Fuel supply protection method, device and system and electronic equipment

Abstract

The invention discloses a fuel supply protection method, device and system and electronic equipment, and relates to the field of internal combustion engines, the fuel supply protection method comprises the steps of firstly executing a first detection strategy to only inject hydrogen into a hydrogen rail, and detecting the leakage condition of the hydrogen rail to obtain first detection result data; and when the hydrogen rail does not leak, executing a second detection strategy to sequentially inject hydrogen into each hydrogen spraying device through the hydrogen rail, and detecting the leakage condition of the hydrogen rail after each time of hydrogen injection to obtain second detection result data representing the leakage condition of each hydrogen spraying device. And according to the first detection result data and the second detection result data, the number of first target hydrogen sprayers limiting hydrogen supply is determined. And according to the number of the first target hydrogen sprayers, the number of all the hydrogen sprayers and the starting number of the air cylinders meeting the engine starting requirement, the second target hydrogen sprayer is controlled to supply hydrogen when the engine is started. The hydrogen leakage detection from the hydrogen tank to the hydrogen sprayer is realized, and the reliability and the safety of the whole machine are greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of internal combustion engines, and particularly to a fuel supply protection method, device, system, and electronic device. Background Art

[0002] With the continuous development of vehicle manufacturing technology, hydrogen internal combustion engines fueled by hydrogen have begun to be promoted and applied due to their significant advantages such as high power density, strong environmental adaptability, low dependence on hydrogen purity, low overall machine cost, and high reliability. Since hydrogen is a colorless and odorless gas with small ignition energy, a wide flammable limit, and smaller molecular size, it is prone to leakage and thus cause safety problems such as fire and even explosion. Especially for the hydrogen supply device of a hydrogen internal combustion engine, hydrogen leakage is more likely to occur due to reliability problems. How to timely detect the hydrogen leakage situation and then improve the safety of the whole machine and the whole vehicle is particularly important. Summary of the Invention

[0003] In view of the above problems, the present application provides a fuel supply protection method, device, system, and electronic device to achieve the purpose of improving fuel supply safety. The specific solutions are as follows:

[0004] The first aspect of the present application provides a fuel supply protection method, including:

[0005] Execute a first detection strategy to inject only hydrogen into the hydrogen rail, and detect the leakage situation of the hydrogen rail after injecting hydrogen to obtain first detection result data;

[0006] When the first detection result data indicates that there is no leakage in the hydrogen rail, execute a second detection strategy to inject hydrogen into each hydrogen injector in turn through the hydrogen rail, and detect the leakage situation of the hydrogen rail after each injection of hydrogen to obtain second detection result data characterizing the leakage situation of each hydrogen injector;

[0007] Determine the number of first target hydrogen injectors that limit hydrogen supply according to the first detection result data and the second detection result data;

[0008] According to the number of first target hydrogen injectors, the number of all hydrogen injectors, and the number of cylinder starts that meet the engine start requirements, when it is determined that there are second target hydrogen injectors for hydrogen supply, control the second target hydrogen injectors to supply hydrogen when the engine starts.

[0009] In a possible implementation, the step of executing a first detection strategy to inject only hydrogen into the hydrogen rail, and detect the leakage situation of the hydrogen rail after injecting hydrogen to obtain first detection result data includes:

[0010] Control each hydrogen rail valve to close and the hydrogen supply valve to open. After the hydrogen in the hydrogen rail reaches the target state or the injection duration is reached, control the hydrogen supply valve to close;

[0011] Obtain the first detection result data according to the rail pressure change of the hydrogen rail after the hydrogen supply valve closes. The hydrogen supply valve is arranged between the hydrogen rail and the hydrogen tank, and each hydrogen injector is connected to the hydrogen rail through a corresponding hydrogen rail valve.

[0012] In a possible implementation, the execution of the second detection strategy injects hydrogen into each hydrogen injector through the hydrogen rail in sequence, and detects the leakage condition of the hydrogen rail after each hydrogen injection to obtain the second detection result data characterizing the leakage condition of each hydrogen injector, including:

[0013] Execute the detection loop for the target number of times to obtain the detection result data of each hydrogen injector, and obtain the second detection result data according to the detection result data of each hydrogen injector;

[0014] The target number is the same as the number of hydrogen injectors. In each detection loop: control the hydrogen supply valve to open and control the target hydrogen rail valve corresponding to the current detection loop to open. After the hydrogen in the hydrogen rail reaches the target state or the injection duration is reached, control the hydrogen supply valve to close; obtain the detection result data of the target hydrogen injector according to the rail pressure change of the hydrogen rail after the hydrogen supply valve closes. The target hydrogen injector is the hydrogen injector corresponding to the target hydrogen rail valve, and the hydrogen supply valve is arranged between the hydrogen rail and the hydrogen tank.

