Scavenging control method, device, electronic equipment and storage medium for hydrogen internal combustion engine

Abstract

The present application discloses a scavenging control method, device, electronic device and storage medium for a hydrogen internal combustion engine. The scavenging control method for the hydrogen internal combustion engine comprises: when the hydrogen internal combustion engine is turned off, obtaining a first tail gas water content at a first location in the hydrogen internal combustion engine; when the first tail gas water content is greater than or equal to a first preset value, controlling the hydrogen internal combustion engine to perform a first scavenging operation; when the duration of the first scavenging operation reaches a first preset duration, returning to the step of obtaining the first tail gas water content at a first location in the hydrogen internal combustion engine. The scavenging control method for the hydrogen internal combustion engine can reduce the tail gas water content inside the hydrogen internal combustion engine to a level that meets the rust prevention requirements through the scavenging operation, thereby greatly reducing the probability of rust, keeping the tail gas water content inside the hydrogen internal combustion engine at a relatively low level, keeping the hydrogen internal combustion engine in a good working state, and extending the service life of the hydrogen internal combustion engine.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen internal combustion engines, and in particular to a scavenging control method, device, electronic equipment and storage medium for a hydrogen internal combustion engine. Background Art

[0002] Hydrogen is a renewable fuel. As an energy carrier, it has high flammability limit and flame propagation speed characteristics, high energy conversion efficiency, and only water (H2O) and nitrogen oxides (NO) are produced after combustion in the cylinder. x ) emissions, hydrogen internal combustion engines have the potential for cleaner emissions than other internal combustion engines, and at the same time, hydrogen internal combustion engines have low requirements for hydrogen purity, so they are receiving more and more attention from society.

[0003] The molecular formula of internal combustion engine fuel is C x H y O z Simplified, the chemical equation for complete combustion of fuel in the cylinder is C x H y O z +(x+0.25y-0.5z)O2→xCO2+0.5yH2O. The water content of the exhaust gas of a hydrogen internal combustion engine is significantly higher than that of other fuels. There is a temperature drop in the exhaust pipe. When the temperature of the exhaust gas flowing through the exhaust pipe drops to a certain level, the water in the exhaust gas will condense. Therefore, the components in the cylinder and the exhaust system are affected by the high water content of the gas, and the probability of rust is relatively high, which affects the working condition and service life of the hydrogen internal combustion engine.

[0004] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0005] The purpose of the present application is to provide a scavenging control method, device, electronic device and storage medium for a hydrogen internal combustion engine. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0006] According to one aspect of an embodiment of the present application, a scavenging control method for a hydrogen internal combustion engine is provided, comprising:

[0007] When the hydrogen internal combustion engine is turned off, obtaining a first exhaust gas water content at a first location in the hydrogen internal combustion engine;

[0008] When the first exhaust gas water content is greater than or equal to a first preset value, controlling the hydrogen internal combustion engine to perform a first scavenging operation;

[0009] When the duration of the first scavenging operation reaches a first preset duration, the process returns to the step of obtaining a first exhaust gas water content at a first location in the hydrogen internal combustion engine.

[0010] In some embodiments of the present application, the method further includes:

[0011] When the first exhaust gas water content is less than a first preset value, obtaining a second exhaust gas water content at a second location in the hydrogen internal combustion engine;

[0012] When the water content of the second exhaust gas is greater than or equal to a second preset threshold, controlling the hydrogen internal combustion engine to perform a second scavenging operation;

[0013] When the duration of the second scavenging operation reaches a second preset duration, the process returns to the step of obtaining a second exhaust gas water content at a second location in the hydrogen internal combustion engine.

[0014] In some embodiments of the present application, the method further includes:

[0015] When the water content of the second exhaust gas is less than a second preset threshold, the hydrogen internal combustion engine is controlled to be powered off.

[0016] In some embodiments of the present application, the first portion is the interior of the cylinder and the second portion is the interior of the exhaust system, or the first portion is the interior of the exhaust system and the second portion is the interior of the cylinder.

[0017] In some embodiments of the present application, the interior of the exhaust system includes the interior of a supercharger volute, the interior of an exhaust pipe, or the interior of an exhaust tail pipe.

[0018] In some embodiments of the present application, obtaining the first exhaust gas water content at a first location within the hydrogen internal combustion engine includes: receiving the first exhaust gas water content detected by a first gas water content sensor, wherein the first gas water content sensor is disposed at the first location.

