CN113983093A - System and method for monitoring wear of friction plate of floating caliper disc brake - Google Patents
System and method for monitoring wear of friction plate of floating caliper disc brake Download PDFInfo
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- CN113983093A CN113983093A CN202111343243.1A CN202111343243A CN113983093A CN 113983093 A CN113983093 A CN 113983093A CN 202111343243 A CN202111343243 A CN 202111343243A CN 113983093 A CN113983093 A CN 113983093A
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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
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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
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Abstract
The application relates to a system and a method for monitoring wear of a friction plate of a floating caliper disc brake. Each floating caliper disc brake comprises a caliper body bracket and a brake caliper body, wherein an inner friction plate and an outer friction plate are arranged on the brake caliper body, and the brake caliper body can make telescopic motion relative to the caliper body bracket and drive the inner friction plate and the outer friction plate to clamp a brake disc. This friction disc wear monitoring system includes: the detection device is connected to the floating caliper disc brake in a matched mode and used for monitoring the total wear rate of the inner friction plate and the outer friction plate on any one floating caliper disc brake in the vehicle and the wear rate of the inner friction plate; and the controller is in communication connection with the detection device and is used for acquiring the difference value of the wear amounts of the inner and outer friction plates according to the total wear amount and the wear amount of the inner friction plate and determining the fault type of the friction plate according to the comparison between the difference value of the wear amounts and a preset wear threshold value. The friction plate wear monitoring system can determine various fault types of the friction plate according to the comparison between the wear loss difference value and the preset wear threshold value, so that the driving hidden danger is reduced.
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 caliper disc brake.
Background
Brakes are components for generating forces which counteract the movement or the tendency of movement of the vehicle, which are generated with the motor vehicle, and have evolved with the development of the motor vehicle industry, from the most primitive shoe type to the drum type, to the disc brake.
The disc brake can be divided into a fixed caliper disc type and a floating caliper disc type. Wherein, the caliper of the floating caliper disc brake can 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 on, 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, so that the brake is generated.
The friction plate is a consumable part, and the friction plate needs to be replaced after being worn to a certain degree 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. However, the current friction plate wear monitoring system has limited fault type detection, and the driving safety is seriously influenced.
Disclosure of Invention
Therefore, it is necessary to provide a friction plate wear monitoring system and a friction plate wear monitoring method of a floating caliper disc brake capable of prompting various faults of a vehicle to ensure driving safety, aiming at the problem that the current friction plate wear monitoring system has limited fault type detection and seriously affects driving safety.
According to one aspect of the application, a system for monitoring wear of friction plates of floating caliper disc brakes is provided, each floating caliper disc brake comprises a caliper bracket and a brake caliper body, an inner friction plate and an outer friction plate are arranged on the brake caliper body, and the brake caliper body can move telescopically relative to the caliper bracket and drive the inner friction plate and the outer friction plate to clamp a brake disc; the method comprises the following steps:
the detection device is connected to the floating caliper disc brake in a matched mode and used for monitoring the total wear rate of inner and outer friction plates and the wear rate of the inner friction plate on any one floating caliper disc brake in a vehicle; and
and the controller is in communication connection with the detection device and is used for acquiring a difference value of the wear amounts of the inner and outer friction plates according to the total wear amount and the wear amount of the inner friction plate and determining the fault type of the friction plate according to the comparison between the difference value of the wear amounts and a preset wear threshold value.
In one embodiment, the preset wear threshold comprises a first failure threshold and a second failure threshold;
when the wear capacity difference value is greater than or equal to the first fault threshold value and less than or equal to the second fault threshold value, the controller determines that the fault type of the friction plate is eccentric wear of the friction plate;
and when the wear loss difference is larger than the second fault threshold value, the controller determines that the fault type of the friction plate is that the friction plate is broken.
In one embodiment, the controller is further configured to obtain a remaining wear amount of the inner and outer friction plates according to a difference between an initial thickness of the friction plates of the inner and outer friction plates and the total wear amount, and determine the fault type of the friction plates as friction plate wear according to a comparison between the remaining wear amount and a preset wear threshold.
In one embodiment, the preset wear threshold further includes a third failure threshold, where the third failure threshold includes an early warning threshold and an alarm threshold;
when the residual abrasion loss is larger than the alarm threshold value and smaller than or equal to the early warning threshold value, the controller generates friction plate abrasion reminding information;
and when the residual abrasion loss difference value is less than or equal to the alarm threshold value, the controller generates friction plate replacement reminding information.
