Variable valve system optimization method, device, equipment and storage medium

Abstract

The present application discloses a variable valve system optimization method, device, equipment and storage medium, which relate to the field of engine technology. The method of the present application includes: adjusting the variable valve system to be tested to a preset working condition and obtaining performance index data at a target angle; obtaining a valve system performance index table based on the performance index data combined with the working condition parameters; looking up the table according to the performance calibration rules to determine the working point to be adjusted; adjusting the control system parameters under such working points until the variable valve system to be tested reaches the performance index, so as to complete the global performance optimization. The present invention uses a systematic method to perform comprehensive performance calibration and optimization of the variable valve system, which can cover all combinations of external parameters such as throttle opening, oil temperature and engine speed in all situations, ensuring rapid response, precise control and stable performance under various possible working conditions, significantly improving the use level of the engine and optimizing the driving experience.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a variable valve system optimization method, device, equipment and storage medium. Background Art

[0002] With the rapid development of the global automotive industry, the demand for engine performance is becoming increasingly stringent, especially in terms of power, economy, and environmental friendliness. To meet increasingly stringent emission standards and consumers' high demands for a superior driving experience, modern engine technology continues to evolve towards greater efficiency and environmental friendliness. Variable valve timing (VVT) technology, a key means of improving engine performance, optimizes the combustion process by adjusting valve opening and closing timing, improving engine efficiency and responsiveness while reducing fuel consumption and emissions.

[0003] Although VVT technology has played a significant role in improving engine performance, its performance optimization still faces many challenges. The VVT ​​system needs to operate under variable operating conditions, including different throttle openings, oil temperatures, and engine speeds, all of which affect the performance of the VVT ​​system. Currently, most variable valve system optimizations tend to focus on improving specific operating conditions or local performance, lacking a method that can comprehensively cover various operating conditions and achieve overall performance optimization. As a result, the VVT ​​system may not achieve the expected performance under certain operating conditions, affecting the overall engine efficiency and driving experience.

[0004] Therefore, how to achieve comprehensive performance optimization of the variable valve system to ensure that the expected performance level can be achieved under all possible operating conditions has become a technical problem to be solved in this field. Summary of the Invention

[0005] The main purpose of this application is to provide a variable valve system optimization method, device, equipment and storage medium, aiming to solve the technical problem of how to achieve comprehensive performance optimization of the variable valve system to ensure that the expected performance level can be achieved under all possible working conditions.

[0006] To achieve the above objectives, the present application provides a variable valve system optimization method, the method comprising the following steps:

[0007] Adjusting the variable valve system to be tested to a preset operating condition to obtain performance index data of the variable valve system to be tested at a target control angle;

[0008] Obtaining a valve system performance index table based on the performance index data at the target control angle and the preset working conditions;

[0009] Determine the working point to be adjusted according to the valve system performance index table and performance calibration rules;

[0010] Adjust the control system parameters of the variable valve system to be tested at the working point to be adjusted until the performance index threshold is reached to complete the performance optimization of the variable valve system to be tested.

[0011] Optionally, adjusting the variable valve system to be tested to a preset operating condition and obtaining performance index data of the variable valve system to be tested at a target control angle includes:

[0012] Connecting the variable valve system to be tested to a test bench, and setting test parameters so that the variable valve system to be tested operates according to preset working conditions and remains stable, the test parameters including a preset throttle opening, a preset oil temperature, and a preset engine speed;

[0013] Controlling the variable valve system to be tested to open and close at a target control angle, and recording a curve of the change in the opening and closing angle from when the control command is issued to when the variable valve system remains stable;

[0014] According to the opening and closing angle variation curve, performance index data of the variable valve system to be tested at the target control angle is obtained.

[0015] Optionally, it is characterized in that the obtaining of performance index data of the variable valve system to be tested at a target control angle according to the opening and closing angle variation curve includes:

[0016] According to the opening and closing angle variation curve and the target control angle, the valve delay response time, the system response speed, the valve overshoot angle and the steady-state deviation under the preset working condition and the target control angle are obtained;

[0017] The valve delay response time, system response speed, valve overshoot angle and steady-state deviation are used as the performance indicator data.

[0018] Optionally, obtaining a valve system performance index table based on the performance index data at the target control angle and a preset working condition includes:

[0019] Obtaining a performance data matrix based on the performance indicator data, and using the performance data matrix as an index result;

[0020] Determining an operating condition index item according to the preset operating condition, wherein the operating condition index item includes throttle opening, oil temperature, and engine speed;

[0021] Determining an opening and closing angle index item according to the target control angle;

[0022] A valve system performance index table is obtained based on the working condition index items, opening and closing angle index items, and index results.

