Method for testing actual parking torque of parking brake

Abstract

The invention discloses a method for testing the actual parking torque of a parking brake, and relates to the technical field of parking automation, and the method comprises the steps: step 1, bench test inspection, step 2, road test inspection, and step 3, parking torque test verification: in the step 1 and bench test inspection, the parking brake is detected through a flat plate brake test bench, and the actual parking torque of the parking brake is detected through the road test bench; the qualified safety efficiency of the design of the parking brake is improved, the parking flexibility is improved, and parking control operation is more convenient. In the second step of road test inspection, the parking coincidence index of the parking brake is evaluated by conducting road test inspection on the braking performance on an actual road, the occurrence situation of the vehicle sliding problem is reduced, vehicle sliding accidents are reduced, the accuracy and reliability of a test result are improved, the long-term operation cost is reduced, and the safety of personnel and equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of parking brakes, and in particular to a method for testing an actual parking torque of a parking brake. Background Art

[0002] As an important part of the automobile safety system, the parking brake not only keeps the vehicle stable when parking and prevents sliding or accidental movement, but also provides necessary auxiliary braking during driving. Through the actual parking torque test, potential safety hazards can be discovered in time, and corresponding measures can be taken to make adjustments to ensure driving safety. However, in actual use, the performance of the parking brake is affected by many factors, so it is necessary to test the actual parking torque of the parking brake.

[0003] Prior art, such as the invention application patent with announcement number: CN118408670A, discloses a method, device, equipment and medium for testing the actual parking torque of a parking brake, which belongs to the field of vehicle testing technology. The method comprises the following steps: in response to the parking operation state on the vehicle, controlling the vehicle to start, and obtaining the actual torque of the driving motor according to the accelerator pedal state and the wheel state; obtaining the maximum parking torque of the parking brake according to the actual torque of the driving motor and the reduction ratio of the reducer; based on the maximum parking torque of the parking brake and in combination with the verification model, verifying the static parking of the parking brake with the maximum tonnage of the same slope or the static parking of the maximum slope of the same tonnage, it can be easily concluded that the parking brake meets the static parking of the maximum tonnage of the same slope or the static parking of the maximum slope of the same tonnage, which solves the problems of complex testing process in the prior art, high requirements on the vehicle, the need to assemble a cargo box and a load of corresponding weight, and time-consuming and resource-consuming.

[0004] Based on the above solutions, it can be found that the actual parking torque test of the parking brake in the prior art can meet the basic requirements, but there are also some potential defects and challenges, which are specifically reflected in the following aspects: 1. The research on the sealing value, rigidity value and torsional fatigue value of the brake caliper of the parking brake during the detection process in the prior art is not in-depth enough. The sealing value, rigidity value and torsional fatigue value of the brake caliper of the parking brake during the detection process have a crucial impact on the design compliance index of the parking brake. Since the sealing value, rigidity value and torsional fatigue value of the brake caliper of the parking brake during the detection process are not accurate, the qualified safety efficiency of the design of the parking brake is affected, the parking flexibility is reduced, and the operation is inconvenient.

[0005] 2. In the prior art, insufficient attention is paid to the internal parking compliance index of the parking brake and the external parking compliance index of the parking brake, and the braking force and the wheelbase of each wheel cannot be detected in time, resulting in vehicle sliding, increasing the number of rolling accidents, reducing the accuracy and reliability of the test results, increasing long-term operating costs, and reducing the safety of personnel and equipment. Summary of the invention

[0006] The purpose of the present invention is to provide a method for testing the actual parking torque of a parking brake, which solves the problems existing in the background technology.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a method for testing the actual parking torque of a parking brake, the method comprising the following steps: step one, bench test inspection, step two, road test inspection and step three, parking torque test verification.

[0008] Step 1: Bench test: Test the parking brake using a flat brake test bench to obtain the caliper sealing value, rigidity value, and torsional fatigue value of the parking brake during the test process, and then analyze the design compliance index of the parking brake.

