A method and device for optimizing transient performance control of a hydrogen engine

Abstract

The present application discloses a method and device for optimizing the transient performance control of a hydrogen engine. The method obtains the actual air volume and speed of the hydrogen engine in real time, determines the air volume deviation according to the set air volume and the actual air volume, wherein the set air volume is the air volume required by the hydrogen engine under different speed loads, determines the air volume deviation threshold by the speed, determines whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold, and obtains a determination result. If the determination result indicates that the hydrogen engine meets the transient acceleration activation condition, the hydrogen engine is triggered to perform transient acceleration activation, so that the hydrogen engine performs transient acceleration. During the process of the hydrogen engine performing transient acceleration, the operating load of the hydrogen engine is determined in real time according to the speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to preset calibration quantities.

Description

Technical Field

[0001] The present application relates to the field of engine control technology, and more specifically, to a method and device for optimizing transient performance control of a hydrogen engine. Background Art

[0002] Hydrogen engines use zero-carbon fuel hydrogen as an energy carrier to reduce carbon emissions, but due to the extremely fast combustion speed of hydrogen, detonation combustion is more likely to occur in the combustion chamber, causing damage to the hydrogen engine body and reducing the reliability of engine components. In order to suppress the combustion speed of the hydrogen-air mixture, more air is usually required to increase the air-fuel ratio of the mixture.

[0003] During the operation of a hydrogen engine, the air-fuel ratio is controlled above 2.0 to reduce the risk of knocking combustion and reduce the emission of nitrogen oxides (NOx). Therefore, the amount of air required for the stable operation of a hydrogen engine is much higher than that of an equivalent combustion spark-ignition engine. Limited by the transient response capability of the supercharger, if the total amount of mixed gas entering the engine combustion chamber under transient conditions, especially load steps, is not increased through optimized control, its transient response will be difficult to meet user needs.

[0004] Therefore, how to increase the total amount of mixed gas entering the engine combustion chamber under transient conditions, especially load steps, of a hydrogen engine through optimized control methods so that the transient responsiveness meets user needs is an urgent problem to be solved in this application. Summary of the invention

[0005] In view of this, the present application discloses a method and device for optimizing the transient performance control of a hydrogen engine, which aims to determine the operating load of the hydrogen engine in real time according to the rotational speed and the actual air volume during the transient acceleration of the hydrogen engine, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to preset calibration quantities, thereby increasing the total amount of mixed gas entering the engine combustion chamber under transient conditions, especially load steps, so that the transient responsiveness meets user needs.

[0006] In order to achieve the above purpose, the disclosed technical solution is as follows:

[0007] The first aspect of the present application discloses a method for optimizing the transient performance of a hydrogen engine, the method comprising:

[0008] Obtain the actual air volume and speed of the hydrogen engine in real time;

[0009] Determine the air volume deviation according to the set air volume and the actual air volume; wherein the set air volume is the air volume required by the hydrogen engine at different speeds and loads;

[0010] determining an air volume deviation threshold value by means of the rotation speed;

[0011] Determining whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold, and obtaining a determination result;

[0012] If the determination result indicates that the hydrogen engine meets the transient acceleration activation condition, the hydrogen engine is triggered to perform transient acceleration activation, so that the hydrogen engine performs transient acceleration;

[0013] During the transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is determined in real time according to the rotation speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to preset calibration quantities.

[0014] Preferably, determining the air volume deviation according to the set air volume and the actual air volume includes:

[0015] The set air volume and the actual air volume are calculated to obtain an air volume deviation.

[0016] Preferably, determining the air volume deviation threshold value according to the rotation speed includes:

[0017] The air volume deviation threshold is obtained by the calibrated air volume deviation queried by the rotational speed; wherein the air volume deviation threshold is a threshold of the deviation between the set air volume and the actual air volume caused by the calibration error under different rotational speed conditions.

[0018] Preferably, determining whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold to obtain a determination result includes:

[0019] comparing the air volume deviation with the air volume deviation threshold;

[0020] If the air volume deviation threshold is less than or equal to the air volume deviation, a determination result that the hydrogen engine meets the transient acceleration activation condition is obtained;

[0021] If the air volume deviation threshold is greater than the air volume deviation, a determination result is obtained that the hydrogen engine does not meet the transient acceleration activation condition.

