Reliability Testing Method for Vehicle Exhaust Aftertreatment Device and Related Hardware

Abstract

An embodiment of the present invention provides a reliability test method and related hardware for a vehicle exhaust aftertreatment device, including: performing multiple temperature aging operations on the vehicle exhaust aftertreatment device based on the total number of temperature aging operations, and testing the reliability index of the vehicle exhaust aftertreatment device after determining that all temperature aging operations are completed; wherein each temperature aging operation performs the following process: blowing high-temperature air into the test tooling for a first preset duration and blowing low-temperature air into the test tooling for a second preset duration respectively; after the blowing of the high-temperature air and the low-temperature air is completed, if it is determined that the temperature of this temperature aging operation does not meet the requirements based on the target temperature value and the corresponding temperature index, a total number adjustment factor is determined based on the target temperature and the corresponding temperature index, and the total number of temperature aging operations is adjusted based on the total number adjustment factor.

Description

Technical Field

[0001] The present invention relates to the technical field of reliability testing, and particularly to a reliability testing method and related hardware for a vehicle exhaust after-treatment device. Background Art

[0002] The reliability of each structure in a vehicle is crucial for the service life of the vehicle. When performing a reliability test on a vehicle exhaust after-treatment device, for a temperature aging test, it is necessary to subject the tested vehicle exhaust after-treatment device to long-term thermal shock for aging. However, during the temperature aging process, the tested vehicle exhaust after-treatment device may not reach the expected cold / hot temperature state due to factors such as environmental temperature changes and unstable air flow temperature, resulting in the aging degree of the tested vehicle exhaust after-treatment device not reaching the expected aging degree after a fixed-duration temperature aging operation. After multiple temperature aging operations, the aging degree deviation will accumulate, making the conclusion of the reliability test inaccurate. Summary of the Invention

[0003] Embodiments of the present invention provide a reliability testing method and related hardware for a vehicle exhaust after-treatment device, aiming to solve the problem that the aging degree of the tested vehicle exhaust after-treatment device may not reach the expected effect during the existing temperature aging reliability test, resulting in inaccurate conclusions during the reliability test.

[0004] Embodiments of the present invention provide a reliability testing method for a vehicle exhaust after-treatment device, including:

[0005] Based on the total number of temperature aging operations, perform multiple temperature aging operations on the vehicle exhaust after-treatment device, and test the reliability index of the vehicle exhaust after-treatment device after determining that all temperature aging operations are completed; where each temperature aging operation performs the following process:

[0006] Blow high-temperature air into the test tooling for a first preset duration and blow low-temperature air into the test tooling for a second preset duration respectively;

[0007] After the high-temperature air blowing and low-temperature air blowing are completed, if it is determined that the temperature of this temperature aging operation does not meet the requirements based on the target temperature value and the corresponding temperature index, determine a total number adjustment factor based on the target temperature and the corresponding temperature index, and adjust the total number of temperature aging operations based on the total number adjustment factor;

[0008] Among them, if the target temperature is the target thermal shock temperature, the corresponding temperature index is the highest temperature of the specified object during the process of blowing high-temperature air into the test tooling; if the target temperature is the target cold shock temperature, the corresponding temperature index is the lowest temperature of the specified object during the process of blowing low-temperature air into the test tooling.

[0009] Optionally, the determination of the completion of all temperature aging operations includes:

[0010] After completing one temperature aging operation, if it is determined that the temperature of this temperature aging operation meets the requirements based on the target temperature value and the corresponding temperature index, and the number of temperature aging operations that have been performed is equal to the current total number of temperature aging operations, then it is determined that all temperature aging operations are completed.

[0011] Optionally, the temperature of this temperature aging operation is determined to meet the requirements in the following manner:

[0012] Judge whether the target thermal shock temperature is less than or equal to the corresponding temperature index, and whether the target cold shock temperature is greater than or equal to the corresponding temperature index;

[0013] If both are yes, it is determined that the temperature of this temperature aging operation meets the requirements;

[0014] Otherwise, it is determined that the temperature of this temperature aging operation does not meet the requirements.

