A control method, device and equipment for inhibiting surge and storage medium

Abstract

The application provides a control method, device and equipment for inhibiting surge and a storage medium. Based on current throttle opening information and a gearbox gear, it is determined that a supercharger is in a surge-prone state. Based on current engine torque, a current torque change rate or a pre-labeled torque filtering label, it is determined that torque filtering is to be performed. According to the current gearbox gear and engine demand torque, a to-be-determined torque change rate is determined from a pre-set correspondence between the gearbox gear, the engine demand torque and the to-be-determined torque change rate. Based on the to-be-determined torque change rate, a pre-labeled torque change rate constant and the current engine torque, a torque output value of the engine after torque filtering is determined, so that the engine outputs torque based on the torque output value after torque filtering. Since the application can determine the torque output value after torque filtering based on the torque change rate after determining that the supercharger is in the surge-prone state, surge can be inhibited.

Description

Technical Field

[0001] This application relates to the field of engine technology, and in particular to a control method, device, equipment and storage medium for suppressing surge. Background Technology

[0002] A turbocharger pre-compresses the air or combustible mixture entering the engine cylinders to increase the density of the air or combustible mixture entering the cylinders, thereby increasing engine power and improving engine emissions performance.

[0003] When an engine is equipped with an exhaust gas turbocharger, the instantaneous intake airflow decreases when the engine switches from high speed and high load to low speed and low load. Simultaneously, the turbocharger compressor pressure ratio is high, causing the turbocharger to enter an unstable surge region. This results in unstable airflow oscillations in the intake direction, accompanied by transient surge noise or a leak-like sound. Therefore, it is necessary to provide a method to suppress surge. Summary of the Invention

[0004] This application provides a control method, apparatus, device, and storage medium for suppressing surge in a turbocharger.

[0005] In a first aspect, embodiments of this application provide a control method for suppressing surge, including:

[0006] Based on the current accelerator pedal opening information and transmission gear position, it is determined that the turbocharger is in a surge-prone state.

[0007] Based on the engine's current torque, current torque change rate, or pre-calibrated torque filtering calibration value, determine the torque filtering to be performed;

[0008] Based on the current gearbox gear and engine torque demand, the unknown torque change rate is determined from the pre-set correspondence between gearbox gear, engine torque demand and unknown torque change rate.

[0009] Based on the undetermined torque change rate, the pre-calibrated torque change rate constant, and the engine's current torque, the torque output value of the engine after torque filtering is determined, so that the engine outputs torque based on the torque output value after torque filtering.

[0010] In some embodiments, determining that the turbocharger is in a surge-prone state based on the current accelerator pedal opening information and the transmission gear includes:

[0011] If the current opening of the accelerator pedal is less than the preset opening, and the rate of change of the current opening of the accelerator pedal is less than the preset rate of change, then the turbocharger is determined to be in a surge-prone state.

[0012] If the current gearbox gear changes and the rate of change of the current accelerator pedal opening is less than the preset rate of change, then the turbocharger is determined to be in a surge-prone state.

[0013] In some embodiments, determining to perform torque filtering based on the engine's current torque, current torque change rate, or a pre-calibrated torque filtering calibrator includes:

[0014] If the current torque of the engine is less than the engine's required torque, then torque filtering is determined.

[0015] If the current torque change rate of the engine is less than the critical surge torque change rate, then torque filtering is determined to be performed.

[0016] If the pre-calibrated torque filtering calibration value is a preset value, then torque filtering is determined to be performed.

[0017] In some embodiments, determining the torque output value of the engine after torque filtering based on the undetermined torque change rate, a pre-calibrated torque change rate constant, and the engine's current torque includes:

[0018] The smaller value between the undetermined torque change rate and the pre-calibrated torque change rate constant is taken as the target torque change rate;

[0019] Based on the target torque change rate and the engine's required torque, determine the unknown torque output value;

[0020] Based on the unknown torque output value and the current torque of the engine, the torque output value of the engine after torque filtering is determined.

[0021] In some embodiments, determining the torque output value after torque filtering of the engine based on the undetermined torque output value and the current torque of the engine includes:

[0022] The larger of the undetermined torque output value and the current torque of the engine is used as the torque output value of the engine after torque filtering.

[0023] Secondly, embodiments of this application also provide a control device for suppressing surge, comprising:

[0024] The first determining module is used to determine whether the turbocharger is in a surge-prone state based on the current accelerator pedal opening information and the gearbox gear position.

