A muffler design method, system and computer storage medium

Abstract

The present invention provides a muffler design method, system and computer storage medium. The method includes: detecting engine parameters of an engine, predicting the inlet pipe orifice noise of an initial intake system according to the engine parameters, and determining the required center frequency of the muffler according to the inlet pipe orifice noise; obtaining a plurality of pre-stored muffler size templates, selecting a target muffler size template that meets the design space of the intake system therefrom, and extracting a plurality of design parameters in the target muffler size template; setting virtual environment working conditions, inputting the center frequency of the muffler and the plurality of design parameters, and selecting one of the plurality of design parameters as a single variable parameter for testing; testing the single variable parameter according to the virtual environment working conditions to generate an optimal design parameter corresponding to the single variable parameter. The technical problem of long development cycle and high cost in the muffler structure design in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly relates to a muffler design method, system and computer storage medium. Background Art

[0002] An internal combustion engine converts the chemical energy of fuel into mechanical energy through combustion to drive an automobile to run. A large amount of air is consumed during operation. The intake system is responsible for supplying the required air to the engine. In addition to providing clean and sufficient air for the engine, the intake system also needs to reduce the noise transmitted from the engine end. Therefore, the noise reduction design of the intake system is very important, and a muffler is involved.

[0003] In the prior art, the muffler needs to be adaptively adjusted according to the noise frequency of the engine to meet the elimination of noise in a certain frequency band of the engine. In the development stage of the muffler structure, software analysis means are generally used. It is necessary to first establish a digital model and then adjust the digital model through analysis, resulting in a long development cycle and high cost for the muffler structure development. Summary of the Invention

[0004] Based on this, the object of the present invention is to provide a muffler design method, system and computer storage medium to solve the technical problems of long development cycle and high cost in the muffler structure design in the prior art.

[0005] To achieve the above object, on the one hand, an embodiment of the present invention provides a muffler design method, including:

[0006] Detect the engine parameters of the engine, predict the intake pipe port noise of the initial intake system according to the engine parameters, and determine the required muffler center frequency according to the intake pipe port noise;

[0007] Obtain a plurality of pre-stored muffler size templates, select a target muffler size template that meets the intake system design space, and extract a plurality of design parameters from the target muffler size template;

[0008] Set the virtual environment working conditions, input the muffler center frequency and a plurality of the design parameters, and select one of the plurality of design parameters as a single variable parameter for testing;

[0009] Test the single variable parameter according to the virtual environment working conditions to generate the optimal design parameter corresponding to the single variable parameter.

[0010] As a further preferred solution of the present invention, the step of setting the virtual environment working conditions, inputting the muffler center frequency and a plurality of the design parameters, and selecting one of the plurality of design parameters as a single variable parameter for testing specifically includes:

[0011] Set the speed of sound, input the center frequency of the muffler, and extract the inner diameter of the main pipe, the inner diameter of the cavity, the wall thickness, the length of the center pipe, the perforation diameter, and the number of perforations in the target muffler size template. Select one of the parameters of the inner diameter of the main pipe, the inner diameter of the cavity, the wall thickness, the length of the center pipe, the perforation diameter, and the number of perforations as the single variable parameter.

[0012] As a further preferred embodiment of the present invention, the step of setting the virtual environment working condition, inputting the center frequency of the muffler and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing specifically includes:

[0013] Set the speed of sound, input the center frequency of the muffler, and extract the throat diameter, the throat length, the main pipe diameter, and the volume of the resonance cavity in the target muffler size template. Select one of the parameters of the throat diameter, the throat length, the main pipe diameter, and the volume of the resonance cavity as the single variable parameter.

[0014] As a further preferred embodiment of the present invention, the step of setting the virtual environment working condition, inputting the center frequency of the muffler and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing specifically includes:

[0015] Set the speed of sound and temperature, input the center frequency of the muffler, and extract the main pipe diameter, the wavelength pipe diameter, and the wavelength pipe length in the target muffler size template. Select one of the parameters of the main pipe diameter, the wavelength pipe diameter, and the wavelength pipe length as the single variable parameter.