[0015] Optionally, the total number adjustment factor is determined based on the target temperature and the corresponding temperature index, and the total number of temperature aging operations is adjusted based on the total number adjustment factor, including:

[0016] If the target thermal shock temperature is greater than the corresponding temperature index, and the target cold shock temperature is greater than or equal to the corresponding temperature index, then a first total number adjustment factor △ N1 is determined based on the target thermal shock temperature and the corresponding temperature index, and the current total number of temperature aging operations is increased by as the adjusted total number of temperature aging operations;

[0017] If the target thermal shock temperature is less than or equal to the corresponding temperature index, and the target cold shock temperature is less than the corresponding temperature index, then a second total number adjustment factor △N2 is determined based on the target cold shock temperature and the corresponding temperature index, and the current total number of temperature aging operations is increased by as the adjusted total number of temperature aging operations;

[0018] If the target thermal shock temperature is greater than the corresponding temperature index, and the target cold shock temperature is less than the corresponding temperature index, then determine the first total number adjustment factor △N1 based on the target thermal shock temperature and the corresponding temperature index, and determine the second total number adjustment factor △N2 based on the target cold shock temperature and the corresponding temperature index, and increase the current total number of temperature aging operations by as the adjusted total number of temperature aging operations.

[0019] Optionally, the first total number adjustment factor △N1 is calculated as follows:

[0020]

[0021] The second total number adjustment factor △N2 is calculated as follows:

[0022]

[0023] where T H is the target thermal shock temperature, T max is the temperature index corresponding to the target thermal shock temperature, T C is the target cold shock temperature, T min is the temperature index corresponding to the target cold shock temperature, and k is an exponent related to the material of the specified object.

[0024] Optionally, the specified object includes at least one of the following:

[0025] the vehicle exhaust aftertreatment device, the test tooling, and the airflow blown into the test tooling.

[0026] Optionally, before performing multiple temperature aging operations on the vehicle exhaust aftertreatment device, or after testing the reliability index of the vehicle exhaust aftertreatment device after determining that all temperature aging operations are completed, the method further includes:

[0027] Performing multiple vibration aging operations on the vehicle exhaust aftertreatment device, and testing the reliability index of the vehicle exhaust aftertreatment device after determining that all vibration aging operations are completed.

[0028] Based on the same inventive concept, an embodiment of the present invention further provides a test device, including:

[0029] A temperature aging reliability test module, configured to perform multiple temperature aging operations on the vehicle exhaust aftertreatment device based on the total number of temperature aging operations, and test the reliability index of the vehicle exhaust aftertreatment device after determining that all temperature aging operations are completed; where each temperature aging operation performs the following process:

[0030] Blow high-temperature air into the test tooling at a first preset duration respectively, and blow low-temperature air into the test tooling at a second preset duration;

[0031] After completing the blowing of high-temperature air and low-temperature air, if it is determined that the temperature of this temperature aging operation does not meet the requirements based on the target temperature value and the corresponding temperature index, then determine the total number adjustment factor based on the target temperature and the corresponding temperature index, and adjust the total number of times of the temperature aging operation based on the total number adjustment factor;

[0032] Wherein, if the target temperature is the target thermal shock temperature, the corresponding temperature index is the highest temperature of the specified object during the process of blowing high-temperature air into the test tooling; if the target temperature is the target cold shock temperature, the corresponding temperature index is the lowest temperature of the specified object during the process of blowing low-temperature air into the test tooling.

[0033] Based on the same inventive concept, an embodiment of the present invention further provides a test device, including: a processor and a memory for storing instructions executable by the processor;

[0034] Wherein, the processor is configured to execute the instructions to implement the reliability test method for the vehicle exhaust aftertreatment device described above.

[0035] Based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program is used to implement the reliability test method for the vehicle exhaust aftertreatment device.

[0036] The beneficial effects of the present invention are as follows:

[0037] The reliability test method and related hardware for the vehicle exhaust aftertreatment device provided by the embodiment of the present invention determine whether the tested vehicle exhaust aftertreatment device reaches the expected aging degree by judging the temperature of the specified object during each temperature aging test. If not, the number of temperature aging operations is increased, thereby compensating for the aging degree deviation caused by the unqualified temperature during the temperature aging operation and ensuring the accuracy of the conclusion drawn from the reliability test. Description of the Drawings

[0038] Figure 1 It is a schematic structural diagram of the vehicle exhaust aftertreatment device involved in the embodiment of the present invention;

[0039] Figure 2 It is a flowchart of the reliability test method for the vehicle exhaust aftertreatment device provided by the embodiment of the present invention;