[0025] The second determining module is used to determine whether to perform torque filtering based on the engine's current torque, current torque change rate, or a pre-calibrated torque filtering calibration value.

[0026] The third determining module is used to determine the unknown torque change rate based on the current gearbox gear and engine torque demand, from the pre-set correspondence between the gearbox gear, engine torque demand and unknown torque change rate.

[0027] The fourth determining module is used to determine the torque output value of the engine after torque filtering based on the unknown torque change rate, the pre-calibrated torque change rate constant and the current torque of the engine, so that the engine outputs torque based on the torque filtered torque output value.

[0028] In some embodiments, the first determining module is specifically used for:

[0029] If the current opening of the accelerator pedal is less than the preset opening, and the rate of change of the current opening of the accelerator pedal is less than the preset rate of change, then the turbocharger is determined to be in a surge-prone state.

[0030] If the current gearbox gear changes and the rate of change of the current accelerator pedal opening is less than the preset rate of change, then the turbocharger is determined to be in a surge-prone state.

[0031] In some embodiments, the second determining module is specifically used for:

[0032] If the current torque of the engine is less than the engine's required torque, then torque filtering is determined.

[0033] If the current torque change rate of the engine is less than the critical surge torque change rate, then torque filtering is determined to be performed.

[0034] If the pre-calibrated torque filtering calibration value is a preset value, then torque filtering is determined to be performed.

[0035] In some embodiments, the fourth determining module is specifically used for:

[0036] The smaller value between the undetermined torque change rate and the pre-calibrated torque change rate constant is taken as the target torque change rate;

[0037] Based on the target torque change rate and the engine's required torque, determine the unknown torque output value;

[0038] Based on the unknown torque output value and the current torque of the engine, the torque output value of the engine after torque filtering is determined.

[0039] In some embodiments, the fourth determining module is specifically used for:

[0040] The larger of the undetermined torque output value and the current torque of the engine is used as the torque output value of the engine after torque filtering.

[0041] Thirdly, embodiments of this application also provide an electronic device, including a memory and a processor;

[0042] The memory is used to store instructions;

[0043] The processor is configured to execute instructions stored in the memory, and when the processor executes the instructions stored in the memory, causes the electronic device to perform the method as described in any of the first aspects.

[0044] Fourthly, embodiments of this application also provide a computer storage medium storing instructions that, when executed on a computer, cause the computer to perform the method described in any of the first aspects.

[0045] This application provides a control method, apparatus, device, and storage medium for suppressing surge. The method includes: determining that the turbocharger is in a surge-prone state based on the current accelerator pedal opening information and the transmission gear; determining to perform torque filtering based on the engine's current torque, current torque change rate, or a pre-calibrated torque filtering calibration value; determining a desired torque change rate from a pre-set correspondence between the transmission gear, engine demand torque, and a desired torque change rate, based on the current transmission gear and the engine's required torque; and determining the engine's torque output value after torque filtering based on the desired torque change rate, a pre-calibrated torque change rate constant, and the engine's current torque, so that the engine outputs torque based on the filtered torque output value. Because this application can determine the filtered torque output value based on the torque change rate after determining that the turbocharger is in a surge-prone state, surge can be suppressed. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A flowchart illustrating a control method for suppressing surge provided in an embodiment of this application;

[0048] Figure 2 This is a schematic diagram of a torque filtering control strategy provided in an embodiment of this application;

[0049] Figure 3 This is a schematic diagram of the structure of a control device for suppressing surge provided in an embodiment of this application;

[0050] Figure 4This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art are within the scope of protection of this application.

[0052] Furthermore, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0053] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0054] To suppress surge in turbochargers, embodiments of this application provide a control method for suppressing surge, such as... Figure 1 As shown, this application provides a method for suppressing surge, the method comprising:

[0055] S101. Based on the current accelerator pedal opening information and transmission gear position, it is determined that the turbocharger is in a surge-prone state. The surge-prone state mentioned here means that surge is likely to occur, but it is not certain to occur. It can be determined based on the current accelerator pedal opening information and transmission gear position.

[0056] Specifically, if the current opening of the accelerator pedal is less than the preset opening, and the rate of change of the current accelerator pedal opening is less than the preset rate of change, then the turbocharger is determined to be in a surge-prone state. The opening when the accelerator pedal is fully released is 0%, and the opening when the accelerator pedal is fully depressed is 100%. The rate of change refers to the rate of change of the accelerator pedal opening per unit time. In this embodiment, for example, if the preset opening is set to 5%, the preset rate of change is 50% / s, and the detected current accelerator pedal opening is 3%, and the accelerator pedal opening in the previous second was 60%, meaning the current rate of change of the accelerator pedal opening is 57% / s, then the turbocharger is determined to be in a surge-prone state.