[0009] Step 2: Road test inspection: Through the road test inspection of the braking performance on the actual road, which is divided into flat road emergency braking test and slope emergency braking test, the flat road emergency braking data and slope emergency braking data are obtained to evaluate the parking compliance index of the parking brake.

[0010] Step 3: Parking torque test verification: According to the obtained parking brake design compliance index and the parking brake slope parking compliance index, the actual parking torque parking test index is determined, and then the staff is prompted.

[0011] Furthermore, the design compliance index of the parking brake is specifically analyzed by: based on the obtained caliper sealing value, rigidity value, and torsional fatigue value of the parking brake during the detection process, and obtaining the caliper sealing reference value, rigidity reference value, and torsional fatigue reference value of the parking brake during the detection process from the database, the design compliance index of the parking brake is analyzed, and the specific calculation formula is: ,in It is expressed as the brake caliper sealing value of the parking brake during the detection process. It is the reference value of the brake caliper seal of the parking brake during the test. It is expressed as the rigidity value of the parking brake during the detection process. It is expressed as the rigidity reference value of the parking brake during the detection process. It is expressed as the torsional fatigue value of the parking brake during the detection process. It is expressed as the torsional fatigue reference value of the parking brake during the detection process.

[0012] Furthermore, the specific analysis method of the braking performance road test on the actual road is as follows: perform emergency braking test on the actual road, put the vehicle at a predetermined initial speed, test on a flat road and a sloped road respectively, and ensure that the test road surface is flat, dry and clean, observe and record the data of the vehicle during the braking process, and then obtain flat road emergency braking data and slope emergency braking data, and analyze the parking compliance index of the parking brake.

[0013] Further, the parking compliance index of the parking brake is specifically analyzed by: based on the obtained flat road emergency braking data and slope emergency braking data, wherein the flat road emergency braking data includes the vehicle deceleration and suspension height in each time period during the detection process of the parking brake, and the slope emergency braking data includes the braking force of each wheel, the blocking force of each wheel, the wheelbase of each wheel, the endurance value of each wheel, the slope angle of each wheel and the friction radius of each wheel during the detection process of the parking brake, analyzing the flat road parking compliance index of the parking brake Hill parking compliance index with parking brake , and then analyze the parking compliance index of the parking brake , the specific calculation formula is: .

[0014] Furthermore, the flat road parking compliance index of the parking brake is specifically analyzed by: based on the obtained vehicle deceleration and suspension height in each time period during the detection process of the parking brake, and obtaining the reference vehicle deceleration and reference suspension height during the detection process of the parking brake from the database, analyzing the flat road parking compliance index of the parking brake, and the specific calculation formula is: ,in It is expressed as the reference vehicle deceleration during the parking brake detection process, Indicates the parking brake during the detection process. The vehicle deceleration in a time period, , It is the reference suspension height of the parking brake during the test. Indicates the suspension height of the parking brake during the test.

[0015] Furthermore, the slope parking compliance index of the parking brake is specifically analyzed by: based on the braking force of each wheel, the blocking force of each wheel, the wheelbase of each wheel, the endurance value of each wheel, the slope angle of each wheel and the friction radius of each wheel obtained during the detection process of the parking brake, the internal parking compliance index of the parking brake is analyzed. and parking brake external parking compliance index , and then analyze the slope parking compliance index of the parking brake, the specific calculation formula is: .

[0016] Furthermore, the internal parking compliance index of the parking brake is specifically analyzed by extracting the reference braking force of each wheel, the reference blocking force of each wheel, the reference wheelbase of each wheel and the reference endurance value of each wheel during the detection process of the parking brake from the database, and analyzing the internal compliance index of the parking brake. The specific calculation formula is: , in Indicates the parking brake during the detection process. The reference braking force of each wheel, Indicates the parking brake during the detection process. The braking force of each wheel, Indicates the parking brake during the detection process. The reference braking force of each wheel, Indicates the parking brake during the detection process. The braking force of each wheel, Indicates the parking brake during the detection process. The reference wheelbase of the wheels, Indicates the parking brake during the detection process. The wheelbase of the wheels, Indicates the parking brake during the detection process. The reference endurance value of each wheel, Indicates the parking brake during the test. The endurance of each wheel, , Indicates the number of the wheel on which the parking brake is being tested. The number of wheels represented.

