Automobile gas system air tightness analysis method, system and storage medium

Abstract

The present invention provides an automobile gas system air tightness analysis method, system and storage medium, belonging to the field of air tightness analysis, the method comprising: determining a to-be-tested model and a verification model of the gas system according to the structural parameters and material parameters of each component of the gas system; meshing the to-be-tested model and the verification model to determine the to-be-tested finite element analysis model and the verification finite element analysis model and importing boundary conditions; importing a variety of environmental simulation parameters respectively and performing simulations; obtaining the internal pressure parameters and external pressure parameters of the gas system under different environmental simulation parameters to determine the to-be-tested pressure parameters and the verification pressure parameters and determine that the ratio of the two under the same environmental simulation parameters is a first air tightness detection value; if all the first air tightness detection values ​​are within a first preset range, it is determined that the air tightness of the gas system meets the design requirements. The present invention solves the problem in the prior art of lacking a method for comprehensively and accurately evaluating the air tightness of automobile gas systems at a low cost.

Description

Technical Field

[0001] The present invention relates to the field of gas system air tightness analysis, and in particular to a method, system and storage medium for analyzing the air tightness of an automobile gas system. Background Art

[0002] Gas vehicles have the advantages of low cost and low environmental pollution, so most of the operating vehicles choose gas vehicles. Most of the existing gas vehicles are modified from fuel vehicles, usually gas and fuel dual-purpose vehicles. On the basis of basically maintaining the power performance of the original vehicle, the fuel economy is improved, and the automobile exhaust pollution is greatly reduced. In addition, the vehicle modification is simple and the use is safe and reliable.

[0003] Since gas vehicles use gas as fuel, the gas system of the gas vehicle itself has very high requirements for air tightness. Therefore, when designing, remanufacturing or manufacturing a gas vehicle, it is necessary to test the gas system of the gas vehicle for air tightness to ensure the normal use of the gas system in different environments. However, the existing gas vehicle gas system air tightness test requires the use of specific equipment to test the gas system in different environments after preparation. The specific equipment is expensive and requires stable gas storage and supply equipment. The use of such equipment requires certain professional and qualification requirements for the user. In addition, the optimization and rectification workload and cost after the gas system air tightness test are high. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a method, system and storage medium for analyzing the air tightness of an automobile gas system, aiming to solve the problem in the prior art of lacking a low-cost method that can comprehensively and accurately evaluate the air tightness of an automobile gas system.

[0005] According to an embodiment of the present invention, a method for analyzing air tightness of an automobile gas system comprises:

[0006] Acquire structural parameters and material parameters of each component of the gas system, and determine a to-be-tested model and a verification model of the gas system according to the structural parameters and material parameters;

[0007] Meshing the model to be tested and the verification model respectively according to the first mesh value, determining the finite element analysis model to be tested and the verification finite element analysis model, and importing the same boundary conditions;

[0008] Importing a plurality of environmental simulation parameters respectively, and performing simulations according to the environmental simulation parameters in a preset method respectively, wherein the environmental simulation parameters at least include an idle condition simulation parameter, an unstable condition simulation parameter, and a full load condition simulation parameter;

[0009] Acquire the internal pressure parameter and the external pressure parameter of the gas system under different environmental simulation parameters, thereby determining the pressure parameter to be measured and the verification pressure parameter, and determine the ratio of the pressure parameter to be measured and the verification pressure parameter under the same environmental simulation parameters as a first airtightness detection value;

[0010] If all of the first air tightness detection values ​​are within the first preset range, it is determined that the air tightness of the gas system meets the design requirements.

[0011] In addition, the automobile gas system air tightness analysis method according to the above embodiment of the present invention may also have the following additional technical features:

[0012] Furthermore, the step of determining the model to be tested and the verification model of the gas system according to the structural parameters and the material parameters includes:

[0013] Determine the part model corresponding to each component according to the structural parameters and material parameters;

[0014] According to the assembly relationship of the components, the part models are assembled and spliced ​​to determine the model to be tested;

[0015] The gaps between the components in the model to be tested are filled so that the components are combined with each other to form the verification model.