[0057] It is worth noting that simply relying on the current opening of the accelerator pedal or the rate of change of the current opening of the accelerator pedal is not enough to determine whether the turbocharger is in a surge-prone state. Only when both conditions are met simultaneously, that is, the force with which the accelerator pedal is released is large enough and the accelerator pedal is released quickly enough, can the turbocharger be accurately determined to be in a surge-prone state. This method of judgment can improve the accuracy of the judgment.

[0058] In this embodiment, the turbocharger can also be determined based on the gearbox gear position. If the current gearbox gear position changes and the rate of change of the current accelerator pedal opening is less than a preset rate of change, then the turbocharger is determined to be in a surge-prone state. A change in gearbox gear position refers to a gear shift. Specifically, it can be determined whether the previous gearbox gear position minus the current gear position is not equal to 0. If it is not equal to 0, it means that a gear shift has occurred, and a gear change may cause surge. However, to improve accuracy, the condition that the rate of change of the current accelerator pedal opening is less than a preset rate of change needs to be added, which makes the judgment more accurate. Of course, in addition to these two conditions, the judgment of the current accelerator pedal opening can be further added, i.e., the condition that the current accelerator pedal opening is less than a preset opening can be added, which can further improve the accuracy of the judgment.

[0059] S102. Based on the engine's current torque, current torque change rate, or pre-calibrated torque filtering calibration value, determine whether to perform torque filtering; specifically, torque filtering can be determined based on the following three conditions:

[0060] Condition 1: The determination is based on the engine's current torque and required torque. If the engine's current torque is less than the engine's required torque, then torque filtering is determined. For example, if the current required torque of the engine is 100 NM, but the current torque of the engine is only 80 NM, then the current torque of the engine is less than the required torque, and torque filtering is determined.

[0061] Condition 2: Determined based on the current torque change rate and the critical surge torque change rate of the engine. If the current torque change rate of the engine is less than the critical surge torque change rate, torque filtering is determined. The critical surge torque change rate refers to the critical state at which surge occurs by controlling the engine speed change rate and the turbocharger compressor pressure ratio. The torque change rate at different pressure ratios is recorded, and this torque change rate is the critical surge torque change rate. For example, if the current torque change rate of the engine is 10 NM / s and the critical surge torque change rate is 15 NM / s, then the current torque change rate of the engine is less than the critical torque change rate, and torque filtering is determined.

[0062] Condition 3: Torque filtering is determined based on a pre-calibrated torque filter calibration value. If the pre-calibrated torque filter calibration value is a preset value, then torque filtering is determined to be performed. In this embodiment, the torque filter calibration value refers to an enable state switch calibration variable indicating whether torque filtering control is required before engine torque output. A calibration value of 1 indicates a torque filtering control requirement, while a calibration value of 0 indicates no torque filtering control requirement. When the torque filter calibration value is detected to be 1, it indicates a torque filtering control requirement, and torque filtering is then determined to be performed.

[0063] S103. Based on the current gearbox gear and engine torque demand, determine the unknown torque change rate from the pre-set correspondence between gearbox gear, engine torque demand and unknown torque change rate.

[0064] Since the torque change rate required for torque filtering is related to the real-time gearbox gear and engine torque demand, this application embodiment will conduct experiments in advance to calibrate the correspondence between the gearbox gear, engine torque demand, and a torque change rate to be determined. Then, based on the current gearbox gear and engine torque demand, the torque change rate to be determined is determined from this calibrated correspondence.

[0065] S104. Based on the undetermined torque change rate, the pre-calibrated torque change rate constant, and the engine's current torque, determine the engine's torque output value after torque filtering, so that the engine outputs torque based on the filtered torque output value. In this way, the engine's torque output based on the filtered torque output value can suppress surge.

[0066] In practice, the smaller of the unknown torque change rate and the pre-calibrated torque change rate constant is taken as the target torque change rate.

[0067] Based on the target torque change rate and the engine's required torque, the undetermined torque output value is determined; that is, y = k * DT + b, where y is the undetermined torque output value, k is the target torque change rate, DT is the torque change time, and b is the engine's required torque.

