Evaluation method and device for variable valve timing of engine, storage medium and vehicle
By acquiring and analyzing multiple evaluation dimensions of engine variable valve timing, establishing evaluation criteria and assigning weight coefficients, the problems of time-consuming and low-accuracy traditional calibration data processing are solved, and efficient and accurate evaluation of variable valve timing is achieved.
Patent Information
- Application Number
- CN202511775763.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-03-20
AI Technical Summary
Traditional variable valve timing calibration data processing relies on manual labor, is time-consuming, has low evaluation accuracy, and cannot perform precise microscopic analysis.
By acquiring multiple evaluation dimensions of the engine's variable valve timing, an analysis template and evaluation criteria are established, individual evaluation scores are determined and weighted coefficients are assigned, and finally, the total evaluation score is calculated to optimize the control logic and improve evaluation accuracy.
It improves the accuracy of variable valve timing evaluation, saves human resources, and enables efficient data analysis and evaluation.
Smart Images
Figure CN121706231A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of engine control technology, and in particular to an evaluation method and device for variable valve timing of an engine, a storage medium, and a vehicle. Background Technology
[0002] With the continuous upgrading of engine electronic control technology and the increasing demands of users for automotive products, ensuring the reliability and robustness of calibration data efficiently and quickly is a major challenge facing the calibration field. Traditional variable valve timing calibration data processing heavily relies on calibration experience and manpower, consuming a lot of time, and cannot perform precise and micro-level data analysis. Furthermore, due to the involvement of human resources, its evaluation accuracy is generally low. Summary of the Invention
[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to provide a method for evaluating variable valve timing in engines, which can improve the accuracy of variable valve timing evaluation and save human resources.
[0004] A second objective of this invention is to provide a computationally readable storage medium.
[0005] The third objective of this invention is to provide an evaluation device for variable valve timing in an engine.
[0006] The fourth objective of this invention is to provide a vehicle.
[0007] To achieve the above objectives, a first aspect of the present invention provides an evaluation method for variable valve timing of an engine. The method includes: acquiring multiple evaluation dimensions of the variable valve timing of the engine; establishing an analysis template and evaluation criteria for each evaluation dimension; determining a single evaluation score for each evaluation dimension based on the analysis template and the evaluation criteria; acquiring a weighting coefficient for each single evaluation score; and determining a total evaluation score for the variable valve timing of the engine based on each single evaluation score and the corresponding weighting coefficient.
[0008] In the engine variable valve timing evaluation method of this invention, multiple evaluation dimensions of engine variable valve timing are first obtained. Then, an analysis template and evaluation standard are established for each evaluation dimension. Based on the analysis template and evaluation standard, a single evaluation score for each evaluation dimension is determined. Then, the weight coefficient of each single evaluation score is obtained. Based on the single evaluation score and the corresponding weight coefficient, the total evaluation score of engine variable valve timing can be determined, thereby improving the evaluation accuracy of variable valve timing and saving human resources.
[0009] In some embodiments of the present invention, the plurality of evaluation dimensions include the variable valve timing angle for warm-up intake, the variable valve timing angle for warm-up exhaust, the variable valve timing angle for hot engine intake, and the variable valve timing angle for hot engine exhaust.
[0010] In some embodiments of the present invention, determining a single evaluation score for each evaluation dimension based on the analysis template and the evaluation criteria includes: calculating the deviation between the same evaluation dimension and the target value for different engines based on the analysis template; and determining a single evaluation score for the evaluation dimension by comparing the deviation with the evaluation criteria for the corresponding evaluation dimension.
[0011] In some embodiments of the present invention, the evaluation criteria include a standard value of the absolute value of the deviation and a response time.
[0012] In some embodiments of the present invention, the method further includes: when the score of the corresponding evaluation dimension is determined to be lower than a preset score based on the single evaluation score, optimizing the control logic of the variable valve timing of the engine until the score of the evaluation dimension is greater than or equal to the preset score.