[0022] Preferably, during the transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is judged in real time according to the rotation speed and the actual air volume, so that the control parameters of the operation of the hydrogen engine at different operating loads are executed according to preset calibration quantities, including:

[0023] During the transient acceleration of the hydrogen engine, the speed and the actual air volume are looked up in a table to obtain an air-fuel ratio in a current transient acceleration mode, an ignition advance angle in the current transient acceleration mode, and an exhaust gas recirculation rate value in the current transient acceleration mode;

[0024] The operating load of the hydrogen engine is determined in real time by the air-fuel ratio in the current transient acceleration mode, the ignition advance angle in the current transient acceleration mode, the exhaust gas recirculation rate value in the current transient acceleration mode, the speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to preset calibration quantities.

[0025] Preferably, it also includes:

[0026] The air-fuel ratio is determined during the process of causing the hydrogen engine to undergo transient acceleration; wherein the air-fuel ratio is determined by the knock boundary of the corresponding electronic control parameter under steady state; the knock boundary is used to monitor the knock state of the hydrogen engine so that the hydrogen engine is in an optimal acceleration state during the transient acceleration process and no knock occurs.

[0027] The second aspect of the present application discloses a transient performance optimization control device for a hydrogen engine, the device comprising:

[0028] A real-time acquisition unit, used to acquire the actual air volume and speed of the hydrogen engine in real time;

[0029] A first determining unit is used to determine an air volume deviation according to a set air volume and the actual air volume; wherein the set air volume is the air volume required by the hydrogen engine at different speeds and loads;

[0030] a second determining unit, configured to determine an air volume deviation threshold value according to the rotation speed;

[0031] a determination unit, configured to determine whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold, and obtain a determination result;

[0032] A trigger unit, used for triggering the hydrogen engine to perform transient acceleration activation if the determination result indicates that the hydrogen engine meets the transient acceleration activation condition, so as to enable the hydrogen engine to perform transient acceleration;

[0033] The real-time judgment unit is used to judge the operating load of the hydrogen engine in real time according to the rotation speed and the actual air volume during the transient acceleration of the hydrogen engine, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to preset calibration quantities.

[0034] Preferably, the first determination unit is specifically used to calculate the difference between the set air volume and the actual air volume to obtain the air volume deviation.

[0035] Preferably, the second determination unit is specifically used to obtain an air volume deviation threshold value through the calibrated air volume deviation queried by the speed; wherein the air volume deviation threshold value is a threshold value of the deviation between the set air volume and the actual air volume caused by the calibration error under different speed conditions.

[0036] Preferably, determining whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold to obtain a determination result includes:

[0037] A comparison module, used for comparing the air volume deviation with the air volume deviation threshold;

[0038] A first acquisition module, configured to obtain a determination result that the hydrogen engine meets the transient acceleration activation condition if the air volume deviation threshold is less than or equal to the air volume deviation;

[0039] The second acquisition module is used to obtain a determination result that the hydrogen engine does not meet the transient acceleration activation condition if the air volume deviation threshold is greater than the air volume deviation.

[0040] Through the above technical scheme, it can be known that the present application discloses a method and device for optimizing the transient performance control of a hydrogen engine, which obtains the actual air volume and speed of the hydrogen engine in real time, determines the air volume deviation according to the set air volume and the actual air volume, wherein the set air volume is the air volume required by the hydrogen engine under different speed loads, determines the air volume deviation threshold by the speed, determines whether the hydrogen engine meets the transient acceleration activation conditions according to the air volume deviation and the air volume deviation threshold, and obtains a determination result. If the determination result indicates that the hydrogen engine meets the transient acceleration activation conditions, the hydrogen engine is triggered to perform transient acceleration activation, so that the hydrogen engine performs transient acceleration. During the process of the hydrogen engine performing transient acceleration, the operating load of the hydrogen engine is determined in real time according to the speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to the preset calibration quantity. Through the above scheme, the air volume deviation is determined according to the set air volume and the actual air volume, so as to accurately determine whether the hydrogen engine is still in the transient acceleration state and prevent the engine from exiting the transient control state prematurely. The air volume deviation threshold determined by the speed is used as an auxiliary judgment condition for whether the hydrogen engine enters transient control. This auxiliary judgment condition can avoid the hydrogen engine control error entering the transient acceleration control state due to calibration deviation. During the transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is judged in real time according to the speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to the preset calibration quantity, thereby increasing the total amount of mixed gas entering the engine combustion chamber under transient conditions, especially load steps, so that the transient responsiveness meets user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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 embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0042] Figure 1 It is a structural schematic diagram of a transient performance optimization control system of a hydrogen engine disclosed in an embodiment of the present application;

