CN115112224A - Test method for low-ringing noise of passenger vehicle brake - Google Patents
Test method for low-ringing noise of passenger vehicle brake Download PDFInfo
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- CN115112224A CN115112224A CN202210531030.XA CN202210531030A CN115112224A CN 115112224 A CN115112224 A CN 115112224A CN 202210531030 A CN202210531030 A CN 202210531030A CN 115112224 A CN115112224 A CN 115112224A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention belongs to the technical field of automobile noise; a test method for low noise of braking of passenger car is disclosed. Aiming at the brake needing to be evaluated, a corresponding new brake assembly is installed on the sample car; carrying out 200km brake running-in; after braking running-in, acquiring braking noise data; processing the low-noise data based on the collected noise data; and carrying out a low-ringing noise analysis result based on the processed data to generate a test report. The invention summarizes and analyzes the frequency of the noise by the objective test of the low-sounding noise, and the core content is that the specific frequency of the braking low-sounding is obtained by the objective test, thereby optimizing the braking low-sounding of the passenger vehicle.
Description
Technical Field
The invention belongs to the technical field of automobile noise; in particular to a test method for low-ringing noise of a passenger vehicle brake.
Background
The low-noise brake is generally noise generated by friction between a brake disc and a brake friction plate when a vehicle advances at a low speed, the low-noise brake is represented by continuous and stable single-frequency noise in the braking process, the characteristic frequency is generally below 500Hz, the noise frequently occurs in the garage for moving the vehicle back and forth, and the condition of low-speed following under congested road conditions is that the vehicle moves back and forth. At this time, the engine noise, the intake/exhaust noise, the road noise, and the wind noise contribute less to the vehicle interior noise, and the brake squeal noise is more likely to cause consumer complaints after the masking effect of these noises is lost. For new energy automobiles, braking noise is particularly prominent after engine noise and exhaust noise are eliminated.
The method has the advantages that objective test on low ringing noise does not exist in the prior art, subjective judgment is prone to be inaccurate, everyone feels different, and the problem that subsequent low ringing noise optimization is inaccurate is solved.
Disclosure of Invention
The invention provides a test method for low-ringing noise of a passenger vehicle brake, which summarizes and analyzes the frequency of the occurrence of the noise through objective test of the low-ringing noise, and has the core content of obtaining the specific frequency of the low-ringing noise of the brake through the objective test, thereby optimizing the low-ringing noise of the passenger vehicle brake.
The invention provides a vehicle.
The invention provides an electronic device for reading an experimental method in a storage medium.
The invention provides a computer-readable storage medium for storing the experimental method.
The invention is realized by the following technical scheme:
a test method for low-ringing noise of braking of a passenger vehicle is characterized in that a sample vehicle is provided with a corresponding new brake assembly aiming at a brake needing to be evaluated;
carrying out 200km brake running-in;
after braking running-in, acquiring braking noise data;
processing the low-noise data based on the collected noise data;
and carrying out a low-ringing noise analysis result based on the processed data to generate a test report.
A test method for low noise of passenger car brake comprises the following steps of carrying out 200km brake running-in under the constraint condition,
constraint 1: the braking times are not less than 500;
constraint 2: the brake disc temperature is not higher than 300 ℃.
The method for testing the braking low-ringing noise of the passenger vehicle comprises the steps that when the vehicle is in a D gear, a driver controls the strength of a brake pedal, noise searching is carried out within a low-speed crawling speed range of the vehicle until the braking low-ringing noise occurs, the strength of the brake pedal is maintained or finely adjusted at the moment, the braking low-ringing noise is kept continuously, and noise data in the process of synchronous recording are recorded.
The method for testing the braking low-ringing noise of the passenger vehicle comprises the specific steps of collecting braking noise data, namely after D gear measurement is finished, placing the vehicle in R gear, controlling brake pedal force by a driver, searching noise in a low-speed crawling speed range of the vehicle until the braking low-ringing noise appears, maintaining or finely adjusting the brake pedal force, keeping the braking low-ringing noise continuously, and synchronously recording the noise data in the process.