[0013] In some embodiments of the present invention, the weighting coefficient corresponding to the single evaluation score of the warm-up intake variable valve timing angle or the weighting coefficient corresponding to the single evaluation score of the warm-up exhaust variable valve timing angle is greater than the weighting coefficient corresponding to the single evaluation score of the hot engine intake variable valve timing angle or the weighting coefficient corresponding to the single evaluation score of the hot engine exhaust variable valve timing angle.
[0014] In some embodiments of the present invention, the method further includes setting the total evaluation score to zero when there is a single evaluation score in each individual evaluation score whose product with the corresponding weight coefficient is zero.
[0015] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium storing an evaluation program for engine variable valve timing, wherein when the evaluation program is executed by a processor, the engine variable valve timing evaluation method described in any of the above embodiments is implemented.
[0016] The computer-readable storage medium of this invention executes an engine variable valve timing evaluation program stored thereon via a processor, which can improve the evaluation accuracy of variable valve timing and save human resources.
[0017] To achieve the above objectives, a third aspect of the present invention provides an evaluation device for variable valve timing of an engine. The device includes: an acquisition module for acquiring multiple evaluation dimensions of the variable valve timing of the engine; an establishment module for establishing an analysis template and evaluation criteria for each evaluation dimension; a determination module for determining a single evaluation score for each evaluation dimension based on the analysis template and the evaluation criteria; the acquisition module is further used to acquire a weighting coefficient for each single evaluation score; and the determination module is used to determine the total evaluation score of the variable valve timing of the engine based on each single evaluation score and the corresponding weighting coefficient.
[0018] The engine variable valve timing evaluation device of this invention includes an acquisition module, an establishment module, and a determination module. First, the acquisition module acquires multiple evaluation dimensions of the engine variable valve timing. Then, the establishment module establishes an analysis template and evaluation standard for each evaluation dimension. The establishment module determines a single evaluation score for each evaluation dimension based on the analysis template and evaluation standard. Afterward, the acquisition module acquires the weight coefficient of each single evaluation score, so that the determination module can determine the total evaluation score of the engine variable valve timing based on the single evaluation score and the corresponding weight coefficient. This improves the evaluation accuracy of variable valve timing and saves manpower.
[0019] To achieve the above objectives, a fourth aspect of the present invention provides a vehicle comprising an engine and an engine variable valve timing evaluation device as described in the above embodiments, wherein the engine variable valve timing is scored by the engine variable valve timing evaluation device.
[0020] The vehicle of this invention, through the engine variable valve timing evaluation device described above, can improve the evaluation accuracy of variable valve timing and save manpower.
[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0022] Figure 1 This is a flowchart of an evaluation method for variable valve timing in an engine, which is a component of this invention. Figure 2 This is a schematic diagram of the evaluation device for variable valve timing of an engine in an embodiment of the present invention. Detailed Implementation
[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0024] The following description, with reference to the accompanying drawings, describes an evaluation method and apparatus for variable valve timing of an engine, a storage medium, and a vehicle according to embodiments of the present invention.
[0025] Figure 1 This is a flowchart of an evaluation method for variable valve timing in an engine, which is part of the present invention.
[0026] like Figure 1 As shown, this invention proposes an evaluation method for variable valve timing in engines, which includes the following steps: S10 obtains multiple evaluation dimensions of the engine's variable valve timing.
[0027] S20, Establish analysis templates and evaluation criteria for each evaluation dimension.
[0028] S30 determines the individual evaluation score for each evaluation dimension based on the analysis template and evaluation criteria.
[0029] S40, obtain the weight coefficient for each individual evaluation score.
[0030] S50 determines the total evaluation score for the engine's variable valve timing based on each individual evaluation score and its corresponding weighting coefficient.