[0023] Optionally, determining the working point to be adjusted according to the valve system performance index table and performance calibration rules includes:

[0024] Determining static performance indicators according to the performance calibration rules, wherein the static performance indicators include a response delay threshold, an overshoot angle threshold, and a steady-state deviation threshold;

[0025] determining a dynamic performance index according to the performance calibration rule and the oil temperature, the dynamic performance index including a minimum response control speed;

[0026] A working point in the valve system performance index table that does not meet the static performance index and the dynamic performance index is obtained and used as a working point to be adjusted.

[0027] Optionally, adjusting the control system parameters of the variable valve system to be tested at the working point to be adjusted until a performance indicator threshold is reached includes:

[0028] Determining a target operating condition and a target opening and closing angle according to the working point to be adjusted;

[0029] operating the variable valve system to be tested according to target operating conditions and target opening and closing angles, and determining performance indicator items that do not meet performance calibration rules;

[0030] According to the performance indicator item that does not meet the performance calibration rule, adjust the control system parameters at the working point to be adjusted, the control system parameters including oil pressure and pulse signal duty cycle;

[0031] The adjusted variable valve system is re-operated according to the target operating conditions and the target opening and closing angle to obtain a performance indicator item, and the above steps are repeated until the performance indicator item reaches a performance indicator threshold.

[0032] Optionally, adjusting the control system parameters of the variable valve system to be tested at the working point to be adjusted until a performance indicator threshold is reached further includes:

[0033] When the work point to be adjusted reaches a performance index threshold, obtaining adjacent work points of the work point to be adjusted;

[0034] A performance index check is performed on the adjacent work point. If the adjacent work point does not meet the performance index threshold, the control system parameters under the adjacent work point are adjusted to eliminate the systematic disturbance.

[0035] In addition, to achieve the above-mentioned purpose, the present application further provides a variable valve system optimization device, the variable valve system optimization device comprising:

[0036] a data acquisition module, configured to adjust the variable valve system to be tested to a preset operating condition and obtain performance index data of the variable valve system to be tested at a target control angle;

[0037] a data processing module, configured to obtain a valve system performance index table based on the performance index data at the target control angle and a preset working condition;

[0038] The data processing module is further used to determine the working point to be adjusted according to the valve system performance index table and performance calibration rules;

[0039] The control module is used to adjust the control system parameters of the variable valve system to be tested at the working point to be adjusted until the performance index threshold is reached to complete the performance optimization of the variable valve system to be tested.

[0040] In addition, to achieve the above-mentioned purpose, the present application also provides a variable valve system optimization device, which includes: a memory, a processor, and a variable valve system optimization program stored on the memory and runnable on the processor, and the variable valve system optimization program is configured to implement the steps of the variable valve system optimization method described above.

[0041] In addition, to achieve the above-mentioned purpose, the present application also provides a storage medium, on which a variable valve system optimization program is stored. When the variable valve system optimization program is executed by a processor, the steps of the variable valve system optimization method described above are implemented.

[0042] The present application obtains performance index data of the variable valve system to be tested at a target control angle by adjusting the variable valve system to be tested to a preset working condition; obtains a valve system performance index table based on the performance index data at the target control angle and the preset working condition; determines the working point to be adjusted based on the valve system performance index table and performance calibration rules; adjusts the control system parameters of the variable valve system to be tested at the working point to be adjusted until the performance index threshold is reached, thereby completing the performance optimization of the variable valve system to be tested.

[0043] In summary, this application uses a systematic approach to perform comprehensive performance calibration and optimization of the variable valve system, which can cover all combinations of external parameters such as throttle opening, oil temperature and engine speed in all situations, ensuring rapid response, precise control and stable performance under various possible working conditions, significantly improving the engine's utilization level and optimizing the driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0046] Figure 1 This is a flow chart of the first embodiment of the variable valve system optimization method of the present application;

[0047] Figure 2 This is a flow chart of a second embodiment of the variable valve system optimization method of the present application;

[0048] Figure 3 This is a schematic diagram of the functional modules of the variable valve system optimization device of this application;

[0049] Figure 4 It is a structural diagram of the terminal device of the hardware operating environment involved in the embodiment of the present application.