A test method for low noise of passenger vehicle brake includes that a driver controls brake pedal force to apply brake pressure below 5 bar;
the low-speed crawling speed range of the vehicle is specifically 3-8km/h corresponding to the lowest stable speed of a gear;
the fine-tuning brake pedal force is specifically that the adjusting range is +/-0.5 bar.
According to the test method for the low-ringing noise of the passenger vehicle during braking, the states of the brake disc and the friction plate are respectively divided into a cold state, a hot state and a wet state.
A test method for low noise of passenger car brake, wherein the cold state: the test vehicle is kept stand for at least 8 hours in an environment of-5 ℃ to 35 ℃ for one night, and the test can be carried out, wherein the temperature of a front wheel brake disc is not higher than 50 ℃ in the test process;
the thermal state is as follows: after the cold test is finished, continuously braking, heating the front wheel brake disc to 100 +/-5 ℃, and starting the test, wherein the temperature of the front wheel brake disc is not lower than 80 ℃ in the test process;
the wet state is as follows: and sprinkling water to the friction plate at normal temperature, wherein the water is sprayed in a spraying mode for 4-7 minutes to ensure that the whole friction plate is in a wet state, and after the water is sprayed and stands for 20 minutes, the test is carried out, wherein the temperature of the front wheel brake disc is not higher than 50 ℃ in the test process.
A vehicle, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to perform the method steps as described in any one of the above.
An electronic device comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus;
a memory for storing a computer program;
a processor for implementing any of the above method steps when executing a program stored in the memory.
A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method steps of any of the above.
The invention has the beneficial effects that:
the invention controls the state of the brake assembly, ensures the normal contact state of the brake assembly and the accuracy of the test result.
The invention comprehensively verifies the objective test under different brake disc and friction plate states (high/low temperature and humidity), and ensures the full certification of the test on the brake assembly.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
FIG. 2 is a schematic diagram of the automotive connection memory of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A test method for low-ringing noise of braking of a passenger vehicle is characterized in that a sample vehicle is provided with a corresponding new brake assembly aiming at a brake needing to be evaluated;
carrying out 200km brake running-in; the matching of brakes with corresponding brake assemblies is well known in the industry; the new brake assembly includes a brake caliper, a friction pad, and a brake disc; due to the fact that the problems of insufficient disc contact, angle deviation and the like can exist after the brake disc, the friction plate and the brake caliper are assembled, the running-in requirement is provided, and the normal contact state of the brake assembly and the accuracy of the test result are guaranteed through 200km of vehicle running.
After braking running-in, acquiring braking noise data;
processing the low-noise data based on the collected noise data;
and carrying out a low-ringing noise analysis result based on the processed data to generate a test report.
A test method for low noise of passenger car brake comprises the following steps of carrying out 200km brake running-in under the constraint condition,
constraint 1: the braking times are not less than 500;
constraint 2: the brake disc temperature is not higher than 300 ℃.
The method for testing the braking low-ringing noise of the passenger vehicle comprises the steps that when the vehicle is in a D gear, a driver controls the strength of a brake pedal, noise search is conducted within a low-speed crawling speed range (from 0km/h to the lowest stable vehicle speed corresponding to a gear) of the vehicle until the braking low-ringing noise occurs, the strength of the brake pedal is maintained or finely adjusted at the moment, the braking low-ringing noise is kept continuously, and noise data in the process are synchronously recorded.
The method for testing the braking low-ringing noise of the passenger vehicle comprises the steps that after D gear measurement is finished, the vehicle is in an R gear, a driver controls the strength of a brake pedal, noise search is conducted within a low-speed crawling speed range (from 0km/h to the lowest stable vehicle speed of a corresponding gear) of the vehicle until the braking low-ringing noise occurs, the strength of the brake pedal is maintained or finely adjusted at the moment, the braking low-ringing noise is kept continuously, and noise data in the process are synchronously recorded.