[0015] In a possible implementation, the obtaining of the first detection result data according to the rail pressure change of the hydrogen rail after the hydrogen supply valve closes, or the obtaining of the detection result data of the target hydrogen injector according to the rail pressure change of the hydrogen rail after the hydrogen supply valve closes, includes:

[0016] Obtain the first detection result data or the detection result data of the target hydrogen injector according to the decrease rate of the rail pressure within the verification duration and the rate threshold after the hydrogen supply valve closes.

[0017] In a possible implementation, determining that the hydrogen in the hydrogen rail reaches the target state includes:

[0018] If the rail pressure of the hydrogen rail reaches the target rail pressure within the injection duration, and the duration of the fluctuation of the target rail pressure within the target rail pressure range is greater than or equal to the fluctuation duration, then determine that the hydrogen in the hydrogen rail reaches the target state.

[0019] In a possible implementation, determining the number of first target hydrogen injectors that limit hydrogen supply according to the first detection result data and the second detection result data includes:

[0020] When the first detection result data indicates that there is a leak in the hydrogen rail, the number of the first target hydrogen injectors is the same as the number of all hydrogen injectors;

[0021] When the first detection result data indicates that there is no leak in the hydrogen rail, the number of the first target hydrogen injectors is the number of hydrogen injectors with leaks in the second detection result data.

[0022] In a possible implementation, when determining the second target hydrogen injectors for hydrogen supply according to the number of the first target hydrogen injectors, the number of all hydrogen injectors, and the number of cylinders to be started that meet the engine start requirements, controlling the second target hydrogen injectors to supply hydrogen when the engine starts includes:

[0023] If the number of the first target hydrogen injectors is less than or equal to the difference between the number of all hydrogen injectors and the number of cylinders to be started, control the second target hydrogen injectors corresponding to the difference quantity to supply hydrogen when the engine starts;

[0024] If the number of the first target hydrogen injectors is greater than the difference, no engine start operation is performed.

[0025] The second aspect of the present application provides a fuel supply protection device, including:

[0026] A first leak detection module, configured to execute a first detection strategy to inject only hydrogen into the hydrogen rail, and detect the leakage condition of the hydrogen rail after injecting hydrogen to obtain first detection result data;

[0027] A second leak detection module, configured to, when the first detection result data indicates that there is no leak in the hydrogen rail, execute a second detection strategy to inject hydrogen into each hydrogen injector in sequence through the hydrogen rail, and detect the leakage condition of the hydrogen rail after each injection of hydrogen to obtain second detection result data characterizing the leakage condition of each hydrogen injector;

[0028] A restricted supply determination module, configured to determine the number of first target hydrogen injectors that limit hydrogen supply according to the first detection result data and the second detection result data; and

[0029] A hydrogen supply control module, configured to, when determining the second target hydrogen injectors for hydrogen supply according to the number of the first target hydrogen injectors, the number of all hydrogen injectors, and the number of cylinders to be started that meet the engine start requirements, control the second target hydrogen injectors to supply hydrogen when the engine starts.

[0030] In a third aspect of the present application, a computer program product is provided, including computer-readable instructions, which, when running on an electronic device, enable the electronic device to implement the fuel supply protection method according to the first aspect or any implementation manner of the first aspect described above.

[0031] In a fourth aspect of the present application, an electronic device is provided, including at least one processor and a memory connected to the processor, wherein:

[0032] The memory is used for storing a computer program;

[0033] The processor is used for executing the computer program so that the electronic device can implement the fuel supply protection method according to the first aspect or any implementation manner of the first aspect described above.

[0034] In a fifth aspect of the present application, a computer storage medium is provided. The storage medium carries one or more computer programs, which, when executed by an electronic device, can enable the electronic device to implement the fuel supply protection method according to the first aspect or any implementation manner of the first aspect described above.

[0035] In a sixth aspect of the present application, a fuel supply protection system is provided, including: a main controller, a hydrogen rail valve, a hydrogen supply valve, and a pressure sensor that are respectively electrically connected to the main controller. The pressure sensor is arranged on the hydrogen rail. The number of hydrogen rail valves is the same as the number of hydrogen injectors. One hydrogen rail valve is arranged on the passage between each hydrogen injector and the hydrogen rail. The hydrogen supply valve is arranged on the connection passage between the hydrogen rail and the hydrogen tank. The main controller is used for executing the fuel supply protection method according to the first aspect or any implementation manner of the first aspect described above.

[0036] By means of the above technical solution, for the fuel supply protection method provided by the present application, first, a first detection strategy is executed to inject only hydrogen into the hydrogen rail, and the leakage condition of the hydrogen rail is detected to obtain first detection result data. When there is no leakage in the hydrogen rail, a second detection strategy is executed to inject hydrogen into each hydrogen injector in turn through the hydrogen rail, and the leakage condition of the hydrogen rail is detected after each injection of hydrogen to obtain second detection result data characterizing the leakage condition of each hydrogen injector. Then, according to the first detection result data and the second detection result data, the number of first target hydrogen injectors for restricting hydrogen supply is determined. According to the number of first target hydrogen injectors, the number of all hydrogen injectors, and the number of cylinder starts that meet the engine start requirements, when determining the second target hydrogen injectors that can supply hydrogen, the second target hydrogen injectors are controlled to supply hydrogen during engine start. The process of detecting hydrogen leakage between the hydrogen tank and the hydrogen injectors is realized, and the supply condition of the hydrogen injectors during engine start can be adjusted according to the leakage condition, thereby greatly reducing the risks of the overall machine reliability and safety caused by hydrogen supply system leakage. Description of the Drawings

[0037] In combination with the accompanying drawings and with reference to the following specific embodiments, the above and other features, advantages and aspects of the various embodiments of the present disclosure will become more apparent. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and that the original and the elements are not necessarily drawn to scale.

