High-pressure oil tank system sealing detection method, controller, vehicle and medium

Abstract

The invention provides a high-pressure oil tank system sealing detection method, a controller, a vehicle and a medium, and the method comprises the steps: obtaining the first internal pressure of a high-pressure oil tank system when an isolation valve and a carbon tank solenoid valve are closed; if the first internal pressure of the high-pressure oil tank system is smaller than the first preset pressure threshold value or larger than the second preset pressure threshold value, it is determined that the sealing detection result of the high-pressure oil tank system is normal, and the first preset pressure threshold value is smaller than the second preset pressure threshold value. In the embodiment of the invention, when the isolating valve and the carbon tank electromagnetic valve of the high-pressure oil tank system are closed, the whole high-pressure oil tank system can be regarded as a high-pressure closed area, and the sealing detection result of the high-pressure oil tank system can be determined by obtaining the internal pressure of the high-pressure oil tank system and comparing the internal pressure with the preset pressure threshold value. Sensors do not need to be arranged in the high-pressure oil tank and the carbon tank respectively for sealing detection, the cost of the high-pressure oil tank system can be reduced, and the sealing detection process is simplified.

Description

Technical Field

[0001] This application relates to the field of vehicle fuel system technology, and in particular to a high-pressure fuel tank system sealing detection method, controller, vehicle and medium. Background Technology

[0002] In practical applications, plug-in hybrid electric vehicles (PHEVs), which have both a fuel engine and an electric motor as their power systems, typically use a high-pressure fuel tank system as their fuel supply system. Compared to a normal-pressure fuel tank, a high-pressure fuel tank can effectively seal fuel vapor inside the system when the engine is not in use for extended periods.

[0003] Specifically, a high-pressure fuel tank system typically includes a high-pressure fuel tank and a carbon canister. The high-pressure fuel tank and carbon canister are connected via pipelines and valves. Fuel vapor can move from the high-pressure fuel tank to the carbon canister through these pipelines and valves, where it is adsorbed by the activated carbon. To prevent fuel vapor leakage into the external environment, the high-pressure fuel tank system needs to be kept sealed.

[0004] However, in related technologies, the space inside the high-pressure oil tank is typically considered a high-pressure sealed area, while the space inside the carbon canister is considered a non-high-pressure sealed area. Therefore, it is necessary to disconnect the connection between the high-pressure oil tank and the carbon canister, install sensors in both the high-pressure oil tank and the carbon canister separately, and perform seal tests separately to determine the seal test results of the high-pressure oil tank system. This presents problems such as high cost of the high-pressure oil tank system and complex seal test procedures.

[0005] It should be noted that the information disclosed in the background section of this application is intended only to enhance the understanding of the general background of this application, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] This application provides a method for testing the sealing of a high-pressure oil tank system, a controller, a vehicle, and a medium, which helps to solve the problems of high cost and complex sealing process of high-pressure oil tank systems.

[0007] In a first aspect, embodiments of this application provide a method for testing the sealing of a high-pressure fuel tank system. The high-pressure fuel tank system includes a fuel tank, an isolation valve, a carbon canister, and a carbon canister solenoid valve. The fuel tank interface is connected to a first interface of the carbon canister, the carbon canister's second interface is connected to a first interface of the carbon canister solenoid valve, and the carbon canister's third interface is connected to a first interface of the isolation valve. The second interface of the isolation valve is used to connect to the external environment, and the second interface of the carbon canister solenoid valve is used to connect to an engine. The method includes: When the isolation valve is closed and the carbon canister solenoid valve is closed, the first internal pressure of the high-pressure oil tank system is obtained; If the first internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold or greater than the second preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal, and the first preset pressure threshold is less than the second preset pressure threshold.

[0008] In some possible implementations, after obtaining the first internal pressure of the high-pressure tank system, the method further includes: If the first internal pressure of the high-pressure oil tank system is greater than the first preset pressure threshold and less than the second preset pressure threshold, then after a first preset time, the second internal pressure of the high-pressure oil tank system is obtained. If the difference between the first internal pressure and the second internal pressure of the high-pressure oil tank system is greater than the first preset pressure change threshold, then the sealing test result of the high-pressure oil tank system is determined to be a fault.

[0009] In some possible implementations, after obtaining the first internal pressure of the high-pressure tank system, the method further includes: If the first internal pressure of the high-pressure oil tank system is greater than the first preset pressure threshold, less than the second preset pressure threshold, and the engine speed is greater than the preset speed threshold, then the carbon canister solenoid valve is opened, and the third internal pressure of the high-pressure oil tank system is obtained. If the third internal pressure of the high-pressure oil tank system is not within the preset pressure range, then the sensor status within the high-pressure oil tank system is determined to be faulty.

[0010] In some possible implementations, after obtaining the third internal pressure of the high-pressure tank system, the method further includes: If the third internal pressure of the high-pressure oil tank system is within the preset pressure range, then the carbon canister solenoid valve is closed, and after a second preset time, the fourth internal pressure of the high-pressure oil tank system is obtained. If the fourth internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal.

[0011] In some possible implementations, if the first internal pressure of the high-pressure oil tank system is less than a first preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal, including: If the first internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold, then the isolation valve is opened; After a third preset time period, the fifth internal pressure of the high-pressure oil tank system is obtained; If the difference between the first internal pressure and the fifth internal pressure of the high-pressure oil tank system is less than the second preset pressure change threshold, then the sensor status of the high-pressure oil tank system is determined to be faulty. If the difference between the first internal pressure and the fifth internal pressure of the high-pressure oil tank system is greater than the second preset pressure change threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal.

[0012] In some possible implementations, if the first internal pressure of the high-pressure oil tank system is greater than a second preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal, including: If the first internal pressure of the high-pressure oil tank system is greater than the second preset pressure threshold, then the carbon canister solenoid valve is opened. After a fourth preset time period, the sixth internal pressure of the high-pressure oil tank system is obtained; If the difference between the first internal pressure and the sixth internal pressure of the high-pressure oil tank system is less than the third preset pressure change threshold, then the sensor status of the high-pressure oil tank system is determined to be faulty. If the difference between the first internal pressure and the sixth internal pressure of the high-pressure oil tank system is greater than the third preset pressure change threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal.

[0013] In some possible implementations, prior to opening the carbon canister solenoid valve, the following is also included: Obtain the first air-fuel ratio in the engine; If the difference between the first internal pressure and the sixth internal pressure of the high-pressure oil tank system is greater than the third preset pressure change threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal, including: Obtain the second air-fuel ratio in the engine; If the difference between the first internal pressure and the sixth internal pressure of the high-pressure fuel tank system is greater than the third preset pressure change threshold, and the difference between the first air-fuel ratio and the second air-fuel ratio in the engine is greater than the preset air-fuel ratio change threshold, then the sealing test result of the high-pressure fuel tank system is determined to be normal.

[0014] Secondly, embodiments of this application also provide a controller configured to perform the method described in any one of the first aspects.

[0015] Thirdly, embodiments of this application also provide a vehicle, including: A high-pressure oil tank system and a controller, the controller being configured to perform the method described in any one of the first aspects.

[0016] Fourthly, embodiments of this application also provide a computer-readable storage medium, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform the method described in any one of the first aspects.

[0017] In this embodiment, when the isolation valve and the carbon canister solenoid valve of the high-pressure oil tank system are closed, the entire high-pressure oil tank system can be considered as a high-pressure sealed area. By acquiring the internal pressure of the high-pressure oil tank system and comparing it with a preset pressure threshold, the sealing test result of the high-pressure oil tank system can be determined. This eliminates the need to install sensors and perform sealing tests separately in the high-pressure oil tank and carbon canister, reducing the cost of the high-pressure oil tank system and simplifying the sealing test process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural diagram illustrating an application scenario provided in an embodiment of this application. Figure 2 This is a structural schematic diagram of a high-pressure oil tank system provided in related technologies; Figure 3 This is a schematic diagram of the structure of a high-pressure oil tank system provided in an embodiment of this application; Figure 4 A schematic flowchart illustrating the high-pressure oil tank system sealing detection method provided in this application embodiment; Figure 5 A schematic flowchart of another high-pressure oil tank system sealing detection method provided in this application embodiment; Figure 6 This is a flowchart illustrating another high-pressure oil tank system sealing detection method provided in an embodiment of this application. Detailed Implementation

[0020] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0021] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0022] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0024] In practical applications, plug-in hybrid electric vehicles (PHEVs), which have both a fuel engine and an electric motor as their power systems, typically use a high-pressure fuel tank system as their fuel supply system. Compared to a normal-pressure fuel tank, a high-pressure fuel tank can effectively seal fuel vapor inside the system when the engine is not in use for extended periods.

[0025] Specifically, a high-pressure fuel tank system typically includes a high-pressure fuel tank and a carbon canister. The high-pressure fuel tank and carbon canister are connected via pipelines and valves. Fuel vapor can move from the high-pressure fuel tank to the carbon canister through these pipelines and valves, where it is adsorbed by the activated carbon. To prevent fuel vapor leakage into the external environment, the high-pressure fuel tank system needs to be kept sealed.

[0026] See Figure 1 This is a structural diagram illustrating an application scenario provided in an embodiment of this application, such as... Figure 1 As shown, the vehicle 100 includes a high-pressure fuel tank system 101 and an engine 102. The high-pressure fuel tank system 101 includes a high-pressure fuel tank system 1011 and a carbon canister 1012. The high-pressure fuel tank system 1011 is connected to the carbon canister 1012, and the engine is connected to the carbon canister 1012 in the high-pressure fuel tank system 101.

[0027] Understandably, when the vehicle 100 is idle for an extended period or the engine 102 is not in use for a long time, a large amount of liquid fuel in the high-pressure fuel tank will evaporate into fuel vapor. This fuel vapor can move from the high-pressure fuel tank system 1011 to the carbon canister 1012 and be adsorbed by the activated carbon in the carbon canister 1012. When the engine 102 is running, the fuel vapor adsorbed in the carbon canister 1012 can be desorbed and absorbed and burned by the engine 102.

[0028] It should be pointed out that, such as Figure 1The vehicles 100 shown include, but are not limited to, plug-in hybrid electric vehicles (PHEVs), non-plug-in hybrid electric vehicles (HEVs), and gasoline-powered vehicles; meanwhile, such as Figure 1 The application scenario shown is only one exemplary application scenario. Those skilled in the art can also apply the embodiments of this application to application scenarios with other structures according to the actual situation.

[0029] The following section uses a high-pressure oil tank system provided in related technologies as an example to provide a detailed description of the high-pressure oil tank system.

[0030] See Figure 2 This is a structural schematic diagram of a high-pressure oil tank system provided in related technologies, such as... Figure 2 As shown, in the high-pressure oil tank system 200 of the related art, the interface of the high-pressure oil tank 201 is connected to the first interface of the vent valve 2012, the second interface of the vent valve 2012 is connected to the first interface of the isolation valve 203 through the first pipeline 205, the second interface of the isolation valve 203 is connected to the first interface of the carbon canister 202 through the second pipeline 206, the second interface of the carbon canister 202 is connected to the first interface of the carbon canister solenoid valve 204 through the third pipeline 207, and the third interface of the carbon canister is connected to the first interface of the carbon canister shut-off valve 2022.

[0031] The second port of the carbon canister shut-off valve 2022 is used to connect to the external environment, and the second port of the carbon canister solenoid valve 204 is used to connect to the engine. Meanwhile, a first pressure sensor 2011 and a second pressure sensor 2021 are respectively installed in the high-pressure oil tank 201 and the carbon canister 202, which can be used to collect the internal pressure between the high-pressure oil tank 201 and the carbon canister 202.

[0032] It should be noted that the vent valve 2012 is usually used to be in the closed state when the vehicle tilts or rolls over, so as to shut off the connection between the first port of the high-pressure fuel tank 201 and the first port of the isolation valve 203 to prevent liquid fuel leakage. When the vehicle is working normally, the vent valve 2012 is usually in the open state, and fuel vapor can flow out from the first port of the high-pressure fuel tank 201, and move to the carbon canister 202 in sequence through the vent valve 2012, the first pipeline 205, the isolation valve 203 and the second pipeline 206.

[0033] In practical applications, when a vehicle is idle for an extended period or the engine is not used for a long time, the high-pressure fuel tank system 200 in the relevant technology can be used to adsorb fuel vapor. Specifically, the carbon canister solenoid valve 204 and the carbon canister shut-off valve 2022 are closed, and the isolation valve 203 is opened. In this way, the fuel vapor generated in the high-pressure fuel tank 201 can enter the carbon canister 202 through the vent valve 2012, the first pipeline 205, the isolation valve 203, and the second pipeline 206, and be adsorbed and stored by the activated carbon therein, thereby preventing fuel vapor from leaking into the external environment.

[0034] When the engine is running, the high-pressure fuel tank system 200 in the related technology can open the canister solenoid valve 204 and the canister shut-off valve 2022. This allows the vacuum generated in the engine intake manifold to draw outside air into the canister 202 via the canister shut-off valve 2022 and the third interface of the canister 202. This airflow passes through the activated carbon bed, desorbing the adsorbed fuel vapor from the activated carbon, and then enters the engine through the third line 207 and the canister solenoid valve 204 to participate in combustion.

[0035] When refueling the high-pressure fuel tank 201, the carbon canister solenoid valve 204 can be closed, and the isolation valve 203 and the carbon canister shut-off valve 2022 can be opened. In this way, the gas in the high-pressure fuel tank system 200 in the related technology can be adsorbed by the carbon canister 202 and discharged to the atmosphere through the carbon canister shut-off valve 2022 to balance the pressure in the system.

[0036] However, in related technologies, the space inside the high-pressure oil tank is typically considered a high-pressure sealed area, while the space inside the carbon canister is considered a non-high-pressure sealed area. Therefore, it is necessary to disconnect the connection between the high-pressure oil tank and the carbon canister, install sensors in both the tank and the canister separately, and perform seal tests separately to determine the seal test results of the high-pressure oil tank system. This presents problems such as high cost of the high-pressure oil tank system and complex seal test procedures.

[0037] like Figure 2 As shown, the space within the high-pressure oil tank 201 is typically considered a high-pressure sealed area, while the space within the carbon canister 202 is considered a non-high-pressure sealed area. During sealing testing, the isolation valve 203, carbon canister solenoid valve 204, and carbon canister shut-off valve 2022 are usually closed. In this related technology, the high-pressure oil tank system 200 is divided into two independent sealed spaces: the high-pressure oil tank 201 and the carbon canister 202. Pressure changes can then be monitored using a first pressure sensor 2011 and a second pressure sensor 2021, respectively, to ultimately determine the sealing test result of the high-pressure oil tank system. The use of two pressure sensors increases the cost of the high-pressure oil tank system and complicates the sealing test process.

[0038] In view of this, this application provides a method for sealing testing of a high-pressure oil tank system, a controller, a vehicle, and a medium, which helps to solve the problems of high cost and complex sealing testing process of high-pressure oil tank systems.

[0039] The high-pressure oil tank system in the embodiments of this application will be described below.

[0040] In this embodiment, the high-pressure fuel tank system includes a high-pressure fuel tank, an isolation valve, a carbon canister, and a carbon canister solenoid valve. The interface of the high-pressure fuel tank is connected to the first interface of the carbon canister, the second interface of the carbon canister is connected to the first interface of the carbon canister solenoid valve, and the third interface of the carbon canister is connected to the first interface of the isolation valve. The second interface of the isolation valve is used to connect to the external environment, and the second interface of the carbon canister solenoid valve is used to connect to the engine.

[0041] In some possible implementations, the interface of the high-pressure oil tank is connected to the first interface of the carbon canister, including the interface of the high-pressure oil tank being connected to the first interface of the vent valve, and the second interface of the vent valve being connected to the first interface of the carbon canister.

[0042] The following describes the high-pressure oil tank system in this application embodiment in detail, taking an exemplary high-pressure oil tank system as an example.

[0043] See Figure 3 This is a structural schematic diagram of a high-pressure oil tank system provided in an embodiment of this application, as shown below. Figure 3 As shown, in the high-pressure oil tank system 300, the interface of the high-pressure oil tank 301 is connected to the first interface of the vent valve 3012, the second interface of the vent valve 3012 is connected to the first interface of the carbon canister 302 through the first pipeline 305, the second interface of the carbon canister 302 is connected to the first interface of the carbon canister solenoid valve 304 through the third pipeline 307, and the third interface of the carbon canister 302 is connected to the first interface of the isolation valve 303 through the second pipeline 306.

[0044] In this embodiment, the second port of the isolation valve 303 is used to connect to the external environment, and the second port of the carbon canister solenoid valve 304 is used to connect to the engine. Meanwhile, a pressure sensor 3011 is installed inside the high-pressure fuel tank 301, which can be used to collect the internal pressure of the high-pressure fuel tank system 300.

[0045] It should be noted that the vent valve 3012 is usually used to be in the closed state when the vehicle tilts or rolls over, so as to shut off the connection between the first port of the high-pressure fuel tank 301 and the first port of the carbon canister 302 to prevent liquid fuel leakage. When the vehicle is working normally, the vent valve 3012 is usually in the open state, and fuel vapor can flow out from the first port of the high-pressure fuel tank 301 and move to the carbon canister 302 in sequence through the vent valve 3012 and the first pipeline 305.

[0046] In this embodiment, when the vehicle is stationary for a long time or the engine is not used for a long time, the high-pressure fuel tank system 300 can be used to adsorb fuel vapor. Specifically, by closing the carbon canister solenoid valve 304 and the isolation valve 303, the fuel vapor generated in the high-pressure fuel tank 301 can enter the carbon canister 302 through the vent valve 3012 and the first pipeline 305, and be adsorbed and stored by the activated carbon therein, thereby preventing fuel vapor from leaking into the external environment.

[0047] In some possible implementations, when the engine is running, the carbon canister solenoid valve 304 and the isolation valve 303 can be opened. This allows outside air to be drawn into the carbon canister 302 via the isolation valve 303 and the second line 306 when a vacuum is generated in the engine intake manifold. This airflow passes through the activated carbon bed, desorbing the adsorbed fuel vapors from the activated carbon, and then enters the engine for combustion via the third line 307 and the carbon canister solenoid valve 304.

[0048] In some possible implementations, when fuel is being added to the high-pressure fuel tank 301, the isolation valve 303 can also be opened. In this way, the gas in the high-pressure fuel tank system 300 can be adsorbed by the carbon canister 302 and then discharged to the atmosphere through the isolation valve 303 to balance the pressure in the system.

[0049] In this embodiment, when the isolation valve 303 and the carbon canister solenoid valve 304 of the high-pressure oil tank system 300 are closed, the high-pressure oil tank system 300 as a whole can be regarded as a high-pressure sealed area, and the internal pressure of the high-pressure oil tank system 300 can be obtained by the pressure sensor 3011 for sealing detection.

[0050] Of course, those skilled in the art can also adjust parts or the entire structure to determine other high-pressure oil tank systems according to actual needs without creative effort. For example, the pressure sensor can also be adjusted to be inside the carbon canister. That is to say, such as Figure 3 The high-pressure oil tank system shown is merely an exemplary structure and should not be considered as a limitation of this application.

[0051] The following describes the high-pressure oil tank system sealing test method provided in the embodiments of this application.

[0052] See Figure 4 This is a flowchart illustrating a high-pressure oil tank system sealing detection method provided in an embodiment of this application, which can be applied to... Figure 1 The application scenarios shown are as follows: Figure 4 As shown, the method specifically includes the following steps.

[0053] S401: When the isolation valve and the carbon canister solenoid valve are closed, obtain the first internal pressure of the high-pressure oil tank system.

[0054] Understandably, the seal test aims to evaluate the airtightness of the high-pressure fuel tank system. Therefore, the test process typically needs to be conducted under conditions where there is no gas exchange between the high-pressure fuel tank system and the outside environment. In this embodiment, this can be achieved by closing the isolation valve and the canister purge solenoid valve, thus preventing gas exchange between the high-pressure fuel tank system and the outside environment. For example, the isolation valve and the canister purge solenoid valve can be closed by a controller. When both the isolation valve and the canister purge solenoid valve are closed, the connection between the high-pressure fuel tank system and the external environment or engine is severed. In this way, there is no gas exchange between the high-pressure fuel tank system and the outside environment, allowing for a seal test.

[0055] Simultaneously, the interface of the high-pressure oil tank is connected to the first interface of the carbon canister, meaning that the high-pressure oil tank and the carbon canister can be considered as a connected, sealed area. Furthermore, the internal pressure of this entire sealed space can be obtained; for example, this can be achieved using a pressure sensor installed inside the high-pressure oil tank or the carbon canister.

[0056] In some possible implementations, when the isolation valve and the carbon canister solenoid valve are closed, the first internal pressure of the high-pressure oil tank system can be obtained by acquiring the internal pressure of the sealed space, i.e., the first internal pressure, through a pressure sensor installed inside the high-pressure oil tank or the carbon canister, after a certain period of time when the isolation valve and the carbon canister solenoid valve are closed.

[0057] S402: If the first internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold or greater than the second preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal.

[0058] It is understood that after obtaining the first internal pressure of the high-pressure oil tank system, the sealing status of the high-pressure oil tank system can be judged by the first internal pressure. In the embodiments of this application, a first preset pressure threshold and a second preset pressure threshold can be set respectively, and the sealing status of the high-pressure oil tank system can be judged by the numerical relationship between the first internal pressure, the first preset pressure threshold, and the second preset pressure threshold, wherein the first preset pressure threshold is less than the second preset pressure threshold.

[0059] Specifically, when the first internal pressure is less than the first preset pressure threshold or greater than the second preset pressure threshold, the high-pressure oil tank system can be considered to be in a normal sealing state.

[0060] Understandably, when a high-pressure oil tank system is poorly sealed and leaks, the internal pressure may gradually approach atmospheric pressure due to gas exchange with the external environment. Therefore, in the event of a leak, the initial internal pressure is usually in a mid-range close to atmospheric pressure.

[0061] Conversely, when the high-pressure fuel tank system is well-sealed, its internal pressure may deviate from atmospheric pressure due to factors such as changes in ambient temperature, fuel consumption, and fuel evaporation, and remain within a certain pressure range. For example, when the high-pressure fuel tank system is well-sealed, fuel evaporation may cause the internal pressure to remain above a certain pressure threshold, while high-load engine operation and rapid fuel consumption may cause the internal pressure to remain below another preset pressure threshold.

[0062] In this way, a first preset pressure threshold and a second preset pressure threshold can be set based on the atmospheric pressure of the external environment, the parameters of the vehicle or high-pressure fuel tank, and / or the ambient temperature, to determine the sealing status of the high-pressure fuel tank system. For example, the first preset pressure threshold can be set to 0.95 standard atmospheres, and the second preset pressure threshold can be set to 1.1 standard atmospheres. Of course, those skilled in the art can also adjust the first preset pressure threshold and the second preset pressure threshold to be higher or lower according to actual needs.

[0063] In this way, if the first internal pressure is less than the first preset pressure threshold or greater than the second preset pressure threshold, it can be considered that there is no significant gas exchange between the high-pressure oil tank system and the external environment, and thus the sealing test result of the high-pressure oil tank system can be determined to be normal.

[0064] In practical applications, the internal pressure of the high-pressure oil tank system during sealing may happen to be greater than the first preset pressure threshold and less than the second preset pressure threshold, which may lead to inaccurate sealing test results of the high-pressure oil tank system.

[0065] See Figure 5 This is a flowchart illustrating another high-pressure oil tank system sealing detection method provided in an embodiment of this application, as shown below. Figure 5 As shown, in Figure 4 Following step S401, the following steps are also included.

[0066] S501: If the first internal pressure of the high-pressure oil tank system is greater than the first preset pressure threshold and less than the second preset pressure threshold, then after the first preset time, the second internal pressure of the high-pressure oil tank system is obtained.

[0067] It is understandable that the internal pressure obtained when the high-pressure oil tank system is sealed, i.e., the first internal pressure of the high-pressure oil tank system, may fall exactly between the first preset pressure threshold and the second preset pressure threshold. In this case, it may be difficult to directly determine whether the high-pressure oil tank system is in a sealed state or has a leak based solely on the first internal pressure, the first preset pressure threshold, and the second preset pressure threshold, leading to inaccurate sealing test results.

[0068] In this embodiment, after a first preset time period, the internal pressure of the high-pressure oil tank system, i.e., the second internal pressure, can be obtained again by a pressure sensor installed inside the high-pressure oil tank or the carbon canister. It is understood that since the isolation valve or the carbon canister solenoid valve is not operated, the high-pressure oil tank system can be considered to remain in a sealed state during the first preset time period. The first preset time period can be set by those skilled in the art according to actual needs.

[0069] S502: If the difference between the first internal pressure and the second internal pressure of the high-pressure oil tank system is greater than the first preset pressure change threshold, then the sealing test result of the high-pressure oil tank system is determined to be a fault.

[0070] In this embodiment, the sealing status of the high-pressure oil tank system can be determined based on the first internal pressure and the second internal pressure. Specifically, a first preset pressure change threshold can be set. If the difference between the first internal pressure and the second internal pressure of the high-pressure oil tank system is greater than the first preset pressure change threshold, the sealing test result of the high-pressure oil tank system is determined to be a fault.

[0071] Understandably, when the high-pressure oil tank system is well-sealed, its internal pressure typically remains relatively stable within a first preset time interval, or only changes regularly with factors such as ambient temperature. In other words, the change in internal pressure is usually less than the first preset pressure change threshold. Therefore, if the difference between the first and second internal pressures of the high-pressure oil tank system is less than the first preset pressure change threshold, the system can be considered well-sealed, and the sealing test result is deemed normal.

[0072] Conversely, when the high-pressure oil tank system is poorly sealed and leaks, within a first preset time interval, the internal pressure of the high-pressure oil tank system may change greater than a first preset pressure change threshold due to gas exchange with the external environment. Therefore, if the difference between the first internal pressure and the second internal pressure of the high-pressure oil tank system is greater than the first preset pressure change threshold, it can be considered that the high-pressure oil tank system is poorly sealed and leaking, and the sealing test result of the high-pressure oil tank system is determined to be a fault.

[0073] In some possible implementations, the sealing status of the high-pressure oil tank system can also be judged based on the first internal pressure, the second internal pressure, and the first preset time. Specifically, the first pressure change is determined based on the difference between the first internal pressure and the second internal pressure of the high-pressure oil tank system. If the ratio of the first pressure change to the first preset time is greater than the first preset gas change rate threshold, then the sealing detection result of the high-pressure oil tank system is determined to be a fault.

[0074] In some possible implementations, a leakage alarm signal can be triggered after the sealing test result of the high-pressure fuel tank system is determined to be faulty. Specifically, if the sealing test result of the high-pressure fuel tank system is determined to be faulty, a corresponding leakage alarm signal can be generated by the controller. Furthermore, the leakage alarm signal can be sent to the vehicle's infotainment system or uploaded to a cloud platform via a wireless network to provide an alert regarding the vehicle's fault status.

[0075] In practical applications, factors such as pressure sensor malfunction may cause the acquired internal pressure to fail to accurately reflect the internal state of the high-pressure oil tank system, thus affecting the sealing test results. In some possible implementations, the sensor's state can be determined based on the initial internal pressure of the high-pressure oil tank system.

[0076] See Figure 6 This is a flowchart illustrating another high-pressure oil tank system sealing detection method provided in an embodiment of this application, as shown below. Figure 6 As shown, in Figure 4 Following step S401, the following steps are also included.

[0077] S6011: If the first internal pressure of the high-pressure fuel tank system is greater than the first preset pressure threshold, less than the second preset pressure threshold, and the engine speed is greater than the preset speed threshold, then the carbon canister solenoid valve is opened, and the third internal pressure of the high-pressure fuel tank system is obtained.

[0078] In this embodiment, the state of the pressure sensor can be detected by opening the carbon canister solenoid valve in certain states. Specifically, when the first internal pressure of the high-pressure fuel tank system is greater than a first preset pressure threshold, less than a second preset pressure threshold, and the engine speed is greater than a preset speed threshold, the carbon canister solenoid valve can be opened, and the internal pressure of the high-pressure fuel tank system can be acquired again, i.e., the third internal pressure. The state of the pressure sensor is then detected based on the third internal pressure of the high-pressure fuel tank system.

[0079] It's understandable that an engine speed exceeding a preset threshold usually indicates that the engine is running and can generate a relatively stable vacuum. At this time, fuel vapor in the high-pressure fuel tank system can be drawn into the engine to participate in combustion, thus causing a corresponding change in the internal pressure of the high-pressure fuel tank system. Therefore, the state of the pressure sensor can be detected based on the internal pressure of the high-pressure fuel tank system after the carbon canister solenoid valve is opened.

[0080] S6012: If the third internal pressure of the high-pressure oil tank system is not within the preset pressure range, then the sensor status in the high-pressure oil tank system is determined to be faulty.

[0081] In this embodiment, the state of the pressure sensor can be determined based on the relationship between the third internal pressure and the preset pressure range. Specifically, if the third internal pressure of the high-pressure oil tank system does not fall within the preset pressure range, the sensor in the high-pressure oil tank system can be determined to be faulty.

[0082] Understandably, when the engine speed exceeds a preset speed threshold and the carbon canister solenoid valve opens, the high-pressure fuel tank system connects to the engine's vacuum source. Consequently, the internal pressure of the high-pressure fuel tank system typically decreases due to the suction effect of the engine's intake manifold, entering a predictable pressure range—the preset pressure range. Therefore, if the internal pressure is not within this preset pressure range, it usually indicates that the pressure sensor's measurement fails to accurately reflect the actual pressure changes in the system. This suggests a fault in the pressure sensor itself, thus confirming a malfunction in the high-pressure fuel tank system's sensor status.

[0083] Of course, those skilled in the art can set a preset pressure range according to actual conditions to describe the reasonable pressure range in the high-pressure fuel tank system when the carbon canister solenoid valve is opened when the engine speed is greater than a preset speed threshold.

[0084] S6021: If the third internal pressure of the high-pressure oil tank system is within the preset pressure range, then close the carbon canister solenoid valve and obtain the fourth internal pressure of the high-pressure oil tank system after the second preset time.

[0085] It is understandable that if the third internal pressure of the high-pressure oil tank system is within the preset pressure range, it can be assumed that the pressure sensor in the high-pressure oil tank system is working normally, and then the internal pressure of the high-pressure oil tank system can be obtained again after the second preset time, that is, the fourth internal pressure.

[0086] Specifically, the high-pressure oil tank system can be restored to a sealed state by closing the carbon canister solenoid valve via the controller. Subsequently, after a second preset time, the internal pressure of the high-pressure oil tank system, i.e., the fourth internal pressure, is obtained again through the pressure sensor in the high-pressure oil tank or carbon canister that has undergone state detection, providing a basis for subsequent sealing performance assessment. The second preset time can be set by those skilled in the art according to actual conditions.

[0087] S6022: If the fourth internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal.

[0088] Similarly, in this embodiment, the sealing status of the high-pressure oil tank system can be determined based on the fourth internal pressure of the high-pressure oil tank system. Specifically, in this embodiment, the sealing status of the high-pressure oil tank system can be determined by the numerical relationship between the fourth internal pressure of the high-pressure oil tank system and the first preset pressure threshold. If the fourth internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold, the sealing test result of the high-pressure oil tank system can be determined to be normal.

[0089] Understandably, before acquiring the fourth internal pressure, the high-pressure fuel tank system undergoes a process of opening and closing the canister purge valve when the engine speed exceeds a preset speed threshold. During this process, the engine's suction effect typically lowers the internal pressure of the high-pressure fuel tank system. After the canister purge valve closes and the high-pressure fuel tank system returns to a sealed state, if its sealing is good, the internal pressure will usually remain at this low level and will not rise due to gas exchange with the outside. Therefore, if the fourth internal pressure of the high-pressure fuel tank system is less than the first preset pressure threshold, the sealing test result of the high-pressure fuel tank system is determined to be normal.

[0090] In practical applications, the initial internal pressure may be obtained from a faulty sensor, failing to accurately reflect the internal condition of the high-pressure tank system. Therefore, in some possible implementations, such as... Figure 4 In step S402, if the first internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold, the sealing test result of the high-pressure oil tank system is determined to be normal. This can specifically include the following steps: if the first internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold, the isolation valve is opened; after a third preset time, the fifth internal pressure of the high-pressure oil tank system is obtained; if the difference between the first internal pressure and the fifth internal pressure of the high-pressure oil tank system is less than the second preset pressure change threshold, the sensor status of the high-pressure oil tank system is determined to be faulty; if the difference between the first internal pressure and the fifth internal pressure of the high-pressure oil tank system is greater than the second preset pressure change threshold, the sealing test result of the high-pressure oil tank system is determined to be normal.

[0091] It is understandable that if the first internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold, and the first internal pressure can truly reflect the internal condition of the high-pressure oil tank system, then the sealing test result of the high-pressure oil tank system can be determined to be normal.

[0092] In this embodiment, after acquiring the first internal pressure, if the first internal pressure of the high-pressure oil tank system is less than a first preset pressure threshold, the state of the pressure sensor can be detected based on the action of opening the isolation valve. Specifically, the isolation valve can be opened by the controller, and after a third preset time period of opening the carbon canister solenoid valve, the internal pressure of the high-pressure oil tank system can be acquired again by the sensor, i.e., the fifth internal pressure. The third preset time period can be set by those skilled in the art according to actual conditions.

[0093] It is understandable that when the high-pressure oil tank system is in a sealed state and the internal pressure is low, opening the isolation valve connecting to the external environment will usually draw air from the external environment into the high-pressure oil tank system, causing the internal pressure of the high-pressure oil tank system to rise.

[0094] Therefore, if the difference between the first internal pressure and the fifth internal pressure of the high-pressure oil tank system is less than the second preset pressure change threshold, the sensor status of the high-pressure oil tank system can be considered faulty. Consequently, the first and fifth internal pressures obtained by the sensors may not accurately reflect the internal condition of the high-pressure oil tank system, and the sealing test result of the high-pressure oil tank system cannot be determined based on the first internal pressure. The second preset pressure change threshold can be set by those skilled in the art according to actual conditions.

[0095] In some possible implementations, a sensor fault alarm signal can be triggered after determining that the sensor status of the high-pressure fuel tank system is faulty. Specifically, if a sensor status of the high-pressure fuel tank system is determined to be faulty, a corresponding sensor fault alarm signal can be generated by the controller. Furthermore, the sensor fault alarm can be sent to the vehicle's infotainment system or uploaded to a cloud platform via a wireless network to provide notification of vehicle malfunctions.

[0096] Conversely, if the difference between the first and fifth internal pressures of the high-pressure oil tank system is greater than the second preset pressure change threshold, it can be considered that the sensor can normally detect the pressure change caused by opening the isolation valve, meaning the sensor is considered to be functioning normally. Therefore, the first internal pressure obtained by the sensor can be considered to accurately reflect the internal condition of the high-pressure oil tank system, and since the first internal pressure is less than the first preset pressure threshold, the sealing test result of the high-pressure oil tank system can be determined to be normal.

[0097] In practical applications, the initial internal pressure may be obtained from a faulty sensor, failing to accurately reflect the internal condition of the high-pressure tank system. Therefore, in some possible implementations, such as... Figure 4The step S402 shown, "If the first internal pressure of the high-pressure oil tank system is greater than the second preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal," can specifically include the following steps: If the first internal pressure of the high-pressure oil tank system is greater than the second preset pressure threshold, then the carbon canister solenoid valve is opened; after a fourth preset time, the sixth internal pressure of the high-pressure oil tank system is obtained; if the difference between the first internal pressure and the sixth internal pressure of the high-pressure oil tank system is less than the third preset pressure change threshold, then the sensor status of the high-pressure oil tank system is determined to be faulty; if the difference between the first internal pressure and the sixth internal pressure of the high-pressure oil tank system is greater than the third preset pressure change threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal.

[0098] It is understandable that if the first internal pressure of the high-pressure oil tank system is greater than the second preset pressure threshold, and the first internal pressure can truly reflect the internal condition of the high-pressure oil tank system, then the sealing test result of the high-pressure oil tank system can be determined to be normal.

[0099] In this embodiment, after acquiring the first internal pressure, if the first internal pressure of the high-pressure oil tank system is greater than the second preset pressure threshold, the state of the pressure sensor can be detected based on the action of opening the carbon canister solenoid valve. Specifically, the carbon canister solenoid valve can be opened by the controller, and after a fourth preset time period after opening the carbon canister solenoid valve, the internal pressure of the high-pressure oil tank system can be acquired again by the sensor, i.e., the sixth internal pressure. The fourth preset time period can be set by those skilled in the art according to actual conditions.

[0100] It is understandable that when the high-pressure fuel tank system is in a sealed state and the internal pressure is high, opening the carbon canister solenoid valve connected to the engine intake manifold will cause the vacuum generated by the engine to draw in the gas in the high-pressure fuel tank system, resulting in a drop in the internal pressure of the high-pressure fuel tank system.

[0101] Therefore, if the difference between the first internal pressure and the sixth internal pressure of the high-pressure oil tank system is less than the third preset pressure change threshold, the sensor status of the high-pressure oil tank system can be considered faulty. Consequently, the first and sixth internal pressures obtained by the sensors may not accurately reflect the internal condition of the high-pressure oil tank system, and the sealing test result of the high-pressure oil tank system cannot be determined based on the first internal pressure. The third preset pressure change threshold can be set by those skilled in the art according to the actual situation.

[0102] In some possible implementations, a sensor fault alarm signal can be triggered after determining that the sensor status of the high-pressure fuel tank system is faulty. Specifically, if a sensor status of the high-pressure fuel tank system is determined to be faulty, a corresponding sensor fault alarm signal can be generated by the controller. Furthermore, the sensor fault alarm can be sent to the vehicle's infotainment system or uploaded to a cloud platform via a wireless network to provide notification of vehicle malfunctions.

[0103] Conversely, if the difference between the first and sixth internal pressures of the high-pressure oil tank system is greater than the third preset pressure change threshold, it can be considered that the sensor can normally detect the pressure change caused by opening the carbon canister solenoid valve, meaning the sensor is considered to be functioning normally. Therefore, the first internal pressure obtained by the sensor can be considered to accurately reflect the internal condition of the high-pressure oil tank system, and since the first internal pressure is greater than the second preset pressure threshold, the sealing test result of the high-pressure oil tank system can be determined to be normal.

[0104] In some possible implementations, to further improve the accuracy of the seal detection results, the engine air-fuel ratio can be introduced as an auxiliary judgment criterion. Before opening the carbon canister solenoid valve, the first air-fuel ratio in the engine can also be obtained. In this way, if the difference between the first internal pressure and the sixth internal pressure of the high-pressure fuel tank system is greater than the third preset pressure change threshold, then the seal detection result of the high-pressure fuel tank system is determined to be normal. This can specifically include: obtaining the second air-fuel ratio in the engine; if the difference between the first internal pressure and the sixth internal pressure of the high-pressure fuel tank system is greater than the third preset pressure change threshold, and the difference between the first air-fuel ratio and the second air-fuel ratio in the engine is greater than the preset air-fuel ratio change threshold, then the seal detection result of the high-pressure fuel tank system is determined to be normal.

[0105] Understandably, if the high-pressure fuel tank system is well-sealed and contains fuel vapor, opening the carbon canister solenoid valve will draw fuel vapor into the engine, thus affecting the engine's air-fuel ratio. Therefore, monitoring changes in the air-fuel ratio can be used as an auxiliary criterion to further improve the accuracy of seal testing results.

[0106] Specifically, the air-fuel ratio in the engine (first air-fuel ratio) can be obtained before opening the carbon canister solenoid valve. After obtaining the sixth internal pressure of the high-pressure fuel tank system, the air-fuel ratio in the engine (second air-fuel ratio) can be obtained again. If the difference between the first and sixth internal pressures of the high-pressure fuel tank system is greater than a third preset pressure change threshold, and the difference between the first and second air-fuel ratios in the engine is greater than a preset air-fuel ratio change threshold, then the sealing test result of the high-pressure fuel tank system is determined to be normal. The preset air-fuel ratio change threshold can be set by those skilled in the art according to actual conditions.

[0107] Corresponding to the above embodiments, this application also provides a controller, which is configured to execute the method described in any one of the method embodiments.

[0108] For details regarding the embodiments of this application, please refer to the description of the above method embodiments. For the sake of brevity, these details will not be repeated here.

[0109] Corresponding to the above embodiments, this application also provides a vehicle, the vehicle including a controller and a high-pressure fuel tank system, the controller being configured to execute the method described in any one of the method embodiments.

[0110] For details regarding the embodiments of this application, please refer to the description of the above method embodiments. For the sake of brevity, these details will not be repeated here.

[0111] Corresponding to the above embodiments, this application also provides a computer-readable storage medium, wherein the computer-readable storage medium may store a program, and when the program runs, it can control the device where the computer-readable storage medium is located to execute some or all of the steps in the above method embodiments. In specific implementation, the computer-readable storage medium may be a magnetic disk, an optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0112] For details regarding the embodiments of this application, please refer to the description of the above method embodiments. For the sake of brevity, these details will not be repeated here.

[0113] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, the simultaneous existence of A and B, or the existence of B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0114] Those skilled in the art will recognize that the units and algorithm steps described in the embodiments disclosed herein can be implemented using electronic hardware, computer software, or a combination of electronic hardware and software. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0115] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the above-described apparatus, controller, and computer storage medium can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0116] In the several embodiments provided in this application, any function, if implemented as a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0117] The above description is merely a specific embodiment of this application. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application. The protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A method for testing the sealing of a high-pressure oil tank system, characterized in that, The high-pressure fuel tank system includes a high-pressure fuel tank, an isolation valve, a carbon canister, and a carbon canister solenoid valve. The interface of the high-pressure fuel tank is connected to a first interface of the carbon canister. The second interface of the carbon canister is connected to a first interface of the carbon canister solenoid valve. The third interface of the carbon canister is connected to a first interface of the isolation valve. The second interface of the isolation valve is used to connect to the external environment. The second interface of the carbon canister solenoid valve is used to connect to the engine. The method includes: When the isolation valve is closed and the carbon canister solenoid valve is closed, the first internal pressure of the high-pressure oil tank system is obtained; If the first internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold or greater than the second preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal, and the first preset pressure threshold is less than the second preset pressure threshold.

2. The method according to claim 1, characterized in that, After obtaining the first internal pressure of the high-pressure oil tank system, the method further includes: If the first internal pressure of the high-pressure oil tank system is greater than the first preset pressure threshold and less than the second preset pressure threshold, then after a first preset time, the second internal pressure of the high-pressure oil tank system is obtained. If the difference between the first internal pressure and the second internal pressure of the high-pressure oil tank system is greater than the first preset pressure change threshold, then the sealing test result of the high-pressure oil tank system is determined to be a fault.

3. The method according to claim 1, characterized in that, After obtaining the first internal pressure of the high-pressure oil tank system, the method further includes: If the first internal pressure of the high-pressure oil tank system is greater than the first preset pressure threshold, less than the second preset pressure threshold, and the engine speed is greater than the preset speed threshold, then the carbon canister solenoid valve is opened, and the third internal pressure of the high-pressure oil tank system is obtained. If the third internal pressure of the high-pressure oil tank system is not within the preset pressure range, then the sensor status within the high-pressure oil tank system is determined to be faulty.

4. The method according to claim 3, characterized in that, After obtaining the third internal pressure of the high-pressure oil tank system, the method further includes: If the third internal pressure of the high-pressure oil tank system is within the preset pressure range, then the carbon canister solenoid valve is closed, and after a second preset time, the fourth internal pressure of the high-pressure oil tank system is obtained. If the fourth internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal.

5. The method according to claim 1, characterized in that, If the first internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal, including: If the first internal pressure of the high-pressure oil tank system is less than the first preset pressure threshold, then the isolation valve is opened; After a third preset time period, the fifth internal pressure of the high-pressure oil tank system is obtained; If the difference between the first internal pressure and the fifth internal pressure of the high-pressure oil tank system is less than the second preset pressure change threshold, then the sensor status of the high-pressure oil tank system is determined to be faulty. If the difference between the first internal pressure and the fifth internal pressure of the high-pressure oil tank system is greater than the second preset pressure change threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal.

6. The method according to claim 1, characterized in that, If the first internal pressure of the high-pressure oil tank system is greater than the second preset pressure threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal, including: If the first internal pressure of the high-pressure oil tank system is greater than the second preset pressure threshold, then the carbon canister solenoid valve is opened. After a fourth preset time period, the sixth internal pressure of the high-pressure oil tank system is obtained; If the difference between the first internal pressure and the sixth internal pressure of the high-pressure oil tank system is less than the third preset pressure change threshold, then the sensor status of the high-pressure oil tank system is determined to be faulty. If the difference between the first internal pressure and the sixth internal pressure of the high-pressure oil tank system is greater than the third preset pressure change threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal.

7. The method according to claim 6, characterized in that, Before opening the carbon canister solenoid valve, the following is also included: Obtain the first air-fuel ratio in the engine; If the difference between the first internal pressure and the sixth internal pressure of the high-pressure oil tank system is greater than the third preset pressure change threshold, then the sealing test result of the high-pressure oil tank system is determined to be normal, including: Obtain the second air-fuel ratio in the engine; If the difference between the first internal pressure and the sixth internal pressure of the high-pressure fuel tank system is greater than the third preset pressure change threshold, and the difference between the first air-fuel ratio and the second air-fuel ratio in the engine is greater than the preset air-fuel ratio change threshold, then the sealing test result of the high-pressure fuel tank system is determined to be normal.

8. A controller, characterized in that, The controller is configured to perform the method described in any one of claims 1-7.

9. A vehicle, characterized in that, include: A high-pressure oil tank system and a controller, the controller being configured to perform the method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method according to any one of claims 1 to 7.

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