[0040] Figure 3One of the structural schematic diagrams of the test tooling provided by the embodiments of the present invention;

[0041] Figure 4 Another structural schematic diagram of the test tooling provided by the embodiments of the present invention;

[0042] Figure 5 Structural schematic diagram of the reliability test device for the vehicle exhaust after-treatment device provided by the embodiments of the present invention;

[0043] Figure 6 Structural schematic diagram of the electronic device provided by the embodiments of the present invention. Detailed implementation manners

[0044] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described below in conjunction with the drawings and embodiments. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the figures denote the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing positions and directions described in the present invention are all illustrated by taking the drawings as examples, but can be changed according to needs, and all the changes made are included in the protection scope of the present invention. The drawings of the present invention are only used to illustrate the relative positional relationship and do not represent the true scale.

[0045] It should be noted that specific details are set forth in the following description to facilitate a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation manners disclosed below. The subsequent description in the specification is the preferred implementation manner for implementing the present application, but the description is for the purpose of illustrating the general principles of the present application and is not intended to limit the scope of the present application. The protection scope of the present application shall be defined by the appended claims.

[0046] The vehicle exhaust after-treatment device to be tested involved in the embodiments of the present invention may include, but is not limited to, a device for realizing the reduction of nitrogen oxides in vehicle exhaust to harmless nitrogen by means of a catalyst provided therein.

[0047] For example, as Figure 1As shown, the vehicle exhaust aftertreatment device can be a Selective Catalytic Reduction (SCR) device. The SCR device is mainly divided into three parts according to its functions: a control unit, a urea dosing unit, and a catalytic reaction unit 30. Among them, the urea dosing unit can be divided into an air-assisted injection system and a non-air-assisted injection system according to whether there is air-assisted injection. Figure 1 The non-air-assisted injection system is schematically shown in the figure. The control unit of the SCR system is integrated with the Electronic Control Unit (ECU) 10 of the engine, and is mainly used to execute the SCR control strategy, and control some structures of the urea dosing unit according to signals such as the ambient temperature, exhaust temperature (e.g., collected by the upstream temperature sensor 11), urea liquid level (e.g., collected by the urea liquid level sensor 22), urea temperature, urea pressure, nitrogen oxide concentration (e.g., collected by the nitrogen oxide sensor 12 and processed by the sensor controller 13), etc., and inject the urea solution into the exhaust gas flow regularly and quantitatively according to the demand. The urea dosing unit mainly includes a urea tank 21, a urea liquid level sensor 22, a urea supply unit 23, a urea injection unit 24, a heating component (e.g., Figure 1 the electric heating wire wound around the urea pipeline schematically shown in the figure) and connecting pipelines to ensure the full atomization and decomposition of the urea solution. The catalytic reaction unit 30 mainly includes an SCR catalyst and its encapsulation, and is used to reduce the main harmful component nitrogen oxides in the engine exhaust to nitrogen and water.

[0048] Specifically, the catalytic reaction unit 30 can be divided into three parts, namely an outer shell, a catalyst, and an emission control encapsulation gasket. The emission control encapsulation gasket is located between the shell and the catalyst and is a device for fixing the catalyst. During the normal use of the vehicle, after the emission control encapsulation gasket is used for a period of time, the mechanical properties will decline, and the original holding force provided for the carrier catalyst will decline, which is the aging phenomenon.

[0049] In order to accurately test the reliability of the structure of vehicle exhaust aftertreatment devices such as the catalytic reaction unit described above, the embodiments of the present invention provide a reliability test method for vehicle exhaust aftertreatment devices and related hardware to achieve accurate testing. The following will specifically describe the reliability test method for vehicle exhaust aftertreatment devices and related hardware provided by the embodiments of the present invention with reference to the accompanying drawings. It should be noted that the vehicle exhaust aftertreatment device mentioned below generally refers to some of its structures, and does not specifically refer to the structure of the complete vehicle exhaust aftertreatment device described above.

[0050] The embodiments of the present invention provide a reliability test method for vehicle exhaust aftertreatment devices, as Figure 2 shown, including:

[0051] S100. Determine the total number of temperature aging operations.

[0052] S200. Conduct 1 temperature aging operation on the vehicle exhaust aftertreatment device.

[0053] S300. Determine whether all temperature aging operations are completed.

[0054] If the result of step S300 is yes, execute step S400; if the result of step S300 is no, return to step S200.