[0019] In some embodiments of the present application, obtaining a second exhaust gas water content at a second location within the hydrogen internal combustion engine includes: receiving a second exhaust gas water content detected by a second gas water content sensor, wherein the second gas water content sensor is disposed at the second location.

[0020] According to another aspect of an embodiment of the present application, there is provided a scavenging control device for a hydrogen internal combustion engine, comprising:

[0021] An acquisition module, used for acquiring a first tail gas water content at a first location in the hydrogen internal combustion engine when the hydrogen internal combustion engine is turned off;

[0022] a control module, controlling the hydrogen internal combustion engine to perform a first scavenging operation when the first exhaust gas water content is greater than or equal to a first preset value;

[0023] The acquisition module is also used for returning to the step of acquiring a first exhaust gas water content at a first location in the hydrogen internal combustion engine when the duration of the first scavenging operation reaches a first preset duration.

[0024] According to another aspect of an embodiment of the present application, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the scavenging control method for a hydrogen internal combustion engine as described in any embodiment of the present application.

[0025] According to another aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which a computer program is stored, and the computer program is executed by a processor to implement the scavenging control method of a hydrogen internal combustion engine described in any embodiment of the present application.

[0026] The technical solution provided by one aspect of the embodiments of the present application may have the following beneficial effects:

[0027] The scavenging control method of a hydrogen internal combustion engine provided in an embodiment of the present application obtains a first exhaust gas water content at a first part of the hydrogen internal combustion engine when the hydrogen internal combustion engine is turned off, and controls the hydrogen internal combustion engine to perform a first scavenging operation when the first exhaust gas water content is greater than or equal to a first preset value, and returns to the method of obtaining the first exhaust gas water content at the first part of the hydrogen internal combustion engine when the duration of the first scavenging operation reaches a first preset duration. In this way, the exhaust gas water content inside the hydrogen internal combustion engine can be reduced to a level that meets the rust prevention requirements through the scavenging operation, thereby greatly reducing the probability of rust, maintaining the exhaust gas water content inside the hydrogen internal combustion engine at a low level, maintaining the hydrogen internal combustion engine in a good working state, and extending the service life of the hydrogen internal combustion engine.

[0028] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 The graph shows the variation of water content in exhaust gas of engines using three different fuels: hydrogen, natural gas and diesel, with the excess air coefficient λ.

[0031] Figure 2 A flow chart of a scavenging control method for a hydrogen internal combustion engine according to an embodiment of the present application is shown.

[0032] Figure 3 A fitting curve diagram of a relationship between a first preset time length and a first exhaust gas moisture content according to an embodiment of the present application is shown.

[0033] Figure 4 A flow chart of a scavenging control method for a hydrogen internal combustion engine according to another embodiment of the present application is shown.

[0034] Figure 5 A fitting curve diagram of a relationship between a second preset time length and a second exhaust gas moisture content according to an embodiment of the present application is shown.

[0035] Figure 6 A flow chart of a scavenging control method for a hydrogen internal combustion engine according to another embodiment of the present application is shown.

[0036] Figure 7 A structural block diagram of a scavenging control device for a hydrogen internal combustion engine according to an embodiment of the present application is shown.

[0037] Figure 8 A structural block diagram of an electronic device according to an embodiment of the present application is shown.

[0038] Fig. 9 A schematic diagram of a computer-readable storage medium according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0040] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0041] Explanation of relevant terms:

[0042] Excess air coefficient: also known as "excess air coefficient", "excess air coefficient", commonly known as "residual air coefficient". It refers to the ratio of the actual amount of air supplied to fuel combustion to the theoretical amount of air. It is an important parameter reflecting the fuel-air ratio, and is usually represented by the symbol "λ". In the combustion chamber of an internal combustion engine, in order to make the fuel burn as completely as possible, the actual amount of air supplied must always be greater than the theoretical amount of air (the excess part is called "excess air"), that is, the excess air coefficient must be greater than 1. However, combustion theory and operating experience show that λ that is too large or too small (indicating too much or too little air supply) is not conducive to combustion, that is, different combustion equipment has its own optimal excess air coefficient value.

[0043] refer to Figure 1 As shown, Figure 1 The graph of the variation of water content in the exhaust gas of three different fuels, hydrogen, natural gas and diesel, with λ is shown. The water content of the exhaust gas of hydrogen internal combustion engines is significantly higher than that of other fuels. The high gas water content exhaust gas after hydrogen combustion in hydrogen internal combustion engines is one of the main reasons for the corrosion of hydrogen internal combustion engines. In the related art, the high gas water content of the exhaust gas of hydrogen internal combustion engines causes the various components in the cylinder and exhaust system to be affected by the high gas water content, resulting in a high probability of corrosion, which affects the working state and service life of the hydrogen internal combustion engine.