A test method for low noise of passenger vehicle brake includes that a driver controls brake pedal force to apply brake pressure below 5 bar;
the low-speed crawling speed range of the vehicle is specifically 3-8km/h corresponding to the lowest stable speed of a gear;
the fine-tuning brake pedal force is specifically that the adjusting range is +/-0.5 bar.
According to the test method for the low-ringing noise of the passenger vehicle during braking, the states of the brake disc and the friction plate are respectively divided into a cold state, a hot state and a wet state.
A test method for low noise of passenger car brake, wherein the cold state: the test vehicle is kept stand for one night in an environment of-5 ℃ to 35 ℃ and is kept stand for at least 8 hours, so that the test can be carried out, and the temperature of a front wheel brake disc is not higher than 50 ℃ in the test process;
the thermal state is as follows: after the cold test is finished, continuously braking, heating the front wheel brake disc to 100 +/-5 ℃, and starting the test, wherein the temperature of the front wheel brake disc is not lower than 80 ℃ in the test process;
the wet state is as follows: and sprinkling water to the friction plate at normal temperature, wherein the water is sprayed in a spraying mode for 4-7 minutes to ensure that the whole friction plate is in a wet state, and after the water is sprayed and stands for 20 minutes, the test is carried out, wherein the temperature of the front wheel brake disc is not higher than 50 ℃ in the test process.
The wet state is as follows: the friction plate is sprinkled under the normal temperature state, the sprinkling mode is adopted, the sprinkling is carried out for 4 minutes to ensure that the whole friction plate is in the wet state, the experiment is carried out after the sprinkling is finished and the friction plate is kept stand for 20 minutes, and the temperature of the front wheel brake disc is not higher than 50 ℃ in the experiment process.
The wet state is as follows: the friction plate is sprinkled under the normal temperature state, the sprinkling mode is adopted, the sprinkling is carried out for 5 minutes to ensure that the whole friction plate is in the wet state, the experiment is carried out after the sprinkling is finished and the friction plate is kept stand for 20 minutes, and the temperature of the front wheel brake disc is not higher than 50 ℃ in the experiment process.
The wet state is as follows: the friction plate is sprinkled under the normal temperature state, the sprinkling mode is adopted, the sprinkling is carried out for 6 minutes to ensure that the whole friction plate is in the wet state, the experiment is carried out after the sprinkling is finished and the friction plate is kept stand for 20 minutes, and the temperature of the front wheel brake disc is not higher than 50 ℃ in the experiment process.
The wet state is as follows: the friction plate is sprinkled under the normal temperature state, the sprinkling mode is adopted, the sprinkling is carried out for 7 minutes to ensure that the whole friction plate is in the wet state, the experiment is carried out after the sprinkling is finished and the friction plate is kept stand for 20 minutes, and the temperature of the front wheel brake disc is not higher than 50 ℃ in the experiment process.
A vehicle, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to perform the method steps as described in any one of the above.
An electronic device comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus;
a memory for storing a computer program;
a processor for implementing any of the above method steps when executing a program stored in the memory.
A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method steps of any of the above.
The vehicle further includes:
a communication interface 403 for communication between the memory 401 and the processor 402.
A memory 401 for storing computer programs executable on the processor 402.
If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (Extended Industry standard architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 2, but it is not intended that there be only one bus or one type of bus.
Optionally, in a specific implementation, if the memory 401, the processor 402, and the communication interface 403 are integrated on a chip, the memory 401, the processor 402, and the communication interface 403 may complete mutual communication through an internal interface.
The processor 402 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.
Claims (10)
1. A test method for low-ringing noise of braking of a passenger vehicle is characterized in that the test method specifically comprises the steps of installing a corresponding new brake assembly for a sample vehicle aiming at a brake needing to be evaluated;
carrying out 200km brake running-in;
after braking running-in, carrying out braking noise data acquisition;
processing the low-noise data based on the collected noise data;
and carrying out a low-ringing noise analysis result based on the processed data to generate a test report.
2. The method for testing the braking low-ringing noise of a passenger vehicle as claimed in claim 1, wherein the constraint condition for running-in of 200km brake is,
constraint condition 1: the braking times are not less than 500;
constraint 2: the brake disc temperature is not higher than 300 ℃.
