Control device, mobile body, abnormality detection method, and program

Abstract

To provide a technology that can more effectively detect an abnormality in an on-off valve.SOLUTION: A control device 28 according to the present disclosure includes an on-off valve control unit that executes control to close an on-off valve 20 between a fuel tank and a second fuel flow path 22 when fuel is supplied from a first fuel flow path 16 to a fuel tank 18, and a determination unit that determines whether there is an abnormality in the on-off valve on the basis of a change in the pressure of fuel in the second fuel flow path when fuel is supplied from the first fuel flow path to the fuel tank and control to close the on-off valve is being executed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a control device, a moving object, an abnormality detection method, and a program. [Background technology]

[0002] Patent Document 1 discloses a fuel cell system. This fuel cell system includes a filling-side check valve, which is an opening / closing valve for preventing the backflow of hydrogen (fuel), and a determination unit for determining whether the filling-side check valve is stuck (broken) in the open state. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7135986 Summary of the Invention [Problem to be solved by the invention]

[0004] There is a need for a technology that can more effectively detect abnormalities in on-off valves.

[0005] The present invention aims to solve the above-mentioned problems. [Means for solving the problem]

[0006] A first aspect of the present invention is a control device for a fuel supply system, the fuel supply system including a fuel tank for storing fuel supplied from a first fuel flow path, and an on-off valve provided between the fuel tank and a second fuel flow path that supplies the fuel to a destination that consumes the fuel stored in the fuel tank, the control device including an on-off valve control unit that executes control to close the on-off valve when the fuel is supplied to the fuel tank from the first fuel flow path, and a judgment unit that judges whether or not there is an abnormality in the on-off valve based on a change in pressure of the fuel in the second fuel flow path when the fuel is supplied to the fuel tank from the first fuel flow path and control to close the on-off valve is being executed.

[0007] A second aspect of the present invention is a moving body including the control device and the fuel supply system.

[0008] A third aspect of the present invention is an abnormality detection method executed by a computer to detect an abnormality in a fuel supply system, the fuel supply system including a fuel tank for storing fuel supplied from a first fuel flow path, and an on-off valve provided between the fuel tank and a second fuel flow path that supplies the fuel to a destination that consumes the fuel stored in the fuel tank, the method having an on-off valve control step of executing control to close the on-off valve when the fuel is supplied to the fuel tank from the first fuel flow path, and a determination step of determining whether or not there is an abnormality in the on-off valve based on a change in pressure of the fuel in the second fuel flow path when the fuel is supplied to the fuel tank from the first fuel flow path and control to close the on-off valve is being executed.

[0009] A fourth aspect of the present invention is a program for causing the computer to execute the abnormality detection method. Effect of the Invention

[0010] The present invention can more effectively detect an abnormality in an on-off valve. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a system configuration diagram of a fuel supply system provided in a moving body according to one embodiment. [Diagram 2] FIG. 2 is a block diagram of the control device. [Diagram 3] FIG. 3 is a graph showing a change in fuel pressure in the second fuel flow passage when the on-off valve is normal. [Figure 4] FIG. 4 is a graph showing a change in fuel pressure in the second fuel flow passage when the on-off valve is abnormal. [Diagram 5] FIG. 5 is a flow chart illustrating an example of an anomaly detection method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Regarding the method for detecting an abnormality in an on-off valve, the fuel cell system of Patent Document 1 has at least the following problems: That is, according to Patent Document 1, fuel is consumed to determine the presence or absence of an abnormality in the on-off valve.

[0013] (One embodiment) FIG. 1 is a system configuration diagram of a fuel supply system 12 provided in a moving object 10 according to one embodiment.

[0014] The moving body 10 is, for example, a vehicle such as an FCV (Fuel Cell Vehicle). As shown in Fig. 1, the moving body 10 includes a fuel supply system 12. The fuel supply system 12 includes a filling unit 14, a first fuel flow path 16, a fuel tank 18, an on-off valve 20, a second fuel flow path 22, a fuel cell system 24, a sensor (pressure sensor) 26, and a control device 28.

[0015] The filling unit 14 includes a connector (not shown) that is connected to the fuel supply device 30. The fuel supply device 30 is a device that supplies fuel to the moving body 10. More specifically, the fuel supply device 30 is a device that supplies fuel to a fuel supply system 12 provided in the moving body 10. The fuel supply device 30 is a device external to the moving body 10. For example, an FCV consumes hydrogen as fuel. In this case, the fuel supply device 30 may include a nozzle 30n that can be connected to the connector and can eject hydrogen (hydrogen gas). Such a fuel supply device 30 is installed, for example, in a hydrogen station.

