Fuel leak diagnosis device and vehicle

Abstract

The application discloses a fuel leakage diagnosis device and a vehicle. The fuel leakage diagnosis device comprises an oil tank and a compressor, the compressor is selectively communicated with the oil tank, wherein the gas compressed by the compressor can be selectively delivered to the oil tank, and whether the oil tank has leakage is judged according to the change of the gas pressure in the oil tank. According to the fuel leakage diagnosis device, the gas is delivered into the oil tank through the compressor, and whether the oil tank has leakage is judged according to the change of the gas pressure in the oil tank, so that not only the influence of the rust problem of the fuel leakage diagnosis device caused by water vapor on the leakage diagnosis result is avoided, but also whether the oil tank has the fuel leakage problem can be accurately reflected, and the detection accuracy and stability of the fuel leakage diagnosis device are improved.

Description

Technical Field

[0001] This application relates to the field of fuel leak diagnostic technology, and more specifically, to a fuel leak diagnostic device and a vehicle. Background Technology

[0002] In related technologies, fuel leak diagnostic devices often use changes in current to indicate the amount of fuel tank leakage. However, fuel leak diagnostic devices are often affected by water vapor, which causes them to rust. As a result, the detected current value cannot accurately reflect the current state of fuel tank leakage, thus reducing the accuracy of the fuel leak diagnostic device. Summary of the Invention

[0003] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, this application proposes a fuel leak diagnostic device, which helps to improve the accuracy and stability of fuel leak diagnostic devices.

[0004] This application also proposes a vehicle equipped with the aforementioned fuel leak diagnostic device.

[0005] A fuel leak diagnostic device according to an embodiment of this application includes a fuel tank and a compressor, wherein the compressor is selectively connected to the fuel tank, and the gas compressed by the compressor can be selectively delivered to the fuel tank, and the presence of a leak in the fuel tank is determined based on the change in gas pressure within the fuel tank.

[0006] According to the embodiment of this application, the fuel leak diagnosis device delivers gas to the fuel tank through a compressor and determines whether there is a leak in the fuel tank based on the change in gas pressure inside the fuel tank. This not only avoids the influence of water vapor rust on the leak diagnosis results of the fuel leak diagnosis device, but also accurately reflects whether there is a fuel leak in the fuel tank, thus improving the detection accuracy and stability of the fuel leak diagnosis device.

[0007] According to some embodiments of this application, the fuel leak diagnostic device further includes an air suspension structure, the compressor being selectively connected to the air suspension structure, and the gas compressed by the compressor being selectively delivered to the air suspension structure.

[0008] According to some embodiments of this application, the gas in the air suspension structure can be selectively delivered to the fuel tank, and the presence of a leak in the fuel tank can be determined based on changes in the gas pressure within the fuel tank.

[0009] According to some embodiments of this application, the air suspension structure includes an air spring and an air tank, wherein the gas compressed by the compressor can be selectively delivered to the air spring and / or the air tank, and the gas in the air spring and / or the air tank can be selectively delivered to the fuel tank.

[0010] According to some embodiments of this application, the oil tank is provided with an oil tank valve at the inlet and outlet. The oil tank valve is opened to supply gas into the oil tank. When the gas pressure in the oil tank reaches a calibrated value, the oil tank valve is closed. The presence of a leak in the oil tank is determined based on the change in the gas pressure in the oil tank.

[0011] According to some embodiments of this application, the fuel leak diagnostic device further includes a pressure detection unit for detecting the gas pressure inside the fuel tank.

[0012] According to some embodiments of this application, the fuel leak diagnostic device further includes a main line, a first branch line, and a second branch line. The compressor is disposed on the main line. The first branch line is selectively connected to the main line. Gas in the first branch line is used to flow to the fuel tank. The second branch line is selectively connected to the main line and selectively connected to the first branch line. The air suspension structure is disposed on the second branch line.

[0013] According to some embodiments of this application, the fuel leak diagnostic device further includes: an exhaust pipe, which is selectively connected to the first branch, and the gas discharged from the fuel tank is selectively discharged through the exhaust pipe.

[0014] According to some embodiments of this application, a main valve and a drying tank are provided on the main line. The main valve is located on the outlet side of the compressor and is used to control the opening and closing of the main line. The drying tank is located on the side of the main valve away from the compressor and is used to dry the gas discharged from the compressor.

[0015] According to some embodiments of this application, the fuel leak diagnostic device further includes a fuel tank pipeline, an adsorption tank, and a transition pipeline. The fuel tank is disposed on the fuel tank pipeline, one end of the transition pipeline is connected to the first branch, and the other end of the transition pipeline is connected to the fuel tank pipeline through the adsorption tank.

[0016] According to some embodiments of this application, the fuel leak diagnostic device further includes a pressure relief valve, which is disposed on the transition pipeline. The pressure relief valve is used at least to control the gas pressure difference between the transition pipeline and the fuel tank pipeline to not exceed a preset pressure value.

[0017] According to some embodiments of this application, the fuel leak diagnostic device further includes an exhaust pipe and an exhaust valve, the exhaust pipe being connected to the transition pipe, and the exhaust valve being disposed on the exhaust pipe for controlling the opening and closing of the exhaust pipe.

[0018] According to some embodiments of this application, the fuel leak diagnostic device further includes a negative pressure pipeline and a negative pressure control valve. One end of the negative pressure pipeline is connected to the fuel tank pipeline through the adsorption tank, and the other end of the negative pressure pipeline is adapted to connect to the intake manifold of the engine. The negative pressure control valve is disposed on the negative pressure pipeline and is used to control the on / off state of the negative pressure pipeline.

[0019] According to some embodiments of this application, the fuel leak diagnostic device further includes a liquid level detection unit, which is used to detect the position of the fuel in the fuel tank.

[0020] A vehicle according to another embodiment of this application includes the fuel leak diagnostic device described above.

[0021] According to another embodiment of the present application, the vehicle's fuel leak diagnostic device delivers gas to the fuel tank through a compressor and determines whether there is a leak in the fuel tank based on the change in gas pressure inside the fuel tank. This not only avoids the influence of water vapor rust on the leak diagnosis results of the fuel leak diagnostic device, but also accurately reflects whether there is a fuel leak in the fuel tank, thus improving the detection accuracy and stability of the fuel leak diagnostic device.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a fuel leak diagnostic device according to an embodiment of this application;

[0024] Figure 2 This is yet another schematic diagram of a fuel leak diagnostic device according to an embodiment of this application;

[0025] Figure 3 This is a schematic flowchart of a fuel leak diagnosis method according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram illustrating the pressure change over time in the fuel tank when using an inflation method according to an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram illustrating the pressure change over time in the oil tank when using a vacuum method according to an embodiment of the present invention.

[0028] Figure 6 This is a schematic flowchart of a fuel leak diagnosis method according to a specific embodiment of the present invention;

[0029] Figure 7 This is a system schematic diagram of an electronic device according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of a vehicle system according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of a vehicle according to an embodiment of this application.

[0032] Figure label:

[0033] Vehicle 100, Fuel Leak Diagnostic Device 10, Compressor Body Structure 101, Fuel Tank 1, Compressor 2, Air Suspension Structure 3, Air Spring 31, Air Tank 32, Fuel Tank Valve 41, Main Valve 42, Exhaust Valve 43, Negative Pressure Control Valve 44, First Valve 45, Air Spring Valve 46, Air Tank Valve 47, Pressure Detection Unit 51, Liquid Level Detection Unit 52, Main Line 61, First Branch Line 62, Second Branch Line 63, Fuel Tank Pipeline 64, Transition Pipeline 65, Exhaust Pipeline 66, Negative Pressure Pipeline 67, Dryer 71, Adsorption Tank 72, Pressure Limiting Overflow Valve 8, Intake Manifold 9. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0035] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] The following is combined with Figures 1-9 This application describes in detail a fuel leak diagnostic device 10 and a vehicle 100 having the fuel leak diagnostic device 10 according to embodiments thereof.