[0055] S400. Test the reliability indicators of the vehicle exhaust aftertreatment device.

[0056] In the specific implementation process, the reliability indicators of the vehicle exhaust aftertreatment device may include, but are not limited to, indicators such as housing strength, housing hardness, device sealing performance, and housing corrosion degree, which are not limited herein.

[0057] Among them, step S200, conducting 1 temperature aging operation on the vehicle exhaust aftertreatment device, specifically includes:

[0058] S210. Blow high-temperature air into the test tooling for a first preset duration and blow low-temperature air into the test tooling for a second preset duration, respectively.

[0059] In the specific implementation process, the order of blowing high-temperature air and low-temperature air into the test tooling is not limited. It can blow high-temperature air first and then low-temperature air, or blow low-temperature air first and then high-temperature air, as long as it can achieve the alternating hot and cold impact of the air on the vehicle exhaust aftertreatment device. In the specific implementation process, it can be used Figure 3The shown test tooling 100 performs an aging operation on the vehicle exhaust aftertreatment device. When performing the temperature aging operation, the test tooling 100 includes a first housing 110, a second housing 120, and a third housing 130. The first housing 110 includes an air inlet 111 and a first connection structure 112. The air inlet 111 is used to receive the blown air flow, and the first connection structure 112 is used to fixedly and sealingly connect with the second housing 120. The second housing includes a second connection structure 121, a third connection structure, and a fourth connection structure. The second connection structure 121 is used to fixedly and sealingly connect with the first housing. The third connection structure is used to fixedly and sealingly connect with the third housing. The fourth connection structure is used to fix the vehicle exhaust aftertreatment device 200. The third housing includes an air outlet 131 and a fifth connection mechanism 132. The air outlet 131 is used to discharge the air flow blown into the test tooling, and the fifth connection structure 132 is used to fixedly and sealingly connect with the second housing 120. As an alternative implementation, the fourth connection structure and the third connection structure are a reused structure 122 (as Figure 2 shown), or the fourth connection structure and the second connection structure 121 are a reused structure; the first connection structure 111, the second connection structure 121, the third connection structure, the fourth connection structure, and the fifth connection structure 132 can all be flange plates (the vehicle exhaust aftertreatment device 200 also has a flange plate structure 201), and they are fixedly connected to each other using bolts.

[0060] By blowing high-temperature air flow into the test tooling, the internal structure and the external housing of the vehicle exhaust aftertreatment device can be heated simultaneously, simulating the internal air flow heating and external radiant heat during actual vehicle driving. Alternately performing thermal shock can cause the housing of the vehicle exhaust aftertreatment device to have dimensional changes due to temperature changes, achieving changes in the compression degree of the gasket.

[0061] After the high-temperature air flow blowing and the low-temperature air flow blowing are completed, S220, based on the target temperature value and the corresponding temperature index, determine whether the temperature of this temperature aging operation meets the requirements.

[0062] If the result of step S220 is yes, execute step S300.

[0063] If the result of step S220 is no, execute step S230.

[0064] S230, determine the total number adjustment factor based on the target temperature and the corresponding temperature index, and adjust the total number of times of the temperature aging operation based on the total number adjustment factor. Execute step S300.

[0065] Wherein, if the target temperature is the target thermal shock temperature, the corresponding temperature index is the highest temperature of a specified object during the process of blowing high-temperature air into the test tooling; if the target temperature is the target cold shock temperature, the corresponding temperature index is the lowest temperature of the specified object during the process of blowing low-temperature air into the test tooling.

[0066] During the aging test, the temperature of the vehicle exhaust aftertreatment device being tested may be affected by factors such as environmental temperature changes and unstable air flow temperature, and thus may not reach the expected cold / hot temperature state. As a result, after a temperature aging operation of a fixed duration, the aging degree of the vehicle exhaust aftertreatment device being tested does not reach the expected aging degree. After multiple temperature aging operations, the aging degree deviation will accumulate, making the conclusion inaccurate during the reliability test. In an embodiment of the present invention, it is determined whether the vehicle exhaust aftertreatment device being tested reaches the expected aging degree according to the temperature of the specified object during each temperature aging test. If not, the number of temperature aging operations is increased, thereby compensating for the aging degree deviation caused by the non-compliant temperature during the temperature aging operation and ensuring the accuracy of the conclusion obtained from the reliability test.