[0016] As a further preferred embodiment of the present invention, the step of setting the virtual environment working condition, inputting the center frequency of the muffler and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing specifically includes:

[0017] Set the speed of sound and temperature, input the center frequency of the muffler, and extract the inlet and outlet diameter, the cavity diameter, and the cavity length in the target muffler size template. Select one of the parameters of the inlet and outlet diameter, the cavity diameter, and the cavity length as the single variable parameter.

[0018] As a further preferred embodiment of the present invention, after the step of testing the single variable parameter according to the virtual environment working condition and generating the optimal design parameter corresponding to the single variable parameter, the method further includes:

[0019] Obtain the transmission loss curve of the muffler.

[0020] As a further preferred embodiment of the present invention, the step of testing the single variable parameter according to the virtual environment conditions and generating the optimal design parameter corresponding to the single variable parameter specifically includes:

[0021] Calculating the single variable parameter according to the muffler calculation formula, and generating the optimal design parameter corresponding to the single variable parameter.

[0022] As a further preferred embodiment of the present invention, after the step of testing the single variable parameter according to the virtual environment conditions and generating the optimal design parameter corresponding to the single variable parameter, the method further includes:

[0023] Establishing a digital model according to the optimal design parameter.

[0024] On the other hand, an embodiment of the present invention further provides a muffler design system, including:

[0025] A detection module, configured to detect the engine parameters of the engine, predict the inlet pipe port noise of the initial intake system according to the engine parameters, and determine the required muffler center frequency according to the inlet pipe port noise;

[0026] An acquisition module, configured to acquire a plurality of pre-stored muffler size templates, select a target muffler size template that meets the intake system design space therefrom, and extract a plurality of design parameters in the target muffler size template;

[0027] A setting module, configured to set virtual environment conditions, input the muffler center frequency and a plurality of the design parameters, and select one of the plurality of design parameters as a single variable parameter for testing;

[0028] A generation module, configured to test the single variable parameter according to the virtual environment conditions, and generate an optimal design parameter corresponding to the single variable parameter.

[0029] On the other hand, the present invention further provides a computer storage medium, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned method is implemented.

[0030] According to the muffler design method, system and computer storage medium provided by the present invention, by pre-detecting the engine parameters of the engine, predicting the intake pipe orifice noise of the intake system according to the engine parameters, determining the required center frequency of the muffler according to the intake pipe orifice noise, selecting the muffler size template that meets the design space of the intake system, and extracting multiple design parameters from the muffler size template, then setting the virtual environment working conditions, inputting the center frequency of the muffler and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing; according to the virtual environment working conditions, testing the single variable parameter to generate the best design parameter corresponding to the single variable parameter, and through the means of inputting design structure parameters, designing and adjusting for the required silencing frequency, greatly shortening the design and development cycle and cost of the intake system, and solving the technical problems of long development cycle and high cost in the muffler structure design in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a flowchart of the muffler design method in the first embodiment of the present invention;

[0032] Figure 2 It is a structural block diagram of the muffler design system in the second embodiment of the present invention;

[0033] Figure 3 It is a graph of the transmission loss of the perforated resonator in the second embodiment of the present invention;

[0034] Figure 4 It is a graph of the transmission loss of the resonator, throat diameter and throat length in the second embodiment of the present invention;

[0035] Figure 5 It is a graph of the transmission loss of the wavelength tube in the second embodiment of the present invention;

[0036] Figure 6 It is a graph of the transmission loss of the expansion chamber in the second embodiment of the present invention;

[0037] The following specific embodiments will further illustrate the present invention in conjunction with the above drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described and illustrated below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0039] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in such a development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes made on the basis of the technical content disclosed in the present application are only conventional technical means and should not be understood as the content disclosed in the present application being insufficient.

