Timing belt drive system noise test method, equipment, storage medium and device

Abstract

The invention discloses a noise testing method, equipment, storage medium and device for a timing belt drive system. The method comprises: upon receiving a noise testing instruction, determining a plurality of noise collection points according to a timing belt drive system model, performing a vibration simulation test according to the timing belt drive system model under a preset idle condition, obtaining a lateral vibration amplitude of each noise collection point, and generating a noise test result of the timing belt drive system model according to the lateral vibration amplitude; compared with the existing method of determining the goose noise of a timing belt drive system by making different timing belt drive system samples for testing; since the invention can quickly determine the noise level of a timing belt drive system model in the early stage of project design, goose noise testing can be performed without making a timing belt drive system sample, thereby shortening the development cycle of the timing belt drive system and reducing the development cost of the timing belt drive system.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a timing belt drive system noise testing method, equipment, storage medium and device. Background Art

[0002] As people's requirements for vehicle comfort are getting higher and higher, the requirements for engine noise, vibration and harshness (NVH) performance are becoming more and more stringent. The timing drive system is an important part of the engine, so the performance of the timing drive system directly affects the NVH performance of the engine.

[0003] Since the timing belt drive system has lower friction loss and less noise, the timing belt drive system is often used as the timing drive system of the vehicle in the prior art. However, when the vehicle is parked or the engine is idling, the timing belt has a large goose noise, which leads to a poor user experience.

[0004] In the prior art, the goose noise of the timing belt drive system is often determined by making different timing belt drive system samples and performing noise tests. However, the above method has the disadvantages of high development cost and long development cycle.

[0005] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0006] The main purpose of the present invention is to provide a timing belt drive system noise testing method, equipment, storage medium and device, aiming to solve the technical problems of high development cost and long development cycle in the prior art of determining the goose noise of the timing belt drive system by making different timing belt drive system samples for noise testing.

[0007] To achieve the above object, the present invention provides a method for testing noise of a timing belt transmission system, the method comprising the following steps:

[0008] When receiving a noise test instruction, multiple noise collection points are determined according to a timing belt drive system model;

[0009] Under a preset idle condition, a vibration simulation test is performed according to the timing belt drive system model to obtain the lateral vibration amplitude of each noise collection point;

[0010] A noise test result of the timing belt drive system model is generated according to the lateral vibration amplitude.

[0011] Optionally, the step of generating a noise test result of the timing belt drive system model according to the lateral vibration amplitude specifically includes:

[0012] Determining a noise evaluation score of each noise collection point according to the lateral vibration amplitude, and generating an overall noise evaluation score of the timing belt drive system model according to the noise evaluation score;

[0013] A noise test result of the timing belt drive system model is generated according to the overall noise evaluation score.

[0014] Optionally, the step of determining the noise evaluation score of each noise collection point according to the lateral vibration amplitude, and generating the overall noise evaluation score of the timing belt drive system model according to the noise evaluation score specifically includes:

[0015] Generating a lateral vibration amplitude curve graph of the noise collection point according to the lateral vibration amplitude;

[0016] The noise evaluation score of each noise collection point is determined based on the lateral vibration amplitude curve diagram, and the overall noise evaluation score of the timing belt drive system model is generated according to the noise evaluation score.

[0017] Optionally, after the step of generating the noise test result of the timing belt drive system model according to the lateral vibration amplitude, the timing belt drive system noise test method further comprises:

[0018] When the overall noise evaluation score is less than a preset threshold, determining the component information to be optimized according to the noise evaluation score of each noise collection point;

[0019] The timing belt drive system model is adjusted based on the information of the component to be optimized to obtain a target timing belt drive system model.

[0020] Optionally, before the step of determining a plurality of noise collection points according to a timing belt drive system model when receiving a noise test instruction, the timing belt drive system noise test method further includes:

[0021] Acquire a belt strand to be modeled, and select adjacent belt strands from the belt strand to be modeled;

[0022] The belt spans of the adjacent belt strands are adjusted, and a timing belt drive system model is established based on the adjusted adjacent belt strands.

[0023] Optionally, when receiving the noise test instruction, the step of determining a plurality of noise collection points according to the timing belt drive system model specifically includes:

[0024] Upon receiving a noise test instruction, the placement positions of the components are extracted from the timing belt drive system model;

[0025] The middle position of the belt strand is determined based on the placement position, and the middle position of the belt strand is used as a noise collection point.

