CN118499140A - Control method and control device for hydrogen engine, electronic equipment and storage medium - Google Patents
Control method and control device for hydrogen engine, electronic equipment and storage medium Download PDFInfo
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- CN118499140A CN118499140A CN202410973265.3A CN202410973265A CN118499140A CN 118499140 A CN118499140 A CN 118499140A CN 202410973265 A CN202410973265 A CN 202410973265A CN 118499140 A CN118499140 A CN 118499140A
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 428
- 239000001257 hydrogen Substances 0.000 title claims abstract description 428
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 409
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000011217 control strategy Methods 0.000 claims abstract description 39
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 17
- 230000001133 acceleration Effects 0.000 claims description 52
- 238000004590 computer program Methods 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 6
- 230000002829 reductive effect Effects 0.000 description 12
- 230000008859 change Effects 0.000 description 11
- 238000012545 processing Methods 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000802 evaporation-induced self-assembly Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011269 treatment regimen Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/225—Leakage detection
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The application discloses a control method and a control device of a hydrogen engine, electronic equipment and a storage medium. The control method of the hydrogen engine comprises the following steps: acquiring the hydrogen concentration of a preset hydrogen leakage prone position of the hydrogen engine; determining a preset hydrogen concentration interval to which the hydrogen concentration belongs according to the hydrogen concentration and a plurality of preset hydrogen concentration intervals; executing a control strategy corresponding to a preset hydrogen concentration interval to which the hydrogen concentration belongs. The control method of the hydrogen engine can execute the corresponding control strategy according to the preset hydrogen concentration interval to which the hydrogen concentration belongs, flexibly and effectively treat the hydrogen leakage condition, reduce the safety risk caused by the hydrogen leakage and improve the use safety performance of the hydrogen engine.
Description
Technical Field
The present application relates to the technical field of hydrogen engines, and in particular, to a control method and a control device for a hydrogen engine, an electronic device, and a storage medium.
Background
World petroleum resource shortage and ecological environment protection are major challenges facing humans. The large amount of fossil energy is used, a series of problems such as environment, ecology and global climate change are brought, and the energy transformation and upgrading are accelerated to become conscious actions of all countries of the world for actively breaking the dilemma. Development and application of alternative fuels for automobiles have become an important issue in the field of automobile engines.
At present, the fuel of the engine in the market is mainly gasoline and diesel oil, which causes a series of problems of environmental, ecological, global climate change and the like, the hydrogen energy source becomes the important energy source in the future and is the consensus of the scientific community, and the hydrogen engine is an important power supply device, but in actual application, the ignition limit of the hydrogen is very wide, so the safety requirement for the hydrogen engine in use is very high. Hydrogen engines, also known as hydrogen fuelled engines or hydrogen internal combustion engines, are one type of internal combustion engine that uses hydrogen as a fuel. The hydrogen engine is one of important tools for realizing zero-carbon combustion and is in a more important position in the technical field of new energy, but the related control strategy of the hydrogen engine is imperfect, so that the situation of hydrogen leakage is easy to occur, and a large potential safety hazard exists.
The statements made above merely serve to provide background information related to the present disclosure and may not necessarily constitute prior art.
Disclosure of Invention
Aiming at the problems that hydrogen leakage is easy to occur and a large potential safety hazard exists in a hydrogen engine in the related technology, the application provides a control method, a control device, electronic equipment and a storage medium of the hydrogen engine, so that the hydrogen leakage condition is flexibly and effectively treated, and the safety risk caused by the hydrogen leakage is reduced. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to an aspect of an embodiment of the present application, there is provided a control method of a hydrogen engine, including:
acquiring the hydrogen concentration of a preset hydrogen leakage prone position of the hydrogen engine;
Determining a preset hydrogen concentration interval to which the hydrogen concentration belongs according to the hydrogen concentration and a plurality of preset hydrogen concentration intervals;
Executing a control strategy corresponding to a preset hydrogen concentration interval to which the hydrogen concentration belongs.
In some embodiments of the present application, the obtaining the hydrogen concentration of the preset hydrogen leakage prone position of the hydrogen engine includes:
And receiving the hydrogen concentration detected by a hydrogen concentration sensor, wherein the hydrogen concentration sensor is arranged at a preset hydrogen leakage easy position of the hydrogen engine.
In some embodiments of the present application, the plurality of preset hydrogen concentration intervals includes a first preset interval and a second preset interval, and a right endpoint value of the first preset interval is equal to a left endpoint value of the second preset interval.
In some embodiments of the present application, the executing a control strategy corresponding to a preset hydrogen concentration interval to which the hydrogen concentration belongs includes:
Under the condition that the hydrogen concentration belongs to the first preset interval, judging that the running state of the hydrogen engine is normal, and controlling the hydrogen engine to keep the current running state;
Judging whether the hydrogen engine is in a running state or not under the condition that the hydrogen concentration belongs to the second preset interval;
if the vehicle is in the running state, executing a running state control strategy;
and if the vehicle is not in a driving state, controlling the hydrogen engine to stop running.
