Methods, devices, and readable storage media for evaluating the squealing of timing chain drive systems

Abstract

The present invention discloses a method for evaluating the howling of a timing chain transmission system, comprising the following steps: obtaining the design parameters of the timing chain transmission system; generating a simulation analysis model of the timing chain transmission system according to the design parameters; obtaining the tight-side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, wherein the tight-side chain order force is a tight-side chain tension of different orders; and determining the howling evaluation level of the timing chain transmission system under the working condition according to the tight-side chain order force. The present invention also discloses a howling evaluation device and a readable storage medium for a timing chain transmission system. By evaluating the howling evaluation level of the timing chain transmission system in advance through a simulation analysis model, the timeliness of the howling evaluation level evaluation can be improved, thereby saving the development cost of the engine.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a method and device for evaluating the howling of a timing chain transmission system, and a readable storage medium. Background Art

[0002] The timing chain drive system can provide the best valve timing suitable for the engine operating conditions, which is crucial to improving the engine's fuel economy and environmental protection. However, during the operation of the timing chain drive system, the meshing process between the chain and the sprocket will cause the timing chain drive system to produce whistling noise, which will affect the comfort and experience of the engine during use.

[0003] In order to solve the whistling noise problem of the timing chain transmission system, in the prior art, the whistling problem of the timing chain is usually identified by testing after the engine sample or prototype vehicle is produced, and then after the whistling problem is identified, the noise is reduced by testing to reduce the whistling noise. In this way, since it is impossible to conduct noise evaluation in time, when the whistling noise does not meet the standard, the samples or prototype vehicles that have been produced need to be repeatedly adjusted, which increases the development cost of the engine. Summary of the invention

[0004] The main purpose of the present invention is to provide a method, device and readable storage medium for evaluating the whistling of a timing chain transmission system, aiming to perform noise evaluation in a timely manner to reduce the development cost of the engine.

[0005] To achieve the above object, the present invention provides a method for evaluating the whistling of a timing chain transmission system, the method comprising the following steps:

[0006] Acquiring design parameters of the timing chain transmission system;

[0007] Generate a simulation analysis model of the timing chain transmission system according to the design parameters;

[0008] Acquiring a tight side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, wherein the tight side chain order force is tight side chain tensions of different orders;

[0009] The howling evaluation level of the timing chain transmission system under this working condition is determined according to the tight side chain order force.

[0010] Optionally, the step of obtaining the tight side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model includes:

[0011] Determining the number of teeth of the driving gear in the timing chain transmission system according to the design parameters;

[0012] Determining a target order of the tight side chain order force according to the number of teeth;

[0013] Based on the simulation analysis model, the tight-side chain order force of the target order of the timing chain transmission system under the working condition is obtained.

[0014] Optionally, before the step of obtaining the target order tight-side chain order force of the timing chain transmission system under the working condition based on the simulation analysis model, the step includes:

[0015] Receive output parameter setting operation;

[0016] The output parameters of the simulation analysis model are set through the output parameter setting operation according to the tight-side chain order force of the target order.

[0017] Optionally, the step of obtaining the target order tight-side chain order force of the timing chain transmission system under the working condition based on the simulation analysis model includes:

[0018] Based on the simulation analysis model, the tight side chain tension of the timing chain transmission system under the working condition is obtained;

[0019] The tight-side chain tension is Fourier expanded according to the target order to obtain the tight-side chain order force of the target order.

[0020] Optionally, before the step of obtaining the tight side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, the step includes:

[0021] Acquire the excitation parameters of the timing chain transmission system corresponding to the working condition;

[0022] The excitation parameters are input into the simulation analysis model to simulate the working condition of the timing chain transmission system.

[0023] Optionally, it is characterized in that the step of determining the howling evaluation level of the timing chain transmission system under the working condition according to the tight side chain order force comprises:

[0024] The howling evaluation level corresponding to the tight side chain order force is obtained according to a preset mapping relationship, wherein the preset mapping relationship is a correspondence between the tight side chain order force and the howling evaluation level.

[0025] Optionally, after the step of determining the howling evaluation level of the timing chain transmission system under the working condition according to the tight-side chain order force, the method further comprises:

[0026] If the howling evaluation level is lower than a preset level, adjusting the design parameters according to the tight side chain order force and the howling evaluation level;

[0027] Return to the step of generating the simulation analysis model according to the design parameters until the howling evaluation level is higher than or equal to the preset level.

[0028] Optionally, after the step of acquiring the tight-side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, the method further comprises:

[0029] Generating a relationship curve between the working condition and the tight side chain order force according to the tight side chain order force and the working condition;

[0030] The relationship curve is displayed.

[0031] In addition, to achieve the above-mentioned purpose, the present invention also provides a squealing evaluation device for a timing chain transmission system, which includes a memory, a processor, and a squealing evaluation program for a timing chain transmission system stored on the processor and executable on the processor, and when the processor executes the squealing evaluation program for the timing chain transmission system, it implements the steps of the squealing evaluation method for the timing chain transmission system as described above.

