A tire real vehicle impact boss test method

Abstract

The application discloses a kind of tire real vehicle impact boss test methods, tire real vehicle impact boss test methods include: A1.on test vehicle installation speed measuring instrument;A2.on test road installation brake barrier;A3.check again and mark;A4.in the impact speed greater than or equal to 20km / h, less than or equal to 60km / h range selection value;A5.vehicles travel to distance brake barrier, travel speed reaches specified impact speed;A6.after each impact, stop greater than or equal to 3 minutes;A7.the same model tire test is carried out in the same workday;A8.after test, tire appearance inspection, whether there is bulge or cracking in tire side or bead;A9.test conclusion;A10.form test report.It is diversified to realize vehicle tire impact test, to improve the accuracy of vehicle tire anti-impact performance evaluation result, so as to accurately determine the performance of vehicle tire anti-impact.

Description

Technical Field

[0001] This invention belongs to the field of tire impact protrusion technology, and particularly relates to a tire impact protrusion test method. Background Technology

[0002] Current tire testing methods are limited and cannot effectively assess tire impact resistance, leading to inaccurate evaluations of tire impact performance. Therefore, it is essential to develop an effective method for real-world tire impact testing. Summary of the Invention

[0003] The purpose of this invention is to address the problem that the current testing methods for vehicle tires are too simplistic and cannot effectively test the impact resistance of vehicle tires, resulting in inaccurate evaluation of the impact resistance performance of vehicle tires. In response to the above problems, this invention proposes a method for testing tire impact protrusions on actual vehicles.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for testing tire impact protrusions on actual vehicles, the method comprising:

[0006] Experimental conditions:

[0007] S1. Road surface conditions: Prepare a straight test road, including an acceleration section and a braking section, with braking obstacles set up on the braking section;

[0008] S2. Climate conditions: Sunny weather, wind less than level 3, no fog, temperature range: 5℃~38℃;

[0009] S3. Testing instruments: tire bulge tester, tire pressure gauge and non-contact speed measuring instrument;

[0010] S4. Test vehicle conditions: The test vehicle shall be operational and have braking function, and the wheel rim size shall conform to the relevant specifications in GB / T2978 and GB / T2977.

[0011] Prepare five or more new tires produced in the same batch and stored in the same environment.

[0012] Support tires were installed on the rear wheels of the vehicle, and test tires were installed on the front wheels. All tires were placed under the same environmental conditions after being mounted on the rims.

[0013] Experimental procedure:

[0014] A1. Install speed measuring instruments on the test vehicle;

[0015] A2. Install braking obstacles on the test road surface;

[0016] A3. Re-inspect: Check the tire appearance, sidewalls, and beads for bulges or cracks and mark them;

[0017] A4. Select values ​​within the range of impact speed greater than or equal to 20 km / h and less than or equal to 60 km / h, and conduct impacts in ascending order;

[0018] A5. When the vehicle travels to the braking obstacle, the speed reaches the specified impact speed, and then the impact is carried out. The left front wheel and the right front wheel of the vehicle impact each time at each impact speed, and the impact is greater than or equal to 2 times.

[0019] A6. After each impact, stop for at least 3 minutes, check and record the appearance of the tire impact point for any abnormalities, as well as the tire pressure and air temperature information. If the tire appears normal after the impact, adjust the tire pressure to the specified pressure and continue the test. If the tire is damaged after the impact, mark the damaged area and replace it with a spare tire to continue the impact test.

[0020] A7. Tests on the same tire model are conducted on the same working day, with the same driver and vehicle, to ensure the stability of the test;

[0021] A8. After the test, inspect the tire appearance for bulges or cracks on the tire sidewall or bead.

[0022] A9. Test Conclusion: If the test tires show no abnormalities in appearance after being tested at the specified impact speed, the conclusion is that the test tires passed the specified impact speed test and showed no abnormalities in appearance; if the test tires show abnormalities in appearance after being tested at a certain specified impact speed, the conclusion is that the test tires failed to pass the specified impact speed test and were damaged.

[0023] A10. Prepare a test report.

[0024] Furthermore, S1. Road surface conditions: The straight test road is a cement or asphalt road surface, and the road surface is dry, flat and free of potholes. The acceleration section is longer than 150m and wider than 10m; the braking section is longer than 100m and wider than 15m; the braking obstacle is an impact protrusion.