[0016] The first fuel flow passage 16 includes, for example, a pipe member that connects the filling section 14 and the fuel tank 18. The first fuel flow passage 16 is supplied with fuel from a fuel supply device 30 connected to the filling section 14. The fuel supplied to the first fuel flow passage 16 via the filling section 14 flows toward the fuel tank 18 (arrow FL1 in FIG. 1).

[0017] The fuel tank 18 stores the fuel supplied via the first fuel passage 16. The fuel tank 18 also communicates via an on-off valve 20 with a second fuel passage 22 that is different from the first fuel passage 16.

[0018] The on-off valve 20 is a shutoff valve that can be opened and closed. When the on-off valve 20 is in an open state, fuel supply from the fuel tank 18 to the second fuel flow path 22 is permitted (arrow FL2 in FIG. 1). In contrast, when the on-off valve 20 is in a closed state, fuel supply from the fuel tank 18 to the second fuel flow path 22 is restricted (shut off). Opening and closing control of the on-off valve 20 can be appropriately performed by a control device 28 provided in the vehicle. A more detailed description of the control device 28 will be given later.

[0019] The second fuel flow path 22 is formed of, for example, a part of a pipe member connecting the on-off valve 20 and the fuel cell system 24. The second fuel flow path 22 communicates with the fuel tank 18 via a second check valve 362 described later. The second fuel flow path 22 may be supplied with fuel from the fuel tank 18. More specifically, when the on-off valve 20 is in an open state, the fuel may be supplied from the fuel tank 18 to the second fuel flow path 22. The fuel supplied to the second fuel flow path 22 flows toward the fuel cell system 24. As shown in FIG. 1, the fuel supply system 12 may further include a third fuel flow path 32 that connects the on-off valve 20 and the first fuel flow path 16. In this case, the fuel tank 18 and the on-off valve 20 are connected via a part of the first fuel flow path 16 and the third fuel flow path 32. The third fuel flow path 32 may be provided in the fuel tank 18.

[0020] The fuel cell system 24 is a destination of the fuel (hydrogen) stored in the fuel tank 18. The fuel cell system 24 consumes the fuel supplied from the fuel tank 18 and outputs electric power for driving the moving body 10. The fuel cell system 24 provided in a vehicle such as an FCV includes, for example, a fuel cell stack (not shown). The fuel cell stack generates electric power using hydrogen. An electric motor provided in the vehicle drives the wheels and the like of the moving body 10 using the electric power output from the fuel cell system 24. Note that the destination of the fuel is not limited to the fuel cell system 24. In other words, the manner of the destination of the fuel can be changed as appropriate depending on the type of the fuel.

[0021] The pressure sensor 26 is a sensor that outputs a detection signal corresponding to the fuel pressure, which is the pressure of the fuel. The pressure sensor 26 is provided in the second fuel flow path 22. Therefore, the pressure sensor 26 outputs a detection signal corresponding to the fuel pressure in the second fuel flow path 22. The detection signal is input to the control device 28. As shown in FIG. 1, the second fuel flow path 22 may further include a regulator 34. The regulator 34 reduces and stabilizes the fuel pressure. This stabilizes the load on the fuel cell system 24. The pressure sensor 26 may be provided between the on-off valve 20 and the regulator 34, but is not limited to this.

[0022] The fuel supply system 12 may further include a plurality of check valves 36 (361 to 363). The plurality of check valves 36 include, for example, a first check valve 361, a second check valve 362, and a third check valve 363, which will be described below. The first check valve 361 is provided in the first fuel flow path 16 or the fuel tank 18. The first check valve 361 prevents the fuel from flowing back from the fuel tank 18 toward the first fuel flow path 16. The second check valve 362 is provided in the second fuel flow path 22. The second check valve 362 prevents the fuel from flowing back from the fuel cell system 24 (the second fuel flow path 22) toward the on-off valve 20. As shown in FIG. 1, the second check valve 362 is preferably provided between the on-off valve 20 and the pressure sensor 26. The third check valve 363 is provided in the filling section 14. The third check valve 363 prevents the fuel from flowing back from the filling section 14 toward the fuel supply device 30.

[0023] Although not shown, the fuel supply system 12 may further include a sensor for detecting the fuel pressure in the first fuel passage 16 and a sensor for detecting the temperature inside the fuel tank 18.