[0032] In addition, to achieve the above-mentioned purpose, the present invention also provides a readable storage medium, on which a timing chain transmission system howling evaluation program is stored. When the timing chain transmission system howling evaluation program is executed by a processor, the steps of the timing chain transmission system howling evaluation method as described above are implemented.

[0033] In the embodiment of the present invention, by obtaining the design parameters of the timing chain drive system, a simulation analysis model of the timing chain drive system can be generated according to the design parameters before the timing chain drive system is produced, and the tight side chain order force of the timing chain drive system under at least one working condition is obtained based on the simulation analysis model, and then the howling evaluation level of the timing chain drive system under the working condition is determined according to the tight side chain order force. In this way, the simulation analysis model of the timing chain drive system can be used to evaluate the howling evaluation level of the timing chain drive system in advance, so as to avoid the need to adjust the produced prototype vehicle or engine prototype after the howling evaluation level evaluation and testing after the prototype vehicle or engine prototype is produced, and increase the project development cost. Moreover, after the howling evaluation level of the timing chain drive system is evaluated in advance according to the simulation analysis model, the timing chain drive system with the corresponding howling evaluation level can be matched for different types of vehicles, thereby further reducing the development cost of the engine. Therefore, evaluating the howling evaluation level of the timing chain drive system in advance through the simulation analysis model is conducive to saving the development cost of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1A schematic diagram of the structure of a whistling evaluation device for a timing chain transmission system in a hardware operating environment according to an embodiment of the present invention;

[0035] Figure 2 It is a flow chart of a first embodiment of a method for evaluating the whistling of a timing chain transmission system according to the present invention;

[0036] Figure 3 It is a schematic diagram of the composition structure of a timing chain transmission system in an embodiment of a method for evaluating the whistling of a timing chain transmission system of the present invention;

[0037] Figure 4 It is a schematic diagram of the reading position of the tight side chain order force in the first embodiment of the method for evaluating the squeal of the timing chain transmission system of the present invention;

[0038] Figure 5 It is a flow chart of a second embodiment of a method for evaluating the whistling of a timing chain transmission system according to the present invention;

[0039] Figure 6 It is a flow chart of a third embodiment of a method for evaluating the whistling of a timing chain transmission system according to the present invention;

[0040] Figure 7 It is a flow chart of a fourth embodiment of a method for evaluating the whistling of a timing chain transmission system according to the present invention;

[0041] Figure 8 It is a schematic diagram of the relationship curve between the working condition and the tight side chain order force in an embodiment of the squeal evaluation method of the timing chain transmission system of the present invention.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0044] The main solution of the present invention is: to obtain the design parameters of the timing chain transmission system; to generate a simulation analysis model of the timing chain transmission system according to the design parameters; to obtain the tight-side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, wherein the tight-side chain order force is tight-side chain tension of different orders; and to determine the howling evaluation level of the timing chain transmission system under the working condition according to the tight-side chain order force.

[0045] In the prior art, when facing the howling noise problem of the timing chain transmission system, the technical solution usually adopted is to test the howling evaluation level after the engine sample or prototype vehicle is produced. In this way, when the howling evaluation level does not meet the standard, the engine sample or prototype vehicle needs to be modified after production to reduce the howling noise. At this time, the development cost of the engine will increase due to the failure to conduct noise level evaluation in time before production. Therefore, the above solution provided by the present invention aims to improve the timeliness of the howling evaluation level evaluation to save the development cost of the engine.

[0046] Reference Figure 1 , Figure 1 The present invention is a schematic diagram of the structure of a whining evaluation device for a timing chain transmission system in a hardware operating environment according to an embodiment of the present invention.

[0047] like Figure 1 As shown, the whistling evaluation device of the timing chain transmission system may include: a communication bus 1002, a processor 1001, such as a CPU, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the user interface 1003 may optionally include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001.

[0048] Those skilled in the art will understand that Figure 1 The structure of the squeal evaluation device for the timing chain transmission system shown in the figure does not constitute a limitation on the squeal evaluation device for the timing chain transmission system, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0049] exist Figure 1 In the howling evaluation device for the timing chain transmission system shown, the network interface 1004 is mainly used to connect to the background server and communicate data with the background server; the user interface 1003 is mainly used to connect to the client (user end) and communicate data with the client; and the processor 1001 can be used to call the howling evaluation program for the timing chain transmission system stored in the memory 1005, and execute the relevant steps of the following embodiments of the howling evaluation method for the timing chain transmission system.

[0050] Based on the above-mentioned timing chain transmission system squeal evaluation device, a first embodiment of the timing chain transmission system squeal evaluation method of the present invention is proposed.

[0051] Reference Figure 2 In this embodiment, the timing chain transmission system howling evaluation method comprises the following steps:

[0052] Step S10: obtaining design parameters of the timing chain transmission system;

[0053] It should be noted that the design parameters refer to the relevant parameters of the timing chain transmission system designed during the design phase of the timing chain transmission system, which may include the component modules of the timing chain transmission system, the connection relationship between the component modules, the internal structure and operating parameters of the component modules, etc. Since the design parameters of different types of engines are different, no specific limitation is made here.