[0037] Reference Figure 1 , Figure 2 As shown, the fuel leak diagnosis device 10 according to an embodiment of this application includes a fuel tank 1 and a compressor 2. The compressor 2 is selectively connected to the fuel tank 1, wherein the gas compressed by the compressor 2 can be selectively delivered to the fuel tank 1, and the presence of a leak in the fuel tank 1 is determined based on the change in gas pressure within the fuel tank 1.

[0038] Specifically, when compressor 2 is connected to fuel tank 1, the gas compressed by compressor 2 can be delivered to fuel tank 1; when compressor 2 is not connected to fuel tank 1, the gas compressed by compressor 2 cannot be delivered to fuel tank 1. Selective connection between compressor 2 and fuel tank 1 can be achieved by opening and closing valves. By delivering gas to fuel tank 1 and judging whether there is a leak in fuel tank 1 based on the gas pressure change, this not only avoids the influence of water vapor rust on the leak diagnosis results of the fuel leak diagnosis device 10, but also reduces interference from the external environment. It can accurately reflect whether there is a fuel leak in fuel tank 1, effectively reducing false judgments and improving the detection accuracy and stability of the fuel leak diagnosis device 10. At the same time, the fuel leak diagnosis device 10 can also simultaneously perform daily fuel tank 1 pressure monitoring. The fuel leak diagnosis device 10 has a relatively simple structure and a straightforward operation process, lowering the operational threshold for the structure of the fuel leak diagnosis device 10, improving detection efficiency, and contributing to increased production efficiency.

[0039] In some embodiments, the compressor 2 is connected to the oil tank 1, and the gas compressed by the compressor 2 is delivered to the oil tank 1. After the gas pressure in the oil tank 1 reaches a stable calibrated value, the gas delivery is stopped. After a period of stillness, the gas pressure drop value in the oil tank 1 is recorded. A standard pressure drop value is preset. If the pressure drop value is greater than the standard pressure drop value, it indicates that there is a leak in the oil tank 1, and the oil tank 1 does not meet the national safety standards. If the pressure drop value is not greater than the standard pressure drop value, it indicates that the oil tank 1 has good sealing performance, and the oil tank 1 meets the national safety standards and can be used normally.

[0040] In some embodiments, the compressor 2 is connected to the oil tank 1, and the gas compressed by the compressor 2 is delivered to the oil tank 1. After the gas pressure in the oil tank 1 reaches a stable calibrated value, the gas delivery is stopped, and the tank remains still for a period of time. The pressure drop value of the oil tank 1 at each interval during this time is recorded. Each cycle has a preset standard pressure drop value. If the pressure drop value in any cycle is greater than the corresponding standard pressure drop value, it indicates that there is a leak in the oil tank 1. If the pressure drop value in all cycles is not greater than the corresponding standard pressure drop value, it indicates that the oil tank 1 has good sealing performance and can be used normally.

[0041] In related technologies, fuel leak diagnostic devices often use changes in current to indicate the amount of fuel tank leakage. However, fuel leak diagnostic devices are often affected by water vapor, which causes them to rust. As a result, the detected current value cannot accurately reflect the current state of fuel tank leakage, thus reducing the accuracy of the fuel leak diagnostic device.

[0042] According to the embodiment of this application, the fuel leak diagnosis device 10 delivers gas to the fuel tank 1 through the compressor 2, and determines whether there is a leak in the fuel tank 1 based on the change in gas pressure in the fuel tank 1. This not only avoids the influence of water vapor rust on the leak diagnosis results of the fuel leak diagnosis device 10, but also accurately reflects whether there is a fuel leak in the fuel tank 1, thus improving the detection accuracy and stability of the fuel leak diagnosis device 10.

[0043] In some embodiments of this application, see Figure 1 , Figure 2 As shown, the fuel leak diagnostic device 10 also includes an air suspension structure 3. The compressor 2 is selectively connected to the air suspension structure 3, and the gas compressed by the compressor 2 can be selectively delivered to the air suspension structure 3. Specifically, when the compressor 2 is connected to the air suspension structure 3, the gas compressed by the compressor 2 can be delivered to the air suspension structure 3; when the compressor 2 is not connected to the air suspension structure 3, the gas compressed by the compressor 2 cannot be delivered to the air suspension structure 3. The selective connection between the compressor 2 and the air suspension structure 3 can be achieved by opening and closing a valve. By integrating the fuel leak diagnostic function and the gas supply function of the air suspension structure 3 into one device, selective gas delivery to both can be achieved through the compressor 2, reducing the overall number of devices, reducing costs, and improving the utilization rate of the compressor 2. Therefore, compressed gas can be delivered to the fuel tank 1 using the air suspension structure 3.

[0044] In some embodiments of this application, see Figure 1 , Figure 2 As shown, the gas in the air suspension structure 3 can be selectively delivered to the fuel tank 1, and the presence of a leak in the fuel tank 1 can be determined based on changes in the gas pressure within the fuel tank 1. Specifically, the pressure difference between the air suspension structure 3 and the fuel tank 1 allows gas to enter the fuel tank 1 without the compressor 2 being started. The gas in the air suspension structure 3 is used to detect leaks in the fuel tank 1, reducing the operating time of the compressor 2 and enabling the reuse of the gas within the air suspension structure 3, thereby optimizing the overall energy consumption of the fuel leak diagnosis device 10. Specifically, selective connection between the air suspension structure 3 and the fuel tank 1 can be achieved by opening and closing a valve.

[0045] In some embodiments of this application, see Figure 1 , Figure 2As shown, the air suspension structure 3 includes an air spring 31 and an air tank 32. The gas compressed by the compressor 2 can be selectively delivered to the air spring 31 and / or the air tank 32, and the gas in the air spring 31 and / or the air tank 32 can be selectively delivered to the fuel tank 1. Specifically, by selectively delivering gas to the air spring 31 and the air tank 32 through the compressor 2, the fuel leak diagnostic device 10 can accurately allocate gas resources according to different operating conditions, realizing flexible allocation of gas resources within the fuel leak diagnostic device 10. The gas in the air spring 31 and the air tank 32 can also be selectively delivered to the fuel tank 1 to detect leaks in the fuel tank 1. This fully utilizes the existing gas resources in the air suspension structure 3, reduces energy consumption and resource waste, and makes efficient use of the gas within the entire fuel leak diagnostic device 10, thus optimizing the overall use of the fuel leak diagnostic device 10.

[0046] In some embodiments, the gas compressed by the compressor 2 can be selectively delivered to the air spring 31, and the gas in the air spring 31 can be selectively delivered to the oil tank 1.

[0047] In some embodiments, the gas compressed by the compressor 2 can be selectively delivered to the gas storage tank 32, and the gas in the gas storage tank 32 can be selectively delivered to the oil tank 1.

[0048] In some embodiments, the gas compressed by the compressor 2 can be selectively delivered to the air spring 31 and the air tank 32, and the gas in the air spring 31 and the air tank 32 can be selectively delivered to the oil tank 1.