[0044] In view of the problems existing in the related art, the scavenging control method of the hydrogen internal combustion engine provided in the embodiment of the present application obtains the first exhaust gas water content at a first part in the hydrogen internal combustion engine when the hydrogen internal combustion engine is turned off, and controls the hydrogen internal combustion engine to perform a first scavenging operation when the first exhaust gas water content is greater than or equal to a first preset value, and returns to the method of obtaining the first exhaust gas water content at the first part in the hydrogen internal combustion engine when the duration of the first scavenging operation reaches the first preset duration. In this way, the exhaust gas water content inside the hydrogen internal combustion engine can be reduced to the level that meets the rust prevention requirements through the scavenging operation, thereby greatly reducing the probability of rust, keeping the exhaust gas water content inside the hydrogen internal combustion engine at a low level, keeping the hydrogen internal combustion engine in a good working condition, and extending the service life of the hydrogen internal combustion engine.

[0045] The following describes a scavenging control method, device, electronic device and storage medium for a hydrogen internal combustion engine proposed according to an embodiment of the present application in conjunction with the accompanying drawings.

[0046] refer to Figure 2 As shown, one embodiment of the present application provides a scavenging control method for a hydrogen internal combustion engine, which may include:

[0047] S10, when the hydrogen internal combustion engine is turned off, obtaining a first exhaust gas water content at a first location in the hydrogen internal combustion engine.

[0048] When a normally working hydrogen internal combustion engine receives a stop command, the hydrogen supply valve is first cut off. Then, as the hydrogen rail pressure continues to decrease, the hydrogen injection valve cannot be opened and the injection action in the cylinder cannot be completed. The hydrogen internal combustion engine is shut down. At this time, the fuel in the hydrogen supply pipeline is consumed, thereby preventing the risk of fuel leakage.

[0049] Exemplarily, obtaining a first exhaust gas water content at a first location in the hydrogen internal combustion engine may include: receiving the first exhaust gas water content detected by a first gas water content sensor, wherein the first gas water content sensor is disposed at the first location.

[0050] In another embodiment, a plurality of first gas moisture sensors may be pre-installed at a first location in the hydrogen internal combustion engine, and after receiving the gas moisture values ​​detected by the plurality of first gas moisture sensors, an average value of each gas moisture value is calculated, and the average value is used as the first exhaust gas moisture content. In this way, the obtained first exhaust gas moisture content can more accurately reflect the exhaust gas moisture content of the first location.

[0051] The first part may be the interior of the cylinder or the interior of the exhaust system. The cylinder and the exhaust system are both part of the hydrogen internal combustion engine. The exhaust system includes components such as a supercharger volute, an exhaust pipe, and an exhaust tail pipe.

[0052] For example, a plurality of first gas moisture content sensors may be arranged on the inner wall of the cylinder, and after receiving the gas moisture content values ​​detected by the plurality of first gas moisture content sensors, the average value of each gas moisture content value is calculated, and the average value is used as the first exhaust gas moisture content. In this way, the obtained first exhaust gas moisture content can more accurately reflect the exhaust gas moisture content inside the cylinder.

[0053] S20. When the water content of the first exhaust gas is greater than or equal to the first preset value, controlling the hydrogen internal combustion engine to perform a first scavenging operation.

[0054] The first preset value is a gas water content value that meets the rust prevention requirements, that is, when the first tail gas water content is greater than or equal to the first preset value, the probability of rusting at the first part of the hydrogen internal combustion engine is relatively high, and the rust prevention requirements are not met at this time. The first preset value can be pre-set according to empirical data or experimental data. The first tail gas water content is greater than or equal to the first preset value, indicating that the tail gas water content of the first part of the hydrogen internal combustion engine does not meet the rust prevention requirements, and the tail gas water content of the first part needs to be reduced, so it is necessary to perform a scavenging operation. Specifically, the starter of the hydrogen internal combustion engine can be controlled to drive the hydrogen internal combustion engine to perform the first scavenging operation. When performing the scavenging operation, the starter of the internal combustion engine is controlled to start the starter, and the starter is meshed with the flywheel ring gear of the internal combustion engine. At this time, the hydrogen injection valve is in a closed state and hydrogen fuel will not be injected. The starter drags the crank-connecting rod mechanism of the internal combustion engine to rotate, driving the piston to move upward, and the internal combustion engine enters the exhaust working mode to achieve the purpose of sweeping the high gas water content tail gas in the cylinder.