[0017] Furthermore, the external parking compliance index of the parking brake is specifically analyzed by extracting the slope reference angle of each wheel and the reference friction radius of each wheel during the detection process of the parking brake from the database, and analyzing the external parking compliance index of the parking brake. The specific calculation formula is: ,in Indicates the parking brake during the detection process. The slope reference angle of each wheel, Indicates the number of times the automatic parking system is detected during the detection process. The slope angle of each wheel, Indicates the parking brake during the detection process. The reference friction radius of each wheel, Indicates the number of times the automatic parking system is detected during the detection process. The friction radius of the wheel.

[0018] Furthermore, the actual parking torque parking test index is specifically analyzed by: analyzing the actual parking torque parking test index, and the specific calculation formula is: .

[0019] Furthermore, the staff is prompted, and the specific analysis method is as follows: based on the actual parking torque parking test index obtained, the actual parking torque parking test index is compared with the actual parking torque parking test index threshold stored in the database; if the actual parking torque parking test index is equal to the parking compliance index threshold of the parking brake, the parking compliance index of the parking brake is recorded as qualified, otherwise it is recorded as unqualified; when the actual parking torque parking test index is recorded as qualified, a feedback report is sent; when the actual parking torque parking test index is recorded as unqualified, an emergency parking is performed, and an error report is sent to warn the staff.

[0020] The beneficial effects of the present invention are as follows: in step one, bench test inspection, the parking brake is tested by a flat brake test bench, and the brake caliper sealing value, rigidity value, and torsional fatigue value of the parking brake during the testing process are detected, and then the design compliance index of the parking brake is analyzed, thereby improving the qualified safety efficiency of the design of the parking brake, improving the parking flexibility, and making the parking control operation more convenient.

[0021] In step two, road test inspection, the braking performance is tested on actual roads, which is divided into flat road emergency braking test and slope emergency braking test, and then the flat road emergency braking data and slope emergency braking data are obtained, and then the parking compliance index of the parking brake is evaluated, the occurrence of vehicle sliding problems and rolling accidents are reduced, the accuracy and reliability of the test results are improved, the long-term operating costs are reduced, and the safety of personnel and equipment is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The present invention is a schematic flow chart of the steps for implementing the method. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Reference Figure 1 As shown, the present invention provides a method for testing the actual parking torque of a parking brake, comprising: step one, bench test inspection, step two, road test inspection and step three, parking torque test verification.

[0026] Step 1: Bench test: Test the parking brake on a flat brake test bench to obtain the caliper sealing value, rigidity value, and torsional fatigue value of the parking brake during the test process, and then analyze the design compliance index of the parking brake.

[0027] In the above embodiment, the design compliance index of the parking brake is specifically analyzed by: based on the obtained caliper sealing value, rigidity value, and torsional fatigue value of the parking brake during the detection process, and obtaining the caliper sealing reference value, rigidity reference value, and torsional fatigue reference value of the parking brake during the detection process from the database, the design compliance index of the parking brake is analyzed, and the specific calculation formula is: ,in It is expressed as the brake caliper sealing value of the parking brake during the detection process. It is the reference value of the brake caliper seal of the parking brake during the test. It is expressed as the rigidity value of the parking brake during the detection process. It is expressed as the rigidity reference value of the parking brake during the detection process. It is expressed as the torsional fatigue value of the parking brake during the detection process. It is expressed as the torsional fatigue reference value of the parking brake during the detection process.

[0028] In step one, bench test, the parking brake is tested on a flat brake test bench to obtain the caliper sealing value, rigidity value, and torsional fatigue value of the parking brake during the test process, and then the design compliance index of the parking brake is analyzed, which improves the qualified safety efficiency of the parking brake design, improves the parking flexibility, and makes the parking control operation more convenient.