[0049] In some embodiments of this application, see Figure 1 , Figure 2 As shown, tank valves 41 are installed at the inlet and outlet of tank 1. Opening valve 41 allows gas to be supplied into tank 1. When the gas pressure inside tank 1 reaches a calibrated value, valve 41 is closed. The presence of a leak in tank 1 is determined based on changes in gas pressure. Therefore, by installing tank valves 41 at the inlet and outlet of tank 1, precise control over the gas supply process can be achieved. Closing valve 41 when the gas pressure reaches the calibrated value ensures consistency in the initial gas state of tank 1 during each test, significantly improving the accuracy of leak detection. Simultaneously, the gas volume in tank 1 can be controlled in real time, ensuring that detection is conducted within a safe range.

[0050] In some embodiments of this application, see Figure 1 , Figure 2As shown, the fuel leak diagnostic device 10 also includes a pressure detection unit 51, which is used to detect the gas pressure inside the fuel tank 1. Therefore, the pressure detection unit 51 can measure the gas pressure inside the fuel tank 1 in real time and accurately, greatly improving the accuracy of fuel leak detection.

[0051] Optionally, the pressure detection unit 51 can be a pressure sensor, a liquid column pressure gauge, an elastic pressure gauge, etc.

[0052] In some embodiments of this application, see Figure 1 , Figure 2 As shown, the fuel leak diagnostic device 10 also includes a main circuit 61, a first branch circuit 62, and a second branch circuit 63. The compressor 2 is mounted on the main circuit 61. The first branch circuit 62 is selectively connected to the main circuit 61, and the gas in the first branch circuit 62 flows to the fuel tank 1. The second branch circuit 63 is selectively connected to the main circuit 61 and selectively connected to the first branch circuit 62. The air suspension structure 3 is mounted on the second branch circuit 63. Specifically, the design of the main circuit 61, the first branch circuit 62, and the second branch circuit 63 rationally divides the fuel leak diagnostic device 10 into zones. According to actual needs, the connection and disconnection between the main circuit and the branch circuits, and between different branch circuits, can be flexibly controlled to achieve multi-functional coordination, such as fuel tank 1 leak detection and air supply to the air suspension structure 3.

[0053] In some embodiments, see Figure 1 , Figure 2 As shown, a first valve 45 is provided on the first branch 62, and the first valve 45 is used to control the opening and closing of the first branch 62.

[0054] In some embodiments, see Figure 1 As shown, the second branch 63 has an air spring valve 46 and an air tank valve 47. The air spring valve 46 controls the opening and closing of the gas passage for the air spring 31, and the air tank valve 47 controls the opening and closing of the gas passage for the air tank 32. Alternatively, a main valve can be installed on the second branch 63 to control the opening and closing of the gas passage to the air spring valve 46 and the air tank valve 47.

[0055] In some embodiments of this application, see Figure 1 , Figure 2 As shown, the fuel leak diagnostic device 10 also includes an exhaust pipe 66, which is selectively connected to the first branch 62. Gas discharged from the fuel tank 1 is selectively discharged through the exhaust pipe 66. Thus, the selective connection between the exhaust pipe 66 and the first branch 62 allows the fuel leak diagnostic device 10 to flexibly select the gas discharge path according to actual conditions, improving the adaptability and practicality of the fuel leak diagnostic device 10.

[0056] In some embodiments of this application, see Figure 1 , Figure 2 As shown, the main circuit 61 is equipped with a main valve 42 and a dryer tank 71. The main valve 42 is located on the outlet side of the compressor 2 and is used to control the opening and closing of the main circuit 61. The dryer tank 71 is located on the side of the main valve 42 away from the compressor 2, i.e. Figure 1 As shown, the dryer 71 is located to the right of the main valve 42. The dryer 71 is used to dry the gas discharged from the compressor 2. Specifically, the main valve 42, located on the outlet side of the compressor 2, controls the on / off state of the main line 61, ensuring no gas leakage when no gas supply is needed. The dryer 71 dries the gas discharged from the compressor 2, preventing moisture in the gas from corroding the internal components of the fuel leak diagnostic device 10. It also reduces the interference of moisture on fuel leak detection, improving the accuracy and stability of the fuel leak diagnostic device 10, thereby extending its service life. Simultaneously, the dryer 71 dries the gas discharged from the compressor 2, ensuring the gas entering the air suspension structure 3 is relatively dry, preventing moisture in the gas from corroding the internal components of the air suspension structure 3, and preventing moisture from affecting the normal operation of the air suspension structure 3.

[0057] In some embodiments not shown in the figures, the drying tank 71 is positioned on the side of the main valve 42 closer to the compressor 2. In other words, as... Figure 1 As shown, the drying tank 71 is located to the left of the main valve 42.

[0058] In some embodiments, the compressor body structure 101 is composed of a compressor 2, a main valve 42 and a dryer 71, and the compressor body structure 101 provides gas to the oil tank 1.

[0059] In some embodiments of this application, see Figure 1 , Figure 2As shown, the fuel leak diagnostic device 10 also includes a fuel tank line 64, an adsorption tank 72, and a transition line 65. The fuel tank 1 is installed on the fuel tank line 64. One end of the transition line 65 is connected to the first branch line 62, and the other end of the transition line 65 is connected to the fuel tank line 64 through the adsorption tank 72. Specifically, by setting up the adsorption tank 72, the gas discharged from the fuel tank 1 can be purified as it passes through the adsorption tank 72, adsorbing the oil vapor in the gas and preventing the oil vapor from being emitted into the atmosphere or the intake manifold 9 of the engine, thus helping to improve air quality. When the compressor 2 or the air suspension structure 3 delivers gas into the fuel tank 1, the gas can backflush the adsorption tank 72, and the oil vapor adsorbed in the adsorption tank 72 re-enters the fuel tank 1 with the gas, which reduces fuel consumption to a certain extent and improves the fuel economy of the fuel leak diagnostic device 10. At the same time, it improves the backflush desorption efficiency of the adsorption tank 72 and extends the service life of the adsorption tank 72. In addition, backflushing the adsorption tank 72 reduces the amount of oil adsorbed on the adsorption tank 72, allowing the adsorption tank 72 to adsorb more oil when it is forward-flushed, thus improving the adsorption efficiency of the adsorption tank 72.

[0060] Optionally, the adsorption tank 72 can be a carbon tank, a graphene oxide tank, or other tank structures with oil adsorption capabilities.

[0061] In some embodiments, see Figure 1 As shown, the high-pressure gas inside the air suspension structure 3 (such as the air tank 32, air spring 31, etc.) serves as the air supply source for the fuel tank 1. When it is necessary to determine whether the fuel tank 1 is leaking, the air spring valve 46 and the air tank valve 47 are opened, the first valve 45 and the fuel tank valve 41 are opened simultaneously, and the exhaust valve 43 and the negative pressure control valve 44 are closed. Due to the pressure difference, the gas inside the air suspension structure 3 can backflush the adsorption tank 72 without starting the compressor 2, and finally enter the fuel tank 1 to complete the pressure detection.

[0062] In some embodiments of this application, see Figure 1 , Figure 2 As shown, the fuel leak diagnostic device 10 also includes a pressure relief valve 8, which is installed on the transition line 65. The pressure relief valve 8 is used to control the gas pressure difference between the transition line 65 and the fuel tank line 64 to not exceed a preset pressure value. Specifically, the pressure relief valve 8 ensures that the gas pressure difference between the transition line 65 and the fuel tank line 64 does not exceed the preset pressure value, preventing excessive gas from entering the fuel tank 1 due to an excessive pressure difference between the compressor 2 and the fuel tank 1. This reduces the risk of the fuel tank 1 rupturing or deforming due to excessive gas pressure caused by excessive gas, and improves the safety of the fuel leak diagnostic device 10.