[0067] Further, determining whether all temperature aging operations are completed includes:

[0068] After completing a temperature aging operation, if it is determined that the temperature of this temperature aging operation meets the requirements based on the target temperature value and the corresponding temperature index, and the number of temperature aging operations that have been performed is equal to the current total number of temperature aging operations, it is determined that all temperature aging operations are completed; otherwise, it is determined that all temperature aging operations are not completed.

[0069] Specifically, S220. Judging whether the temperature of this temperature aging operation meets the requirements based on the target temperature value and the corresponding temperature index specifically includes:

[0070] Judging whether the target thermal shock temperature is less than or equal to the corresponding temperature index, and whether the target cold shock temperature is greater than or equal to the corresponding temperature index.

[0071] If both are yes, it is determined that the temperature of this temperature aging operation meets the requirements;

[0072] Otherwise, it is determined that the temperature of this temperature aging operation does not meet the requirements.

[0073] Specifically, the step S230. Determining the total number adjustment factor based on the target temperature and the corresponding temperature index, and adjusting the total number of temperature aging operations based on the total number adjustment factor includes:

[0074] If the target thermal shock temperature is greater than the corresponding temperature index, and the target cold shock temperature is greater than or equal to the corresponding temperature index, then determine the first total number adjustment factor △N1 based on the target thermal shock temperature and the corresponding temperature index, and increase the current total number of temperature aging operations by (i.e., round up △N1) as the adjusted total number of temperature aging operations;

[0075] If the target thermal shock temperature is less than or equal to the corresponding temperature index, and the target cold shock temperature is less than the corresponding temperature index, then determine the second total number adjustment factor △N2 based on the target cold shock temperature and the corresponding temperature index, and increase the current total number of temperature aging operations by (i.e., round up △N2) as the adjusted total number of temperature aging operations;

[0076] If the target thermal shock temperature is greater than the corresponding temperature index, and the target cold shock temperature is less than the corresponding temperature index, then determine the first total number adjustment factor △N1 based on the target thermal shock temperature and the corresponding temperature index and determine the second total number adjustment factor △N2 based on the target cold shock temperature and the corresponding temperature index, and increase the current total number of temperature aging operations by (i.e., round up △N1 + △ △N2) as the adjusted total number of temperature aging operations.

[0077] As an alternative implementation, the first total number adjustment factor △N1 and the second total number adjustment factor △N2 can be determined by referring to an empirical value table obtained through pre-tests.

[0078] As another alternative implementation, the first total number adjustment factor △N1 is calculated as follows:

[0079]

[0080] The second total number adjustment factor △N2 is calculated as follows:

[0081]

[0082] where T H is the target thermal shock temperature, T max is the temperature index corresponding to the target thermal shock temperature, T C is the target cold shock temperature, T min is the temperature index corresponding to the target cold shock temperature, and k is an index related to the material of the specified object.

[0083] Optionally, the specified object includes at least one of the following:

[0084] The vehicle exhaust aftertreatment device, the test tooling, and the airflow blown into the test tooling.

[0085] In a specific implementation process, if multiple specified objects are selected simultaneously, corresponding target temperature values, temperature indicators, and requirements can be set for each specified object respectively.

[0086] Further, before the step S100 or after the step S400 (not shown in the figure), the method further includes:

[0087] S510. Perform multiple vibration aging operations on the vehicle exhaust aftertreatment device.

[0088] S520. Test the reliability index of the vehicle exhaust aftertreatment device after determining that all vibration aging operations are completed.

[0089] In a specific implementation process, as Figure 4 shown, the test tooling 100 may further include a fourth housing 140, which replaces the aforementioned first housing 110 during the vibration aging operation. The fourth housing includes a sixth connection structure 141 and a seventh connection structure 142. The sixth connection structure 141 is used for fixedly connecting with the second housing, and the seventh connection structure 142 is used for fixedly connecting with the vibration test bench. The fourth housing transmits vibrations to the vehicle exhaust aftertreatment device during vibration aging. As an optional implementation manner, the sixth connection structure 141 may adopt a flange.

[0090] In this way, different aging operations can be completed by replacing the components of the test tooling.