[0054] In a specific application example, Figure 3 As shown, the component modules of the timing chain transmission system may include: a timing chain transmission module, a tensioner module, an intake valve system module, an exhaust valve system module and a crankshaft rotation excitation module. Among them, the connection relationship between the various component modules of the timing chain transmission system can be: one end of the timing chain transmission system is connected to the intake valve system module, and the other end is connected to the exhaust valve system module, and the tensioner module and the crankshaft rotation excitation module are also connected to the timing chain transmission system. Correspondingly, the internal structure and operating parameters of each component module may include: the design layout and chain parameters of the timing chain transmission module, the tensioner arrangement and damping parameters inside the tensioner module, the arrangement and parameters of all intake valves driven by the intake camshaft of the intake valve system module and the rear-end driven vacuum pump and other loads, the arrangement and parameters of all exhaust valves driven by the exhaust camshaft of the exhaust valve system module and the rear-end driven high-pressure fuel pump and other loads, and the rotational inertia of the crankshaft rotation excitation module for applying crankshaft rotation excitation, etc.

[0055] Furthermore, the whistling evaluation device of the timing chain drive system may include simulation analysis software (e.g., AVL-EXCITE-TIMING DRIVE), and the design parameters of the timing chain drive system may be manually input into the simulation analysis software, or may be imported into the simulation analysis software in the form of a file, or may be imported into the simulation analysis software from the design system of the timing chain drive system. For example, before simulating the timing chain drive system, the user may manually input the design parameters of the timing chain drive system into the simulation analysis software, and the simulation analysis software may automatically generate a simulation analysis model of the timing chain drive system according to the input design parameters; or, the user may pre-prepare a design parameter document of the timing chain drive system, and upload the design parameter document to the simulation analysis software, and the simulation analysis software may automatically generate a simulation analysis model of the timing chain drive system according to the uploaded design parameter document; or, after the user completes the preliminary design of the timing chain drive system in the design system of the timing chain drive system, the user may import the design parameters of the timing chain drive system from the design system into the simulation analysis software, and the simulation analysis software may automatically generate a simulation analysis model of the timing chain drive system according to the imported design parameters. Of course, different simulation software may support different ways of obtaining the design parameters of the timing chain transmission system, which may be selected according to the specific application environment and are not specifically limited here.

[0056] Step S20: generating a simulation analysis model of the timing chain transmission system according to the design parameters;

[0057] After the design parameters are obtained, a simulation analysis model of the timing chain drive system may be generated according to the obtained design parameters, so as to simulate the operation of the timing chain drive system under different working conditions through the simulation analysis model.

[0058] Specifically, the method of generating the simulation analysis model of the timing chain transmission system can be: after the design parameters are input or imported into the simulation analysis software, the simulation analysis software automatically generates the simulation analysis model of the timing chain transmission system according to the design parameters. For example, the simulation analysis software can screen the component modules of the timing chain transmission system according to the design parameters, and then connect and set parameters of the screened component modules according to the design parameters to generate the simulation analysis model of the timing chain transmission system; it can also be: first display the obtained design parameters in the simulation analysis software, and then artificially construct the component modules and connection relationship of the timing chain transmission system according to the displayed design parameters, and then configure the parameters of the constructed timing chain transmission system according to the design parameters to generate the simulation analysis model of the timing chain transmission system, etc.

[0059] Since different simulation analysis software supports different methods of generating simulation analysis models, they are only listed here without limitation.

[0060] Step S30: obtaining a tight side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, wherein the tight side chain order force is tight side chain tensions of different orders;

[0061] The main reason for the whistling of the timing chain drive system is that the meshing process between the chain and the sprocket will produce chain whistling. During the meshing process between the chain and the sprocket, the change in chain whistling energy is positively correlated with the change in the tight-side chain order force. Therefore, the tight-side chain order force can be used as an evaluation index for chain whistling noise. Furthermore, before evaluating the whistling noise, the tight-side chain order force of the timing chain drive system under the preset working conditions must be obtained.

[0062] On the one hand, in order to accurately obtain the tight side chain order force of the timing chain drive system under the preset working condition, it is necessary to simulate the operation of the timing chain drive system under the preset working condition. Here, the preset working condition refers to the operation of the timing chain drive system under different preset operating parameters (such as engine load and engine speed, etc.), wherein different values ​​of the same operating parameter correspond to different working conditions. Optionally, the preset working condition includes at least one working condition, which can be set according to the actual situation.

[0063] In one embodiment, the operation of the timing chain drive system under at least one working condition can be simulated by first obtaining the excitation parameters of the timing chain drive system corresponding to the at least one working condition, for example, the excitation parameters when the speed is 1000 rpm, the excitation parameters when the speed is 1200 rpm, the excitation parameters when the speed is 1400 rpm, etc. Then the excitation parameters are input into the simulation analysis model to simulate the at least one working condition of the timing chain drive system. Here, the excitation parameters of the timing chain drive system may include the crankshaft rotation excitation applied to the crankshaft sprocket, the cylinder pressure applied to the exhaust valve and the intake valve, the high-pressure fuel pump plunger cavity pressure applied to the high-pressure fuel pump plunger, the average load torque applied to the vacuum pump, etc.