[0063] In some embodiments of this application, see Figure 1 , Figure 2As shown, the fuel leak diagnostic device 10 also includes an exhaust pipe 66 and an exhaust valve 43. The exhaust pipe 66 is connected to a transition pipe 65, and the exhaust valve 43 is installed on the exhaust pipe 66. The exhaust valve 43 is used to control the opening and closing of the exhaust pipe 66. Specifically, by controlling the exhaust pipe 66, the transition pipe 65, and the fuel tank pipe 64 to form a passage, the gas in the fuel tank 1 can be discharged, avoiding residual gas from interfering with subsequent detections and improving the accuracy of the fuel leak diagnostic device 10 in detecting leaks in the fuel tank 1.

[0064] In some embodiments, the exhaust pipe 66 is also connected to the first branch 62.

[0065] In some embodiments of this application, see Figure 1 , Figure 2 As shown, the fuel leak diagnostic device 10 also includes a negative pressure line 67 and a negative pressure control valve 44. One end of the negative pressure line 67 is connected to the fuel tank line 64 via an adsorption tank 72, and the other end of the negative pressure line 67 is adapted to connect to the engine's intake manifold 9. The negative pressure control valve 44 is installed on the negative pressure line 67 and is used to control the opening and closing of the negative pressure line 67. Specifically, when both the negative pressure line 67 and the fuel tank line 64 are open, excess gas in the fuel tank 1 can directly enter the intake manifold 9 formed by engine startup under negative pressure, thereby participating in the engine's combustion process. This reduces the amount of gas emitted into the atmosphere by the fuel leak diagnostic device 10, helps reduce exhaust emissions and improves resource utilization.

[0066] In some embodiments of this application, see Figure 1 , Figure 2 As shown, the fuel leak diagnostic device 10 also includes a level detection unit 52, which is used to detect the fuel level in the fuel tank 1. Specifically, the level detection unit 52 can monitor the changes in the fuel level in the fuel tank 1 in real time. By combining the changes in the fuel level in the fuel tank 1 with changes in gas pressure, it can more accurately determine whether there is a fuel leak, thus improving the accuracy of the fuel leak diagnostic device 10. In addition, based on the fuel level in the fuel tank 1, the remaining space volume in the fuel tank 1 can be calculated, thereby determining the gas volume that the remaining space can hold.

[0067] Optionally, the liquid level detection unit 52 can be a liquid level sensor, a float-type liquid level gauge, a hydrostatic liquid level gauge, etc.

[0068] In some embodiments of this application, see Figure 1 , Figure 2 As shown, the fuel leak diagnostic device 10 can perform a variety of functions, including lifting with the air spring 31, inflating the air suspension structure 3 with the compressor 2, monitoring the pressure of the fuel tank 1, monitoring the level of the fuel tank 1, depressurizing the fuel tank 1, and diagnosing leaks in the fuel tank 1.

[0069] Specifically, compressor 2 starts and opens main valve 42, allowing gas to enter air suspension structure 3 (including components such as air spring 31 and air tank 32) through dryer 71, thus completing the lifting function of air spring 31 and air storage function of air tank 32. This achieves the functions of lifting air spring 31 and inflating air suspension structure 3 by compressor 2.

[0070] The pressure detection unit 51 inside oil tank 1 is activated to continuously monitor the pressure inside oil tank 1, and the liquid level detection unit 52 is activated to continuously monitor the height of the remaining oil in oil tank 1. This achieves the functions of monitoring the pressure and liquid level of oil tank 1.

[0071] When fuel is added to fuel tank 1 or the temperature rises, the pressure inside fuel tank 1 increases. The negative pressure control valve 44 is closed, the fuel tank valve 41 is opened, the first valve 45 is closed, and the exhaust valve 43 is opened. At this time, the gas inside fuel tank 1 can be adsorbed by the adsorption tank 72 and discharged from the fuel leak diagnosis device 10, thereby realizing the pressure relief function of fuel tank 1.

[0072] Compressor 2 starts, opens main valve 42, and simultaneously opens first valve 45 and fuel tank valve 41. Exhaust valve 43 and negative pressure control valve 44 are closed. Gas passes through pressure-limiting overflow valve 8, backflushes adsorption tank 72, and carries oil vapor from adsorption tank 72 into fuel tank 1. Data from pressure detection unit 51 and level detection unit 52 in fuel tank 1 are read, and the volume of gas entering fuel tank 1 is obtained through the pressure change data from pressure detection unit 51 and level detection unit 52. When the gas pressure in fuel tank 1 reaches the calibrated value, fuel tank valve 41 is closed. The change in gas pressure in fuel tank 1 is used to determine if there is a leak in fuel tank 1, thus realizing the fuel tank 1 leak diagnosis function. After the test is completed, fuel tank valve 41 and exhaust valve 43 are opened, and first valve 45 is closed to discharge excess gas from fuel tank 1. At this time, the fuel leak diagnosis device 10 completes one test cycle.

[0073] In some embodiments, the compressor 2 has different speeds to meet different air volume requirements. For example, the compressor 2 can be set to different speeds when supplying air to the air suspension structure 3 and the oil tank 1 to meet the different air volume requirements of the air suspension structure 3 and the oil tank 1.

[0074] In some embodiments, the opening degree of any one of the following valves—fuel tank valve 41, main valve 42, exhaust valve 43, negative pressure control valve 44, first valve 45, air spring valve 46, and air tank valve 47—is adjustable to regulate the flow path of the pipeline in which that valve is located. During fuel leak diagnosis, the negative pressure control valve 44 remains closed at all times.

[0075] Optionally, any one of the following valves may be a solenoid valve, a manual valve, etc.: oil tank valve 41, main valve 42, exhaust valve 43, negative pressure control valve 44, first valve 45, air spring valve 46, and air tank valve 47.

[0076] The following description, with reference to the accompanying drawings, outlines a fuel leak diagnosis method, apparatus, electronic device, vehicle, and storage medium according to embodiments of the present invention.

[0077] Figure 1 and Figure 2 This is a schematic diagram of a fuel leak diagnostic device according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, the fuel leak diagnosis device 10 includes a fuel tank 1 and an air supply device. The fuel tank 1 is suitable for holding fuel, and the air supply device is selectively connected to the fuel tank 1. The air supply device can selectively deliver compressed gas to the fuel tank 1 and determine whether there is a leak in the fuel tank 1 based on the gas pressure change in the fuel tank 1.

[0078] Specifically, when the gas supply device is connected to fuel tank 1, it can deliver compressed gas into fuel tank 1; when the gas supply device is not connected to fuel tank 1, it cannot deliver compressed gas into fuel tank 1. Selective connection between the gas supply device and fuel tank 1 can be achieved by opening and closing a valve. By supplying gas into fuel tank 1 and judging whether there is a fuel leak based on changes in gas pressure within fuel tank 1, the system not only avoids the impact of water vapor rust on the leak diagnosis results of the fuel leak diagnosis device 10, but also reduces interference from the external environment. It can accurately reflect whether there is a fuel leak in fuel tank 1, effectively reducing false positives and improving the detection accuracy and stability of the fuel leak diagnosis device 10. Simultaneously, the fuel leak diagnosis device 10 can also perform daily fuel tank 1 pressure monitoring. The fuel leak diagnosis device 10 has a relatively simple structure and a straightforward operation process, lowering the operational threshold for the device, improving detection efficiency, and contributing to increased production efficiency.

[0079] In some embodiments, the air supply device includes at least one of the following: compressor 2, air suspension structure 3, and pneumatic seat system (not shown).

[0080] by Figure 1 and Figure 2 As shown in the example, when the gas supply device is compressor 2, when compressor 2 is connected to oil tank 1, the gas compressed by compressor 2 can be delivered to oil tank 1; when compressor 2 is not connected to oil tank 1, the gas compressed by compressor 2 cannot be delivered to oil tank 1. Selective connection between compressor 2 and oil tank 1 can be achieved by opening and closing the valve.