In some embodiments of the present application, the second preset interval includes a third preset interval, a fourth preset interval, and a fifth preset interval, a right endpoint value of the third preset interval is equal to a left endpoint value of the fourth preset interval, a right endpoint value of the fourth preset interval is equal to a left endpoint value of the fifth preset interval, and an intersection between any two of the third preset interval, the fourth preset interval, and the fifth preset interval is 0; the executing the running state control strategy includes:
controlling to send out an alarm signal for prompting hydrogen leakage under the condition that the hydrogen concentration belongs to the third preset interval;
When the hydrogen concentration belongs to the fourth preset interval, controlling to send out an alarm signal for prompting hydrogen leakage and controlling to enable the torque rotating speed of the hydrogen engine to be converted into a limp-home mode, and controlling the hydrogen engine to operate in the limp-home mode;
and under the condition that the hydrogen concentration belongs to the fifth preset interval, controlling to send out an alarm signal for prompting serious leakage of hydrogen and controlling to enable the torque rotating speed of the hydrogen engine to be converted into an idle state.
In some embodiments of the application, the controlling transitions the torque speed of the hydrogen engine to a limp home mode, comprising:
acquiring a plurality of hydrogen leakage rates according to the hydrogen concentration acquired in real time;
Determining a first acceleration required for converting the torque rotation speed of the hydrogen engine into a limp-home mode according to the plurality of hydrogen leakage rates;
Control converts the torque rotation speed of the hydrogen engine into a limp-home mode at the first acceleration.
In some embodiments of the application, the controlling transitions the torque rotation speed of the hydrogen engine to an idle state, comprising:
acquiring a plurality of hydrogen leakage rates according to the hydrogen concentration acquired in real time;
determining a second acceleration required for converting the torque rotation speed of the hydrogen engine into an idle state according to the hydrogen leakage rates;
control switches the torque rotation speed of the hydrogen engine to an idle state at the second acceleration.
According to another aspect of an embodiment of the present application, there is provided a control device of a hydrogen engine including:
The hydrogen concentration acquisition module is used for acquiring the hydrogen concentration of a preset hydrogen leakage easy position of the hydrogen engine;
The hydrogen concentration interval determining module is used for determining a preset hydrogen concentration interval to which the hydrogen concentration belongs according to the hydrogen concentration and a plurality of preset hydrogen concentration intervals;
and the control strategy executing module is used for executing a control strategy corresponding to a preset hydrogen concentration interval to which the hydrogen concentration belongs.
According to another aspect of the embodiment of the present application, there is provided an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the computer program to implement the method for controlling a hydrogen engine according to any of the embodiments of the present application.
According to another aspect of an embodiment of the present application, there is provided a computer-readable storage medium having stored thereon a computer program that is executed by a processor to implement the control method of a hydrogen engine according to any of the embodiments of the present application.
One of the technical solutions provided in one aspect of the embodiments of the present application may include the following beneficial effects:
According to the control method for the hydrogen engine, provided by the embodiment of the application, the hydrogen concentration of the position where the preset hydrogen leakage of the hydrogen engine is easy to occur is obtained, the preset hydrogen concentration interval to which the hydrogen concentration belongs is determined according to the hydrogen concentration and the preset hydrogen concentration intervals, and the control strategy corresponding to the preset hydrogen concentration interval to which the hydrogen concentration belongs is executed, so that the corresponding control strategy can be executed according to the preset hydrogen concentration interval to which the hydrogen concentration belongs, the hydrogen leakage condition can be flexibly and effectively treated, the safety risk caused by the hydrogen leakage is reduced, and the use safety performance of the hydrogen engine is improved.
The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present application can be more clearly understood, and the following specific embodiments of the present application will be more specifically described below.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
Fig. 1 shows a flow chart of a control method of a hydrogen engine according to an embodiment of the present application.
Fig. 2 shows a flowchart of a control strategy for performing a control strategy corresponding to a preset hydrogen concentration interval to which the hydrogen concentration belongs, according to an embodiment of the present application.
Fig. 3 shows a flowchart of a control method of the hydrogen engine of one specific example of the present application.
Fig. 4 is a block diagram showing a control apparatus of a hydrogen engine according to an embodiment of the present application.
Fig. 5 shows a block diagram of an electronic device according to an embodiment of the application.
FIG. 6 shows a schematic diagram of a computer-readable storage medium of one embodiment of the application.
Detailed Description
The present application will be further described with reference to the drawings and the specific embodiments in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Interpretation of related terms:
the ignition limit refers to the concentration range in which the combustible gas forms a uniform mixture in the combustion-supporting gas at a certain temperature and pressure, is ignited and can propagate flame.