3. The method for testing the braking whistling noise of the passenger vehicle as claimed in claim 1, wherein the braking noise data collection is specifically that when the vehicle is in a D gear, a driver controls the brake pedal force, noise search is carried out in a low-speed crawling speed range of the vehicle until the braking whistling noise occurs, at the moment, the brake pedal force is maintained or fine-tuned, the braking whistling noise is kept continuous, and noise data in the process of synchronous recording are collected.
4. The method for testing the braking low-ringing noise of the passenger vehicle as claimed in claim 1, wherein the braking noise data collection is specifically that after the D-range measurement is finished, the vehicle is in the R-range, the driver controls the brake pedal force, the noise search is performed in the low-speed crawling speed range of the vehicle until the braking low-ringing noise occurs, at this time, the brake pedal force is maintained or fine-tuned, the braking low-ringing noise is kept continuously, and the noise data in the process of synchronous recording are obtained.
5. The method for testing the braking low-ringing noise of the passenger vehicle as claimed in claim 3 or 4, wherein the driver controls the brake pedal force specifically by applying a brake pressure of less than 5 bar;
the low-speed crawling speed range of the vehicle is specifically 3-8km/h corresponding to the lowest stable speed of a gear;
the fine-tuning brake pedal force is specifically that the adjusting range is +/-0.5 bar.
6. The method of claim 2, wherein the brake disc state and the friction plate state are cold, hot and wet.
7. The method for testing passenger vehicle brake squeal noise of claim 6, wherein the cold state: the test vehicle is kept stand for one night in an environment of-5 ℃ to 35 ℃ and is kept stand for at least 8 hours, so that the test can be carried out, and the temperature of a front wheel brake disc is not higher than 50 ℃ in the test process;
the thermal state is as follows: after the cold test is finished, continuously braking, heating the front wheel brake disc to 100 +/-5 ℃, and starting the test, wherein the temperature of the front wheel brake disc is not lower than 80 ℃ in the test process;
the wet state is as follows: and sprinkling water to the friction plate at normal temperature, wherein the water is sprayed in a spraying mode for 4-7 minutes to ensure that the whole friction plate is in a wet state, and after the water is sprayed and stands for 20 minutes, the test is carried out, wherein the temperature of the front wheel brake disc is not higher than 50 ℃ in the test process.
8. A vehicle, characterized by comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor executing the program to implement the method steps of any of claims 1-7.
9. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any of claims 1 to 7 when executing a program stored in the memory.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the program is executable by a processor for implementing the method steps according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210531030.XA CN115112224A (en) | 2022-05-16 | 2022-05-16 | Test method for low-ringing noise of passenger vehicle brake |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210531030.XA CN115112224A (en) | 2022-05-16 | 2022-05-16 | Test method for low-ringing noise of passenger vehicle brake |
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| CN115112224A true CN115112224A (en) | 2022-09-27 |
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| CN202210531030.XA Pending CN115112224A (en) | 2022-05-16 | 2022-05-16 | Test method for low-ringing noise of passenger vehicle brake |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115891957A (en) * | 2022-11-22 | 2023-04-04 | 中国第一汽车股份有限公司 | Evaluation method for vehicle braking abnormal sound |
| CN116007963A (en) * | 2023-03-24 | 2023-04-25 | 江西五十铃汽车有限公司 | Automobile brake noise evaluation method, system, storage medium and equipment |
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2022
- 2022-05-16 CN CN202210531030.XA patent/CN115112224A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115891957A (en) * | 2022-11-22 | 2023-04-04 | 中国第一汽车股份有限公司 | Evaluation method for vehicle braking abnormal sound |
| CN116007963A (en) * | 2023-03-24 | 2023-04-25 | 江西五十铃汽车有限公司 | Automobile brake noise evaluation method, system, storage medium and equipment |
| CN116007963B (en) * | 2023-03-24 | 2023-08-22 | 江西五十铃汽车有限公司 | Automobile brake noise evaluation method, system, storage medium and equipment |
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