[0081] It should be noted that the air supply principle of the pneumatic seat system is similar to that of the air suspension structure 3, so it will not be elaborated here.

[0082] Fuel leak diagnosis methods can be applied to, for example Figure 1 or Figure 2 In the fuel leak diagnostic device 10 shown, Figure 3 This is a schematic flowchart of a fuel leak diagnosis method according to an embodiment of the present invention, as shown below. Figure 3 As shown, fuel leak diagnosis methods include:

[0083] S201 controls the gas supply device to deliver compressed gas to the oil tank and obtains the gas pressure value in the oil tank.

[0084] Specifically, when the air supply device is a compressor, the compressor can be controlled to start, compress the air filtered by the air filter, and deliver the compressed clean air to the fuel tank. When the air supply device is an air suspension system or a pneumatic seat system, the air suspension system or pneumatic seat system can be controlled to deliver the compressed gas stored in the air tank to the fuel tank. The gas pressure in the fuel tank changes with the input of compressed gas, and the gas pressure can be detected by a pressure sensor.

[0085] In some embodiments, when employing, such as Figure 1 or Figure 2 When the fuel leak diagnostic device 10 shown is used, the fuel leak diagnostic device 10 also includes an adsorption tank 72, a first valve 45, a fuel tank valve 41, and an exhaust valve 43. One end of the first valve 45 is connected to the air supply device, and the other end of the first valve 45 is connected to one end of the fuel tank valve 41 through the adsorption tank 72. The other end of the fuel tank valve 41 is connected to the fuel tank 1. One end of the exhaust valve 43 is connected to one end of the fuel tank valve 41 through the adsorption tank 72. The exhaust valve 43 is adapted to adsorb the gas in the fuel tank 1 through the adsorption tank 72 and then discharge it. Controlling the air supply device to deliver compressed gas to the fuel tank 1 includes: controlling the air supply device to start, controlling the first valve 45 and the fuel tank valve 41 to open, and controlling the exhaust valve 43 to close, so as to deliver the compressed gas to the fuel tank 1 through the adsorption tank 72.

[0086] S202, determine whether fuel leakage has occurred in the fuel tank based on the change in gas pressure value.

[0087] Specifically, if the fuel tank has no leak hole, it is a closed space. If the fuel tank has a leak hole, gas will escape from it, causing a decrease in the gas pressure in the tank. Therefore, the magnitude of the gas pressure change when the fuel tank has no leak hole is different from the magnitude of the gas pressure change when the fuel tank has a leak hole. Thus, the magnitude of the gas pressure change can be used to determine whether there is a fuel leak in the fuel tank.

[0088] It should be noted that the fuel leak diagnosis method in this embodiment can be executed by the vehicle's central processing unit.

[0089] In the above embodiments, compressed gas is delivered to the fuel tank, and the fuel leak is determined based on the change in the gas pressure value in the fuel tank. This eliminates the need for complex functional relationships, resulting in higher accuracy in fuel leak diagnosis. Furthermore, the fuel leak diagnosis device is composed of existing components in the vehicle, eliminating the need for additional components and thus reducing the cost of fuel leak diagnosis.

[0090] In some embodiments, before determining whether fuel leakage has occurred in the fuel tank based on the magnitude of the change in gas pressure, the method further includes: when the gas pressure reaches a first preset pressure value, controlling the gas supply device to stop supplying compressed gas to the fuel tank; and when the gas supply device stops supplying compressed gas to the fuel tank for a first preset duration, determining the magnitude of the change in gas pressure.

[0091] Specifically, when the gas pressure reaches the first preset pressure value, it indicates that the air in the fuel tank has been fully inflated, and the gas supply device no longer needs to deliver compressed gas. Therefore, the gas supply device is controlled to stop delivering compressed gas to the fuel tank. The change in gas pressure is the absolute value of the difference between the gas pressure after a preset time and the first preset value. After the gas supply device stops delivering compressed gas to fuel tank 1, if the fuel tank has no leaks and is a closed space, the change in gas pressure after the preset time will be small; if the fuel tank has leaks, the gas pressure will drop significantly after the preset time. Therefore, the change in gas pressure can be used to determine whether fuel leakage has occurred in the fuel tank.

[0092] In adopting such Figure 1 or Figure 2 When the fuel leak diagnostic device 10 is used, the control gas supply device stops supplying compressed gas to the fuel tank 1, including: controlling the fuel tank valve 41 to close.

[0093] Specifically, when the gas pressure inside the oil tank 1 reaches the calibrated value, the oil tank valve 41 is closed, ensuring that the initial state of the gas inside the oil tank 1 is consistent each time a test is conducted, thereby significantly improving the accuracy of leak detection in the oil tank 1.

[0094] In some embodiments, determining whether fuel leakage has occurred in the fuel tank based on the magnitude of change in gas pressure includes: determining that there is no fuel leakage in the fuel tank when the magnitude of change in gas pressure is less than or equal to a preset magnitude of change; and determining that fuel leakage has occurred in the fuel tank when the magnitude of change in gas pressure is greater than the preset magnitude of change.

[0095] Understandably, if the change in gas pressure is less than or equal to the preset change range, it indicates that the change in gas pressure is small, and therefore, there is no fuel leakage in the fuel tank; if the change in gas pressure is greater than the preset change range, it indicates that the gas pressure has dropped significantly, and therefore, there is fuel leakage in the fuel tank.

[0096] In some embodiments, when the change in gas pressure exceeds a preset change range, the method further includes: determining whether the number of times the change in gas pressure exceeds the preset change range is greater than or equal to a preset number; if the number of times the change in gas pressure exceeds the preset change range is less than the preset number, controlling the gas in the fuel tank to be discharged, and controlling the gas supply device to deliver compressed gas to the fuel tank, so as to determine again whether the change in gas pressure exceeds the preset change range; if the number of times the change in gas pressure exceeds the preset change range is greater than or equal to the preset number, determining that fuel leakage has occurred in the fuel tank.

[0097] Specifically, gas pressure values ​​may fluctuate or err, leading to errors in the detection results. Therefore, fuel leak diagnosis needs to be repeated to improve the accuracy and reliability of the diagnosis. When the change in gas pressure exceeds a preset range, the number of tests is increased by one. If the number of tests is less than the preset number, the exhaust valve and fuel tank valve can be opened to expel the gas from the fuel tank through the carbon canister. Then, the gas supply device is controlled to refill the fuel tank, and the change in gas pressure is checked again to see if it exceeds the preset range. If the change in gas pressure is less than or equal to the preset range, no fuel leak is confirmed. If the change in gas pressure exceeds the preset range, the number of tests is increased by one, and the number of tests is checked again to see if it exceeds or equals the preset number. If the number of tests is greater than or equal to the preset number, a fuel leak is confirmed. If the number of tests is still less than the preset number, the gas in the fuel tank is expelled again, and the gas supply device is controlled to deliver compressed gas to the fuel tank.

[0098] In the above embodiments, multiple fuel leak detections are required. If the number of times the gas pressure change exceeds a preset range is greater than or equal to a preset number, a fuel tank leak is determined, thereby avoiding misjudgment and further improving the accuracy and reliability of fuel leak diagnosis.

[0099] In some embodiments, the fuel tank is provided with an exhaust valve (not shown) having a leakage hole (not shown), wherein the preset variation range is determined according to the following method: controlling the gas supply device to supply compressed gas to the fuel tank and obtaining the gas pressure value in the fuel tank; when the gas pressure value reaches a first preset pressure value, controlling the gas supply device to stop supplying compressed gas to the fuel tank and controlling the exhaust valve to open so that the gas in the fuel tank can be discharged; when the gas supply device stops supplying compressed gas to the fuel tank for a preset duration, determining the current variation range of the gas pressure value and using the current variation range as the preset variation range.