[0050] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0051] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0052] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0053] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, mobile phone, etc., or an electronic device capable of performing the above functions, a variable valve system optimization device, etc. The following uses the variable valve system optimization device as an example to illustrate this embodiment and the following embodiments.

[0054] The present invention provides a variable valve system optimization method, referring to Figure 1 , Figure 1 This is a flowchart of the first embodiment of the present application.

[0055] In this embodiment, the variable valve system optimization method includes:

[0056] Step S10: adjusting the variable valve system to be tested to a preset working condition, and obtaining performance index data of the variable valve system to be tested at a target control angle.

[0057] It should be noted that, since the technical problem to be solved in this application is to achieve comprehensive performance optimization of the variable valve system, that is, various possible working conditions need to be tested to see whether they can meet the corresponding performance requirements under the working conditions, and each working condition contains two levels of factors. On the one hand, it is the performance of the VVT ​​system when external factors are determined, and on the other hand, it is the performance of the VVT ​​system when the control instructions are determined. The throttle opening, oil temperature and engine speed belong to the former, and the control instructions specifically refer to the angle at which the VVT ​​system needs to open and close. The performance requirements of the VVT ​​system refer to a series of predetermined performance indicators that the system should achieve under these determined working conditions to ensure that the engine can exhibit optimal performance under various operating conditions.

[0058] It is understood that the VVT ​​system refers to the "Variable Valve Timing" system, which is an engine technology used to optimize the intake and exhaust processes of internal combustion engines. The variable valve system controls the timing of valve opening and closing through electronic signals, thereby improving engine efficiency, power output, fuel economy, and reducing emissions. The main functions of the variable valve system include adjusting the opening and closing time of the intake valve and / or exhaust valve according to the operating state of the engine, and increasing the intake volume by adjusting the valve timing at different engine speeds. The timing of valve opening or closing is relative to the position of the crankshaft angle. That is, by precisely controlling this angle, the engine can achieve optimal performance under different operating conditions.

[0059] It should be understood that by monitoring the VVT ​​system's response to control commands, including the process from the initial valve position to reaching the target angle, a series of performance indicators can be used to characterize the VVT ​​system's precise control level, such as the delay threshold, overshoot angle threshold, steady-state deviation threshold, and minimum response control speed. The delay threshold refers to the time interval between the issuance of a control command and the start of the VVT ​​system's response. This indicator measures the system's response speed, namely, how quickly the system can execute the control command. A shorter delay time indicates a faster system response. The overshoot angle threshold refers to the maximum value by which the VVT ​​system may exceed the target angle during the process of reaching the target angle. This indicator reflects the system's stability and control accuracy during the control process. A smaller overshoot angle threshold indicates less fluctuation in the system's control process and higher control accuracy. The steady-state deviation threshold refers to the deviation between the actual angle and the target angle after the VVT ​​system reaches the target angle and operates stably. This indicator measures whether the system can maintain precise angle control over long periods of operation. A smaller steady-state deviation indicates greater system control stability and accuracy. Minimum Response Control Speed ​​(MSS) is the average speed required for the VVT ​​system to move from 10% to 90% of the target angle. This metric measures the system's speed during adjustment, specifically how quickly it can change from one angle to another. A higher MSS indicates a faster system adjustment.

[0060] Step S20: obtaining a valve system performance index table according to the performance index data at the target control angle and the preset working conditions.

[0061] It should be noted that since the external variables related to the working conditions include the throttle opening, oil temperature and engine speed, the actual test is carried out by generating multiple test conditions one by one in a sweeping manner according to a certain step size according to the three external parameters of the variable valve system during operation. Then, the system is operated on the test bench according to the test conditions and remains unchanged. After the system stabilizes, the variable valve system is controlled to execute the target angle instruction. The target angle gradually increases from 0° to 90° according to a certain step size, and then falls back to 0°. The difference between the target angle and the actual angle opening and closing execution results after the control instruction is issued is statistically analyzed to obtain the control performance at each target angle. Finally, the data under all working conditions are summarized to obtain the valve system performance index table.

[0062] Step S30: determining the working point to be adjusted according to the valve system performance index table and performance calibration rules.

[0063] It should be noted that the performance calibration rules refer to the performance requirements that the variable valve system needs to meet under any operating conditions. Only when all operating conditions meet this requirement can the variable valve system be considered to have achieved global optimization.

