A range extending engine control method, apparatus, device and medium

Abstract

The application discloses a range extending engine control method, device, equipment and medium, comprising: when the ignition advance angle and the fuel injection characteristic of the engine in the last period are both in the corresponding preset range, determining the input ignition advance angle and the input fuel injection characteristic of the current period according to the first vector according to the preset range; controlling the engine to run according to the input ignition advance angle and the input fuel injection characteristic in the current period, and detecting whether the engine meets the target preset state in the current period; when the engine meets the target preset state, updating the current period, and returning to the step of determining the input ignition advance angle and the input fuel injection characteristic of the current period according to the first vector according to the preset range. The application continuously adjusts the ignition advance angle and the fuel injection characteristic on the premise that the engine meets the target preset state, so that the engine continuously approaches the lean limit, the fuel economy is improved, the combustion efficiency is continuously improved, and the cruising range of the automobile is further prolonged.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and in particular to a control method, device, equipment and medium for a range-extended engine. Background Technology

[0002] In response to the energy crisis caused by non-renewable resources, electric vehicles have emerged, and range-extended electric vehicles (REVs) are one type of electric vehicle.

[0003] When the onboard rechargeable energy storage system of a range-extended electric vehicle cannot meet the range requirements, the onboard auxiliary power unit (APU) can be activated. The onboard auxiliary power unit is the range-extending engine, which mainly generates electricity by burning fuel (such as ethanol, gasoline, etc.) to extend the range of the range-extended electric vehicle.

[0004] The combustion efficiency of range-extended engines has a significant impact on the driving range of range-extended electric vehicles. How to further improve the combustion efficiency of range-extended engines is an urgent problem to be solved. Summary of the Invention

[0005] This application provides a range-extended engine control method, device, equipment, and medium, which solves the technical problem of low combustion efficiency in existing range-extended engines and achieves the technical effect of improving the combustion efficiency of range-extended engines.

[0006] In a first aspect, this application provides a control method for a range-extended engine, the method comprising:

[0007] When the engine's ignition advance angle and fuel injection characteristics in the previous time period are both within the corresponding preset range, the input ignition advance angle and input fuel injection characteristics for the current time period are determined according to the first vector based on the preset range.

[0008] Control the engine to operate according to the input ignition advance angle and input fuel injection characteristics in the current period, and detect whether the engine meets the target preset state in the current period. The target preset state includes the increase of thermal efficiency of the engine from the previous period to the current period, and the actual cycle variation of the engine in the current period is less than the cycle variation threshold.

[0009] When the engine meets the target preset state, update the current time period and return to the step of determining the input ignition advance angle and input injection characteristics of the current time period according to the preset range and the first vector.

[0010] Furthermore, before determining the input ignition advance angle and input injection characteristics for the current time period according to the first vector within a preset range, the method also includes:

[0011] Obtain the combustion state parameters of the engine in the current time period;

[0012] Based on the combustion state parameters of the engine in the current period, determine the ignition advance angle and fuel injection characteristics of the engine in the previous period.

[0013] Determine whether the engine's ignition advance angle and fuel injection characteristics were within the corresponding preset range in the previous period.

[0014] Furthermore, when the engine does not meet the target preset state, the method also includes:

[0015] Update the current time period, and determine the input ignition advance angle and input injection characteristics of the current time period according to the preset range and the second vector; the angle between the first vector and the second vector is greater than 90°;

[0016] Return to the steps of controlling the engine to operate according to the input ignition advance angle and input injection characteristics during the current period, and checking whether the engine meets the target preset state during the current period.

[0017] Furthermore, the target preset state also includes the engine's actual knock intensity being less than the knock intensity threshold during the current period.

[0018] Furthermore, when the engine meets the target preset state, the method also includes:

[0019] Obtain the engine's actual operating conditions at the current time.

[0020] Determine the preset hydrogen blending ratio for the engine in the current time period based on the actual operating conditions;

[0021] The engine is controlled to operate under conditions where hydrogen is injected according to a preset hydrogen blending ratio during the current time period;

[0022] The test results are obtained by detecting whether the engine meets the target preset state after hydrogen injection.

[0023] Update the current time period and adjust the hydrogen blending ratio of the engine in the current time period according to the test results. Return to the step of checking whether the engine meets the target preset state after hydrogen injection and obtain the test results.