[0100] Specifically, the preset variation range can be obtained through calibration before fuel leak diagnosis or when the fuel tank is manufactured. During calibration, such as... Figure 4 As shown, the control gas supply device (e.g., compressor) starts and opens the gas supply control valve and the oil tank shut-off valve, allowing compressed gas to rush into the oil tank. When the gas pressure reaches the first preset pressure value P0, the oil tank shut-off valve is closed and the exhaust valve is opened. Because there is a leakage hole on the exhaust valve, gas will escape from the leakage hole. After a preset time, the gas pressure value at this time is obtained. The gas pressure value at this time is... Figure 4 P2 in the equation, and the absolute value of the difference between the gas pressure value P2 and the first preset pressure value P0 is taken as the preset change range.

[0101] Therefore, in the process of fuel leak diagnosis, it is assumed that the gas pressure value after a preset time is... Figure 4 If P1 is the value of P1, then the change range ΔP = |P1 - P0| ≤ |P2 - P0|, therefore, no leak occurred in the fuel tank; assuming the gas pressure after the preset time is... Figure 4 If P3 is the value of P3, then the change range ΔP = |P3-P0| > |P2-P0|, therefore, the fuel tank may leak.

[0102] In some embodiments, when multiple pressure detection points are provided in the fuel tank, obtaining the gas pressure value in the fuel tank includes: obtaining the pressure value detected by each pressure detection point; and taking the average of all pressure values ​​as the gas pressure value.

[0103] Specifically, multiple pressure detection points can be set at different locations inside the fuel tank. Each pressure detection point is equipped with a pressure sensor to monitor the gas pressure at different locations within the fuel tank in real time. Then, the sum of the pressure values ​​from all the pressure detection points is calculated, and the average of all the pressure values ​​is taken as the gas pressure value.

[0104] In the above embodiments, by setting multiple pressure detection points at different locations inside the fuel tank, the gas pressure values ​​at different locations inside the fuel tank can be detected, thereby further improving the accuracy of fuel leak diagnosis.

[0105] In some embodiments, after determining that fuel leakage has occurred in the fuel tank, the method further includes: determining the pressure change range at each pressure detection point based on the pressure value at each pressure detection point; and determining the location of the leak in the fuel tank based on the pressure change range at each pressure detection point.

[0106] Specifically, because pressure detection points are set at different locations in the fuel tank, after determining that a fuel leak has occurred, the leak location can be pinpointed based on the pressure change at each detection point. Gas leaks faster near the leak location, resulting in a significant pressure drop. Therefore, if the pressure at a particular detection point drops significantly, it indicates that the detection point is close to the leak location, thus allowing for the determination of the leak's location.

[0107] In the above embodiment, because multiple pressure detection points are set in the oil tank, the location of the leak can be accurately located based on the pressure value change of each pressure detection point.

[0108] In some embodiments, determining whether fuel leakage has occurred in the fuel tank based on the magnitude of change in gas pressure includes: acquiring fuel level information in the fuel tank; determining the gas leakage volume in the fuel tank based on the magnitude of change in gas pressure and the fuel level information; and determining whether fuel leakage has occurred in the fuel tank based on the gas leakage volume.

[0109] In other words, this invention is not limited to determining whether fuel is leaking from the tank based on changes in gas pressure; it can also calculate the volume of gas leakage based on liquid level information and gas pressure, and then determine whether fuel is leaking from the tank based on the volume of gas leakage. The fuel level information in the tank can be detected by a liquid level sensor in the tank.

[0110] Furthermore, in some embodiments, determining whether fuel leakage has occurred in the fuel tank based on the gas leakage volume includes: determining that there is no fuel leakage in the fuel tank when the gas leakage volume is less than or equal to a preset leakage volume; and determining that fuel leakage has occurred in the fuel tank when the gas leakage volume is greater than the preset leakage volume.

[0111] Understandably, when the gas leakage volume is less than or equal to the preset leakage volume, it indicates that the gas leakage is small, and therefore it can be determined that there is no fuel leakage in the fuel tank; when the change in gas pressure value is greater than the preset leakage volume, it indicates that the gas leakage is large, and therefore it can be determined that there is a fuel leakage in the fuel tank.

[0112] In some embodiments, the method further includes: controlling the gas supply device to extract gas from the fuel tank; controlling the gas supply device to stop extracting gas from the fuel tank when the gas pressure value reaches a second preset pressure value; and determining whether fuel leakage has occurred in the fuel tank based on the change range of the gas pressure value when the gas supply device stops extracting gas from the fuel tank for a preset duration.

[0113] Specifically, the gas supply device generates negative pressure during operation, which draws the gas in the fuel tank out through the carbon canister. If there is a leak in the fuel tank, gas will enter the fuel tank, and the gas pressure in the fuel tank will also change. Therefore, the present invention can also use the negative pressure generated by the gas supply device during operation to draw the gas out of the fuel tank, and determine whether the fuel in the fuel tank is leaking based on the change in gas pressure.

[0114] For example, in adopting such Figure 1 or Figure 2 When the fuel leak diagnostic device 10 is activated, the air supply device is started, and the first valve 45 and the fuel tank valve 41 are opened, while the exhaust valve 43 is closed. This utilizes the negative pressure generated by the air supply device to extract gas from the fuel tank 1 through the adsorption tank 72. Then, by acquiring the gas pressure value, the fuel tank valve 41 is closed when the gas pressure reaches a second preset pressure value. With the fuel tank valve 41 closed for a third preset duration, the absolute value of the difference between the gas pressure value after the third preset duration and the second preset pressure value is calculated to obtain the gas pressure change range. Based on the gas pressure change range, it is determined whether fuel leakage has occurred in the fuel tank 1. If the change range is less than or equal to the preset change range, it is determined that there is no fuel leakage in the fuel tank 1; if the change range is greater than the preset change range, it is determined that fuel leakage has occurred in the fuel tank 1. When the change range is greater than the preset change range, the gas pressure value can be measured multiple times to obtain a more accurate detection result.

[0115] It should be noted that the preset variation range when using air extraction to diagnose fuel leaks can also be obtained through calibration before fuel leak diagnosis or when the fuel tank is manufactured.

[0116] by Figure 5 As shown in the example, the second preset pressure value is P0'. Because there is a leak hole on the exhaust valve of the oil tank, gas will enter from the leak hole until a preset time is reached, at which point the gas pressure value is obtained. Figure 5 P2' in the equation, and the absolute value of the difference between the gas pressure value P2' and the second preset pressure value P0' is used as the preset variation range.

[0117] Therefore, in the process of fuel leak diagnosis, it is assumed that the gas pressure value after a preset time is... Figure 5If P1' is the value in the equation, then the change range ΔP' = |P1' - P0'| ≤ |P2' - P0'|, therefore, no leak occurred in the fuel tank; assuming the gas pressure after the preset time is... Figure 5 If P3' is in the equation, then the change range ΔP' = |P3'-P0'| > |P2'-P0'|, therefore, the fuel tank may leak.

[0118] The technical solution of this application is further described in detail below with reference to specific implementation methods:

[0119] like Figure 6 As shown, when using as Figure 1 or Figure 2 When the fuel leak diagnosis device 10 shown is used to diagnose fuel leaks by charging the fuel tank 1, the fuel leak diagnosis method includes the following steps:

[0120] S301, control the start of the air supply device and control the opening of the first valve 45 and the oil tank valve 41.

[0121] S302, control the exhaust valve 43 to close, so that the compressed gas is delivered to the oil tank 1 through the adsorption tank 72.