[0029] Step 2: Road test inspection: Through the road test inspection of the braking performance on the actual road, which is divided into flat road emergency braking test and slope emergency braking test, the flat road emergency braking data and slope emergency braking data are obtained to evaluate the parking compliance index of the parking brake.

[0030] In the above embodiment, the specific analysis method of the road test inspection of the braking performance on the actual road is as follows: perform emergency braking detection on the actual road, put the vehicle at a predetermined initial speed, detect it on a flat road and a sloped road respectively, and ensure that the test road surface is flat, dry and clean, observe and record the data of the vehicle during the braking process, and then obtain the flat road emergency braking data and the slope emergency braking data, and analyze the parking compliance index of the parking brake.

[0031] In the above embodiment, the parking compliance index of the parking brake is specifically analyzed by: based on the obtained flat road emergency braking data and slope emergency braking data, wherein the flat road emergency braking data includes the vehicle deceleration and suspension height in each time period during the detection process of the parking brake, and the slope emergency braking data includes the braking force of each wheel, the blocking force of each wheel, the wheelbase of each wheel, the endurance value of each wheel, the slope angle of each wheel and the friction radius of each wheel during the detection process of the parking brake, analyzing the flat road parking compliance index of the parking brake Hill holding compliance index with parking brake , and then analyze the parking compliance index of the parking brake , the specific calculation formula is: .

[0032] In the above embodiment, the flat road parking compliance index of the parking brake is specifically analyzed by: based on the obtained vehicle deceleration and suspension height in each time period during the detection process of the parking brake, and obtaining the reference vehicle deceleration and reference suspension height during the detection process of the parking brake from the database, the flat road parking compliance index of the parking brake is analyzed, and the specific calculation formula is: ,in It is expressed as the reference vehicle deceleration during the parking brake detection process, Indicates the parking brake during the detection process. The vehicle deceleration in a time period, , It is the reference suspension height of the parking brake during the test. Indicates the suspension height of the parking brake during the test.

[0033] In the above embodiment, the slope parking compliance index of the parking brake is specifically analyzed by: analyzing the internal parking compliance index of the parking brake based on the braking force of each wheel, the blocking force of each wheel, the wheelbase of each wheel, the endurance value of each wheel, the slope angle of each wheel and the friction radius of each wheel obtained during the detection process of the parking brake and parking brake external parking compliance index , and then analyze the slope parking compliance index of the parking brake, the specific calculation formula is: .

[0034] In the above embodiment, the internal parking compliance index of the parking brake is specifically analyzed by extracting the reference braking force of each wheel, the reference blocking force of each wheel, the reference wheelbase of each wheel and the reference endurance value of each wheel during the detection process of the parking brake from the database, and analyzing the internal compliance index of the parking brake. The specific calculation formula is: , in Indicates the parking brake during the detection process. The reference braking force of each wheel, Indicates the parking brake during the detection process. The braking force of each wheel, Indicates the parking brake during the detection process. The reference braking force of each wheel, Indicates the parking brake during the detection process. The braking force of each wheel, Indicates the parking brake during the detection process. The reference wheelbase of the wheels, Indicates the parking brake during the detection process. The wheelbase of the wheels, Indicates the parking brake during the detection process. The reference endurance value of each wheel, Indicates the parking brake during the detection process. The endurance of each wheel, , Indicates the number of the wheel on which the parking brake is being tested. The number of wheels represented.

[0035] In the above embodiment, the external parking compliance index of the parking brake is specifically analyzed by extracting the slope reference angle of each wheel and the reference friction radius of each wheel during the detection process of the parking brake from the database, and analyzing the external parking compliance index of the parking brake. The specific calculation formula is: ,in Indicates the parking brake during the detection process. The slope reference angle of each wheel, Indicates the number of times the automatic parking system is detected during the detection process. The slope angle of each wheel, Indicates the parking brake during the detection process. The reference friction radius of each wheel, Indicates the number of times the automatic parking system is detected during the detection process. The friction radius of the wheel.