[0064] In one embodiment, determining the working point to be adjusted based on the valve system performance index table and the performance calibration rules includes: determining static performance indicators based on the performance calibration rules, the static performance indicators including a response delay threshold, an overshoot angle threshold, and a steady-state deviation threshold; determining dynamic performance indicators based on the performance calibration rules and the engine oil temperature, the dynamic performance indicators including a minimum response control speed; obtaining a working point in the valve system performance index table that does not meet the static performance indicators and the dynamic performance indicators, and using it as the working point to be adjusted.

[0065] Optionally, the performance calibration rule means that for any set valve target opening and closing angle, the actual response delay time of the VVT ​​angle shall not exceed 50ms; when VVT regulation overshoots or undershoots occur, the maximum deviation of the overshoot shall not exceed 5% of the VVT ​​maximum rotation angle; when the VVT ​​regulation reaches a stable state, the difference between the VVT ​​target angle and the actual angle shall not exceed 2 crankshaft angle degrees; in addition, since the system response speed is closely related to the engine speed and oil temperature, the system response speed is calculated by dividing the VVT ​​angle change from the target angle position of 10% to 90% by the change time to obtain the average speed. For all speed points with oil temperature below 10 degrees, the response speed shall not be less than 20° / s, and for oil temperature above 10 degrees, the response speed shall not be less than 80° / s. It should be noted that the system response speed is the only one of the four performance indicators that requires the combination of external parameters to obtain, and the other three do not require the intervention of external parameters.

[0066] It should be understood that "undetermined operating points" refer to those specific operating conditions or status points identified during the performance calibration and optimization process of the engine's variable valve timing (VVT) system that fail to meet established performance requirements, based on the performance index map and pre-set performance calibration rules. Since the aforementioned performance requirements encompass four key areas, any failure to meet any of these requirements constitutes an unadjusted operating point, requiring further adjustment and optimization to ensure that it meets the expected performance standards. Furthermore, since any operating point corresponds to a set of operating conditions (external parameters) and an execution angle (execution target), the actual valve system performance index table is at least a two-dimensional data table. Consequently, each operating point has a corresponding position within the data table, determined by a specific combination of operating conditions and execution angles.

[0067] Step S40: adjusting the control system parameters of the variable valve system to be tested at the working point to be adjusted until the performance index threshold is reached, so as to complete the performance optimization of the variable valve system to be tested.

[0068] In one embodiment, the control system parameters of the variable valve system to be tested at the working point to be adjusted until the performance index threshold is reached include: determining the target operating condition and the target opening and closing angle according to the working point to be adjusted; operating the variable valve system to be tested according to the target operating condition and the target opening and closing angle, and determining the performance index items that do not meet the performance calibration rules; adjusting the control system parameters at the working point to be adjusted according to the performance index items that do not meet the performance calibration rules, the control system parameters including oil pressure and pulse signal duty cycle; re-operating the adjusted variable valve system according to the target operating condition and the target opening and closing angle to obtain the performance index items, and repeating the above steps until the performance index items reach the performance index threshold.

[0069] It's important to note that control system parameter adjustments include, but are not limited to, program-level control logic settings for a specific operating point, such as oil pressure, PWM duty cycle, and electronic control signal timing. These parameters directly impact the performance of the variable valvetrain system. Because this process involves debugging at the digital circuit level, minor external disturbances can lead to variations in the debugging process for each operating point. The debugging process is inherently results-oriented, so the actual optimization process simply ensures that the control at the current operating point meets the performance threshold.

[0070] It is understandable that adjustments to a specific work site may have a chain reaction or systemic impact on adjacent work sites. Therefore, after the work site is debugged and meets the requirements, preventive measures need to be taken to avoid performance issues that may occur in the future by identifying and verifying adjacent work sites in advance.

[0071] In one embodiment, the adjusting of the control system parameters of the variable valve system to be tested at the working point to be adjusted until a performance index threshold is reached further includes: after the working point to be adjusted reaches the performance index threshold, obtaining an adjacent working point of the working point to be adjusted; performing a performance index check on the adjacent working point, and if the adjacent working point does not meet the performance index threshold, adjusting the control system parameters at the adjacent working point to eliminate systematic disturbances.

[0072] It should be understood that such preventive measures can reduce performance fluctuations between operating conditions, ensure a smooth transition from one operating condition to another, and improve the continuity and smoothness of the system response.

