Control device, moving object, abnormality detection method, and computer program product

Abstract

The invention provides a control device, a moving object, an abnormality detection method, and a computer program product. A control device (28) according to the present invention is provided with: an on-off valve control unit (44) for executing control for closing an on-off valve (20) between a fuel tank (18) and a second fuel flow path (22) when fuel is supplied from a first fuel flow path (16) to the fuel tank (18); the determination unit determines whether or not there is an abnormality in the switching valve on the basis of 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 for closing the switching valve is executed. Therefore, the abnormality of the switch valve can be better detected.

Description

Technical Field

[0001] The present invention relates to a control device, a moving object, an abnormality detection method and a computer program product. Background Art

[0002] Japanese Patent Application No. 7135986 discloses a fuel cell system having a filling-side backflow prevention valve which is an on-off valve for preventing backflow of hydrogen (fuel) and a determination unit for determining whether the filling-side backflow prevention valve is stuck in an open state (failed in an open state). Summary of the invention

[0003] A technology that can better detect abnormalities in on-off valves is desired.

[0004] The purpose of the present invention is to solve the above technical problems.

[0005] The first embodiment of the present invention is a control device for a fuel supply system, wherein the fuel supply system has a fuel tank and a switch valve, wherein the fuel tank is used to store fuel supplied by a first fuel flow path; the switch valve is arranged between a second fuel flow path and the fuel tank, and the second fuel flow path is used to supply the fuel to the fuel supply object that consumes the fuel stored in the fuel tank, and the control device has a switch valve control unit and a determination unit, wherein the switch valve control unit performs control for closing the switch valve when the fuel is supplied from the first fuel flow path to the fuel tank; the determination unit determines whether there is an abnormality in the switch valve based on a pressure change 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 for closing the switch valve is performed.

[0006] A second aspect of the present invention is a mobile body including the control device and the fuel supply system.

[0007] The third embodiment of the present invention is an abnormality detection method, which is executed by a computer and is used to detect abnormalities in a fuel supply system, wherein the fuel supply system has a fuel tank and a switch valve, wherein the fuel tank is used to store fuel supplied by a first fuel flow path; the switch valve is arranged between a second fuel flow path and the fuel tank, and the second fuel flow path is used to supply the fuel to a fuel supply object that consumes the fuel stored in the fuel tank, and the abnormality detection method has a switch valve control step and a judgment step, wherein, in the switch valve control step, control for closing the switch valve is performed when the fuel is supplied from the first fuel flow path to the fuel tank; in the judgment step, it is judged whether there is an abnormality in the switch valve based on the pressure change 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 for closing the switch valve is performed.

[0008] A fourth aspect of the present invention is a program for causing the computer to execute the abnormality detection method.

[0009] The present invention can better detect the abnormality of the switch valve.

[0010] The above-mentioned objects, features, and advantages will be easily understood from the following description of the embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a system configuration diagram of a fuel supply system included in a mobile object according to an embodiment.

[0012] Figure 2 is a block diagram of the control device.

[0013] Figure 3 It is a line graph showing the change in the fuel pressure in the second fuel flow path when the on-off valve is normal.

[0014] Figure 4 It is a line graph showing the change in the fuel pressure in the second fuel flow path when the on-off valve is abnormal.

[0015] Figure 5 is a flowchart illustrating an abnormality detection method. DETAILED DESCRIPTION

[0016] Regarding the method for detecting an abnormality of the on-off valve, the fuel cell system of Japanese Patent No. 7135986 has at least the following technical problems: That is, according to Japanese Patent No. 7135986, fuel is consumed to determine whether an abnormality exists in the on-off valve.

[0017] (One embodiment) Figure 1 It is a system configuration diagram of a fuel supply system 12 included in a mobile object 10 according to an embodiment.

[0018] The moving object 10 is, for example, a vehicle such as a FCV (Fuel Cell Vehicle). Figure 1 As shown, the mobile body 10 has a fuel supply system 12. The fuel supply system 12 has 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.

