CN115891957A - Evaluation method for vehicle braking abnormal sound - Google Patents
Evaluation method for vehicle braking abnormal sound Download PDFInfo
- Publication number
- CN115891957A CN115891957A CN202211466997.0A CN202211466997A CN115891957A CN 115891957 A CN115891957 A CN 115891957A CN 202211466997 A CN202211466997 A CN 202211466997A CN 115891957 A CN115891957 A CN 115891957A
- Authority
- CN
- China
- Prior art keywords
- vehicle
- preset
- brake
- braking
- running
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002159 abnormal effect Effects 0.000 title claims abstract description 64
- 238000011156 evaluation Methods 0.000 title description 11
- 238000000034 method Methods 0.000 claims abstract description 53
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000012854 evaluation process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Regulating Braking Force (AREA)
Abstract
The invention discloses a method for evaluating vehicle brake abnormal sound, which comprises the following steps: s10, after the driving gear of the vehicle is switched from a reverse gear to a forward gear, controlling the vehicle to brake at a preset brake pressure in a first running mode; s20, after the driving gear of the vehicle is switched from the forward gear to the reverse gear, controlling the vehicle to brake at a preset brake pressure in a second operation mode, and acquiring knocking data of a friction plate and a brake caliper in a brake system of the vehicle; s30, adjusting the preset brake pressure by preset increment, and returning to execute S10-S20 until the preset brake pressure reaches the upper limit of the brake pressure; and S40, determining the abnormal braking sound state of the vehicle according to the knocking data acquired under different braking pressures. According to the technical scheme, abnormal knocking sound can be found out in time when the vehicle is braked for the first time after the front and the back of the vehicle are reversed, a user is prevented from being aware of the abnormal knocking sound, and the comfort level of the user when the user uses the vehicle is improved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method for evaluating vehicle braking abnormal sound.
Background
With the increasing popularization of automobile products, users have higher requirements on riding comfort, wherein the requirements on NVH (Noise, vibration, harshness) performance in the vehicle braking process are higher, and various braking abnormal sounds not only affect the riding comfort of the users, but also affect brand public praise.
When the vehicle runs, a gap exists between the friction plate and the brake inlay, so that the friction plate and the brake caliper are easy to knock when the vehicle is braked for the first time in the running process after front and back reversing, a crisp sound is generated, and the sound is easy to be perceived by a user. Therefore, whether the friction plate and the brake caliper generate knocking abnormal sound or not during the first braking in the driving process of the vehicle after the front and back reversing can be predicted by detecting the abnormal sound condition of the vehicle after the front and back reversing.
Disclosure of Invention
The invention provides an evaluation method for vehicle braking abnormal sound, which is used for timely finding out knocking abnormal sound when a vehicle is braked for the first time after front and back reversing, preventing a user from perceiving the knocking abnormal sound and improving the comfort level of the user when the user uses the vehicle.
The invention provides a method for evaluating vehicle brake abnormal sound, which comprises the following steps:
s10, after a driving gear of a vehicle is switched from a reverse gear to a forward gear, controlling the vehicle to brake at a preset brake pressure in a first running mode;
s20, after the driving gear of the vehicle is switched from a forward gear to a reverse gear, controlling the vehicle to brake at the preset brake pressure in a second running mode, and acquiring knocking data of a friction plate and a brake caliper in a brake system of the vehicle;
s30, adjusting the preset brake pressure by a preset increment, and returning to execute S10-S20 until the preset brake pressure reaches the upper limit of the brake pressure;
and S40, determining the state of the abnormal braking sound of the vehicle according to the knocking data acquired under different braking pressures.
Optionally, after S20 and before S30, the method further includes:
acquiring the switching times of a driving gear of the vehicle from a forward gear to a reverse gear;
judging whether the switching times reach preset switching times or not;
if yes, executing S30;
otherwise, returning to execute S10-S20.
Optionally, the first operation mode is: and the speed of the vehicle is increased to the running mode of the first preset speed within the first preset time.
Optionally, the second operation mode is: and the speed of the vehicle is increased to the running mode of the second preset speed within the second preset time.
Optionally, before S10, the method further includes:
and controlling the vehicle to brake after the vehicle runs for a preset distance at a reverse gear.