[0016] Further, after the step of determining the ratio of the pressure parameter to be measured and the verification pressure parameter under the same environmental simulation parameters as the first airtightness detection step, the following steps are included:

[0017] If any of the first air tightness detection values ​​is not within the first preset range, it is determined that the air tightness of the gas system does not meet the design requirements;

[0018] Determine the type of the environmental simulation parameter corresponding to the first airtightness detection value being outside the first preset range;

[0019] Determine a high-risk airtight leakage area according to the type of the environmental simulation parameter, and perform secondary grid division on the high-risk airtight leakage area corresponding to the finite element analysis model to be tested and the verification finite element analysis model, wherein the secondary grid division adopts a second grid value;

[0020] Importing the environmental simulation parameters to perform simulation to obtain the local pressure parameter to be measured and the local verification pressure parameter at the high-risk airtight leakage area, and determining the ratio of the local pressure parameter to be measured and the local verification pressure parameter at the same area as a second airtight detection value;

[0021] If any of the second airtightness detection values ​​is not within the second preset range, it is determined that the airtightness of the high-risk airtight leakage area corresponding to the second airtightness detection value not being within the second preset range does not meet the design requirements.

[0022] Further, if any one of the second airtight detection values ​​is not within the second preset range, the step of determining that the airtightness of the high-risk airtight leakage area corresponding to the second airtight detection value not within the second preset range does not meet the design requirements includes:

[0023] Identify leaking components at the high-risk airtight leakage area whose airtightness does not meet the design requirements;

[0024] Filling the gap between the leaking component and other components so that the components are combined with each other to form a calibration model;

[0025] Determine the correction pressure parameters corresponding to different environmental simulation parameters through simulation according to the correction model, and determine the ratio of the correction pressure parameter to the verification pressure parameter under the same environmental simulation parameters as a third airtightness detection value;

[0026] If all of the third air tightness detection values ​​are within the first preset range, it is determined that only the air tightness of the leaking component of the gas system does not meet the design requirements.

[0027] Further, after the step of determining the ratio of the local pressure parameter to be measured and the local verification pressure parameter at the same area as the second airtightness detection value, the following steps are included:

[0028] If all of the second airtightness detection values ​​are within the second preset range, it is determined that the airtightness at the high-risk airtight leakage area meets the design requirements;

[0029] Sequentially removing the fillings between the components of the verification model to determine a plurality of first screening models;

[0030] Determine the first troubleshooting pressure parameter corresponding to the different environmental simulation parameters through simulation according to the first troubleshooting model, and determine the ratio of the first troubleshooting pressure parameter to the verification pressure parameter under the same environmental simulation parameters as a fourth airtightness detection value;

[0031] The fourth air tightness detection value is compared with the first preset range to determine the first troubleshooting model corresponding to the fourth air tightness detection value not being within the first preset range, thereby determining the components in the gas system whose air tightness does not meet the design requirements.

[0032] Further, after the step of determining the ratio of the correction pressure parameter to the verification pressure parameter under the same environmental simulation parameters as the third airtightness detection value, the following steps are included:

[0033] If any of the third airtightness detection values ​​is not within the first preset range, it is determined that the airtightness of other areas except the high-risk airtight leakage area does not meet the design requirements;

[0034] Sequentially remove the fillings between the components of the verification model except the high-risk airtight leakage area to determine a plurality of second screening models;

[0035] Determine the second troubleshooting pressure parameter corresponding to the different environmental simulation parameters through simulation according to the second troubleshooting model, and determine the ratio of the second troubleshooting pressure parameter to the verification pressure parameter under the same environmental simulation parameters as a fifth airtightness detection value;

[0036] The fifth air tightness detection value is compared with the first preset range to determine the second troubleshooting model corresponding to the fifth air tightness detection value not being within the first preset range, thereby determining the components in the gas system whose air tightness does not meet the design requirements.

[0037] Another object of an embodiment of the present invention is to provide a system for analyzing the air tightness of an automobile gas system, the system comprising:

[0038] A solid model determination module, used to obtain structural parameters and material parameters of each component of the gas system, and determine a model to be tested and a verification model of the gas system according to the structural parameters and material parameters;

[0039] A finite element model determination module, used to perform grid division on the model to be tested and the verification model according to the first grid value, determine the finite element analysis model to be tested and the verification finite element analysis model, and import the same boundary conditions;

[0040] An environmental simulation module, used to import a plurality of environmental simulation parameters respectively, and perform simulations according to the environmental simulation parameters in a preset method respectively, wherein the environmental simulation parameters at least include an idle condition simulation parameter, an unstable condition simulation parameter and a full load condition simulation parameter;

[0041] An airtightness detection value determination module, used for obtaining the internal pressure parameter and the external pressure parameter of the gas system under different environmental simulation parameters, thereby determining the pressure parameter to be measured and the verification pressure parameter, and determining the ratio of the pressure parameter to be measured and the verification pressure parameter under the same environmental simulation parameters as the first airtightness detection value;

[0042] The judgment module is used to determine that the air tightness of the gas system meets the design requirements when all of the first air tightness detection values ​​are within a first preset range.