[0019] The filling unit 14 includes a connector (not shown) connected to a fuel supply device 30. The fuel supply device 30 is a device for supplying fuel to the mobile body 10. More specifically, the fuel supply device 30 is a device for supplying fuel to a fuel supply system 12 possessed by the mobile body 10. The fuel supply device 30 is a device external to the mobile body 10. For example, an FCV consumes hydrogen as fuel. In this case, the fuel supply device 30 may have a nozzle 30n that can be connected to the above-mentioned connector and can discharge hydrogen (hydrogen gas). Such a fuel supply device 30 is, for example, provided at a hydrogen station.

[0020] The first fuel flow path 16 includes, for example, a pipe member connecting the filling portion 14 and the fuel tank 18. The fuel is supplied to the first fuel flow path 16 by a fuel supply device 30 connected to the filling portion 14. The fuel supplied to the first fuel flow path 16 via the filling portion 14 flows to the fuel tank 18 ( Figure 1 FL1).

[0021] The fuel tank 18 stores the fuel supplied through the first fuel flow path 16. The fuel tank 18 communicates with a second fuel flow path 22 different from the first fuel flow path 16 via an on-off valve 20.

[0022] The switch valve 20 is a shutoff valve that can be opened and closed. When the switch valve 20 is in an open state, fuel is allowed to be supplied from the fuel tank 18 to the second fuel flow path 22 ( Figure 1 In contrast, when the switch valve 20 is in the closed state, the fuel supply from the fuel tank 18 to the second fuel flow path 22 is restricted (cut off). The switch control of the switch valve 20 can be appropriately performed by a control device 28 included in the vehicle. A more detailed description of the control device 28 will be described later.

[0023] The second fuel flow path 22 is composed of, for example, a portion of a pipe member connecting the switch valve 20 and the fuel cell system 24. The second fuel flow path 22 is connected to the fuel tank 18 through the second check valve 362 described later. Fuel can be supplied from the fuel tank 18 to the second fuel flow path 22. More specifically, when the switch valve 20 is in an open state, fuel can 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 to the fuel cell system 24. In addition, as Figure 1 As shown, 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 portion of the first fuel flow path 16 and the third fuel flow path 32. The third fuel flow path 32 may also be provided in the fuel tank 18.

[0024] The fuel cell system 24 is a supply target 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 electricity for driving the mobile body 10. The fuel cell system 24 of a vehicle such as an FCV includes, for example, a fuel cell stack not shown. The fuel cell stack uses hydrogen to generate electricity. The electric motor of the vehicle uses the electricity output by the fuel cell system 24 to drive the wheels of the mobile body 10, etc. In addition, the supply target of the fuel is not limited to the fuel cell system 24. That is, the pattern of the supply target of the fuel can be appropriately changed according to the type of the fuel.

[0025] The pressure sensor 26 is a sensor for outputting a detection signal corresponding to the pressure of the fuel, that is, the fuel pressure. 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 of the second fuel flow path 22. The detection signal is input to the control device 28. In addition, as Figure 1 As shown, a regulator 34 may be further provided on the second fuel flow path 22. The regulator 34 reduces the fuel pressure and stabilizes it. As a result, the load applied to the fuel cell system 24 is stabilized. The pressure sensor 26 may be provided between the switch valve 20 and the regulator 34, but is not limited thereto.

[0026] The fuel supply system 12 may also have a plurality of check valves 36 (361 to 363). The plurality of check valves 36 include, for example, the first check valve 361, the second check valve 362, and the third check valve 363 described below. The first check valve 361 is disposed 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 to the first fuel flow path 16. The second check valve 362 is disposed in the second fuel flow path 22. The second check valve 362 prevents the fuel from flowing back from the fuel cell system 24 (second fuel flow path 22) to the switch valve 20. Figure 1 As shown, 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 portion 14. The third check valve 363 prevents the fuel from flowing back from the filling portion 14 to the fuel supply device 30.

[0027] Although not shown in the drawings, the fuel supply system 12 may further include a sensor for detecting the fuel pressure in the first fuel flow path 16 and a sensor for detecting the temperature in the fuel tank 18 .

[0028] Figure 2 is a block diagram of the control device 28.

