Parking endurance test method

Abstract

The invention discloses a parking endurance test method, and relates to the technical field of automobile system tests.The parking endurance test method comprises the steps that parking endurance tests are conducted on all vehicles, firstly, the tire system performance and the suspension system performance of all the tested vehicles are analyzed, and then all the unqualified tested vehicles are obtained; tyres and suspension systems of all unqualified vehicles are improved to ensure that all test vehicles meet safety regulations, the safety of all the test vehicles is effectively improved, then vehicle performance of all the qualified test vehicles is analyzed, performance change conditions of all the qualified test vehicles are obtained through performance change curves of all the qualified test vehicles, and the safety of all the test vehicles is improved. According to the parking endurance test method and device, all the qualified test vehicles can be adjusted and optimized in time, the problem that the performance loss of all the qualified test vehicles in the parking endurance test is too large is solved to the maximum extent, the stability and completeness of parking systems of all the test vehicles are guaranteed, and therefore the use requirements of different users are met.

Description

Technical Field

[0001] The present application relates to the technical field of automobile system testing, and in particular to a parking endurance test method. Background Art

[0002] With the continuous development of society and technology, users are paying more and more attention to the performance and safety of automobiles. Through parking durability tests, the performance changes of various systems of the vehicle under long-term parking conditions can be analyzed to ensure the safety of the vehicle during subsequent driving. Therefore, this application proposes a parking durability test method.

[0003] Prior art, such as a parking durability test method disclosed in the invention application patent with announcement number: CN117928969A. This application includes: S1, obtaining the user's parking slope probability distribution data; S2, obtaining the relationship between the user's parking slope interval A and the user's parking probability y through the user's parking slope probability distribution; S3, obtaining the number of test parkings E corresponding to each test parking slope A interval through the relationship between the user's parking slope A interval and the user's parking probability y; S4, performing test parking, and testing the corresponding number of test parkings E under different test parking slope A intervals. In this solution, the parking durability test method is tested by setting up steps S1, S2, S3 and S4 to simulate the actual durability of real users to the greatest extent; compared with the prior art, this parking durability test method has the advantages of simple operation, convenient operation and high reliability.

[0004] For the above scheme, there are at least the following technical problems: 1. The current technology mainly analyzes the relationship between the parking slope and the user's parking situation. It lacks analysis of the specific impact of long-term parking on the performance of each test vehicle, and thus cannot discover potential problems and specific fault systems, thereby unable to ensure the safety of each test vehicle during driving after parking.

[0005] 2. The current technology does not take into account the impact of different road materials on the test vehicles when the user is parking, nor does it take into account the performance changes of the test vehicles after long-term parking. As a result, it is impossible to optimize and adjust the test vehicles, let alone improve the production quality of the test vehicles, which will lead to a decline in the market competitiveness of this type of test vehicles and the loss of customers. Summary of the invention

[0006] The purpose of this application is to provide a parking durability test method to solve the problems existing in the background technology.

[0007] In order to solve the above technical problems, the present application adopts the following technical solutions: The present application provides a parking endurance test method, including: Step 1: Data collection: Perform a parking endurance test on each vehicle, and collect various basic parameters of each test vehicle.

[0008] Step 2, data analysis: Based on the collected basic parameters of each test vehicle, the tire system performance evaluation coefficient and the suspension system performance evaluation coefficient of each test vehicle are analyzed to obtain each qualified test vehicle and each unqualified test vehicle, and then the performance evaluation coefficient of each qualified test vehicle is analyzed again, and the performance evaluation coefficient of each qualified test vehicle is fitted into a vehicle performance change curve, so as to analyze the impact on each qualified test vehicle.

[0009] Step 3: Adjustment and optimization: Adjust and optimize each test vehicle based on the test results of the parking endurance test.

[0010] Preferably, the basic parameters of each test vehicle include tire wear area, tire internal air pressure and tire braking parameter value; and also include vehicle body vibration frequency and suspension system stiffness value during braking.