[0036] In the above embodiment, the actual parking torque parking test index is specifically analyzed by: analyzing the actual parking torque parking test index, and the specific calculation formula is: .

[0037] In step two, road test inspection, the braking performance is tested on actual roads, which is divided into flat road emergency braking test and slope emergency braking test, and then the flat road emergency braking data and slope emergency braking data are obtained, and then the parking compliance index of the parking brake is evaluated, the occurrence of vehicle sliding problems and rolling accidents are reduced, the accuracy and reliability of the test results are improved, the long-term operating costs are reduced, and the safety of personnel and equipment is improved.

[0038] Step 3: Parking torque test verification: According to the obtained parking brake design compliance index and the parking brake slope parking compliance index, the actual parking torque parking test index is determined, and then the staff is prompted.

[0039] In the above embodiment, the specific analysis method for prompting the staff is as follows: based on the actual parking torque parking test index obtained, the actual parking torque parking test index is compared with the actual parking torque parking test index threshold stored in the database; if the actual parking torque parking test index is equal to the parking compliance index threshold of the parking brake, the parking compliance index of the parking brake is recorded as qualified, otherwise it is recorded as unqualified; when the actual parking torque parking test index is recorded as qualified, a feedback report is sent; when the actual parking torque parking test index is recorded as unqualified, an emergency parking is performed, and an error report is sent to warn the staff.

[0040] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described 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 by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A method for testing the actual parking torque of a parking brake, characterized in that: include: Step 1: Bench test: Test the parking brake using a flat brake test bench to obtain the caliper sealing value, rigidity value, and torsional fatigue value of the parking brake during the test, and then analyze the design compliance index of the parking brake; Step 2: Road test: The braking performance is tested on the actual road, which is divided into a flat road emergency braking test and a slope emergency braking test, so as to obtain flat road emergency braking data and slope emergency braking data, and evaluate the parking compliance index of the parking brake; Step 3: Parking torque test verification: According to the obtained parking brake design compliance index and the parking brake slope parking compliance index, the actual parking torque parking test index is determined, and then the staff is prompted.

2. A parking brake actual parking torque test method according to claim 1, characterized in that: The design of the parking brake complies with the index, and the specific analysis method is as follows: Based on the obtained caliper sealing value, rigidity value, and torsional fatigue value of the parking brake during the detection process, and the caliper sealing reference value, rigidity reference value, and torsional fatigue reference value of the parking brake during the detection process are obtained from the database, the design compliance index of the parking brake is analyzed, and the specific calculation formula is: ,in It is expressed as the brake caliper sealing value of the parking brake during the detection process. It is the reference value of the brake caliper seal of the parking brake during the test. It is expressed as the rigidity value of the parking brake during the detection process. It is expressed as the rigidity reference value of the parking brake during the detection process. It is expressed as the torsional fatigue value of the parking brake during the detection process. It is expressed as the torsional fatigue reference value of the parking brake during the detection process.

3. A parking brake actual parking torque test method according to claim 1, characterized in that: The specific analysis method of the braking performance road test on the actual road is as follows: Carry out emergency braking test on actual road, set the vehicle to the predetermined initial speed, test on flat road and slope road respectively, and ensure that the test road surface is flat, dry and clean, observe and record the vehicle data during the braking process, and then obtain flat road emergency braking data and slope emergency braking data, and analyze the parking compliance index of the parking brake.

4. A parking brake actual parking torque test method according to claim 3, characterized in that: The parking compliance index of the parking brake is specifically analyzed by: Based on the obtained flat road emergency braking data and slope emergency braking data, where the flat road emergency braking data includes the vehicle deceleration and suspension height in each time period during the detection process of the parking brake, and the slope emergency braking data includes the braking force of each wheel, the blocking force of each wheel, the wheelbase of each wheel, the endurance value of each wheel, the slope angle of each wheel and the friction radius of each wheel during the detection process of the parking brake, the flat road parking compliance index of the parking brake is analyzed. Hill parking compliance index with parking brake , and then analyze the parking compliance index of the parking brake , the specific calculation formula is: .

