CN109677390B - Rapid positioning method and system for brake squeal - Google Patents
Rapid positioning method and system for brake squeal Download PDFInfo
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- CN109677390B CN109677390B CN201910059329.8A CN201910059329A CN109677390B CN 109677390 B CN109677390 B CN 109677390B CN 201910059329 A CN201910059329 A CN 201910059329A CN 109677390 B CN109677390 B CN 109677390B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a method and a system for quickly positioning brake squeal, belonging to the technical field of vehicles, wherein the method comprises the following steps: s1, setting the braking force of the braking system and starting the automobile, and when the automobile generates brake squeal, acquiring and analyzing noise data through a sensor arranged on the automobile body; s2, comparing acceleration signals at a brake caliper and a steering knuckle when the frequency main components of noise data collected by a sensor in the automobile seat cabin and a sensor near a wheel are consistent; and S3, when the frequency main components of the acceleration signals collected by the brake calipers and the steering knuckles are consistent and obvious order harmonic components exist, performing brake caliper mode troubleshooting, brake disc mode troubleshooting and friction plate mode troubleshooting, and accordingly positioning brake squeal. The method reduces the dependence and threshold of brake squeal problem positioning on experience, realizes the process and standardization of the whole process, improves the problem positioning precision, and can realize accurate positioning of the problem source in one day.
Description
Technical Field
The invention belongs to the technical field of vehicles, and particularly relates to a method and a system for quickly positioning brake squeal.
Background
The brake squeal problem of the automobile is very common, the cause of the brake squeal problem is complex, and factors which can cause the problem are many, so when a brake squeal complaint occurs, engineers need to spend a great deal of time for finding out the cause of the brake squeal, and then make improvement measures according to the positioning result. In the positioning process of brake squeal, an engineer is required to have rich experience, the time spent for positioning the brake squeal is different from one day to one month according to different experiences of the engineer, when the experience of the engineer is insufficient, the direction may be wrong, and the positioning accuracy is low; in addition, in many cases where technical capabilities are insufficient, accurate positioning of the problem cannot be achieved, and even wrong positioning may occur, and the problem cannot be solved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method and a system for quickly positioning brake squeal, which reduce the dependence of brake squeal problem positioning on experience and a threshold, realize the process and standardization of the whole process, improve the accuracy of problem positioning, and can realize accurate positioning of problem sources in one day.
The embodiment of the invention provides the following specific technical scheme:
in a first aspect, the present invention provides a method for fast location of brake squeal, the method comprising the steps of:
s1, setting the braking force of the braking system and starting the automobile, and when the automobile generates brake squeal, acquiring and analyzing noise data through a sensor arranged on the automobile body;
s2, comparing acceleration signals collected at a brake caliper and a steering knuckle when the frequency main components of the noise data collected by a sensor in the automobile seat cabin and a sensor near the wheel are consistent;
and S3, when the frequency main components of the acceleration signals collected by the brake calipers and the steering knuckles are consistent and obvious order harmonic components exist, performing brake caliper mode troubleshooting, brake disc mode troubleshooting and friction plate mode troubleshooting, and accordingly positioning brake squeal.
In some embodiments, said performing a brake caliper modal review, a brake disc modal review, and a friction disc modal review comprises:
when the frequency main components in the automobile seat cabin are consistent with the frequency main components in the automobile seat cabin, performing modal test on the brake caliper, judging whether the modal frequency main components obtained by the modal test are consistent with the frequency main components in the automobile seat cabin or not, and when the modal frequency main components are consistent with the frequency main components in the automobile seat cabin, determining that brake squeal is caused to the brake caliper;
when the frequency main components in the automobile cabin and the frequency main components in the automobile cabin of the brake caliper are not consistent with each other, comparing whether the frequency main components in the automobile cabin and the brake disc are consistent with each other or not, judging whether the modal frequency obtained by performing modal test on the brake disc is consistent with the frequency main components in the automobile cabin or not when the frequency main components in the automobile cabin and the frequency main components in the brake caliper are consistent with each other, and confirming that brake squeal is caused by the brake disc when the frequency main components in the brake disc and the frequency main components in the automobile cabin are consistent with each other;
when the frequency main components of the brake disc and the automobile cabin and the main components of the modal frequency of the brake disc are not consistent with the frequency main components in the automobile cabin, whether the main components of the modal frequency obtained by performing modal testing on the friction disc are consistent with the frequency main components in the automobile cabin or not is judged, and when the main components of the modal frequency obtained by performing modal testing on the friction disc are consistent with the frequency main components in the automobile cabin, it is determined that the friction disc causes brake squeal.