[0011] Preferably, the parking endurance test is performed on the vehicle, and the specific test process is as follows: A1. A road surface with the same slope paved with a specified material is set in the test cabin, and each test vehicle is placed in the test cabin. When all equipment is normally connected, the test begins, and the parking time is gradually increased with the same time variable. After the parking is completed, the tire wear area and tire internal air pressure of each test vehicle at each parking time are collected.

[0012] A2. After parking, place each test vehicle on a smooth road surface with the same material and no slope, drive the same distance at the same speed, and then brake each test vehicle. Collect the braking time and braking distance from the start of braking to complete stop, as well as the body vibration frequency of each test vehicle during driving.

[0013] A3. After the braking operation is completed, apply the same thrust to each test vehicle, and collect the thrust and the displacement distance of each test vehicle under the thrust. After the collection is completed, the test is terminated.

[0014] Preferably, the performance evaluation coefficient of each qualified test vehicle is fitted into a vehicle performance change curve, and the specific fitting process is as follows: the parking time of each qualified test vehicle is obtained as the horizontal coordinate, and the performance evaluation coefficient of each qualified test vehicle is obtained as the vertical coordinate, a two-dimensional coordinate system is established, and the vehicle performance evaluation coefficient corresponding to each parking time of each qualified test vehicle is marked with coordinate points on the coordinate system, and then the coordinate points are connected to obtain the performance evaluation coefficient change curve of each qualified test vehicle.

[0015] Preferably, the performance evaluation coefficient of each qualified test vehicle is fitted into a vehicle performance change curve, and the specific fitting process is as follows: the parking time of each qualified test vehicle is used as the horizontal coordinate, and the performance evaluation coefficient of each qualified test vehicle is used as the vertical coordinate, a two-dimensional coordinate system is established, and the vehicle performance evaluation coefficient corresponding to each parking time of each qualified test vehicle is marked with coordinate points on the coordinate system, and then the coordinate points are connected to obtain the vehicle performance evaluation coefficient change curve of each qualified test vehicle.

[0016] The beneficial effects of the present application are: 1. A parking durability test method provided by the present application, by performing a parking durability test on each vehicle, firstly analyzes the tire system performance and suspension system performance of each test vehicle, and then obtains each unqualified test vehicle, and improves the tire and suspension system of each unqualified vehicle to ensure that each test vehicle complies with safety regulations, effectively improving the safety of each test vehicle, and then analyzes the vehicle performance of each qualified test vehicle, and obtains the performance change of each qualified test vehicle through the performance change curve of each qualified test vehicle, so as to facilitate timely adjustment and optimization of each qualified test vehicle, and avoid the problem of excessive performance loss of each qualified test vehicle in the parking durability test to the greatest extent, so as to ensure the stability and perfection of the parking system of each test vehicle, thereby meeting the usage needs of different users.

[0017] 2. This application analyzes the tire system performance and suspension system performance of each test vehicle when parked, and obtains the tire and suspension system wear of each test vehicle after a long period of parking on roads of various materials, and then makes timely optimization adjustments to unqualified test vehicles to ensure that the vehicles comply with safety regulations, thereby effectively improving the safety and reliability of each test vehicle, and is also beneficial for manufacturers to improve product design and material selection.

[0018] 3. This application analyzes the vehicle performance change trends of each test vehicle after the parking endurance test, thereby effectively identifying potential problems, predicting the vehicle performance loss of each test vehicle in advance, and greatly avoiding the risks caused by excessive parking time.

[0019] 4. This application ensures the stability and perfection of the parking systems of each test vehicle by adjusting and optimizing the test vehicles after the parking endurance test, while also bringing a better user experience to users. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The present invention is a flowchart of the steps for implementing the present application method. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] Reference Figure 1 As shown, the present application provides a parking endurance test method, comprising the following steps: Step 1: Data collection: performing a parking endurance test on each vehicle, and collecting various basic parameters of each test vehicle.

[0024] It should be noted that each test vehicle is a vehicle of different models selected by the test personnel themselves.

[0025] In a specific example, the basic parameters of each test vehicle include tire wear area, tire internal air pressure and tire braking parameter value; and also include vehicle body vibration frequency and suspension system stiffness value during braking.