[0024] Furthermore, the hydrogen blending ratio of the engine will be adjusted based on the test results for the current period, including:

[0025] When the test results show that the engine meets the target preset state after hydrogen injection, increase the hydrogen blending ratio of the engine in the current period.

[0026] When the test results show that the engine does not meet the target preset state after hydrogen injection, the hydrogen blending ratio of the engine in the current period is reduced.

[0027] Furthermore, after adjusting the hydrogen blending ratio and returning to perform the test to check whether the engine meets the target preset state after hydrogen injection, and obtaining the test results, the method also includes:

[0028] When the test results show that the engine meets the target preset state after hydrogen injection, the adjusted hydrogen blending ratio will be used as the preset hydrogen blending ratio for the corresponding operating condition in the current period.

[0029] Secondly, this application provides a range-extended engine control device, the device comprising:

[0030] The determination module is used to determine the input ignition advance angle and input injection characteristics of the current time period according to the first vector based on the preset range when the engine's ignition advance angle and injection characteristics in the previous time period are both within the corresponding preset range.

[0031] The detection module is used to control the engine to operate according to the input ignition advance angle and input injection characteristics in the current period, and to detect whether the engine meets the target preset state in the current period. The target preset state includes the increase in thermal efficiency of the engine from the previous period to the current period, and the actual cyclic variation of the engine in the current period being less than the cyclic variation threshold.

[0032] The loop module is used to update the current time period when the engine meets the target preset state, and return to execute the steps of determining the input ignition advance angle and input injection characteristics of the current time period according to the preset range and the first vector.

[0033] Thirdly, this application provides an electronic device, comprising:

[0034] processor;

[0035] Memory used to store processor-executable instructions;

[0036] The processor is configured to execute a range-extended engine control method as provided in the first aspect.

[0037] Fourthly, this application provides a non-transitory computer-readable storage medium that, when the instructions in the storage medium are executed by the processor of an electronic device, enables the electronic device to perform a range-extended engine control method as provided in the first aspect.

[0038] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0039] This embodiment adjusts the engine's ignition advance angle and fuel injection characteristics while ensuring they fall within the corresponding preset range. When the adjusted ignition advance angle and fuel injection characteristics satisfy the target preset state, it means that the current adjustment direction can improve the engine's combustion efficiency. Furthermore, by continuously adjusting the ignition advance angle and fuel injection characteristics while ensuring the engine meets the target preset state, the engine continuously approaches the lean-burn limit, improving fuel economy and thus continuously improving combustion efficiency, further extending the vehicle's driving range. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A flowchart illustrating a range-extended engine control method provided in this application;

[0042] Figure 2 This application provides a schematic diagram illustrating the relationship between the previous time period and the current time period.

[0043] Figure 3 A schematic diagram of the structure of a range-extended engine control device provided in this application;

[0044] Figure 4 This is a schematic diagram of the structure of an electronic device provided in this application. Detailed Implementation

[0045] This application provides a control method for a range-extended engine, which solves the technical problem of low combustion efficiency in existing range-extended engines.

[0046] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows:

[0047] A range-extended engine control method includes: when the engine's ignition advance angle and injection characteristics in the previous time period are both within the corresponding preset range, determining the input ignition advance angle and input injection characteristics for the current time period according to the preset range and a first vector; controlling the engine to operate according to the input ignition advance angle and input injection characteristics in the current time period, and detecting whether the engine meets a target preset state in the current time period, the target preset state including an increase in the engine's thermal efficiency from the previous time period to the current time period, and the engine's actual cyclic variation in the current time period being less than a cyclic variation threshold; when the engine meets the target preset state, updating the current time period, and returning to the step of determining the input ignition advance angle and input injection characteristics for the current time period according to the preset range and the first vector.

[0048] This embodiment adjusts the engine's ignition advance angle and fuel injection characteristics while ensuring they fall within the corresponding preset range. When the adjusted ignition advance angle and fuel injection characteristics satisfy the target preset state, it means that the current adjustment direction can improve the engine's combustion efficiency. Furthermore, by continuously adjusting the ignition advance angle and fuel injection characteristics while ensuring the engine meets the target preset state, the engine continuously approaches the lean-burn limit, improving fuel economy and thus continuously improving combustion efficiency, further extending the vehicle's driving range.