[0024] FIG. 2 is a block diagram of the control device 28.

[0025] The control device 28 is a computer (processing circuit) that controls the fuel supply system 12. The control device 28 is, for example, an ECU (Electronic Control Unit). As shown in FIG.

[0026] The storage unit 38 includes one or more memories (not shown). More specifically, the storage unit 38 includes nonvolatile memories such as a ROM (Read Only Memory), a flash memory, and a magnetic disk, and volatile memories such as a RAM (Random Access Memory). The nonvolatile memory stores, for example, a computer-executable program. The volatile memory stores, for example, data and the like that is temporarily required when a processor (calculation unit 40) described later performs calculations based on a program.

[0027] The calculation unit 40 includes a processor (not shown), such as a central processing unit (CPU) or a graphics processing unit (GPU). The calculation unit 40 may include one or more processors. At least a part of the calculation unit 40 may be realized by a predetermined integrated circuit, such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA).

[0028] The calculation unit 40 includes a pressure information acquisition unit 42, an on-off valve control unit 44, and a determination unit 46. The pressure information acquisition unit 42, the on-off valve control unit 44, and the determination unit 46 are realized by the calculation unit 40 (processor) executing a program stored in the storage unit 38 (memory). At least a part of the pressure information acquisition unit 42, the on-off valve control unit 44, and the determination unit 46 may be realized by an integrated circuit such as the above-mentioned ASIC or FPGA.

[0029] The pressure information acquiring unit 42 acquires information indicating the fuel pressure based on the detection signal output from the pressure sensor 26. As described above, the pressure sensor 26 is provided in the second fuel flow path 22. Therefore, the pressure information acquiring unit 42 can acquire information indicating the fuel pressure in the second fuel flow path 22. The pressure sensor 26 can sequentially output a detection signal corresponding to the fuel pressure. Therefore, the pressure information acquiring unit 42 can sequentially acquire information indicating the fuel pressure in the second fuel flow path 22.

[0030] The on-off valve control unit 44 executes control for closing the on-off valve 20. For example, when the nozzle 30n is connected to the filling unit 14, the on-off valve control unit 44 outputs a close control signal, which is a control signal for closing the on-off valve 20, to the on-off valve 20. The on-off valve 20 transitions to a closed state in response to the close control signal. Also, for example, when the connection between the filling unit 14 and the nozzle 30n is released, the on-off valve control unit 44 may output an open control signal, which is a control signal for opening the on-off valve 20, to the on-off valve 20. The on-off valve 20 transitions to an open state in response to the open control signal.

[0031] The determination unit 46 determines whether or not fuel is being supplied from the first fuel flow path 16 to the fuel tank 18 while control is being executed to close the on-off valve 20. As described above, the first fuel flow path 16 may be provided with a sensor (not shown) for detecting the fuel pressure in the first fuel flow path 16. In this case, the determination unit 46 may obtain information indicating the fuel pressure in the first fuel flow path 16 based on a detection signal from the sensor. In this way, the determination unit 46 can determine whether or not fuel is being supplied from the first fuel flow path 16 to the fuel tank 18 based on the information indicating the fuel pressure in the first fuel flow path 16.

[0032] Furthermore, when fuel is being supplied from the first fuel flow path 16 to the fuel tank 18 while control for closing the on-off valve 20 is being executed, the determination unit 46 executes the determination described below. That is, the determination unit 46 determines whether or not the on-off valve 20 is stuck in the open state based on whether or not the fuel pressure in the second fuel flow path 22 increases excessively.

[0033] Fig. 3 is a graph showing a change in fuel pressure in the second fuel flow passage 22 when the on-off valve 20 is normal. The vertical axis of Fig. 3 represents the fuel pressure. The horizontal axis of Fig. 3 represents time.

[0034] As described above, when the on-off valve 20 is in the closed state, the fuel supply from the fuel tank 18 to the second fuel flow path 22 is restricted. Therefore, if the on-off valve 20 is in the closed state when the fuel supply from the first fuel flow path 16 to the fuel tank 18 is started, the fuel pressure in the second fuel flow path 22 does not increase during the fuel supply from the first fuel flow path 16 to the fuel tank 18. For example, a start time t0 and an end time t1 are shown in FIG. 3. The start time t0 is the time when the fuel supply from the fuel supply device 30 to the fuel tank 18 is started. The end time t1 is the time when the fuel supply is completed. As shown in FIG. 3, during the period from the start time t0 to the end time t1, the fuel pressure in the second fuel flow path 22 can be maintained at a certain pressure higher than the atmospheric pressure, for example.