Optionally, before S10, the method further includes:
controlling the vehicle to carry out running-in braking under a preset running-in condition, and acquiring the current running-in times;
judging whether the running-in times are larger than preset running-in times or not;
if so, stopping the running-in brake of the vehicle;
if not, returning to the step of executing the control vehicle to preset running-in conditions, carrying out running-in braking, and acquiring the current running-in times.
Optionally, before the step of controlling the vehicle to perform running-in braking under the preset running-in condition and obtaining the current running-in times is executed, the method further includes:
acquiring the temperature of a front brake disc and the temperature of a rear brake disc of the vehicle brake system;
judging whether the temperature of the front brake disc and/or the temperature of the rear brake disc are/is greater than a preset temperature;
if not, returning to the step of executing the control vehicle to carry out running-in braking under the preset running-in condition and acquiring the current running-in times;
if so, returning to the step of acquiring the temperature of the front brake disc and the temperature of the rear brake disc of the vehicle in a preset period until the temperature of the front brake disc and the temperature of the rear brake disc reach the current room temperature.
Optionally, the preset running-in condition includes: the vehicle was braked from 100km/h to 30km/h at a deceleration of 0.2g, while maintaining a fixed brake pressure.
Optionally, when the steps S10 to S40 are executed, the window of the vehicle is controlled to be in a closed state.
Optionally, the window of the vehicle is switched from a closed state to an open state, and the steps from S10 to S40 are continuously executed.
According to the technical scheme, after the driving gear of the vehicle is switched from the reverse gear to the forward gear, the vehicle is controlled to brake at the preset brake pressure in the first operation mode, after the driving gear of the vehicle is switched from the forward gear to the reverse gear, the vehicle is controlled to brake at the preset brake pressure in the second operation mode, the knocking data of a friction plate and a brake caliper in a brake system of the vehicle is obtained, then the preset brake pressure is adjusted by the preset increment, after the driving gear of the vehicle is switched from the reverse gear to the forward gear, the knocking data of the friction plate and the brake caliper in the brake system of the vehicle are obtained again, the vehicle is controlled to brake at the preset brake pressure in the first operation mode, after the driving gear of the vehicle is switched from the forward gear to the reverse gear, the vehicle is controlled to brake at the preset brake pressure in the second operation mode, the knocking data of the friction plate and the brake caliper in the brake system of the vehicle are determined, and the abnormal sound state of the vehicle can be found timely when the vehicle is braked for the first time after the front-back gear is switched, the user is prevented from making abnormal sound, and the user feels that the vehicle uses the knocking data when the vehicle.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for evaluating a vehicle braking abnormal sound according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for evaluating a vehicle braking abnormal sound according to a second embodiment of the present invention;
fig. 3 is a flowchart of a method for evaluating vehicle braking abnormal sound according to a third embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Fig. 1 is a flowchart of a method for evaluating a vehicle braking abnormal sound according to an embodiment of the present invention, and referring to fig. 1, the embodiment of the present invention provides a method for evaluating a vehicle braking abnormal sound, including:
and S10, after the driving gear of the vehicle is switched from a reverse gear to a forward gear, controlling the vehicle to brake at a preset brake pressure in a first operation mode, and acquiring knocking data of a friction plate and a brake caliper in a brake system of the vehicle.
Optionally, the first operation mode is an operation mode that the vehicle speed of the vehicle is increased to a first preset vehicle speed within a first preset time. The first preset time may be a preset period of time, the first preset vehicle speed may be a preset vehicle speed, and the specific values of the first preset time and the first preset vehicle speed are not limited in any way in the embodiment of the present invention, as long as the core invention point of the embodiment of the present invention can be realized. For example, the first operating mode may be a rise in vehicle speed to 20km/h within 2 s.