[0026] It should be noted that the present application aims to analyze the performance of various systems of a vehicle after long-term parking. The basic parameters collected of each test vehicle are the basic parameters of any system, which may be the basic parameters of the tire system, the basic parameters of the suspension system, or the basic parameters of the engine system. Therefore, it cannot be understood as a limitation to the present application.

[0027] It should be noted that the tire wear area of ​​each test vehicle is the total wear area of ​​the four tires; the internal air pressure of the tires of each test vehicle is the total internal air pressure of the four tires.

[0028] In a specific example, the parking endurance test is performed on the vehicle, and the specific test process is as follows: A1. A road surface with the same slope paved with specified materials is set in the test chamber, and each test vehicle is placed in the test chamber. When all equipment is connected normally, the test begins, and the parking time is gradually increased with the same time variable. After the parking is completed, the tire wear area and tire internal pressure of each test vehicle at each parking time are collected.

[0029] A2. After parking, place each test vehicle on a smooth road surface with the same material and no slope, drive the same distance at the same speed, and then brake each test vehicle. Collect the braking time and braking distance from the start of braking to complete stop, as well as the body vibration frequency of each test vehicle during driving.

[0030] A3. After the braking operation is completed, apply the same thrust to each test vehicle, and collect the thrust and the displacement distance of each test vehicle under the thrust. After the collection is completed, the test is terminated.

[0031] It should be noted that the test chamber is set to a constant temperature and humidity environment, for example, the temperature is 30°C and the humidity is 95%RH.

[0032] It should be noted that the road surfaces with the same slope paved with specified materials include smooth road surfaces, cobblestone roads, salt water roads, railroad roads, asphalt roads or water-bound macadam roads.

[0033] It should be noted that the parking time is gradually increased with the same time variable, wherein the same time variable is set by the user, such as one hour, one day or half a month.

[0034] It should be noted that the braking operation is that the test personnel fully depress the brake pedal to bring each test vehicle to a stationary state.

[0035] It should be noted that the thrust applied to each test vehicle has the same direction and magnitude and is greater than the gravity of all test vehicles, so that each test vehicle can be displaced a certain distance under the action of the thrust.

[0036] In a specific example, the collecting of basic parameters of each test vehicle specifically includes: using a tire wear measuring instrument to collect tire wear areas of each test vehicle.

[0037] An electronic tire pressure gauge was used to collect the internal air pressure of the tires of each test vehicle.

[0038] The braking time and braking distance of each test vehicle are collected using a time recorder and a displacement sensor, and the ratio of the braking time and braking distance is recorded as the braking parameter value of the tire.

[0039] The thrust sensor and displacement sensor are used to respectively collect the thrust applied to each test vehicle and the displacement distance of each test vehicle under the thrust, and the ratio of the thrust to the displacement distance of each test vehicle is recorded as the suspension system stiffness value of each test vehicle.

[0040] Step 2, data analysis: Based on the collected basic parameters of each test vehicle, the tire system performance evaluation coefficient and the suspension system performance evaluation coefficient of each test vehicle are analyzed to obtain each qualified test vehicle and each unqualified test vehicle, and then the performance evaluation coefficient of each qualified test vehicle is analyzed again, and the performance evaluation coefficient of each qualified test vehicle is fitted into a vehicle performance change curve, so as to analyze the impact on each qualified test vehicle.

[0041] In a specific example, the tire system performance evaluation coefficient and suspension system performance evaluation coefficient of each test vehicle are analyzed based on the collected basic parameters of each test vehicle. The specific analysis process is as follows: the wear area, internal tire pressure, braking time and braking distance of each test vehicle tire collected during braking operation are recorded as , , and , is the model number of each test vehicle, , is the number corresponding to each parking time. , according to the calculation formula: Get the tire system performance evaluation coefficient of each test vehicle ,in , and They are respectively represented by the standard values ​​of tire wear area, tire internal pressure and tire braking parameters of the test vehicles in the database. , and They are respectively represented as the weight factor corresponding to the tire wear area of ​​the test vehicle in the database, the weight factor corresponding to the internal air pressure of the tire, and the weight factor corresponding to the tire braking parameter.