[0029] The control device 28 is a computer (processing circuit) for controlling the fuel supply system 12. The control device 28 is, for example, an ECU (Electronic Control Unit). Figure 2 As shown, the control device 28 can include a storage unit 38 and a computing unit 40 .

[0030] The storage unit 38 includes one or more memories (not shown). More specifically, the storage unit 38 includes nonvolatile memories such as ROM (Read Only Memory), flash memory, and magnetic disk, and volatile memories such as RAM (Random Access Memory). The nonvolatile memory stores, for example, computer-executable programs. The volatile memory stores, for example, data temporarily required when the processor (calculation unit 40) described later performs calculations according to the program.

[0031] The computing unit 40 includes a processor (not shown) such as a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit). The computing unit 40 can include one or more processors. At least a portion of the computing unit 40 can be implemented by a predetermined integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array).

[0032] The operation unit 40 includes a pressure information acquisition unit 42, a switch valve control unit 44, and a determination unit 46. The pressure information acquisition unit 42, the switch valve control unit 44, and the determination unit 46 are implemented by the operation 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 switch valve control unit 44, and the determination unit 46 may also be implemented by an integrated circuit such as the above-mentioned ASIC, FPGA, etc.

[0033] The pressure information acquisition unit 42 acquires information indicating the fuel pressure based on the detection signal output by the pressure sensor 26. As described above, the pressure sensor 26 is provided in the second fuel flow path 22. Therefore, the pressure information acquisition unit 42 can acquire information indicating the fuel pressure of the second fuel flow path 22. The pressure sensor 26 can sequentially output detection signals corresponding to the fuel pressure. Therefore, the pressure information acquisition unit 42 can sequentially acquire information indicating the fuel pressure of the second fuel flow path 22.

[0034] The switch valve control unit 44 performs control for closing the switch valve 20. For example, when the nozzle 30n is connected to the filling unit 14, the switch valve control unit 44 outputs a control signal for closing the switch valve 20, that is, a closing control signal, to the switch valve 20. The switch valve 20 shifts to the closed state in response to the closing control signal. In addition, for example, when the connection between the filling unit 14 and the nozzle 30n is released, the switch valve control unit 44 may output a control signal for opening the switch valve 20, that is, an opening control signal, to the switch valve 20. The switch valve 20 shifts to the open state in response to the opening control signal.

[0035] The determination unit 46 determines whether fuel is supplied from the first fuel flow path 16 to the fuel tank 18 in a state where the control for closing the on-off valve 20 is executed. As described above, the first fuel flow path 16 may be provided with a sensor (not shown) for detecting the fuel pressure of the first fuel flow path 16. In this case, the determination unit 46 can obtain information indicating the fuel pressure of the first fuel flow path 16 based on the detection signal of the sensor. Accordingly, the determination unit 46 can determine whether fuel is supplied from the first fuel flow path 16 to the fuel tank 18 based on the information indicating the fuel pressure of the first fuel flow path 16.

[0036] When fuel is supplied from the first fuel flow path 16 to the fuel tank 18 while the control for closing the on-off valve 20 is executed, the determination unit 46 performs the determination described below. That is, the determination unit 46 determines whether the on-off valve 20 is stuck in the open state based on whether the fuel pressure in the second fuel flow path 22 is excessively increased.

[0037] Figure 3 It is a line graph showing changes in the fuel pressure in the second fuel flow path 22 when the on-off valve 20 is normal. Figure 3The vertical axis represents the fuel pressure. Figure 3 The horizontal axis is the time axis.

[0038] 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 starts, the fuel pressure in the second fuel flow path 22 does not rise during the process of supplying fuel from the first fuel flow path 16 to the fuel tank 18. For example, Figure 3 The start time t0 and the end time t1 are shown. The start time t0 is the time when the fuel supply device 30 starts to supply fuel to the fuel tank 18. The end time t1 is the time when the fuel supply ends. Figure 3 As shown, 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.

[0039] Figure 4 It is a line graph showing the change in the fuel pressure in the second fuel flow path 22 when the on-off valve 20 is abnormal. Figure 4 Line chart format reference Figure 3 .