[0073] The present application obtains performance index data of the variable valve system to be tested at a target control angle by adjusting the variable valve system to be tested to a preset working condition; obtains a valve system performance index table based on the performance index data at the target control angle and the preset working condition; determines the working point to be adjusted based on the valve system performance index table and performance calibration rules; adjusts the control system parameters of the variable valve system to be tested at the working point to be adjusted until the performance index threshold is reached, thereby completing the performance optimization of the variable valve system to be tested.

[0074] In summary, this application uses a systematic approach to perform comprehensive performance calibration and optimization of the variable valve system, which can cover all combinations of external parameters such as throttle opening, oil temperature and engine speed in all situations, ensuring rapid response, precise control and stable performance under various possible working conditions, significantly improving the engine's utilization level and optimizing the driving experience.

[0075] Reference Figure 2 , Figure 2 This is a flow chart of the second embodiment of the variable valve system optimization method of the present application. Based on the above-mentioned first embodiment, the second embodiment of the variable valve system optimization method of the present application is proposed.

[0076] In this embodiment, step S10 includes:

[0077] Step S101: connecting the variable valve system to be tested to a test bench, and setting test parameters so that the variable valve system to be tested operates according to preset working conditions and remains stable.

[0078] It should be noted that the test bench is used to simulate various operating conditions that an actual engine may encounter in a vehicle. On the test bench, parameters such as throttle opening, oil temperature and engine speed need to be set to match the preset operating conditions.

[0079] Step S102: controlling the variable valve system to be tested to open and close at a target control angle, and recording a curve of the change in the opening and closing angle from when the control instruction is issued to when the variable valve system opens and closes stably.

[0080] It should be noted that the opening and closing angle change curve of the variable valve system refers to the graphical representation of the change of the valve opening and closing angle over time in the variable valve timing (VVT) system, from the time the valve receives the control command to the time it reaches the target opening and closing angle and maintains this angle stably.

[0081] Step S103: acquiring performance index data of the variable valve system to be tested at a target control angle according to the opening and closing angle variation curve.

[0082] It's understandable that the time it takes for a valve to start moving from a stationary state reflects the system's response speed, while the time it takes for the valve to reach the target angle reflects the system's dynamic response performance. If the valve opening and closing angle exceeds the target angle and then retracts, this indicates overshoot. The length of time it takes for the valve to reach the target angle and remain stable indicates system stability and control accuracy. Analyzing this curve ensures that the valve timing system provides precise and stable control throughout its operating range.

[0083] Furthermore, according to the opening and closing angle change curve, the performance index data of the variable valve system to be tested at the target control angle is obtained, including: according to the opening and closing angle change curve and the target control angle, the valve delay response time, system response speed, valve overshoot angle and steady-state deviation under the preset working conditions and the target control angle are obtained; the valve delay response time, system response speed, valve overshoot angle and steady-state deviation are used as the performance index data.

[0084] In this embodiment, step S20 includes:

[0085] Step S201: obtaining a performance data matrix according to the performance indicator data, and using the performance data matrix as an index result.

[0086] It should be noted that since the performance index data contains more than one item of data, the multiple data are organized into a structured matrix form to represent the performance index of the work point, which can facilitate rapid retrieval and comparison of performance under different working conditions.

[0087] Step S202: Determine the working condition index item according to the preset working condition.

[0088] It's important to note that operating condition indexes are based on pre-set operating condition parameters, such as throttle position, oil temperature, and engine speed. These parameters define the engine's operating state under specific conditions. For each selected parameter, set one or more specific values. These values ​​will serve as operating condition indexes, identifying different test points.

[0089] Step S203: determining an opening and closing angle index item according to the target control angle.

[0090] It should be noted that the essence of the opening and closing angle is the content of the control instruction. Therefore, the opening and closing angle is different from the operating condition parameters. The opening and closing angle is a command directly issued by the control system, requiring the variable valve system to respond accordingly. The operating condition parameters such as throttle opening, oil temperature and engine speed are external conditions for the operation of the system, so they need to be treated as a separate index item.

[0091] Step S204: obtaining a valve system performance index table according to the working condition index item, the opening and closing angle index item, and the index result.

[0092] As you can see, combining the index results from the previous steps with the operating condition and angle indexes creates a complete, global valvetrain performance indicator table, providing comprehensive data support for system optimization. This process ensures a systematic and accurate performance evaluation, enabling engineers to effectively identify optimization areas and adjust control system parameters.