[0091] Based on the same inventive concept, an embodiment of the present invention further provides a test device, as Figure 5 shown, including:

[0092] A temperature aging reliability test module M1, configured to perform multiple temperature aging operations on a vehicle exhaust aftertreatment device based on the total number of temperature aging operations, and test the reliability index of the vehicle exhaust aftertreatment device after determining that all temperature aging operations are completed; where each temperature aging operation performs the following process:

[0093] Blow high-temperature airflow into the test tooling for a first preset duration and blow low-temperature airflow into the test tooling for a second preset duration respectively;

[0094] After the high-temperature gas flow injection and the low-temperature gas flow injection are completed, if it is determined that the temperature of the current temperature aging operation does not meet the requirements based on the target temperature value and the corresponding temperature index, a total number adjustment factor is determined based on the target temperature and the corresponding temperature index, and the total number of times of the temperature aging operation is adjusted based on the total number adjustment factor;

[0095] Among them, if the target temperature is the target thermal shock temperature, the corresponding temperature index is the highest temperature of the specified object during the process of blowing high-temperature gas flow into the test tooling; if the target temperature is the target cold shock temperature, the corresponding temperature index is the lowest temperature of the specified object during the process of blowing low-temperature gas flow into the test tooling.

[0096] Optionally, the determination of the completion of all temperature aging operations includes:

[0097] After one temperature aging operation is completed, if it is determined that the temperature of the current temperature aging operation meets the requirements based on the target temperature value and the corresponding temperature index, and the number of temperature aging operations that have been performed is equal to the current total number of temperature aging operations, it is determined that all temperature aging operations are completed.

[0098] Optionally, the following method is used to determine whether the temperature of the current temperature aging operation meets the requirements:

[0099] Judge whether the target thermal shock temperature is less than or equal to the corresponding temperature index, and whether the target cold shock temperature is greater than or equal to the corresponding temperature index;

[0100] If both are yes, it is determined that the temperature of the current temperature aging operation meets the requirements;

[0101] Otherwise, it is determined that the temperature of the current temperature aging operation does not meet the requirements.

[0102] Optionally, the determination of the total number adjustment factor based on the target temperature and the corresponding temperature index, and the adjustment of the total number of times of the temperature aging operation based on the total number adjustment factor includes:

[0103] If the target thermal shock temperature is greater than the corresponding temperature index, and the target cold shock temperature is greater than or equal to the corresponding temperature index, a first total number adjustment factor △N1 is determined based on the target thermal shock temperature and the corresponding temperature index, and the current total number of times of the temperature aging operation is increased as the adjusted total number of times of the temperature aging operation;

[0104] If the target thermal shock temperature is less than or equal to the corresponding temperature index, and the target cold shock temperature is less than the corresponding temperature index, a second total number adjustment factor △N2 is determined based on the target cold shock temperature and the corresponding temperature index, and the current total number of times of the temperature aging operation is increased As the total number of temperature aging operations after adjustment;

[0105] If the target thermal shock temperature is greater than the corresponding temperature index and the target cold shock temperature is less than the corresponding temperature index, then determine the first total number adjustment factor N1 based on the target thermal shock temperature and the corresponding temperature index △ and determine the second total number adjustment factor N2 based on the target cold shock temperature and the corresponding temperature index, and increase the current total number of temperature aging operations by △ as the total number of temperature aging operations after adjustment.

[0106] Optionally, the first total number adjustment factor △ N1 is calculated in the following manner:

[0107]

[0108] The second total number adjustment factor △ N2 is calculated in the following manner:

[0109]

[0110] where T H is the target thermal shock temperature, T max is the temperature index corresponding to the target thermal shock temperature, T C is the target cold shock temperature, T min is the temperature index corresponding to the target cold shock temperature, and k is an exponent related to the material of the specified object.

[0111] Optionally, the specified object includes at least one of the following:

[0112] The vehicle exhaust after-treatment device, the test tooling, and the airflow blown into the test tooling.

[0113] Optionally, the device further includes:

[0114] A vibration aging reliability test module M2 for performing multiple vibration aging operations on the vehicle exhaust after-treatment device and testing the reliability index of the vehicle exhaust after-treatment device after determining that all vibration aging operations are completed.

[0115] ​It should be understood that the embodiments of the test device described above are merely illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Each functional module in the embodiment can be integrated in a processing module, or each module can exist physically alone, or two or more modules can be integrated in one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium.

[0116] Since the principle of the test device for solving problems is basically the same as that of the reliability test method for the vehicle exhaust after-treatment device, the implementation of the test device can refer to the implementation of the reliability test method for the vehicle exhaust after-treatment device, which will not be elaborated here.