[0025] Furthermore, S2. Climate conditions: visibility greater than 165m, wind less than level 2, and temperature change during the test should not exceed 10℃.

[0026] Furthermore, non-contact speed measuring instruments are VBox or pbox.

[0027] Furthermore, S4. Test vehicle conditions: There are 5 tires, 2 for testing, 2 for rear wheel support, and 1 spare.

[0028] Furthermore, all tires should be installed in a shaded area after mounting on the rim to prevent overheating from sunlight. The tire inflation pressure should be the value specified at the time of manufacture or the value required by the commissioning unit, and the pressure value should not exceed the inflation pressure value marked on the tire sidewall.

[0029] Furthermore, the A3 impact speeds are 20km / h, 25km / h, 30km / h, 35km / h, 40km / h, 45km / h, 50km / h, 55km / h, and 60km / h, with the error for each impact speed controlled within ±1km / h.

[0030] Furthermore, when the A5 vehicle approaches the braking obstacle, its speed reaches the prescribed impact speed before impacting, with the left and right front wheels impacting twice at each impact speed.

[0031] Furthermore, after each impact, the A6 was stopped for 3 minutes to check and record the appearance of the tire impact point, as well as the tire pressure and air temperature information. If the tire appeared normal after the impact, the tire pressure was adjusted to the specified pressure, and the test continued. If the tire was damaged after the impact, the damaged area was marked, and the spare tire was used to continue the impact test.

[0032] Further, after the A8 test, the tire appearance is inspected to check for bulges or cracks on the tire sidewall or bead area. This is done by visual inspection or touch, and the specific bulge height is measured using a bulge meter.

[0033] Compared with the prior art, the beneficial effects of the present invention are: a method for testing tire impact protrusions on actual vehicles, the method comprising:

[0034] Experimental conditions:

[0035] S1. Road surface conditions: Prepare a straight test road, including an acceleration section and a braking section, with braking obstacles set up on the braking section;

[0036] S2. Climate conditions: Sunny weather, wind less than level 3, no fog, temperature range: 5℃~38℃;

[0037] S3. Testing instruments: tire bulge tester, tire pressure gauge and non-contact speed measuring instrument;

[0038] S4. Test vehicle conditions: The test vehicle shall be operational and have braking function, and the wheel rim size shall conform to the relevant specifications in GB / T2978 and GB / T2977.

[0039] Prepare five or more new tires produced in the same batch and stored in the same environment.

[0040] Support tires were installed on the rear wheels of the vehicle, and test tires were installed on the front wheels. All tires were placed under the same environmental conditions after being mounted on the rims.

[0041] Experimental procedure:

[0042] A1. Install non-contact speed measuring instruments on the test vehicle;

[0043] A2. Install braking obstacles on the test road surface;

[0044] A3. Re-inspect: Check the tire appearance, sidewalls, and beads for bulges or cracks and mark them;

[0045] A4. Select values ​​within the range of impact speed greater than or equal to 20 km / h and less than or equal to 60 km / h, and conduct impacts in ascending order;

[0046] A5. When the vehicle travels to the braking obstacle, the speed reaches the specified impact speed, and then the impact is carried out. The left front wheel and the right front wheel of the vehicle impact each time at each impact speed, and the impact is greater than or equal to 2 times.

[0047] A6. After each impact, stop for at least 3 minutes, check and record the appearance of the tire impact point for any abnormalities, as well as the tire pressure and air temperature information. If the tire appears normal after the impact, adjust the tire pressure to the specified pressure and continue the test. If the tire is damaged after the impact, mark the damaged area and replace it with a spare tire to continue the impact test.

[0048] A7. Tests on the same tire model are conducted on the same working day, with the same driver and vehicle, to ensure the stability of the test;

[0049] A8. After the test, inspect the tire appearance for bulges or cracks on the tire sidewall or bead.

[0050] A9. Test Conclusion: If the test tires show no abnormalities in appearance after being tested at the specified impact speed, the conclusion is that the test tires passed the specified impact speed test and showed no abnormalities in appearance; if the test tires show abnormalities in appearance after being tested at a certain specified impact speed, the conclusion is that the test tires failed to pass the specified impact speed test and were damaged.

[0051] A10. Prepare a test report.