[0043] Another object of an embodiment of the present invention is to provide a storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the steps of the above-mentioned automobile gas system air tightness analysis method.

[0044] Another object of an embodiment of the present invention is to provide an electronic device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of the above-mentioned automobile gas system air tightness analysis method when executing the program.

[0045] The present invention obtains the structural parameters and material parameters of each component of the gas system, models the gas system, obtains the model to be tested, and then adjusts the model to be tested to obtain a verification model without airtightness problems. Then, the model to be tested and the verification model are simulated by a simulation method using the same environmental simulation parameters, and then the internal and external pressure parameters of the model to be tested and the verification model under different working conditions are determined. If there is an airtightness problem, the pressure parameters of the model to be tested and the pressure parameters of the verification model without airtightness problems under the same environmental simulation conditions are greatly different. Therefore, by comparing the ratio of the two with the first preset range, the airtightness of the gas system under different environmental simulation parameters can be accurately judged, and then the airtightness of the gas system can be accurately and comprehensively tested in the design stage, and then the components that do not meet the airtightness requirements can be improved, so as to avoid the situation where the gas system is scrapped due to airtightness not meeting the regulations after production, which greatly reduces the cost. In addition, no specific detection equipment is required for simulation detection, and it is not affected by the qualifications required for the gas charging and gas supply equipment, which greatly reduces the cost and threshold of the airtightness detection of the automobile gas system. Therefore, the present invention solves the problem in the prior art that there is a lack of a method for comprehensively and accurately evaluating the air tightness of an automobile gas system at a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a flow chart of a method for analyzing gas tightness of an automobile gas system in one embodiment of the present invention;

[0047] Figure 2 is a structural block diagram of an automobile gas system air tightness analysis system in one embodiment of the present invention;

[0048] Figure 3 is a schematic structural diagram of an electronic device in an embodiment of the present invention;

[0049] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0050] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0051] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0053] Embodiment 1

[0054] See also Figure 1 , which is a flow chart of a method for analyzing the air tightness of an automobile gas system in Embodiment 1 of the present invention. The method specifically includes steps S01 to S05.

[0055] S01, obtaining structural parameters and material parameters of various components of a gas system, and determining a to-be-tested model and a verification model of the gas system according to the structural parameters and material parameters.

[0056] Specifically, the step of determining the model to be tested and the verification model of the gas system according to the structural parameters and material parameters includes: determining the part models corresponding to each component according to the structural parameters and material parameters; assembling and splicing the part models according to the assembly relationship of the components to determine the model to be tested; filling the gaps between the components in the model to be tested so that the components are combined with each other to form the verification model. The problem of air tightness of the gas system is usually caused by the assembly gaps at the connection of each component. And under high temperature and high pressure conditions, there are differences in the physical properties between different components, resulting in gaps, which affects the air tightness of the gas system. Then, by filling the gaps between the components and combining them, the components are connected as one, but the outer contour and the internal cavity structure shape remain unchanged, a verification model can be obtained that has no air tightness problems and the other overall structures are basically consistent with the model to be tested.

[0057] S02, meshing the model to be tested and the verification model according to the first mesh value, determining the finite element analysis model to be tested and the verification finite element analysis model, and introducing the same boundary conditions.

[0058] Specifically, the model to be tested and the verification model are slightly roughly meshed by using the same first grid value, and the same boundary conditions are adopted to ensure the consistency of external factors, thereby reducing the impact of external factors and providing accuracy in airtightness analysis. There is no need for precise meshing, which greatly reduces the amount of calculation and improves analysis efficiency.

[0059] S03, importing a plurality of environmental simulation parameters respectively, and performing simulations according to the environmental simulation parameters in accordance with a preset method respectively, wherein the environmental simulation parameters at least include an idle condition simulation parameter, an unstable condition simulation parameter and a full load condition simulation parameter.

[0060] Specifically, by setting a plurality of different environmental conditions for airtightness simulation, it can be ensured that the airtightness of the gas system under various working conditions meets the design requirements, thereby ensuring the reliability of the gas system of the vehicle. In addition, the environmental simulation parameters can also include simulation parameters for starting conditions, simulation parameters for medium load conditions, and simulation parameters for different conditions under different external environmental conditions, such as high temperature environment, rainy environment, and severe cold environment.