[0040] Even if a closing control signal is output from the switch valve control unit 44, the switch valve 20 stuck in the open state cannot be switched to the closed state in response to the closing control signal. Therefore, after the fuel supply device 30 starts to supply fuel to the fuel tank 18, a portion of the fuel supplied to the first fuel flow path 16 leaks to the second fuel flow path 22 through the switch valve 20. As a result, the fuel pressure in the second fuel flow path 22 rises excessively during the process of supplying fuel from the first fuel flow path 16 to the fuel tank 18. For example, Figure 3 Same, in Figure 4 The start time t0 and the end time t1 are shown in FIG. Figure 4 As shown, during the period from the start time t0 to the end time t1, the fuel pressure in the second fuel flow path 22 rises. By detecting this rise, the determination unit 46 can determine whether there is an abnormality in the switch valve 20. For example, when the increase amount Pup of the fuel pressure in the second fuel flow path 22 exceeds a predetermined increase amount threshold Th after the fuel supply to the fuel tank 18 is started, the determination unit 46 determines that the switch valve 20 is stuck in the open state. The increase amount threshold Th can be predetermined based on experiments, for example. The increase amount Pup can also be the increase amount of the fuel pressure per unit time.

[0041] The determination result determined by the determination unit 46 can be notified to the owner (driver) of the mobile body 10 through a notifying device (display, light, speaker, etc.) not shown in the figure, for example, of the mobile body 10, but the present invention is not limited thereto. For example, the determination result determined by the determination unit 46 can also be sent to a terminal device such as a smartphone held by a person who manages the mobile body 10, that is, a manager, through a network. In this way, the manager can be notified of the determination result determined by the determination unit 46 through the terminal device.

[0042] Figure 5 is a flowchart illustrating an abnormality detection method.

[0043] The control device 28 can execute Figure 5 The abnormality detection method can be executed by the operation unit 40 (processor) calculating and executing the program stored in the storage unit 38 (memory). The abnormality detection method includes a switch valve control step S1 and a determination step S2.

[0044] When fuel is supplied to the fuel tank 18 via the first fuel flow path 16, the on-off valve control step S1 is started. That is, for example, when the filling unit 14 is connected to the nozzle 30n, the on-off valve control step S1 is started. In the on-off valve control step S1, the on-off valve control unit 44 performs control for closing the on-off valve 20.

[0045] Next, the process proceeds to determination step S2, where the determination unit 46 determines whether the fuel pressure in the second fuel flow path 22 has excessively increased. Determination step S2 can be performed during the period when the fuel is supplied to the fuel tank 18 ( Figure 5 During the fuel supply period). 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 the fuel pressure in the second fuel flow path 22 has increased excessively based on the information acquired by the pressure information acquisition unit 42. In the case where the fuel pressure in the second fuel flow path 22 has increased excessively (S2: Yes), it is determined that there is an abnormality in the switch valve 20 (return: there is an abnormality). In the case where the fuel pressure in the second fuel flow path 22 has not increased excessively (S2: No), it is determined that there is no abnormality in the switch valve 20 (return: there is no abnormality).

[0046] so, Figure 5 The abnormality detection method ends. In addition, the determination result of the determination unit 46 can be notified to the owner (driver) of the mobile body 10 through a notifying device (not shown) possessed by the mobile body 10, for example, but the present invention is not limited to this.

[0047] According to the present embodiment, the control device 28 and the abnormality detection method can achieve the following effects.

[0048] In the present embodiment, in a state where control for closing the on-off valve 20 is executed, when fuel is supplied from the first fuel flow path 16 to the fuel tank 18, the determination unit 46 determines whether the fuel pressure of the second fuel flow path 22 has excessively increased. In this way, an abnormality of the on-off valve 20 can be detected without causing the fuel cell system 24 to consume fuel. That is, according to the control device 28, the fuel consumption can be suppressed.

[0049] When the increase amount Pup of the fuel pressure exceeds the predetermined increase amount threshold value Th, the determination unit 46 determines that there is an abnormality in the switch valve 20. Accordingly, only when the degree of change in the fuel pressure is significantly related to the abnormality detection of the switch valve 20, it is determined that there is an abnormality in the switch valve 20. Therefore, it is possible to suppress the erroneous detection of the abnormality of the switch valve 20.