[0040] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0041] Unless otherwise defined, the technical terms or scientific terms involved in this application should have the ordinary meaning understood by those of ordinary skill in the technical field to which this application belongs. The words "a", "an", "one", "the" and the like involved in this application do not indicate a quantity limitation and can represent a singular or plural number. The terms "including", "comprising", "having" and any variations thereof involved in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may further include steps or units not listed, or may further include other steps or units inherent to these processes, methods, products or devices. The terms "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" involved in this application means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0042] An embodiment of the present invention aims to propose a muffler design method, which is applied to the field of automotive technology. Specifically, the intake system is one of the main noise sources of an automobile. The internal combustion engine converts the chemical energy of fuel into mechanical energy through combustion to drive the automobile to run. A large amount of air is consumed during operation. The intake system is responsible for providing the required air for the engine. In addition to providing clean and sufficient air for the engine, the intake system also needs to reduce the noise transmitted from the engine end. In the prior art, the muffler needs to be adaptively adjusted according to the noise frequency of the engine to meet the elimination of the noise in a certain frequency band of the engine. In the development stage of the muffler structure, software analysis means are generally adopted. It is necessary to first establish a digital model, and then adjust the digital model through analysis, resulting in a long development cycle and high cost of the muffler structure.

[0043] In order to solve the above technical problems existing in the prior muffler design method, an embodiment of the present invention aims to provide a muffler design method, which detects the engine parameters of the engine, predicts the inlet pipe orifice noise of the initial intake system according to the engine parameters, and determines the required muffler center frequency according to the inlet pipe orifice noise; obtains a plurality of pre-stored muffler size templates, selects the target muffler size template that meets the intake system design space among them, and extracts a plurality of design parameters in the target muffler size template; sets the virtual environment working condition, inputs the muffler center frequency and a plurality of the design parameters, and selects one of the plurality of design parameters as the single variable parameter for testing; according to the virtual environment working condition, tests the single variable parameter to generate the best design parameter corresponding to the single variable parameter. By means of inputting the design structure parameters, the design and adjustment are carried out for the required noise reduction frequency, greatly shortening the design and development cycle and cost of the intake system.

[0044] Embodiment 1

[0045] Please refer to Figure 1 , which shows the flowchart of the muffler design method in the first embodiment of the present invention. The method includes the following steps:

[0046] Step S101, detect the engine parameters of the engine, predict the inlet pipe orifice noise of the initial intake system according to the engine parameters, and determine the required muffler center frequency according to the inlet pipe orifice noise;

[0047] Specifically, the engine combustion efficiency, power performance, and fuel economy are extracted from the engine parameters. Engine analysis is performed on the engine combustion efficiency, power performance, and fuel economy through an engine thermodynamic model to obtain an engine analysis result. Based on the pipeline acoustics and the engine data, the inlet pipe noise frequency band of the initial intake system is predicted, and the required silencing center frequency is determined according to this noise frequency band. Assuming that the actually measured noise frequency band is between 1800 and 2500 Hz, two-frequency cavities are designed so that the silencing center frequencies are close to 1800 Hz and 2500 Hz.

[0048] Step S102: Obtain multiple pre-stored silencer size templates, select the target silencer size template that meets the intake system design space, and extract multiple design parameters from the target silencer size template.

[0049] Specifically, according to the known test boundaries and pipeline interfaces, the effective space of the silencer is determined. The silencer size template that meets the vehicle design is selected according to the effective space of the silencer. In addition, different specifications of silencers can be selected according to the required silencer center frequency, such as expansion cavity, Helmholtz resonator, wavelength tube, or perforated resonator type silencers.

[0050] Step S103: Set the virtual environment working conditions, input the silencer center frequency and multiple design parameters, and select one of the multiple design parameters as the single variable parameter for testing.

[0051] Specifically, after selecting the silencer size template, according to the known boundaries and pipeline interfaces, some determined design parameters can be obtained. The adjustable design parameters in the silencer are selected as the single variable parameter to meet the design requirements for the silencer center frequency.

[0052] Step S104: Test the single variable parameter according to the virtual environment working conditions to generate the optimal design parameter corresponding to the single variable parameter.

[0053] Specifically, enter the silencer calculation formula in a self-made Excel table, calculate the required single variable by setting the relevant design parameters of the silencer and the required silencer frequency, and then obtain the optimal design parameter of the silencer.