[0061] S04, obtaining the internal pressure parameter and the external pressure parameter of the gas system under different environmental simulation parameters, thereby determining the pressure parameter to be measured and the verification pressure parameter, and determining the ratio of the pressure parameter to be measured and the verification pressure parameter under the same environmental simulation parameters as the first airtightness detection value.

[0062] Specifically, when the gas system operates under different operating conditions and external environments, gases with different parameters such as pressure, temperature and gas volume will be introduced, which will in turn affect the internal pressure of the gas system. Under different airtight conditions, even under the same conditions, the external pressure and internal pressure of the gas system will change, and the change in external pressure is particularly significant. Therefore, the airtightness of the gas system can be judged by comparing the internal pressure parameters and external pressure parameters of the model to be tested and the verification model. In addition, it should be noted that during the initial operation under different operating conditions and within a certain period of time at the end of the operation, the changes in the pressure parameters of the gas system are irregular. Therefore, when making comparisons, it is necessary to reasonably select the pressure parameters to be tested and the verification pressure parameters with the same time period for comparison and judgment.

[0063] S05: If all of the first air tightness detection values ​​are within a first preset range, it is determined that the air tightness of the gas system meets the design requirements.

[0064] Specifically, the degree of pressure difference between the model to be tested and the verification model under the same working conditions is judged, so as to determine whether there is an airtightness problem in the gas system corresponding to the model to be tested, and by reasonably setting the first preset range, the influence of system errors on the airtightness judgment can be avoided.

[0065] In addition, after determining the ratio of the pressure parameter to be measured and the verification pressure parameter under the same environmental simulation parameters as the first airtightness detection step, the following steps are included:

[0066] If any one of the first air-tightness detection values ​​is not within the first preset range, it is determined that the air-tightness of the gas system does not meet the design requirements; determine the type of the environmental simulation parameter corresponding to the first air-tightness detection value not being within the first preset range; determine the high-risk air-tight leakage area according to the type of the environmental simulation parameter, and perform secondary grid division on the high-risk air-tight leakage area corresponding to the finite element analysis model to be tested and the verification finite element analysis model, and the secondary grid division uses the second grid value; import the environmental simulation parameters for simulation to obtain the local pressure parameter to be tested and the local verification pressure parameter at the high-risk air-tight leakage area, and determine that the ratio of the local pressure parameter to be tested and the local verification pressure parameter at the same area is the second air-tightness detection value; if any one of the second air-tightness detection values ​​is not within the second preset range, it is determined that the air-tightness of the high-risk air-tight leakage area corresponding to the second air-tightness detection value not being within the second preset range does not meet the design requirements.

[0067] Determine the leaking components in the high-risk airtight leakage area whose airtightness does not meet the design requirements; fill the gaps between the leaking components and other components so that the components are combined with each other to form a correction model; determine the corresponding correction pressure parameters under different environmental simulation parameters through simulation according to the correction model, and determine the ratio of the correction pressure parameter to the verification pressure parameter under the same environmental simulation parameters as a third airtight detection value; if all the third airtight detection values ​​are within the first preset range, it is determined that only the leaking component of the gas system does not meet the design requirements in terms of airtightness.

[0068] Specifically, when it is determined that the gas system has an airtightness problem, it is also necessary to determine the specific components or areas with the airtightness problem so that the gas system can be adjusted. There are areas in the gas system where the airtightness is relatively weak, and the relatively weak areas are different depending on the external environment and working conditions. Therefore, the relatively weak areas can be determined by the corresponding environmental simulation parameter type when the airtightness is unqualified, and then the relatively weak areas can be more precisely meshed and simulated to judge the airtightness of the weak areas. Since only some areas are precisely meshed and airtight judgments are made, the amount of computing processing is greatly reduced and the processing efficiency is improved. In addition, usually the airtightness problem occurs in the relatively weak area, so the area is checked first, which effectively improves the troubleshooting efficiency. After identifying the leaking component, the entire system needs to be reviewed to avoid airtightness problems in other areas. Therefore, after filling and combining the gaps in the model of the leaking component so that the leaking component no longer has airtightness problems, return to the previous execution steps, simulate the entire gas system after treatment, and compare it with the simulation data of the previously calibrated model to determine whether there are still airtightness problems.