[0042] The collected vibration frequency of the vehicle body during braking, the thrust applied to each test vehicle, and the displacement distance of each test vehicle under the thrust are recorded as , and , according to the calculation formula: Get the suspension system performance evaluation coefficient of each test vehicle ,in and They are respectively represented by the standard value of vehicle body vibration frequency and suspension system stiffness during vehicle braking in the database. and They are respectively represented as the weight factor corresponding to the body vibration frequency during vehicle braking and the weight factor corresponding to the suspension system stiffness value in the database.

[0043] It should be noted that the standard value of tire wear area of ​​the test vehicles in the database is the average value of the tire wear area of ​​each test vehicle after the parking endurance test on a smooth and flat road surface after removing the maximum and minimum values; the standard value of internal tire pressure is the average value of the internal tire pressure of each test vehicle after the parking endurance test on a smooth and flat road surface after removing the maximum and minimum values; the standard value of tire braking parameter is the average value of the tire braking parameter of each test vehicle after the parking endurance test on a smooth and flat road surface after removing the maximum and minimum values.

[0044] It should be noted that the standard value of the vehicle body vibration frequency during vehicle braking in the database is the average value of the vehicle body vibration frequency obtained after the parking endurance test on a smooth and flat road for each test vehicle, after removing the maximum and minimum values; the standard value of the suspension system stiffness is the average value of the suspension system stiffness after the parking endurance test on a smooth and flat road for each test vehicle, after removing the maximum and minimum values.

[0045] It should be noted that , , , ; , , .

[0046] It should be noted that the weight factors corresponding to the tire wear area of ​​each test vehicle, the weight factors corresponding to the tire internal pressure, and the weight factors corresponding to the tire braking parameters are obtained through factor analysis. First, the information of the tire wear area, tire internal pressure, and tire braking parameters of each test vehicle is condensed, and then the variance explanation rate after rotation is obtained, and the weight is obtained by dividing the cumulative variance explanation rate.

[0047] It should be noted that the method for setting the weight factor corresponding to the body vibration frequency of the vehicle in the database and the weight factor corresponding to the suspension system stiffness value is as shown above, so it will not be repeated here.

[0048] It should be noted that factor analysis is a well-known technology. It is a multivariate statistical analysis method that starts from studying the internal dependencies of variables and reduces some variables with intricate relationships to a few comprehensive factors; information concentration is expressed as calculating the median; the variance explanation rate is the amount of information extracted by the factor, and the variance explanation rate = characteristic root / total number of analysis items; the variance explanation rate after rotation is expressed as the variance explanation rate of the factor after maximum variance rotation.

[0049] In a specific example, the qualified test vehicles and unqualified test vehicles are obtained by comparing the tire system performance evaluation coefficient of each test vehicle with the tire system performance evaluation coefficient threshold of the test vehicles in the database. When the tire system performance evaluation coefficient of a test vehicle is greater than the tire system performance evaluation coefficient threshold of the test vehicle in the database, the test vehicle is recorded as a test vehicle with unqualified tire system performance, otherwise it is recorded as a test vehicle with qualified tire system performance.

[0050] The suspension system performance evaluation coefficient of each test vehicle is compared with the suspension system performance evaluation coefficient threshold of the test vehicles in the database. When the suspension system performance evaluation coefficient of a test vehicle is greater than the suspension system performance evaluation coefficient threshold of the test vehicles in the database, the vehicle is recorded as a test vehicle with unqualified suspension system performance; otherwise, it is recorded as a test vehicle with qualified suspension system performance.

[0051] Each test vehicle with unqualified tire system performance and unqualified suspension system performance is recorded as an unqualified test vehicle, and each test vehicle with qualified tire system performance and qualified suspension system performance is recorded as a qualified test vehicle.

[0052] It should be noted that the tire system performance evaluation coefficient threshold of the test vehicle in the database is the maximum value of the tire system performance evaluation coefficient obtained after the parking endurance test of each test vehicle on a smooth and non-slope road surface.

[0053] It should be noted that the threshold value of the suspension system performance evaluation coefficient of the test vehicle in the database is the maximum value of the tire evaluation coefficient obtained after the parking endurance test of each test vehicle on a smooth and non-slope road surface.