[0043] Figure 2 A schematic flow chart of a method for optimizing transient performance of a hydrogen engine disclosed in an embodiment of the present application;

[0044] Figure 3 A schematic structural diagram of a transient performance optimization control device for a hydrogen engine disclosed in an embodiment of the present application;

[0045] Figure 4 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0048] As can be seen from the background technology, during the operation of a hydrogen engine, the air-fuel ratio is controlled to be above 2.0 to reduce the risk of knock combustion and reduce NOx emissions. Therefore, the amount of air required for the stable operation of a hydrogen engine is much higher than that of an equivalent combustion spark-ignition engine. Limited by the transient response capability of the supercharger, if the total amount of mixed gas entering the engine combustion chamber under transient conditions, especially load steps, is not increased by optimizing control, its transient responsiveness is difficult to meet user needs. Therefore, how to increase the total amount of mixed gas entering the engine combustion chamber under transient conditions, especially load steps, by optimizing control methods, so that the transient responsiveness meets user needs, is a problem that this application urgently needs to solve.

[0049] In order to solve the above problems, the present application discloses a method and device for optimizing the transient performance control of a hydrogen engine. According to the set air volume and the actual air volume, the air volume deviation is determined to accurately judge whether the hydrogen engine is still in a transient acceleration state, and prevent the engine from exiting the transient control state prematurely. The air volume deviation threshold determined by the speed is used as an auxiliary judgment condition for whether the hydrogen engine enters transient control. The auxiliary judgment condition can avoid the hydrogen engine control error entering the transient acceleration control state due to calibration deviation. In the process of transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is judged in real time according to the speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to the preset calibration quantity, thereby increasing the total amount of mixed gas entering the engine combustion chamber during the transient working condition, especially the load step, so that the transient responsiveness meets the user's needs. The specific implementation method is specifically described by the following embodiments.

[0050] refer to Figure 1 , which is a schematic structural diagram of a transient performance optimization control system for a hydrogen engine disclosed in an embodiment of the present application.

[0051] The execution process of the transient performance optimization control system of the hydrogen engine is as follows:

[0052] First, the air volume deviation is obtained by subtracting the set air volume from the actual air volume actually entering the hydrogen engine obtained in real time. The air volume deviation is used as a judgment condition for whether the hydrogen engine is in transient control: since the transient response of the hydrogen engine is poor, the air volume deviation between the set air volume and the actual air volume is selected to accurately judge whether the engine is still in a transient acceleration state, so as to prevent the engine from exiting the transient control state prematurely.

[0053] It should be noted that the set air volume refers to the amount of air required by the engine at different speeds and loads; since the hydrogen engine determines the quality of hydrogen injection based on the air volume and the set air-fuel ratio, the set air volume at the same speed determines the load of the hydrogen engine. The set air volume is related to the required load of the engine. The higher the required load of the hydrogen engine, the higher the set air volume. The maximum set air volume is about 1600kg / h.

[0054] A hydrogen engine is an engine in which hydrogen enters the engine combustion chamber through intake port injection or direct cylinder injection to burn and produce work.

[0055] Secondly, the air volume deviation threshold is determined by the speed of the hydrogen engine obtained in real time. The air volume deviation threshold is used as an auxiliary judgment condition for whether the hydrogen engine enters transient control. This auxiliary judgment condition can avoid the engine control error entering the transient acceleration state due to calibration deviation. The air volume deviation threshold is used to avoid the engine control error entering the transient acceleration control state due to calibration deviation.