[0026] Optionally, the step of performing a vibration simulation test according to the timing belt drive system model under a preset idle condition to obtain the lateral vibration amplitude of each noise collection point specifically includes:

[0027] Under a preset idle condition, a vibration simulation test is performed according to the timing belt drive system model to obtain an initial test result;

[0028] The noise frequency range corresponding to the timing belt drive system is found, and the initial test results are screened based on the noise frequency range to obtain the lateral vibration amplitude of each noise collection point.

[0029] In addition, to achieve the above-mentioned purpose, the present invention also proposes a timing belt drive system noise testing device, which includes a memory, a processor, and a timing belt drive system noise testing program stored in the memory and executable on the processor, and the timing belt drive system noise testing program is configured to implement the steps of the timing belt drive system noise testing method as described above.

[0030] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, on which a timing belt drive system noise test program is stored. When the timing belt drive system noise test program is executed by a processor, the steps of the timing belt drive system noise test method as described above are implemented.

[0031] In addition, to achieve the above-mentioned purpose, the present invention also proposes a timing belt transmission system noise test device, the timing belt transmission system noise test device comprising: a collection point determination module, a simulation test module and a result generation module;

[0032] The collection point determination module is used to determine a plurality of noise collection points according to the timing belt drive system model when receiving a noise test instruction;

[0033] The simulation test module is used to perform a vibration simulation test according to the timing belt drive system model under a preset idle condition to obtain the lateral vibration amplitude of each noise collection point;

[0034] The result generating module is used to generate the noise test result of the timing belt drive system model according to the lateral vibration amplitude.

[0035] The present invention discloses that when a noise test instruction is received, a plurality of noise collection points are determined according to a timing belt drive system model, and under a preset idle condition, a vibration simulation test is performed according to the timing belt drive system model to obtain a lateral vibration amplitude of each noise collection point, and a noise test result of the timing belt drive system model is generated according to the lateral vibration amplitude. Compared with the existing method of determining the goose noise of the timing belt drive system by making different timing belt drive system samples for testing; since the present invention can quickly determine the noise level of the timing belt drive system model in the early stage of project design, the goose noise test can be performed without making a timing belt drive system sample, thereby shortening the development cycle of the timing belt drive system and reducing the development cost of the timing belt drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a noise testing device for a timing belt drive system in a hardware operating environment involved in an embodiment of the present invention;

[0037] Figure 2 It is a schematic flow chart of a first embodiment of a method for testing noise of a timing belt transmission system of the present invention;

[0038] Figure 3 A schematic diagram of a timing belt drive system model of an embodiment of a timing belt drive system noise testing method of the present invention;

[0039] Figure 4 It is a schematic flow chart of a second embodiment of a method for testing noise of a timing belt transmission system of the present invention;

[0040] Figure 5 It is a flow chart of a third embodiment of a method for testing noise of a timing belt transmission system of the present invention;

[0041] Figure 6 This is a structural block diagram of the first embodiment of the timing belt drive system noise testing device 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] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the structure of a noise test device for a timing belt drive system in the hardware operating environment involved in an embodiment of the present invention.

[0045] like Figure 1As shown, the timing belt drive system noise test device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, 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), and the user interface 1003 may also include a standard wired interface and a wireless interface. The wired interface of the user interface 1003 may be a USB interface in the present invention. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM), or a stable memory (Non-volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0046] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the timing belt drive system noise test equipment, and may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0047] like Figure 1 As shown, the memory 1005 identified as a computer storage medium may include an operating system, a network communication module, a user interface module, and a timing belt drive system noise test program.

[0048] exist Figure 1 In the timing belt drive system noise test device 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 user device; the timing belt drive system noise test device calls the timing belt drive system noise test program stored in the memory 1005 through the processor 1001, and executes the timing belt drive system noise test method provided by the embodiment of the present invention.

[0049] Based on the above hardware structure, an embodiment of a noise testing method for a timing belt drive system of the present invention is proposed.

[0050] Reference Figure 2 , Figure 2 The figure is a flow chart of the first embodiment of the method for testing noise of a timing belt transmission system of the present invention, and provides the first embodiment of the method for testing noise of a timing belt transmission system of the present invention.

[0051] Step S10: upon receiving the noise test instruction, determining a plurality of noise collection points according to the timing belt drive system model.

[0052] It should be understood that the executor of the method of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a server and a computer, or other electronic devices that can achieve the same or similar functions, and this embodiment does not limit this.