[0054] In a specific example, the analysis obtains the performance evaluation coefficient of each qualified test vehicle. The specific analysis process is as follows: the tire system performance evaluation coefficient of each qualified test vehicle is obtained and suspension system performance evaluation coefficient Substitute into the calculation formula Get the performance evaluation coefficient of each qualified test vehicle ,in and They are respectively represented as the weight factor corresponding to the tire system performance evaluation coefficient and the weight factor corresponding to the suspension system performance evaluation coefficient of the vehicle in the database.

[0055] It should be noted that , , .

[0056] It should be noted that the weight factors corresponding to the tire system performance evaluation coefficients and the suspension system performance evaluation coefficients of each test vehicle are obtained by factor analysis. First, the information of the tire system performance evaluation coefficients and the suspension system performance evaluation coefficients of each test vehicle is condensed, and then the variance explanation rate after rotation is obtained, and the weight is obtained by dividing the cumulative variance explanation rate.

[0057] In a specific example, the performance evaluation coefficient of each qualified test vehicle is fitted into a vehicle performance change curve, and the specific fitting process is as follows: the parking time of each qualified test vehicle is used as the horizontal coordinate, and the performance evaluation coefficient of each qualified test vehicle is used as the vertical coordinate to establish a two-dimensional coordinate system, and the vehicle performance evaluation coefficient corresponding to each parking time of each qualified test vehicle is marked on the coordinate system. The coordinate points are then connected to obtain the vehicle performance evaluation coefficient change curve of each qualified test vehicle.

[0058] In a specific example, the analysis of the impact on each qualified test vehicle is as follows: obtaining the endpoint slope of the performance change curve of each qualified test vehicle , the endpoint slope of each first-level test vehicle performance change curve The slope threshold of the test vehicle performance change in the database For comparison, when the endpoint slope of a certain level of qualified test vehicle When the performance change of the test vehicle is analyzed as normal wear and tear, the performance of the test vehicle is not affected by the road material, and the test vehicle is recorded as an unaffected vehicle; otherwise, the performance of the test vehicle is analyzed as being affected by the road material, and the test vehicle is recorded as an affected vehicle.

[0059] It should be noted that .

[0060] It should be noted that the test vehicle performance change slope threshold in the database is the minimum slope of the performance change curve of each test vehicle obtained after the test vehicle performs a parking endurance test on a smooth and non-slope road surface.

[0061] It should be noted that the database includes the standard values ​​of the tire wear area, the standard values ​​of the internal tire pressure and the standard values ​​of the tire braking parameters of the test vehicle; it also includes the weight factors corresponding to the tire wear area, the weight factors corresponding to the internal tire pressure and the weight factors corresponding to the tire braking parameters of the test vehicle; it includes the standard values ​​of the body vibration frequency and the standard values ​​of the suspension system stiffness of the test vehicle when braking; it also includes the weight factors corresponding to the body vibration frequency and the weight factors corresponding to the suspension system stiffness values ​​of the vehicle when braking; it also includes the test vehicle's tire system performance evaluation coefficient threshold value and the test vehicle's suspension system performance evaluation coefficient threshold value; it also includes the weight factors corresponding to the vehicle's tire system performance evaluation coefficient and the weight factors corresponding to the suspension system performance evaluation coefficient; it also includes the performance change slope threshold value of the test vehicle.

[0062] Step 3: Adjustment and optimization: Adjust and optimize each test vehicle based on the test results of the parking endurance test.

[0063] In a specific example, the adjusting and optimizing each test vehicle specifically includes: adjusting and optimizing the tire and suspension system of each unqualified test vehicle.

[0064] Adjust and optimize the tires of test vehicles whose tire system performance fails.

[0065] Adjust and optimize the suspension systems of test vehicles whose suspension system performance fails the test.

[0066] The tires and suspension systems of each affected vehicle have been adjusted and optimized, and risk warnings have been issued to users who purchase this model of vehicle.

[0067] It should be noted that adjustment and optimization include redesigning the tires or suspension systems and replacing the manufacturing materials to reduce the vehicle performance loss caused by parking.