The hydrogen leakage problem of the hydrogen engine is one of the problems focused on, and in view of the problems existing in the related art, the embodiment of the application provides a control method of the hydrogen engine, which is used for obtaining the hydrogen concentration of the preset hydrogen leakage prone position of the hydrogen engine, determining the preset hydrogen concentration interval to which the hydrogen concentration belongs according to the hydrogen concentration and a plurality of preset hydrogen concentration intervals, and executing a control strategy corresponding to the preset hydrogen concentration interval to which the hydrogen concentration belongs, so that the corresponding control strategy can be executed according to the preset hydrogen concentration interval to which the hydrogen concentration belongs, different hydrogen leakage conditions can be effectively processed, the safety risk caused by the hydrogen leakage is reduced, the use safety performance of the hydrogen engine is improved, and the popularization and the use of hydrogen energy are facilitated.
A control method of a hydrogen engine according to an embodiment of the present application is described below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present application provides a control method of a hydrogen engine, which may include:
s10, acquiring the hydrogen concentration of a preset hydrogen leakage prone position of the hydrogen engine.
The preset hydrogen leakage prone position of the hydrogen engine may be, for example, a region which is located above the hydrogen engine and has good sealing performance, or the inside of the hydrogen engine compartment. Specifically, the hydrogen concentration detected by the hydrogen concentration sensor may be received, so as to obtain the hydrogen concentration of the preset hydrogen leakage prone position of the hydrogen engine, where the hydrogen concentration sensor is disposed.
The execution main body of the control method of the hydrogen engine in the embodiment of the application may be an electronic control unit (electronic control unit, abbreviated as ECU) of the vehicle, and the electronic control unit may be electrically connected to the hydrogen concentration sensor and the hydrogen engine, respectively.
S20, determining a preset hydrogen concentration interval to which the hydrogen concentration belongs according to the hydrogen concentration and a plurality of preset hydrogen concentration intervals.
The plurality of preset hydrogen concentration intervals include a first preset interval and a second preset interval, wherein a right endpoint value of the first preset interval is equal to a left endpoint value of the second preset interval. The second preset interval comprises a third preset interval, a fourth preset interval and a fifth preset interval, the right end point value of the third preset interval is equal to the left end point value of the fourth preset interval, the right end point value of the fourth preset interval is equal to the left end point value of the fifth preset interval, and the intersection between any two intervals of the third preset interval, the fourth preset interval and the fifth preset interval is 0.
For example, a first preset interval (- +, 0.1 ℃), a second preset interval (0.1 ℃, + ], a third preset interval (0.1 ℃,1 ℃), a fourth preset interval (1 ℃,3 ℃), and a fifth preset interval (3 ℃, + ]), i.e., the second preset interval is composed of the third preset interval, the fourth preset interval, and the fifth preset interval.
S30, executing a control strategy corresponding to a preset hydrogen concentration interval to which the hydrogen concentration belongs.
Illustratively, referring to fig. 2, executing a control strategy corresponding to a preset hydrogen concentration interval to which the hydrogen concentration belongs may include:
S301, judging that the running state of the hydrogen engine is normal under the condition that the hydrogen concentration belongs to the first preset interval, and controlling the hydrogen engine to keep the current running state;
S302, judging whether the hydrogen engine is in a running state or not under the condition that the hydrogen concentration belongs to the second preset interval;
S303, executing a running state control strategy if the vehicle is in a running state;
And S304, if the vehicle is not in a driving state, controlling the hydrogen engine to stop running.
Illustratively, the second preset interval includes a third preset interval, a fourth preset interval, and a fifth preset interval, a right endpoint value of the third preset interval is equal to a left endpoint value of the fourth preset interval, a right endpoint value of the fourth preset interval is equal to a left endpoint value of the fifth preset interval, and an intersection between any two of the third preset interval, the fourth preset interval, and the fifth preset interval is 0; executing the driving state control strategy may include:
Controlling to send out an alarm signal for prompting hydrogen leakage under the condition that the hydrogen concentration belongs to the third preset interval; when the hydrogen concentration belongs to the fourth preset interval, controlling to send out an alarm signal for prompting hydrogen leakage and controlling to enable the torque rotating speed of the hydrogen engine to be converted into a limp-home mode, and controlling the hydrogen engine to operate in the limp-home mode; and under the condition that the hydrogen concentration belongs to the fifth preset interval, controlling to send out an alarm signal for prompting serious leakage of hydrogen and controlling to enable the torque rotating speed of the hydrogen engine to be converted into an idle state.
The alarm signal may be an audible and visual alarm signal sent by an audible and visual alarm device, and the audible and visual alarm device may include a buzzer and an LED flash, for example, and the audible and visual alarm signal may include an audible signal sent by the buzzer and an optical signal sent by the LED flash, for example. The audible and visual alarm device is connected with the electronic control unit ECU.