[0054] According to the above muffler design method, by pre-detecting the engine parameters of the engine, predicting the inlet pipe noise of the intake system based on the engine parameters, determining the required center frequency of the muffler according to the inlet pipe noise, selecting the muffler size template that meets the design space of the intake system, extracting multiple design parameters from the muffler size template, then setting the virtual environment conditions, inputting the center frequency of the muffler and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing; according to the virtual environment conditions, testing the single variable parameter to generate the optimal design parameter corresponding to the single variable parameter, and through the means of inputting design structure parameters, designing and adjusting for the required silencing frequency, greatly shortening the design and development cycle and cost of the intake system, and solving the technical problems of long development cycle and high cost in the muffler structure design in the prior art.

[0055] Embodiment 2

[0056] The muffler design method in the second embodiment of the present invention includes the following steps:

[0057] Step S11, detecting the engine parameters of the engine, predicting the inlet pipe noise of the initial intake system according to the engine parameters, and determining the required center frequency of the muffler according to the inlet pipe noise;

[0058] Step S12, obtaining multiple pre-stored muffler size templates, selecting the muffler size template that meets the design space of the intake system, and extracting multiple design parameters from the muffler size template;

[0059] Step S13, setting the virtual environment conditions, inputting the center frequency of the muffler and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing;

[0060] Step S14, testing the single variable parameter according to the virtual environment conditions to generate the optimal design parameter corresponding to the single variable parameter.

[0061] It should be noted that for the parts not described in steps S11, S12 and S13 in this embodiment, reference can be made to the first embodiment.

[0062] Optionally, in this embodiment, in step S13, the steps of setting the virtual environment conditions, inputting the center frequency of the muffler and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing specifically include:

[0063] Set the speed of sound, input the center frequency of the muffler, and extract the inner diameter of the main pipe, the inner diameter of the cavity, the wall thickness, the length of the center pipe, the perforation diameter, and the number of perforations in the target muffler size template. Select one of the parameters of the inner diameter of the main pipe, the inner diameter of the cavity, the wall thickness, the length of the center pipe, the perforation diameter, and the number of perforations as the single variable parameter.

[0064] Specifically, please refer to Figure 3 , which shows the transmission loss curve of the perforated resonator cavity. The structural design of the muffler for the perforated resonator cavity in this solution is generally used in combination. Under the condition of ensuring a certain muffling amplitude, it can solve the problems of broadband, medium and high frequency noise, and is mostly applied to the air filter outlet pipe and the intercooler outlet pipe. Some are also applied to the inside of the air filter.

[0065] In practical applications, the current required muffling frequency is 1800 - 2500 Hz. Input the basic parameters in the transmission loss Excel analysis table, and design two-frequency cavities by adjusting parameters such as the muffling cavity volume and the perforation area, so that their center frequencies are close to 1800 Hz and 2500 Hz. It should be noted that the problem after supercharging is relatively high, which affects the air flow velocity, resulting in a shift of the center frequency. Here, the gas temperature after supercharging needs to be input (about 400 Hz shift at 150 °C compared to normal temperature). To better complete the NVH test, the center frequency can be shifted and several more sets of solutions can be made. The following shows a table of one of the perforated resonator cavity calculations as shown in Table 1:

[0066]

[0067] Table 1

[0068] Optionally, in this embodiment, in step S13, the step of setting the virtual environment working condition, inputting the center frequency of the muffler and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing specifically includes:

[0069] Set the speed of sound, input the center frequency of the muffler, and extract the throat diameter, throat length, main pipe diameter, and resonator cavity volume in the target muffler size template. Select one of the parameters of the throat diameter, throat length, main pipe diameter, and resonator cavity volume as the single variable parameter.