[0049] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0050] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0051] To address the energy crisis caused by non-renewable resources, electric vehicles have emerged, and range-extended electric vehicles (REVs) are one type of electric vehicle. REVs offer advantages such as simple structure, strong low-speed power output, and stable high-speed performance. More importantly, when the onboard rechargeable energy storage system cannot meet the required driving range, an onboard auxiliary power unit (also known as a range-extending engine, hereinafter referred to as the engine) can be activated to supply power to the power system, thereby extending the driving range.

[0052] Engines generate electricity by burning fuels (such as ethanol and gasoline) to extend the driving range of range-extended electric vehicles. Therefore, the combustion efficiency of the engine has a significant impact on the driving range of range-extended electric vehicles, and how to further improve the combustion efficiency of the engine is an urgent problem to be solved.

[0053] To address the aforementioned problems, this embodiment provides the following: Figure 1 The method shown is a range-extended engine control method, which includes steps S11-S13.

[0054] Step S11: When the engine's ignition advance angle and fuel injection characteristics in the previous time period are both within the corresponding preset range, determine the input ignition advance angle and input fuel injection characteristics for the current time period according to the first vector based on the preset range.

[0055] Step S12: Control the engine to operate according to the input ignition advance angle and input injection characteristics in the current time period, and detect whether the engine meets the target preset state in the current time period. The target preset state includes the increase of thermal efficiency of the engine from the previous time period to the current time period, and the actual cycle variation of the engine in the current time period is less than the cycle variation threshold.

[0056] Step S13: When the engine meets the target preset state, update the current time period and return to the step of determining the input ignition advance angle and input injection characteristics of the current time period according to the preset range and the first vector.

[0057] In this embodiment, the engine refers to the engine in a range-extended electric vehicle (hereinafter referred to as the vehicle) that generates electricity by burning fuel. For example, the engine could be the engine of a dual-fuel REV vehicle (ethanol and gasoline).

[0058] The range-extender engine control method provided in this embodiment is applied during the engine start-up process. For a vehicle equipped with a range-extender engine, the need to start the engine can be determined based on the vehicle's battery usage mode. The battery usage mode can include a battery sustaining mode and a battery depletion mode. The battery sustaining mode refers to a mode where the remaining battery power of the onboard rechargeable energy storage system remains constant, while the engine provides driving force for the vehicle's operation. The battery depletion mode refers to a mode where the onboard rechargeable energy storage system provides driving force for the vehicle, causing the remaining battery power to continuously decrease. When the vehicle is in battery depletion mode and the onboard rechargeable energy storage system has sufficient battery power, the engine does not need to run; when the vehicle is in battery depletion mode and the onboard rechargeable energy storage system has insufficient battery power, the engine needs to run to supplement the vehicle's driving force. Therefore, when the vehicle is in battery sustaining mode, the engine needs to be started; or, when the vehicle is in battery depletion mode and the onboard rechargeable energy storage system has insufficient battery power, the engine needs to be started.

[0059] Furthermore, the range-extended engine control method provided in this embodiment is specifically applied to the process when the engine is in a lean-burn state. After starting the engine, it can be controlled to enter a lean-burn mode (hereinafter referred to as lean-burn mode) according to the actual situation. In lean-burn mode, the combustion temperature of the engine is lower, the combustion chamber has sufficient oxygen and lower heat loss, and it can achieve higher thermal efficiency than ordinary combustion. However, in lean-burn mode, automobiles are prone to problems such as large cycle fluctuations and abnormal knocking. In order to reduce the probability of these problems, it is necessary to improve the thermal efficiency of lean-burn mode. The range-extended engine control method provided in this embodiment can be used to improve the thermal efficiency of lean-burn mode.

[0060] Before performing step S11, this embodiment also provides steps S01-S03 to determine whether the engine's ignition advance angle and fuel injection characteristics in the previous time period are both within the corresponding preset range.

[0061] Step S01: Obtain the combustion state parameters of the engine in the current time period;

[0062] Step S02: Based on the combustion state parameters of the engine in the current time period, determine the ignition advance angle and fuel injection characteristics of the engine in the previous time period.

[0063] Step S03: Determine whether the engine's ignition advance angle and fuel injection characteristics in the previous time period are both within the corresponding preset range.