In one embodiment, the controller is further configured to acquire a historical reference voltage of a previous friction plate after a new friction plate is replaced, and generate a brake disc replacement reminding message when a difference between the historical reference voltage and the reference voltage of the new friction plate is greater than or equal to a set reference threshold.
In one embodiment, when the residual wear amount of one of the two coaxially arranged floating caliper disc brakes is smaller than or equal to the alarm threshold, the controller obtains the minimum residual wear amount of the two floating caliper disc brakes on the other shaft adjacent to the controller, and calculates the difference between the residual wear amounts of the two floating caliper disc brakes;
and the controller is also used for generating replacement reminding information of inner and outer friction plates in all the floating caliper disc brakes on the adjacent two shafts when the difference value is smaller than the shaft end difference threshold value.
In one embodiment, the controller is further configured to obtain vehicle mileage information, calculate an average value of wear amounts of the entire vehicle friction plates for obtaining a certain threshold mileage value, and obtain the remaining distance that can be traveled according to the average value of the remaining wear amounts and the wear amounts of the entire vehicle friction plates.
In one embodiment, the controller is further configured to control the detection device to start after the number of braking times of the vehicle reaches a set threshold value after the vehicle is started, the vehicle speed is greater than the threshold vehicle speed, and the vehicle runs for a preset time.
According to another aspect of the present application, there is also provided a friction plate wear monitoring method of a floating caliper disc brake, including:
monitoring the total wear rate of an inner friction plate and an outer friction plate on any floating caliper disc brake in a vehicle and the wear rate of the inner friction plate;
and acquiring a difference value of the wear amounts of the inner friction plate and the outer friction plate according to the total wear amounts of the inner friction plate and the outer friction plate and the wear amount of the inner friction plate, and determining the fault type of the friction plate according to the comparison of the difference value of the wear amounts and a preset wear threshold value.
In one embodiment, the preset wear threshold comprises a first failure threshold and a second failure threshold; the method comprises the following steps of obtaining the difference value of the abrasion loss of the inner friction plate and the outer friction plate according to the total abrasion loss of the inner friction plate and the outer friction plate and the abrasion loss of the inner friction plate, and determining the fault type of the friction plate according to the comparison of the difference value of the abrasion loss and a preset abrasion threshold value:
when the abrasion loss difference value is greater than or equal to the first fault threshold value and less than or equal to the second fault threshold value, determining that the fault type of the friction plate is eccentric wear of the friction plate;
and when the wear loss difference is larger than the second fault threshold value, the fault type of the friction plate is that the friction plate is broken.
In one embodiment, the friction plate wear monitoring method further comprises:
and obtaining the residual abrasion loss of the inner friction plate and the outer friction plate according to the difference between the initial thickness of the friction plate and the total abrasion loss, and determining the fault type of the friction plate as friction plate abrasion according to the comparison between the residual abrasion loss and a preset abrasion threshold value.
In one embodiment, the preset wear threshold further includes a third failure threshold, where the third failure threshold includes an early warning threshold and an alarm threshold;
when the residual abrasion loss is larger than the alarm threshold value and smaller than or equal to the early warning threshold value, friction plate abrasion reminding information is generated;
and when the residual abrasion loss difference value is less than or equal to the alarm threshold value, generating friction plate replacement reminding information.
In one embodiment, the friction plate wear monitoring method further comprises:
and after a new friction plate is replaced, acquiring the historical reference voltage of the previous friction plate, and generating brake disc replacement reminding information when the difference value between the historical reference voltage and the reference voltage of the new friction plate is greater than or equal to a set reference threshold value.
In one embodiment, the friction plate wear monitoring method further comprises:
when the residual abrasion loss of one of the two coaxially arranged floating caliper disc brakes is smaller than or equal to the alarm threshold value, acquiring the minimum residual abrasion loss of the two floating caliper disc brakes on the other shaft adjacent to the same, and calculating to obtain the difference value of the residual abrasion losses of the two floating caliper disc brakes;
and when the difference value is smaller than the shaft end difference threshold value, the replacement information of the inner friction plate and the outer friction plate in all the floating caliper disc brakes on the adjacent two shafts is generated.
In one embodiment, the friction plate wear monitoring method further comprises:
the method comprises the steps of obtaining vehicle driving mileage information, calculating an average value of the wear loss of a whole vehicle friction plate with a certain threshold mileage value, and obtaining the residual distance according to the residual wear loss and the average value of the wear loss of the whole vehicle friction plate.