[0070] Specifically, please refer to Figure 4 , which shows the transmission loss curves of the resonator cavity, throat diameter, and throat length. The structural design of the muffler for the resonator cavity in this solution is shown in the following table of one of the resonator cavity calculations as shown in Table 2:

[0071]

[0072] Table 2

[0073] Optionally, in this embodiment, in step S13, the step of setting the virtual environment conditions, inputting the center frequency of the muffler and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing specifically includes:

[0074] Set the speed of sound and temperature, input the center frequency of the muffler, extract the main pipe diameter, wavelength pipe diameter and wavelength pipe length in the target muffler size template, and select one of the main pipe diameter, wavelength pipe diameter and wavelength pipe length as the single variable parameter

[0075] Specifically, please refer to Figure 5 , as shown in the transmission loss curve diagram of the wavelength pipe. The structural design of the muffler for the wavelength pipe in this solution is mainly used to solve a single frequency and is mostly applied to the air filter outlet pipe. The following shows a calculation table for one of the wavelength pipes as shown in Table 3:

[0076]

[0077] Table 3

[0078] Optionally, in this embodiment, in step S13, the step of setting the virtual environment conditions, inputting the center frequency of the muffler and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing specifically includes:

[0079] Set the speed of sound and temperature, input the center frequency of the muffler, extract the inlet and outlet diameter, cavity diameter and cavity length in the target muffler size template, and select one of the inlet and outlet diameter, cavity diameter and cavity length as the single variable parameter.

[0080] Specifically, please refer to Figure 6 , as shown in the transmission loss curve diagram of the expansion chamber. The structural design of the muffler for the expansion chamber in this solution is mainly used to solve medium and low frequencies. The following shows a calculation table for one of the expansion chambers as shown in Table 4:

[0081]

[0082] Table 4

[0083] Furthermore, in this embodiment, in step S14, the step of testing the single variable parameter according to the virtual environment conditions and generating the optimal design parameter corresponding to the single variable parameter further includes:

[0084] Obtain the transmission loss curve of the muffler to evaluate the muffling effect of the muffler.

[0085] Further, in this embodiment, after the step of testing the single variable parameter according to the virtual environment condition and generating the optimal design parameter corresponding to the single variable parameter in step S14, the following steps are further included:

[0086] Establish a digital model according to the optimal design parameter. After obtaining the digital model, it can also be analyzed by LMS software, and at the same time, the transmission loss can be optimized by fine-tuning the digital model.

[0087] According to the above muffler design method, by pre-detecting the engine parameters of the engine, predicting the intake pipe orifice noise of the intake system according to the engine parameters, determining the required muffler center frequency according to the intake pipe orifice noise, selecting the muffler size template that meets the intake system design space, and extracting multiple design parameters from the muffler size template, then setting the virtual environment condition, inputting the muffler center frequency and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing; according to the virtual environment condition, testing the single variable parameter to generate the optimal design parameter corresponding to the single variable parameter, and through the means of inputting the design structure parameters, designing and adjusting for the required silencing frequency, greatly shortening the design and development cycle and cost of the intake system, and solving the technical problems of long development cycle and high cost in the muffler structure design in the prior art.

[0088] Embodiment III

[0089] The present invention also provides a muffler design system, as Figure 2 shown, the system includes:

[0090] A detection module 10 for detecting the engine parameters of the engine, predicting the intake pipe orifice noise of the initial intake system according to the engine parameters, and determining the required muffler center frequency according to the intake pipe orifice noise;

[0091] An acquisition module 20 for acquiring a plurality of pre-stored muffler size templates, selecting the target muffler size template that meets the intake system design space, and extracting multiple design parameters from the target muffler size template;

[0092] A setting module 30 for setting the virtual environment condition, inputting the muffler center frequency and multiple design parameters, and selecting one of the multiple design parameters as the single variable parameter for testing;

[0093] A generation module 40 for testing the single variable parameter according to the virtual environment condition and generating the optimal design parameter corresponding to the single variable parameter.

[0094] Further, the setting module 30 includes:

[0095] A first setting unit 31 for setting the speed of sound, inputting the center frequency of the muffler, extracting the inner diameter of the main pipe, the inner diameter of the cavity, the wall thickness, the length of the central pipe, the perforation diameter, and the number of perforations in the target muffler size template, and selecting one of the parameters of the inner diameter of the main pipe, the inner diameter of the cavity, the wall thickness, the length of the central pipe, the perforation diameter, and the number of perforations as a single variable parameter.