[0122] S303, obtain the gas pressure value in oil tank 1.

[0123] S304, determine whether the gas pressure value has reached the first preset pressure value. If yes, proceed to step S305; otherwise, return to step S301.

[0124] S305, control oil tank valve 41 to close.

[0125] S306, determine whether the oil tank valve 41 has been closed for a first preset time. If yes, proceed to step S307; otherwise, proceed to step S305.

[0126] S307, calculate the absolute value of the difference between the gas pressure value and the first preset pressure value to obtain the change range.

[0127] S308, determine whether the change range is less than or equal to the preset change range. If yes, proceed to step S309; ​​otherwise, proceed to step S310.

[0128] S309, confirming that there is no fuel leakage in fuel tank 1.

[0129] S310, increment the number of tests by 1.

[0130] S311, determine whether the number of detections is greater than or equal to the preset number. If yes, proceed to step S312; otherwise, proceed to step S314.

[0131] S312, It has been determined that there is a fuel leak in fuel tank 1.

[0132] S313, when there are multiple pressure detection points, the location of the leak is determined based on the change in pressure value at each pressure detection point.

[0133] S314, control the exhaust valve 43 to open so that the gas in the oil tank 1 is adsorbed by the adsorption tank 72 and discharged, and then return to step S301.

[0134] In summary, the fuel leak diagnosis method according to embodiments of the present invention controls an air supply device to deliver compressed gas to a fuel tank, acquires the gas pressure value inside the fuel tank, and determines whether fuel leakage has occurred in the fuel tank based on the change in the gas pressure value. The fuel leak diagnosis method is applied to a fuel leak diagnosis device, which includes a fuel tank and an air supply device. The fuel tank is suitable for holding fuel, and the air supply device is selectively connected to the fuel tank to deliver compressed gas to it. Therefore, by delivering compressed gas to the fuel tank and determining whether fuel leakage has occurred based on the change in the gas pressure value inside the tank, complex functional relationships are not required, thus avoiding the determination of multiple parameters and resulting in higher accuracy in fuel leak diagnosis.

[0135] Corresponding to the above embodiments, the present invention also proposes a computer-readable storage medium having a computer program stored thereon, which, when processed by a processor, executes the fuel leak diagnosis method as described in any of the foregoing embodiments.

[0136] According to the computer-readable storage medium of the present invention, the above-described fuel leak diagnosis method is implemented during execution. By supplying compressed gas into the fuel tank and determining whether there is a fuel leak in the fuel tank based on the change in the gas pressure value in the fuel tank, the method does not require the use of complex functional relationships, thus making the fuel leak diagnosis more accurate.

[0137] Corresponding to the above embodiments, the present invention also proposes an electronic device. For example... Figure 7 As shown, the electronic device 100 includes a memory 110, a processor 120, and a fuel leak diagnosis program stored in the memory 110 and executable on the processor 120. When the processor 120 executes the fuel leak diagnosis program, it implements the fuel leak diagnosis method of any of the foregoing embodiments.

[0138] According to the electronic device of the present invention, the above-described fuel leak diagnosis method is implemented by the processor. By supplying compressed gas into the fuel tank, the method determines whether there is a fuel leak in the fuel tank based on the change in the gas pressure value in the fuel tank. This eliminates the need for complex functional relationships and makes the fuel leak diagnosis more accurate.

[0139] Corresponding to the above embodiments, the present invention also proposes a fuel leak diagnostic device 10. For example... Figure 1 or Figure 2 As shown, the oil leak diagnosis device includes: oil tank 1, air supply device and controller (not shown).

[0140] The fuel tank 1 is suitable for holding fuel; the gas supply device is selectively connected to the fuel tank 1; the controller is configured to control the gas supply device to deliver compressed gas to the fuel tank 1, acquire the gas pressure value in the fuel tank 1, and determine whether fuel leakage has occurred in the fuel tank 1 based on the change in the gas pressure value.

[0141] In some embodiments, the fuel leak diagnostic device 10 further includes an adsorption tank 72, a first valve 45, a fuel tank valve 41, and an exhaust valve 43. One end of the first valve 45 is connected to an air supply device, and the other end of the first valve 45 is connected to one end of the fuel tank valve 41 through the adsorption tank 72. The other end of the fuel tank valve 41 is connected to the fuel tank 1. One end of the exhaust valve 43 is connected to one end of the fuel tank valve 41 through the adsorption tank 72. The exhaust valve 43 is adapted to adsorb and discharge the gas in the fuel tank 1 through the adsorption tank 72. The controller is also configured to control the start of the air supply device, control the opening of the first valve 45 and the fuel tank valve 41, and control the closing of the exhaust valve 43 to deliver the compressed gas to the fuel tank 1 through the adsorption tank 72.

[0142] In some embodiments, the controller is further configured to: control the gas supply device to stop supplying compressed gas to the fuel tank 1 before determining whether fuel leakage has occurred in the fuel tank 1 based on the magnitude of the change in gas pressure value, and when the gas pressure value reaches a first preset pressure value; and determine the magnitude of the change in gas pressure value when the gas supply device stops supplying compressed gas to the fuel tank 1 for a first preset duration.

[0143] In some embodiments, the controller is further configured to: determine that there is no fuel leakage in the fuel tank 1 when the change in gas pressure is less than or equal to a preset change range; and determine that there is fuel leakage in the fuel tank 1 when the change in gas pressure exceeds the preset change range.

[0144] In some embodiments, the controller is further configured to: determine whether the number of times the gas pressure value changes beyond the preset range is greater than or equal to a preset number when the gas pressure value changes beyond the preset range; if the number of times the gas pressure value changes beyond the preset range is less than the preset number, control the gas in the fuel tank 1 to be discharged, and control the gas supply device to supply compressed gas to the fuel tank 1, so as to determine again whether the gas pressure value changes beyond the preset range; if the number of times the gas pressure value changes beyond the preset range is greater than or equal to the preset number, determine that fuel leakage has occurred in the fuel tank 1.

[0145] In some embodiments, the oil tank 1 is provided with an exhaust valve 43, which has a leakage hole. The preset variation range is determined according to the following method: the gas supply device is controlled to supply compressed gas to the oil tank 1, and the gas pressure value in the oil tank 1 is obtained; when the gas pressure value reaches a first preset pressure value, the gas supply device is controlled to stop supplying compressed gas to the oil tank 1, and after a second preset time, the exhaust valve 43 is controlled to open so that the gas in the oil tank 1 can be discharged; when the gas supply device stops supplying compressed gas to the oil tank 1 and continues for a preset time, the current variation range of the gas pressure value is determined, and the current variation range is used as the preset variation range.

[0146] In some embodiments, the controller is further configured to: acquire the pressure value detected at each pressure detection point when multiple pressure detection points are provided in the oil tank 1; and take the average of all pressure values ​​as the gas pressure value.

[0147] In some embodiments, the controller is further configured to: after determining that fuel leakage has occurred in the fuel tank 1, determine the pressure change amplitude of each pressure detection point based on the pressure value of each pressure detection point; and determine the location of the leak in the fuel tank 1 based on the pressure change amplitude of each pressure detection point.

[0148] In some embodiments, the air supply device includes at least one of the following: compressor 2, air suspension structure 3, and pneumatic seat system.

[0149] In some embodiments, the controller is further configured to: acquire fuel level information in fuel tank 1; determine the gas leakage volume of fuel tank 1 based on the change in gas pressure value and the fuel level information; and determine whether fuel leakage has occurred in fuel tank 1 based on the gas leakage volume.