In one embodiment, before monitoring the total wear amount of the inner friction plate and the outer friction plate and the wear amount of the inner friction plate on any floating caliper disc brake in the vehicle, the method further comprises the following steps:
after the vehicle is started, the braking frequency reaches a set threshold value, the vehicle speed is greater than the threshold value, and the vehicle runs for a preset time.
According to the friction plate wear monitoring system of the floating caliper disc brake, the total wear amount of the inner friction plate and the total wear amount of the outer friction plate and the wear amount of the inner friction plate are detected firstly, so that the wear amount of the outer friction plate is obtained. And then, the difference is made between the abrasion loss of the inner friction plate and the abrasion loss of the outer friction plate to obtain the abrasion loss difference value of the inner membrane friction plate. And then, according to the comparison between the wear loss difference value and a preset wear threshold value, various fault types of the friction plate can be determined, so that the driving safety is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a friction plate wear monitoring system of a floating caliper disc brake according to an embodiment of the present application;
FIG. 2 is a schematic flow chart illustrating a method for detecting wear of a friction plate according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a process of determining an eccentric wear failure of a friction plate according to an embodiment of the present application;
fig. 4 is a schematic diagram of a friction plate dropping fault determination process in an embodiment of the present application;
FIG. 5 is a schematic diagram illustrating a wear failure warning process of a friction plate according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a friction plate wear failure alarm process in an embodiment of the present application;
FIG. 7 is a flowchart illustrating a remaining range calculation process for a vehicle according to an embodiment of the present disclosure.
100. A friction plate wear monitoring system; 10. a detection device; 20. a controller; 30. a gateway; 40. an information management unit; 50. a combination meter; 200. floating caliper disc brake.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The present invention will be described with reference to the accompanying drawings. For the purpose of illustration, only the structures described in connection with the present application are illustrated in the drawings.
Each floating caliper disc brake 200 on the vehicle comprises a caliper bracket and a brake caliper body, wherein an inner friction plate and an outer friction plate are arranged on the brake caliper body, and the brake caliper body can make telescopic motion relative to the caliper bracket and drive the inner friction plate and the outer friction plate to clamp a brake disc so as to generate braking force.
Specifically, the floating caliper disc brake 200 includes a caliper bracket fixedly connected to the axle housing and a caliper body positioned and connected to the caliper bracket by a main sliding pin and an auxiliary sliding pin, and an inner friction plate and an outer friction plate are disposed between the caliper body and the brake disc.
The present application discloses a friction plate wear monitoring system 100 of a floating caliper disc brake 200, which includes a detection device 10 and a controller 20.
The detecting device 10 is coupled to the floating caliper disc brake 200, and is used for monitoring the total wear amount of the inner and outer friction plates and the wear amount of the inner friction plate on any one floating caliper disc brake 200 in the vehicle.
In particular to some embodiments, the detection device 10 includes a primary sensor and a secondary sensor attached to the caliper main slide pin and the secondary slide pin for monitoring the length of movement of the caliper body relative to the caliper body carrier. The main sensor monitors the total abrasion loss of the inner friction plate and the outer friction plate, and the auxiliary sensor monitors the abrasion loss of the inner friction plate.
The controller 20 is in communication connection with the detection device 10, and is configured to obtain a difference between wear amounts of the inner and outer friction plates according to the total wear amount and the wear amount of the inner friction plate, and determine a fault type of the friction plate according to a comparison between the difference between the wear amounts and a preset wear threshold.
Specifically, in some embodiments, the controller 20 is connected to the main sensor and the sub sensor through a wire harness, and is configured to analyze the extension and retraction dimensions of the caliper relative to the caliper bracket, calculate thickness data of the inner and outer friction plates, determine states (including fault information) of the inner and outer friction plates, and send the data and the states of the friction plates to the information management unit 40 and the in-vehicle instrument through the gateway 30. Through the comparison of the abrasion loss difference value and the preset abrasion threshold value, various fault types of the friction plate can be determined, the hidden danger of driving is reduced, and therefore the driving safety is guaranteed.
The gateway 30 is connected to the controller 20 through a wire harness, and is configured to forward data of the inner and outer friction plates and states of the inner and outer friction plates obtained through operation by the controller 20 to the information management unit 40 and the instrument, so as to remind a driver of replacement and facilitate the driver to check related faults.