In some embodiments, the controlling to shift the torque rotation speed of the hydrogen engine to a limp home mode may include: acquiring a plurality of hydrogen leakage rates according to the hydrogen concentration acquired in real time; determining a first acceleration required for converting the torque rotation speed of the hydrogen engine into a limp-home mode according to the plurality of hydrogen leakage rates; control transitions the torque speed of the hydrogen engine to a limp-home mode at a first acceleration.
The hydrogen engine torque in limp-home mode is about 60% of the normal torque.
And determining a first acceleration required by the conversion of the torque rotating speed of the hydrogen engine into the limp-home mode according to the plurality of hydrogen leakage rates, for example, if a plurality of continuous hydrogen leakage rates are always increasing to indicate that the hydrogen leakage trend is in a aggravated state, a corresponding larger acceleration can be adopted to convert the torque rotating speed of the hydrogen engine into the limp-home mode so as to reduce the safety risk brought by the hydrogen leakage. For another example, if a plurality of continuous hydrogen leak rates are continuously decreasing or unchanged, indicating that the hydrogen leak trend is in a reduced state or an unchanged state, a corresponding relatively small acceleration may be used to convert the torque rotation speed of the hydrogen engine into a limp-home mode, so as to avoid adverse effects on the hydrogen engine caused by too fast torque rotation speed reduction. The correspondence between the first acceleration and the hydrogen leak rate may be predetermined based on historical experience or experimental data.
For example, a plurality of hydrogen leak rates (the specific number may be set according to actual needs) may be calculated according to the hydrogen concentration acquired in real time, the acceleration of the hydrogen leak rate may be determined according to the hydrogen leak rate, and the corresponding first acceleration may be determined according to the acceleration of the hydrogen leak rate. The acceleration of the hydrogen leakage rate represents the change trend of the hydrogen leakage rate, if the acceleration of the hydrogen leakage rate is positive, the change trend of the hydrogen leakage rate becomes larger, the absolute value of the corresponding first acceleration determined according to the value of the acceleration of the hydrogen leakage rate is a relatively larger value, and the duration required for converting the torque rotation speed of the hydrogen engine into the limp mode by the first acceleration is controlled to be shorter, so that the safety risk brought by the hydrogen leakage is reduced. If the acceleration of the hydrogen leakage rate is a negative value or 0, the change trend of the hydrogen leakage rate becomes smaller or unchanged, and the absolute value of the corresponding first acceleration determined according to the value of the acceleration of the hydrogen leakage rate is a relatively smaller value, the time required for converting the torque rotation speed of the hydrogen engine into the limp mode by the first acceleration is controlled to be relatively longer, so that damage to the hydrogen engine caused by too fast change of the torque rotation speed can be reduced, and the service life of the hydrogen engine can be prolonged. In addition, different first accelerations are adopted according to the acceleration of the hydrogen leakage rate, so that a corresponding control mode can be adopted for the hydrogen engine according to different hydrogen leakage conditions, finer, more flexible and reasonable control of the hydrogen engine is realized, and the technical defects of imperfect related control strategies and single and inflexible control strategies of the hydrogen engine in the related technology are overcome.
In some embodiments, the controlling to shift the torque rotation speed of the hydrogen engine to the idle state may include: acquiring a plurality of hydrogen leakage rates according to the hydrogen concentration acquired in real time; determining a second acceleration required for converting the torque rotation speed of the hydrogen engine into an idle state according to the hydrogen leakage rates; control transitions the torque rotation speed of the hydrogen engine to an idle state at a second acceleration.
The idle state is a state in which the engine is operated at the lowest steady rotational speed.
And determining a second acceleration required by the conversion of the torque rotation speed of the hydrogen engine to the idle state according to the plurality of hydrogen leakage rates, for example, if a plurality of continuous hydrogen leakage rates are always increasing to indicate that the hydrogen leakage trend is in a aggravated state, a corresponding larger acceleration can be adopted to convert the torque rotation speed of the hydrogen engine to the idle state so as to reduce the safety risk brought by the hydrogen leakage. For another example, if a plurality of continuous hydrogen leak rates are continuously reduced or unchanged, indicating that the hydrogen leak trend is in a reduced state or an unchanged state, a corresponding relatively small acceleration may be used to convert the torque rotation speed of the hydrogen engine into an idle state, so as to avoid adverse effects on the hydrogen engine caused by too fast torque rotation speed reduction. The correspondence between the second acceleration and the hydrogen leak rate may be predetermined based on historical experience or experimental data.