[0053] It should be noted that the noise test instruction can be input by the user through the user interaction interface of the timing belt transmission system noise test device. When the user inputs the noise test instruction, it means that the user wants to test the noise level of the timing belt transmission system model.

[0054] For ease of understanding, refer to Figure 3 This is for illustration only, but does not limit this solution. Figure 3 It is a schematic diagram of the timing belt drive system model. The timing belt drive system model in the figure consists of an exhaust VVT pulley, an intake VVT ​​pulley, a tensioner, an idler and a crankshaft pulley. The middle position span1 between the crankshaft pulley and the idler pulley, the middle position span2 between the idler pulley and the intake VVT ​​pulley, the middle position span3 between the intake VVT ​​pulley and the exhaust VVT pulley, the middle position span4 between the exhaust VVT pulley and the tensioner pulley, and the middle position span5 between the tensioner pulley and the crankshaft pulley are used as noise collection points.

[0055] Step S20: Under a preset idle condition, a vibration simulation test is performed according to the timing belt drive system model to obtain the lateral vibration amplitude of each noise collection point.

[0056] It should be understood that, under the preset idle condition, a vibration simulation test is performed on the timing belt drive system model to obtain the lateral vibration amplitude of each noise collection point. The lateral vibration amplitude of each noise collection point can be obtained by performing a vibration simulation test on the timing belt drive system model under the preset idle condition based on a preset timing belt drive system dynamics simulation analysis model.

[0057] It should be noted that the preset timing belt drive system dynamics simulation analysis model can be composed of a timing belt drive system model, a tensioner module, an intake valve system module, an exhaust valve system module, and a crankshaft rotation excitation module. Among them, the timing belt drive model includes the design layout of the timing belt drive system and detailed belt parameters, the tensioner module includes the detailed tensioner layout and parameters, the intake valve system module includes all intake valves driven on the intake camshaft, the exhaust valve system module includes all exhaust valves driven on the exhaust camshaft and the loads such as the high-pressure fuel pump driven at the rear end, and the crankshaft rotation excitation module includes the rotational inertia of the crankshaft system, which is used to apply crankshaft rotation excitation.

[0058] It can be understood that the preset timing belt drive system dynamics simulation analysis model can simulate the actual operation of the timing belt drive system model at idle speed, thereby obtaining the lateral vibration amplitude of each noise collection point in the timing belt drive system model.

[0059] Step S30: generating a noise test result of the timing belt drive system model according to the lateral vibration amplitude.

[0060] It should be noted that the natural frequency of the belt strand is the main cause of idle goose noise, which is mainly transmitted to the outside through the lateral vibration of the belt strand. The change in the idle goose noise energy is positively correlated with the change in the lateral vibration amplitude of the belt strand in the frequency domain. Therefore, the lateral vibration amplitude of the middle position of the belt strand in the range of 200-500Hz under idle conditions is used as an evaluation index of the belt idle goose noise.

[0061] It should be understood that generating the noise test result of the timing belt drive system model based on the lateral vibration amplitude can be to search for the noise test result corresponding to the lateral vibration amplitude in a preset test result table. Among them, the preset test result table contains the correspondence between the lateral vibration amplitude and the noise test result, and the correspondence between the lateral vibration amplitude and the noise test result can be preset by the manager of the timing belt drive system noise test equipment. For example, the manager of the timing belt drive system noise test equipment can preset the noise test result corresponding to the lateral vibration amplitude of 0.10-0.15mm as an acceptable level, the noise test result corresponding to the lateral vibration amplitude of 0.05-0.1mm as a good noise level, and the noise test result corresponding to the lateral vibration amplitude of 0-0.05mm as an excellent noise level.

[0062] Furthermore, in order to improve the reliability of the noise test result, the step S30 includes:

[0063] Determining a noise evaluation score of each noise collection point according to the lateral vibration amplitude, and generating an overall noise evaluation score of the timing belt drive system model according to the noise evaluation score;

[0064] A noise test result of the timing belt drive system model is generated according to the overall noise evaluation score.

[0065] In the first embodiment, it is disclosed that when a noise test instruction is received, multiple noise collection points are determined according to a timing belt drive system model, and under a preset idle condition, a vibration simulation test is performed according to the timing belt drive system model to obtain the lateral vibration amplitude of each noise collection point, and the noise test result of the timing belt drive system model is generated according to the lateral vibration amplitude; compared with the existing method of determining the goose noise of the timing belt drive system by making different timing belt drive system samples for testing; since this embodiment can quickly determine the noise level of the timing belt drive system model in the early stage of project design, the goose noise test can be performed without making a timing belt drive system sample, thereby shortening the development cycle of the timing belt drive system and reducing the development cost of the timing belt drive system.