[0052] The rigorous and meticulous preparation in the early stages, along with the strict requirements for testing conditions, greatly improves the accuracy of the tests, reduces the failure rate, and diversifies the vehicle tire impact testing, thereby enhancing the accuracy of the vehicle tire impact resistance performance evaluation results and enabling accurate determination of the vehicle tire's impact resistance performance. Attached Figure Description

[0053] Figure 1This is a schematic diagram of a real-vehicle impact test of the left front tire's protrusion.

[0054] Figure 2 This is a schematic diagram of a real-vehicle impact test of the right front tire against the raised platform. Detailed Implementation

[0055] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of those features, used to distinguish and describe features, without any order or emphasis. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] Reference Figure 1-2 A method for testing tire impact protrusions on actual vehicles, the method comprising:

[0060] Experimental conditions:

[0061] S1. Road surface conditions: Prepare a straight test road, including an acceleration section and a braking section, with braking obstacles set up on the braking section;

[0062] S2. Climate conditions: Sunny weather, wind less than level 3, no fog, temperature range: 5℃~38℃;

[0063] S3. Testing instruments: tire bulge tester, tire pressure gauge and non-contact speed measuring instrument;

[0064] S4. Test vehicle conditions: The test vehicle shall be operational and have braking function, and the wheel rim size shall conform to the relevant specifications in GB / T2978 and GB / T2977.

[0065] Prepare five or more new tires produced in the same batch and stored in the same environment.

[0066] Support tires were installed on the rear wheels of the vehicle, and test tires were installed on the front wheels. All tires were placed under the same environmental conditions after being mounted on the rims.

[0067] Experimental procedure:

[0068] A1. Install non-contact speed measuring instruments on the test vehicle;

[0069] A2. Install braking obstacles on the test road surface;

[0070] A3. Re-inspect: Check the tire appearance, sidewalls, and beads for bulges or cracks and mark them;

[0071] A4. Select values ​​within the range of impact speed greater than or equal to 20 km / h and less than or equal to 60 km / h, and conduct impacts in ascending order;

[0072] A5. When the vehicle travels to the braking obstacle, the speed reaches the specified impact speed, and then the impact is carried out. The left front wheel and the right front wheel of the vehicle impact each time at each impact speed, and the impact is greater than or equal to 2 times.

[0073] A6. After each impact, stop for at least 3 minutes, check and record the appearance of the tire impact point for any abnormalities, as well as the tire pressure and air temperature information. If the tire appears normal after the impact, adjust the tire pressure to the specified pressure and continue the test. If the tire is damaged after the impact, mark the damaged area and replace it with a spare tire to continue the impact test.

[0074] A7. Tests on the same tire model are conducted on the same working day, with the same driver and vehicle, to ensure the stability of the test;

[0075] A8. After the test, inspect the tire appearance for bulges or cracks on the tire sidewall or bead.

[0076] A9. Test Conclusion: If the test tires show no abnormalities in appearance after being tested at the specified impact speed, the conclusion is that the test tires passed the specified impact speed test and showed no abnormalities in appearance; if the test tires show abnormalities in appearance after being tested at a certain specified impact speed, the conclusion is that the test tires failed to pass the specified impact speed test and were damaged.

[0077] A10. Prepare a test report.

[0078] Further preferred, S1. Road surface conditions: The straight test road is a cement road or asphalt road, and the road surface is dry, flat and without potholes. The acceleration section is longer than 150m and wider than 10m; the braking section is longer than 100m and wider than 15m; the braking obstacle is an impact protrusion.

[0079] Further preferred, S2. Climate conditions: visibility greater than 165m, wind less than level 2, and temperature change during the test should not exceed 10℃.

[0080] Further preferred non-contact speed measuring instruments are VBox or pbox.

[0081] Further preferred, S4. Test vehicle conditions: There are 5 tires, 2 for testing, 2 for rear wheel support, and 1 spare.

[0082] Further preferably, all tires are installed on the rim in a shaded area to prevent overheating from sunlight. The tire inflation pressure is the value specified at the time of manufacture or the value required by the commissioning unit, and the pressure value shall not exceed the inflation pressure value marked on the tire sidewall.

[0083] Further preferred, the A3 impact speeds are 20km / h, 25km / h, 30km / h, 35km / h, 40km / h, 45km / h, 50km / h, 55km / h, and 60km / h, with the error of each impact speed controlled within ±1km / h.