[0068] The present application provides a parking durability test method, which performs a parking durability test on each vehicle, first analyzes the tire system performance and suspension system performance of each test vehicle, and then obtains each unqualified test vehicle, improves the tire and suspension system of each unqualified vehicle to ensure that each test vehicle complies with safety regulations, effectively improving the safety of each test vehicle, and then analyzes the vehicle performance of each qualified test vehicle, and obtains the performance change of each qualified test vehicle through the performance change curve of each qualified test vehicle, so as to facilitate timely adjustment and optimization of each qualified test vehicle, and avoid the problem of excessive performance loss of each qualified test vehicle in the parking durability test to the greatest extent, so as to ensure the stability and perfection of the parking system of each test vehicle, thereby meeting the usage needs of different users.

[0069] The above contents are merely examples and explanations of the concept of the present application. The technicians in this technical field may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined in the present application, they should all fall within the protection scope of the present application.

Claims

1. A parking endurance test method, characterized in that: include: Step 1: Data collection: Carry out parking endurance test on each vehicle and collect various basic parameters of each test vehicle; Step 2, data analysis: According to the collected basic parameters of each test vehicle, the tire system performance evaluation coefficient and the suspension system performance evaluation coefficient of each test vehicle are analyzed to obtain each qualified test vehicle and each unqualified test vehicle, and then the performance evaluation coefficient of each qualified test vehicle is analyzed again, and the performance evaluation coefficient of each qualified test vehicle is fitted into a vehicle performance change curve, so as to analyze the impact on each qualified test vehicle; Step 3: Adjustment and optimization: Adjust and optimize each test vehicle based on the test results of the parking endurance test.

2. A parking endurance test method according to claim 1, characterized in that: The basic parameters of each test vehicle include tire wear area, tire internal air pressure and tire braking parameter value; and also include vehicle body vibration frequency during braking and suspension system stiffness value.

3. A parking endurance test method according to claim 2, characterized in that: The parking endurance test of the vehicle is carried out, and the specific test process is as follows: A1. Set up a road surface with the same slope made of specified materials in the test chamber, place each test vehicle in the test chamber, start the test after all equipment is connected normally, gradually increase the parking time with the same time variable, and after the parking is completed, collect the tire wear area and tire internal pressure of each test vehicle at each parking time; A2. After parking, place each test vehicle on a smooth road with the same material and no slope, and brake each test vehicle after driving the same distance at the same speed. Collect the braking time and braking distance of each test vehicle from the start of braking to complete stop, as well as the body vibration frequency of each test vehicle during driving; A3. After the braking operation is completed, apply the same thrust to each test vehicle, and collect the thrust and the displacement distance of each test vehicle under the thrust. After the collection is completed, the test is terminated.

4. A parking endurance test method according to claim 3, characterized in that: The basic parameters of each test vehicle are collected as follows: Use a tire wear measuring instrument to collect the tire wear area of ​​each test vehicle; Use an electronic tire pressure gauge to collect the internal air pressure of the tires of each test vehicle; The braking time and braking distance of each test vehicle are collected using a time recorder and a displacement sensor, and the ratio of the braking time and braking distance is recorded as the braking parameter value of the tire; The thrust sensor and displacement sensor are used to respectively collect the thrust applied to each test vehicle and the displacement distance of each test vehicle under the thrust, and the ratio of the thrust to the displacement distance of each test vehicle is recorded as the suspension system stiffness value of each test vehicle.

5. A parking endurance test method according to claim 4, characterized in that: According to the collected basic parameters of each test vehicle, the tire system performance evaluation coefficient and the suspension system performance evaluation coefficient of each test vehicle are analyzed and obtained. The specific analysis process is as follows: The collected wear area of ​​each test vehicle tire, tire internal pressure, tire braking time and braking distance during braking operation are recorded as , , and , is the model number of each test vehicle, , is the number corresponding to each parking time. , according to the calculation formula: Get the tire system performance evaluation coefficient of each test vehicle ,in , and They are respectively represented by the standard values ​​of tire wear area, tire internal pressure and tire braking parameters of the test vehicles in the database. , and They are respectively represented as the weight factor corresponding to the tire wear area of ​​the test vehicle in the database, the weight factor corresponding to the tire internal air pressure, and the weight factor corresponding to the tire braking parameter; The collected vibration frequency of the vehicle body during braking, the thrust applied to each test vehicle, and the displacement distance of each test vehicle under the thrust are recorded as , and , according to the calculation formula: Get the suspension system performance evaluation coefficient of each test vehicle ,in and They are respectively represented by the standard value of vehicle body vibration frequency and suspension system stiffness during vehicle braking in the database. and They are respectively represented as the weight factor corresponding to the body vibration frequency when the vehicle brakes and the weight factor corresponding to the suspension system stiffness value in the database.