For example, a plurality of hydrogen leak rates (the specific number may be set according to actual needs) may be calculated according to the hydrogen concentration acquired in real time, the acceleration of the hydrogen leak rate may be determined according to the hydrogen leak rate, and the corresponding second acceleration may be determined according to the acceleration of the hydrogen leak rate. The acceleration of the hydrogen leakage rate represents the change trend of the hydrogen leakage rate, if the acceleration of the hydrogen leakage rate is positive, the change trend of the hydrogen leakage rate becomes larger, the absolute value of the corresponding second acceleration determined according to the value of the acceleration of the hydrogen leakage rate is a relatively larger value, and the time required for converting the torque rotation speed into the idle state by the second acceleration is relatively shorter, so that the safety risk brought by the hydrogen leakage is reduced. If the acceleration of the hydrogen leakage rate is a negative value or 0, the trend of the change of the hydrogen leakage rate becomes smaller or unchanged, the absolute value of the corresponding second acceleration determined according to the value of the acceleration of the hydrogen leakage rate is a relatively smaller value, and the time required for converting the torque rotation speed into the idle state by the second acceleration is relatively longer, so that the damage to the hydrogen engine caused by the too fast change of the torque rotation speed can be reduced, and the service life of the hydrogen engine is prolonged. In addition, different second accelerations are adopted according to the acceleration of the hydrogen leakage rate, so that a corresponding control mode can be adopted for the hydrogen engine according to different hydrogen leakage conditions, finer, more flexible and reasonable control of the hydrogen engine is realized, and the technical defects of imperfect related control strategies and single and inflexible control strategies of the hydrogen engine in the related technology are overcome.
Specifically, in the running state control strategy, correction calculation is performed on the down-torque slope increase model. Since the risk of hydrogen leakage is high, when its concentration rises too fast, a greater rate is required to reduce torque to increase safety. When the hydrogen concentration exceeds the threshold value of 0.1%, and the hydrogen engine is in a running state, the rate of decrease in torque is corrected in accordance with the rate of increase in hydrogen concentration. For example, the slope calculation is performed according to the average value of the integrated hydrogen concentration over a period of time (e.g., one minute), and if all three continuous slopes are positive numbers, it is indicated that the hydrogen leakage rate is increasing, i.e., the tendency of hydrogen leakage is increasing, and at this time, if the torque limiting condition (e.g., the hydrogen concentration exceeds 1%), the torque limiting rate is multiplied by a factor of 1.05 to accelerate the torque reduction. When all three slopes are negative, it is indicated that the hydrogen leakage rate is decreasing, i.e., the tendency of hydrogen leakage is decreasing, the factor 1.05 can be restored to the original factor, so that the rate of torque limiting can be reduced.
In a specific example, a hydrogen engine vehicle includes an electronic control unit ECU, and a hydrogen engine, a hydrogen concentration sensor, a vehicle speed sensor, and a rotational speed sensor, which are respectively connected to the ECU. The execution subject of the control method of the hydrogen engine of this example may be an electronic control unit ECU. Referring to fig. 3, in this example, the control method of the hydrogen engine may include the steps of:
After the hydrogen engine is electrified, firstly acquiring the hydrogen concentration detected by a hydrogen concentration sensor; the hydrogen concentration sensor detects the hydrogen concentration of the preset hydrogen leakage prone position of the hydrogen engine, and the preset hydrogen leakage prone position of the hydrogen engine can be, for example, a region which is located above the hydrogen engine and has good tightness or the inside of a hydrogen engine cabin.
When the hydrogen concentration is not more than 0.1% of the first preset threshold value, judging that the current leakage risk of the hydrogen is low, and the engine is in a safe state;
When the hydrogen concentration exceeds a first preset threshold value of 0.1%, the ECU judges whether the whole vehicle is in a running state or not, and if the whole vehicle is not in the running state, the hydrogen engine is controlled to stop running so as to carry out parking inspection.
And if the whole vehicle is in a running state, executing a running safety processing strategy.
When executing the safety treatment strategy in running, firstly continuously recording the hydrogen concentration, and judging whether the hydrogen concentration is higher than a second preset threshold value by 1%;
If the leakage risk is not higher than the second preset threshold value by 1%, sending out an alarm signal to remind related personnel (such as drivers) of the leakage risk currently, and reminding the related personnel of stopping and checking in a safe place;
if the torque speed is higher than the second preset threshold value by 1% but not higher than the third preset threshold value by 3%, an alarm signal is sent to remind related personnel of serious leakage of hydrogen, the torque speed is controlled to be smoothly transited to a limp mode (the torque of the limp mode is about 60% of the normal torque) within the related specified allowed time, and the vehicle stops and checks in the limp mode to reach a safety area.
If the hydrogen concentration exceeds the third preset threshold value by 3%, an alarm signal is sent to prompt related personnel (such as a driver) to generate serious leakage of hydrogen, the whole vehicle is controlled to gradually reduce the torque rotation speed within the related specified allowable time to be in an idle state, and a ventilation device is started until the vehicle is safely stopped, and the related personnel are checked after the vehicle is stopped.