[0084] In a further preferred embodiment, when the A5 vehicle travels to the distance to the braking obstacle, the driving speed reaches the specified impact speed, and then the impact is carried out, with the left front wheel and the right front wheel impacting twice at each impact speed.

[0085] In a further preferred embodiment, after each impact, the A6 is stopped for 3 minutes to check and record the appearance of the tire impact point, as well as the tire pressure and air temperature information. If the tire appears normal after the impact, the tire pressure is adjusted to the specified pressure and the test continues. If the tire is damaged after the impact, the damaged area is marked and the tire is replaced with a spare tire to continue the impact test.

[0086] Further preferred, after the A8 test, the tire appearance is inspected to check for bulges or cracks on the tire sidewall or bead, by visual inspection or touch, and the specific bulge height is measured with a bulge meter.

[0087] Road surface conditions: The test road is a straight, dry road surface. The acceleration and braking sections can be either concrete or asphalt pavement; they must be flat, straight, and free of potholes and obstacles. The test road consists of three parts: an acceleration section longer than 150m and wider than 10m, a braking obstacle consisting of an impact protrusion, and a braking section longer than 100m and wider than 15m. The diagram for the impact protrusion test is shown below. Figure 1 and Figure 2 .

[0088] Climate conditions: The experiment must be conducted in clear weather to ensure a wide field of vision; the experiment cannot be conducted in poor visibility, foggy, cloudy, or windy weather with wind force exceeding level 3.

[0089] During the test, the temperature change should not exceed 10℃, and the temperature range should be 5℃~38℃. This temperature range accounts for a large proportion of the year and is consistent with the normal operating temperature range of vehicles.

[0090] Test vehicle conditions: The test vehicle shall be provided or designated by the client. The test shall be conducted on a vehicle in good condition. The safety performance of the test vehicle, such as braking and handling, shall meet the requirements.

[0091] The test rim dimensions should conform to the rim specifications specified in relevant yearbooks such as GB / T2978 and GB / T2977.

[0092] Use the standard rims of the experimental vehicle, or standard rims with a width ±0.5 inches that meet the vehicle assembly requirements.

[0093] The impact speeds are: 20km / h, 25km / h, 30km / h, 35km / h, 40km / h, 45km / h, 50km / h, 55km / h, and 60km / h, with the error for each impact speed controlled within ±1km / h.

[0094] Test instruments and equipment: tire bulge tester, tire pressure gauge, and non-contact measuring instruments such as VBox or pbox are used to test vehicle speed.

[0095] Test tires: It is recommended to prepare 5 test tires for each program: 2 for testing, 2 for rear wheel support, and 1 as a spare.

[0096] The test tires should be from the same batch and stored in the same environment. They should be new tires that pass the appearance inspection.

[0097] Using standard installation methods, mount the test tires onto rims that meet the requirements. A suitable amount of lubricant may be used to facilitate installation. All assembled test tires should be placed outdoors under identical environmental conditions, protected from direct sunlight to prevent overheating. Then, adjust the tire inflation pressure to the specified test pressure.

[0098] Test tire pressure and load: The inflation pressure should, in principle, be based on the pressure value specified by the manufacturer when the test vehicle leaves the factory, or the pressure value specified by the commissioning unit, but it should not exceed the inflation pressure marked on the tire sidewall.

[0099] Unless otherwise specified, the test load should be based on an empty vehicle plus the driver and co-driver. If there are specific requirements, the load should be as specified by the client, but it must not exceed the vehicle's maximum load specification.

[0100] Experimental steps:

[0101] Prepare the test vehicle and test equipment. Ensure the test equipment is in normal working order. If any equipment is damaged and cannot be used for testing, replace it with a working one.

[0102] Ensuring the test vehicle is in good working order means that there is no damage or abnormality in any components of the frame, shock absorbers, or chassis. Safety confirmation refers to verifying that the seat belts and brakes are functioning properly. Before the test, the driving safety performance of the test vehicle must be reconfirmed to meet the testing requirements.

[0103] Speed ​​measuring instruments were installed on the test vehicle: one was installed in the driver's cab, and the speed display device was installed in a position that was easy for the driver to observe.

[0104] Test surface preparation: Before the test, the impact boss needs to be installed on the test surface at the angles required by the client. The driver needs to confirm the installed impact boss conditions, such as the boss height, rounded corners, and installation angle. For example, the boss height is 100mm, the rounded corner is R10, and the installation angle is 45 degrees, etc.