[0069] In addition, after the step of determining that the ratio of the local pressure parameter to be measured and the local verification pressure parameter in the same area is the second air tightness detection value, it includes: if all the second air tightness detection values ​​are within the second preset range, it is determined that the air tightness at the high-risk airtight leakage area meets the design requirements; remove the filling between the various components of the verification model in turn to determine multiple first troubleshooting models; determine the first troubleshooting pressure parameters corresponding to different environmental simulation parameters through simulation according to the first troubleshooting model, and determine that the ratio of the first troubleshooting pressure parameter to the verification pressure parameter under the same environmental simulation parameters is the fourth air tightness detection value; compare the fourth air tightness detection value with the first preset range to determine the first troubleshooting model corresponding to the fourth air tightness detection value that is not within the first preset range, thereby determining the components in the gas system whose air tightness does not meet the design requirements.

[0070] In addition, after the step of determining that the ratio of the correction pressure parameter to the verification pressure parameter under the same environmental simulation parameters is the third airtightness detection value, the step includes: if any one of the third airtightness detection values ​​is not within the first preset range, it is determined that the airtightness of other areas except the high-risk airtight leakage area does not meet the design requirements; the fillings between the various components of the verification model except the high-risk airtight leakage area are removed in turn to determine multiple second troubleshooting models; according to the second troubleshooting model, the corresponding second troubleshooting pressure parameters under different environmental simulation parameters are determined through simulation, and the ratio of the second troubleshooting pressure parameter to the verification pressure parameter under the same environmental simulation parameters is determined to be the fifth airtightness detection value; the fifth airtightness detection value is compared with the first preset range to determine the second troubleshooting model corresponding to the fifth airtightness detection value not being within the first preset range, thereby determining the components in the gas system whose airtightness does not meet the design requirements.

[0071] Specifically, in a few cases, there are still airtightness problems in parts outside the high-risk airtight leakage area. Therefore, it is necessary to adjust the verification model, determine the troubleshooting model by removing the gap filling between the components, and then simulate the troubleshooting model to perform airtightness troubleshooting between the components and areas.

[0072] In summary, the automobile gas system airtightness analysis method in the above embodiment of the present invention obtains the structural parameters and material parameters of each component of the gas system, models the gas system, obtains the model to be tested, and then adjusts the model to be tested to obtain a verification model without airtightness problems. After that, the model to be tested and the verification model are simulated by a simulation method using the same environmental simulation parameters, and then the internal and external pressure parameters of the model to be tested and the verification model under different working conditions are determined. If there is an airtightness problem, the pressure parameters of the model to be tested and the pressure parameters of the verification model without airtightness problems are compared under the same environmental simulation conditions. There is a large difference, so by comparing the ratio of the two with the first preset range, the airtightness of the gas system under different environmental simulation parameters can be accurately judged, and then the airtightness of the gas system can be accurately and comprehensively tested in the design stage, and then the components that do not meet the airtightness requirements can be improved, thereby avoiding the gas system being scrapped due to airtightness not meeting regulations after production, greatly reducing costs. In addition, no specific testing equipment is required for simulation testing, and it is not affected by the qualifications required for gas charging and gas supply equipment, which greatly reduces the cost and threshold of automobile gas system airtightness testing. Therefore, the present invention solves the problem of the lack of a low-cost method in the prior art that can comprehensively and accurately evaluate the airtightness of automobile gas systems.

[0073] Embodiment 2

[0074] See also Figure 2 , which is a structural block diagram of the automobile gas system air tightness analysis system proposed in the second embodiment of the present invention, the automobile gas system air tightness analysis system 200 includes: a solid model determination module 210, a finite element model determination module 220, an environmental simulation module 230, an air tightness detection value determination module 240 and a judgment module 250, wherein:

[0075] The entity model determination module 210 is used to obtain the structural parameters and material parameters of each component of the gas system, and determine the to-be-tested model and the verification model of the gas system according to the structural parameters and material parameters;

[0076] The finite element model determination module 220 is used to perform grid division on the model to be tested and the verification model according to the first grid value, determine the finite element analysis model to be tested and the verification finite element analysis model, and import the same boundary conditions;

[0077] The environment simulation module 230 is used to import a plurality of environment simulation parameters respectively, and perform simulation according to the environment simulation parameters in a preset method respectively, wherein the environment simulation parameters at least include an idle condition simulation parameter, an unstable condition simulation parameter and a full load condition simulation parameter;

[0078] The airtightness detection value determination module 240 is used to obtain the internal pressure parameter and the external pressure parameter of the gas system under different environmental simulation parameters, so as to determine the pressure parameter to be measured and the verification pressure parameter, and determine the ratio of the pressure parameter to be measured and the verification pressure parameter under the same environmental simulation parameters as the first airtightness detection value;

[0079] The judgment module 250 is used to determine that the air tightness of the gas system meets the design requirements when all of the first air tightness detection values ​​are within a first preset range.