The four preset intervals divided by the first preset threshold value 0.1%, the second preset threshold value 1% and the third preset threshold value 3% are as follows: the first preset interval (- ++0.1℃), the second preset interval (0.1 ℃, ++infinity ℃), the third preset interval (0.1 ℃,1 ℃), the fourth preset interval (1 ℃,3 ℃), and the fifth preset interval (3 ℃, ++infinity ℃).
In the safety strategy in the running process, after checking and processing and confirming that no hydrogen is leaked, the hydrogen engine can be started and run for a preset time in the safety mode, and the normal mode is entered after confirming that the fault is eliminated. And finally, after the control strategies under different hydrogen concentrations are summarized, confirming that no hydrogen leakage exists, and continuing to run safely.
In this example, based on the actually measured hydrogen concentration of the hydrogen concentration sensor located at the position where the hydrogen leakage is prone to occur, the possibility of the hydrogen leakage and the leakage degree in the hydrogen engine system are determined, then a control strategy for controlling the hydrogen engine is adopted, the hydrogen concentration is monitored in real time under running and non-running states on the control strategy, corresponding measures are taken, a method similar to a method of directly stopping the hydrogen engine when the hydrogen leakage occurs can be avoided, and the safety of the hydrogen engine compartment is effectively improved.
The foregoing description of various embodiments is intended to highlight differences between the various embodiments, which may be the same or similar to each other by reference, and is not repeated herein for the sake of brevity.
Referring to fig. 4, another embodiment of the present application provides a control apparatus of a hydrogen engine, including:
The hydrogen concentration acquisition module is used for acquiring the hydrogen concentration of a preset hydrogen leakage easy position of the hydrogen engine;
The hydrogen concentration interval determining module is used for determining a preset hydrogen concentration interval to which the hydrogen concentration belongs according to the hydrogen concentration and a plurality of preset hydrogen concentration intervals;
and the control strategy executing module is used for executing a control strategy corresponding to a preset hydrogen concentration interval to which the hydrogen concentration belongs.
In some possible embodiments, the hydrogen concentration obtaining module is further specifically configured to receive the hydrogen concentration detected by a hydrogen concentration sensor, where the hydrogen concentration sensor is disposed at a preset hydrogen leakage prone position of the hydrogen engine.
In some possible embodiments, the plurality of preset hydrogen concentration intervals includes a first preset interval and a second preset interval, and a right endpoint value of the first preset interval is equal to a left endpoint value of the second preset interval.
In some possible embodiments, the control policy enforcement module is further specifically configured to:
Under the condition that the hydrogen concentration belongs to the first preset interval, judging that the running state of the hydrogen engine is normal, and controlling the hydrogen engine to keep the current running state;
Judging whether the hydrogen engine is in a running state or not under the condition that the hydrogen concentration belongs to the second preset interval;
if the vehicle is in the running state, executing a running state control strategy;
and if the vehicle is not in a driving state, controlling the hydrogen engine to stop running.
In some possible implementations, the second preset interval includes a third preset interval, a fourth preset interval, and a fifth preset interval, a right endpoint value of the third preset interval is equal to a left endpoint value of the fourth preset interval, a right endpoint value of the fourth preset interval is equal to a left endpoint value of the fifth preset interval, and an intersection between any two of the third preset interval, the fourth preset interval, and the fifth preset interval is 0. The control strategy execution module is further specifically configured to:
controlling to send out an alarm signal for prompting hydrogen leakage under the condition that the hydrogen concentration belongs to the third preset interval;
When the hydrogen concentration belongs to the fourth preset interval, controlling to send out an alarm signal for prompting hydrogen leakage and controlling to enable the torque rotating speed of the hydrogen engine to be converted into a limp-home mode, and controlling the hydrogen engine to operate in the limp-home mode;
and under the condition that the hydrogen concentration belongs to the fifth preset interval, controlling to send out an alarm signal for prompting serious leakage of hydrogen and controlling to enable the torque rotating speed of the hydrogen engine to be converted into an idle state.
In some possible embodiments, the control policy enforcement module is further specifically configured to: acquiring a plurality of hydrogen leakage rates according to the hydrogen concentration acquired in real time; determining a first acceleration required for converting the torque rotation speed of the hydrogen engine into a limp-home mode according to the plurality of hydrogen leakage rates; control converts the torque rotation speed of the hydrogen engine into a limp-home mode at the first acceleration.
In some possible embodiments, the control policy enforcement module is further specifically configured to: acquiring a plurality of hydrogen leakage rates according to the hydrogen concentration acquired in real time; determining a second acceleration required for converting the torque rotation speed of the hydrogen engine into an idle state according to the hydrogen leakage rates; control switches the torque rotation speed of the hydrogen engine to an idle state at the second acceleration.