[0056] It should be noted that when the air volume deviation between the set air volume and the actual air volume is always greater than the air volume deviation threshold, the engine is always in the transient acceleration state. If the air volume deviation between the set air volume and the actual air volume is less than or equal to the air volume deviation threshold, the hydrogen engine exits the transient acceleration state.

[0057] The transient acceleration state refers to the state in which, during the acceleration process, when the driver steps deeply on the accelerator, the throttle opening becomes larger, and the electronic control unit (ECU) of the engine control system determines that the driver needs to accelerate based on the current vehicle speed, speed and gear position, so it will appropriately increase the fuel concentration to increase power to meet the acceleration needs.

[0058] The hydrogen engine uses the air volume deviation between the required air volume and the actual air volume as a variable to judge the transient acceleration state. When the air volume deviation exceeds the air volume deviation threshold value obtained based on the speed, the hydrogen engine enters the transient acceleration state, and when the deviation is less than the deviation threshold value obtained based on the speed, the engine exits the transient acceleration state.

[0059] Thirdly, during transient operation, the air-fuel ratio (λ) of the engine is determined by the knock boundary of the corresponding electronic control parameters (such as ignition advance angle, EGR rate, hydrogen injection phase, etc.) under steady state. The knock boundary is monitored by auxiliary equipment such as combustion analyzer and cylinder pressure sensor to ensure that the engine is in the best acceleration state during transient acceleration and no knock occurs.

[0060] It should be noted that knock refers to an abnormal combustion condition in which the pressure in the combustion chamber suddenly rises and oscillates when the flame of the spark plug of an ignition engine has not reached the edge of the combustion chamber and the mixture at that location spontaneously ignites.

[0061] Finally, the hydrogen engine transient operation Figure 1 The Y axis of the coordinate map is the actual air volume related variable, that is, during the transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is judged in real time according to the speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to the preset calibration quantity. For example, at low and medium loads, heavy enrichment can be used, while at high loads, excessive enrichment can be prevented to cause engine knock and excessive NOx emissions.

[0062] The actual air volume and speed are used as coordinate axes to determine the transient load of the hydrogen engine in real time. The hydrogen engine can characterize the current load of the hydrogen engine through the speed and actual air volume. The higher the actual air volume of the hydrogen engine, the higher the load of the hydrogen engine.

[0063] It should be noted that the air-fuel ratio, exhaust gas recirculation (EGR) rate, and ignition angle of the hydrogen engine under transient operating conditions are determined by the actual air volume and speed.

[0064] The air-fuel ratio refers to the mass ratio between air and fuel in the mixture.

[0065] The ignition angle refers to the crankshaft angle corresponding to the ignition of a spark-ignition engine before the top dead center.

[0066] The hydrogen engine can characterize the operating load through the speed and actual air volume. The engine can obtain the current set air-fuel ratio (Lambda), ignition angle, and EGR rate value by looking up the table based on its own speed and actual air flow.

[0067] The calibration parameters for engines of different displacements are different and need to be taken based on the engine knock boundary.

[0068] This scheme proposes a method that can accurately determine whether a hydrogen engine is in a transient acceleration state. When the engine enters the transient acceleration state, the engine's operating parameters (such as Lambda setting value, ignition angle, EGR rate, etc.) will switch to the calibrated values ​​of the acceleration mode. For example, the original Lambda setting value is switched to the transient Lambda setting value, the original ignition angle is switched to the transient ignition angle, and the original EGR rate is switched to the transient EGR rate, thereby shortening the transient response time of the hydrogen engine.