[0055] S30. When the duration of the first scavenging operation reaches a first preset duration, return to the step of obtaining a first exhaust gas water content at a first location in the hydrogen internal combustion engine.

[0056] To prevent the starter from overheating due to long working time, the dragging time is set not to exceed the first preset duration. The first preset duration can be pre-set based on empirical data or experimental data, for example, it can be 12s or other durations. When the duration of the first scavenging operation reaches the first preset duration, a large part of the exhaust gas with high water content in the first part is discharged. At this time, the step of obtaining the first exhaust gas water content in the first part of the hydrogen internal combustion engine is returned, and the cycle is executed until the first exhaust gas water content is less than the first preset value, and then the subsequent operation is performed.

[0057] For example, the first preset time length may be pre-set according to the first exhaust gas moisture content ω of the first part, wherein the relationship between the first preset time length t1 and the first exhaust gas moisture content ω is:

[0058] t1=-136ω 2 +114ω-11,

[0059] When 0<t1≤first threshold, the control makes the hydrogen internal combustion engine start and perform the first scavenging operation until the first preset duration is reached. The whole process only needs to start the hydrogen internal combustion engine once; when t1>first threshold, the control makes the hydrogen internal combustion engine start multiple times. The sum of the duration of the first scavenging operation after each start in the multiple starts is the first preset duration t1. The duration of the first scavenging operation after each start does not exceed the first threshold. This can avoid the starter from running too long for a single time, and effectively avoid the starter from overheating due to a single long operation. The interval between two adjacent starts can be set according to actual application needs, for example, it can be set to 3s or other durations, so that the starter can be started again after cooling down. In addition, after each start of the starter, the sensor detection data can be called to perform a cleaning strategy test. If the test result shows that the current cleaning strategy is not suitable, the current cleaning strategy can be adjusted. The first threshold can be pre-set according to actual needs, for example, a duration of 12s or other durations.

[0060] The relationship between the first preset time length t1 and the first exhaust gas moisture content ω can be obtained by fitting historical data. In an example, the fitting curve of the relationship is as follows: Figure 3 shown.

[0061] In some embodiments, when the first exhaust gas moisture content is less than the first preset value, the exhaust gas moisture content in the first portion meets the rust prevention requirement, and the hydrogen internal combustion engine can be powered off, and the starter of the hydrogen internal combustion engine can be powered off.

[0062] The execution subject of the scavenging control method of the hydrogen internal combustion engine in the embodiment of the present application includes but is not limited to the automobile electronic control unit ECU.

[0063] refer to Figure 4 As shown, in other embodiments, in order to further reduce the water content of the exhaust gas inside the hydrogen internal combustion engine, the control method may also include:

[0064] S40. When the first exhaust gas water content is less than a first preset value, obtain a second exhaust gas water content at a second location in the hydrogen internal combustion engine.

[0065] The water content of the second exhaust gas at the second part in the hydrogen internal combustion engine is obtained so as to further reduce the water content of the exhaust gas at the second part subsequently.

[0066] In some embodiments, obtaining a second exhaust gas moisture content at a second location in the hydrogen internal combustion engine may include: receiving a second exhaust gas moisture content detected by a second gas moisture content sensor, where the second gas moisture content sensor is disposed at the second location.

[0067] In another embodiment, a plurality of second gas moisture sensors may be pre-installed at a second location in the hydrogen internal combustion engine, and after receiving the gas moisture values ​​detected by the plurality of second gas moisture sensors, an average value of each gas moisture value is calculated, and the average value is used as the second exhaust gas moisture content. In this way, the obtained second exhaust gas moisture content can more accurately reflect the exhaust gas moisture content of the second location.

[0068] Exemplarily, the first part is the interior of the cylinder, and the second part is the interior of the exhaust system. Thus, the first exhaust gas water content inside the cylinder is first obtained, and then when the first exhaust gas water content is less than the first preset value, the second exhaust gas water content inside the exhaust system is obtained.

[0069] Exemplarily, the first part is the interior of the exhaust system, and the second part is the interior of the cylinder. In this way, the first exhaust gas water content inside the exhaust system is first obtained, and then when the first exhaust gas water content is less than the first preset value, the second exhaust gas water content inside the cylinder is obtained.

[0070] Specifically, the interior of the exhaust system includes the interior of the supercharger volute, the interior of the exhaust pipe or the interior of the exhaust tail pipe, that is, the exhaust gas moisture content inside the supercharger volute, the interior of the exhaust pipe or the interior of the exhaust tail pipe can be obtained.