[0038] Figure 1 It is a flowchart of a fuel supply protection method provided by the present application;

[0039] Figure 2 It is a structural diagram of a hydrogen supply system provided by the present application;

[0040] Figure 3 It is a flowchart of leakage detection provided by the present application;

[0041] Figure 4 It is a flowchart of hydrogen supply control provided by the present application;

[0042] Figure 5 It is a structural diagram of a fuel supply protection device provided by the present application;

[0043] Figure 6 It is a structural diagram of an electronic device provided by the present application. Specific Embodiments

[0044] The following describes the embodiments of the present application in combination with the accompanying drawings in the embodiments of the present application. The terms used in the embodiments section of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0045] The following describes the embodiments of the present application in combination with the accompanying drawings. Those of ordinary skill in the art will know that with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0046] The terms "first", "second", etc. in the description and claims of the present application and the above accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such terms may be interchanged under appropriate circumstances, and this is only a way of distinguishing the objects with the same attributes when describing the embodiments of the present application. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion, so that a process, method, system, product or device including a series of units does not have to be limited to those units, but may include other units not clearly listed or inherent to these process, method, product or device.

[0047] Due to its small ignition energy, wide flammable limit (it can burn within the range of 4% - 75% Vol%), and small molecular size, hydrogen is more likely to leak, which may lead to major safety issues such as fire and explosion. In particular, devices such as hydrogen injectors on hydrogen internal combustion engines are prone to hydrogen leakage due to reliability problems. Therefore, it is particularly important to quickly and accurately detect the leakage points of the hydrogen supply system on the whole hydrogen internal combustion engine and vehicle to ensure the safety of the vehicle.

[0048] To solve the above problems, the embodiments of the present application provide a fuel supply protection method. The fuel supply protection method of the embodiments of the present application will be introduced in detail below with reference to the accompanying drawings.

[0049] Refer to Figure 1 , Figure 1 which is a schematic flow of a fuel supply protection method provided by an embodiment of the present application. As Figure 1 shown, a fuel supply protection method provided by an embodiment of the present application may include steps 101 to 104, and these steps will be described in detail below.

[0050] 101. Execute the first detection strategy to inject only hydrogen into the hydrogen rail, and detect the leakage condition of the hydrogen rail after injecting hydrogen to obtain the first detection result data.

[0051] In one embodiment, refer to Figure 2 shown, the currently commonly used hydrogen supply system consists of a hydrogen tank 1, a hydrogen supply valve 2, a pressure reducing valve 3, a pressure sensor 4, a hydrogen rail 5, and a hydrogen injector 7. The number of hydrogen injectors 7 corresponds to the number of cylinders in the hydrogen internal combustion engine 8, that is, each cylinder corresponds to one hydrogen injector 7. As Figure 2 shown in the six - cylinder hydrogen internal combustion engine has six cylinders and accordingly six hydrogen injectors. Similarly, for other hydrogen internal combustion engines such as four - cylinder and eight - cylinder hydrogen internal combustion engines, there are corresponding numbers of hydrogen injectors.

[0052] Based on the above hydrogen supply system, refer to Figure 2 shown, by adding a hydrogen rail valve 6 between each hydrogen injector 7 and the hydrogen rail 5, separate control of the hydrogen supply to each hydrogen injector 7 can be achieved. Furthermore, after the vehicle is powered on before starting the vehicle, each hydrogen rail valve 6 can be controlled to close and the hydrogen supply valve 2 can be controlled to open, so that only the hydrogen in the hydrogen tank 1 is injected into the hydrogen rail 5. Then, after the hydrogen in the hydrogen rail 5 reaches the target state or the injection duration is reached, the hydrogen supply valve 2 can be controlled to close, making the hydrogen in the hydrogen rail 5 in a relatively closed state. Furthermore, according to the change in the rail pressure in the hydrogen rail 5 after the hydrogen supply valve 2 is closed, it is possible to judge whether there is a leakage in the hydrogen rail 5 and obtain the first detection result data indicating whether there is a leakage in the hydrogen rail 5.

[0053] It can be understood that the above hydrogen rail valve 6 can be a solenoid valve or other valves that can be controlled by an electrical signal, and there is no limitation here.

[0054] 102. When the first detection result data indicates that there is no leakage in the hydrogen rail, execute the second detection strategy to inject hydrogen into each hydrogen injector through the hydrogen rail in sequence, and detect the leakage situation of the hydrogen rail after each injection of hydrogen to obtain the second detection result data characterizing the leakage situation of each hydrogen injector.