[0031] Specifically, the multiple evaluation dimensions in this embodiment include four dimensions: warm-up intake variable valve timing angle, warm-up exhaust variable valve timing angle, hot-engine intake variable valve timing angle, and hot-engine exhaust variable valve timing angle. Then, an analysis template and evaluation criteria are established for each evaluation dimension. The individual evaluation scores for the four dimensions are then determined using these templates and criteria. Each individual evaluation score is multiplied by a weighting coefficient to obtain four products. These four products are then summed to obtain the total evaluation score for the engine's variable valve timing. The weighting coefficient corresponding to either the warm-up intake variable valve timing angle or the warm-up exhaust variable valve timing angle is greater than the weighting coefficient corresponding to either the hot-engine intake variable valve timing angle or the hot-engine exhaust variable valve timing angle. Furthermore, if the product of any individual evaluation score and its corresponding weighting coefficient is zero, the total evaluation score is set to zero.
[0032] In some embodiments of the present invention, determining a single evaluation score for each evaluation dimension based on an analysis template and an evaluation standard includes: calculating the deviation between the same evaluation dimension and the target value for different engines based on the analysis template; and determining a single evaluation score for the evaluation dimension by comparing the deviation with the evaluation standard for the corresponding evaluation dimension.
[0033] Specifically, by analyzing the template, the deviations of more than ten car models from the target value in the same dimension can be statistically analyzed, which can improve the robustness of the evaluation method of this invention and make it applicable to different engine models. After obtaining the deviation, it can be compared with the evaluation criteria to determine the individual rating score for the corresponding evaluation dimension.
[0034] In this embodiment, the evaluation criteria include the standard value of the absolute value of the deviation and the response time.
[0035] In some embodiments of the present invention, the evaluation method for variable valve timing of an engine further includes: when the score of the corresponding evaluation dimension is determined to be lower than a preset score based on a single evaluation score, optimizing the control logic of variable valve timing of the engine until the score of the evaluation dimension is greater than or equal to the preset score.
[0036] Specifically, this embodiment also judges the individual evaluation score of each evaluation dimension. If the individual evaluation score of the evaluation dimension is lower than the preset score, it means that the combustion quality of the engine will deteriorate. Therefore, it is necessary to adjust and optimize the control logic of the variable valve timing of the engine until the score of the evaluation dimension is greater than or equal to the preset score.
[0037] The evaluation method for variable valve timing of an engine according to the present invention is described below with a specific embodiment: When evaluating the warm-up intake variable valve timing angle, the warm-up intake variable valve timing control condition is first extracted by ensuring that the engine oil temperature, engine coolant temperature, and variable valve timing enabling conditions are within the normal operating range. Then, for the segments that meet the condition, the difference between the actual intake variable valve timing angle and the target angle is defined as the deviation between the warm-up intake variable valve timing angle and the target value. Based on big data analysis algorithms and analysis templates, the deviation between the warm-up intake variable valve timing angle and the target value is statistically analyzed for more than 10 vehicle models. The standard for the absolute value of the steady-state deviation is set at 6°. To avoid deviations caused by dynamic condition response delays, a dynamic condition standard is added. The standard for the absolute value of the dynamic condition deviation is set to exceed 6° in less than 3 seconds. Excessive deviation or excessively long response time will cause a deterioration in engine combustion quality. According to the analysis template, after importing the data, a test report is automatically generated. If the threshold is met, a green light will illuminate in the report to indicate a pass; if the threshold is exceeded, a red light will illuminate in the report to indicate a failure. The report also provides optimization directions for variable valve timing pre-control and PID adjustment based on the electronic control logic and historical big data comparison. If the absolute value of the deviation is ≤6°, the score is 100; if the absolute value of the deviation is >6° and the response time exceeds 3 seconds, the score is 0; if the absolute value of the deviation is >6° and the response time does not exceed 3 seconds, the scoring rule is based on the response time: Deviance score between warm-up intake variable valve timing angle and target value = (1 - maximum response time / 3) * 100.