[0064] The previous time period corresponds to the current time period. The current time period is the time period in which the current moment occurs, and the previous time period is the adjacent time period before the current time period, such as... Figure 2 As shown, this illustrates the relationship between the previous time period and the current time period. Figure 2 It also includes the next time period. As time goes by, the current time will be replaced by the previous time period, and the next time period will be replaced by the new current time period, and so on.

[0065] Combustion state parameters may include CA50 and IMEP, where CA50 refers to the crankshaft angle corresponding to 50% of the combustion heat release, and IMEP refers to the mean indicated pressure.

[0066] Fuel injection characteristics refer to the relationship between fuel injection quantity and injection timing. Ignition advance angle refers to the angle through which the crankshaft rotates from the moment of ignition until the piston reaches top dead center of the compression stroke.

[0067] Combustion state parameters reflect the engine's combustion status in the current time period, which in turn is the engine's response to the ignition advance angle and injection characteristics input in the previous time period. Different ignition advance angles and injection characteristics have corresponding relationships with the combustion state parameters, and these relationships can be obtained through calibration.

[0068] This embodiment obtains the engine's combustion state parameters for the current time period, queries the correspondence between different ignition advance angles and injection characteristics and the combustion state parameters, and thus determines the ignition advance angle and injection characteristics corresponding to the combustion state parameters for the current time period, i.e., the ignition advance angle and injection characteristics for the previous time period. The ignition advance angle for the previous time period can be the average value of that time period or the value at a specific moment, and the injection characteristics for the previous time period can also be the average value of that time period or the value at a specific moment; the specific choice can be made according to the actual situation.

[0069] During bench testing or real-vehicle testing in the manufacturing or R&D process of automobiles, the appropriate range of ignition advance angle and fuel injection characteristics under different operating conditions can be obtained (i.e., the engine operates normally within this range). In this embodiment, the appropriate range of ignition advance angle and fuel injection characteristics are collectively referred to as the preset range.

[0070] Based on the ignition advance angle and injection characteristics obtained in the previous time period, the preset ranges corresponding to the ignition advance angle and injection characteristics can be queried to determine whether the engine's ignition advance angle and injection characteristics in the previous time period were within the preset ranges. Based on the judgment results of whether the engine's ignition advance angle and injection characteristics in the previous time period were both within the corresponding preset ranges, it can be determined whether the vehicle's operating state in the previous time period was normal.

[0071] When the engine's ignition advance angle and fuel injection characteristics are both within the corresponding preset range in the previous period, it indicates that the engine is in normal operation. At this time, it means that steps S11-S13 can be executed to improve the engine's combustion efficiency.

[0072] Regarding step S11, when the engine's ignition advance angle and fuel injection characteristics in the previous time period are both within the corresponding preset range, the input ignition advance angle and input fuel injection characteristics for the current time period are determined according to the first vector based on the preset range.

[0073] Under the premise of normal engine operation, the ignition advance angle and injection characteristics of the previous time period can be adjusted according to the first vector within the preset range of the ignition advance angle and the preset range of the injection characteristics to obtain the input ignition advance angle and input injection characteristics corresponding to the current time period. Among them, the input ignition advance angle and input injection characteristics specifically refer to the ignition advance angle and injection characteristics corresponding to the current time period. "Input" is used to distinguish the ignition advance angle and injection characteristics of the current time period from those of the previous time period.

[0074] The first vector includes the adjustment direction and adjustment magnitude, which can be determined based on the actual situation. Ignition advance angle and injection characteristics can correspond to different first vectors or the same first vector. For ignition advance angle, the adjustment direction includes increasing or decreasing the ignition advance angle, and the adjustment magnitude includes the angle rotated by the crankshaft. For injection characteristics, the adjustment direction can be increasing or decreasing the injection quantity per unit time, and the adjustment magnitude can be the injection quantity per unit time.

[0075] For example, if the ignition advance angle of the previous period differs significantly from the endpoint value in the preset range, the magnitude of the first vector used to adjust the ignition advance angle can be set to be larger, and the adjustment direction can be to increase the ignition advance angle.

[0076] Regarding step S12, the engine is controlled to operate according to the input ignition advance angle and input injection characteristics during the current time period, and it is detected whether the engine meets the target preset state during the current time period. The target preset state includes the increase in thermal efficiency of the engine from the previous time period to the current time period, and the actual cyclic variation of the engine during the current time period being less than the cyclic variation threshold.