[0068] Based on the unknown torque output value and the engine's current torque, the torque output value after torque filtering is determined. Specifically, the larger of the unknown torque output value and the engine's current torque is taken as the torque output value after torque filtering.

[0069] like Figure 2 The diagram shown is a schematic of a torque filtering control strategy provided in an embodiment of this application. The accelerator pedal torque design value is the engine's required torque, the torque decrease slope is the undetermined torque change rate, Kc is the pre-calibrated torque change rate constant, DT is the torque change time, and the enable torque step limit function switch quantity is the torque filtering calibration quantity. This process has been described above and will not be repeated here.

[0070] The surge suppression control method provided in this application does not require additional engine hardware or software and can be implemented on all engines equipped with electronic control units and conventional engine status sensors. Furthermore, this application performs torque filtering specifically for the throttle reduction and torque reduction conditions, and adds a weakening control for turbocharger surge without affecting the original torque filtering judgment.

[0071] Based on the same concept, embodiments of this application also provide a control device for suppressing surge. The implementation of this device can refer to the implementation of the above-described method; repeated details will not be elaborated further. Figure 3 As shown, the surge suppression control device includes:

[0072] The first determining module 301 is used to determine that the turbocharger is in a surge-prone state based on the current accelerator pedal opening information and the gearbox gear position.

[0073] The second determining module 302 is used to determine whether to perform torque filtering based on the engine's current torque, current torque change rate, or a pre-calibrated torque filtering calibration value.

[0074] The third determining module 303 is used to determine the unknown torque change rate based on the current gearbox gear and engine torque demand from a pre-set correspondence between the gearbox gear, engine torque demand and unknown torque change rate.

[0075] The fourth determining module 304 is used to determine the torque output value of the engine after torque filtering based on the unknown torque change rate, the pre-calibrated torque change rate constant and the current torque of the engine, so that the engine outputs torque based on the torque output value after torque filtering.

[0076] In some embodiments, the first determining module 301 is specifically used for:

[0077] If the current opening of the accelerator pedal is less than the preset opening, and the rate of change of the current opening of the accelerator pedal is less than the rate of change of the preset opening, then the turbocharger is determined to be in a surge-prone state.

[0078] If the current gearbox gear changes and the current rate of change of accelerator pedal opening is less than the preset rate of change, then the turbocharger is determined to be in a surge-prone state.

[0079] In some embodiments, the second determining module 302 is specifically used for:

[0080] If the engine's current torque is less than the engine's required torque, then torque filtering is performed.

[0081] If the current rate of change of engine torque is less than the critical rate of change of surge torque, then torque filtering is determined.

[0082] If the pre-calibrated torque filter calibration value is the preset value, then torque filtering will be performed.

[0083] In some embodiments, the fourth determining module 304 is specifically used for:

[0084] The smaller of the unknown torque change rate and the pre-calibrated torque change rate constant is taken as the target torque change rate;

[0085] Based on the target torque change rate and the engine's required torque, determine the unknown torque output value;

[0086] Based on the unknown torque output value and the engine's current torque, determine the torque output value of the engine after torque filtering.

[0087] In some embodiments, the fourth determining module 304 is specifically used for:

[0088] The larger of the undetermined torque output value and the engine's current torque is used as the torque output value after torque filtering.

[0089] Based on the same concept, embodiments of this application also provide an electronic device, the implementation of which can refer to the implementation of the above-described method, and repeated details will not be described again. Figure 4 As shown, the electronic device includes a memory 401 and a processor 402;

[0090] Memory 401 is used to store instructions;

[0091] The processor 402 is configured to execute instructions stored in the memory 401, and when the processor 402 executes the instructions stored in the memory, the device performs the control method for suppressing surge as described above.

[0092] Furthermore, embodiments of this application also provide a computer storage medium storing instructions that, when executed on a computer, cause the computer to perform the surge suppression control method described in any of the preceding claims.

[0093] This application provides a control method, apparatus, device, and storage medium for suppressing surge. The method includes: determining that the turbocharger is in a surge-prone state based on the current accelerator pedal opening information and the transmission gear; determining to perform torque filtering based on the engine's current torque, current torque change rate, or a pre-calibrated torque filtering calibration value; determining a desired torque change rate from a pre-set correspondence between the transmission gear, engine demand torque, and a desired torque change rate, based on the current transmission gear and the engine's required torque; and determining the engine's torque output value after torque filtering based on the desired torque change rate, a pre-calibrated torque change rate constant, and the engine's current torque, so that the engine outputs torque based on the filtered torque output value. Because this application can determine the filtered torque output value based on the torque change rate after determining that the turbocharger is in a surge-prone state, surge can be suppressed.