[0064] Specifically, different working conditions correspond to different excitation parameters. The excitation parameters corresponding to different working conditions can be determined according to the correspondence between the pre-stored excitation parameters and the working conditions, and then the automatic switching of different working conditions can be realized according to the preset rules, so that the simulation analysis model can automatically simulate the operation of the timing chain transmission system under the at least one working condition according to the excitation parameters corresponding to the different working conditions. Since the howling noise of the timing chain transmission system exhibits an order characteristic, that is, the frequency of the howling noise and the engine speed show a linear relationship: f = n / 60*z, where f is the frequency of the howling noise, in Hz; n is the engine speed, in rpm, and z is the order 1, 2, 3..., that is, under different orders, the frequency of the howling noise increases with the increase of the engine speed. In addition, the howling noise is obvious under various loads within 3000rpm, and there is an increasing trend with the increase of load. In this embodiment, the engine speed in the range of 1000rpm-3000rpm under full load is preferably used as the simulation working condition of the timing chain transmission system, and the calculation step of the engine speed is set to 200rpm, that is, starting from 1000rpm, the working condition is switched every 200rpm. Then, the excitation parameters corresponding to the at least one working condition are obtained, and the obtained excitation parameters are sequentially input into the simulation analysis model, so that the tight side chain order force of the timing chain transmission system under each working condition can be obtained.

[0065] Of course, in some other embodiments, the operating condition parameters corresponding to the at least one operating condition (such as engine load, engine speed, etc.) can be directly input into the simulation analysis model to simulate the operation of the timing chain transmission system under the at least one operating condition, so as to obtain the tight side chain order force of the timing chain transmission system under the at least one operating condition, etc., which is not specifically limited here.

[0066] On the other hand, when obtaining the tight side chain order force of the timing chain transmission system under the at least one working condition, it can be obtained through the simulation analysis model of the timing chain transmission system. Specifically, in order to quickly obtain the tight side chain order force of the timing chain transmission system, a section at any position can be pre-cut during the modeling process, and then the chain order force at a specified position in the section (that is, the tight side chain near the active sprocket end 1 tooth) can be directly read in the simulation analysis software as the tight side chain order force, such as Figure 4 As shown, each working condition is read once. The tight side chain order force here refers to the order forces of different orders obtained by Fourier expansion of the tight side chain tension according to different orders, and the tight side chain tension refers especially to the tension of the tight side chain near the 1st tooth of the driving sprocket end.

[0067] In one embodiment, in order to avoid the situation that the data reading error and the inability to check when directly obtaining the tight side chain order force, the method of obtaining the tight side chain order force of the timing chain transmission system can also be: firstly obtain the tight side chain tension of the timing chain transmission system under the at least one working condition based on the simulation analysis model, and then obtain the tight side chain order force based on the obtained tight side chain tension. In this way, the obtained tight side chain order force can be checked based on the obtained tight side chain tension to improve the accuracy of the obtained tight side chain order force of the timing chain transmission system. Specifically, the tight side chain tension of the timing chain transmission system can be obtained by clicking or region interception on the simulation analysis model, and it is obtained once for each working condition, and then the obtained tight side chain tension can be subjected to Fourier expansion of different orders to obtain the tight side chain order force of different orders under the at least one working condition.

[0068] In some other embodiments, the method for obtaining the tight-side chain order force of the timing chain drive system can also be: first, the electrical characteristic parameters (such as voltage, current, etc.) of the timing chain drive system are obtained based on the simulation analysis model, once for each working condition, and then the tight-side chain tension corresponding to the obtained electrical characteristic parameters is calculated based on the pre-set functional relationship between the electrical characteristic parameters and the tight-side chain tension, and then the tight-side chain tension is subjected to Fourier expansion of different orders to obtain the expanded tight-side chain order forces of different orders, etc.

[0069] Of course, in order to improve the accuracy of the obtained tight side chain order force, at least two of the above methods for obtaining the tight side chain order force of the timing chain transmission system can be used at the same time, and then the tight side chain order forces obtained by different methods are compared. When the tight side chain order forces obtained within the preset range are consistent, the howling evaluation level of the timing chain transmission system under various working conditions is evaluated according to the obtained tight side chain order forces.

[0070] Since different types of simulation analysis models may support different ways of obtaining the tight-side chain order force of the timing chain transmission system, the above ways of obtaining the tight-side chain order force of the timing chain transmission system are merely listed and do not constitute a limitation.

[0071] Step S40: determining the howling evaluation level of the timing chain transmission system under the working condition according to the tight side chain order force;

[0072] In order to improve the comfort and experience during the use of the engine, the howling evaluation level of the timing chain drive system under different working conditions can be divided into levels according to the user's acceptance of the howling noise. That is, the user's acceptance of the howling noise under different tight-side chain order forces can be tested in advance, and then the test data can be used as the basis for dividing the howling evaluation level of the timing chain drive system. In this embodiment, the howling evaluation level of the timing chain drive system can be divided into four levels according to the user's acceptance of the howling noise, namely unacceptable level, acceptable level, good level and excellent level. Optionally, fewer or more levels can be divided according to one's own needs, which are only listed here without specific limitations.