[0055] In one embodiment, when the above first detection result data indicates that there is a leakage in the hydrogen rail, it means that the leakage situation is relatively serious, then the hydrogen internal combustion engine can no longer be controlled to start to avoid safety incidents such as fire and explosion, and ensure the safety of the vehicle. On the contrary, when the first detection result data indicates that there is no leakage in the hydrogen rail, the situation of whether each hydrogen injector has a leakage can be further judged.

[0056] Specifically, the detection loop of the target number of times can be executed to obtain the detection result data of each hydrogen injector, and the second detection result data can be obtained according to the detection result data of each hydrogen injector. Wherein the target number is the same as the number of hydrogen injectors. In each detection loop: control the hydrogen supply valve to open and control the target hydrogen rail valve corresponding to the current detection loop to open. After the hydrogen in the hydrogen rail reaches the target state or the injection duration is reached, control the hydrogen supply valve to close. According to the change of the rail pressure of the hydrogen rail after the hydrogen supply valve is closed, the detection result data of the target hydrogen injector is obtained.

[0057] For example, referring to Figure 2 As shown, the hydrogen internal combustion engine has six cylinders, and correspondingly has six hydrogen injectors and six hydrogen rail valves. In each detection loop, open the hydrogen supply valve 2 again. At the same time, only open the hydrogen rail valve 6 of one cylinder, and the other hydrogen rail valves 6 are in the closed state. Then after the rail pressure in the hydrogen rail 5 reaches the target state, close the hydrogen supply valve 2 to form a relatively closed environment, and then according to the change of the rail pressure of the hydrogen rail 5, obtain the detection result data of this hydrogen injector 7. Among them, the hydrogen injectors with leakage can be marked according to the identification of the corresponding cylinder. For example, the identifications of the cylinders are A, B, C, D, E, F. When the hydrogen injectors corresponding to cylinders A and C have leakage situations, it can be determined that the corresponding hydrogen injectors A and C have leakage situations.

[0058] It can be understood that those skilled in the art can adjust and select the detection order of the above each hydrogen injector according to needs, and details are not described here.

[0059] 103. According to the first detection result data and the second detection result data, determine the number of the first target hydrogen injectors for restricting hydrogen supply.

[0060] In one embodiment, as described in the above embodiment, when the first detection result data indicates that there is a leak in the hydrogen rail, the number of the first target hydrogen injectors restricted from supplying hydrogen at this time is the same as the number of all hydrogen injectors, that is, all hydrogen injectors are prohibited from supplying hydrogen, which can be achieved by closing the hydrogen supply valve and all hydrogen rail valves.

[0061] When the first detection result data indicates that there is no leak in the hydrogen rail, the number of the first target hydrogen injectors is the number of the leaking hydrogen injectors included in the second detection result data.

[0062] 104. According to the number of the first target hydrogen injectors, the number of all hydrogen injectors, and the number of cylinders to be started that meet the engine start requirement, when it is determined that there are second target hydrogen injectors for supplying hydrogen, control the second target hydrogen injectors to supply hydrogen during engine start.

[0063] Specifically, the number of cylinders to be started that meet the engine start requirement is the minimum number of cylinders that can start the engine. For example, for a 4-cylinder engine, the minimum number of cylinders that can start is 3; for a 6-cylinder engine, the minimum number of cylinders that can start is 4; for an 8-cylinder engine, the minimum number of cylinders that can start is 4, etc. It is the minimum number of cylinders required when the engine starts.

[0064] For example, when the number of the first target hydrogen injectors is less than or equal to the difference between the number of all hydrogen injectors and the number of cylinders to be started, control the second target hydrogen injectors corresponding to the difference number to supply hydrogen during engine start, which can meet the requirement of short-distance vehicle relocation, while restricting the vehicle speed and entering the corresponding protection mode. For example, when there are leaks in hydrogen injector A and hydrogen injector C, the number of the first target hydrogen injectors is 2, and the number of cylinders to be started is 1, the difference is 5, 2 < 5, then control 4 second target hydrogen injectors to supply hydrogen during engine start.

[0065] When the number of the first target hydrogen injectors is greater than the difference, the engine start operation is no longer performed. That is, when there are too many leaking hydrogen injectors, the engine start is no longer controlled to ensure the safety of the engine and the vehicle.

[0066] This fuel supply protection method realizes the self-check of the leak between the hydrogen tank and the hydrogen injector, can determine the leak situation existing in the hydrogen supply pipeline, and makes corresponding safety protection actions for the engine according to the leak situation, can significantly improve the maintenance and repair efficiency of the hydrogen internal combustion engine fuel system, greatly reduce the risks of the overall machine reliability and safety caused by the hydrogen supply system leak, and improve the operation safety of the engine and the vehicle.