The preset brake pressure may be a preset relative pressure between a friction plate and a brake caliper in a brake system when the vehicle is braked, and may be 10bar, 20bar or 30bar, for example. It should be noted that, in the embodiment of the present invention, a specific value of the preset brake pressure is not limited at all, as long as the core invention point of the embodiment of the present invention can be realized. The method comprises the steps that knocking data of a friction plate and a brake caliper in a braking system of a vehicle can be acquired through a sensor, and for example, sound intensity and sound waveform of the friction plate and the brake caliper in the braking system of the vehicle can be acquired through a sound sensor, so that the knocking data of the friction plate and the brake caliper in the braking system of the vehicle can be analyzed; or vibration conditions of a friction plate and a brake caliper in a braking system of the vehicle can be acquired through a vibration sensor, so that knocking data of the friction plate and the brake caliper in the braking system of the vehicle can be acquired; in other embodiments, knocking data of a friction plate and a brake caliper in a braking system of a vehicle can be acquired through a decibel meter; the embodiment of the invention does not limit the mode of acquiring knocking data of a friction plate and a brake caliper in a braking system of a vehicle.
And S20, after the driving gear of the vehicle is switched from the forward gear to the reverse gear, controlling the vehicle to brake at a preset brake pressure in a second operation mode, and acquiring knocking data of a friction plate and a brake caliper in a brake system of the vehicle.
Optionally, the second operation mode is: and the speed of the vehicle is increased to the running mode of the second preset speed within the second preset time. The second operation mode may be the same as the first operation mode, or may be different from the first operation mode; the second preset time may be a preset period of time, the second preset vehicle speed may be a preset vehicle speed, and the specific values of the second preset time and the second preset vehicle speed are not limited in any way in the embodiment of the present invention, as long as the core invention point of the embodiment of the present invention can be realized. For example, the second operation mode may be that the vehicle speed of the vehicle is increased to 20km/h within 2 s.
And S30, adjusting the preset brake pressure by preset increment, and returning to execute S10-S20 until the preset brake pressure reaches the upper limit of the brake pressure.
The preset increment may be a preset value for adjusting the preset brake pressure with a certain gradient, and in an exemplary embodiment, the preset increment may be 10bar; in another exemplary embodiment, the preset increment may be 5bar; the numerical value of the preset increment is not limited in any way in the embodiment of the present invention, as long as the core invention point of the embodiment of the present invention can be realized. The upper limit of the brake pressure may be a preset upper limit of the brake pressure, or may be a maximum brake pressure that can be achieved by a friction plate and a brake caliper in a brake system of the vehicle when the vehicle is braked.
Specifically, when the vehicle needs to evaluate the state of abnormal braking sound, after the driving gear of the vehicle is switched from a reverse gear to a forward gear, the vehicle is controlled to brake under a first preset mode at a preset brake pressure, and knocking data of a friction plate and a brake caliper in a brake system of the vehicle is acquired in the braking process; then, after a driving gear of the vehicle is switched from a forward gear to a reverse gear, the vehicle is controlled to brake under a second preset mode at a preset brake pressure, and knocking data of a friction plate and a brake caliper in a brake system of the vehicle is acquired in the braking process; and after the driving gear of the vehicle is switched from the forward gear to the reverse gear, the vehicle is controlled to brake at the preset brake pressure in a second preset mode, and the knocking data of the friction plate and the brake caliper in the braking system of the vehicle is obtained in the braking process until the preset brake pressure reaches the upper limit of the brake pressure.
In an example embodiment, by taking the first preset mode and the second preset mode as examples that the vehicle speed of the vehicle is increased to 20km/h within 2s, the preset brake pressure is 10bar, the preset increment is 10bar, and the upper limit of the brake pressure is 30bar, when the vehicle needs to evaluate the abnormal brake sound state, after the driving gear of the vehicle is switched from the reverse gear to the forward gear, the speed of the vehicle is controlled to be increased to 20km/h within 2s, then the vehicle is braked by the 10bar brake pressure, in the braking process, knocking data of a friction plate and a brake caliper in a brake system of the vehicle is obtained, then the driving gear of the vehicle is switched from the forward gear to the reverse gear, the speed of the vehicle is controlled to be increased to 20km/h within 2s, then the vehicle is braked by the 10bar brake pressure, and in the braking process, knocking data of the friction plate and the brake caliper in the brake system of the vehicle is obtained; after the driving gear of the vehicle is switched from the reverse gear to the forward gear again, controlling the speed of the vehicle to be increased to 20km/h within 2s, then braking the vehicle with a braking pressure of 20bar, acquiring knocking data of a friction plate and a brake caliper in a braking system of the vehicle in the braking process, then controlling the speed of the vehicle to be increased to 20km/h within 2s after the driving gear of the vehicle is switched from the forward gear to the reverse gear, braking the vehicle with the braking pressure of 20bar, and acquiring the knocking data of the friction plate and the brake caliper in the braking system of the vehicle in the braking process; and finally, after the driving gear of the vehicle is switched from a reverse gear to a forward gear, controlling the speed of the vehicle to be increased to 20km/h within 2s, then braking the vehicle at a braking pressure of 30bar, acquiring knocking data of a friction plate and a brake caliper in a braking system of the vehicle in the braking process, then controlling the speed of the vehicle to be increased to 20km/h within 2s after the driving gear of the vehicle is switched from the forward gear to the reverse gear, braking the vehicle at a braking pressure of 30bar, and acquiring the knocking data of the friction plate and the brake caliper in the braking system of the vehicle in the braking process.