[0073] Optionally, the method of determining the howling evaluation level of the timing chain transmission system under at least one working condition according to the tight-side chain order force may be: first determine the subjective evaluation score corresponding to the tight-side chain order force under the at least one working condition, and then determine the howling evaluation level of the timing chain transmission system according to the subjective evaluation score. For example, if the tight-side chain order force is within a first force range (e.g., 0-4N), the corresponding subjective evaluation score is determined to be a first score (e.g., 8-10 points), and when the subjective evaluation score is the first score, the corresponding howling evaluation level is level one (e.g., excellent level); if the tight-side chain order force is within a second force range (e.g., 4-8N), the corresponding subjective evaluation score is determined to be a second score (e.g., 7 points), and when the subjective evaluation score is the second score, the corresponding howling evaluation level is level two (e.g., good level); If the order force of the tight side chain is within the third force range (e.g., 8-12N), the corresponding subjective evaluation score is determined to be the third score (e.g., 6 points), and when the subjective evaluation score is the third score, the corresponding howling evaluation level is level three (e.g., acceptable level); if the order force of the tight side chain is within the fourth force range (e.g., more than 12N), the corresponding subjective evaluation score is determined to be the fourth score (e.g., 0-5 points), and when the subjective evaluation score is the fourth score, the corresponding howling evaluation level is level four (e.g., unacceptable level). Among them, the first force range is smaller than the second force range, the second force range is smaller than the third force range, and the third force range is smaller than the fourth force range; the first score is greater than the second score, the second score is greater than the third score, and the third score is greater than the fourth score; the first level of the howling evaluation level is higher than the second level, the second level is higher than the third level, and the third level is higher than the fourth level. That is, the order force of the tight side chain is inversely proportional to the subjective evaluation score, and the subjective evaluation score is directly proportional to the howling evaluation level.

[0074] In one embodiment, in order to quickly determine the howling evaluation level of the timing chain transmission system under the at least one working condition, it can be obtained according to a preset mapping relationship. Specifically, a correspondence between the tight side chain order force and the howling evaluation level can be pre-established and stored in a howling evaluation database as a preset mapping relationship. After the tight side chain order force of the timing chain transmission system under the at least one working condition is obtained, the stored preset mapping relationship can be automatically called from the howling evaluation database to determine the howling evaluation level corresponding to the tight side chain order force of the timing chain transmission system under the working condition according to the preset mapping relationship. For example, if the tight-side chain order force is within the first force range, the howling evaluation level of the timing chain transmission system can be determined as level one according to the preset mapping relationship; if the tight-side chain order force is within the second force range, the howling evaluation level of the timing chain transmission system can be determined as level two according to the preset mapping relationship; if the tight-side chain order force is within the third force range, the howling evaluation level of the timing chain transmission system can be determined as level three according to the preset mapping relationship; if the tight-side chain order force is within the fourth force range, the howling evaluation level of the timing chain transmission system can be determined as level four according to the preset mapping relationship.

[0075] This embodiment generates a simulation analysis model of the timing chain drive system through the design parameters of the timing chain drive system, and obtains the tight side chain order force of the timing chain drive system under at least one working condition based on the simulation analysis model, so that the howling evaluation level of the timing chain drive system under different working conditions can be evaluated in advance according to the tight side chain order force in the design stage, and then targeted adjustments can be made according to the evaluated howling evaluation level, avoiding the evaluation and adjustment of the howling evaluation level after the production of the engine sample or the prototype vehicle, which will increase the development cycle and development cost of the engine sample or the prototype vehicle. That is, by evaluating the howling evaluation level of the timing chain drive system under different working conditions in advance through the simulation analysis model, the timeliness of the howling evaluation level evaluation can be improved, so as to save development costs and shorten the development cycle.

[0076] Based on the above embodiment, a second embodiment of the method for evaluating the whistling of a timing chain transmission system of the present invention is proposed. Figure 5 In this embodiment, the timing chain transmission system howling evaluation method comprises the following steps:

[0077] Step S10: obtaining design parameters of the timing chain transmission system;

[0078] Step S20: generating a simulation analysis model of the timing chain transmission system according to the design parameters;

[0079] Step S301: determining the number of teeth of the driving gear in the timing chain transmission system according to the design parameters;

[0080] Step S302: determining a target order of the tight side chain order force according to the number of teeth;

[0081] Step S303: obtaining a target order tight-side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model;

[0082] Step S40: determining the howling evaluation level of the timing chain transmission system under the working condition according to the tight-side chain order force.