[0105] Test tire installation preparation: Re-inspect the tire appearance, confirming there are no bulges, cracks, or other defects on the sidewalls and beads. Then, install the tires to be tested and mark them with the test number, wheel position, and other information using a white marker. Label the test tires with their numbers and wheel positions, such as left front tire, right front tire, etc. Since the tires are black, white markings are more conspicuous.

[0106] Tire installation: The rear wheels are fitted with support tires, and the front wheels are fitted with test tires. The front wheels are the first to contact the boss, and the impact speed at this point meets the requirements. When the rear wheels contact the boss later, the impact speed is already less than the required impact speed. For example, if the impact speed is 25 km / h, the front wheels can be controlled within the range of 25 ± 1 km / h. After the impact on the front wheels, the speed of the test vehicle when the rear wheels contact the boss is already less than the impact speed.

[0107] Test tire testing: Tests are conducted at specified impact speeds, increasing from low to high, with each impact speed error controlled within ±1 km / h. Under the same impact cam condition, tires of the same specification, structure, material, and production time from the same tire manufacturer, installed on vehicles of different brands, may yield different impact results. Similarly, tires of the same specification from different tire manufacturers installed on the same test vehicle under the same cam condition may also produce different impact results. Specific results can only be determined through testing. Therefore, the brand and model of the test vehicle are determined by the client. We focus on the test tire results at different impact speeds under the same cam condition.

[0108] The test vehicle travels in a straight line. When it reaches the impact condition, it is impacted at the specified impact speed. The left front wheel and the right front wheel are impacted twice at each impact speed.

[0109] After each impact, stop for 3 minutes and check and record the tire's appearance, tire pressure, and air temperature at the impact point. If the tire appears normal after the impact, adjust the tire pressure to the specified pressure and continue the test. If the tire is damaged after the impact, mark the damaged area with a marker. The tire test for that wheel position is now complete. If the test for the other wheel position is not yet complete, replace the tire with the spare tire at the damaged wheel position and conduct the tire impact test for the other wheel position. If the tire is damaged after an impact at 50 km / h, mark the damaged area with a marker. The tire test for that wheel position is now complete. If the test for the other wheel position is not yet complete, replace the tire with the spare tire at the damaged wheel position and conduct the tire impact test for the other wheel position. If there is no damage after exceeding 60 km / h, the tire has strong impact resistance.

[0110] The test tires were tested on the same working day, and the driver and vehicle remained the same to ensure the stability of the test.

[0111] Post-test tire visual inspection: If the test tire's visual appearance is normal, but there are bulges on the tire sidewall or bead, these are inspected visually or by touch. The bulge height is measured using a bulge meter. If there are cracks on the tire sidewall or bead, these are also inspected visually. A bulge or crack is defined as tire damage at that location, and the test for that tire is terminated. A bulge is defined as a bulge that is visually noticeably higher than surrounding areas or slightly raised to the touch; this indicates a breakage of the internal cords in the tire, and the test result is that the tire is damaged.

[0112] Conclusion: The test tire showed no abnormalities in appearance after being tested at each of the specified impact speeds. Therefore, the test tire showed no abnormalities in appearance after being impacted at the specified speeds.

[0113] The test tire showed abnormalities after being tested at a specified impact speed. The conclusion was that the test tire failed to pass the specified impact speed test and was damaged.

[0114] Test Report:

[0115] Test reports should include the following:

[0116] Test personnel, test date;

[0117] Test site, test vehicles;

[0118] Test tire number, tire brand, specifications, load index, speed symbol, tire tread pattern, manufacturing cycle, etc.

[0119] Test rim specifications;

[0120] Test air pressure, test load;

[0121] Dimensions for impact conditions;

[0122] in conclusion.