And S40, determining the abnormal braking sound state of the vehicle according to the knocking data acquired under different braking pressures.
The abnormal braking sound state of the vehicle can comprise an abnormal sound state and an abnormal sound-free state. When the knocking abnormal sound exists at least once in the knocking data acquired under different brake pressures, the vehicle can be determined to have the braking abnormal sound, and when the knocking abnormal sound does not exist in the knocking data acquired under different brake pressures, the vehicle can be determined to have no braking abnormal sound.
In an optional embodiment, when the evaluation method of the vehicle brake abnormal sound is executed, the window of the vehicle is controlled to be in a closed state; in another optional embodiment, after the vehicle window is controlled to be in a closed state and the vehicle braking abnormal sound evaluation method is executed, the vehicle window is switched from the closed state to the open state, and the vehicle braking abnormal sound evaluation method is continuously executed, so that the vehicle braking abnormal sound conditions under the vehicle window closing state and the vehicle window opening state can be evaluated, the vehicle braking abnormal sound under the state that a user really drives is simulated, and the accuracy of evaluating the vehicle braking abnormal sound is improved.
In the embodiment, after the driving gear of the vehicle is switched from the reverse gear to the forward gear, the vehicle is controlled to brake at the preset brake pressure in the first operation mode, and after the driving gear of the vehicle is switched from the forward gear to the reverse gear, the vehicle is controlled to brake at the preset brake pressure in the second operation mode, the knocking data of a friction plate and a brake caliper in a brake system of the vehicle is obtained, then the preset brake pressure is adjusted by the preset increment, the knocking data of the friction plate and the brake caliper in the brake system of the vehicle is obtained again after the driving gear of the vehicle is switched from the reverse gear to the forward gear, the vehicle is controlled to brake at the preset brake pressure in the first operation mode, and after the driving gear of the vehicle is switched from the forward gear to the reverse gear, the knocking data of the friction plate and the brake caliper in the brake system of the vehicle is controlled to brake at the preset brake pressure in the second operation mode, so that the abnormal braking state of the vehicle is determined according to the knocking data obtained under different brake pressures.
Example two
Fig. 2 is a flowchart of a method for evaluating a vehicle braking abnormal sound according to a second embodiment of the present invention. On the basis of the embodiment, the embodiment of the invention further adds the steps of judging whether the switching times reach the preset switching times after S20 and before S30, and controlling the vehicle to brake after the vehicle is driven by the preset distance in the reverse gear position before S10. Referring to fig. 2, the method specifically includes:
and S01, controlling the vehicle to brake after the vehicle runs for a preset distance at a reverse gear position.
The preset distance may be a preset distance. Before the evaluation of the abnormal braking sound of the vehicle, the vehicle runs for a preset distance at a reverse gear, and then the vehicle is controlled to brake, so that the evaluation of the abnormal braking sound of the vehicle is guaranteed to be whether knocking abnormal sound occurs between a friction plate and a brake caliper when the vehicle brakes for the first time in the running process after front and back reversing.
And S10, after the driving gear of the vehicle is switched from the reverse gear to the forward gear, controlling the vehicle to brake at a preset brake pressure in a first running mode, and acquiring knocking data of a friction plate and a brake caliper in a braking system of the vehicle.