[0077] The engine is controlled to operate according to the input ignition advance angle and input injection characteristics determined in step S11 during the current time period, and the actual state during the current time period is obtained to determine whether the actual state meets the target preset state.

[0078] The target preset state can include state one and state two, or it can include state one and state three, or it can include state one, state two, and state three. Preferably, the target preset state can include state one, state two, and state three, enabling the engine to significantly improve combustion efficiency. When the target preset state includes state one and state two, or state one and state three, the improvement in combustion efficiency that the engine can achieve is relatively limited.

[0079] [Status 1] The engine's thermal efficiency has increased from the previous time period to the current time period.

[0080] [State 2] The actual cyclic variation of the engine in the current period is less than the cyclic variation threshold.

[0081] [State 3] The target preset state also includes the engine’s actual knock intensity being less than the knock intensity threshold during the current period.

[0082] The increased thermal efficiency in State 1 indicates improved fuel economy of the engine; the actual cycle variation in State 2 being less than the cycle variation threshold indicates that the engine is under normal operating conditions; the actual knock intensity in State 3 being less than the knock intensity threshold indicates improved fuel economy of the engine, and also indicates that the engine is under normal operating conditions.

[0083] Combustion cycle variation, also known as combustion cycle pressure variation, is a key characteristic of the combustion process in spark-ignition engines. When an engine operates stably under a certain condition, the combustion process in one cycle and the next constantly changes, specifically manifested in differences in pressure curves, flame propagation, and engine power output. As long as the cycle variation does not exceed a critical value (the maximum cycle variation that an engine can exhibit under normal operating conditions), the closer the engine's cycle variation is to the cycle variation threshold, the higher the lean-burn combustion efficiency, i.e., the higher the lean-burn limit. When the cycle variation exceeds the critical value, the lean-burn mode can be disengaged to minimize the duration of abnormal cycle variation and thus reduce the degree of damage to the engine.

[0084] The closer the engine's knock intensity is to the knock intensity threshold, the higher the engine's lean-burn combustion efficiency, that is, the higher the lean-burn limit.

[0085] Detect whether the engine meets the target preset state in the current time period. If the engine meets the target preset state, step S13 can be continued. If the engine does not meet the target preset state, step S14 can be continued.

[0086] Regarding step S13, when the engine meets the target preset state, update the current time period and return to the step of determining the input ignition advance angle and input injection characteristics of the current time period according to the preset range and the first vector.

[0087] Update the current time period, that is, as time goes by, take the next time period as the current time, and return to execute step S11.

[0088] When the engine meets the target preset state, it demonstrates that adjusting the engine's ignition advance angle and injection characteristics according to the first vector in step S11 is beneficial to improving the engine's combustion efficiency. Therefore, step S13 can be continued, which involves further adjusting the engine's ignition advance angle and injection characteristics according to the first vector, allowing the engine's combustion efficiency to continue to improve. In other words, under the premise that the engine meets the target preset state, by continuously cyclically executing steps S11-S13, the engine's lean-burn limit can be continuously approached, thereby improving the engine's combustion efficiency.

[0089] Step 14: When the engine does not meet the target preset state, update the current time period, determine the input ignition advance angle and input injection characteristics of the current time period according to the preset range and the second vector, and return to execute step S12. The angle between the first vector and the second vector is greater than 90°.

[0090] In step S12 above, when it is determined that the engine does not meet the target preset state, it indicates that adjusting the engine's ignition advance angle and fuel injection characteristics according to the first vector in step S11 is not helpful in improving the engine's combustion efficiency, that is, the first vector may be wrong. At this time, step S14 can continue to be executed.

[0091] Step S14 involves determining a second vector that differs from the first vector, adjusting the engine's ignition advance angle and injection characteristics according to the second vector, and determining whether the engine meets the target preset state during operation with the ignition advance angle and injection characteristics adjusted according to the second vector. In other words, it returns to step S12 to determine whether adjusting the engine's ignition advance angle and injection characteristics according to the second vector can improve the engine's combustion efficiency.