[0066] Reference Figure 4 , Figure 4 This is a flow chart of a second embodiment of a method for testing noise of a timing belt transmission system according to the present invention. Figure 2 The first embodiment shown provides a second embodiment of the timing belt drive system noise testing method of the present invention.

[0067] In the second embodiment, the step S10 includes:

[0068] Step S101: upon receiving a noise test instruction, extracting the placement position of each component from a timing belt drive system model.

[0069] It should be noted that the component may be a component constituting a timing belt drive system model, for example, an exhaust VVT pulley, an intake VVT ​​pulley, a tensioner, an idler, a crankshaft pulley and a belt between the wheels constituting a timing belt drive system model.

[0070] It should be understood that extracting the placement positions of each component from the timing belt drive system model may be extracting information from the timing belt drive system model to obtain the placement positions of each component.

[0071] Step S102: determining a middle position of the belt strand based on the placement position, and using the middle position of the belt strand as a noise collection point.

[0072] It should be noted that the belt strand may be a belt between two rotating wheels, and the middle position of the belt strand may be the middle position of the belt between the two rotating wheels.

[0073] For ease of understanding, refer to Figure 3This is for illustration only, but does not limit this solution. Figure 3 Schematic diagram of the timing belt drive system model. The timing belt drive system model consists of an exhaust VVT pulley, an intake VVT ​​pulley, a tensioner, an idler and a crankshaft pulley. The placement of each component is shown in the figure. The middle position of the belt strand can be determined based on the placement of each component. The middle position of the belt strand between the crankshaft pulley and the idler is determined as span1 based on the placement of the crankshaft pulley and the idler. The middle position of the belt strand between the idler and the intake VVT ​​pulley is determined as span2 based on the placement of the idler and the intake VVT ​​pulley. Based on the placement positions of the intake VVT ​​pulley and the exhaust VVT pulley, the middle position of the belt strands between the intake VVT ​​pulley and the exhaust VVT pulley is determined as span3. Based on the placement positions of the exhaust VVT pulley and the tensioning pulley, the middle position of the belt strands between the exhaust VVT pulley and the tensioning pulley is determined as span4. Based on the placement positions of the tensioning pulley and the crankshaft pulley, the middle position of the belt strands between the tensioning pulley and the crankshaft pulley is determined as span5. Span1, span2, span3, span4 and span5 are used as noise collection points.

[0074] The second embodiment extracts the placement positions of various components from the timing belt drive system model upon receiving a noise test instruction, determines the middle position of the belt strand based on the placement positions, and uses the middle position of the belt strand as the noise collection point, thereby improving the accuracy of the noise collection point.

[0075] In the second embodiment, the step S20 includes:

[0076] Step S201: Under a preset idle condition, a vibration simulation test is performed according to the timing belt drive system model to obtain an initial test result.

[0077] It should be understood that under the preset idle condition, a vibration simulation test is performed on the timing belt drive system model to obtain the initial test result. The initial test result can be obtained by performing a vibration simulation test on the timing belt drive system model under the preset idle condition based on the preset timing belt drive system dynamics simulation analysis model.

[0078] It should be noted that the preset timing belt drive system dynamics simulation analysis model can be composed of a timing belt drive system model, a tensioner module, an intake valve system module, an exhaust valve system module, and a crankshaft rotation excitation module. Among them, the timing belt drive model includes the design layout of the timing belt drive system and detailed belt parameters, the tensioner module includes the detailed tensioner layout and parameters, the intake valve system module includes all intake valves driven on the intake camshaft, the exhaust valve system module includes all exhaust valves driven on the exhaust camshaft and the loads such as the high-pressure fuel pump driven at the rear end, and the crankshaft rotation excitation module includes the rotational inertia of the crankshaft system, which is used to apply crankshaft rotation excitation.

[0079] The preset timing belt drive system dynamics simulation analysis model can simulate the actual operation of the engine timing system at idle speed.

[0080] Step S202: searching for a noise frequency range corresponding to the timing belt drive system, and screening the initial test results based on the noise frequency range to obtain the lateral vibration amplitude of each noise collection point.