[0050] In addition, as described above, the fuel supply system 12 may include a plurality of check valves 36. The plurality of check valves 36 prevent the fuel from flowing back from the fuel tank 18 to the first fuel flow path 16. Accordingly, when the on-off valve 20 is stuck in the open state, the fuel is easily leaked to the second fuel flow path 22 instead of the first fuel flow path 16. That is, the pressure sensor 26 is easily able to detect the increase in the fuel pressure in the second fuel flow path 22 caused by the abnormality of the on-off valve 20.

[0051] The fuel supply system 12 may include a second check valve 362 that prevents the fuel from flowing back from the fuel cell system 24 to the switch valve 20. Accordingly, when the switch valve 20 is stuck in the open state, the fuel pressure in the second fuel flow path 22 is likely to increase. As a result, the increase in the fuel pressure in the second fuel flow path 22 caused by the abnormality of the switch valve 20 is easily detected by the pressure sensor 26.

[0052] The second check valve 362 is preferably provided between the on-off valve 20 and the pressure sensor 26. Thus, when the on-off valve 20 is stuck in the open state, the pressure sensor 26 can easily detect the increase in the fuel pressure in the second fuel flow path 22.

[0053] The fuel supply system 12 may include a third check valve 363 that prevents the fuel from flowing back from the filling portion 14 to the fuel supply device 30. This allows the fuel supplied to the first fuel flow path 16 to flow reliably to the fuel tank 18. As a result, when the switch valve 20 is stuck in the open state, the fuel is more likely to leak to the second fuel flow path 22 rather than the first fuel flow path 16. That is, the increase in the fuel pressure in the second fuel flow path 22 caused by the abnormality of the switch valve 20 can be detected more easily by the pressure sensor 26.

[0054] One embodiment can be modified as follows. In the following modification examples, the description that overlaps with the embodiment is appropriately omitted. In addition, in the drawings used in the following modification examples, the same reference numerals are attached to the same structures as those described in the embodiment.

[0055] (Variant 1) The control device 28 may include a communicator (not shown) and transmit a signal indicating that the fuel supply device 30 is connected to the filling unit 14 from the fuel supply device 30 to the communicator. In this case, the switch valve control unit 44 can determine whether 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 switch valve control unit 44 can determine whether to start supplying fuel from the fuel supply device 30 to the fuel tank 18 based on the signal obtained from the fuel supply device 30.

[0056] The communication method between the fuel supply device 30 and the above-mentioned communicator is, for example, infrared communication, but is not limited to this.

[0057] (Variant 2) A signal indicating that fuel is being supplied from the fuel supply device 30 to the mobile body 10 (filling unit 14) may be transmitted from the fuel supply device 30 to the above-mentioned communicator (see Modification 1). In this case, the determination unit 46 can determine whether 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.

[0058] (Combination of multiple variations) The aforementioned multiple modified examples can be combined as appropriate within a range that does not conflict.

[0059] Regarding the above-mentioned embodiment, the following additional notes are also disclosed.

[0060] (Note 1) The control device (28) of the present invention is a control device for a fuel supply system (12), wherein the fuel supply system comprises a fuel tank (18) and a switch valve (20), wherein the fuel tank is used to store fuel supplied from a first fuel flow path (16); the switch valve is provided between a second fuel flow path (22) and the fuel tank, the second fuel flow path being used to supply the fuel to a fuel supply object that consumes the fuel stored in the fuel tank; the control device comprises a switch valve control unit (44) and a determination unit (46), wherein the switch valve control unit (44) performs control for closing the switch valve when the fuel is supplied from the first fuel flow path to the fuel tank; and the determination unit determines whether the switch valve is abnormal based on a pressure change 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 for closing the switch valve is performed. Thus, the fuel consumption consumed by abnormality detection of the switch valve can be suppressed.

[0061] (Note 2) According to the control device described in Supplementary Note 1, the determination unit may determine that the abnormality exists when the pressure increase (Pup) exceeds a predetermined increase threshold value (Th). This can suppress erroneous detection of an abnormality in the on-off valve.