[0092] In summary, this embodiment adjusts the engine's ignition advance angle and fuel injection characteristics within the corresponding preset range. When the adjusted ignition advance angle and fuel injection characteristics meet the target preset state, it means that the current adjustment direction can improve the engine's combustion efficiency. Furthermore, by continuously adjusting the ignition advance angle and fuel injection characteristics while the engine meets the target preset state, the engine continuously approaches the lean-burn limit, improving fuel economy and thus continuously improving combustion efficiency, further extending the vehicle's driving range.

[0093] Based on the above scheme, when the engine meets the target preset state, that is, while executing step S13, steps S21-S25 provided in this embodiment can also be executed, so that the engine can further approach the lean-burn limit, improve fuel economy, and thus continuously improve combustion efficiency.

[0094] Step S21: Obtain the actual operating conditions of the engine in the current time period;

[0095] Step S22: Determine the preset hydrogen blending ratio for the engine in the current time period based on the actual operating conditions;

[0096] Step S23: Control the engine to operate under the condition that hydrogen is injected according to the preset hydrogen blending ratio during the current period;

[0097] Step S24: Detect whether the engine meets the target preset state after hydrogen injection, and obtain the detection result;

[0098] Step S25: Update the current time period and adjust the hydrogen blending ratio of the engine in the current time period according to the detection results. Return to the step of detecting whether the engine meets the target preset state after hydrogen injection and obtain the detection results, that is, return to the step S24.

[0099] The actual operating conditions of the engine at the current time can be determined based on the engine's actual operating status. For example, the actual operating conditions can be starting conditions, idling conditions, acceleration conditions, constant speed conditions, or load conditions, etc.

[0100] During engine manufacturing or development, the ratio of hydrogen content to fuel that can be injected into the engine under different operating conditions can be determined. In this embodiment, this is referred to as the preset hydrogen blending ratio. That is to say, during engine manufacturing or development, the engine's operating conditions and the preset hydrogen blending ratio can be calibrated. During engine manufacturing and normal operation, the corresponding preset hydrogen blending ratio can be determined based on the actual operating conditions.

[0101] Hydrogen is injected into the engine according to a preset hydrogen blending ratio. The engine is then tested to see if it meets the target preset state after the hydrogen is injected. The test results are obtained, and corresponding adjustment measures are taken based on the different test results.

[0102] When the test results show that the engine meets the target preset state after hydrogen injection, it means that the engine's operating state remains normal after hydrogen injection. This indicates that due to the high octane rating, wide combustible range, and low ignition energy of hydrogen, the engine's lean-burn limit is further enhanced, thereby achieving the goals of further optimizing combustion, improving thermal efficiency, and enhancing fuel economy. At this point, the engine is in normal condition, and hydrogen injection is beneficial for improving engine combustion efficiency. Therefore, the hydrogen blending ratio can be further increased in the current period to control the engine and continue to approach the lean-burn limit, continuously improving combustion efficiency.

[0103] When the test result shows that the engine does not meet the target preset state after hydrogen injection, it means that the currently injected hydrogen is causing the engine to tend to run away from control. In order to mitigate and stop the development of this runaway state, the hydrogen blending ratio of the engine in the current period can be reduced to prevent the engine from developing into a runaway state. After reducing the hydrogen blending ratio, step 24 is executed to monitor whether the engine's operating state tends to be in a normal state. This process is repeated to reduce the engine's running time in abnormal states and to seek ways to continuously approach the lean-burn limit while maintaining normal operation, thus providing a basis for improving fuel efficiency and further extending the vehicle's driving range.

[0104] After adjusting the hydrogen blending ratio and returning to the step of checking whether the engine meets the target preset state after hydrogen injection, and obtaining the test result, if the test result shows that the engine meets the target preset state after hydrogen injection, the adjusted hydrogen blending ratio is used as the preset hydrogen blending ratio for the corresponding operating condition at the current time. In other words, the preset hydrogen blending ratio is continuously updated. As the engine continues to run after leaving the factory, its preset hydrogen blending ratio will be continuously updated during the execution of steps S24 and S25, making the preset hydrogen blending ratio increasingly optimized. This helps to improve the engine's lean-burn limit, optimize combustion, improve thermal efficiency, and enhance fuel economy.