[0081] It should be understood that searching for the noise frequency range corresponding to the timing belt drive system may be searching for the noise frequency range corresponding to the timing belt drive system in a preset noise table. The preset noise table includes the correspondence between the timing belt drive system and the noise frequency range, and the correspondence between the timing belt drive system and the noise frequency range may be preset by the manager of the timing belt drive system noise test equipment. For example, the manager of the timing belt drive system noise test equipment may preset 200-500Hz as the noise frequency range corresponding to the timing belt drive system. This is because the idle goose noise of the timing belt drive system exhibits low-frequency characteristics, and the frequency range is generally 200-500Hz. The idle condition is obvious, and the noise gradually disappears as the speed and load increase.

[0082] It is understandable that screening the initial test results based on the noise frequency range to obtain the lateral vibration amplitude of each noise collection point may be to collect the lateral vibration amplitude of each noise collection point within the range of 200-500 Hz.

[0083] The second embodiment obtains initial test results by performing a vibration simulation test according to a timing belt drive system model under a preset idle condition, finds the noise frequency range corresponding to the timing belt drive system, and screens the initial test results based on the noise frequency range to obtain the lateral vibration amplitude of each noise collection point, so that the actual operation of the engine timing system idle condition can be simulated through the simulation model, and the lateral vibration amplitude of each noise collection point can be determined. In addition, since this example can screen the initial test results based on the noise frequency range, the accuracy of the lateral vibration amplitude can be guaranteed.

[0084] In the second embodiment, the step S30 includes:

[0085] Step S301: determining a noise evaluation score of each noise collection point according to the lateral vibration amplitude, and generating an overall noise evaluation score of the timing belt drive system model according to the noise evaluation score.

[0086] It should be noted that the natural frequency of the belt strand is the main cause of idle goose noise, which is mainly transmitted to the outside through the lateral vibration of the belt strand. The change in the idle goose noise energy is positively correlated with the change in the lateral vibration amplitude of the belt strand in the frequency domain. Therefore, the lateral vibration amplitude of the middle position of the belt strand in the range of 200-500Hz under idle conditions is used as an evaluation index of the belt idle goose noise.

[0087] The noise evaluation score is used to indicate the noise level. The higher the noise evaluation score, the lower the noise.

[0088] It is understandable that determining the noise evaluation score of each noise collection point according to the lateral vibration amplitude can be to search for the noise evaluation score corresponding to the lateral vibration amplitude in a preset score table. The preset score table contains the correspondence between the lateral vibration amplitude and the noise evaluation score. For example, the noise evaluation score corresponding to the lateral vibration amplitude of 0.10-0.15mm is 6 points, the noise evaluation score corresponding to the lateral vibration amplitude of 0.05-0.1mm is 7 points, and the noise evaluation score corresponding to the lateral vibration amplitude of 0-0.05mm is 8 points.

[0089] It should be understood that generating the overall noise evaluation score of the timing belt transmission system model according to the noise evaluation scores may be to use the minimum noise evaluation score as the overall noise evaluation score of the timing belt transmission system model.

[0090] Furthermore, in order to better select the minimum noise evaluation score, the step S301 includes:

[0091] Generating a lateral vibration amplitude curve graph of the noise collection point according to the lateral vibration amplitude;

[0092] The noise evaluation score of each noise collection point is determined based on the lateral vibration amplitude curve diagram, and the overall noise evaluation score of the timing belt drive system model is generated according to the noise evaluation score.

[0093] It should be noted that the lateral vibration amplitude curve diagram is used to represent the lateral vibration amplitude of each noise collection point.

[0094] It should be understood that the noise evaluation score of each noise collection point can be directly obtained through the lateral vibration amplitude curve of each noise collection point.

[0095] Step S302: generating a noise test result of the timing belt drive system model according to the overall noise evaluation score.

[0096] It can be understood that generating the noise test result of the timing belt drive system model according to the overall noise evaluation score may be to use the overall noise evaluation score as the noise test result of the timing belt drive system model.

[0097] The second embodiment determines the noise evaluation score of each noise collection point according to the lateral vibration amplitude, generates an overall noise evaluation score of the timing belt drive system model according to the noise evaluation score, and generates the noise test result of the timing belt drive system model according to the overall noise evaluation score, thereby improving the reliability of the noise test result.

[0098] Reference Figure 5 , Figure 5 This is a flow chart of the third embodiment of the timing belt transmission system noise testing method of the present invention. Figure 2 The first embodiment shown provides a third embodiment of the timing belt drive system noise testing method of the present invention.

[0099] In the third embodiment, before step S10, the method further includes:

[0100] Step S01: obtaining a belt strand to be modeled, and selecting adjacent belt strands from the belt strand to be modeled.