[0093] This embodiment provides a variable valve system optimization method. This embodiment first connects the variable valve system to a test bench and sets test parameters so that the variable valve system operates according to preset operating conditions and remains stable. The variable valve system is then controlled to open and close at a target control angle, and a curve of the change in opening and closing angles from the time the control command is issued to the time the variable valve system remains stable is recorded. Based on the curve of the change in opening and closing angles, performance index data of the variable valve system at the target control angle is obtained. A performance data matrix is ​​obtained based on the performance index data, and the performance data matrix is ​​used as an index result. Based on the preset operating conditions, an operating condition index item is determined. Based on the target control angle, an opening and closing angle index item is determined. Based on the operating condition index item, the opening and closing angle index item, and the index result, a valve system performance index table is obtained.

[0094] In summary, systematic testing and optimization reduced systemic failures caused by local performance issues, enhancing engine reliability and stability. Furthermore, by precisely controlling valve timing, this solution helped reduce fuel consumption and emissions, meeting environmental regulations. Ultimately, by providing comprehensive data support and optimization guidance, this solution shortened engine development cycles and improved market competitiveness.

[0095] Reference Figure 3 The present application also provides a variable valve system optimization device, the variable valve system optimization device comprising:

[0096] The data acquisition module 10 is used to adjust the variable valve system to be tested to a preset working condition and obtain performance index data of the variable valve system to be tested at a target control angle;

[0097] A data processing module 20 is configured to obtain a valve system performance index table based on the performance index data at the target control angle and a preset working condition;

[0098] The data processing module 20 is further configured to determine the working point to be adjusted based on the valve system performance index table and performance calibration rules;

[0099] The control module 30 is configured to adjust control system parameters of the variable valve system to be tested at the working point to be adjusted until a performance index threshold is reached, thereby completing performance optimization of the variable valve system to be tested.

[0100] In one embodiment, the data acquisition module 10 is also used to connect the variable valve system to be tested to a test bench, set test parameters so that the variable valve system to be tested operates according to preset working conditions and remains stable, and the test parameters include a preset throttle opening, a preset oil temperature, and a preset engine speed; control the opening and closing of the variable valve system to be tested at a target control angle, and record the opening and closing angle change curve from the time when the control instruction is issued to the time when the variable valve system opens and closes stably; and obtain performance index data of the variable valve system to be tested at the target control angle based on the opening and closing angle change curve.

[0101] In one embodiment, the data acquisition module 10 is also used to obtain the valve delay response time, system response speed, valve overshoot angle and steady-state deviation under the preset working conditions and target control angle based on the opening and closing angle change curve and the target control angle; and use the valve delay response time, system response speed, valve overshoot angle and steady-state deviation as the performance indicator data.

[0102] In one embodiment, the data processing module 20 is further used to obtain a performance data matrix based on the performance index data, and use the performance data matrix as an index result; determine the operating condition index items based on the preset operating conditions, and the operating condition index items include throttle opening, oil temperature and engine speed; determine the opening and closing angle index items based on the target control angle; and obtain a valve system performance index table based on the operating condition index items, opening and closing angle index items and index results.

[0103] In one embodiment, the data processing module 20 is further used to determine static performance indicators based on the performance calibration rules, wherein the static performance indicators include a response delay threshold, an overshoot angle threshold, and a steady-state deviation threshold; determine dynamic performance indicators based on the performance calibration rules and the oil temperature, wherein the dynamic performance indicators include a minimum response control speed; and obtain working points in the valve system performance indicator table that do not meet the static performance indicators and the dynamic performance indicators, and use them as working points to be adjusted.

[0104] In one embodiment, the data processing module 20 is further used to determine the target operating condition and the target opening and closing angle according to the working point to be adjusted; operate the variable valve system to be tested according to the target operating condition and the target opening and closing angle to determine the performance index item that does not meet the performance calibration rules; adjust the control system parameters at the working point to be adjusted according to the performance index item that does not meet the performance calibration rules, and the control system parameters include oil pressure and pulse signal duty cycle; re-operate the adjusted variable valve system according to the target operating condition and the target opening and closing angle to obtain the performance index item, and repeat the above steps until the performance index item reaches the performance index threshold.

[0105] In one embodiment, the data processing module 20 is further used to obtain adjacent work points of the work point to be adjusted after the work point to be adjusted reaches a performance index threshold; perform performance index verification on the adjacent work points, and if the adjacent work point does not meet the performance index threshold, adjust the control system parameters under the adjacent work point to eliminate systematic disturbances.