And S20, after the driving gear of the vehicle is switched from the forward gear to the reverse gear, controlling the vehicle to brake at a preset brake pressure in a second operation mode, and acquiring knocking data of a friction plate and a brake caliper in a brake system of the vehicle.
And S21, acquiring the switching times of the driving gear of the vehicle from the forward gear to the reverse gear.
S22, judging whether the switching frequency reaches a preset switching frequency or not; if yes, executing S30; otherwise, returning to execute S10-S20.
The preset switching frequency may be a switching frequency of switching a driving gear of the vehicle from a forward gear to a reverse gear in a preset braking abnormal sound evaluation process of the vehicle, and the preset switching frequency may be 3 times.
Specifically, in the process of evaluating the abnormal braking sound of the vehicle, the switching frequency of the driving gear of the vehicle from the forward gear to the reverse gear is obtained, if the switching frequency does not reach the preset switching frequency, the driving gear of the vehicle is continuously switched from the reverse gear to the forward gear, the vehicle is controlled to brake at the preset brake pressure in a first preset mode, and knocking data of a friction plate and a brake caliper in a brake system of the vehicle is obtained in the braking process; and then, after the driving gear of the vehicle is switched from the forward gear to the reverse gear, controlling the vehicle to brake at a preset brake pressure in a second preset mode, and acquiring knocking data of a friction plate and a brake caliper in a brake system of the vehicle in the braking process until the switching times reach the preset switching times. When the switching times reach the preset switching times, after the preset brake pressure is adjusted by the preset increment, the driving gear of the vehicle is continuously switched from the reverse gear to the forward gear, the vehicle is controlled to brake at the preset brake pressure in a first preset mode, and knocking data of a friction plate and a brake caliper in a brake system of the vehicle is obtained in the braking process; and then, after the driving gear of the vehicle is switched from the forward gear to the reverse gear, controlling the vehicle to brake at a preset brake pressure in a second preset mode, and acquiring knocking data of a friction plate and a brake caliper in a brake system of the vehicle in the braking process.
And S30, adjusting the preset brake pressure by preset increment, and returning to execute S10-S20 until the preset brake pressure reaches the upper limit of the brake pressure.
And S40, determining the abnormal braking sound state of the vehicle according to the knocking data acquired under different braking pressures.
In the embodiment, before the evaluation of the abnormal braking sound of the vehicle, the vehicle is firstly driven by a preset distance in a reverse gear, and then the vehicle is controlled to brake, so that the abnormal braking sound of the vehicle is evaluated to determine whether the friction plate and the brake caliper generate abnormal knocking sound or not when the vehicle is braked for the first time in the driving process after the front and the back of the vehicle are reversed; when the switching times of the driving gears of the vehicle from the forward gears to the reverse gears reach the preset switching times, the preset brake pressure is adjusted by the preset increment, so that the error of knocking data of a friction plate and a brake caliper in a brake system of the vehicle is reduced in the braking process, the accuracy of evaluating the abnormal braking sound of the vehicle is improved, the abnormal knocking sound of a user is prevented, and the comfort level of the user when the user uses the vehicle is improved.
EXAMPLE III
Fig. 3 is a flowchart of a method for evaluating vehicle braking abnormal sound according to a third embodiment of the present invention. The present embodiment further adds a step of controlling the vehicle to perform break-in braking before S10 on the basis of the above-described embodiment. Referring to fig. 3, the method specifically includes:
and S001, controlling the vehicle to perform running-in braking under a preset running-in condition, and acquiring the current running-in times.
In an alternative embodiment, the preset break-in condition comprises braking the vehicle from 100km/h to 30km/h at a deceleration of 0.2g while maintaining a fixed brake pressure. Wherein the 0.2g deceleration is 0.2 times the gravitational acceleration.
S002, judging whether the running-in times are larger than preset running-in times or not; if yes, executing S003; if not, returning to execute S001.
The preset running-in times can be times of running-in braking of a preset vehicle under preset running-in conditions, and exemplarily, the preset running-in times can be 50 times.