[0094] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application 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.

[0095] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should 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. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0096] 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.

[0097] 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.

[0098] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A control method for suppressing surge, characterized in that, include: Based on the current accelerator pedal opening information and transmission gear position, it is determined that the turbocharger is in a surge-prone state. Based on the engine's current torque, current torque change rate, or pre-calibrated torque filtering calibration value, determine the torque filtering to be performed; Based on the current gearbox gear and engine torque demand, the unknown torque change rate is determined from the pre-set correspondence between gearbox gear, engine torque demand and unknown torque change rate. Based on the undetermined torque change rate, the pre-calibrated torque change rate constant, and the engine's current torque, the torque output value of the engine after torque filtering is determined, so that the engine outputs torque based on the torque output value after torque filtering.

2. The method as described in claim 1, characterized in that, The determination that the turbocharger is in a surge-prone state based on the current accelerator pedal opening information and transmission gear position includes: If the current opening of the accelerator pedal is less than the preset opening, and the rate of change of the current opening of the accelerator pedal is less than the preset rate of change, then the turbocharger is determined to be in a surge-prone state. If the current gearbox gear changes and the rate of change of the current accelerator pedal opening is less than the preset rate of change, then the turbocharger is determined to be in a surge-prone state.

3. The method as described in claim 1, characterized in that, The determination of torque filtering based on the engine's current torque, current torque change rate, or pre-calibrated torque filtering calibrator includes: If the current torque of the engine is less than the engine's required torque, then torque filtering is determined. If the current torque change rate of the engine is less than the critical surge torque change rate, then torque filtering is determined to be performed. If the pre-calibrated torque filtering calibration value is a preset value, then torque filtering is determined to be performed.

4. The method as described in claim 1, characterized in that, The process of determining the torque output value of the engine after torque filtering, based on the undetermined torque change rate, the pre-calibrated torque change rate constant, and the engine's current torque, includes: The smaller value between the undetermined torque change rate and the pre-calibrated torque change rate constant is taken as the target torque change rate; Based on the target torque change rate and the engine's required torque, determine the unknown torque output value; Based on the unknown torque output value and the current torque of the engine, the torque output value of the engine after torque filtering is determined.

5. The method as described in claim 4, characterized in that, The process of determining the torque output value after torque filtering of the engine based on the undetermined torque output value and the current torque of the engine includes: The larger of the undetermined torque output value and the current torque of the engine is used as the torque output value of the engine after torque filtering.

6. A control device for suppressing surge, characterized in that, include: The first determining module is used to determine whether the turbocharger is in a surge-prone state based on the current accelerator pedal opening information and the gearbox gear position. The second determining module is used to determine whether to perform torque filtering based on the engine's current torque, current torque change rate, or a pre-calibrated torque filtering calibration value. The third determining module is used to determine the unknown torque change rate based on the current gearbox gear and engine torque demand, from the pre-set correspondence between the gearbox gear, engine torque demand and unknown torque change rate. The fourth determining module is used to determine the torque output value of the engine after torque filtering based on the unknown torque change rate, the pre-calibrated torque change rate constant and the current torque of the engine, so that the engine outputs torque based on the torque filtered torque output value.

7. The apparatus as claimed in claim 6, characterized in that, The first determining module is specifically used for: If the current opening of the accelerator pedal is less than the preset opening, and the rate of change of the current opening of the accelerator pedal is less than the preset rate of change, then the turbocharger is determined to be in a surge-prone state. If the current gearbox gear changes and the rate of change of the current accelerator pedal opening is less than the preset rate of change, then the turbocharger is determined to be in a surge-prone state.

8. The apparatus as claimed in claim 6, characterized in that, The second determining module is specifically used for: If the current torque of the engine is less than the engine's required torque, then torque filtering is determined. If the current torque change rate of the engine is less than the critical surge torque change rate, then torque filtering is determined to be performed. If the pre-calibrated torque filtering calibration value is a preset value, then torque filtering is determined to be performed.

9. An electronic device, characterized in that, Including memory and processor; The memory is used to store instructions; The processor is configured to execute instructions stored in the memory, and when the processor executes the instructions stored in the memory, causes the electronic device to perform the method as described in any one of claims 1-5.

10. A computer storage medium, characterized in that, The computer storage medium stores instructions that, when executed on the computer, cause the computer to perform the method as described in any one of claims 1-5.

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