In some embodiments, the determining whether the main component of the modal frequency obtained by performing the modal test on the friction plate is consistent with the main component of the frequency in the automobile cabin, and when the two components are consistent, determining that the friction plate causes brake squeal further includes:
and when the main component of the modal frequency obtained by the friction plate through modal testing is inconsistent with the main component of the frequency in the automobile cabin, changing the braking force of the braking system, and repeating the steps S1-S3.
In some embodiments, the method further comprises:
when there is no significant consistent order harmonic component of the acceleration signals at the brake caliper and knuckle, it is determined that brake squeal is caused by the friction pads.
In some embodiments, the method further comprises:
and when the frequency principal components of the noise data collected by the sensor in the automobile seat cabin and the sensor near the wheel are inconsistent, determining that the noise is irrelevant to the braking system, and ending the positioning.
In some embodiments, before step S1, the method further includes:
an acceleration sensor is arranged on the left front brake caliper shell or the right front brake caliper shell, an acceleration sensor is arranged on the left steering knuckle assembly or the right steering knuckle assembly, a microphone sensor is arranged near the left front wheel or the right front wheel, and a microphone sensor is arranged on the left side or the right side of the front row cabin.
In a second aspect, the present invention provides a system based on the fast positioning method for brake squeal, and the system includes:
the data acquisition and processing module is used for setting the braking force of the braking system and starting the automobile, and when the automobile generates brake squeal, acquiring and analyzing noise data through a sensor arranged on the automobile body;
the brake squeal checking module is used for comparing the collected acceleration signals at the brake calipers and the steering knuckles when the frequency main components of the noise data collected by the sensors in the automobile cabin and the sensors near the wheels are consistent;
and when the acceleration signals at the brake calipers and the steering knuckle meet the conditions, carrying out caliper mode troubleshooting, brake disc mode troubleshooting and friction plate mode troubleshooting, thereby positioning the brake squeal.
In some embodiments, the brake squeal troubleshooting module comprises:
the caliper modal investigation module is used for carrying out modal test on the brake caliper when the frequency main components in the brake caliper and the automobile seat cabin are consistent, judging whether the frequency main components obtained by the modal test are consistent with the frequency main components in the automobile seat cabin or not, and confirming that brake squeal is caused by the brake caliper when the frequency main components obtained by the modal test are consistent with the frequency main components in the automobile seat cabin;
the brake disc modal investigation module is used for comparing whether the frequency main components in the brake caliper and the automobile cabin are consistent or not when the frequency main components in the automobile cabin and the main components of the modal frequency of the brake caliper are inconsistent with the frequency main components in the automobile cabin, judging whether the modal frequency obtained by the brake disc through modal testing is consistent with the frequency main components in the automobile cabin or not when the frequency main components in the brake caliper and the frequency main components in the automobile cabin are consistent, and confirming that brake squeal is caused by the brake disc when the frequency main components in the brake disc and the frequency main components in the automobile cabin are consistent;
and the friction plate modal investigation module is used for judging whether the main component of the modal frequency obtained by carrying out modal test on the friction plate is consistent with the main component of the frequency in the automobile cabin or not when the main components of the frequency in the frequency of the brake plate and the main component of the frequency in the automobile cabin are inconsistent, and confirming that the friction plate causes brake squeal when the main component of the modal frequency obtained by carrying out modal test on the friction plate is consistent with the main component of the frequency in the automobile cabin.
In some embodiments, the brake squeal checking module further comprises:
a friction lining checking module for determining that a brake squeal is caused by the friction lining when there is no significant consistent order harmonic component of the acceleration signals at the brake caliper and the knuckle.
In some embodiments, the system further comprises:
and the sensor arrangement module is used for respectively arranging an acceleration sensor on the left front brake caliper shell or the right front brake caliper shell, arranging an acceleration sensor on the left steering knuckle assembly or the right steering knuckle assembly, arranging a microphone sensor near the left front wheel or the right front wheel and arranging a microphone sensor on the left side or the right side of the front row of cabins.
The embodiment of the invention has the following beneficial effects:
1. the method can greatly reduce the positioning period of the brake squeal problem, and can be finished in one day according to the average level estimation of the operators, while other methods may need one month;
2. the invention is a standardized operation method, greatly reduces the requirement on the technical level of operators, and only needs to operate according to the steps;
3. the invention has higher positioning precision, and can realize precise positioning of problems only by operating according to the method because the invention considers all factors causing brake squeal.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for fast positioning of brake squeal according to a first embodiment of the present invention;
fig. 2 is a block diagram of a fast positioning system for braking howling according to a first embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below 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.
Example one
Fig. 1 is a flowchart illustrating a method for fast location of brake squeal according to an embodiment, and referring to fig. 1, the method includes the following steps:
and S1, setting the braking force of the braking system and starting the automobile, and when the automobile generates brake squeal, acquiring and analyzing noise data through a sensor arranged on the automobile body.
Specifically, an acceleration sensor is arranged on the left front brake caliper housing or the right front brake caliper housing, an acceleration sensor is arranged on the left steering knuckle assembly or the right steering knuckle assembly, a microphone sensor is arranged near the left front wheel or the right front wheel, and a microphone sensor is arranged on the left side or the right side of the front row cabin. Subsequently, the braking force of the brake system at the time of the first investigation is set to 0. When brake squeal occurs during the running of the automobile, noise data is collected and analyzed by the sensors arranged as described above.
And S2, comparing the acceleration signals at the brake caliper and the steering knuckle when the sensors in the automobile cabin are consistent with the frequency main components of the noise data collected by the sensors near the wheels.
Specifically, under the working condition that brake squeal occurs, the collected noise data is subjected to spectrum analysis, and therefore the main frequency component of the brake squeal is determined.
When the frequency main components of noise data collected by a sensor in the automobile cabin and a sensor near a wheel are consistent, comparing acceleration signals collected by acceleration sensors at a brake caliper and a steering knuckle so as to perform next round of investigation;
when the frequency principal components of the noise data collected by the sensor in the automobile cabin and the sensor near the wheel are inconsistent, the noise is determined to be irrelevant to the braking system, and the positioning is finished.
And S3, when the frequency main components of the acceleration signals collected at the brake calipers and the steering knuckles are consistent and obvious order harmonic components exist, performing brake caliper mode checking, brake disc mode checking and friction plate mode checking, and positioning the brake squeal.
Specifically, according to step S2, it is determined whether the frequency principal components of the acceleration signals collected by the acceleration sensors at the brake caliper and the knuckle are identical and there is a significant order harmonic component.
If the harmonic components are consistent and obvious order harmonic components exist, carrying out mode examination on the brake caliper;
if there is an inconsistency and no significant order harmonic component is present, the cause of brake squeal is identified as the friction lining. In particular, it may be caused by the friction lining surface friction coefficient or the friction lining material. In the optimization, only the friction surface needs to be optimized.
The brake caliper modal investigation specifically comprises: and comparing the origin frequency response functions in the brake calipers and the automobile seat cabin, and searching whether the origin frequency response function of the brake calipers has a main frequency peak value consistent with the frequency main component of the origin frequency response function in the automobile seat cabin. And when the frequency main components of the noise data in the brake caliper and the automobile seat cabin are consistent, performing modal test on the brake caliper in a free state, and judging whether the frequency main components of the modal frequency obtained by the modal test are consistent with the frequency main components in the automobile seat cabin. When the two are consistent, the brake squeal is confirmed to be generated for the brake caliper. And when the frequency main components of the noise data in the brake caliper and the seat cabin and the main components of the modal frequency of the brake caliper are not consistent with the frequency main components in the seat cabin, performing modal checking on the brake disc.
The brake disc modal investigation specifically comprises:
comparing the original point frequency response functions in the brake disc and the automobile cabin, searching whether the main frequency peak value of the original point frequency response function of the brake disc is consistent with the frequency main component of the original point frequency response function in the automobile cabin, if the two are consistent, carrying out modal test on the brake disc in a free state, judging whether the modal frequency of the brake disc is consistent with the frequency main component in the automobile cabin, and judging that the brake squeal caused by the brake disc mode is generated when the two are consistent; and when the frequency main components of the noise data in the brake disc and the seat cabin and the main components of the modal frequency of the brake disc are not consistent with the frequency main components in the automobile seat cabin, performing modal troubleshooting on the friction disc.
The friction plate modal investigation specifically comprises:
and judging whether the main component of the modal frequency obtained by the friction plate through modal testing is consistent with the main component of the frequency in the automobile cabin, and if so, determining that the friction plate generates brake squeal.
If the two are not consistent, the braking force of the braking system is changed, and the steps S1-S3 are repeated for checking. Specifically, the check may be made to change the braking force to 30% braking force. If the reason causing brake squeal cannot be found after the braking force is changed to 30%, changing the braking force to 60% and checking again; if the cause of brake squeal cannot be found even after the braking force is changed to 60%, the braking force is changed to 100% and the checking is performed again. Since the magnitude of the braking force is one of the important factors affecting the generation of the braking noise, four rounds of investigation of 0 braking force, 30% braking force, 60% braking force, and 100% braking force can cover all possible operating conditions. In any round, as long as brake squeal is located successfully, the entire troubleshooting process ends.
Furthermore, it will be understood by those skilled in the art that free mode testing of a component refers to testing with the component disassembled. In addition, other troubleshooting and testing are carried out on the whole vehicle.
Fig. 2 is a block diagram of a fast positioning system for brake squeal according to an embodiment, as shown in fig. 2, the system 2 comprising:
and the data acquisition and processing module 21 is used for acquiring and analyzing noise data through a sensor arranged on a vehicle body when the braking force of the brake system is set and the vehicle is started and the braking squeal of the vehicle occurs.
A brake squeal checking module 22 for comparing acceleration signals at the brake caliper and the knuckle when the frequency principal components of the noise data collected by the sensor in the car cabin and the sensor near the wheel are consistent; when the acceleration signals at the brake calipers and the steering knuckle meet the conditions, caliper mode checking, brake disc mode checking and friction plate mode checking are carried out, and therefore brake squeal is located.
A sensor arrangement module 23 for arranging an acceleration sensor at the left or right front brake caliper housing, an acceleration sensor at the left or right knuckle assembly, a microphone sensor near the left or right front wheel, a microphone sensor at the left or right side of the front row cabin, respectively.
The brake squeal checking module 22 specifically includes:
the caliper mode checking module 221 is configured to perform a mode test on the brake caliper when the frequency main components in the brake caliper and the automobile seat cabin are consistent, determine whether the frequency main components obtained through the mode test are consistent with the frequency main components in the automobile seat cabin, and determine that a brake squeal is generated for the brake caliper when the frequency main components obtained through the mode test are consistent with the frequency main components in the automobile seat cabin.
And the brake disc modal checking module 222 is used for comparing whether the frequency main components in the brake caliper and the car cabin and the frequency main components in the brake caliper and the car cabin are inconsistent, judging whether the modal frequency obtained by performing modal test on the brake disc is consistent with the frequency main components in the car cabin when the frequency main components in the brake caliper and the car cabin are consistent, and confirming that brake squeal is generated for the brake disc when the frequency main components in the brake disc and the car cabin are consistent.
And the friction plate modal troubleshooting module 223 is used for judging whether the main component of the modal frequency obtained by carrying out modal test on the friction plate is consistent with the main component of the frequency in the automobile cabin when the main components of the frequencies in the brake disc and the cabin and the main component of the modal frequency of the brake disc are inconsistent with the main component of the frequency in the automobile cabin, and when the main component of the modal frequency obtained by carrying out modal test on the friction plate is consistent with the main component of the frequency in the automobile cabin, the friction plate is determined to generate brake squeal.
A friction lining checking module 224 for determining that a brake squeal is caused by the friction lining when there is no significant consistent order harmonic component of the acceleration signals at the brake caliper and the knuckle.
A fast positioning system for implementing brake squeal in this embodiment is consistent with the specific implementation process and technical effect of the above method embodiments, and is not described herein again.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for fast location of brake squeal, comprising the steps of:
s1, setting the braking force of the braking system and starting the automobile, and when the automobile generates brake squeal, acquiring and analyzing noise data through a sensor arranged on the automobile body;
s2, comparing acceleration signals collected at a brake caliper and a steering knuckle when the frequency main components of the noise data collected by a sensor in the automobile seat cabin and a sensor near the wheel are consistent;
and S3, when the frequency main components of the acceleration signals collected by the brake calipers and the steering knuckles are consistent and obvious order harmonic components exist, performing brake caliper mode troubleshooting, brake disc mode troubleshooting and friction plate mode troubleshooting, and accordingly positioning brake squeal.