According to the control device for the hydrogen engine, provided by the embodiment of the application, the hydrogen concentration of the position where the preset hydrogen leakage of the hydrogen engine is easy to occur is obtained, the preset hydrogen concentration interval to which the hydrogen concentration belongs is determined according to the hydrogen concentration and the preset hydrogen concentration intervals, and the control strategy corresponding to the preset hydrogen concentration interval to which the hydrogen concentration belongs is executed, so that the corresponding control strategy can be executed according to the preset hydrogen concentration interval to which the hydrogen concentration belongs, the hydrogen leakage condition can be flexibly and effectively treated, the safety risk caused by the hydrogen leakage is reduced, and the use safety performance of the hydrogen engine is improved.
Another embodiment of the present application provides an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the computer program to implement a method according to any of the above embodiments.
Referring to fig. 5, the electronic device 10 may include: processor 100, memory 101, bus 102 and communication interface 103, processor 100, communication interface 103 and memory 101 being connected by bus 102; the memory 101 stores a computer program executable on the processor 100, which when executed by the processor 100 performs the method provided by any of the previous embodiments of the application.
The memory 101 may include a high-speed random access memory (RAM: random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the device network element and the at least one other network element is achieved through at least one communication interface 103 (which may be wired or wireless), the internet, a wide area network, a local network, a metropolitan area network, etc. may be used.
Bus 102 may be an ISA bus, a PCI bus, an EISA bus, or the like. The buses may be divided into address buses, data buses, control buses, etc. The memory 101 is configured to store a program, and the processor 100 executes the program after receiving an execution instruction, and the method disclosed in any of the foregoing embodiments of the present application may be applied to the processor 100 or implemented by the processor 100.
The processor 100 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 100 or by instructions in the form of software. The processor 100 may be a general-purpose processor, and may include a central processing unit (Central Processing Unit, abbreviated as CPU), a network processor (Network Processor, abbreviated as NP), and the like; but may also be a Digital Signal Processor (DSP), application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 101, and the processor 100 reads the information in the memory 101 and, in combination with its hardware, performs the steps of the method described above.
The electronic device provided by the embodiment of the application and the method provided by the embodiment of the application have the same beneficial effects as the method adopted, operated or realized by the electronic device and the method provided by the embodiment of the application due to the same inventive concept.
Another embodiment of the present application provides a computer-readable storage medium having stored thereon a computer program that is executed by a processor to implement the method of any of the above embodiments. Referring to fig. 6, a computer readable storage medium is shown as an optical disc 20 having a computer program (i.e., a program product) stored thereon, which, when executed by a processor, performs the method provided by any of the embodiments described above.
It should be noted that examples of the computer readable storage medium may also include, but are not limited to, a phase change memory (PRAM), a Static Random Access Memory (SRAM), a Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a flash memory, or other optical or magnetic storage medium, which will not be described in detail herein.
The computer-readable storage medium provided by the above-described embodiments of the present application has the same advantageous effects as the method adopted, operated or implemented by the application program stored therein, for the same inventive concept as the method provided by the embodiments of the present application.
It should be noted that:
the term "module" is not intended to be limited to a particular physical form. Depending on the particular application, modules may be implemented as hardware, firmware, software, and/or combinations thereof. Furthermore, different modules may share common components or even be implemented by the same components. There may or may not be clear boundaries between different modules.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose devices may also be used with the examples herein. The required structure for the construction of such devices is apparent from the description above. In addition, the present application is not directed to any particular programming language. It will be appreciated that the teachings of the present application described herein may be implemented in a variety of programming languages, and the above description of specific languages is provided for disclosure of enablement and best mode of the present application.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the flowcharts of the figures may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily being sequential, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
The foregoing examples merely illustrate embodiments of the application and are described in more detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. A control method of a hydrogen engine, characterized by comprising:
acquiring the hydrogen concentration of a preset hydrogen leakage prone position of the hydrogen engine;
Determining a preset hydrogen concentration interval to which the hydrogen concentration belongs according to the hydrogen concentration and a plurality of preset hydrogen concentration intervals;
Executing a control strategy corresponding to a preset hydrogen concentration interval to which the hydrogen concentration belongs.
2. The method of claim 1, wherein the obtaining the hydrogen concentration of the preset hydrogen leak prone position of the hydrogen engine comprises:
And receiving the hydrogen concentration detected by a hydrogen concentration sensor, wherein the hydrogen concentration sensor is arranged at a preset hydrogen leakage easy position of the hydrogen engine.
3. The method of claim 1, wherein the plurality of preset hydrogen concentration intervals comprises a first preset interval and a second preset interval, a right endpoint value of the first preset interval being equal to a left endpoint value of the second preset interval.