[0101] It should be noted that if the natural frequencies of adjacent belt strands are the same, resonance will occur, resulting in further increase in goose noise. Therefore, when establishing a timing belt drive system model, the natural frequencies of adjacent belt strands should be avoided to be equal.

[0102] Step S02: adjusting the belt span of the adjacent belt strands, and establishing a timing belt transmission system model based on the adjusted adjacent belt strands.

[0103] It should be understood that the formula for calculating the natural frequency of the belt strand is as follows:

[0104]

[0105] Where f0 is the natural frequency of the belt, in mm, l is the belt span of the belt strand, in mm, T is the belt tension of the belt strand, in N, and w is the mass per unit length of the belt strand, in kg / mm.

[0106] According to the above formula, the resonance of adjacent belt strands can be avoided by staggering the belt spans of adjacent belt strands.

[0107] It can be understood that adjusting the belt spans of adjacent belt strands may be staggering the belt spans of adjacent belt strands.

[0108] The third embodiment obtains the belt strands to be modeled, selects adjacent belt strands from the belt strands to be modeled, adjusts the belt spans of the adjacent belt strands, and establishes a timing belt drive system model based on the adjusted adjacent belt strands, thereby being able to avoid increase in goose noise caused by resonance of adjacent belt strands when modeling the timing belt drive system.

[0109] In the third embodiment, after step S30, the method further includes:

[0110] Step S40: when the overall noise evaluation score is less than a preset threshold, determining the component information to be optimized according to the noise evaluation score of each noise collection point.

[0111] It should be noted that the preset threshold value can be preset by the manager of the timing belt transmission system noise test equipment. For example, the manager of the timing belt transmission system noise test equipment can set 6 points as the preset threshold value in advance.

[0112] It should be understood that when the overall noise evaluation score is less than the preset threshold, it means that the goose noise of the timing belt drive system model is large and the design is unreasonable. Therefore, it is necessary to redesign the timing belt drive system model.

[0113] It can be understood that determining the information of the component to be optimized according to the noise evaluation score of each noise collection point may be to use the component corresponding to the noise collection point whose noise evaluation score is less than a preset threshold as the component to be optimized.

[0114] Step S50: adjusting the timing belt drive system model based on the information of the component to be optimized to obtain a target timing belt drive system model.

[0115] It should be understood that adjusting the timing belt transmission system model based on the information of the components to be optimized may be adjusting the design layout and component parameters of each component to be optimized in the timing belt transmission system model.

[0116] The third embodiment determines the component information to be optimized according to the noise evaluation score of each noise collection point when the overall noise evaluation score is less than a preset threshold, and adjusts the timing belt drive system model based on the component information to be optimized to obtain a target timing belt drive system model. Therefore, when the overall noise evaluation score does not meet the noise requirement, the timing belt drive system model can be adjusted to obtain the target timing belt drive system model that meets the noise requirement.

[0117] In addition, an embodiment of the present invention further proposes a storage medium, on which a timing belt drive system noise test program is stored. When the timing belt drive system noise test program is executed by a processor, the steps of the timing belt drive system noise test method as described above are implemented.

[0118] In addition, refer to Figure 6 , the embodiment of the present invention further proposes a timing belt transmission system noise test device, the timing belt transmission system noise test device comprises: a collection point determination module 10, a simulation test module 20 and a result generation module 30;

[0119] The collection point determination module 10 is used to determine a plurality of noise collection points according to the timing belt drive system model when receiving a noise test instruction.

[0120] It should be noted that the noise test instruction can be input by the user through the user interaction interface of the timing belt transmission system noise test device. When the user inputs the noise test instruction, it means that the user wants to test the noise level of the timing belt transmission system model.

[0121] For ease of understanding, refer to Figure 3 This is for illustration only, but does not limit this solution. Figure 3 It is a schematic diagram of the timing belt drive system model. The timing belt drive system model in the figure consists of an exhaust VVT pulley, an intake VVT ​​pulley, a tensioner, an idler and a crankshaft pulley. The middle position span1 between the crankshaft pulley and the idler pulley, the middle position span2 between the idler pulley and the intake VVT ​​pulley, the middle position span3 between the intake VVT ​​pulley and the exhaust VVT pulley, the middle position span4 between the exhaust VVT pulley and the tensioner pulley, and the middle position span5 between the tensioner pulley and the crankshaft pulley are used as noise collection points.