[0069] This scheme uses the difference between the set air volume and the actual air volume as the condition for judging whether the engine enters transient control, so that the engine will not exit the transient acceleration control state prematurely during the entire process of the hydrogen engine transient response. The table (CUR) of the calibrated speed setting value queried by speed gives the deviation between the set air volume and the actual air volume caused by the calibration error under different speed conditions, preventing the engine from mistakenly entering the transient acceleration control state. The control of λ during the transient operation of the engine is determined by the λ value of the knock boundary corresponding to the corresponding electronic control parameter during steady-state operation, so that the engine reaches the best acceleration state without knocking. The operating load of the engine is determined by Lambda, EGR rate and ignition angle MAP with the actual air volume as the Y axis, and the corresponding control parameters are operated according to the calibration value. Different control parameters are operated during different loads and acceleration processes to prevent problems such as too low Lambda and too large ignition angle under high load, which lead to engine knock and excessive NOx emissions.

[0070] This solution improves the transient response of the hydrogen engine and suppresses the risk of knock combustion without increasing the engine hardware cost. The control logic is slightly changed, the ECU calculation amount is not increased, and the calibration is simple. The actuator can respond quickly after the transient response requirement is raised.

[0071] In the embodiment of the present application, the air volume deviation is determined according to the set air volume and the actual air volume, so as to accurately judge whether the hydrogen engine is still in the transient acceleration state and prevent the engine from exiting the transient control state prematurely. The air volume deviation threshold is determined by the rotation speed, and the air volume deviation and the air volume deviation threshold are used as auxiliary judgment conditions for whether the hydrogen engine enters the transient control. The auxiliary judgment condition can avoid the hydrogen engine control error entering the transient acceleration control state due to the calibration deviation. In the process of transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is judged in real time according to the rotation speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to the preset calibration quantity, so as to increase the total amount of mixed gas entering the engine combustion chamber in the transient working condition, especially the load step, so that the transient responsiveness meets the user's needs.

[0072] refer to Figure 2 FIG. 1 is a flow chart of a method for optimizing transient performance of a hydrogen engine disclosed in an embodiment of the present application. The method for optimizing transient performance of a hydrogen engine mainly includes the following steps:

[0073] S201: Acquire the actual air volume and speed of the hydrogen engine in real time.

[0074] In S201 , the actual air volume of the current hydrogen engine and the current rotation speed of the hydrogen engine are obtained in real time.

[0075] S202: Determine an air volume deviation according to a set air volume and an actual air volume; wherein the set air volume is the air volume required by the hydrogen engine at different speeds and loads.

[0076] In S202, the set air volume and the actual air volume are calculated to obtain an air volume deviation.

[0077] S203: Determine an air volume deviation threshold value according to the rotation speed.

[0078] In S203, the air volume deviation threshold of CUR is obtained through the calibrated CUR queried by the speed; wherein the air volume deviation threshold is the threshold of the deviation between the set air volume and the actual air volume caused by the calibration error under different speed conditions; the air volume deviation threshold is used to avoid the engine control error entering the transient acceleration control state due to the calibration deviation.

[0079] S204: Determine whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold, and obtain a determination result.

[0080] In S204, the air volume deviation is compared with the air volume deviation threshold. If the air volume deviation threshold is less than or equal to the air volume deviation, a determination result is obtained that the hydrogen engine meets the transient acceleration activation condition; if the air volume deviation threshold is greater than the air volume deviation, a determination result is obtained that the hydrogen engine does not meet the transient acceleration activation condition.

[0081] S205: If the determination result indicates that the hydrogen engine meets the transient acceleration activation condition, the hydrogen engine is triggered to perform transient acceleration activation, so that the hydrogen engine performs transient acceleration.

[0082] The lambda value is determined during the process of transient acceleration of the hydrogen engine; wherein the air-fuel ratio is determined by the knock boundary of the corresponding electronic control parameters (ignition advance angle, EGR rate, hydrogen injection phase, etc.) in the steady state; the knock boundary is used to monitor the knock state of the hydrogen engine so that the hydrogen engine is in the best acceleration state during the transient acceleration process and no knock occurs.

[0083] If the determination result indicates that the hydrogen engine does not meet the transient acceleration activation conditions, the transient acceleration is exited.

[0084] S206: During the transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is determined in real time according to the rotation speed and the actual air volume, so that the control parameters of the operation of the hydrogen engine at different operating loads are executed according to preset calibration quantities.