[0071] S50. When the water content of the second exhaust gas is greater than or equal to the second preset threshold, controlling the hydrogen internal combustion engine to perform a second scavenging operation.

[0072] The second tail gas moisture content is the tail gas moisture content of the second part. If the second tail gas moisture content is greater than or equal to the second preset threshold, it means that the tail gas moisture content of the second part is too high, which makes the second part easy to rust, so it is necessary to perform a second scavenging operation. Specifically, the starter of the hydrogen internal combustion engine can be controlled to drive the hydrogen internal combustion engine to perform the second scavenging operation.

[0073] S60. When the duration of the second scavenging operation reaches a second preset duration, return to the step of obtaining a second exhaust gas water content at a second location in the hydrogen internal combustion engine.

[0074] The second preset duration may be equal to or different from the first preset duration. The second preset duration is also set to prevent the starter from overheating due to long working time. When the duration of the second scavenging operation reaches the second preset duration, a large part of the exhaust gas with high water content in the hydrogen internal combustion engine is discharged again. At this time, the step of obtaining the second exhaust gas water content at the second part of the hydrogen internal combustion engine is returned and executed in a loop until the second exhaust gas water content is less than the second preset value, and then subsequent operations are performed.

[0075] For example, the second preset time length for the starter to perform the second scavenging operation is determined according to the second exhaust gas moisture content Ψ detected by the sensor at the second location, wherein the relationship between the second preset time length t2 and the second exhaust gas moisture content Ψ is:

[0076] t2=-57Ψ 2 +72Ψ-9,

[0077] When 0<t2≤the first threshold, the control makes the hydrogen internal combustion engine start and perform the second scavenging operation until the second preset duration is reached. The whole process only needs to start the hydrogen internal combustion engine once; when t2>the first threshold, the control makes the hydrogen internal combustion engine start multiple times. The sum of the duration of the first scavenging operation after each start in the multiple starts is the second preset duration t2. The duration of the first scavenging operation after each start does not exceed the first threshold, which can avoid the starter from running too long for a single time, and effectively avoid the starter from overheating due to a single running time being too long. The interval between two adjacent starts can be set according to actual application needs, for example, it can be set to a duration of 3s, so that the starter can be started again after cooling down. The first threshold can be pre-set according to actual needs, for example, a duration of 12s. In addition, the sensor detection data can be called to perform a cleaning strategy test after each start of the starter. If the test result shows that the current cleaning strategy is not suitable, the current cleaning strategy can be adjusted.

[0078] The relationship between the second preset time length t2 and the second exhaust gas moisture content Ψ can be obtained by fitting historical data. In an example, the fitting curve of the relationship is as follows: Figure 5 shown.

[0079] In some implementations, the control method may further include:

[0080] S70: When the water content of the second exhaust gas is less than a second preset threshold, control the hydrogen internal combustion engine to power off.

[0081] Since the first exhaust gas water content is detected before each detection of the second exhaust gas water content and the first exhaust gas water content is less than the first preset value, when the second exhaust gas water content is less than the second preset threshold, the first exhaust gas water content is also less than the first preset value, which means that after the scavenging operation, the internal exhaust gas water content of the hydrogen internal combustion engine has reached the rust prevention requirement, that is, the starter can be controlled to shut down, the hydrogen internal combustion engine can be controlled to power off, and the entire vehicle can be powered off.

[0082] In some embodiments, the exhaust gas moisture content detection may continue to be performed on other parts inside the hydrogen internal combustion engine, and a scavenging operation may be performed when the exhaust gas moisture content does not meet the rust prevention requirements, which will not be described in detail here.

[0083] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0084] refer to Figure 6 As shown, a specific example of a scavenging control method, the specific process may include the following steps:

[0085] 1) Multiple gas water content sensors are arranged in the cylinder, crankcase, turbocharger volute, exhaust manifold and exhaust tail pipe of the hydrogen internal combustion engine.

[0086] 2) When a normally operating hydrogen internal combustion engine receives a stop command, the hydrogen supply valve is first disconnected.

[0087] 3) After the hydrogen rail pressure continues to decrease, the hydrogen injection valve cannot be opened, the in-cylinder injection action cannot be completed, and the internal combustion engine is shut down. At this time, the fuel in the hydrogen supply pipeline is consumed, preventing the risk of leakage in the later stage.

[0088] 4) After the internal combustion engine is turned off, the water content ω of the gas in the cylinder is detected.

[0089] a) If the gas moisture content ω<α, continue to execute the next work instruction.