[0150] In some embodiments, the controller is further configured to: determine that there is no fuel leakage in the fuel tank 1 if the gas leakage volume is less than or equal to a preset leakage volume; and determine that there is fuel leakage in the fuel tank 1 if the gas leakage volume is a preset leakage volume.

[0151] In some embodiments, the controller is further configured to: control the gas supply device to extract gas from the fuel tank 1; control the gas supply device to stop extracting gas from the fuel tank 1 when the gas pressure value reaches a second preset pressure value; and determine whether fuel leakage has occurred in the fuel tank 1 based on the change range of the gas pressure value when the gas supply device stops extracting gas from the fuel tank 1 for a third preset duration.

[0152] It should be noted that for details not disclosed in the fuel leak diagnosis device of this embodiment, please refer to the details disclosed in the fuel leak diagnosis method of this embodiment, which will not be repeated here.

[0153] A fuel leak diagnosis device according to an embodiment of the present invention includes a fuel tank, an air supply device, and a controller. The fuel tank is suitable for holding fuel. The air supply device is selectively connected to the fuel tank to deliver compressed gas to the fuel tank. The controller controls the air supply device to deliver compressed gas to the fuel tank, acquires the gas pressure value inside the fuel tank, and, when the gas pressure value reaches a first preset pressure value, controls the air supply device to stop delivering compressed gas to the fuel tank. If the air supply device stops delivering compressed gas to the fuel tank for a preset duration, the controller determines whether fuel leakage has occurred in the fuel tank based on the change in gas pressure value. Therefore, by delivering compressed gas to the fuel tank and determining whether fuel leakage has occurred based on the change in gas pressure value inside the fuel tank, complex functional relationships are not required, thus avoiding the determination of multiple parameters and resulting in higher accuracy in fuel leak diagnosis.

[0154] See Figure 9 As shown, a vehicle 100 according to another embodiment of this application includes the fuel leak diagnostic device 10 described above.

[0155] According to another embodiment of the present application, the vehicle 100 has a fuel leak diagnosis device 10 that delivers gas to the fuel tank 1 through the compressor 2 and determines whether there is a leak in the fuel tank 1 based on the change in gas pressure in the fuel tank 1. This not only avoids the influence of water vapor rust on the leak diagnosis results of the fuel leak diagnosis device 10, but also accurately reflects whether there is a fuel leak in the fuel tank 1, thus improving the detection accuracy and stability of the fuel leak diagnosis device 10.

[0156] Corresponding to the above embodiments, the present invention also proposes a vehicle. For example... Figure 8 and Figure 9 As shown, the vehicle 100 includes the aforementioned electronic equipment 100.

[0157] According to the vehicle of the present invention, by employing the above-described electronic equipment or fuel leak diagnosis device, compressed gas is delivered into the fuel tank, and the fuel leak is determined based on the change in the gas pressure value in the fuel tank. This eliminates the need for complex functional relationships, thus improving the accuracy of fuel leak diagnosis.

[0158] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0159] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0160] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0161] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0162] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0163] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A fuel leak diagnostic device (10), characterized in that, include: Fuel tank (1); A compressor (2) is selectively connected to the oil tank (1); The gas compressed by the compressor (2) can be selectively delivered to the oil tank (1), and the presence of a leak in the oil tank (1) can be determined based on the change in gas pressure within the oil tank (1).

2. The fuel leak diagnostic device (10) according to claim 1, characterized in that, The fuel leak diagnostic device (10) also includes an air suspension structure (3), the compressor (2) is selectively connected to the air suspension structure (3), and the gas compressed by the compressor (2) can be selectively delivered to the air suspension structure (3).

3. The fuel leak diagnostic device (10) according to claim 2, characterized in that, The air suspension structure (3) can selectively deliver gas to the fuel tank (1), and determine whether there is a leak in the fuel tank (1) based on the gas pressure change in the fuel tank (1).

4. The fuel leak diagnostic device (10) according to claim 3, characterized in that, The air suspension structure (3) includes an air spring (31) and an air tank (32). The gas compressed by the compressor (2) can be selectively delivered to the air spring (31) and / or the air tank (32), and the gas in the air spring (31) and / or the air tank (32) can be selectively delivered to the fuel tank (1).

5. The fuel leak diagnostic device (10) according to any one of claims 1-4, characterized in that, The oil tank (1) is provided with an oil tank valve (41) at the inlet and outlet. The oil tank valve (41) is opened to supply gas into the oil tank (1). When the gas pressure in the oil tank (1) reaches the calibrated value, the oil tank valve (41) is closed. The oil tank (1) is judged to have a leak based on the change in gas pressure in the oil tank (1).

6. The fuel leak diagnostic device (10) according to any one of claims 1-4, characterized in that, The fuel leak diagnostic device (10) further includes a pressure detection unit (51) for detecting the gas pressure inside the fuel tank (1).

7. The fuel leak diagnostic device (10) according to claim 3 or 4, characterized in that, The fuel leak diagnostic device (10) also includes: Main road (61), on which the compressor (2) is mounted; The first branch (62) is selectively connected to the main road (61), and the gas in the first branch (62) is used to flow to the oil tank (1); The second branch road (63) is selectively connected to the main road (61) and selectively connected to the first branch road (62). The air suspension structure (3) is installed on the second branch road (63).

8. The fuel leak diagnostic device (10) according to claim 7, characterized in that, The fuel leak diagnostic device (10) further includes an exhaust pipe (66), which is selectively connected to the first branch (62), and the gas discharged from the fuel tank (1) is selectively discharged through the exhaust pipe (66).

9. The fuel leak diagnostic device (10) according to claim 7, characterized in that, The main road (61) is equipped with: The main valve (42) is located on the outlet side of the compressor (2) and is used to control the opening and closing of the main circuit (61). A drying tank (71) is disposed on the side of the main valve (42) away from the compressor (2), and the drying tank (71) is used to dry the gas discharged from the compressor (2).

10. The fuel leak diagnostic device (10) according to claim 7, characterized in that, The fuel leak diagnostic device (10) also includes: Fuel tank pipeline (64), wherein the fuel tank (1) is disposed on the fuel tank pipeline (64); Adsorption tank (72); A transition pipeline (65) is provided, one end of which is connected to the first branch (62), and the other end of which is connected to the oil tank pipeline (64) through the adsorption tank (72).

11. The fuel leak diagnostic device (10) according to claim 10, characterized in that, The fuel leak diagnostic device (10) further includes a pressure relief valve (8), which is installed on the transition pipeline (65). The pressure relief valve (8) is used to control the gas pressure difference between the transition pipeline (65) and the fuel tank pipeline (64) to not exceed a preset pressure value.

12. The fuel leak diagnostic device (10) according to claim 11, characterized in that, The fuel leak diagnostic device (10) also includes: An exhaust pipe (66) is connected to the transition pipe (65); An exhaust valve (43) is provided on the exhaust pipe (66) and is used to control the opening and closing of the exhaust pipe (66).

13. The fuel leak diagnostic device (10) according to claim 11, characterized in that, The fuel leak diagnostic device (10) also includes: A negative pressure pipeline (67) is provided, one end of which is connected to the oil tank pipeline (64) through the adsorption tank (72), and the other end of which is adapted to be connected to the intake manifold (9) of the engine. A negative pressure control valve (44) is provided on the negative pressure pipeline (67) and is used to control the opening and closing of the negative pressure pipeline (67).

14. The fuel leak diagnostic device (10) according to any one of claims 1-4, characterized in that, The fuel leak diagnostic device (10) further includes a liquid level detection unit (52), which is used to detect the position of the oil in the fuel tank (1).

15. A vehicle (100), characterized in that, Includes the fuel leak diagnostic device (10) according to any one of claims 1-14.

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