[0038] When evaluating the warm-up exhaust variable valve timing angle, the warm-up exhaust variable valve timing control condition is first extracted by ensuring that the engine oil temperature, engine coolant temperature, and variable valve timing enabling conditions are within the normal operating range. Then, for segments meeting the condition, the difference between the actual exhaust variable valve timing angle and the target angle is defined as the deviation between the warm-up exhaust variable valve timing angle and the target value. Based on big data analysis algorithms and templates, the deviation between the warm-up exhaust variable valve timing angle and the target value was statistically analyzed for more than 10 vehicle models. The standard for the absolute value of the steady-state deviation was set at 6°. To avoid deviations caused by dynamic condition response delays, a dynamic condition standard was added. The absolute value of the dynamic condition deviation standard was set to exceed 6° within 3 seconds. Excessive deviation or excessively long response time will cause a deterioration in engine combustion quality. According to the analysis template, after importing the data, a test report is automatically generated. If the threshold is met, a green light illuminates in the report to indicate a pass; if the threshold is exceeded, a red light illuminates in the report to indicate a failure. The report also provides optimization directions for variable valve timing pre-control and PID adjustment based on the electronic control logic and historical big data comparison. If the absolute value of the deviation is ≤6°, the score is 100; if the absolute value of the deviation is >6° and the response time exceeds 3 seconds, the score is 0; if the absolute value of the deviation is >6° and the response time does not exceed 3 seconds, the scoring rule is based on the response time: Deviation score between warm-up exhaust variable valve timing angle and target value = (1 - maximum response time / 3) * 100.
[0039] When evaluating the hot-engine intake variable valve timing angle, the operating conditions are first extracted by ensuring that the engine oil temperature, engine coolant temperature, and variable valve timing enabling conditions are within the normal operating range. Then, for segments meeting these conditions, the difference between the actual intake variable valve timing angle and the target angle is defined as the deviation between the hot-engine intake variable valve timing angle and the target value. Based on big data analysis algorithms and templates, the deviation between the hot-engine intake variable valve timing angle and the target value is statistically analyzed for over 10 vehicle models. The standard for the absolute value of the steady-state deviation is set at 3°. To avoid deviations caused by dynamic operating condition response delays, a dynamic operating condition standard is added. The standard for the absolute value of the dynamic operating condition deviation is set to exceed 3° within 3 seconds. Excessive deviation or excessively long response time will cause a deterioration in engine combustion quality. According to the analysis template, after importing the data, a test report is automatically generated. If the threshold is met, a green light will illuminate in the report to indicate a pass; if the threshold is exceeded, a red light will illuminate in the report to indicate a failure. The report also provides optimization directions for variable valve timing pre-control and PID adjustment based on the electronic control logic and historical big data comparison. If the absolute value of the deviation is ≤3°, the score is 100; if the absolute value of the deviation is >3° and the response time exceeds 3 seconds, the score is 0; if the absolute value of the deviation is >3° and the response time does not exceed 3 seconds, the scoring rule is based on the response time: Deviance score between hot engine intake variable valve timing angle and target value = (1 - maximum response time / 3) * 100.
[0040] When evaluating the hot-engine exhaust variable valve timing angle, the operating conditions are first extracted by ensuring that the engine oil temperature, engine coolant temperature, and variable valve timing enabling conditions are within the normal operating range. Then, for segments meeting these conditions, the difference between the actual exhaust variable valve timing angle and the target angle is defined as the deviation between the hot-engine exhaust variable valve timing angle and the target value. Based on big data analysis algorithms and templates, the deviation between the hot-engine exhaust variable valve timing angle and the target value is statistically analyzed for over 10 vehicle models. The standard for the absolute value of the steady-state deviation is set at 3°. To avoid deviations caused by dynamic operating condition response delays, a dynamic operating condition standard is added. The standard for the absolute value of the dynamic operating condition deviation is set to exceed 3° within 3 seconds. Excessive deviation or excessively long response time will cause a deterioration in engine combustion quality. According to the analysis template, after importing the data, a test report is automatically generated. If the threshold is met, a green light will illuminate in the report to indicate a pass; if the threshold is exceeded, a red light will illuminate in the report to indicate a failure. The report also provides optimization directions for variable valve timing pre-control and PID adjustment based on the electronic control logic and historical big data comparison. If the absolute value of the deviation is ≤3°, the score is 100; if the absolute value of the deviation is >3° and the response time exceeds 3 seconds, the score is 0; if the absolute value of the deviation is >3° and the response time does not exceed 3 seconds, the scoring rule is based on the response time: Deviation score of variable valve timing angle from target value in hot engine exhaust = (1 - maximum response time / 3) * 100.