[0090] The value of α may be, for example, 0.05, 0.03, 0.04, 0.06, 0.07, etc., and may be specifically selected according to the type of hydrogen internal combustion engine, differences in material technology, etc.

[0091] b) If the gas moisture content ω≥α, the starter of the internal combustion engine is controlled to start, and the starter is meshed with the flywheel ring gear of the internal combustion engine. At this time, the hydrogen injection valve is in a closed state and will not inject hydrogen fuel. The starter drags the crank-connecting rod mechanism of the internal combustion engine to rotate, and the piston moves upward to enter the exhaust working cycle, so as to achieve the purpose of clearing the exhaust gas with high gas moisture content in the cylinder. In order to prevent the starter from overheating, the dragging time is set not to exceed the preset time.

[0092] The preset time length may be set according to experimental data or empirical data. A specific example of the preset time length may be 12 seconds.

[0093] For example, the starter working time t1 can be determined according to the water content of the gas in the cylinder ω, wherein the relationship between the starter drag engine scavenging time t1 and the gas water content ω is:

[0094] t1=-136ω 2 +114ω-11,

[0095] When 0<t1≤first threshold, the starter only needs to be started once; when t1>first threshold, it needs to be started multiple times, and the running time of the starter after each start does not exceed the first threshold. The interval between two adjacent starts can be set according to actual application needs, for example, it can be set to 3s. In addition, after each start of the starter, the sensor detection data can be called to test the cleaning strategy. If the test result shows that the current cleaning strategy is not suitable, the current cleaning strategy can be adjusted.

[0096] After the starter completes the scavenging in the cylinder of one working cycle, the gas moisture content ω is continuously detected by the gas moisture content sensor in the cylinder, and the process is executed cyclically until the condition of ω<α is reached to enter the next working step.

[0097] 5) If the water content of the gas in the cylinder ω<α, continue to detect the water content of the gas in the exhaust system (supercharger volute) Ψ.

[0098] a) If the gas moisture content Ψ<β, continue to execute the next work instruction.

[0099] When detecting the water content of the gas in the exhaust system, different β values ​​are taken according to the differences in the model and material process of the hydrogen internal combustion engine. For example, β can be 0.10, 0.08, 0.2, 0.3, etc.

[0100] b) If the gas water content Ψ ≥ β, the starter of the internal combustion engine is started, and the starter is meshed with the flywheel gear ring of the internal combustion engine. At this time, the hydrogen injection valve is in a closed state and will not inject hydrogen fuel, dragging the crank-connecting rod mechanism of the internal combustion engine to rotate, and the piston moves upward to enter the exhaust working cycle, so as to achieve the purpose of sweeping the high gas water content exhaust gas in the cylinder. In order to prevent the starter from overheating, the dragging time is set not to exceed the preset time. A specific example of the preset time is, for example, 12s. After the scavenging operation of a working cycle of the starter is completed, the gas water content sensor arranged in the exhaust system continues to detect the gas water content Ψ, and executes it cyclically until the condition of Ψ < β is met to enter the next working stage.

[0101] The working time of the starter is determined according to the gas moisture content Ψ detected by the exhaust system sensor, where the relationship between the starter drag engine scavenging time t2 and the gas moisture content Ψ is:

[0102] t2=-57Ψ 2 +72Ψ-9,

[0103] When 0<t1≤first threshold, the starter only needs to be started once; when t1>first threshold, it needs to be started multiple times, and the running time of the starter after each start does not exceed the first threshold. The interval between two adjacent starts can be set according to actual application needs, for example, it can be set to 3s. The first threshold is, for example, 12s. In addition, after each start of the starter, the sensor detection data can be called to perform a cleaning strategy test. If the test result shows that the current cleaning strategy is not suitable, the current cleaning strategy can be adjusted.

[0104] 6) When the exhaust gas moisture content Ψ in the exhaust system (supercharger volute) is less than β, the gas moisture content in the cylinder, exhaust duct, exhaust pipe, supercharger and other exhaust system components is within the anti-corrosion safety limit, the internal combustion engine is powered off, and the parking command is completed.

[0105] The above α is the gas moisture content threshold for the rust risk control in the cylinder, and β is the gas moisture content threshold for the rust risk control at the turbocharger volute, which are obtained through reliability tests. Different materials and anti-rust coatings will have different thresholds.

[0106] The arrangement position of the gas moisture content sensor is not limited to the supercharger volute, but can also be arranged in the exhaust pipe, exhaust tail pipe and other positions, and the control strategy is similar.