[0080] Furthermore, the entity model determination module 210 includes:

[0081] A part model determination unit, used to determine the part model corresponding to each component according to the structural parameters and material parameters;

[0082] A unit for determining a model to be tested, used for assembling and splicing the part models to determine the model to be tested according to the assembly relationship of the parts;

[0083] The verification model determination unit is used to fill the gaps between the components in the model to be tested so that the components are combined with each other to form the verification model.

[0084] Furthermore, the automobile gas system air tightness analysis system 200 also includes:

[0085] A first comparison module, configured to determine that the air tightness of the gas system does not meet the design requirements when any of the first air tightness detection values ​​is not within the first preset range;

[0086] An environmental simulation parameter type determination module, used to determine the type of the environmental simulation parameter corresponding to the first airtightness detection value being outside the first preset range;

[0087] A secondary grid division module, used for determining a high-risk airtight leakage area according to the type of the environmental simulation parameter, and performing secondary grid division on the high-risk airtight leakage area corresponding to the finite element analysis model to be tested and the verification finite element analysis model, wherein the secondary grid division adopts a second grid value;

[0088] A second airtight detection value determination module is used to import the environmental simulation parameters for simulation to obtain the local pressure parameter to be measured and the local verification pressure parameter at the high-risk airtight leakage area, and determine the ratio of the local pressure parameter to be measured and the local verification pressure parameter at the same area as the second airtight detection value;

[0089] The second comparison module is used to determine that the airtightness of the high-risk airtight leakage area corresponding to the second airtightness detection value not within the second preset range does not meet the design requirements when any of the second airtightness detection values ​​is not within the second preset range.

[0090] Furthermore, the automobile gas system air tightness analysis system 200 also includes:

[0091] A leaking component determination module, used to determine leaking components in the high-risk airtight leakage area whose airtightness does not meet the design requirements;

[0092] A correction model determination module, used to fill the gap between the leaking component and other components so that the components are combined with each other to form a correction model;

[0093] A third airtightness detection value determination module is used to determine the corresponding correction pressure parameters under different environmental simulation parameters through simulation according to the correction model, and determine the ratio of the correction pressure parameter to the verification pressure parameter under the same environmental simulation parameters as a third airtightness detection value;

[0094] The fourth comparison module is used to determine that the air tightness of only the leaking component of the gas system does not meet the design requirements when all of the third air tightness detection values ​​are within the first preset range.

[0095] Furthermore, the automobile gas system air tightness analysis system 200 also includes:

[0096] a fifth comparison module, configured to determine that the air tightness of the high-risk air tightness leakage area meets the design requirements when all of the second air tightness detection values ​​are within a second preset range;

[0097] A first screening model determination module, used to sequentially remove the padding between the components of the verification model to determine a plurality of first screening models;

[0098] a fourth airtightness detection value determination module, configured to determine the first inspection pressure parameter corresponding to the different environmental simulation parameters through simulation according to the first inspection model, and determine the ratio of the first inspection pressure parameter to the verification pressure parameter under the same environmental simulation parameters as a fourth airtightness detection value;

[0099] The first component troubleshooting module is used to compare the fourth air tightness detection value with the first preset range to determine the first troubleshooting model corresponding to the fourth air tightness detection value not being within the first preset range, thereby determining the components in the gas system whose air tightness does not meet the design requirements.

[0100] Furthermore, the automobile gas system air tightness analysis system 200 also includes:

[0101] A sixth comparison module, configured to determine that the air tightness of other areas except the high-risk air tight leakage area does not meet the design requirements when any of the third air tightness detection values ​​is not within the first preset range;

[0102] A second screening model determination module is used to sequentially remove the fillings between the various components of the verification model except the high-risk airtight leakage area to determine a plurality of second screening models;

[0103] a fifth airtightness detection value determination module, configured to determine the second inspection pressure parameters corresponding to the different environmental simulation parameters through simulation according to the second inspection model, and determine the ratio of the second inspection pressure parameter to the verification pressure parameter under the same environmental simulation parameters as the fifth airtightness detection value;

[0104] The second component troubleshooting module is used to compare the fifth air tightness detection value with the first preset range to determine the second troubleshooting model corresponding to the fifth air tightness detection value not being within the first preset range, thereby determining the components in the gas system whose air tightness does not meet the design requirements.