[0105] In summary, this embodiment, while adjusting the engine's ignition advance angle and injection characteristics to meet the target preset state, further enhances the engine's lean-burn limit by injecting hydrogen. Based on hydrogen's high octane rating, wide combustible range, and low ignition energy, combustion is further optimized, thermal efficiency is improved, and fuel economy is enhanced. Simultaneously, the hydrogen blending ratio is continuously adjusted according to the engine's operating conditions, resulting in continuous optimization of the hydrogen blending ratio. This achieves cyclically optimized combustion efficiency, constantly approaching the engine's lean-burn limit, and further extending the vehicle's driving range.

[0106] Based on the same inventive concept, this embodiment provides as follows: Figure 3 The illustrated range-extended engine control device includes:

[0107] The determination module 31 is used to determine the input ignition advance angle and input injection characteristics of the current time period according to the first vector based on the preset range when the ignition advance angle and injection characteristics of the engine in the previous time period are both within the corresponding preset range.

[0108] The detection module 32 is used to control the engine to operate according to the input ignition advance angle and input injection characteristics in the current period, and to detect whether the engine meets the target preset state in the current period. The target preset state includes the increase in thermal efficiency of the engine from the previous period to the current period, and the actual cyclic variation of the engine in the current period being less than the cyclic variation threshold.

[0109] The loop module 33 is used to update the current time period when the engine meets the target preset state, and return to execute the steps of determining the input ignition advance angle and input injection characteristics of the current time period according to the preset range and the first vector.

[0110] Furthermore, the device also includes:

[0111] The acquisition module is used to acquire the combustion state parameters of the engine in the current period before determining the input ignition advance angle and input injection characteristics of the current period according to the first vector within the preset range.

[0112] The determination module 31 is used to determine the ignition advance angle and fuel injection characteristics of the engine in the previous period based on the combustion state parameters of the engine in the current period.

[0113] The judgment module is used to determine whether the engine's ignition advance angle and fuel injection characteristics were within the corresponding preset range in the previous period.

[0114] Furthermore, the device also includes:

[0115] The determination module 31 is used to update the current time period when the engine does not meet the target preset state, and to determine the input ignition advance angle and input injection characteristics of the current time period according to the preset range and the second vector; the angle between the first vector and the second vector is greater than 90°;

[0116] The loop module 33 is used to return to the steps of controlling the engine to operate according to the input ignition advance angle and input injection characteristics in the current period, and to detect whether the engine meets the target preset state in the current period.

[0117] Furthermore, the target preset state also includes the engine's actual knock intensity being less than the knock intensity threshold during the current period.

[0118] Furthermore, the device also includes:

[0119] The acquisition module is used to acquire the actual operating conditions of the engine in the current time period when the engine meets the target preset state.

[0120] The determination module 31 is used to determine the preset hydrogen blending ratio of the engine in the current time period based on the actual operating conditions.

[0121] The control module is used to control the engine to operate when hydrogen is injected according to a preset hydrogen blending ratio during the current period;

[0122] The detection module 32 is used to detect whether the engine meets the target preset state after hydrogen injection and obtain the detection result;

[0123] The loop module 33 is used to update the current time period and adjust the hydrogen blending ratio of the engine in the current time period according to the detection results, and return to the step of detecting whether the engine meets the target preset state after hydrogen injection and obtaining the detection results.

[0124] Furthermore, loop module 33 is used for:

[0125] When the test results show that the engine meets the target preset state after hydrogen injection, increase the hydrogen blending ratio of the engine in the current period.

[0126] When the test results show that the engine does not meet the target preset state after hydrogen injection, the hydrogen blending ratio of the engine in the current period is reduced.

[0127] Furthermore, loop module 33 is used for:

[0128] After adjusting the hydrogen blending ratio and returning to perform the test to check whether the engine meets the target preset state after hydrogen injection, and obtaining the test result, when the test result shows that the engine meets the target preset state after hydrogen injection, the adjusted hydrogen blending ratio will be used as the preset hydrogen blending ratio for the corresponding operating condition in the current time period.

[0129] Based on the same inventive concept, this embodiment provides as follows: Figure 4 An electronic device shown includes:

[0130] Processor 41;

[0131] Memory 42 is used to store executable instructions of processor 41;

[0132] The processor 41 is configured to execute a range-extended engine control method as described above.

[0133] Based on the same inventive concept, this embodiment provides a non-transitory computer-readable storage medium that, when the instructions in the storage medium are executed by the processor 41 of an electronic device, enables the electronic device to perform a range-extended engine control method as described above.