[0041] The engine's variable valve timing is scored based on individual evaluation scores corresponding to the four evaluation dimensions mentioned above. Specifically, weights are allocated to each evaluation dimension of the engine's variable valve timing. During warm-up conditions, due to factors such as low cylinder temperatures, low coolant temperatures, and low oil temperatures, the intake and exhaust variable valve timing control has a significant impact on engine combustion quality and is assigned a higher weight. During hot-engine conditions, the impact of variable valve timing control is relatively smaller and is assigned a lower weight. The variable valve timing control score = warm-up intake variable valve timing control score * weight 1 + warm-up exhaust variable valve timing control score * weight 2 + hot-engine intake variable valve timing control score * weight 3 + hot-engine exhaust variable valve timing control score * weight 4. It should be noted that if any one of the dimensions scores 0, the total score is 0.
[0042] In summary, the engine variable valve timing evaluation method of the present invention can improve the evaluation accuracy of variable valve timing and save human resources.
[0043] Furthermore, the present invention proposes a computer-readable storage medium storing an evaluation program for engine variable valve timing, wherein when the evaluation program is executed by a processor, the engine variable valve timing evaluation method of any of the above embodiments is implemented.
[0044] The computer-readable storage medium of this invention executes an engine variable valve timing evaluation program stored thereon via a processor, which can improve the evaluation accuracy of variable valve timing and save human resources.
[0045] Figure 2 This is a schematic diagram of the evaluation device for variable valve timing of an engine in an embodiment of the present invention.
[0046] Furthermore, such as Figure 2 As shown, the present invention proposes an evaluation device 200 for variable valve timing of an engine, which includes an acquisition module 201, an establishment module 202 and a determination module 203.
[0047] The acquisition module 201 is used to acquire multiple evaluation dimensions of the engine's variable valve timing; the establishment module 202 is used to establish the analysis template and evaluation criteria for each evaluation dimension; the determination module 203 is used to determine the single evaluation score for each evaluation dimension based on the analysis template and evaluation criteria; the acquisition module 201 is also used to acquire the weight coefficient of each single evaluation score; and the determination module 203 is also used to determine the total evaluation score of the engine's variable valve timing based on each single evaluation score and the corresponding weight coefficient.
[0048] In some embodiments of the present invention, multiple evaluation dimensions include the variable valve timing angle for warm-up intake, the variable valve timing angle for warm-up exhaust, the variable valve timing angle for hot engine intake, and the variable valve timing angle for hot engine exhaust.
[0049] In some embodiments of the present invention, the determining module 203 is specifically used to: statistically analyze the deviation between the same evaluation dimension and the target value of different engines according to the analysis template; and determine the single evaluation score of the evaluation dimension by comparing the deviation with the evaluation criteria of the corresponding evaluation dimension.
[0050] In some embodiments of the present invention, the evaluation criteria include a standard value of the absolute value of the deviation and the response time.
[0051] In some embodiments of the present invention, the determining module 203 is further configured to: optimize the control logic of the variable valve timing of the engine when the score of the corresponding evaluation dimension is lower than the preset score based on a single evaluation score, until the score of the evaluation dimension is greater than or equal to the preset score.
[0052] In some embodiments of the present invention, the weighting coefficient corresponding to a single evaluation score of the variable valve timing angle for warm-up intake or exhaust is greater than the weighting coefficient corresponding to a single evaluation score of the variable valve timing angle for hot-running intake or exhaust.
[0053] In some embodiments of the present invention, the determining module 203 is further configured to: set the total evaluation score to zero when there is a single evaluation score in each single evaluation score whose product with the corresponding weight coefficient is zero.
[0054] It should be noted that the specific implementation of the engine variable valve timing evaluation device in this embodiment of the invention can be found in the specific implementation of the engine variable valve timing evaluation method in the above embodiments. To avoid redundancy, it will not be described again here.