Specifically, before the evaluation of the abnormal braking sound of the vehicle, the vehicle is controlled to brake the vehicle from 100km/h to 30km/h at a deceleration of 0.2g under the condition of keeping fixed brake pressure, the current running-in times are obtained, if the brake times are less than or equal to the preset running-in times, the vehicle is continuously controlled to carry out running-in brake under the preset running-in condition, the current running-in times are obtained, and when the brake times are more than the preset running-in times, the running-in of the vehicle is stopped.
In an optional embodiment, before returning to execute S001, the method further includes: acquiring the temperature of a front brake disc and the temperature of a rear brake disc of a vehicle brake system; judging whether the temperature of the front brake disc and/or the temperature of the rear brake disc are/is greater than a preset temperature; if so, returning to the step of obtaining the temperature of the front brake disc and the temperature of the rear brake disc of the vehicle in a preset period until the temperature of the front brake disc and the temperature of the rear brake disc reach the current room temperature; if not, returning to execute S001.
The preset temperature may be lower than an upper temperature limit at which the front brake disc and the rear brake disc of the vehicle brake system may normally operate. The preset period may be a preset period of time, for example, the preset period may be set to 5min, and the temperature of the front brake disc and the temperature of the rear brake disc of the vehicle are acquired every 5min until the last acquired temperature of the front brake disc and the last acquired temperature of the rear brake disc of the vehicle braking system both reach the current room temperature.
Specifically, when the braking frequency is less than or equal to the preset running-in frequency, the temperature of a front brake disc and the temperature of a rear brake disc of a vehicle braking system are firstly obtained, if the temperature of the front brake disc and the temperature of the rear brake disc of the vehicle braking system are less than or equal to the preset temperatures, the vehicle is continuously controlled to carry out running-in braking under the preset running-in condition, and the current running-in frequency is obtained; when the temperature of a front brake disc and the temperature of a rear brake disc of the vehicle brake system are larger than preset temperatures, the temperature of the front brake disc and the temperature of the rear brake disc of the vehicle are returned and obtained in a preset period until the temperature of the front brake disc and the temperature of the rear brake disc reach the current room temperature, and then the vehicle is continuously controlled to carry out running-in braking under preset running-in conditions, and the current running-in times are obtained.
And S003, stopping running-in braking of the vehicle.
And S01, controlling the vehicle to brake after the vehicle runs for a preset distance in a reverse gear.
And S10, after the driving gear of the vehicle is switched from the reverse gear to the forward gear, controlling the vehicle to brake at a preset brake pressure in a first running mode, and acquiring knocking data of a friction plate and a brake caliper in a braking system of the vehicle.
And S20, after the driving gear of the vehicle is switched from the forward gear to the reverse gear, controlling the vehicle to brake at a preset brake pressure in a second operation mode, and acquiring knocking data of a friction plate and a brake caliper in a brake system of the vehicle.
And S21, acquiring the switching times of the driving gear of the vehicle from the forward gear to the reverse gear.
S22, judging whether the switching frequency reaches a preset switching frequency or not; if yes, executing S30; otherwise, returning to execute S10-S20.
And S30, adjusting the preset brake pressure by preset increment, and returning to execute S10-S20 until the preset brake pressure reaches the upper limit of the brake pressure.
And S40, determining the abnormal braking sound state of the vehicle according to the knocking data acquired under different braking pressures.
In the embodiment, before the abnormal braking sound evaluation of the vehicle, the vehicle is controlled to perform running-in braking under the preset running-in condition, and the running-in braking on the quality is stopped after the preset running-in times are reached, so that the contact area of the brake pad and the brake disc reaches the optimal contact area, and the braking performance is improved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for evaluating a vehicle braking abnormal sound, characterized by comprising:
s10, after a driving gear of a vehicle is switched from a reverse gear to a forward gear, controlling the vehicle to brake at a preset brake pressure in a first running mode, and acquiring knocking data of a friction plate and a brake caliper in a braking system of the vehicle;
s20, after the driving gear of the vehicle is switched from a forward gear to a reverse gear, controlling the vehicle to brake at the preset brake pressure in a second operation mode, and acquiring knocking data of a friction plate and a brake caliper in a brake system of the vehicle;
s30, adjusting the preset brake pressure by a preset increment, and returning to execute S10-S20 until the preset brake pressure reaches the upper limit of the brake pressure;
and S40, determining the state of the abnormal braking sound of the vehicle according to the knocking data acquired under different braking pressures.