2. The method of claim 1, wherein performing a brake caliper modal review, a brake disc modal review, and a friction pad modal review comprises:
when the frequency main components in the automobile seat cabin are consistent with the frequency main components in the automobile seat cabin, performing modal test on the brake caliper, judging whether the modal frequency main components obtained by the modal test are consistent with the frequency main components in the automobile seat cabin or not, and when the modal frequency main components are consistent with the frequency main components in the automobile seat cabin, determining that brake squeal is caused to the brake caliper;
when the frequency main components in the automobile cabin and the frequency main components in the automobile cabin of the brake caliper are not consistent with each other, comparing whether the frequency main components in the automobile cabin and the brake disc are consistent with each other or not, judging whether the modal frequency obtained by performing modal test on the brake disc is consistent with the frequency main components in the automobile cabin or not when the frequency main components in the automobile cabin and the frequency main components in the brake caliper are consistent with each other, and confirming that brake squeal is caused by the brake disc when the frequency main components in the brake disc and the frequency main components in the automobile cabin are consistent with each other;
when the frequency main components of the brake disc and the automobile cabin and the main components of the modal frequency of the brake disc are not consistent with the frequency main components in the automobile cabin, judging whether the main components of the modal frequency obtained by performing modal testing on the friction disc are consistent with the frequency main components in the automobile cabin or not, and when the main components of the modal frequency obtained by performing modal testing on the friction disc are consistent with the frequency main components in the automobile cabin, determining that the friction disc causes brake squeal;
the frequency main component of the brake caliper is a frequency peak value existing on an origin point frequency response function of the brake caliper; the frequency principal component of the brake disc is the frequency peak existing on the origin frequency response function of the brake disc.
3. The method of claim 2, wherein the determining whether the main component of the modal frequency of the friction plate obtained by the modal test is consistent with the main component of the frequency in the automobile cabin, and when the main component of the modal frequency is consistent with the main component of the frequency in the automobile cabin, the determining that the friction plate causes brake squeal further comprises:
and when the main component of the modal frequency obtained by the friction plate through modal testing is inconsistent with the main component of the frequency in the automobile cabin, changing the braking force of the braking system, and repeating the steps S1-S3.
4. The method of claim 1, further comprising:
when there is no significant consistent order harmonic component of the acceleration signals at the brake caliper and knuckle, it is determined that brake squeal is caused by the friction pads.
5. The method of claim 1, further comprising:
and when the frequency principal components of the noise data collected by the sensor in the automobile seat cabin and the sensor near the wheel are inconsistent, determining that the noise is irrelevant to the braking system, and ending the positioning.
6. The method according to any one of claims 1 to 5, further comprising, before step S1:
an acceleration sensor is arranged on the left front brake caliper shell or the right front brake caliper shell, an acceleration sensor is arranged on the left steering knuckle assembly or the right steering knuckle assembly, a microphone sensor is arranged near the left front wheel or the right front wheel, and a microphone sensor is arranged on the left side or the right side of the front row cabin.
7. A system of a rapid positioning method for brake squeal according to any one of claims 1 to 6, the system comprising:
the data acquisition and processing module is used for setting the braking force of the braking system and starting the automobile, and when the automobile generates brake squeal, acquiring and analyzing noise data through a sensor arranged on the automobile body;
the brake squeal checking module is used for comparing acceleration signals collected by a brake caliper and a steering knuckle when frequency main components of the noise data collected by a sensor in a car seat cabin and a sensor near a wheel are consistent;
and when the frequency main components of the acceleration signals collected by the brake calipers and the steering knuckles are consistent and obvious order harmonic components exist, carrying out caliper mode troubleshooting, brake disc mode troubleshooting and friction plate mode troubleshooting, thereby positioning the brake squeal.
8. The system of claim 7, wherein the brake squeal checking module comprises:
the caliper modal investigation module is used for carrying out modal test on the brake caliper when the frequency main components in the brake caliper and the automobile seat cabin are consistent, judging whether the frequency main components obtained by the modal test are consistent with the frequency main components in the automobile seat cabin or not, and confirming that brake squeal is caused by the brake caliper when the frequency main components obtained by the modal test are consistent with the frequency main components in the automobile seat cabin;
the brake disc modal investigation module is used for comparing whether the frequency main components in the brake caliper and the automobile cabin are consistent or not when the frequency main components in the automobile cabin and the main components of the modal frequency of the brake caliper are inconsistent with the frequency main components in the automobile cabin, judging whether the modal frequency obtained by the brake disc through modal testing is consistent with the frequency main components in the automobile cabin or not when the frequency main components in the brake caliper and the frequency main components in the automobile cabin are consistent, and confirming that brake squeal is caused by the brake disc when the frequency main components in the brake disc and the frequency main components in the automobile cabin are consistent;
the friction plate modal investigation module is used for judging whether the main component of the modal frequency obtained by carrying out modal testing on the friction plate is consistent with the main component of the frequency in the automobile cabin or not when the main components of the frequency in the brake disc and the automobile cabin are inconsistent with the main component of the frequency in the automobile cabin, and when the main component of the modal frequency obtained by carrying out modal testing on the friction plate is consistent with the main component of the frequency in the automobile cabin, determining that the friction plate causes brake squeal;
the frequency main component of the brake caliper is a frequency peak value existing on an origin point frequency response function of the brake caliper; the frequency principal component of the brake disc is the frequency peak existing on the origin frequency response function of the brake disc.
9. The system of claim 7, wherein the brake squeal checking module further comprises:
a friction lining checking module for determining that a brake squeal is caused by the friction lining when there is no significant consistent order harmonic component of the acceleration signals at the brake caliper and the knuckle.
10. The system according to any one of claims 7 to 9, further comprising:
and the sensor arrangement module is used for respectively arranging an acceleration sensor on the left front brake caliper shell or the right front brake caliper shell, arranging an acceleration sensor on the left steering knuckle assembly or the right steering knuckle assembly, arranging a microphone sensor near the left front wheel or the right front wheel and arranging a microphone sensor on the left side or the right side of the front row of cabins.
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| CN201910059329.8A CN109677390B (en) | 2019-01-22 | 2019-01-22 | Rapid positioning method and system for brake squeal |
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| CN110514290B (en) * | 2019-07-16 | 2021-07-06 | 上海尚毅测控技术有限公司 | Brake disc squeaking noise detection method and device |
| CN110456310B (en) * | 2019-08-19 | 2023-03-24 | 武汉理工大学 | System and method for quickly positioning airflow squeaking of exhaust system |
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| CN111693296B (en) * | 2020-06-09 | 2021-07-20 | 安徽江淮汽车集团股份有限公司 | Automobile squeaking checking method, device, equipment and storage medium |
| CN112161700B (en) * | 2020-09-18 | 2022-03-04 | 安徽江淮汽车集团股份有限公司 | Method and device for checking up lifting noise of car window glass |
| CN112857834A (en) * | 2021-02-25 | 2021-05-28 | 浙江航驱汽车科技有限公司 | Method for evaluating running noise of double-pinion type electric power steering gear |
| CN114013410B (en) * | 2021-11-17 | 2023-10-31 | 上海集度汽车有限公司 | Control device, control method, terminal and storage medium for braking system |
| CN116080621B (en) * | 2023-01-19 | 2024-08-20 | 江铃汽车股份有限公司 | Method for evaluating braking noise of light truck type |
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| JPS61731A (en) * | 1984-06-14 | 1986-01-06 | Oki Electric Ind Co Ltd | Light-receiving signal lead-out circuit of 2-dimensional pressure sensitive sensor |
| DE102005023362A1 (en) * | 2005-05-20 | 2006-11-30 | Robert Bosch Gmbh | Vehicle brake for use as e.g. parking brake, has free wheel nut connected to auxiliary piston of blocking installation so that nut rotates around screw when piston is moved in axial direction, where nut has threads in opposite directions |
| CN102062696A (en) * | 2010-12-17 | 2011-05-18 | 湖北三环离合器有限公司 | Multifunctional simulation test bed for auto clutch |
| CN102494900A (en) * | 2011-11-30 | 2012-06-13 | 重庆长安汽车股份有限公司 | Method for evaluating brake high-frequency noise by sharpness |
| CN104535342A (en) * | 2014-12-18 | 2015-04-22 | 西南交通大学 | Test bed for brake noise of high-speed train brake disc |
| JP2018535134A (en) * | 2015-09-17 | 2018-11-29 | アイティーティー・イタリア・エス．アール．エル | Device for analyzing and managing data generated by a vehicle braking system equipped with sensors |
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