5. A method for testing the actual parking torque of a parking brake according to claim 4, characterized in that: The specific analysis method of the flat road parking compliance index of the parking brake is as follows: Based on the obtained vehicle deceleration and suspension height at each time period during the parking brake detection process, and the reference vehicle deceleration and reference suspension height during the parking brake detection process are obtained from the database, the flat road parking compliance index of the parking brake is analyzed, and the specific calculation formula is: ,in It is represented as the reference vehicle deceleration during the parking brake test. Indicates the parking brake during the detection process. The vehicle deceleration in a time period, , It is the reference suspension height of the parking brake during the test. Indicates the suspension height of the parking brake during the test.

6. A method for testing the actual parking torque of a parking brake according to claim 4, characterized in that: The slope parking compliance index of the parking brake is specifically analyzed as follows: Based on the braking force of each wheel, the blocking force of each wheel, the wheelbase of each wheel, the endurance value of each wheel, the slope angle of each wheel and the friction radius of each wheel obtained during the detection process of the parking brake, the internal parking compliance index of the parking brake is analyzed. and parking brake external parking compliance index , and then analyze the slope parking compliance index of the parking brake, the specific calculation formula is: .

7. A method for testing the actual parking torque of a parking brake according to claim 6, characterized in that: The internal parking compliance index of the parking brake is specifically analyzed as follows: The reference braking force of each wheel, the reference blocking force of each wheel, the reference wheelbase of each wheel and the reference endurance value of each wheel during the detection process of the parking brake are extracted from the database, and the internal compliance index of the parking brake is analyzed. The specific calculation formula is: ， in Indicates the parking brake during the detection process. The reference braking force of each wheel, Indicates the parking brake during the detection process. The braking force of each wheel, Indicates the parking brake during the detection process. The reference braking force of each wheel, Indicates the parking brake during the detection process. The braking force of each wheel, Indicates the parking brake during the detection process. The reference wheelbase of the wheels, Indicates the parking brake during the detection process. The wheelbase of the wheels, Indicates the parking brake during the detection process. The reference endurance value of each wheel, Indicates the parking brake during the detection process. The endurance of each wheel, , Indicates the number of the wheel on which the parking brake is being tested. The number of wheels represented.

8. A method for testing the actual parking torque of a parking brake according to claim 6, characterized in that: The specific analysis method of the external parking compliance index of the parking brake is as follows: The slope reference angle and reference friction radius of each wheel during the parking brake detection process are extracted from the database, and the external parking compliance index of the parking brake is analyzed. The specific calculation formula is: ,in Indicates the parking brake during the detection process. The slope reference angle of each wheel, Indicates the number of times the automatic parking system is detected during the detection process. The slope angle of each wheel, Indicates the parking brake during the detection process. The reference friction radius of each wheel, Indicates the number of times the automatic parking system is detected during the detection process. The friction radius of the wheel.

9. A method for testing the actual parking torque of a parking brake according to claim 1, characterized in that: The specific analysis method of the actual parking torque parking test index is as follows: Analyze the actual parking torque parking test index, the specific calculation formula is: .

10. A method for testing the actual parking torque of a parking brake according to claim 9, characterized in that: The specific analysis method for providing prompts to the staff is as follows: Based on the actual parking torque parking test index obtained, the actual parking torque parking test index is compared with the actual parking torque parking test index threshold stored in the database. If the actual parking torque parking test index is equal to the parking compliance index threshold of the parking brake, the parking compliance index of the parking brake is recorded as qualified, otherwise it is recorded as unqualified. When the actual parking torque parking test index is recorded as qualified, a feedback report is sent; when the actual parking torque parking test index is recorded as unqualified, emergency parking is performed, and an error report is sent to warn the staff.

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