[0096] A second setting unit 32 for setting the speed of sound, inputting the center frequency of the muffler, extracting the diameter of the throat pipe, the length of the throat pipe, the diameter of the main pipe, and the volume of the resonance cavity in the target muffler size template, and selecting one of the parameters of the diameter of the throat pipe, the length of the throat pipe, the diameter of the main pipe, and the volume of the resonance cavity as a single variable parameter.

[0097] A third setting unit 33 for setting the speed of sound and the temperature, inputting the center frequency of the muffler, extracting the diameter of the main pipe, the diameter of the wavelength pipe, and the length of the wavelength pipe in the target muffler size template, and selecting one of the parameters of the diameter of the main pipe, the diameter of the wavelength pipe, and the length of the wavelength pipe as a single variable parameter.

[0098] A fourth setting unit 34 for setting the speed of sound and the temperature, inputting the center frequency of the muffler, extracting the inlet and outlet diameters, the cavity diameter, and the cavity length in the target muffler size template, and selecting one of the parameters of the inlet and outlet diameters, the cavity diameter, and the cavity length as a single variable parameter.

[0099] Further, the system further includes:

[0100] An evaluation module 50 for obtaining the transmission loss curve of the muffler.

[0101] Further, the generation module 40 includes:

[0102] A generation unit 41 for calculating the single variable parameter according to the muffler calculation formula and generating the optimal design parameter corresponding to the single variable parameter.

[0103] Further, the system further includes:

[0104] A modeling module 60 for establishing a digital model according to the optimal design parameter.

[0105] According to the above muffler design system, the engine parameters of the engine are pre-detected by the detection module, the intake pipe orifice noise of the intake system is predicted based on the engine parameters, the required muffler center frequency is determined according to the intake pipe orifice noise, the muffler size template that meets the intake system design space is selected by the acquisition module, and multiple design parameters in the muffler size template are extracted. The setting module sets the virtual environment conditions, inputs the muffler center frequency and multiple design parameters, and selects one of the multiple design parameters as the single variable parameter for testing. The generation module tests the single variable parameter according to the virtual environment conditions, generates the optimal design parameter corresponding to the single variable parameter, and designs and adjusts according to the required muffling frequency by means of inputting design structure parameters, greatly shortening the design and development cycle and cost of the intake system, and solving the technical problems of long development cycle and high cost in the muffler structure design in the prior art.

[0106] The present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the muffler design method as described above is implemented.

[0107] The present invention also provides a server, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the order processing method as described above is implemented.

[0108] In summary, for the server in the present invention, the engine parameters of the engine are pre-detected, the intake pipe orifice noise of the intake system is predicted based on the engine parameters, the required muffler center frequency is determined according to the intake pipe orifice noise, the muffler size template that meets the intake system design space is selected, and multiple design parameters in the muffler size template are extracted. Then the virtual environment conditions are set, the muffler center frequency and multiple design parameters are input, and one of the multiple design parameters is selected as the single variable parameter for testing. According to the virtual environment conditions, the single variable parameter is tested, the optimal design parameter corresponding to the single variable parameter is generated, and designs and adjusts according to the required muffling frequency by means of inputting design structure parameters, greatly shortening the design and development cycle and cost of the intake system, and solving the technical problems of long development cycle and high cost in the muffler structure design in the prior art.

[0109] Those skilled in the art will understand that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus or device), or used in combination with these instruction execution systems, apparatus or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus or device.

[0110] More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection part (electronic device) having one or more wirings, a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other suitable processing if necessary, and then stored in a computer memory.

[0111] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0112] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0113] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A muffler design method, characterized in that, Including: Detecting engine parameters of an engine, predicting the inlet pipe orifice noise of an initial intake system according to the engine parameters, and determining the required center frequency of a muffler according to the inlet pipe orifice noise; Obtaining a plurality of pre-stored muffler size templates, selecting a target muffler size template that meets the design space of the intake system, and extracting a plurality of design parameters from the target muffler size template; Setting a virtual environment condition, inputting the center frequency of the muffler and the plurality of design parameters, and selecting one of the plurality of design parameters as a single variable parameter for testing; Testing the single variable parameter according to the virtual environment condition to generate an optimal design parameter corresponding to the single variable parameter.