[0106] An embodiment of the present application also provides a variable valve system optimization device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the variable valve system optimization method in the above-mentioned embodiment one.

[0107] Reference below Figure 4 , which shows a schematic diagram of the structure of a variable valve system optimization device suitable for implementing embodiments of the present application. The variable valve system optimization device in embodiments of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 4 The variable valve system optimization device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0108] like Figure 4As shown, the variable valve system optimization device may include a processing device 1001 (e.g., a central processing unit, graphics processing unit, etc.), which can perform various appropriate actions and processes based on programs stored in a read-only memory (ROM) 1002 or programs loaded from a storage device 1003 into a random access memory (RAM) 1004. RAM 1004 also stores various programs and data required for the operation of the variable valve system optimization device. Processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems may be connected to I / O interface 1006: input devices 1007, such as a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008, such as a liquid crystal display (LCD), speaker, vibrator, etc.; storage device 1003, such as a magnetic tape or hard disk; and communication device 1009. Communication device 1009 can allow the variable valve system optimization device to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a variable valve system optimization device with various systems, it should be understood that it is not required to implement or include all of the systems shown. More or fewer systems may alternatively be implemented or included.

[0109] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0110] The variable valve system optimization device provided in this application, utilizing the variable valve system optimization method described in the aforementioned embodiment, addresses the technical problem of achieving comprehensive performance optimization of variable valve systems to ensure that the desired performance level is achieved under all possible operating conditions. Compared to the prior art, the variable valve system optimization device provided in this application achieves the same beneficial effects as the variable valve system optimization method described in the aforementioned embodiment. Other technical features of the variable valve system optimization device are the same as those disclosed in the aforementioned embodiment and are not further elaborated here.

[0111] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0112] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0113] The present application also provides a storage medium, on which a variable valve system optimization program is stored. When the variable valve system optimization program is executed by a processor, the steps of any one of the variable valve system optimization methods described above are implemented.

[0114] The storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this embodiment, the storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0115] The above-mentioned storage medium may be included in the variable valve system optimization device; or may exist independently without being assembled into the variable valve system optimization device.

[0116] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the variable valve system optimization device, the variable valve system optimization device: adjusts the variable valve system to be tested to a preset working condition, and obtains the performance index data of the variable valve system to be tested at the target control angle; obtains a valve system performance index table based on the performance index data at the target control angle and the preset working condition; determines the working point to be adjusted based on the valve system performance index table and the performance calibration rules; adjusts the control system parameters of the variable valve system to be tested at the working point to be adjusted until the performance index threshold is reached, so as to complete the performance optimization of the variable valve system to be tested.

[0117] Computer program code for performing the operations of the present application may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0118] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0119] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0120] The storage medium provided in this application is a computer-readable storage medium storing computer-readable program instructions (i.e., a computer program) for executing the variable valve system optimization method described above. This computer-readable storage medium addresses the technical problem of achieving comprehensive performance optimization of a variable valve system to ensure that the desired performance level is achieved under all possible operating conditions. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application are similar to those of the variable valve system optimization method provided in the aforementioned embodiment and are not further elaborated here.

[0121] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A variable valve system optimization method, characterized in that: The variable valve system optimization method includes: Adjusting the variable valve system to be tested to a preset operating condition to obtain performance index data of the variable valve system to be tested at a target control angle; The step of adjusting the variable valve system to be tested to a preset operating condition and obtaining performance index data of the variable valve system to be tested at a target control angle includes: Connecting the variable valve system to be tested to a test bench, and setting test parameters so that the variable valve system to be tested operates according to preset working conditions and remains stable, the test parameters including a preset throttle opening, a preset oil temperature, and a preset engine speed; Controlling the variable valve system to be tested to open and close at a target control angle, and recording a curve of the change in the opening and closing angle from when the control command is issued to when the variable valve system remains stable; Acquiring performance index data of the variable valve system to be tested at a target control angle according to the opening and closing angle variation curve; The step of obtaining performance index data of the variable valve system to be tested at a target control angle according to the opening and closing angle variation curve includes: According to the opening and closing angle variation curve and the target control angle, the valve delay response time, the system response speed, the valve overshoot angle and the steady-state deviation under the preset working condition and the target control angle are obtained; The valve delay response time, system response speed, valve overshoot angle and steady-state deviation are used as the performance indicator data; Obtaining a valve system performance index table based on the performance index data at the target control angle and the preset working conditions; Determine the working point to be adjusted according to the valve system performance index table and performance calibration rules; Adjust the control system parameters of the variable valve system to be tested at the working point to be adjusted until the performance index threshold is reached to complete the performance optimization of the variable valve system to be tested.