[0107] Hydrogen internal combustion engines are important zero-carbon power that complies with the dual-carbon development strategy. In response to the corrosion problems of cylinders and exhaust systems in hydrogen internal combustion engines, this example reduces the occurrence of corrosion by reducing the water content of exhaust gas in the cylinder and exhaust system through scavenging. The scavenging control method in this example discharges the exhaust gas with high gas water content, reduces the water content of exhaust gas in the cylinder and exhaust system through scavenging, and thus greatly reduces the probability of rust in hydrogen internal combustion engines.

[0108] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0109] refer to Figure 7 As shown, another embodiment of the present application provides a scavenging control device for a hydrogen internal combustion engine, comprising:

[0110] An acquisition module, used for acquiring a first tail gas water content at a first location in the hydrogen internal combustion engine when the hydrogen internal combustion engine is turned off;

[0111] a control module, controlling the hydrogen internal combustion engine to perform a first scavenging operation when the first exhaust gas water content is greater than or equal to a first preset value;

[0112] The acquisition module is also used for returning to the step of acquiring a first exhaust gas water content at a first location in the hydrogen internal combustion engine when the duration of the first scavenging operation reaches a first preset duration.

[0113] Exemplarily, the acquisition module may also be used to acquire a second exhaust gas water content at a second location in the hydrogen internal combustion engine when the first exhaust gas water content is less than a first preset value;

[0114] The control module may also be used to control the hydrogen internal combustion engine to perform a second scavenging operation when the water content of the second exhaust gas is greater than or equal to a second preset threshold;

[0115] The acquisition module may also be configured to return to the step of acquiring a second exhaust gas water content at a second location within the hydrogen internal combustion engine when the duration of the second scavenging operation reaches a second preset duration.

[0116] The control module may also be configured to control the hydrogen internal combustion engine to power off when the water content of the second exhaust gas is less than a second preset threshold.

[0117] Exemplarily, the first location is inside the cylinder and the second location is inside the exhaust system, or the first location is inside the exhaust system and the second location is inside the cylinder.

[0118] Exemplarily, the interior of the exhaust system includes the interior of a supercharger volute, the interior of an exhaust pipe, or the interior of an exhaust tail pipe.

[0119] Exemplarily, the acquisition module is further specifically used to receive a first exhaust gas moisture content detected by a first gas moisture content sensor, and the first gas moisture content sensor is arranged at the first position.

[0120] Exemplarily, the acquisition module is further specifically used to receive a second exhaust gas moisture content detected by a second gas moisture content sensor, and the second gas moisture content sensor is arranged at the second position.

[0121] The scavenging control device of the hydrogen internal combustion engine in the embodiment of the present application can reduce the water content of the exhaust gas inside the hydrogen internal combustion engine to a level that meets the rust prevention requirements through the scavenging operation, thereby greatly reducing the probability of rust generation, keeping the water content of the exhaust gas inside the hydrogen internal combustion engine at a low level, keeping the hydrogen internal combustion engine in a good working condition, and extending the service life of the hydrogen internal combustion engine.

[0122] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0123] Another embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a method of any of the above embodiments.

[0124] refer to Figure 8 As shown, the electronic device 10 may include: a processor 100, a memory 101, a bus 102 and a communication interface 103, and the processor 100, the communication interface 103 and the memory 101 are connected via the bus 102; the memory 101 stores a computer program that can be run on the processor 100, and when the processor 100 runs the computer program, the scavenging control method for the hydrogen internal combustion engine provided in any of the aforementioned embodiments of the present application is executed.

[0125] The memory 101 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the device network element and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0126] The bus 102 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory 101 is used to store a program, and the processor 100 executes the program after receiving an execution instruction. The method disclosed in any implementation of the aforementioned embodiment of the present application may be applied to the processor 100, or implemented by the processor 100.

[0127] The processor 100 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 100 or an instruction in the form of software. The above processor 100 may be a general-purpose processor, which may include a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 101, and the processor 100 reads the information in the memory 101 and completes the steps of the above method in combination with its hardware.

[0128] The electronic device provided in the embodiment of the present application and the method provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the method adopted, operated or implemented by them.

[0129] Another embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. The computer program is executed by a processor to implement the scavenging control method of a hydrogen internal combustion engine according to any of the above embodiments. Fig. 9 As shown, the computer-readable storage medium shown is a CD 20 on which a computer program (ie, a program product) is stored. When the computer program is run by a processor, the method provided by any of the aforementioned embodiments will be executed.