[0083] The tight side chain order force includes tight side chain tensions of different orders. However, the whistling noise of the timing chain transmission system is obvious when the number of driving wheel teeth is large. Therefore, in this embodiment, the tight side chain order force corresponding to the number of driving wheel teeth is preferably used as an evaluation index of the whistling evaluation level of the timing chain transmission system, so as to improve the evaluation efficiency of the whistling evaluation level while ensuring the effectiveness of the whistling evaluation level. Here, the number of driving wheel teeth refers to the order force of the order equal to the number of teeth of the driving sprocket. For example, the roller sprocket usually has 19 teeth. For the roller chain solution, the 19-order tight side chain order force can be used as an evaluation index of the whistling evaluation level; the toothed sprocket usually has 23 teeth. For the toothed chain solution, the 23-order tight side chain order force can be used as an evaluation index of the whistling evaluation level.

[0084] Specifically, the design parameters of the timing chain transmission system may include the parameter of the number of teeth of the driving gear in the timing chain transmission system, and thus the number of teeth of the driving gear in the timing chain transmission system may be determined according to the obtained design parameters. Then, according to the number of teeth of the driving gear, the order equal to the number of teeth of the driving gear may be used as the target order of the tight side chain order force. For example, if the number of teeth of the driving gear is 19, the target order of the tight side chain order force is determined to be 19; if the number of teeth of the driving gear is 23, the target order of the tight side chain order force is determined to be 23. Furthermore, when obtaining the tight side chain order force of the timing chain transmission system under different working conditions based on the simulation analysis model, it is not necessary to obtain the tight side chain order forces of all orders. It is only necessary to focus on obtaining the tight side chain order forces of the target order of the timing chain transmission system under different working conditions, so as to achieve an effective evaluation of the howling evaluation level of the timing chain transmission system under different working conditions.

[0085] In one embodiment, in order to quickly obtain the target order of the tight side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, the output parameters of the simulation analysis model can be set in advance according to the target order of the tight side chain order force. For example, the number of teeth of the driving gear in the timing chain transmission system can be used as the output parameter, so that the target order of the tight side chain order force can be quickly determined according to the number of teeth of the driving gear; or, the output parameter of the simulation analysis model is set to the target order of the tight side chain order force, so that even if the working condition changes, the target order of the tight side chain order force under the corresponding working condition can be quickly obtained.

[0086] Specifically, the user can set parameters for the simulation analysis model on the setting interface of the simulation analysis model, and the settable parameters include the internal operating parameters and structural parameters of the simulation analysis model, the working condition parameters or excitation parameters input to the simulation analysis model, and the output parameters of the simulation analysis model. Furthermore, the user can trigger the output parameter setting operation on the setting interface of the simulation analysis model to set the output parameters of the simulation analysis model. In order to quickly obtain the target order of the tight side chain order force under the corresponding working condition, the output parameter of the simulation analysis model can be preferably set to the output parameter of the tight side chain order force of the target order. In this way, after the howling evaluation device of the timing chain transmission system receives the output parameter setting operation, it will first determine the output parameter (tight side chain order force) and the output parameter value (target order) that need to be set corresponding to the output parameter setting operation, and then set the output parameter of the simulation analysis model according to the determined output parameter and output parameter value, so as to set the output parameter of the simulation analysis model to the target order of the tight side chain order force. In this way, based on the simulation analysis model, the target order tight-side chain order force of the timing chain drive system under various working conditions can be directly obtained.

[0087] In another embodiment, in order to obtain the target order of the tight-side chain order force under the at least one working condition based on the simulation analysis model, the tight-side chain tension of the timing chain drive system under the at least one working condition can be first obtained based on the simulation analysis model, and then the tight-side chain tension of the timing chain drive system under the at least one working condition is fitted to obtain a fitting function of the tight-side chain tension and the working condition, and then the fitting function of the tight-side chain tension and the working condition is Fourier expanded according to the target order to obtain the tight-side chain order force of the target order.

[0088] In this embodiment, the target order of the tight-side chain order force is determined by the number of teeth of the driving gear in the timing chain transmission system, and then the tight-side chain order force of the target order of the timing chain transmission system under at least one working condition is obtained based on the simulation analysis model as an evaluation index of the howling evaluation level, without calculating the tight-side chain order forces of all orders, so that the efficiency of the howling evaluation level can be improved while ensuring the effective evaluation of the howling evaluation level.

[0089] Based on the above embodiments, a third embodiment of the method for evaluating the whistling of a timing chain transmission system of the present invention is proposed. Figure 6 In this embodiment, the timing chain transmission system howling evaluation method comprises the following steps:

[0090] Step S10: obtaining design parameters of the timing chain transmission system;

[0091] Step S20: generating a simulation analysis model of the timing chain transmission system according to the design parameters;

[0092] Step S30: obtaining a tight side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, wherein the tight side chain order force is tight side chain tensions of different orders;

[0093] Step S40: determining the howling evaluation level of the timing chain transmission system under the working condition according to the tight side chain order force;

[0094] Step S41: if the howling evaluation level is lower than a preset level, adjusting the design parameters according to the tight side chain order force and the howling evaluation level;

[0095] Step S42: Return to the step of generating the simulation analysis model according to the design parameters until the howling evaluation level is higher than or equal to the preset level.

[0096] Since the noise of the timing chain drive system is evaluated in the design stage, when abnormal noise exists in the timing chain drive system, the design parameters of the timing chain drive system can be adjusted in time to eliminate the abnormal noise existing in the timing chain drive system.