[0062] (Note 3) The mobile body (10) of the present invention comprises the control device described in Supplement 1 or 2 and the fuel supply system. Thus, the fuel consumption consumed for abnormality detection of the switch valve of the mobile body can be suppressed. As a result, the increase in the fuel cost of the mobile body can be suppressed.

[0063] (Note 4) The mobile body according to Supplementary Note 3 may further include a first check valve (361) for preventing the fuel from flowing back from the fuel tank to the first fuel flow path. This makes it easy for the pressure sensor to detect a rise in fuel pressure in the second fuel flow path due to an abnormality in the switch valve. The mobile body is, for example, a vehicle such as an FCV.

[0064] (Note 5) The mobile body according to Supplementary Note 3 or 4 may further include a second check valve (362) for preventing the fuel from flowing back from the second fuel flow path to the fuel tank. This makes it easier for the pressure sensor to detect a rise in fuel pressure in the second fuel flow path due to an abnormality in the on-off valve.

[0065] (Note 6) The abnormality detection method of the present invention is executed by a computer and is used to detect an abnormality of a fuel supply system (12), wherein the fuel supply system has a fuel tank (18) and an on-off valve (20), wherein the fuel tank is used to store fuel supplied from a first fuel flow path (16); the on-off valve is provided between a second fuel flow path (22) and the fuel tank, and the second fuel flow path is used to supply the fuel to a fuel supply object that consumes the fuel stored in the fuel tank, and the abnormality detection method has an on-off valve control step (S1) and a determination step (S2), wherein in the on-off valve control step (S1), control for closing the on-off valve is performed when the fuel is supplied from the first fuel flow path to the fuel tank; and in the determination step (S2), whether the on-off valve has an abnormality is determined based on a pressure change 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 for closing the on-off valve is performed. Accordingly, the fuel consumption consumed by the abnormality detection of the on-off valve can be suppressed.

[0066] (Note 7) The program involved in the present invention is used to cause the computer to execute the abnormality detection method described in Supplementary Note 6.

[0067] In addition, the present invention is not limited to the above contents, and various structures can be adopted without departing from the gist of the present invention.

Claims

1. A control device, which is a control device for a fuel supply system, characterized in that: The fuel supply system comprises a fuel tank and a switching valve, wherein: The fuel tank is used to store the fuel supplied by the first fuel flow path; The on-off valve is provided between a second fuel flow path and the fuel tank, the second fuel flow path being used to supply the fuel to a fuel supply target that consumes the fuel stored in the fuel tank. The control device comprises a switch valve control unit and a determination unit, wherein: The on-off valve control unit performs control for closing the on-off valve when the fuel is supplied from the first fuel flow path to the fuel tank; The determination unit determines whether the on-off valve has an abnormality 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 for closing the on-off valve is performed.

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

3. A mobile body, characterized in that: A control device according to claim 1 and the fuel supply system.

4. The moving object according to claim 3, characterized in that: A first check valve is further provided for preventing the fuel from flowing back from the fuel tank to the first fuel flow path.

5. The moving body according to claim 3 or 4, characterized in that: A second check valve is further provided for preventing the fuel from flowing back from the second fuel flow path to the fuel tank.

6. An abnormality detection method, executed by a computer, for detecting abnormalities in a fuel supply system, characterized in that: The fuel supply system comprises a fuel tank and a switching valve, wherein: The fuel tank is used to store the fuel supplied by the first fuel flow path; The on-off valve is provided between a second fuel flow path and the fuel tank, the second fuel flow path being used to supply the fuel to a fuel supply target that consumes the fuel stored in the fuel tank. The abnormality detection method comprises a switch valve control step and a determination step, wherein: In the on-off valve control step, control for closing the on-off valve is performed when the fuel is supplied from the first fuel flow path to the fuel tank; In the determination step, whether or not the on-off valve has an abnormality is determined 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 for closing the on-off valve is performed.

7. A computer program product, characterized in that Used to cause the computer to execute the abnormality detection method according to claim 6.

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