[0130] It should be noted that examples of computer-readable storage media may also include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical or magnetic storage media, which are not listed here one by one.

[0131] The computer-readable storage medium provided in the above-mentioned embodiments of the present application and the method provided in the embodiments of the present application are based on the same inventive concept and have the same beneficial effects as the method adopted, run or implemented by the application program stored therein.

[0132] It should be noted that:

[0133] The term "module" is not intended to be limited to a specific physical form. Depending on the specific application, a module can be implemented as hardware, firmware, software, and / or a combination thereof. In addition, different modules can share common components or even be implemented by the same components. There may or may not be clear boundaries between different modules.

[0134] The algorithm and display provided herein are not inherently related to any specific computer, virtual device or other equipment. Various general devices can also be used together with examples based on this. According to the above description, it is obvious to construct the structure required for this type of device. In addition, the application is not directed to any specific programming language yet. It should be understood that various programming languages ​​can be utilized to realize the content of the application described herein, and the description made to specific languages ​​above is for the purpose of disclosing the best mode of implementation of the application.

[0135] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0136] The above embodiments only express the implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A scavenging control method for a hydrogen internal combustion engine, characterized in that: include: When the hydrogen internal combustion engine is turned off, obtaining a first exhaust gas water content at a first location in the hydrogen internal combustion engine; When the first exhaust gas water content is greater than or equal to a first preset value, controlling the hydrogen internal combustion engine to perform a first scavenging operation; When the duration of the first scavenging operation reaches a first preset duration, returning to the step of obtaining the first exhaust gas water content at a first location in the hydrogen internal combustion engine, the step is executed in a loop until the first exhaust gas water content is less than the first preset value, and a preset interval duration is provided between two adjacent scavenging operations; When the first exhaust gas water content is less than a first preset value, obtaining a second exhaust gas water content at a second location in the hydrogen internal combustion engine; When the water content of the second exhaust gas is greater than or equal to a second preset threshold, controlling the hydrogen internal combustion engine to perform a second scavenging operation; When the duration of the second scavenging operation reaches a second preset duration, returning to the step of obtaining a second exhaust gas water content at a second location in the hydrogen internal combustion engine; The first location is the interior of a cylinder and the second location is the interior of an exhaust system.

2. The method according to claim 1, characterized in that The method further comprises: When the water content of the second exhaust gas is less than a second preset threshold, the hydrogen internal combustion engine is controlled to be powered off.

3. The method according to claim 1, characterized in that The interior of the exhaust system includes the interior of a supercharger volute, the interior of an exhaust pipe, or the interior of an exhaust tail pipe.

4. The method according to claim 1 or 2, characterized in that: The obtaining of a first exhaust gas moisture content at a first location in the hydrogen internal combustion engine includes: receiving the first exhaust gas moisture content detected by a first gas moisture content sensor, wherein the first gas moisture content sensor is disposed at the first location.

5. The method according to claim 1 or 2, characterized in that: The obtaining of a second exhaust gas moisture content at a second location in the hydrogen internal combustion engine includes: receiving a second exhaust gas moisture content detected by a second gas moisture content sensor, wherein the second gas moisture content sensor is disposed at the second location.

6. A scavenging control device for a hydrogen internal combustion engine, characterized in that: include: An acquisition module, used for acquiring a first tail gas water content at a first location in the hydrogen internal combustion engine when the hydrogen internal combustion engine is turned off; a control module, controlling the hydrogen internal combustion engine to perform a first scavenging operation when the first exhaust gas water content is greater than or equal to a first preset value; The acquisition module is further configured to return to the step of acquiring the first exhaust gas water content at the first location in the hydrogen internal combustion engine when the duration of the first scavenging operation reaches the first preset duration, and execute the step in a loop until the first exhaust gas water content is less than the first preset value, and a preset interval duration is provided between two adjacent scavenging operations; The acquisition module may also be used to acquire a second exhaust gas water content at a second location in the hydrogen internal combustion engine when the first exhaust gas water content is less than a first preset value; The control module may also be used to control the hydrogen internal combustion engine to perform a second scavenging operation when the water content of the second exhaust gas is greater than or equal to a second preset threshold; The acquisition module may also be used to return to the step of acquiring a second exhaust gas water content at a second location in the hydrogen internal combustion engine when the duration of the second scavenging operation reaches a second preset duration; The first location is the interior of a cylinder and the second location is the interior of an exhaust system.

7. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the scavenging control method for a hydrogen internal combustion engine as claimed in any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement the scavenging control method for a hydrogen internal combustion engine according to any one of claims 1 to 5.

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