[0085] During the transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is judged in real time according to the speed and the actual air volume, and the specific process of executing the control parameters of the hydrogen engine at different operating loads according to the preset calibration quantity is as follows:

[0086] First, during the transient acceleration of the hydrogen engine, the speed and the actual air volume are looked up in a table to obtain the Lambda value, the ignition advance angle and the exhaust gas recirculation rate value under the current transient acceleration mode;

[0087] Then, the operating load of the hydrogen engine is judged in real time through Lambda in the current transient acceleration mode, the ignition advance angle in the current transient acceleration mode, the exhaust gas recirculation rate value in the current transient acceleration mode, the speed (the current engine speed) and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to the preset calibration quantity.

[0088] For example, when the engine enters the transient acceleration state, the engine's operating parameters (such as Lambda setting value, ignition angle, EGR rate, etc.) will switch to the preset calibration value, that is, the calibration value of the acceleration mode, such as switching from the original Lambda setting value to the transient Lambda setting value, from the original ignition angle to the transient ignition angle, and from the original EGR rate to the transient EGR rate, thereby shortening the transient response time of the hydrogen engine.

[0089] The preset calibration quantities include transient Lambda setting value, transient ignition angle, transient EGR rate, etc. The preset calibration quantities are calibration values ​​of acceleration modes that have been pre-set.

[0090] The control of the air-fuel ratio during the transient operation of the engine is determined by the air-fuel ratio of the knock boundary corresponding to the corresponding electronic control parameters during steady-state operation, so that the engine reaches the best acceleration state without knocking. The engine's operating load is determined by the Lambda setting value, EGR rate and ignition angle MAP with the actual air volume as the Y-axis, and the corresponding control parameters are operated according to the calibration value. Different control parameters are operated under different loads and acceleration processes to prevent problems such as too low Lambda setting value and too large ignition angle under high load, which lead to engine knock and excessive NOx emissions.

[0091] The execution process and execution principle of S201-S206 are the same as those of the above embodiment. Figure 1 The execution process and execution principle of the transient performance optimization control system of the hydrogen engine in are consistent with those in the specification and can be used as reference, and will not be repeated here.

[0092] In the embodiment of the present application, the air volume deviation is determined according to the set air volume and the actual air volume, so as to accurately judge whether the hydrogen engine is still in the transient acceleration state and prevent the engine from exiting the transient control state prematurely. The air volume deviation threshold is determined by the rotation speed, and the air volume deviation and the air volume deviation threshold are used as auxiliary judgment conditions for whether the hydrogen engine enters the transient control. The auxiliary judgment condition can avoid the hydrogen engine control error entering the transient acceleration control state due to the calibration deviation. In the process of transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is judged in real time according to the rotation speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to the preset calibration quantity, so as to increase the total amount of mixed gas entering the engine combustion chamber in the transient working condition, especially the load step, so that the transient responsiveness meets the user's needs.

[0093] Based on the above embodiments Figure 2 A method for optimizing the transient performance of a hydrogen engine is disclosed. The present application also discloses a device for optimizing the transient performance of a hydrogen engine. Figure 3 shown.

[0094] A real-time acquisition unit 301 is used to acquire the actual air volume and speed of the hydrogen engine in real time;

[0095] The first determination unit 302 is used to determine the air volume deviation according to the set air volume and the actual air volume; wherein the set air volume is the air volume required by the hydrogen engine at different speeds and loads;

[0096] A second determining unit 303, configured to determine an air volume deviation threshold value according to a rotation speed;

[0097] A determination unit 304 is used to determine whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold, and obtain a determination result;

[0098] The trigger unit 305 is used to trigger the hydrogen engine to perform transient acceleration activation if the determination result indicates that the hydrogen engine meets the transient acceleration activation condition, so that the hydrogen engine performs transient acceleration;

[0099] The real-time judgment unit 306 is used to judge the operating load of the hydrogen engine in real time according to the rotation speed and the actual air volume during the transient acceleration of the hydrogen engine, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to preset calibration quantities.

[0100] Furthermore, the first determining unit 302 is specifically configured to calculate the difference between the set air volume and the actual air volume to obtain an air volume deviation.