[0055] In summary, the engine variable valve timing evaluation device of the present invention can improve the evaluation accuracy of variable valve timing and save manpower.
[0056] Furthermore, the present invention proposes a vehicle that includes an engine and an engine variable valve timing evaluation device as described in the above embodiments, wherein the engine variable valve timing is scored by the engine variable valve timing evaluation device.
[0057] The vehicle of this invention, through the engine variable valve timing evaluation device described above, can improve the evaluation accuracy of variable valve timing and save manpower.
[0058] Furthermore, other components and functions of the vehicle in the embodiments of the present invention are known to those skilled in the art, and will not be described in detail here to reduce redundancy.
[0059] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.
[0060] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.
[0061] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0062] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0063] Furthermore, the terms "first," "second," etc., used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this invention can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this invention, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.
[0064] In this invention, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific implementation.
[0065] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A method for evaluating variable valve timing in an engine, characterized in that, The method includes: Obtain multiple evaluation dimensions for the variable valve timing of the engine; Establish analysis templates and evaluation criteria for each evaluation dimension; A single evaluation score for each evaluation dimension is determined based on the analysis template and the evaluation criteria. Obtain the weighting coefficient for each individual evaluation score; The total evaluation score for the engine's variable valve timing is determined based on each individual evaluation score and its corresponding weighting coefficient.
2. The evaluation method for variable valve timing of an engine according to claim 1, characterized in that, The multiple evaluation dimensions include the variable valve timing angle for warm-up intake, the variable valve timing angle for warm-up exhaust, the variable valve timing angle for hot-up intake, and the variable valve timing angle for hot-up exhaust.
3. The evaluation method for variable valve timing of an engine according to claim 1, characterized in that, Based on the analysis template and the evaluation criteria, a single evaluation score is determined for each evaluation dimension, including: Based on the analysis template, the deviations between the same evaluation dimensions and target values for different engines are statistically analyzed. The deviation is compared with the evaluation criteria of the corresponding evaluation dimension to determine the single evaluation score of the evaluation dimension.
4. The evaluation method for variable valve timing of an engine according to claim 3, characterized in that, The evaluation criteria include the absolute value of the deviation and the response time.
5. The evaluation method for variable valve timing of an engine according to claim 1, characterized in that, The method further includes: When the score of the corresponding evaluation dimension is lower than the preset score based on the single evaluation score, the control logic of the variable valve timing of the engine is optimized until the score of the evaluation dimension is greater than or equal to the preset score.
6. The evaluation method for variable valve timing of an engine according to claim 2, characterized in that, The weighting coefficient corresponding to the single evaluation score of the variable valve timing angle for warm-up intake or the single evaluation score of the variable valve timing angle for warm-up exhaust is greater than the weighting coefficient corresponding to the single evaluation score of the variable valve timing angle for hot-running intake or the single evaluation score of the variable valve timing angle for hot-running exhaust.
7. The evaluation method for variable valve timing of an engine according to claim 1, characterized in that, The method further includes: If, in each of the individual evaluation scores, the product of a single evaluation score and its corresponding weight coefficient is zero, then the total evaluation score is set to zero.
8. A computationally readable storage medium, characterized in that, It stores an evaluation program for engine variable valve timing, which, when executed by a processor, implements the engine variable valve timing evaluation method according to any one of claims 1-7.
9. An evaluation device for variable valve timing of an engine, characterized in that, The device includes: The acquisition module is used to acquire multiple evaluation dimensions of the variable valve timing of the engine; Establish a module to create analysis templates and evaluation criteria for each evaluation dimension; The determination module is used to determine a single evaluation score for each evaluation dimension based on the analysis template and the evaluation criteria. The acquisition module is also used to acquire the weight coefficient of each individual evaluation score; The determining module is used to determine the total evaluation score of the engine's variable valve timing based on each individual evaluation score and the corresponding weighting coefficient.
10. A vehicle, characterized in that, The system includes an engine and the engine variable valve timing evaluation device as described in claim 9, wherein the engine variable valve timing is scored by the engine variable valve timing evaluation device.