[0035] 4 is a graph showing a change in fuel pressure in the second fuel flow passage 22 when an abnormality occurs in the on-off valve 20. The graph format of FIG. 4 is similar to that of FIG.

[0036] Even if a close control signal is output from the on-off valve control unit 44, the on-off valve 20 stuck in the open state cannot transition to the closed state in response to the close control signal. Therefore, after the fuel supply device 30 starts supplying fuel to the fuel tank 18, a part of the fuel supplied to the first fuel flow path 16 leaks into the second fuel flow path 22 via the on-off valve 20. As a result, the fuel pressure in the second fuel flow path 22 excessively increases during the supply of fuel from the first fuel flow path 16 to the fuel tank 18. For example, a start time t0 and an end time t1 are shown in FIG. 4 as in FIG. 3. When the on-off valve 20 is stuck in the open state, the fuel pressure in the second fuel flow path 22 increases during the period from the start time t0 to the end time t1 as shown in FIG. 4. By detecting the increase, the determination unit 46 can determine whether or not there is an abnormality in the on-off valve 20. For example, when the amount of increase Pup of the fuel pressure in the second fuel flow path 22 after the supply of fuel to the fuel tank 18 starts exceeds a predetermined amount of increase threshold Th, the determination unit 46 determines that the on-off valve 20 is stuck in the open state. The amount of increase threshold Th is determined in advance, for example, based on an experiment. The amount of increase Pup may be the amount of increase in the fuel pressure per unit time.

[0037] The result of the determination by the determination unit 46 may be reported to the owner (driver) of the mobile body 10 via, for example, an alarm (monitor, lamp, speaker, etc.) (not shown) provided in the mobile body 10, but is not limited to this. For example, the result of the determination by the determination unit 46 may be transmitted via a network to a terminal device such as a smartphone carried by an administrator who manages the mobile body 10. This allows the result of the determination by the determination unit 46 to be reported to the administrator via the terminal device.

[0038] FIG. 5 is a flow chart illustrating an example of an anomaly detection method.

[0039] The control device 28 can execute the abnormality detection method of Fig. 5. This abnormality detection method can be executed by a calculation unit 40 (processor) executing a program stored in a storage unit 38 (memory). The abnormality detection method includes an on-off valve control step S1 and a determination step S2.

[0040] The on-off valve control step S1 is started when fuel is supplied to the fuel tank 18 through the first fuel flow path 16. That is, the on-off valve control step S1 is started when, for example, the filling unit 14 and the nozzle 30n are connected. In the on-off valve control step S1, the on-off valve control unit 44 executes control to close the on-off valve 20.

[0041] Next, the process proceeds to a determination step S2, where the determination unit 46 determines whether or not the fuel pressure in the second fuel flow path 22 will rise excessively. The determination step S2 can be executed during a period in which fuel is supplied to the fuel tank 18 (the fuel supply period in FIG. 5). In the determination step S2, the pressure information acquisition unit 42 sequentially acquires information indicating the pressure in the second fuel flow path 22. The determination unit 46 can determine whether or not the fuel pressure in the second fuel flow path 22 will rise excessively based on the information acquired by the pressure information acquisition unit 42. If the fuel pressure in the second fuel flow path 22 rises excessively (S2: YES), it is determined that there is an abnormality in the on-off valve 20 (RETURN: Abnormality Present). If the fuel pressure in the second fuel flow path 22 does not rise excessively (S2: NO), it is determined that there is no abnormality in the on-off valve 20 (RETURN: No Abnormality).

[0042] This ends the abnormality detection method of Fig. 5. Note that the result of the determination by the determination unit 46 may be notified to the owner (driver) of the mobile body 10 via, for example, an alarm (not shown) provided in the mobile body 10, but is not limited to this.

[0043] According to this embodiment, the control device 28 and the abnormality detection method can achieve the effects described below.

[0044] In this embodiment, the determination unit 46 determines whether or not the fuel pressure in the second fuel flow path 22 will excessively increase when fuel is supplied from the first fuel flow path 16 to the fuel tank 18 while control for closing the on-off valve 20 is being executed. In this manner, it is not necessary to cause the fuel cell system 24 to consume fuel in order to detect an abnormality in the on-off valve 20. In other words, the control device 28 suppresses the amount of fuel consumption.