[0101] Furthermore, the second determination unit 303 is specifically used to obtain an air volume deviation threshold value through the calibrated air volume deviation queried by the speed; wherein the air volume deviation threshold value is a threshold value of the deviation between the set air volume and the actual air volume caused by the calibration error under different speed conditions.

[0102] Furthermore, the determination unit 304 includes:

[0103] A comparison module, used for comparing the air volume deviation with an air volume deviation threshold;

[0104] A first acquisition module is used to obtain a determination result that the hydrogen engine meets the transient acceleration activation condition if the air volume deviation threshold is less than or equal to the air volume deviation;

[0105] The second acquisition module is used to obtain a determination result that the hydrogen engine does not meet the transient acceleration activation condition if the air volume deviation threshold is greater than the air volume deviation.

[0106] Furthermore, the real-time determination unit 306 includes:

[0107] The table lookup module is used to look up the speed and the actual air volume in the table during the transient acceleration of the hydrogen engine to obtain the air-fuel ratio in the current transient acceleration mode, the ignition advance angle in the current transient acceleration mode, and the exhaust gas recirculation rate value in the current transient acceleration mode;

[0108] The real-time judgment module is used to judge the operating load of the hydrogen engine in real time through the air-fuel ratio in the current transient acceleration mode, the ignition advance angle in the current transient acceleration mode, the exhaust gas recirculation rate value in the current transient acceleration mode, the speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to the preset calibration quantity.

[0109] Further, the transient performance optimization control device of the hydrogen engine also includes a third determination unit;

[0110] The third determination unit is used to determine the air-fuel ratio during the process of transient acceleration of the hydrogen engine; wherein the air-fuel ratio is determined by the knock boundary of the corresponding electronic control parameter under steady state; the knock boundary is used to monitor the knock state of the hydrogen engine so that the hydrogen engine is in the best acceleration state during the transient acceleration process and no knock occurs.

[0111] In the embodiment of the present application, the air volume deviation is determined according to the set air volume and the actual air volume, so as to accurately judge whether the hydrogen engine is still in the transient acceleration state and prevent the engine from exiting the transient control state prematurely. The air volume deviation threshold is determined by the rotation speed, and the air volume deviation and the air volume deviation threshold are used as auxiliary judgment conditions for whether the hydrogen engine enters the transient control. The auxiliary judgment condition can avoid the hydrogen engine control error entering the transient acceleration control state due to the calibration deviation. In the process of transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is judged in real time according to the rotation speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to the preset calibration quantity, so as to increase the total amount of mixed gas entering the engine combustion chamber in the transient working condition, especially the load step, so that the transient responsiveness meets the user's needs.

[0112] An embodiment of the present application further provides a storage medium, which includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the transient performance optimization control method of the hydrogen engine as described above.

[0113] The present application also provides an electronic device, whose structural diagram is as follows: Figure 4 As shown, it specifically includes a memory 401, and one or more instructions 402, wherein the one or more instructions 402 are stored in the memory 401, and are configured to be executed by one or more processors 403 to execute the one or more instructions 402 to execute the transient performance optimization control method of the above-mentioned hydrogen engine.

[0114] For the aforementioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the order of the actions described, because according to the present application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0115] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0116] The steps in the methods of the embodiments of the present application can be adjusted in order, combined, and deleted according to actual needs.

[0117] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0118] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0119] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for optimizing the transient performance of a hydrogen engine, characterized in that: The method comprises: Obtain the actual air volume and speed of the hydrogen engine in real time; Determine the air volume deviation according to the set air volume and the actual air volume; wherein the set air volume is the air volume required by the hydrogen engine at different speeds and loads; determining an air volume deviation threshold value by means of the rotation speed; Determining whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold, and obtaining a determination result; If the determination result indicates that the hydrogen engine meets the transient acceleration activation condition, the hydrogen engine is triggered to perform transient acceleration activation, so that the hydrogen engine performs transient acceleration; During the transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is determined in real time according to the rotation speed and the actual air volume, so that the control parameters of the operation of the hydrogen engine at different operating loads are executed according to preset calibration quantities; The step of determining the air volume deviation threshold value according to the rotation speed includes: The air volume deviation threshold is obtained by the calibrated air volume deviation queried by the rotational speed; wherein the air volume deviation threshold is a threshold of the deviation between the set air volume and the actual air volume caused by the calibration error under different rotational speed conditions.