[0097] Specifically, the howling evaluation level required by the timing chain drive system can be pre-set as the preset level according to specific application requirements. Of course, the preset level is not lower than the acceptable level. Different types of vehicles have different noise level requirements. For example, for a vehicle that requires the howling evaluation level to reach an excellent level, the preset level can be set to an excellent level; for a vehicle that requires the howling evaluation level to reach a good level, the preset level can be set to a good level; for a vehicle that requires the howling evaluation level to reach an acceptable level, the preset level can be set to an acceptable level.

[0098] Therefore, when there is at least one working condition where the howling evaluation level is lower than the preset level, it is considered that there is a howling evaluation level lower than the preset level. When there is a howling evaluation level lower than the preset level, it is necessary to adjust the design parameters of the timing chain drive system so that the howling evaluation level lower than the preset level is increased to the preset level or higher than the preset level. Optionally, the design parameters of the timing chain drive system can be adjusted according to the tight-side chain order force and the howling evaluation level. The adjusted design parameters may include sprocket tooth profile, guide rail profile, and tensioner parameters, for example, increasing or decreasing the stiffness and damping of the tensioner, increasing or decreasing the number of arc segments in the guide rail profile and the radius of curvature of each arc segment, etc. Among them, when adjusting the design parameters of the timing chain transmission system according to the tight-side chain order force and the howling evaluation level, it can be specifically to first determine the tight-side chain order force range corresponding to the preset level according to the preset mapping relationship, and then determine the design parameters and adjustment directions to be adjusted according to the tight-side chain order force range corresponding to the preset level, and then determine the adjustment value of the design parameter to be adjusted according to the difference between the current tight-side order force and the tight-side chain order force range. For example, when the chain order force is too small, it is necessary to reduce the stiffness and damping of the tensioner, and / or increase the number of arc segments in the guide rail profile; the greater the difference between the current tight-side order force and the tight-side chain order force range, the greater the adjustment value of the design parameter to be adjusted. Since the specific adjustment parameters and adjustment methods will vary in different application environments, no specific limitations are made here.

[0099] Then, after adjusting the design parameters, the step of generating the simulation analysis model according to the design parameters can be returned based on the adjusted design parameters until the howling evaluation level under all working conditions reaches a preset level or is higher than the preset level. In this way, before production, it can be ensured that the howling evaluation level under all working conditions is higher than or equal to the preset level, so that there is no need to adjust and modify the produced samples after production, which can save development costs.

[0100] This embodiment timely adjusts the design parameters of the timing chain transmission system according to the tight-side chain order force and the howling evaluation level when there is a howling evaluation level lower than the preset level, and returns to the step of generating a simulation analysis model according to the design parameters until the howling evaluation level under all working conditions is higher than or equal to the preset level, so that the howling evaluation level of the timing chain transmission system can be timely adjusted to higher than or equal to the preset level in the design stage to meet the acceptance standard, avoiding the need to spend a lot of time and economic costs on the prototype after production. In this way, by adjusting the design parameters, the effectiveness of the howling evaluation of the timing chain transmission system and the timeliness of the adjustment of the design parameters can be improved, thereby reducing the development cost.

[0101] Based on the above embodiments, a fourth embodiment of the method for evaluating the whistling of a timing chain transmission system of the present invention is proposed. Figure 7 In this embodiment, the timing chain transmission system howling evaluation method comprises the following steps:

[0102] Step S10: obtaining design parameters of the timing chain transmission system;

[0103] Step S20: generating a simulation analysis model of the timing chain transmission system according to the design parameters;

[0104] Step S30: obtaining a tight side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, wherein the tight side chain order force is tight side chain tensions of different orders;

[0105] Step S31: generating a relationship curve between the working condition and the tight side chain order force according to the tight side chain order force and the working condition;

[0106] Step S32: displaying the relationship curve.

[0107] In order to facilitate the user to intuitively check the tight side chain order force of the timing chain transmission system under at least one working condition, in this embodiment, a relationship curve between the working condition and the tight side chain order force can be generated according to the tight side chain order force under different working conditions, and displayed on the display interface. Specifically, after obtaining the tight side chain order force of the timing chain transmission system under different working conditions based on the simulation analysis model of the timing chain transmission system, the relationship curve between the working condition and the tight side chain order force can be generated with the working condition as the horizontal coordinate and the tight side chain order force as the vertical coordinate, so that the user can evaluate the howling evaluation level of the timing chain transmission system under different working conditions according to the generated relationship curve. At this time, if there is a situation where the howling evaluation level does not meet the standard, the user can manually adjust the corresponding design parameters, and the specific adjustment parameters can be set by the user according to their own needs, and no specific limitation is made here.