2. The muffler design method according to claim 1, characterized in that, The step of setting the virtual environment condition, inputting the center frequency of the muffler and the plurality of design parameters, and selecting one of the plurality of design parameters as a single variable parameter for testing specifically includes: Setting the speed of sound, inputting the center frequency of the muffler and extracting the inner diameter of the main pipe, the inner diameter of the cavity, the wall thickness, the length of the center pipe, the perforation diameter, and the number of perforations in the target muffler size template, and selecting one of the inner diameter of the main pipe, the inner diameter of the cavity, the wall thickness, the length of the center pipe, the perforation diameter, and the number of perforations as the single variable parameter.

3. The muffler design method according to claim 1, characterized in that The step of setting the virtual environment condition, inputting the center frequency of the muffler and the plurality of design parameters, and selecting one of the plurality of design parameters as a single variable parameter for testing specifically includes: Setting the speed of sound, inputting the center frequency of the muffler and extracting the diameter of the throat pipe, the length of the throat pipe, the diameter of the main pipe, and the volume of the resonance cavity in the target muffler size template, and selecting one of the diameter of the throat pipe, the length of the throat pipe, the diameter of the main pipe, and the volume of the resonance cavity as the single variable parameter.

4. The muffler design method according to claim 1, characterized in that, The step of setting the virtual environment condition, inputting the center frequency of the muffler and the plurality of design parameters, and selecting one of the plurality of design parameters as a single variable parameter for testing specifically includes: Setting the speed of sound and temperature, inputting the center frequency of the muffler and extracting the diameter of the main pipe, the diameter of the wavelength pipe, and the length of the wavelength pipe in the target muffler size template, and selecting one of the diameter of the main pipe, the diameter of the wavelength pipe, and the length of the wavelength pipe as the single variable parameter.

5. The muffler design method according to claim 1, characterized in that, The step of setting the virtual environment condition, inputting the center frequency of the muffler and the plurality of design parameters, and selecting one of the plurality of design parameters as a single variable parameter for testing specifically includes: Setting the speed of sound and temperature, inputting the center frequency of the muffler and extracting the inlet and outlet diameter, the cavity diameter, and the cavity length in the target muffler size template, and selecting one of the inlet and outlet diameter, the cavity diameter, and the cavity length as the single variable parameter.

6. The muffler design method according to claim 1, wherein After the step of testing the single variable parameter according to the virtual environment condition to generate an optimal design parameter corresponding to the single variable parameter, the method further includes: Obtaining the transmission loss curve of the muffler.

7. The muffler design method according to claim 1, characterized in that, The step of testing the single variable parameter according to the virtual environment working condition and generating the optimal design parameter corresponding to the single variable parameter specifically includes: Calculating the single variable parameter according to the muffler calculation formula and generating the optimal design parameter corresponding to the single variable parameter.

8. The muffler design method according to claim 1, wherein After the step of testing the single variable parameter according to the virtual environment working condition and generating the optimal design parameter corresponding to the single variable parameter, the method further includes: Establishing a digital model according to the optimal design parameter.

9. A silencer design system, characterized in that, The muffler design system adopts the method described in any one of claims 1-8, and the system includes: A detection module, configured to detect the engine parameters of the engine, predict the intake pipe port noise of the initial intake system according to the engine parameters, and determine the required muffler center frequency according to the intake pipe port noise; An acquisition module, configured to acquire a plurality of pre-stored muffler size templates, select a target muffler size template that meets the intake system design space therefrom, and extract a plurality of design parameters in the target muffler size template; A setting module, configured to set a virtual environment working condition, input the muffler center frequency and a plurality of the design parameters, and select one of the plurality of design parameters as a single variable parameter for testing; A generation module, configured to test the single variable parameter according to the virtual environment working condition and generate the optimal design parameter corresponding to the single variable parameter.

10. A computer storage medium, on which a computer program is stored, characterized in that, When the program is executed by a processor, it implements the method described in any one of claims 1 to 8.

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