2. The method according to claim 1, characterized in that The determining of the air volume deviation according to the set air volume and the actual air volume includes: The set air volume and the actual air volume are calculated to obtain an air volume deviation.

3. The method according to claim 1, characterized in that The determining whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold, and obtaining a determination result, includes: comparing the air volume deviation with the air volume deviation threshold; If the air volume deviation threshold is less than or equal to the air volume deviation, a determination result that the hydrogen engine meets the transient acceleration activation condition is obtained; If the air volume deviation threshold is greater than the air volume deviation, a determination result is obtained that the hydrogen engine does not meet the transient acceleration activation condition.

4. The method according to claim 1, characterized in that: During the transient acceleration of the hydrogen engine, the operating load of the hydrogen engine is judged in real time according to the rotation speed and the actual air volume, so that the control parameters of the operation of the hydrogen engine at different operating loads are executed according to the preset calibration amount, including: During the transient acceleration of the hydrogen engine, the speed and the actual air volume are looked up in a table to obtain an air-fuel ratio in a current transient acceleration mode, an ignition advance angle in the current transient acceleration mode, and an exhaust gas recirculation rate value in the current transient acceleration mode; The operating load of the hydrogen engine is determined in real time by the air-fuel ratio in the current transient acceleration mode, the ignition advance angle in the current transient acceleration mode, the exhaust gas recirculation rate value in the current transient acceleration mode, the speed and the actual air volume, so that the control parameters of the hydrogen engine operation at different operating loads are executed according to preset calibration quantities.

5. The method according to claim 1, characterized in that Also includes: The air-fuel ratio is determined during the process of causing the hydrogen engine to undergo transient acceleration; wherein the air-fuel ratio is determined by the knock boundary of the corresponding electronic control parameter under steady state; the knock boundary is used to monitor the knock state of the hydrogen engine so that the hydrogen engine is in an optimal acceleration state during the transient acceleration process and no knock occurs.

6. A transient performance optimization control device for a hydrogen engine, characterized in that: The device comprises: A real-time acquisition unit, used to acquire the actual air volume and speed of the hydrogen engine in real time; A first determining unit is used to determine an air volume deviation according to a set air volume and the actual air volume; wherein the set air volume is the air volume required by the hydrogen engine at different speeds and loads; a second determining unit, configured to determine an air volume deviation threshold value according to the rotation speed; a determination unit, configured to determine whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold, and obtain a determination result; A trigger unit, used for triggering the hydrogen engine to perform transient acceleration activation if the determination result indicates that the hydrogen engine meets the transient acceleration activation condition, so as to enable the hydrogen engine to perform transient acceleration; A real-time judgment unit, used to judge the operating load of the hydrogen engine in real time according to the rotation speed and the actual air volume during the transient acceleration of the hydrogen engine, so that the control parameters of the operation of the hydrogen engine at different operating loads are executed according to preset calibration quantities; The second determination unit is specifically used to obtain an air volume deviation threshold value through the calibrated air volume deviation queried by the speed; wherein the air volume deviation threshold value is a threshold value of the deviation between the set air volume and the actual air volume caused by the calibration error under different speed conditions.

7. The device according to claim 6, characterized in that The first determination unit is specifically configured to calculate the difference between the set air volume and the actual air volume to obtain an air volume deviation.

8. The device according to claim 6, characterized in that The determining whether the hydrogen engine meets the transient acceleration activation condition according to the air volume deviation and the air volume deviation threshold, and obtaining a determination result, includes: A comparison module, used for comparing the air volume deviation with the air volume deviation threshold; A first acquisition module, configured to obtain a determination result that the hydrogen engine meets the transient acceleration activation condition if the air volume deviation threshold is less than or equal to the air volume deviation; The second acquisition module is used to obtain a determination result that the hydrogen engine does not meet the transient acceleration activation condition if the air volume deviation threshold is greater than the air volume deviation.

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