[0134] Since the electronic device described in this embodiment is an electronic device used to implement the information processing method in the embodiments of this application, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment based on the information processing method described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any electronic device used by those skilled in the art to implement the information processing method in the embodiments of this application falls within the scope of protection of this application.

[0135] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0136] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0137] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0138] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0139] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0140] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A control method for a range-extended engine, characterized in that, The method includes: When the engine's ignition advance angle and fuel injection characteristics in the previous time period are both within the corresponding preset range, the input ignition advance angle and input fuel injection characteristics in the current time period are determined according to the preset range and the first vector. The engine is controlled to operate according to the input ignition advance angle and input injection characteristics during the current time period, and it is detected whether the engine meets the target preset state during the current time period. The target preset state includes the increase of the thermal efficiency of the engine from the previous time period to the current time period, and the actual cyclic variation of the engine during the current time period being less than the cyclic variation threshold. When the engine meets the target preset state, update the current time period and return to the step of determining the input ignition advance angle and input injection characteristics of the current time period according to the preset range and the first vector.

2. The method as described in claim 1, characterized in that, Before determining the input ignition advance angle and input injection characteristics for the current time period according to the preset range and the first vector, the method further includes: Obtain the combustion state parameters of the engine during the current time period; Based on the combustion state parameters of the engine in the current time period, determine the ignition advance angle and fuel injection characteristics of the engine in the previous time period. Determine whether the engine's ignition advance angle and fuel injection characteristics in the previous time period are both within the corresponding preset range.

3. The method as described in claim 1, characterized in that, When the engine does not meet the target preset state, the method further includes: The current time period is updated, and the input ignition advance angle and input injection characteristics of the current time period are determined according to the preset range and the second vector; the angle between the first vector and the second vector is greater than 90°; The process returns to the steps of controlling the engine to operate according to the input ignition advance angle and input injection characteristics during the current time period, and detecting whether the engine meets the target preset state during the current time period.

4. The method as described in claim 1, characterized in that, The target preset state also includes the engine's actual knock intensity being less than the knock intensity threshold during the current time period.

5. The method as described in claim 1 or 4, characterized in that, When the engine meets the target preset state, the method further includes: Obtain the actual operating conditions of the engine during the current time period; Based on the actual operating conditions, determine the preset hydrogen blending ratio of the engine corresponding to the current time period; The engine is controlled to operate under the condition that hydrogen is injected according to the preset hydrogen blending ratio during the current time period; The test results are obtained by detecting whether the engine meets the target preset state after hydrogen injection. Update the current time period, adjust the hydrogen blending ratio of the engine in the current time period according to the detection results, and return to the step of detecting whether the engine meets the target preset state after hydrogen injection and obtaining the detection results.

6. The method as described in claim 5, characterized in that, The step of adjusting the hydrogen blending ratio of the engine in the current time period based on the detection results includes: When the detection result shows that the engine meets the target preset state after hydrogen injection, the hydrogen blending ratio of the engine in the current time period is increased. When the detection result shows that the engine does not meet the target preset state after hydrogen injection, the hydrogen blending ratio of the engine in the current time period is reduced.

7. The method as described in claim 5, characterized in that, After adjusting the hydrogen blending ratio and returning to perform the step of detecting whether the engine meets the target preset state after hydrogen injection, and obtaining the detection result, the method further includes: When the detection result shows that the engine meets the target preset state after hydrogen injection, the adjusted hydrogen blending ratio is used as the preset hydrogen blending ratio for the current operating condition.

8. A range-extended engine control device, characterized in that, The device includes: The determination module is used to determine the input ignition advance angle and input injection characteristics of the current time period according to the first vector based on the preset range when the engine's ignition advance angle and injection characteristics in the previous time period are both within the corresponding preset range. The detection module is used to control the engine to operate according to the input ignition advance angle and input injection characteristics in the current time period, and to detect whether the engine meets the target preset state in the current time period. The target preset state includes the increase of the thermal efficiency of the engine from the previous time period to the current time period, and the actual cyclic variation of the engine in the current time period being less than the cyclic variation threshold. The loop module is used to update the current time period when the engine meets the target preset state, and return to execute the step of determining the input ignition advance angle and input injection characteristics of the current time period according to the preset range and the first vector.

9. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute a range-extended engine control method as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform a range-extended engine control method as described in any one of claims 1 to 7.

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