[0108] Of course, in some other embodiments, in order to more intuitively evaluate the howling evaluation level of the timing chain transmission system under the at least one working condition, the howling evaluation level can be marked in the relationship curve between the working condition and the tight side chain order force, so that the user can more intuitively view the howling evaluation level of the timing chain transmission system under different working conditions through the relationship curve. For example, taking the 19th order roller chain solution and the 23rd order toothed chain solution as examples, the generated relationship curve is as follows: Figure 8 In addition, when displaying the relationship curve between the working condition and the tight side chain order force, the howling evaluation level of the timing chain transmission system under different working conditions can also be determined according to the tight side chain order force, so as to simultaneously generate and display the relationship curve between the working condition and the howling evaluation level, so that the user can intuitively obtain the howling evaluation level corresponding to different working conditions according to the relationship curve between the working condition and the howling evaluation level.

[0109] This embodiment generates a relationship curve between the working condition and the tight-side chain order force according to the tight-side chain order force and the working condition, and displays the generated relationship curve, so that the user can not only check the relationship curve between the working condition and the tight-side chain order force in real time, but also use the relationship curve to facilitate the user to evaluate the howling evaluation level of the timing chain transmission system, so that the evaluated howling evaluation level can better meet the real-time needs of the user.

[0110] In addition, an embodiment of the present invention further provides a readable storage medium, on which a timing chain transmission system howling evaluation program is stored. When the timing chain transmission system howling evaluation program is executed by a processor, the steps of the timing chain transmission system howling evaluation method as described above are implemented.

[0111] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0112] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0113] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, TV, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0114] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for evaluating the whistling of a timing chain transmission system, characterized in that: The method for evaluating the whistling of a timing chain transmission system comprises the following steps: Acquiring design parameters of the timing chain transmission system; Generate a simulation analysis model of the timing chain transmission system according to the design parameters; Based on the simulation analysis model, the tight side chain order force of the timing chain transmission system under at least one working condition is obtained, wherein the tight side chain order force is tight side chain tension of different orders, wherein the tight side chain order force refers to the order forces of different orders obtained by Fourier expansion of the tight side chain tension according to different orders, and the tight side chain tension refers to the tension of the tight side chain near the end of the driving sprocket 1 tooth; The howling evaluation level of the timing chain transmission system under this working condition is determined according to the tight side chain order force.

2. The method for evaluating the squeal of a timing chain transmission system according to claim 1, characterized in that: The step of obtaining the tight side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model comprises: Determining the number of teeth of the driving gear in the timing chain transmission system according to the design parameters; Determining a target order of the tight side chain order force according to the number of teeth; Based on the simulation analysis model, the tight-side chain order force of the target order of the timing chain transmission system under the working condition is obtained.

3. The method for evaluating the squeal of a timing chain transmission system according to claim 2, characterized in that: Before the step of obtaining the target order of the tight side chain order force of the timing chain transmission system under the working condition based on the simulation analysis model, the method includes: Perform output parameter setting operations; The output parameters of the simulation analysis model are set through the output parameter setting operation according to the tight-side chain order force of the target order.

4. The method for evaluating the squeal of a timing chain transmission system according to claim 2, characterized in that: The step of obtaining the target order of the tight side chain order force of the timing chain transmission system under the working condition based on the simulation analysis model comprises: Based on the simulation analysis model, the tight side chain tension of the timing chain transmission system under the working condition is obtained; The tight-side chain tension is Fourier expanded according to the target order to obtain the tight-side chain order force of the target order.

5. The method for evaluating the squeal of a timing chain transmission system according to claim 1, characterized in that: Before the step of obtaining the tight side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, the method includes: Acquire the excitation parameters of the timing chain transmission system corresponding to the working condition; The excitation parameters are input into the simulation analysis model to simulate the working condition of the timing chain transmission system.

6. The method for evaluating the squeal of a timing chain transmission system according to claim 1, characterized in that: The step of determining the howling evaluation level of the timing chain transmission system under the working condition according to the tight side chain order force comprises: The howling evaluation level corresponding to the tight side chain order force is obtained according to a preset mapping relationship, wherein the preset mapping relationship is a correspondence between the tight side chain order force and the howling evaluation level.

7. The method for evaluating the squeal of a timing chain transmission system according to claim 1, characterized in that: After the step of determining the howling evaluation level of the timing chain transmission system under the working condition according to the tight side chain order force, the method includes: If the howling evaluation level is lower than a preset level, adjusting the design parameters according to the tight side chain order force; Return to the step of generating the simulation analysis model according to the design parameters until the howling evaluation level is higher than or equal to the preset level.

8. The method for evaluating the squeal of a timing chain transmission system according to claim 1, characterized in that: After the step of obtaining the tight side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, the method further includes: Generating a relationship curve between the working condition and the tight side chain order force according to the tight side chain order force and the working condition; The relationship curve is displayed.

9. A timing chain transmission system howling evaluation device, characterized in that: The whistling evaluation device of the timing chain transmission system includes a memory, a processor, and a whistling evaluation program of the timing chain transmission system stored in the memory and executable on the processor. When the processor executes the whistling evaluation program of the timing chain transmission system, the steps of the whistling evaluation method of the timing chain transmission system described in any one of claims 1-8 are implemented.

10. A readable storage medium, characterized in that: The readable storage medium stores a timing chain transmission system howling evaluation program, which, when executed by a processor, implements the steps of a timing chain transmission system howling evaluation method as described in any one of claims 1 to 8.

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