[0045] When the increase amount Pup of the fuel pressure exceeds a predetermined increase amount threshold Th, the determination unit 46 determines that there is an abnormality in the on-off valve 20. As a result, only when the fuel pressure has changed to a degree that is significant with respect to the detection of an abnormality in the on-off valve 20, it is determined that there is an abnormality in the on-off valve 20. Therefore, erroneous detection of an abnormality in the on-off valve 20 is suppressed.

[0046] As described above, the fuel supply system 12 may include a plurality of check valves 36. The plurality of check valves 36 prevent fuel from flowing back from the fuel tank 18 toward the first fuel flow path 16. This makes it easier for fuel to leak into the second fuel flow path 22 instead of the first fuel flow path 16 when the on-off valve 20 is stuck in the open state. That is, an increase in fuel pressure in the second fuel flow path 22 caused by an abnormality in the on-off valve 20 is easier to detect by the pressure sensor 26.

[0047] The fuel supply system 12 may include a second check valve 362 that prevents fuel from flowing back from the fuel cell system 24 toward the on-off valve 20. This makes it easier for the fuel pressure in the second fuel flow path 22 to increase when the on-off valve 20 is stuck in the open state. As a result, an increase in fuel pressure in the second fuel flow path 22 caused by an abnormality in the on-off valve 20 is easier to detect by the pressure sensor 26.

[0048] The second check valve 362 is preferably provided between the on-off valve 20 and the pressure sensor 26. This makes it easier for the pressure sensor 26 to detect an increase in fuel pressure in the second fuel flow path 22 when the on-off valve 20 is stuck in the open state.

[0049] The fuel supply system 12 may include a third check valve 363 that prevents the fuel from flowing back from the filling section 14 toward the fuel supply device 30. This allows the fuel supplied to the first fuel flow path 16 to flow reliably toward the fuel tank 18. As a result, when the on-off valve 20 is stuck in the open state, the fuel is more likely to leak into the second fuel flow path 22 rather than the first fuel flow path 16. That is, an increase in fuel pressure in the second fuel flow path 22 caused by an abnormality in the on-off valve 20 is more likely to be detected by the pressure sensor 26.

[0050] The embodiment may be modified as follows. In the following modified examples, descriptions that overlap with the embodiment will be omitted as appropriate. In addition, in the drawings used in the following modified examples, the same reference numerals are used for configurations that are the same as those described in the embodiment.

[0051] (Variation 1) The control device 28 may be provided with a communication device (not shown), and a signal indicating that the fuel supply device 30 is connected to the filling unit 14 may be transmitted from the fuel supply device 30 to the communication device. In this case, the on-off valve control unit 44 may determine whether or not the fuel supply device 30 is connected to the filling unit 14 based on the signal obtained from the fuel supply device 30. That is, the on-off valve control unit 44 may determine whether or not fuel supply from the fuel supply device 30 to the fuel tank 18 is started based on the signal obtained from the fuel supply device 30.

[0052] The communication method between the fuel supply device 30 and the above-mentioned communication device is, for example, infrared communication, but is not limited to this.

[0053] (Variation 2) A signal indicating that fuel supply from the fuel supply device 30 to the moving body 10 (filling unit 14) is being performed may be transmitted from the fuel supply device 30 to the above-mentioned communication device (see Modification 1). In this case, the determination unit 46 can determine whether or not fuel is being supplied from the first fuel flow path 16 to the fuel tank 18 based on the signal obtained from the fuel supply device 30.

[0054] (Combination of multiple modifications) The above-described multiple modified examples may be combined as appropriate within a range that does not contradict each other.

[0055] The following supplementary notes are further disclosed regarding the above embodiment.

[0056] (Appendix 1) A control device (28) according to the present disclosure is a control device for a fuel supply system (12), the fuel supply system including a fuel tank (18) for storing fuel supplied from a first fuel flow path (16), an on-off valve (20) provided between the fuel tank and a second fuel flow path (22) for supplying the fuel to a destination that consumes the fuel stored in the fuel tank, an on-off valve control unit (44) for executing control to close the on-off valve when the fuel is supplied from the first fuel flow path to the fuel tank, and a determination unit (46) for determining the presence or absence of an abnormality in the on-off valve based on a change in pressure of the fuel in the second fuel flow path when the fuel is supplied from the first fuel flow path to the fuel tank and control to close the on-off valve is being executed. This reduces fuel consumption related to detection of an abnormality in the on-off valve.

[0057] (Appendix 2) In the control device according to Supplementary Note 1, the determination unit may determine that the abnormality exists when the pressure increase (Pup) exceeds a predetermined increase amount threshold (Th). This suppresses erroneous detection of an abnormality in the on-off valve.