4. A method according to claim 3, wherein said executing a control strategy corresponding to a preset hydrogen concentration interval to which said hydrogen concentration belongs comprises:
Under the condition that the hydrogen concentration belongs to the first preset interval, judging that the running state of the hydrogen engine is normal, and controlling the hydrogen engine to keep the current running state;
Judging whether the hydrogen engine is in a running state or not under the condition that the hydrogen concentration belongs to the second preset interval;
if the vehicle is in the running state, executing a running state control strategy;
and if the vehicle is not in a driving state, controlling the hydrogen engine to stop running.
5. The method of claim 4, wherein the second preset interval comprises a third preset interval, a fourth preset interval, and a fifth preset interval, a right endpoint value of the third preset interval is equal to a left endpoint value of the fourth preset interval, a right endpoint value of the fourth preset interval is equal to a left endpoint value of the fifth preset interval, and an intersection between any two of the third preset interval, the fourth preset interval, and the fifth preset interval is 0; the executing the running state control strategy includes:
controlling to send out an alarm signal for prompting hydrogen leakage under the condition that the hydrogen concentration belongs to the third preset interval;
When the hydrogen concentration belongs to the fourth preset interval, controlling to send out an alarm signal for prompting hydrogen leakage and controlling to enable the torque rotating speed of the hydrogen engine to be converted into a limp-home mode, and controlling the hydrogen engine to operate in the limp-home mode;
and under the condition that the hydrogen concentration belongs to the fifth preset interval, controlling to send out an alarm signal for prompting serious leakage of hydrogen and controlling to enable the torque rotating speed of the hydrogen engine to be converted into an idle state.
6. The method of claim 5, wherein the controlling transitions the torque speed of the hydrogen engine to a limp home mode, comprising:
acquiring a plurality of hydrogen leakage rates according to the hydrogen concentration acquired in real time;
Determining a first acceleration required for converting the torque rotation speed of the hydrogen engine into a limp-home mode according to the plurality of hydrogen leakage rates;
Control converts the torque rotation speed of the hydrogen engine into a limp-home mode at the first acceleration.
7. The method of claim 6, wherein the controlling transitions the torque rotational speed of the hydrogen engine to an idle state, comprising:
acquiring a plurality of hydrogen leakage rates according to the hydrogen concentration acquired in real time;
determining a second acceleration required for converting the torque rotation speed of the hydrogen engine into an idle state according to the hydrogen leakage rates;
control switches the torque rotation speed of the hydrogen engine to an idle state at the second acceleration.
8. A control device for a hydrogen engine, comprising:
The hydrogen concentration acquisition module is used for acquiring the hydrogen concentration of a preset hydrogen leakage easy position of the hydrogen engine;
The hydrogen concentration interval determining module is used for determining a preset hydrogen concentration interval to which the hydrogen concentration belongs according to the hydrogen concentration and a plurality of preset hydrogen concentration intervals;
and the control strategy executing module is used for executing a control strategy corresponding to a preset hydrogen concentration interval to which the hydrogen concentration belongs.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the computer program to implement the method of controlling a hydrogen engine according to any one of claims 1-7.
10. A computer-readable storage medium having stored thereon a computer program, wherein the computer program is executed by a processor to implement the control method of a hydrogen engine according to any one of claims 1 to 7.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111942231A (en) * | 2020-07-23 | 2020-11-17 | 东风汽车集团有限公司 | Protection method, hydrogen management system and protection system for hydrogen leakage vehicle |
| JP2023082746A (en) * | 2021-12-03 | 2023-06-15 | ダイハツ工業株式会社 | engine |
| JP2024007820A (en) * | 2022-07-06 | 2024-01-19 | トヨタ自動車株式会社 | Control device of vehicle |
| CN117869064A (en) * | 2024-01-08 | 2024-04-12 | 潍柴动力股份有限公司 | Engine control method and device and engine |
| CN117988997A (en) * | 2024-01-04 | 2024-05-07 | 潍柴动力股份有限公司 | Hydrogen engine limp home control system and method, hydrogen engine and vehicle |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111942231A (en) * | 2020-07-23 | 2020-11-17 | 东风汽车集团有限公司 | Protection method, hydrogen management system and protection system for hydrogen leakage vehicle |
| JP2023082746A (en) * | 2021-12-03 | 2023-06-15 | ダイハツ工業株式会社 | engine |
| JP2024007820A (en) * | 2022-07-06 | 2024-01-19 | トヨタ自動車株式会社 | Control device of vehicle |
| CN117988997A (en) * | 2024-01-04 | 2024-05-07 | 潍柴动力股份有限公司 | Hydrogen engine limp home control system and method, hydrogen engine and vehicle |
| CN117869064A (en) * | 2024-01-08 | 2024-04-12 | 潍柴动力股份有限公司 | Engine control method and device and engine |
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