[0117] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, as Figure 6 shown, including: a processor 1100 and a memory 1200 for storing executable instructions of the processor 1100; wherein, the processor 1100 is configured to execute the instructions to implement the reliability test method for the vehicle exhaust after-treatment device.

[0118] In the specific implementation process, the device may vary greatly due to configuration or performance differences, and may include one or more processors 1100, a memory 1200, and a computer-readable storage medium 1300. One or more application programs 1310 or data 1320 are included in the memory 1200 and / or the computer-readable storage medium 1300. One or more operating systems 1330, such as Windows, Mac OS, Linux, IOS, Android, Unix, FreeBSD, etc., may also be included in the memory 1200 and / or the computer-readable storage medium 1300. Among them, the memory 1200 and the computer-readable storage medium 1300 can be transient storage or persistent storage. The application program 1310 may include one or more of the above modules ( Figure 6 not shown in the figure), and each module may include a series of instruction operations. Further, the processor 1100 can be set to communicate with the computer-readable storage medium 1300 and execute a series of instruction operations in the storage medium 1300 on the device. The device may also include one or more power supplies ( Figure 6(not shown in the figure); one or more network interfaces 1400, where the network interface 1400 includes a wired network interface 1410 and / or a wireless network interface 1420; and one or more input / output interfaces 1430.

[0119] Based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium storing a computer program, and the computer program is used to implement the reliability test method for the vehicle exhaust aftertreatment device.

[0120] The reliability test method and related hardware for the vehicle exhaust aftertreatment device provided by the embodiment of the present invention determine whether the tested vehicle exhaust aftertreatment device reaches the expected aging degree by judging the temperature of a specified object during each temperature aging test. If not, the number of temperature aging operations is increased, thereby compensating for the aging degree deviation caused by the non-compliant temperature during the temperature aging operation and ensuring the accuracy of the conclusion drawn from the reliability test.

[0121] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0122] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 the functions specified in one block or multiple blocks.

[0123] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 the functions specified in one block or multiple blocks.

[0124] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are executed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions for implementing the steps of the function specified in one process or a plurality of processes and / or blocks Figure 1 one process or a plurality of processes and / or blocks Figure 1 in one block or a plurality of blocks.

[0125] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A reliability test method for a vehicle exhaust after-treatment device, characterized in that, Including: Based on the total number of temperature aging operations, perform multiple temperature aging operations on the vehicle exhaust aftertreatment device, and test the reliability index of the vehicle exhaust aftertreatment device after determining that all temperature aging operations are completed; each temperature aging operation performs the following process: Blow high-temperature air into the test tooling for a first preset duration and blow low-temperature air into the test tooling for a second preset duration, respectively; After the high-temperature air blowing and low-temperature air blowing are completed, if it is determined that the temperature of this temperature aging operation does not meet the requirements based on the target temperature value and the corresponding temperature index, determine the total number adjustment factor based on the target temperature and the corresponding temperature index, and adjust the total number of temperature aging operations based on the total number adjustment factor; where: If the target thermal shock temperature is greater than the corresponding temperature index, and the target cold shock temperature is greater than or equal to the corresponding temperature index, then determine a first total number adjustment factor based on the target thermal shock temperature and the corresponding temperature index △ N1, and increase the current total number of temperature aging operations by as the adjusted total number of temperature aging operations; If the target thermal shock temperature is less than or equal to the corresponding temperature index, and the target cold shock temperature is less than the corresponding temperature index, then determine a second total number adjustment factor based on the target cold shock temperature and the corresponding temperature index △ N2, and increase the current total number of temperature aging operations by this value as the adjusted total number of temperature aging operations; If the target thermal shock temperature is greater than the corresponding temperature index, and the target cold shock temperature is less than the corresponding temperature index, then determine the first total number adjustment factor △ N1 based on the target thermal shock temperature and the corresponding temperature index, and determine the second total number adjustment factor △ N2 based on the target cold shock temperature and the corresponding temperature index, and increase the current total number of temperature aging operations as the adjusted total number of temperature aging operations; Wherein, if the target temperature is the target thermal shock temperature, the corresponding temperature index is the highest temperature of the specified object during the process of blowing high-temperature air into the test tooling; if the target temperature is the target cold shock temperature, the corresponding temperature index is the lowest temperature of the specified object during the process of blowing low-temperature air into the test tooling.