[0058] (Appendix 3) A moving body (10) according to the present disclosure is a moving body including the control device according to appendix 1 or 2 and the fuel supply system. This reduces fuel consumption related to abnormality detection of an on-off valve provided in the moving body. As a result, an increase in fuel costs for the moving body can be suppressed.

[0059] (Appendix 4) The moving body described in Supplementary Note 3 may further include a first check valve (361) that prevents a backflow of the fuel from the fuel tank toward the first fuel flow path. This makes it easier for a pressure sensor to detect an increase in fuel pressure in the second fuel flow path caused by an abnormality in an opening / closing valve. The moving body is, for example, a vehicle such as an FCV.

[0060] (Appendix 5) The movable body according to Supplementary Note 3 or 4 may further include a second check valve (362) for preventing a backflow of the fuel from the second fuel passage toward the fuel tank. This makes it easier for the pressure sensor to detect an increase in fuel pressure in the second fuel passage caused by an abnormality in an opening / closing valve.

[0061] (Appendix 6) The abnormality detection method according to the present disclosure is an abnormality detection method executed by a computer to detect an abnormality in a fuel supply system (12), the fuel supply system including a fuel tank (18) for storing fuel supplied from a first fuel flow path (16), and an on-off valve (20) provided between the fuel tank and a second fuel flow path (22) for supplying the fuel to a destination that consumes the fuel stored in the fuel tank, the method including an on-off valve control step (S1) for executing control to close the on-off valve when the fuel is supplied from the first fuel flow path to the fuel tank, and a determination step (S2) for determining the presence or absence of an abnormality in the on-off valve based on a change in pressure of the fuel in the second fuel flow path when the fuel is supplied from the first fuel flow path to the fuel tank and control to close the on-off valve is being executed. This reduces fuel consumption related to the detection of an abnormality in the on-off valve.

[0062] (Appendix 7) The program according to the present disclosure is a program that causes the computer to execute the anomaly detection method described in Appendix 6.

[0063] The present invention is not limited to the above disclosure, and various configurations may be adopted without departing from the gist of the present disclosure. [Explanation of symbols]

[0064] 10. Mobile 12...Fuel supply system 16…First fuel passage 18…Fuel tank 20...Shut-off valve 22...Second fuel passage 26...Sensor (pressure sensor) 28...Control device 36...Check valve 46...Opening and closing valve control section 48…Judgment section 361...First check valve 362...Second check valve Pup…Amount of increase Th…Increase threshold

Claims

1. A control device for a fuel supply system, comprising: The fuel supply system includes: a fuel tank that stores fuel supplied from the first fuel flow path; an on-off valve provided between the fuel tank and a second fuel flow path that supplies the fuel to a destination that consumes the fuel stored in the fuel tank; is provided, an on-off valve control unit that executes control to close the on-off valve when the fuel is supplied from the first fuel flow path to the fuel tank; a determination unit that determines whether or not an abnormality exists in the on-off valve based on a change in pressure of the fuel in the second fuel flow path while the fuel is supplied from the first fuel flow path to the fuel tank and control for closing the on-off valve is being executed; and A control device comprising:

2. The control device according to claim 1 , When the amount of increase in pressure exceeds a predetermined increase amount threshold, the determination unit determines that the abnormality exists.

3. A mobile object comprising the control device according to claim 1 and the fuel supply system.

4. The moving body according to claim 3, the movable body further comprising a first check valve configured to prevent a backflow of the fuel from the fuel tank toward the first fuel passage.

5. A moving body according to claim 3 or 4, The movable body further includes a second check valve that prevents a backflow of the fuel from the second fuel passage toward the fuel tank.

6. 1. A method for detecting an abnormality in a fuel supply system, the method comprising: The fuel supply system includes: a fuel tank that stores fuel supplied from the first fuel flow path; an on-off valve provided between the fuel tank and a second fuel flow path that supplies the fuel to a destination that consumes the fuel stored in the fuel tank; is provided, an on-off valve control step of executing control to close the on-off valve when the fuel is supplied from the first fuel flow path to the fuel tank; a determination step of determining whether or not an abnormality exists in the on-off valve based on a change in pressure of the fuel in the second fuel flow path while the fuel is supplied from the first fuel flow path to the fuel tank and control for closing the on-off valve is being executed; The anomaly detection method includes:

7. A program for causing a computer to execute the anomaly detection method according to claim 6.

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