2. The method of evaluating a vehicle braking abnormal sound according to claim 1, further comprising, after S20 and before S30:
acquiring the switching times of the driving gear of the vehicle from a forward gear to a reverse gear;
judging whether the switching times reach preset switching times or not;
if yes, executing S30;
otherwise, returning to execute S10-S20.
3. The method for evaluating a vehicle braking abnormal sound according to claim 1, wherein the first operation mode is: and the speed of the vehicle is increased to the running mode of the first preset speed within the first preset time.
4. The method for evaluating a vehicle braking abnormal sound according to claim 1, wherein the second operation mode is: and the speed of the vehicle is increased to the running mode of the second preset speed within the second preset time.
5. The method for evaluating a vehicle braking abnormal sound according to claim 1, further comprising, before S10:
and controlling the vehicle to brake after the vehicle runs for a preset distance at a reverse gear.
6. The method for evaluating a vehicle braking abnormal sound according to claim 1, further comprising, before S10:
controlling the vehicle to carry out running-in braking under a preset running-in condition, and acquiring the current running-in times;
judging whether the running-in times are larger than preset running-in times or not;
if so, stopping running-in braking of the vehicle;
if not, returning to the step of executing the control vehicle to preset running-in conditions, carrying out running-in braking, and acquiring the current running-in times.
7. The method for evaluating the vehicle brake abnormal sound according to claim 6, wherein before the step of controlling the vehicle to run in under the preset running-in condition, performing running-in braking and acquiring the current running-in times, the method further comprises the following steps:
acquiring the temperature of a front brake disc and the temperature of a rear brake disc of the vehicle brake system;
judging whether the temperature of the front brake disc and/or the temperature of the rear brake disc are/is greater than a preset temperature;
if not, returning to the step of executing the control vehicle to carry out running-in braking under the preset running-in condition and acquiring the current running-in times;
if so, returning to the step of acquiring the temperature of the front brake disc and the temperature of the rear brake disc of the vehicle in a preset period until the temperature of the front brake disc and the temperature of the rear brake disc reach the current room temperature.
8. The method for evaluating a vehicle braking abnormal sound according to claim 6, wherein the preset running-in condition includes: the vehicle was braked from 100km/h to 30km/h at a deceleration of 0.2g, while maintaining a fixed brake pressure.
9. The method for evaluating a brake noise of a vehicle according to claim 1, wherein the window of the vehicle is controlled to be in a closed state when the steps of S10 to S40 are performed.
10. The method according to claim 9, wherein the window of the vehicle is switched from a closed state to an open state, and the steps S10 to S40 are continuously performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211466997.0A CN115891957A (en) | 2022-11-22 | 2022-11-22 | Evaluation method for vehicle braking abnormal sound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211466997.0A CN115891957A (en) | 2022-11-22 | 2022-11-22 | Evaluation method for vehicle braking abnormal sound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115891957A true CN115891957A (en) | 2023-04-04 |
Family
ID=86489110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211466997.0A Pending CN115891957A (en) | 2022-11-22 | 2022-11-22 | Evaluation method for vehicle braking abnormal sound |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115891957A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| DE102011002924A1 (en) * | 2011-01-20 | 2012-07-26 | Robert Bosch Gmbh | Method for recognizing brake disk stroke of motor car, involves determining whether oscillation arising in sensor signal satisfies predetermined condition, and producing signal when condition is satisfied |