6. A parking endurance test method according to claim 5, characterized in that: The specific process of obtaining each qualified test vehicle and each unqualified test vehicle is as follows: Compare the tire system performance evaluation coefficient of each test vehicle with the tire system performance evaluation coefficient threshold of the test vehicle in the database. When the tire system performance evaluation coefficient of a test vehicle is greater than the tire system performance evaluation coefficient threshold of the test vehicle in the database, the test vehicle is recorded as a test vehicle with unqualified tire system performance, otherwise it is recorded as a test vehicle with qualified tire system performance; The suspension system performance evaluation coefficient of each test vehicle is compared with the suspension system performance evaluation coefficient threshold of the test vehicle in the database. When the suspension system performance evaluation coefficient of a test vehicle is greater than the suspension system performance evaluation coefficient threshold of the test vehicle in the database, the vehicle is recorded as a test vehicle with unqualified suspension system performance, otherwise it is recorded as a test vehicle with qualified suspension system performance; Each test vehicle with unqualified tire system performance and unqualified suspension system performance is recorded as an unqualified test vehicle, and each test vehicle with qualified tire system performance and qualified suspension system performance is recorded as a qualified test vehicle.

7. A parking endurance test method according to claim 6, characterized in that: The analysis results in the performance evaluation coefficients of each qualified test vehicle. The specific analysis process is as follows: The tire system performance evaluation coefficient of each qualified test vehicle and suspension system performance evaluation coefficient Substitute into the calculation formula Get the performance evaluation coefficient of each qualified test vehicle ,in and They are respectively represented as the weight factor corresponding to the tire system performance evaluation coefficient and the weight factor corresponding to the suspension system performance evaluation coefficient of the vehicle in the database.

8. A parking endurance test method according to claim 7, characterized in that: The performance evaluation coefficients of each qualified test vehicle are fitted into a vehicle performance change curve, and the specific fitting process is as follows: A two-dimensional coordinate system is established by taking the parking time of each qualified test vehicle as the horizontal coordinate and the performance evaluation coefficient of each qualified test vehicle as the vertical coordinate. The vehicle performance evaluation coefficient corresponding to each parking time of each qualified test vehicle is marked with coordinate points on the coordinate system, and then the coordinate points are connected to obtain the vehicle performance evaluation coefficient change curve of each qualified test vehicle.

9. A parking endurance test method according to claim 8, characterized in that: The analysis of the impact on each qualified test vehicle is as follows: Obtain the endpoint slope of each qualified test vehicle performance change curve , the endpoint slope of each first-level test vehicle performance change curve The slope threshold of the test vehicle performance change in the database For comparison, when the endpoint slope of a certain level of qualified test vehicle When the performance change of the test vehicle is analyzed as normal wear and tear, the performance of the test vehicle is not affected by the road material, and the test vehicle is recorded as an unaffected vehicle; otherwise, the performance of the test vehicle is analyzed as being affected by the road material, and the test vehicle is recorded as an affected vehicle.

10. A parking endurance test method according to claim 9, characterized in that: The adjustment and optimization of each test vehicle is specifically as follows: Adjust and optimize the tires and suspension systems of all unqualified test vehicles; Adjust and optimize the tires of vehicles with unqualified tire system performance tests; Adjust and optimize the suspension systems of vehicles with unqualified suspension system performance tests; The tires and suspension systems of each affected vehicle have been adjusted and optimized, and risk warnings have been issued to users who purchase this model of vehicle.

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