[0105] The functions or operation steps implemented when the above modules are executed are substantially the same as those in the above method embodiments, and will not be repeated here.

[0106] Embodiment 3

[0107] Another aspect of the present invention provides an electronic device, see Figure 3 , shown is a schematic diagram of an electronic device in Embodiment 3 of the present invention, including a memory 20, a processor 10, and a computer program 30 stored in the memory and running on the processor. When the processor 10 executes the computer program 30, the above-mentioned automobile gas system air tightness analysis method is implemented.

[0108] In some embodiments, the processor 10 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor or other data processing chip, used to run program codes or process data stored in the memory 20, such as executing access restriction programs.

[0109] Among them, the memory 20 includes at least one type of readable storage medium, and the readable storage medium includes a flash memory, a hard disk, a multimedia card, a card-type memory (for example, an SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, etc. In some embodiments, the memory 20 can be an internal storage unit of an electronic device, such as a hard disk of the electronic device. In other embodiments, the memory 20 can also be an external storage device of an electronic device, such as a plug-in hard disk equipped on the electronic device, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), etc. Further, the memory 20 can also include both an internal storage unit of the electronic device and an external storage device. The memory 20 can not only be used to store application software and various types of data of the electronic device, but also can be used to temporarily store data that has been output or is to be output.

[0110] It should be pointed out that Figure 3 The structure shown does not constitute a limitation on the electronic device. In other embodiments, the electronic device may include fewer or more components than those shown in the figure, or combine certain components, or arrange the components differently.

[0111] The embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned automobile gas system air tightness analysis method is implemented.

[0112] Those skilled in the art will appreciate that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For purposes of this specification, "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0113] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0114] 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-mentioned 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, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0115] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0116] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A method for analyzing the air tightness of an automobile gas system, characterized in that: The method comprises: Acquire structural parameters and material parameters of each component of the gas system, and determine a to-be-tested model and a verification model of the gas system according to the structural parameters and material parameters; Meshing the model to be tested and the verification model respectively according to the first mesh value, determining the finite element analysis model to be tested and the verification finite element analysis model, and importing the same boundary conditions; Importing a plurality of environmental simulation parameters respectively, and performing simulations according to the environmental simulation parameters in a preset method respectively, wherein the environmental simulation parameters at least include an idle condition simulation parameter, an unstable condition simulation parameter, and a full load condition simulation parameter; Acquire the internal pressure parameter and the external pressure parameter of the gas system under different environmental simulation parameters, thereby determining the pressure parameter to be measured and the verification pressure parameter, and determine the ratio of the pressure parameter to be measured and the verification pressure parameter under the same environmental simulation parameters as a first airtightness detection value; If all of the first air tightness detection values ​​are within the first preset range, it is determined that the air tightness of the gas system meets the design requirements; The step of determining the model to be tested and the verification model of the gas system according to the structural parameters and the material parameters comprises: Determine the part model corresponding to each component according to the structural parameters and material parameters; According to the assembly relationship of the components, the part models are assembled and spliced ​​to determine the model to be tested; The gaps between the components in the model to be tested are filled so that the components are combined with each other to form the verification model.

2. The automobile gas system air tightness analysis method according to claim 1, characterized in that: After the step of determining the ratio of the pressure parameter to be measured and the verification pressure parameter under the same environmental simulation parameters as the first airtightness test, the method further comprises: If any of the first air tightness detection values ​​is not within the first preset range, it is determined that the air tightness of the gas system does not meet the design requirements; Determine the type of the environmental simulation parameter corresponding to the first airtightness detection value being outside the first preset range; Determine a high-risk airtight leakage area according to the type of the environmental simulation parameter, and perform secondary grid division on the high-risk airtight leakage area corresponding to the finite element analysis model to be tested and the verification finite element analysis model, wherein the secondary grid division adopts a second grid value; Importing the environmental simulation parameters to perform simulation to obtain the local pressure parameter to be measured and the local verification pressure parameter at the high-risk airtight leakage area, and determining the ratio of the local pressure parameter to be measured and the local verification pressure parameter at the same area as a second airtight detection value; If any of the second airtightness detection values ​​is not within the second preset range, it is determined that the airtightness of the high-risk airtight leakage area corresponding to the second airtightness detection value not being within the second preset range does not meet the design requirements.

3. The automobile gas system air tightness analysis method according to claim 2, characterized in that: If any of the second airtight detection values ​​is not within the second preset range, the step of determining that the airtightness of the high-risk airtight leakage area corresponding to the second airtight detection value not within the second preset range does not meet the design requirements includes: Identify leaking components at the high-risk airtight leakage area whose airtightness does not meet the design requirements; Filling the gap between the leaking component and other components so that the components are combined with each other to form a calibration model; Determine the correction pressure parameters corresponding to different environmental simulation parameters through simulation according to the correction model, and determine the ratio of the correction pressure parameter to the verification pressure parameter under the same environmental simulation parameters as a third airtightness detection value; If all of the third air tightness detection values ​​are within the first preset range, it is determined that only the air tightness of the leaking component of the gas system does not meet the design requirements.

4. The automobile gas system air tightness analysis method according to claim 2, characterized in that: After the step of determining the ratio of the local pressure parameter to be measured and the local verification pressure parameter at the same area as the second airtightness detection value, the following steps are included: If all of the second airtightness detection values ​​are within the second preset range, it is determined that the airtightness at the high-risk airtight leakage area meets the design requirements; Sequentially removing the fillings between the components of the verification model to determine a plurality of first screening models; Determine the first troubleshooting pressure parameter corresponding to the different environmental simulation parameters through simulation according to the first troubleshooting model, and determine the ratio of the first troubleshooting pressure parameter to the verification pressure parameter under the same environmental simulation parameters as a fourth airtightness detection value; The fourth air tightness detection value is compared with the first preset range to determine the first troubleshooting model corresponding to the fourth air tightness detection value not being within the first preset range, thereby determining the components in the gas system whose air tightness does not meet the design requirements.

5. The automobile gas system air tightness analysis method according to claim 3, characterized in that: After the step of determining the ratio of the correction pressure parameter to the verification pressure parameter under the same environmental simulation parameters as a third airtightness detection value, the following steps are included: If any of the third airtightness detection values ​​is not within the first preset range, it is determined that the airtightness of other areas except the high-risk airtight leakage area does not meet the design requirements; Sequentially remove the fillings between the components of the verification model except the high-risk airtight leakage area to determine a plurality of second screening models; Determine the second troubleshooting pressure parameter corresponding to the different environmental simulation parameters through simulation according to the second troubleshooting model, and determine the ratio of the second troubleshooting pressure parameter to the verification pressure parameter under the same environmental simulation parameters as a fifth airtightness detection value; The fifth air tightness detection value is compared with the first preset range to determine the second troubleshooting model corresponding to the fifth air tightness detection value not being within the first preset range, thereby determining the components in the gas system whose air tightness does not meet the design requirements.

6. An automobile gas system air tightness analysis system, characterized in that: Used to implement the automobile gas system air tightness analysis method according to any one of claims 1 to 5, the system comprises: A solid model determination module, used to obtain structural parameters and material parameters of each component of the gas system, and determine the model to be tested and the verification model of the gas system according to the structural parameters and material parameters; A finite element model determination module, used to perform grid division on the model to be tested and the verification model according to the first grid value, determine the finite element analysis model to be tested and the verification finite element analysis model, and import the same boundary conditions; An environmental simulation module, used to import a plurality of environmental simulation parameters respectively, and perform simulations according to the environmental simulation parameters in a preset method respectively, wherein the environmental simulation parameters at least include an idle condition simulation parameter, an unstable condition simulation parameter and a full load condition simulation parameter; An airtightness detection value determination module, used for obtaining the internal pressure parameter and the external pressure parameter of the gas system under different environmental simulation parameters, thereby determining the pressure parameter to be measured and the verification pressure parameter, and determining the ratio of the pressure parameter to be measured and the verification pressure parameter under the same environmental simulation parameters as the first airtightness detection value; The judgment module is used to determine that the air tightness of the gas system meets the design requirements when all of the first air tightness detection values ​​are within a first preset range.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the automobile gas system air tightness analysis method as claimed in any one of claims 1 to 5 are implemented.

8. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and running on the processor, wherein when the processor executes the program, the automobile gas system air tightness analysis method as claimed in any one of claims 1 to 5 is implemented.

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