the vehicle control device 31 supplies the drive power to the power generated by the fuel cell stack and the battery power so as to generate a running torque. On the other hand, in the battery running mode, the control device 20 holds the upstream side cutoff valve 8 and the downstream side cutoff valve 11 in a closed state, and the vehicle control device 31 supplies only the battery power to the drive motor. The battery is driven to generate a running torque.

[Effect of the embodiment]
As described in detail above, according to the fuel supply system to which the present invention is applied, when the high pressure fuel container 6 is filled with hydrogen, the upstream gas pressure P1 and the downstream pressure P2 of the pressure reducing valve 10 are detected, Since the travel mode can be changed by diagnosing the degree of the abnormal state of the pressure reducing valve 10, the travel mode at the start of traveling of the fuel cell vehicle can be changed by the abnormality of the pressure reducing valve 10, and the fuel cell system, etc. It is possible to prevent the vehicle drive system from being troubled. In addition, according to this fuel supply system, an abnormality of the pressure reducing valve 10 causes a situation in which hydrogen gas is discharged from the discharge valve 13 as in the case where abnormally high pressure hydrogen gas is supplied to the fuel cell system. Since there is no, fuel consumption can be improved.

  Further, according to this fuel supply system, it is not necessary to diagnose the pressure reducing valve 10 after the fuel cell vehicle is started, and the start time of the fuel cell vehicle can be shortened.

  Further, according to this fuel supply system, when it is diagnosed that the state of the pressure reducing valve 10 is normal, the traveling mode of the fuel cell vehicle is generated by supplying hydrogen gas via the pressure reducing valve 10 to generate a traveling torque. When the pressure reducing valve 10 is diagnosed to be in an abnormal state, the abnormal state is notified, and the fuel cell vehicle driving mode is supplied through the pressure reducing valve 10 when hydrogen gas is supplied. Therefore, it is determined that the travel mode in which the travel torque is generated or the travel mode in which the travel torque is generated by the power of the battery included in the fuel supply system without consuming hydrogen gas. The optimum driving mode can be selected.

  Specifically, according to this fuel supply system, when it is diagnosed that the state of the pressure reducing valve 10 is abnormal, the degree of abnormal state is low such that the downstream pressure P2 does not exceed the upper limit value P2limit. Is determined to be a travel mode in which hydrogen gas is supplied via the pressure reducing valve 10 to generate travel torque in the fuel supply system, and the degree of abnormal state in which the downstream pressure P2 exceeds the upper limit value P2limit is determined. If it is high, it can be determined as a travel mode in which travel torque is generated by the power of the battery without consuming hydrogen gas.

  Furthermore, according to this fuel supply system, when it is detected that the filling port door 1 has been opened, the diagnosis of the state of the pressure reducing valve 10 is started. An abnormality of the pressure reducing valve 10 can be diagnosed when filling with hydrogen.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

It is a block diagram which shows the structure of the fuel supply system to which this invention is applied. It is a flowchart which shows the process sequence of the process which diagnoses the abnormality degree of a pressure-reduction valve at the time of hydrogen filling with the fuel supply system to which this invention is applied, and the process which selects driving mode according to the degree of the abnormal state of a pressure-reduction valve. This is map data for determining the degree of the abnormal state of the pressure reducing valve from the relationship between the gas pressure upstream of the pressure reducing valve and the pressure downstream of the pressure reducing valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filling port door 2 Filling port 3 Lid switch 4 Shutoff valve 5, 9, 12 Actuator 6 High pressure fuel container 7 Check valve 8 Upstream side shutoff valve 10 Pressure reducing valve 11 Downstream side shutoff valve 13 Drain valve 14 Upstream pressure sensor 15 Downstream Side pressure sensor 16 Supply pressure sensor 20 Control device 21 Storage device 31 Vehicle control device 32 Display device

Claims (8)