| CN112304639A (en) * | 2020-10-30 | 2021-02-02 | 重庆长安汽车股份有限公司 | Vehicle BTV (vehicle to vehicle) complete vehicle testing method |
| JP2021091262A (en) * | 2019-12-09 | 2021-06-17 | 株式会社アドヴィックス | Vehicle control device |
| CN114486287A (en) * | 2022-01-27 | 2022-05-13 | 奇瑞商用车（安徽）有限公司 | Test and evaluation method for vehicle brake noise |
| CN115031982A (en) * | 2022-04-13 | 2022-09-09 | 江铃汽车股份有限公司 | Automobile brake jitter analysis and evaluation method |
| CN115112224A (en) * | 2022-05-16 | 2022-09-27 | 中国第一汽车股份有限公司 | Test method for low-ringing noise of passenger vehicle brake |
-
2022
- 2022-11-22 CN CN202211466997.0A patent/CN115891957A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011002924A1 (en) * | 2011-01-20 | 2012-07-26 | Robert Bosch Gmbh | Method for recognizing brake disk stroke of motor car, involves determining whether oscillation arising in sensor signal satisfies predetermined condition, and producing signal when condition is satisfied |
| 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 |
| JP2021091262A (en) * | 2019-12-09 | 2021-06-17 | 株式会社アドヴィックス | Vehicle control device |
| CN112304639A (en) * | 2020-10-30 | 2021-02-02 | 重庆长安汽车股份有限公司 | Vehicle BTV (vehicle to vehicle) complete vehicle testing method |
| CN114486287A (en) * | 2022-01-27 | 2022-05-13 | 奇瑞商用车（安徽）有限公司 | Test and evaluation method for vehicle brake noise |
| CN115031982A (en) * | 2022-04-13 | 2022-09-09 | 江铃汽车股份有限公司 | Automobile brake jitter analysis and evaluation method |
| CN115112224A (en) * | 2022-05-16 | 2022-09-27 | 中国第一汽车股份有限公司 | Test method for low-ringing noise of passenger vehicle brake |
Non-Patent Citations (2)
| Title |
|---|
| 常庆斌;浦新宇;***;张光荣;: "摩擦片偏磨引起制动低鸣噪声控制研究", 噪声与振动控制, no. 01, 18 February 2017 (2017-02-18) * |
| 武素荣;费康;李亚;: "轿车制动器制动撞击噪音影响因素简析", 汽车实用技术, no. 08, 30 April 2019 (2019-04-30) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9902377B2 (en) | Method for controlling braking force of brake according to velocity | |
| US20060202555A1 (en) | Noise-reduced vehicle brake system | |
| JP6928681B2 (en) | How to suppress brake noise, central server, vehicle control module and storage medium | |
| JP2004197951A (en) | Method for judging state of brake | |
| US11834025B2 (en) | Device and method for determining at least one brake characteristic value of a hydraulic braking system of a vehicle | |
| CN113928285B (en) | Method for reducing drag torque of brake | |
| US20180043867A1 (en) | Performance electric parking brake controllers | |
| JPH10217924A (en) | Control method for brake device and device therefor | |
| CN111619359A (en) | Control method for recovering vehicle braking energy, vehicle control unit and vehicle | |
| CN110520338A (en) | The brake control of vehicle | |
| CN115891957A (en) | Evaluation method for vehicle braking abnormal sound | |
| CN112959988A (en) | Automatic parking function activation method, automobile and computer-readable storage medium | |
| GB2321681A (en) | Electronic braking system for vehicles | |
| US20100280724A1 (en) | Methods and systems for calibrating braking systems and controlling braking in vehicles | |
| JP4239624B2 (en) | Brake noise control device for vehicle | |
| CN114572179A (en) | Method, device and equipment for detecting abrasion of automatic friction plate of vehicle and storage medium | |
| CN112339757B (en) | Regeneration coordination braking control method for reducing eccentric wear of friction plate | |
| US5577580A (en) | Safety system in a motor vehicle equipped with an automatic transmission | |
| ATE528186T1 (en) | ANTI-LOCK BRAKE SYSTEM, ESPECIALLY FOR OFF-ROAD VEHICLES | |
| JP4041331B2 (en) | Method of monitoring the service life of ceramic brake discs in automobiles | |
| JP4935659B2 (en) | Braking force control device | |
| JP4916446B2 (en) | Method and apparatus for switching brake assist function to operable state | |
| US9821781B1 (en) | Methods and apparatus to control braking of a vehicle during low deceleration operations | |
| CN110514290B (en) | Brake disc squeaking noise detection method and device | |
| JP2020185984A (en) | Determination of brake pedal characteristic curve for brake system of vehicle with regeneration brake |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |