CN111412235B - System and method for monitoring abrasion of friction plate of floating brake vehicle - Google Patents
System and method for monitoring abrasion of friction plate of floating brake vehicle Download PDFInfo
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- CN111412235B CN111412235B CN202010192985.8A CN202010192985A CN111412235B CN 111412235 B CN111412235 B CN 111412235B CN 202010192985 A CN202010192985 A CN 202010192985A CN 111412235 B CN111412235 B CN 111412235B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005299 abrasion Methods 0.000 title description 7
- 238000006073 displacement reaction Methods 0.000 claims description 29
- 238000005259 measurement Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
- F16D66/022—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
- F16D66/025—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness sensing the position of parts of the brake system other than the braking members, e.g. limit switches mounted on master cylinders
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Abstract
本申请涉及一种浮动式制动器车辆的摩擦片磨损监测系统及方法，属于汽车制动技术领域，包括：浮动式制动器，其包括卡钳支架和通过销轴定位连接在卡钳支架上的卡钳体，卡钳体和卡钳支架之间设有用于采集卡钳体相对于卡钳支架移动长度的传感器；车身控制器，其与所述传感器连接，车身控制器用于获取所述传感器采集的卡钳体相对于卡钳支架移动长度信息；电子稳定性控制系统，其通过CAN总线与车身控制器连接，所述电子稳定性控制系统用于控制所述浮动式制动器的制动液压。本申请能够根据获取传感器采集的卡钳体相对于卡钳支架移动长度信息，并结合浮动式制动器的设计参数进行运算处理，实现摩擦片磨损程度的间接检测。
The application relates to a friction pad wear monitoring system and method for a floating brake vehicle, belonging to the technical field of automobile braking, including: a floating brake, which includes a caliper bracket and a caliper body positioned and connected to the caliper bracket through a pin shaft, the caliper A sensor for collecting the moving length of the caliper body relative to the caliper support is arranged between the body and the caliper support; the body controller is connected to the sensor, and the body controller is used to obtain the moving length of the caliper body relative to the caliper support collected by the sensor Information; an electronic stability control system, which is connected to the body controller through the CAN bus, the electronic stability control system is used to control the brake hydraulic pressure of the floating brake. The present application can perform calculation processing according to the information of the moving length of the caliper body relative to the caliper bracket collected by the sensor and combined with the design parameters of the floating brake, so as to realize the indirect detection of the wear degree of the friction plate.
Description
Technical Field
The application relates to the technical field of automobile braking, in particular to a system and a method for monitoring wear of a friction plate of a floating brake vehicle.
Background
Brakes are the components in a brake system that generate forces that oppose the motion or tendency of motion of a vehicle, which is generated with automobiles, and have evolved with the development of the automotive industry, from the most primitive shoe type to the drum type, to the disc type brakes.
Disc brakes can be divided into fixed caliper disc brakes and floating caliper disc brakes, wherein the caliper of a floating caliper disc brake is generally designed to slide axially relative to the brake disc. The floating caliper disc brake has a piston on only one side, and when the brake is stepped, the piston pushes the friction plate on one side to the brake disc, and the other side of the caliper moves axially due to the reaction force to press the friction plate on the other side to the brake disc.
However, the friction plate is used as a consumable part of a vehicle braking system, and after the friction plate is worn to a certain degree, the friction plate needs to be replaced to ensure driving safety, but the friction plate is replaced too early, so that the utilization degree of the friction plate is low, resources are wasted, and the vehicle using cost of a user is increased. In order to alarm after the friction plate is worn to a certain degree, the alarm is mainly given out through a mechanical alarm plate on the friction plate at the present stage, although the mode is low in cost, drivers with insufficient experience can not perceive the mode, and therefore the scheme that the wear degree of the friction plate can be checked by adopting electronic alarm has obvious application value on the whole vehicle.
The electronic alarm mode is flexible and various, for example, the resistors are arranged in parallel in the thickness direction of the friction plate, alarm is carried out along with the abrasion of the friction plate, and the abrasion degree can be displayed in real time. There is also a research on the method of using friction plate to wear and then pushing the push rod to trigger the switch element to give an electronic alarm. The existing scheme basically depends on the structural design of the friction plate to perform electronic alarm, the electronic alarm cannot be reused, the use cost is obviously increased, the requirement on the friction plate after sale is high, and the friction plate is not matched during use and is easy to cause safety risk.
Disclosure of Invention
The embodiment of the application provides a friction plate wear monitoring system and method of a floating caliper brake vehicle, and aims to overcome the defects that electronic alarm is often carried out depending on the structural design of the friction plate in the prior art, the electronic alarm cannot be reused, and the use cost is obviously increased.
In a first aspect of the present application, there is provided a friction plate wear monitoring system for a floating brake vehicle, comprising:
the brake comprises a floating brake and a brake disc, wherein the floating brake comprises a caliper support and a caliper body which is positioned and connected to the caliper support through a pin shaft, a sensor used for acquiring the moving length of the caliper body relative to the caliper support is arranged between the caliper body and the caliper support, and an inner friction plate and an outer friction plate used for clamping a brake disc are arranged on the caliper body;
the automobile body controller is connected with the sensor and used for acquiring the movement length information of the caliper body relative to the caliper support, which is acquired by the sensor, and configuring the movement length information of the caliper body relative to the caliper support into the residual thickness of the inner friction plate and the residual thickness of the outer friction plate;
the electronic stability control system is connected with the vehicle body controller through a CAN bus and used for controlling the brake hydraulic pressure of the floating brake, and when the brake hydraulic pressure of the floating brake reaches a set threshold value, the electronic stability control system triggers the vehicle body controller through the CAN bus to acquire the information of the moving length of the caliper body relative to the caliper support, which is acquired by the sensor;
the automobile body controller configures the moving length information of the caliper body relative to the caliper support into the remaining thickness of the inner friction plate and the remaining thickness of the outer friction plate, and specifically comprises the following steps:
and the difference value between the distance from the original point position of the sensor to the outer side surface of the outer friction plate and the distance from the measuring point position of the sensor to the contact surface of the outer friction plate and the brake disc is subtracted, then the moving length of the caliper body relative to the caliper support and the thickness of the back plate of the outer friction plate are subtracted, and finally the residual thickness of the inner friction plate and the residual thickness of the outer friction plate are obtained.
In some embodiments, the caliper body is provided with a piston body for pushing the inner friction plate and the outer friction plate to move towards the brake disc, the inner friction plate is connected with the extending end of the piston body, the sensor is a linear displacement sensor, one end of the linear displacement sensor is connected to the piston body, and the other end of the linear displacement sensor is connected with the caliper bracket.
In some embodiments, the linear displacement sensor includes a housing and a connecting rod located in the housing, the connecting rod linearly extends and retracts inside the housing, a movement direction of the connecting rod is parallel to an axis of the pin shaft, the housing is fixedly connected to an outer wall of the piston body through a sensor support, a bolt for fixedly mounting the housing on the sensor support is arranged on the sensor support, and a free end of the connecting rod is movably connected to the caliper support through a universal joint.
In some embodiments, the vehicle body controller is connected with an instrument through a CAN bus, the vehicle body controller acquires the length information of the movement of the caliper body relative to the caliper support, which is acquired by the sensor, and records the current mileage of the instrument, and the instrument acquires and displays the remaining thickness of the inner friction plate and the remaining thickness of the outer friction plate, which are detected by the vehicle body controller, through the CAN bus.
In some embodiments, when the vehicle body controller detects that the residual thickness of the inner friction plate and the residual thickness of the outer friction plate are smaller than 2mm, the vehicle body controller sends an alarm instruction to the instrument through the CAN bus, and the instrument receives the alarm instruction of the vehicle body controller and performs alarm display.
In a second aspect of the present application, there is provided a method of a friction plate wear monitoring system for a floating brake vehicle, the method comprising the steps of:
taking off a new vehicle or replacing a friction plate;
the electronic stability control system controls the brake hydraulic pressure of the floating brake to reach a set threshold value through the piston body;
the electronic stability control system triggers a vehicle body controller through a CAN bus to acquire and record the initial thicknesses of the outer friction plate and the inner friction plate by using a sensor, and records the current meter mileage;
the vehicle body controller judges whether the friction plate is replaced, if so, the initial step is carried out, and if not, the next step is carried out;
the vehicle body controller judges whether the distance between the current meter mileage and the last meter mileage of the vehicle reaches a set mileage threshold value, if so, the next step is carried out, and if not, the previous step is carried out;
the electronic stability control system controls the brake hydraulic pressure of the floating brake to reach a set threshold value through the piston body again;
the vehicle body controller obtains the length information of the movement of the caliper body relative to the caliper support, which is acquired by the sensor, configures the length information of the movement of the caliper body relative to the caliper support into the remaining thickness of the inner friction plate and the remaining thickness of the outer friction plate, and records the current meter mileage.
In some embodiments, when the remaining thickness of the inner friction plate and the remaining thickness of the outer friction plate are judged to be less than 2mm after the remaining thickness of the inner friction plate and the remaining thickness of the outer friction plate are obtained by the vehicle body controller, the vehicle body controller sends an alarm instruction to the instrument through the CAN bus;
the instrument obtains and displays the residual thickness of the inner friction plate and the residual thickness of the outer friction plate detected by the automobile body controller through the CAN bus, and the instrument receives an alarm instruction of the automobile body controller and performs alarm display.
In some embodiments, the vehicle body controller configures the length information of the movement of the caliper body relative to the caliper bracket as the remaining thickness of the inner friction plate and the remaining thickness of the outer friction plate, specifically:
and the difference value between the distance from the original point position of the sensor to the outer side surface of the outer friction plate and the distance from the measuring point position of the sensor to the contact surface of the outer friction plate and the brake disc is subtracted, then the moving length of the caliper body relative to the caliper support and the thickness of the back plate of the outer friction plate are subtracted, and finally the residual thickness of the inner friction plate and the residual thickness of the outer friction plate are obtained.
In some embodiments, the thickness of the brake disc has wear during friction between the brake disc and the inner and outer friction plates, and the distance between the measuring point of the sensor and the contact surface of the outer friction plate and the brake disc is reduced by the single-sided wear thickness of the brake disc.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a friction plate wear monitoring system and method of a floating brake vehicle, the friction plate wear monitoring system is provided with a floating brake, a vehicle body controller and an electronic stability control system, the floating brake is provided with a sensor for acquiring the moving length of a caliper body relative to a caliper support, and the vehicle body controller utilizes the moving length information of the caliper body relative to the caliper support acquired by the sensor and configures the remaining thickness of an inner friction plate and the remaining thickness of an outer friction plate through operation according to the design size parameters of the floating brake. And when the brake hydraulic pressure of the floating brake reaches a set threshold value, the electronic stability control system triggers the vehicle body controller to acquire the moving length information of the caliper body relative to the caliper support, which is acquired by the sensor, through the CAN bus.
Therefore, the automobile body controller of the friction plate wear monitoring system can carry out operation processing according to the movement length information of the caliper body relative to the caliper support, which is acquired by the acquisition sensor, and the design parameters of the floating brake, so that the indirect detection of the wear degree of the friction plate is realized. And the wear degree of the friction plate is electronically displayed and the wear limit alarm is carried out, the internal structure design of the friction plate is not needed, the friction plate can be repeatedly used after being replaced, and the cost can be reduced. In addition, because different areas on the surface of the friction plate have eccentric wear, the electronic stability control system is used for measuring after the braking hydraulic pressure reaches a set threshold value, the real contact state of the friction plate can be represented, and the measurement precision of the residual thickness of the friction plate is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, 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 schematic structural diagram of a floating brake according to an embodiment of the present application;
FIG. 2 is a schematic size diagram of an inner friction plate and an outer friction plate of a floating brake according to an embodiment of the present application before wear;
FIG. 3 is a schematic diagram showing the dimensions of the inner and outer friction plates of the floating brake of the embodiment of the present application after they have worn;
FIG. 4 is a block diagram of a system according to an embodiment of the present application;
FIG. 5 is a flow chart of a method according to an embodiment of the present application.
Reference numerals:
1-sensor wiring harness, 2-sensor support, 3-bolt, 4-sensor, 5-caliper support, 6-inner friction plate, 7-outer friction plate, 8-caliper body and 9-pin shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
The embodiment of the application provides a friction plate wear monitoring system and method of a floating brake vehicle, which can solve the problems that electronic alarm is often carried out by relying on the structural design of the friction plate in the prior art, the reuse cannot be realized, and the use cost is obviously increased.
Referring to fig. 1 and 4, a first aspect of an embodiment of the present application provides a friction plate wear monitoring system of a floating brake vehicle, including:
the floating brake comprises a caliper support 5 and a caliper body 8 which is positioned and connected to the caliper support 5 through a pin shaft 9, wherein the caliper body 8 linearly reciprocates on the caliper support 5 along the axis direction of the pin shaft 9. A sensor 4 for detecting the length of the displacement of the caliper body 8 relative to the caliper support 5 is arranged between the caliper body 8 and the caliper support 5, and the sensor 4 is used for detecting the length of the displacement of the caliper body 8 on the caliper support 5 during braking. The caliper body 8 is provided with an inner friction plate 6 and an outer friction plate 7 for clamping the brake disc 10, and the caliper body 8 pushes the inner friction plate 6 and the outer friction plate 7 to move towards the brake disc 10 during braking.
A Body Controller (BCM), also called a body computer (body computer), electrically connected to the sensor 1, the body controller being configured to obtain the length information of the caliper body 5 relative to the caliper support 8, which is acquired by the sensor 4, and configure the length information of the caliper body 8 relative to the caliper support 5 as the remaining thickness of the inner friction plate 6 and the remaining thickness of the outer friction plate 7.
The Electronic Stability Control system (ESC for short) is connected with the vehicle body controller through a CAN bus and used for controlling the brake hydraulic pressure of the floating brake, and when the brake hydraulic pressure of the floating brake reaches a set threshold value, the Electronic Stability Control system triggers the vehicle body controller through the CAN bus to acquire the movement length information of the caliper body, collected by the sensor, relative to the caliper support.
Principle of operation
The embodiment of the application provides a friction plate wear monitoring system of a floating brake vehicle, and the friction plate wear monitoring system is provided with a floating brake, a vehicle body controller and an electronic stability control system, wherein the floating brake is provided with a sensor 4 for acquiring the moving length of a caliper body 8 relative to a caliper support 5, and the vehicle body controller utilizes the moving length information of the caliper body 8 relative to the caliper support 5 acquired by the sensor 4 and configures the remaining thickness of an inner friction plate 6 and the remaining thickness of an outer friction plate 7 through operation according to the design size parameters of the floating brake. When the brake hydraulic pressure of the floating brake reaches a set threshold value, the electronic stability control system triggers the vehicle body controller to acquire the information of the moving length of the caliper body 8 relative to the caliper support 5, which is acquired by the sensor 4, through the CAN bus.
The automobile body controller of the friction plate wear monitoring system can carry out operation processing according to the movement length information of the caliper body 8 acquired by the acquisition sensor 4 relative to the caliper support 5 and by combining with the design size parameters of the floating brake, thereby realizing indirect detection of the wear degree of the friction plate. The inner structure design of the friction plate is not needed, the friction plate can be repeatedly used after being replaced, and the cost can be reduced. In addition, because different areas on the surface of the friction plate have eccentric wear, the electronic stability control system is used for measuring after the braking hydraulic pressure reaches a set threshold value, the real contact state of the friction plate can be represented, and the measurement precision of the residual thickness of the friction plate is improved.
In some alternative embodiments, referring to fig. 1, the friction plate wear monitoring system of a floating brake vehicle according to the embodiments of the present application is provided with a piston body on a caliper body 8 for pushing an inner friction plate 6 and an outer friction plate 7 to move toward a brake disc 10, the piston body is a hydraulic piston body, and the inner friction plate 6 is connected with a piston protruding end of the piston body. The sensor 4 is preferably, but not limited to, a linear displacement sensor, one end of which is connected to the piston body 8 and the other end of which is connected to the caliper bracket 5.
Specifically, the linear displacement sensor includes a housing and a link rod positioned in the housing, and a sensor harness 1 connected to the vehicle body controller is provided on the housing. The connecting rod linearly extends and retracts in the shell, the moving direction of the connecting rod is parallel to the axis of the pin shaft 9, and the connecting rod moves along the axial direction of the pin shaft 9 to measure linear displacement; the casing passes through sensor support 2 fixed connection on the outer wall of piston body, and the outer wall of sensor support 2 and piston body is the integrated into one piece structure. The sensor support 2 is provided with a bolt 3 fixedly mounting the shell on the sensor support 2, the free end of the connecting rod is movably connected to the caliper support 5 through a universal joint, and when the length information of the caliper body 8 moving relative to the caliper support 5 is measured, the caliper body 8 drives the connecting rod to move to a set position along the axial direction of the pin shaft 9 and stop, and then the moving length of the caliper body 8 relative to the caliper support 5 can be measured.
In some optional embodiments, referring to fig. 4, the friction plate wear monitoring system of a floating brake vehicle according to the embodiments of the present application is connected to a meter through a CAN bus, the vehicle body controller obtains the length information of the movement of the caliper body 8 relative to the caliper support 5, which is collected by the linear displacement sensor, and records the current mileage of the meter, and the meter obtains and displays the remaining thickness of the inner friction plate 6 and the remaining thickness of the outer friction plate 7, which are detected by the vehicle body controller, through the CAN bus.
In order to monitor the remaining thickness of the friction plates of the floating brakes of the four wheels of the vehicle in a comprehensive manner, a linear displacement sensor numbered 1 is disposed in the floating brake on the right front side of the vehicle, a linear displacement sensor numbered 2 is disposed in the floating brake on the left front side of the vehicle, a linear displacement sensor numbered 3 is disposed in the floating brake on the right rear side of the vehicle, and a linear displacement sensor numbered 4 is disposed in the floating brake on the left rear side of the vehicle. And the linear displacement sensors numbered 1, 2, 3 and 4 are all connected with the vehicle body controller.
When the automobile body controller detects that the residual thickness of the inner friction plate and the residual thickness of the outer friction plate are smaller than 2mm, the automobile body controller sends an alarm instruction to the instrument through the CAN bus, and the instrument receives the alarm instruction of the automobile body controller and performs alarm display. When the automobile body controller detects that the residual thickness of the inner friction plate and the residual thickness of the outer friction plate are larger than 2mm, the automobile body controller judges that an alarm instruction does not need to be sent to the instrument through the CAN bus.
In some alternative embodiments, referring to fig. 2 and 3, the friction plate wear monitoring system of a floating brake vehicle of the application embodiment, the vehicle body controller configures the length information of the movement of the caliper body 8 relative to the caliper bracket 5 as the remaining thickness of the inner friction plate 6 and the remaining thickness of the outer friction plate 7, specifically:
the point O is the original point position of the linear displacement sensor, the distance between the point O and the outer side surface of the outer friction plate 7 is L1, the length of the point L1 depends on the design size of the floating brake and the installation position of the linear displacement sensor, and the length of the point L1 is a fixed value. The back plate thickness of the outer friction plate 7 is b. The relative assembling position of the caliper support 5 and the brake disc 10 is unchanged, the distance from the measuring point A of the linear displacement sensor on the caliper support 5 to the contact surface of the brake disc 10 and the outer friction plate 7 is L2, L2 is only related to the abrasion of the brake disc 10, and the distance from the measuring point A of the sensor O is a measured by the linear displacement sensor.
The automobile body controller calculates the difference between the distance L1 from the point O to the outer side surface of the outer friction plate 7 and the distance L2 from the measuring point position of the linear displacement sensor to the contact surface of the outer friction plate and the brake disc, then subtracts the moving length a of the caliper body 8 relative to the caliper bracket 5 and the thickness b of the back plate of the outer friction plate 7, and finally obtains the residual thickness of the inner friction plate 6 and the residual thickness of the outer friction plate 7 (namely L1-L2-a-b).
Since the remaining thicknesses of the inner and outer friction plates 6, 8 are in a gradually decreasing changing state, the moving length a of the caliper body 8 relative to the caliper support 5 is also in a changing state, for example, the moving length a of the caliper body 8 relative to the caliper support 5 is a before the inner and outer friction plates 6, 7 are worn0The thickness of the inner 6 and outer 7 friction plates is delta0Inner friction plate and outer friction plateThe length of the movement of the caliper body 8 relative to the caliper bracket 5 after the abrasion of the wiping piece is a1The thickness of the inner 6 and outer 7 friction plates is delta1。
In some alternative embodiments, referring to fig. 2 and 3, the friction plate wear monitoring system of the floating brake vehicle of the application embodiment, during the interaction of the brake disc 10 with the inner friction plate 6 and the outer friction plate 7, the brake disc 10 is gradually worn, and the wear data of the brake disc 10 along with mileage is obtained according to a bench test and a whole vehicle test in the engineering.
When the vehicle body controller calculates the pad wear thickness, the brake disc 10 wear data is compensated, and the one-side wear thickness β of the brake disc 10 is compensated by L2, so that L2 becomes L2' + β. Thereby obtaining a more accurate residual thickness (i.e., L1-L2-a-b- β) of the inner friction plate 6 and the outer friction plate 7.
In some alternative embodiments, referring to fig. 2 and 3, the friction plate wear monitoring system of the floating brake vehicle of the application embodiment has the wear degree of the inner friction plate 6 and the outer friction plate 7 which are relatively consistent theoretically, but the statistical data in the whole vehicle endurance test shows that the inner friction plate 6 is worn faster than the outer friction plate 7 and is normally maintained in a small range.
The method introduces the eccentric wear limit thickness alpha of the inner friction plate 6 and the outer friction plate 7 to calculate the material thickness of the inner friction plate 6 and the outer friction plate 7, wherein the eccentric wear limit thickness alpha can be calibrated according to a real vehicle test. When the vehicle body controller carries out operation processing on the wear thickness of the friction plate, the residual thickness of the inner friction plate 6 is accurately calculated by (L1-L2-a-b-beta-alpha).
Referring to fig. 1-5, a second aspect of an embodiment of the present application provides a method of a friction plate wear monitoring system of a floating brake vehicle, the method comprising the steps of:
step 1, taking off a new vehicle or replacing a friction plate.
And 2, controlling the brake hydraulic pressure of the floating brake to reach a set threshold value by the electronic stability control system through the piston body, outputting the hydraulic pressure to the main cylinder of the piston body by the electronic stability control system to reach 1MPa so as to ensure that the inner friction plate 6 and the outer friction plate 7 are in a clamping state with the brake disc 10, and not regulating the pressure by the electronic stability control system.
And 3, triggering the vehicle body controller by the electronic stability control system through the CAN bus, acquiring and recording the initial thicknesses of the outer friction plate 6 and the inner friction plate 7 by using the sensor 4, and recording the current meter mileage.
And 4, judging whether the friction plate is replaced or not by the automobile body controller, if so, entering the step 1, and otherwise, entering the next step.
And 5, judging whether the distance between the current meter mileage of the vehicle and the last meter mileage of the vehicle reaches a set mileage threshold value, wherein the mileage threshold value is preferably 100Km, if so, entering the next step, and if not, entering the step 4.
And 6, controlling the brake hydraulic pressure of the floating brake to reach a set threshold value through the piston body again by the electronic stability control system, outputting the hydraulic pressure to the main cylinder of the piston body to reach 1MPa by the electronic stability control system so as to ensure that the inner friction plate 6 and the outer friction plate 7 are in a clamping state with the brake disc 10, and not regulating the pressure by the electronic stability control system.