In a fuel supply device that supplies fuel to a vehicle drive system that is filled with fuel from the outside when the vehicle is stopped and consumes this fuel to generate a running torque of the vehicle,
A container for storing fuel supplied from the outside;
A pressure reducing valve that depressurizes the fuel stored in the container and supplies fuel gas to the vehicle drive system;
An upstream pressure sensor for detecting a gas pressure on the gas upstream side of the pressure reducing valve;
A downstream pressure sensor for detecting a gas pressure on the gas downstream side of the pressure reducing valve;
The degree of abnormality of the pressure reducing valve is diagnosed from the pressure value detected by the upstream pressure sensor and the pressure value detected by the downstream pressure sensor when the container is filled with fuel from the outside. And a control means for changing the travel mode of the vehicle based on the diagnosis result. The control means includes
When it is diagnosed that the state of the pressure reducing valve is normal, the traveling mode of the vehicle is determined as a normal traveling mode in which fuel gas is supplied to the vehicle drive system via the pressure reducing valve to generate a traveling torque. And
When it is diagnosed that the state of the pressure reducing valve is abnormal, the abnormal state is notified, and the running mode of the vehicle is supplied to the vehicle drive system via the pressure reducing valve, and the running torque is supplied. 2. The fuel supply according to claim 1, wherein the fuel supply mode is determined to be a travel mode in which a travel torque is generated or a travel torque is generated by power of a battery included in the vehicle drive system in a state where the fuel gas is not consumed. apparatus.   When the control unit diagnoses that the state of the pressure reducing valve is abnormal and the pressure value detected by the downstream pressure sensor does not exceed the upper limit value, Is determined as a travel mode for generating travel torque by supplying the vehicle drive system, and the fuel gas is not consumed when the pressure value detected by the downstream pressure sensor exceeds the upper limit value. The fuel supply device according to claim 2, wherein the fuel supply device is determined as a travel mode in which a travel torque is generated by electric power of a battery included in the vehicle drive system.   The control means starts diagnosis of the state of the pressure reducing valve when detecting that the filling port door provided in the vehicle body and exposing the filling port connected to the container is opened. The fuel supply device according to any one of claims 1 to 3. In a control method of a fuel supply device that supplies fuel to a vehicle drive system that is filled with fuel from outside when the vehicle is stopped and consumes this fuel to generate a running torque of the vehicle,
In a state where the vehicle is stopped, the start of fuel filling from the outside to the container is detected,
Detecting the gas pressure on the gas upstream side of the pressure reducing valve for depressurizing the fuel stored in the container and supplying the fuel gas to the vehicle drive system, and detecting the gas pressure on the gas downstream side of the pressure reducing valve;
From the gas pressure on the gas upstream side of the pressure reducing valve and the gas pressure on the gas downstream side of the pressure reducing valve, diagnose the degree of the abnormal state of the pressure reducing valve,
A control method for a fuel supply apparatus, comprising: determining a travel mode of the vehicle based on the diagnosis result. When it is diagnosed that the state of the pressure reducing valve is normal, the vehicle traveling mode is determined as a normal traveling mode in which fuel gas is supplied through the pressure reducing valve to generate traveling torque in the vehicle driving system. And
When it is diagnosed that the state of the pressure reducing valve is abnormal, the abnormal state is notified, and a traveling torque of the vehicle is supplied by supplying fuel gas to the vehicle drive system via the pressure reducing valve. Is determined to be a driving mode for generating a driving torque by the power of a battery included in the vehicle drive system without consuming the fuel gas,
The method for controlling the fuel supply device according to claim 5, wherein when the vehicle is started, the vehicle drive system is operated in the determined travel mode. When diagnosing that the state of the pressure reducing valve is abnormal, the gas pressure on the gas downstream side of the pressure reducing valve is compared with the upper limit value,
When the gas pressure on the gas downstream side of the pressure reducing valve does not exceed the upper limit value, the fuel gas is supplied to the vehicle drive system via the pressure reducing valve and determined as a traveling mode for generating traveling torque, When the gas pressure on the gas downstream side of the pressure reducing valve exceeds the upper limit value, it is determined as a travel mode in which travel torque is generated by the power of the battery included in the vehicle drive system without consuming the fuel gas. The method of controlling a fuel supply device according to claim 6.   6. The diagnosis of the state of the pressure reducing valve is started when it is detected that a filling port door provided in a vehicle body and exposing a filling port connected to the container to the outside is in an open state. The control method of the fuel supply apparatus in any one of Claim thru | or 7.

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