[0122] The simulation test module 20 is used to perform a vibration simulation test according to the timing belt drive system model under a preset idle condition to obtain the lateral vibration amplitude of each noise collection point.

[0123] It should be understood that, under the preset idle condition, a vibration simulation test is performed on the timing belt drive system model to obtain the lateral vibration amplitude of each noise collection point. The lateral vibration amplitude of each noise collection point can be obtained by performing a vibration simulation test on the timing belt drive system model under the preset idle condition based on a preset timing belt drive system dynamics simulation analysis model.

[0124] It should be noted that the preset timing belt drive system dynamics simulation analysis model can be composed of a timing belt drive system model, a tensioner module, an intake valve system module, an exhaust valve system module, and a crankshaft rotation excitation module. Among them, the timing belt drive model includes the design layout of the timing belt drive system and detailed belt parameters, the tensioner module includes the detailed tensioner layout and parameters, the intake valve system module includes all intake valves driven on the intake camshaft, the exhaust valve system module includes all exhaust valves driven on the exhaust camshaft and the loads such as the high-pressure fuel pump driven at the rear end, and the crankshaft rotation excitation module includes the rotational inertia of the crankshaft system, which is used to apply crankshaft rotation excitation.

[0125] It can be understood that the preset timing belt drive system dynamics simulation analysis model can simulate the actual operation of the timing belt drive system model at idle speed, thereby obtaining the lateral vibration amplitude of each noise collection point in the timing belt drive system model.

[0126] The result generating module 30 is used to generate the noise test result of the timing belt drive system model according to the lateral vibration amplitude.

[0127] It should be noted that the natural frequency of the belt strand is the main cause of idle goose noise, which is mainly transmitted to the outside through the lateral vibration of the belt strand. The change in the idle goose noise energy is positively correlated with the change in the lateral vibration amplitude of the belt strand in the frequency domain. Therefore, the lateral vibration amplitude of the middle position of the belt strand in the range of 200-500Hz under idle conditions is used as an evaluation index of the belt idle goose noise.

[0128] It should be understood that generating the noise test result of the timing belt drive system model based on the lateral vibration amplitude can be to search for the noise test result corresponding to the lateral vibration amplitude in a preset test result table. Among them, the preset test result table contains the correspondence between the lateral vibration amplitude and the noise test result, and the correspondence between the lateral vibration amplitude and the noise test result can be preset by the manager of the timing belt drive system noise test equipment. For example, the manager of the timing belt drive system noise test equipment can preset the noise test result corresponding to the lateral vibration amplitude of 0.10-0.15mm as an acceptable level, the noise test result corresponding to the lateral vibration amplitude of 0.05-0.1mm as a good noise level, and the noise test result corresponding to the lateral vibration amplitude of 0-0.05mm as an excellent noise level.

[0129] Furthermore, in order to improve the reliability of the noise test results, the result generation module 30 is also used to determine the noise evaluation score of each noise collection point according to the lateral vibration amplitude, and generate an overall noise evaluation score of the timing belt drive system model according to the noise evaluation score; and generate the noise test results of the timing belt drive system model according to the overall noise evaluation score.

[0130] In the present embodiment, it is disclosed that when a noise test instruction is received, multiple noise collection points are determined according to a timing belt drive system model, and under a preset idle condition, a vibration simulation test is performed according to the timing belt drive system model to obtain the lateral vibration amplitude of each noise collection point, and a noise test result of the timing belt drive system model is generated according to the lateral vibration amplitude; compared with the existing method of determining the goose noise of the timing belt drive system by making different timing belt drive system samples for testing; since the present embodiment can quickly determine the noise level of the timing belt drive system model in the early stage of project design, the goose noise test can be performed without making a timing belt drive system sample, thereby shortening the development cycle of the timing belt drive system and reducing the development cost of the timing belt drive system.

[0131] Other embodiments or specific implementations of the timing belt drive system noise testing device of the present invention can refer to the above-mentioned method embodiments and will not be described in detail here.

[0132] 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.

[0133] The serial numbers of the embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. In a unit claim that lists several means, several of these means may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order and these words may be interpreted as names.