2. The method according to claim 1, wherein The determination of the completion of all temperature aging operations includes: After a temperature aging operation is completed, if it is determined that the temperature of this temperature aging operation meets the requirements based on the target temperature value and the corresponding temperature index, and the number of temperature aging operations performed is equal to the current total number of temperature aging operations, it is determined that all temperature aging operations are completed.

3. The method according to claim 1 or 2, characterized in that, Judge whether the temperature of this temperature aging operation meets the requirements in the following way: Judge whether the target thermal shock temperature is less than or equal to the corresponding temperature index, and whether the target cold shock temperature is greater than or equal to the corresponding temperature index; If both are yes, it is determined that the temperature of this temperature aging operation meets the requirements; Otherwise, it is determined that the temperature of this temperature aging operation does not meet the requirements.

4. The method according to claim 1, wherein The first total number adjustment factor △ N1 is calculated as follows: The second total number adjustment factor △ N2 is calculated as follows: Among them, T H is the target thermal shock temperature, T max is the temperature index corresponding to the target thermal shock temperature, T C is the target cold shock temperature, T min is the temperature index corresponding to the target cold shock temperature, and k is an exponent related to the material of the specified object.

5. The method according to claim 1, wherein The specified object includes at least one of the following: The vehicle exhaust aftertreatment device, the test tooling, the air flow blown into the test tooling.

6. The method according to claim 1, wherein Before performing multiple temperature aging operations on the vehicle exhaust aftertreatment device, or after testing the reliability index of the vehicle exhaust aftertreatment device after determining that all temperature aging operations are completed, the method further includes: Perform multiple vibration aging operations on the vehicle exhaust aftertreatment device, and test the reliability index of the vehicle exhaust aftertreatment device after determining that all vibration aging operations are completed.

7. A testing device, characterized in that, The test device is used to implement the reliability test method of the vehicle exhaust aftertreatment device according to any one of claims 1-6; The test device includes: A temperature aging reliability test module, configured to perform multiple temperature aging operations on the vehicle exhaust aftertreatment device based on the total number of temperature aging operations, and test the reliability index of the vehicle exhaust aftertreatment device after determining that all temperature aging operations are completed; each temperature aging operation performs the following process: Blow high-temperature air into the test tooling for a first preset duration and blow low-temperature air into the test tooling for a second preset duration, respectively; After the high-temperature gas flow injection and the low-temperature gas flow injection are completed, if it is determined that the temperature of the current temperature aging operation does not meet the requirements based on the target temperature value and the corresponding temperature index, the total number adjustment factor is determined based on the target temperature and the corresponding temperature index, and the total number of times of the temperature aging operation is adjusted based on the total number adjustment factor; wherein: If the target thermal shock temperature is greater than the corresponding temperature index, and the target cold shock temperature is greater than or equal to the corresponding temperature index, then determine a first total number adjustment factor △N1 based on the target thermal shock temperature and the corresponding temperature index, and increase the current total number of temperature aging operation times by as the adjusted total number of temperature aging operation times; If the target thermal shock temperature is less than or equal to the corresponding temperature index, and the target cold shock temperature is less than the corresponding temperature index, then determine a second total number adjustment factor ΔN2 based on the target cold shock temperature and the corresponding temperature index, and increase the current total number of times of the temperature aging operation by as the adjusted total number of times of the temperature aging operation; If the target thermal shock temperature is greater than the corresponding temperature index, and the target cold shock temperature is less than the corresponding temperature index, then determine the first total number adjustment factor △N1 based on the target thermal shock temperature and the corresponding temperature index, and determine the second total number adjustment factor △N2 based on the target cold shock temperature and the corresponding temperature index, and increase the current total number of temperature aging operations by as the adjusted total number of temperature aging operations; Among them, if the target temperature is the target thermal shock temperature, the corresponding temperature index is the highest temperature of the specified object during the injection of the high-temperature gas flow into the test tooling; if the target temperature is the target cold shock temperature, the corresponding temperature index is the lowest temperature of the specified object during the injection of the low-temperature gas flow into the test tooling.

8. A testing device, characterized in that, Including: a processor and a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement the reliability test method of the vehicle exhaust after-treatment device according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and the computer program is used to implement the reliability test method of the vehicle exhaust after-treatment device according to any one of claims 1-6.

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