[0067] In some embodiments, to make the results of leak detection more accurate and reliable, the process of obtaining the first detection result data based on the rail pressure change of the hydrogen rail after the hydrogen supply valve is closed, or obtaining the detection result data of the target hydrogen injector according to the rail pressure change of the hydrogen rail after the hydrogen supply valve is closed in the above embodiments may specifically include:

[0068] Based on the rate of decrease in rail pressure and the rate threshold within the verification duration after the hydrogen supply valve is closed, obtain the first detection result data or the detection result data of the target hydrogen injector.

[0069] Specifically, for the above detection process of hydrogen rail leakage and the detection process of hydrogen injector leakage, timing can start after the hydrogen supply valve is closed. For example, within a verification duration of 2 seconds, based on the pressure values read from the pressure sensor, determine the rate of pressure decrease within the verification duration, and compare this rate of decrease with the rate threshold. If the rate of decrease is less than the rate threshold, it can be determined that there is no leakage. On the contrary, when the rate of decrease is greater than or equal to the rate threshold, it can be determined that there is leakage.

[0070] In addition, a method of comparing the rail pressure decrease value within the verification duration with the decrease threshold can also be used to determine whether there is leakage, which is not limited here.

[0071] In other embodiments, to make the result data of determining leakage based on the rail pressure change more accurate and reliable in the above embodiments of the hydrogen rail leakage detection process and the hydrogen injector leakage detection process, determining that the hydrogen in the hydrogen rail reaches the target state may specifically include:

[0072] If the rail pressure of the hydrogen rail reaches the target rail pressure within the injection duration, and the duration of the fluctuation of the target rail pressure within the target rail pressure range is greater than or equal to the fluctuation duration, then determine that the hydrogen in the hydrogen rail reaches the target state.

[0073] Specifically, the injection duration can be set to 3 to 5 seconds as needed. If the rail pressure of the hydrogen rail can reach the target rail pressure (for example, 10 bar) within the injection duration, and the fluctuation range of the target rail pressure within the 2-second fluctuation duration is within ±10%, it can be determined that it is in a stable state. If the rail pressure in the hydrogen rail fails to reach the above stable state within the injection duration, after the injection duration is reached, the hydrogen supply valve will also be closed. Then, the subsequent leakage judgment process is carried out.

[0074] As a specific application of the above fuel supply protection method, refer to Figure 3 As shown, after the vehicle is powered on, it can enter the Figure 3 self-check cycle process shown in, and sequentially detect the leakage conditions of the hydrogen rail and the hydrogen injector:

[0075] After the self-check cycle starts, first determine whether there is a leak in the hydrogen rail according to the above detection process of hydrogen rail leakage. When there is a leak in the hydrogen rail, directly generate a fault message of "hydrogen supply system failure" and end the self-check cycle.

[0076] When there is no leak in the hydrogen rail, perform leakage detection on the hydrogen injectors (i.e., hydrogen sprayers) of each cylinder, use the ECU (Electronic Control Unit) to record the cylinders (i.e., hydrogen sprayers) with leaks, then obtain the number of leaking hydrogen sprayers and report a fault for the leakage amount, and then proceed with the self-check cycle process.

[0077] Corresponding reference Figure 4 As shown, the control logic for the hydrogen supply system of the engine after the self-check work cycle ends includes:

[0078] 1. If the self-check result is normal, there is no leakage in the hydrogen rail and no leakage in the hydrogen injectors, then start the engine normally.

[0079] 2. If the self-check result is "hydrogen supply system leakage", that is, there is a leak in the hydrogen rail, then the ECU controls the starter not to rotate, and at the same time cuts off the hydrogen supply valve, the hydrogen rail valves of all cylinders, and the hydrogen injectors to ensure that hydrogen leakage does not occur.

[0080] 3. If the self-check result is that the leakage amount of the hydrogen injector is too large, and the number of leaking cylinders (i.e., the number of leaking hydrogen sprayers) ≤ the difference between the total number of cylinders and the minimum number of cylinders that can start the engine. When the engine tries to start, the cylinders with leaks execute the logic of keeping the hydrogen rail valve closed and the hydrogen injector closed. At this time, the hydrogen supply valve is opened, and the other cylinders can work normally, and enter the protection mode for short-distance vehicle relocation.

[0081] 4. If the self-check result is that the leakage amount of the hydrogen injector is too large, and the number of leaking cylinders > the difference between the total number of cylinders and the minimum number of cylinders that can start the engine. When the engine tries to start, the ECU controls the starter not to rotate, and at the same time cuts off the hydrogen supply valve, the hydrogen rail solenoid valves of all cylinders, and the hydrogen injectors to ensure that hydrogen leakage does not occur.

[0082] It can be understood that those skilled in the art can adjust the above control logic as needed, and no limitation is made here.

[0083] The above introduced a fuel supply protection method provided by an embodiment of the present application. Next, a device for executing the above fuel supply protection method will be introduced.