[0123] The test report is as follows:

[0124] Tire outdoor vehicle crash performance test report

[0125]

[0126]

[0127] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0128] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A method for testing tire impact protrusions on actual vehicles, characterized in that, The tire impact protrusion test methods include: Test conditions: S1. Road surface conditions: Prepare a straight test road, including an acceleration section and a braking section, with braking obstacles set up on the braking section; S2. Climate conditions: Sunny weather, wind less than level 3, no fog, temperature range: 5℃~38℃; S3. Testing instruments: tire bulge tester, tire pressure gauge and non-contact speed measuring instrument; S4. Test vehicle conditions: The test vehicle shall be operational and have braking function, and the wheel rim dimensions shall conform to the relevant specifications in GB / T2978 and GB / T2977. Prepare five or more new tires produced in the same batch and stored in the same environment. Support tires were installed on the rear wheels of the vehicle, and test tires were installed on the front wheels. All tires were placed under the same environmental conditions after being mounted on the rims. Experimental procedure: A1. Install speed measuring instruments on the test vehicle; A2. Install braking obstacles on the test road surface; A3. Re-inspect: Check the tire appearance, sidewalls, and beads for bulges or cracks and mark them; A4. Select values ​​within the range of impact speed greater than or equal to 20 km / h and less than or equal to 60 km / h, and conduct impacts in ascending order; A5. When the vehicle travels to the braking obstacle, the speed reaches the specified impact speed, and then the impact is carried out. The left front wheel and the right front wheel of the vehicle impact each time at each impact speed, and the impact is greater than or equal to 2 times. A6. After each impact, stop for at least 3 minutes, check and record the appearance of the tire impact point for any abnormalities, as well as the tire pressure and air temperature information. If the tire appears normal after the impact, adjust the tire pressure to the specified pressure and continue the test. If the tire is damaged after the impact, mark the damaged area and replace it with a spare tire to continue the impact test. A7. Tests on the same tire model are conducted on the same working day, with the same driver and vehicle, to ensure the stability of the test; A8. After the test, inspect the tire appearance for bulges or cracks on the tire sidewall or bead. A9. Test Conclusion: If the test tires show no abnormalities in appearance after being tested at the specified impact speed, the conclusion is that the test tires passed the specified impact speed test and showed no abnormalities in appearance; if the test tires show abnormalities in appearance after being tested at a certain specified impact speed, the conclusion is that the test tires failed to pass the specified impact speed test and were damaged. A10. Prepare a test report.

2. The method for testing tire impact bosses on actual vehicles according to claim 1, characterized in that, S1. Road surface conditions: The straight test road is a cement or asphalt road surface, and the road surface is dry, flat and free of potholes. The acceleration section is longer than 150m and wider than 10m; the braking section is longer than 100m and wider than 15m. The braking obstacle is an impact protrusion.

3. A method for testing tire impact bosses on actual vehicles according to claim 1, characterized in that, S2. Climate conditions: Visibility greater than 165m, wind less than level 2, and temperature change during the test should not exceed 10℃.

4. A method for testing tire impact bosses on actual vehicles according to claim 1, characterized in that, Non-contact speed measuring instruments are VBox or pbox.

5. A method for testing tire impact bosses on actual vehicles according to claim 1, characterized in that, S4. Test vehicle conditions: There are 5 tires in total, 2 for testing, 2 for rear wheel support, and 1 spare tire.

6. A method for testing tire impact bosses on actual vehicles according to claim 1, characterized in that, All tires should be installed on the rims away from sunlight to prevent overheating. The tire inflation pressure should be the value specified at the time of manufacture or the value required by the commissioning unit. The tire pressure should not exceed the inflation pressure value marked on the tire sidewall.

7. A method for testing tire impact bosses on actual vehicles according to claim 1, characterized in that, The A3 impact speeds are 20km / h, 25km / h, 30km / h, 35km / h, 40km / h, 45km / h, 50km / h, 55km / h, and 60km / h, with the error for each impact speed controlled within ±1km / h.

8. A method for testing tire impact bosses on actual vehicles according to claim 1, characterized in that, When the A5 vehicle reaches the braking obstacle, its speed reaches the prescribed impact speed, and then it impacts the obstacle. The left front wheel and the right front wheel each impact twice at each impact speed.

9. A method for testing tire impact bosses on actual vehicles according to claim 1, characterized in that, After each impact, stop the A6 for 3 minutes and check and record the appearance of the tire impact point, as well as the tire pressure and air temperature information. If the tire appears normal after the impact, adjust the tire pressure to the specified pressure and continue the test. If the tire is damaged after the impact, mark the damaged area and replace it with a spare tire to continue the impact test.

10. A method for testing tire impact bosses on actual vehicles according to claim 1, characterized in that, After the A8 test, inspect the tire's appearance, checking for bulges or cracks on the tire sidewall or bead area. Use visual inspection or touch to check for bulge height using a bulge meter.

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