And 7, the vehicle body controller acquires the movement length information of the caliper body 8 relative to the caliper support 5, which is acquired by the sensor 4, configures the movement length information of the caliper body 8 relative to the caliper support 5 into the residual thickness of the inner friction plate 6 and the residual thickness of the outer friction plate 7, and records the current meter mileage.
And 8, the vehicle body controller acquires the residual thickness of the inner friction plate 6 and the residual thickness of the outer friction plate 7 and then judges whether the residual thickness of the inner friction plate 6 and the residual thickness of the outer friction plate 7 are smaller than 2mm or not, if so, the vehicle body controller sends an alarm instruction to the instrument through the CAN bus, and if not, the vehicle body controller does not send the alarm instruction.
And 9, acquiring and displaying the residual thickness of the inner friction plate 6 and the residual thickness of the outer friction plate 7 detected by the automobile body controller through the CAN bus by the instrument, and receiving an alarm instruction of the automobile body controller and alarming and displaying by the instrument.
In some alternative embodiments, the present application provides a method of a friction plate wear monitoring system of a floating brake vehicle, in which a vehicle body controller configures the caliper body movement length information with respect to a caliper bracket as a remaining thickness of an inner friction plate and a remaining thickness of an outer friction plate, specifically:
the point O is the original point position of the linear displacement sensor, the distance between the point O and the outer side surface of the outer friction plate 7 is L1, the length of the point L1 depends on the design size of the floating brake and the installation position of the linear displacement sensor, and the length of the point L1 is a fixed value. The back plate thickness of the outer friction plate 7 is b. The relative assembling position of the caliper support 5 and the brake disc 10 is unchanged, the distance from the measuring point A of the linear displacement sensor on the caliper support 5 to the contact surface of the brake disc 10 and the outer friction plate 7 is L2, L2 is only related to the abrasion of the brake disc 10, and the distance from the measuring point A of the sensor O is a measured by the linear displacement sensor.
The automobile body controller calculates the difference between the distance L1 from the point O to the outer side surface of the outer friction plate 7 and the distance L2 from the measuring point position of the linear displacement sensor to the contact surface of the outer friction plate and the brake disc, then subtracts the moving length a of the caliper body 8 relative to the caliper bracket 5 and the thickness b of the back plate of the outer friction plate 7, and finally obtains the residual thickness of the inner friction plate 6 and the residual thickness of the outer friction plate 7 (namely L1-L2-a-b).
Since the remaining thicknesses of the inner and outer friction plates 6, 8 are in a state of gradually decreasing change, the length a of the caliper body 8 moving relative to the caliper support 5 is also in a state of changing, for example, the length a of the caliper body 8 moving relative to the caliper support 5 before the inner and outer friction plates 6, 7 are worn is a0The thickness of the inner 6 and outer 7 friction plates is delta0. After the inner friction plate 6 and the outer friction plate 7 are worn, the caliper body 8 moves a length a relative to the caliper support 51The thickness of the inner 6 and outer 7 friction plates is delta1。
In some alternative embodiments, the present application provides a method of a friction pad wear monitoring system for a floating brake vehicle, wherein the thickness of a brake disc 10 has wear during friction between the brake disc 10 and inner and outer pads 6, 7, and the distance L2 from the measurement point of the sensor 4 to the contact surface of the outer pad 7 and the brake disc 10 is subtracted by the single-sided wear thickness β of the brake disc. And acquiring wear data of the brake disc 10 along with mileage according to a bench test and a whole vehicle test in the engineering.
When the vehicle body controller calculates the pad wear thickness, the brake disc 10 wear data is compensated, and the brake disc 10 one-side wear thickness β is compensated for L2, so that L2 becomes L2' + β. Thereby obtaining a more accurate residual thickness (i.e., L1-L2-a-b- β) of the inner friction plate 6 and the outer friction plate 7.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
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| CN112664594B (en) * | 2020-12-18 | 2025-06-24 | 常州机电职业技术学院 | A caliper assembly with friction plate wear monitoring function and wear alarm, vibration detection and brake failure compensation method thereof |
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