[0084] Please refer to Figure 5 , Figure 5 which is a schematic structural diagram of a fuel supply protection device provided by an embodiment of the present application. As Figure 5 shown, the fuel supply protection device includes:

[0085] The first leakage detection module 501 is used to execute the first detection strategy to inject only hydrogen into the hydrogen rail, and detect the leakage situation of the hydrogen rail after injecting hydrogen, so as to obtain the first detection result data;

[0086] The second leakage detection module 502 is used to execute the second detection strategy to inject hydrogen into each hydrogen injector through the hydrogen rail in turn when the first detection result data indicates that there is no leakage in the hydrogen rail, and detect the leakage situation of the hydrogen rail after each injection of hydrogen, so as to obtain the second detection result data characterizing the leakage situation of each hydrogen injector;

[0087] The restricted supply determination module 503 is used to determine the number of the first target hydrogen injectors for which hydrogen supply is restricted according to the first detection result data and the second detection result data; and,

[0088] The hydrogen supply control module 504 is used to control the second target hydrogen injectors to supply hydrogen during engine startup when it is determined that there are second target hydrogen injectors for which hydrogen supply is carried out according to the number of the first target hydrogen injectors, the number of all hydrogen injectors, and the number of cylinders started that meet the engine startup requirements.

[0089] In a possible implementation, the process in which the first leakage detection module 501 executes the first detection strategy to inject only hydrogen into the hydrogen rail and detect the leakage situation of the hydrogen rail after injecting hydrogen to obtain the first detection result data includes:

[0090] Control each hydrogen rail valve to close and the hydrogen supply valve to open. After the hydrogen in the hydrogen rail reaches the target state or the injection duration is reached, control the hydrogen supply valve to close;

[0091] Obtain the first detection result data according to the change of the rail pressure of the hydrogen rail after the hydrogen supply valve is closed. The hydrogen supply valve is arranged between the hydrogen rail and the hydrogen tank, and each hydrogen injector is connected to the hydrogen rail through a corresponding hydrogen rail valve.

[0092] In a possible implementation, the process in which the second leakage detection module 502 executes the second detection strategy to inject hydrogen into each hydrogen injector through the hydrogen rail in turn and detect the leakage situation of the hydrogen rail after each injection of hydrogen to obtain the second detection result data characterizing the leakage situation of each hydrogen injector includes:

[0093] Execute the detection loop for the target number of times to obtain the detection result data of each hydrogen injector, and obtain the second detection result data according to the detection result data of each hydrogen injector;

[0094] The target number is the same as the number of hydrogen injectors. In each detection cycle: control the hydrogen supply valve to open and control the target hydrogen rail valve corresponding to the current detection cycle to open. After the hydrogen in the hydrogen rail reaches the target state or the injection duration is reached, control the hydrogen supply valve to close; according to the change in the rail pressure of the hydrogen rail after the hydrogen supply valve is closed, obtain the detection result data of the target hydrogen injector. The target hydrogen injector is the hydrogen injector corresponding to the target hydrogen rail valve, and the hydrogen supply valve is arranged between the hydrogen rail and the hydrogen tank.

[0095] In a possible implementation, the process by which the first leakage detection module 501 obtains the first detection result data based on the change in the rail pressure of the hydrogen rail after the hydrogen supply valve is closed, or the process by which the second leakage detection module 502 obtains the detection result data of the target hydrogen injector based on the change in the rail pressure of the hydrogen rail after the hydrogen supply valve is closed, includes:

[0096] Based on the rate of decrease in the rail pressure within the verification duration and the rate threshold after the hydrogen supply valve is closed, obtain the first detection result data or the detection result data of the target hydrogen injector.

[0097] In a possible implementation, the process by which the first leakage detection module 501 determines that the hydrogen in the hydrogen rail reaches the target state includes:

[0098] If the rail pressure of the hydrogen rail reaches the target rail pressure within the injection duration, and the duration of the fluctuation of the target rail pressure within the target rail pressure range is greater than or equal to the fluctuation duration, it is determined that the hydrogen in the hydrogen rail reaches the target state.

[0099] In a possible implementation, the process by which the restricted supply determination module 503 determines the number of the first target hydrogen injectors for which hydrogen supply is restricted based on the first detection result data and the second detection result data includes:

[0100] When the first detection result data indicates that there is a leakage in the hydrogen rail, the number of the first target hydrogen injectors is the same as the number of all hydrogen injectors;

[0101] When the first detection result data indicates that there is no leakage in the hydrogen rail, the number of the first target hydrogen injectors is the number of the hydrogen injectors with leakage in the second detection result data.

[0102] In a possible implementation, the process by which the hydrogen supply control module 504 controls the second target hydrogen injectors to supply hydrogen when the engine starts, based on the number of the first target hydrogen injectors, the number of all hydrogen injectors, and the number of cylinders whose start meets the engine start requirements, when it is determined that there are second target hydrogen injectors for which hydrogen supply is to be performed, includes:

[0103] If the number of the first target hydrogen injectors is less than or equal to the difference between the number of all hydrogen injectors and the number of cylinders whose start meets the engine start requirements, control the second target hydrogen injectors corresponding to the difference number to supply hydrogen when the engine starts;

[0104] If the number of the first target hydrogen injectors is greater than the difference value, the starting operation of the engine will no longer be performed.

[0105] An electronic device is also provided in an embodiment of the present application. Refer to Figure 6 As shown, it shows a schematic structural diagram of an electronic device suitable for implementing the electronic device in the embodiment of the present application. The electronic device in the embodiment of the present application may include, but is not limited to, such as an ECU (Electronic Control Unit, electronic controller unit), a VCU (Vehicle Control Unit, vehicle controller), an MCU (Micro Controller Unit, micro control unit), an HCU (Hybrid Control Unit, hybrid control system), etc. Figure 6 The electronic device shown is only an example and should not bring any limitation to the functions and usage scope of the embodiment of the present application.

[0106] As Figure 6 shown, the electronic device may include a processing device (such as a central processing unit, a graphics processing unit, etc.) 601, which may perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 602 or the program loaded from the storage device 608 into the random access memory (RAM) 603. When the electronic device is powered on, various programs and data required for the operation of the electronic device are also stored in the RAM 603. The processing device 601, the ROM 602, and the RAM 603 are connected to each other through a bus 604. The input / output (I / O) interface 605 is also connected to the bus 604.

[0107] Generally, the following devices may be connected to the I / O interface 605: an input device 606 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 608 including, for example, a memory card, a hard disk, etc.; and a communication device 609. The communication device 609 may allow the electronic device to communicate with other devices wirelessly or wiredly to exchange data. Although Figure 6 the electronic device with various devices is shown, it should be understood that it is not required to implement or have all the shown devices. Instead, more or fewer devices may be implemented or had.

[0108] An embodiment of the present application also provides a computer program product including computer-readable instructions, which when running on an electronic device, enable the electronic device to implement any one of the fuel supply protection methods provided in the embodiment of the present application.

[0109] In an embodiment of the present application, a computer-readable storage medium is further provided. The storage medium carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any fuel supply protection method provided by the embodiments of the present application.

[0110] In an embodiment of the present application, a fuel supply protection system is further provided. As shown in Figure 2 the figure, it includes a main controller (not shown in the figure), a hydrogen rail valve 6, a hydrogen supply valve 2, and a pressure sensor 4 that are electrically connected to the main controller respectively. The pressure sensor 4 is arranged on the hydrogen rail 5. The number of hydrogen rail valves 6 is the same as the number of hydrogen injectors 7. A hydrogen rail valve 6 is arranged on the passage between each hydrogen injector 7 and the hydrogen rail 5. The hydrogen supply valve 2 is arranged on the connection passage between the hydrogen rail 4 and the hydrogen tank 1. The main controller is used to execute the fuel supply protection method described in the above embodiments.

[0111] In addition, it should be noted that the device embodiments described above are only illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the attached drawings of the device embodiments provided in the present application, the connection relationship between modules indicates that they have a communication connection, which can be specifically implemented as one or more communication buses or signal lines.

[0112] Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course, it can also be implemented by dedicated hardware including application-specific integrated circuits, dedicated CPUs, dedicated memories, dedicated components, etc. Generally, functions completed by computer programs can be easily implemented by corresponding hardware, and the specific hardware structures used to implement the same function can also be various, such as analog circuits, digital circuits or dedicated circuits. However, for the present application, in more cases, software program implementation is a better implementation method. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a readable storage medium, such as a floppy disk, a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disc of a computer, etc., and includes several instructions to enable a computer device (which can be a personal computer, a training device, or a network device, etc.) to execute the methods described in various embodiments of the present application.

[0113] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product.

[0114] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, training device, or data center to another website, computer, training device, or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can store, or a data storage device such as a training device or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

Claims

1. A fuel supply protection method, characterized in that, Including: Execute the first detection strategy to inject only hydrogen into the hydrogen rail, and detect the leakage condition of the hydrogen rail after the hydrogen injection to obtain the first detection result data; When the first detection result data indicates that there is no leakage in the hydrogen rail, execute the second detection strategy to inject hydrogen into each hydrogen injector through the hydrogen rail in sequence, and detect the leakage condition of the hydrogen rail after each hydrogen injection to obtain the second detection result data characterizing the leakage condition of each hydrogen injector; Determine the number of first target hydrogen injectors that limit hydrogen supply according to the first detection result data and the second detection result data; According to the number of first target hydrogen injectors, the number of all hydrogen injectors, and the number of cylinder starts that meet the engine start requirements, when it is determined that there are second target hydrogen injectors for hydrogen supply, control the second target hydrogen injectors to supply hydrogen during engine start.

2. The fuel supply protection method according to claim 1, characterized in that The execution of the first detection strategy to inject only hydrogen into the hydrogen rail and detect the leakage condition of the hydrogen rail after the hydrogen injection to obtain the first detection result data includes: Control each hydrogen rail valve to close and the hydrogen supply valve to open, and after the hydrogen in the hydrogen rail reaches the target state or the injection duration is reached, control the hydrogen supply valve to close; Obtain the first detection result data according to the rail pressure change condition of the hydrogen rail after the hydrogen supply valve is closed. The hydrogen supply valve is arranged between the hydrogen rail and the hydrogen tank, and each hydrogen injector is connected to the hydrogen rail through a corresponding hydrogen rail valve.