2. The variable valve system optimization method according to claim 1, characterized in that: The valve system performance index table is obtained based on the performance index data at the target control angle and the preset working conditions, including: Obtaining a performance data matrix based on the performance indicator data, and using the performance data matrix as an index result; Determining an operating condition index item according to the preset operating condition, wherein the operating condition index item includes throttle opening, oil temperature, and engine speed; Determining an opening and closing angle index item according to the target control angle; A valve system performance index table is obtained based on the working condition index items, opening and closing angle index items, and index results.

3. The variable valve system optimization method according to claim 1, characterized in that: Determining the working point to be adjusted according to the valve system performance index table and performance calibration rules includes: Determining static performance indicators according to the performance calibration rules, wherein the static performance indicators include a response delay threshold, an overshoot angle threshold, and a steady-state deviation threshold; determining a dynamic performance index according to the performance calibration rule and the oil temperature, the dynamic performance index including a minimum response control speed; A working point in the valve system performance index table that does not meet the static performance index and the dynamic performance index is obtained and used as a working point to be adjusted.

4. The variable valve system optimization method according to claim 1, characterized in that: The step of adjusting the control system parameters of the variable valve system to be tested at the working point to be adjusted until a performance indicator threshold is reached includes: Determining a target operating condition and a target opening and closing angle according to the working point to be adjusted; operating the variable valve system to be tested according to target operating conditions and target opening and closing angles, and determining performance indicator items that do not meet performance calibration rules; According to the performance indicator item that does not meet the performance calibration rule, adjust the control system parameters at the working point to be adjusted, the control system parameters including oil pressure and pulse signal duty cycle; The adjusted variable valve system is re-operated according to the target operating conditions and the target opening and closing angle to obtain a performance indicator item, and the above steps are repeated until the performance indicator item reaches a performance indicator threshold.

5. The variable valve system optimization method according to claim 1, characterized in that: The step of adjusting the control system parameters of the variable valve system to be tested at the working point to be adjusted until the performance index threshold is reached further includes: When the work point to be adjusted reaches a performance index threshold, obtaining adjacent work points of the work point to be adjusted; A performance index check is performed on the adjacent work point. If the adjacent work point does not meet the performance index threshold, the control system parameters under the adjacent work point are adjusted to eliminate the systematic disturbance.

6. A variable valve system optimization device, characterized in that: The variable valve system optimization device includes: a data acquisition module, configured to adjust the variable valve system to be tested to a preset operating condition and obtain performance index data of the variable valve system to be tested at a target control angle; The data acquisition module is further configured to connect the variable valve system to be tested to a test bench, set test parameters so that the variable valve system to be tested operates according to preset operating conditions and remains stable, the test parameters including a preset throttle opening, a preset oil temperature, and a preset engine speed; control the opening and closing of the variable valve system to be tested at a target control angle, and record a curve of opening and closing angle changes from the issuance of a control command to the time when the variable valve system opens and closes stably; and obtain performance indicator data of the variable valve system to be tested at the target control angle based on the opening and closing angle change curve. a data processing module, configured to obtain a valve system performance index table based on the performance index data at the target control angle and a preset working condition; The data processing module is further configured to obtain, based on the opening and closing angle variation curve and the target control angle, a valve delay response time, a system response speed, a valve overshoot angle, and a steady-state deviation under the preset operating condition and the target control angle; and use the valve delay response time, the system response speed, the valve overshoot angle, and the steady-state deviation as the performance indicator data; The data processing module is further used to determine the working point to be adjusted according to the valve system performance index table and performance calibration rules; The control module is used to adjust the control system parameters of the variable valve system to be tested at the working point to be adjusted until the performance index threshold is reached to complete the performance optimization of the variable valve system to be tested.

7. A variable valve system optimization device, characterized in that: The variable valve system optimization device includes: a memory, a processor, and a variable valve system optimization program stored in the memory and executable on the processor, wherein the variable valve system optimization program is configured to implement the steps of the variable valve system optimization method according to any one of claims 1 to 5.

8. A storage medium, characterized in that: The storage medium stores a variable valve system optimization program, which, when executed by a processor, implements the steps of the variable valve system optimization method according to any one of claims 1 to 5.

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