[0134] 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 can also be implemented 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 a read-only memory image (ROM) / random access memory (RAM), a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0135] 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 testing noise of a timing belt drive system, characterized in that: The timing belt drive system noise testing method comprises the following steps: When receiving a noise test instruction, multiple noise collection points are determined according to a timing belt drive system model; Under a preset idle condition, a vibration simulation test is performed according to the timing belt drive system model to obtain the lateral vibration amplitude of each noise collection point; generating a noise test result of the timing belt drive system model according to the lateral vibration amplitude; Wherein, when receiving the noise test instruction, before determining a plurality of noise collection points according to the timing belt drive system model, the method further includes: Acquire a belt strand to be modeled, and select adjacent belt strands from the belt strand to be modeled; staggering the belt span of the adjacent belt strands with the belt span of the belt to be modeled, and establishing a timing belt drive system model based on the adjusted adjacent belt strands; Wherein, the step of generating the noise test result of the timing belt drive system model according to the lateral vibration amplitude specifically includes: Determining a noise evaluation score of each noise collection point according to the lateral vibration amplitude, and generating an overall noise evaluation score of the timing belt drive system model according to the noise evaluation score; A noise test result of the timing belt drive system model is generated according to the overall noise evaluation score.

2. The timing belt drive system noise testing method according to claim 1, characterized in that: The step of determining the noise evaluation score of each noise collection point according to the lateral vibration amplitude, and generating the overall noise evaluation score of the timing belt drive system model according to the noise evaluation score, specifically includes: Generating a lateral vibration amplitude curve graph of the noise collection point according to the lateral vibration amplitude; The noise evaluation score of each noise collection point is determined based on the lateral vibration amplitude curve diagram, and the overall noise evaluation score of the timing belt drive system model is generated according to the noise evaluation score.

3. The timing belt drive system noise testing method according to claim 1, characterized in that: After the step of generating the noise test result of the timing belt drive system model according to the lateral vibration amplitude, the timing belt drive system noise test method further includes: When the overall noise evaluation score is less than a preset threshold, determining the component information to be optimized according to the noise evaluation score of each noise collection point; The timing belt drive system model is adjusted based on the information of the component to be optimized to obtain a target timing belt drive system model.

4. The method for testing noise of a timing belt drive system according to any one of claims 1 to 3, characterized in that: The step of determining a plurality of noise collection points according to the timing belt drive system model upon receiving the noise test instruction specifically includes: Upon receiving a noise test instruction, the placement positions of the components are extracted from the timing belt drive system model; The middle position of the belt strand is determined based on the placement position, and the middle position of the belt strand is used as a noise collection point.

5. The method for testing noise of a timing belt drive system according to any one of claims 1 to 3, characterized in that: The step of performing a vibration simulation test according to the timing belt drive system model under a preset idle condition to obtain the lateral vibration amplitude of each noise collection point specifically includes: Under a preset idle condition, a vibration simulation test is performed according to the timing belt drive system model to obtain an initial test result; The noise frequency range corresponding to the timing belt drive system is found, and the initial test results are screened based on the noise frequency range to obtain the lateral vibration amplitude of each noise collection point.

6. A timing belt drive system noise testing device, characterized in that: The timing belt drive system noise testing device comprises: a memory, a processor and a timing belt drive system noise testing program stored in the memory and executable on the processor. When the timing belt drive system noise testing program is executed by the processor, the steps of the timing belt drive system noise testing method as described in any one of claims 1 to 5 are implemented.

7. A storage medium, characterized in that: The storage medium stores a timing belt drive system noise test program, which, when executed by a processor, implements the steps of a timing belt drive system noise test method as described in any one of claims 1 to 5.

8. A timing belt drive system noise testing device, characterized in that: The timing belt transmission system noise testing device comprises: a collection point determination module, a simulation test module and a result generation module; The collection point determination module is used to determine a plurality of noise collection points according to the timing belt drive system model when receiving a noise test instruction; The simulation test module is used to perform a vibration simulation test according to the timing belt drive system model under a preset idle condition to obtain the lateral vibration amplitude of each noise collection point; The result generating module is used to generate a noise test result of the timing belt drive system model according to the lateral vibration amplitude; Wherein, when receiving the noise test instruction, before determining a plurality of noise collection points according to the timing belt drive system model, the method further includes: Acquire the belt strands to be modeled, and select adjacent belt strands from the belt strands to be modeled; stagger the belt spans of the adjacent belt strands with the belt span of the belt to be modeled, and establish a timing belt drive system model based on the adjusted adjacent belt strands; The result generating module is further used to determine the noise evaluation score of each noise collection point according to the lateral vibration amplitude, and to generate the overall noise evaluation score of the timing belt drive system model according to the noise evaluation score; and to generate the noise test result of the timing belt drive system model according to the overall noise evaluation score.

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