3. The fuel supply protection method according to claim 2, characterized in that, The execution of the second detection strategy to inject hydrogen into each hydrogen injector through the hydrogen rail in sequence and detect the leakage condition of the hydrogen rail after each hydrogen injection to obtain the second detection result data characterizing the leakage condition of each hydrogen injector includes: Execute the detection cycle of the target number of times to obtain the detection result data of each hydrogen injector, and obtain the second detection result data according to the detection result data of each hydrogen injector; The target number is the same as the number of hydrogen injectors. In each detection cycle: control the hydrogen supply valve to open and control the target hydrogen rail valve corresponding to the current detection cycle to open. After the hydrogen in the hydrogen rail reaches the target state or the injection duration is reached, control the hydrogen supply valve to close; obtain the detection result data of the target hydrogen injector according to the rail pressure change condition of the hydrogen rail after the hydrogen supply valve is closed. The target hydrogen injector is the hydrogen injector corresponding to the target hydrogen rail valve, and the hydrogen supply valve is arranged between the hydrogen rail and the hydrogen tank.

4. The fuel supply protection method according to claim 3, characterized in that The obtaining of the first detection result data according to the rail pressure change condition of the hydrogen rail after the hydrogen supply valve is closed, or the obtaining of the detection result data of the target hydrogen injector according to the rail pressure change condition of the hydrogen rail after the hydrogen supply valve is closed, includes: Obtain the first detection result data or the detection result data of the target hydrogen injector according to the decrease rate of the rail pressure within the verification duration and the rate threshold after the hydrogen supply valve is closed.

5. The fuel supply protection method according to claim 3, characterized in that, Determining that the hydrogen in the hydrogen rail reaches the target state includes: If the rail pressure of the hydrogen rail reaches the target rail pressure within the injection duration, and the duration of the fluctuation of the target rail pressure within the target rail pressure range is greater than or equal to the fluctuation duration, it is determined that the hydrogen in the hydrogen rail reaches the target state.

6. The fuel supply protection method according to claim 1, characterized in that The determining the number of the first target hydrogen injectors for restricting hydrogen supply according to the first detection result data and the second detection result data includes: When the first detection result data indicates that there is a leak in the hydrogen rail, the number of the first target hydrogen injectors is the same as the number of all hydrogen injectors; When the first detection result data indicates that there is no leak in the hydrogen rail, the number of the first target hydrogen injectors is the number of the hydrogen injectors with leaks in the second detection result data.

7. The fuel supply protection method according to claim 1, characterized in that The controlling the second target hydrogen injectors to supply hydrogen during engine startup when it is determined that there are second target hydrogen injectors for supplying hydrogen according to the number of the first target hydrogen injectors, the number of all hydrogen injectors, and the number of cylinders starting up that meet the engine startup requirements includes: If the number of the first target hydrogen injectors is less than or equal to the difference between the number of all hydrogen injectors and the number of cylinders starting up, control the second target hydrogen injectors corresponding to the difference number to supply hydrogen during engine startup; If the number of the first target hydrogen injectors is greater than the difference, no engine startup operation is performed.

8. A fuel supply protection device, characterized in that, Including: A first leak detection module, configured to execute a first detection strategy to inject only hydrogen into the hydrogen rail, and detect the leak situation of the hydrogen rail after injecting hydrogen, to obtain first detection result data; A second leak detection module, configured to execute a second detection strategy to inject hydrogen into each hydrogen injector in sequence through the hydrogen rail and detect the leak situation of the hydrogen rail after each injection of hydrogen when the first detection result data indicates that there is no leak in the hydrogen rail, to obtain second detection result data characterizing the leak situation of each hydrogen injector; A restricted supply determination module, configured to determine the number of the first target hydrogen injectors for restricting hydrogen supply according to the first detection result data and the second detection result data; and A hydrogen supply control module, configured to control the second target hydrogen injectors to supply hydrogen during engine startup when it is determined that there are second target hydrogen injectors for supplying hydrogen according to the number of the first target hydrogen injectors, the number of all hydrogen injectors, and the number of cylinders starting up that meet the engine startup requirements.

9. An electronic device, characterized in that, Including at least one processor and a memory connected to the processor, wherein: The memory is used to store a computer program; The processor is used to execute the computer program so that the electronic device can implement the fuel supply protection method according to any one of claims 1 to 7.

10. A fuel supply protection system, characterized in that, Including: A main controller, a hydrogen rail valve, a hydrogen supply valve and a pressure sensor which are electrically connected to the main controller respectively. The pressure sensor is arranged on the hydrogen rail. The number of the hydrogen rail valves is the same as that of the hydrogen injectors. One hydrogen rail valve is arranged on the passage between each hydrogen injector and the hydrogen rail. The hydrogen supply valve is arranged on the connecting passage between the hydrogen rail and the hydrogen tank. The main controller is used to execute the fuel supply protection method as described in any one of claims 1 to 7.

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