The information management unit 40 is connected with the gateway 30 through a CAN bus, and the information management unit 40 receives data sent by the gateway 30, so that a driver CAN check the thickness of the inner side and the outer side of the real-time friction plate, the remaining running mileage, the eccentric wear, the block falling and other faults.
The controller 20 has a filtering function. The controller 20 should have a filtering function for the signals collected by the detection device 10, and mainly filter out the signals exceeding the normal values collected by the sensors, and do not perform calculation.
The controller 20 has a delay function. Due to the characteristics of the resistance sensor, the sensor characteristics are nonlinear in a low-temperature state, and in order to ensure the accuracy of data and avoid large data jumping fluctuation, a time threshold needs to be set before the processed sensor data is sent to the gateway 30.
The controller 20 has a memory function. Each time the vehicle switches from the off-range to the on-range, the controller 20 is in the activated state, and the controller 20 transmits the friction plate data (history) before the last parking stall state to the gateway 30 and forwards the data to the meter and information management unit 40, while satisfying the above-described delay function.
Further, the preset wear threshold includes a first failure threshold and a second failure threshold. When the wear amount difference is equal to or greater than the first failure threshold value and equal to or less than the second failure threshold value, the controller 20 determines that the failure type of the friction plate is eccentric wear of the friction plate. When the wear amount difference is greater than the second failure threshold value, the controller 20 determines the failure type of the friction plate as a friction plate slip.
In some embodiments, if the controller 20 receives the calculated wear x of the inner and outer friction plates of a particular wheel1、x2When the first fault threshold is ≦ x1-x2The second failure threshold value is less than or equal to | the data result obtained by the calculation is received by the controller 20 and circularly judged for 50 times, the controller 20 sends an eccentric wear signal and friction plate data to the instrument and information management unit 40 through the gateway 30, and the information management unit 40 displays: the friction plate of the braking system is eccentric.
If the control receives the calculated abrasion loss x of the inner friction plate and the outer friction plate of a certain wheel1、x2，|x1-x2If greater than the second failure threshold, the controller 20 receives the calculated data result and circularly judges the data result for 50 times, the controller 20 sends the block falling signal and the friction plate data to the instrument and information management unit 40 through the gateway 30, and the instrument displays: the friction plate of the braking system falls off.
Further, the controller 20 is further configured to obtain the remaining wear amount of the inner and outer friction plates according to the difference between the initial thickness of the friction plates and the total wear amount of the inner and outer friction plates, and determine the fault type of the friction plate as friction plate wear according to the comparison between the remaining wear amount and the preset wear threshold. When the friction plate has a friction plate abrasion failure, the friction plate needs to be replaced.
The preset wear threshold further comprises a third fault threshold, and the third fault threshold comprises an early warning threshold and an alarm threshold. When the remaining wear amount is greater than the warning threshold value and less than or equal to the warning threshold value, the controller 20 generates friction plate wear reminding information. When the remaining wear amount difference is less than or equal to the alarm threshold, the controller 20 generates a friction plate replacement reminding message.
Specifically, in actual application, a difference x (remaining wear amount) between the friction plate data and the theoretical thickness of the vehicle friction plate at the time is calculated, and if x is found to be larger than a friction plate early warning threshold (preferably, 16.67% of the total friction plate thickness), the friction plate data is sent to the information management unit 40 only through the gateway 30. If the friction plate alarm threshold (preferably 10% of the total friction plate thickness) < x is less than or equal to the early warning threshold, the controller 20 receives the calculated data result, circularly judges the number of times of braking greater than a certain threshold (preferably 50 times), and then sends the early warning signal and the friction plate data to the instrument and information management unit 40 through the gateway 30, the instrument displays the corresponding early warning signal to remind a driver of paying attention to check the state of the friction plate, and the information management unit 40 can check the real-time friction plate data of each wheel.
Further, if the data difference x is larger than the alarm threshold value, entering a last judgment program; if the data difference x is not greater than the alarm threshold value, the controller 20 receives the calculated data result and circularly judges the data result for 50 times, the controller 20 sends an alarm signal and friction plate data to the instrument and information management unit 40 through the gateway 30, the instrument displays a corresponding alarm signal to remind a driver of replacing the friction plate in time, the information management unit 40 can check the real-time friction plate data of each wheel, and the vehicle can prompt when being electrified on a gear each time: please replace the friction plate.
In some embodiments, the controller 20 is further configured to obtain a historical reference voltage of a previous friction plate after a new friction plate is replaced, and generate a brake disc replacement reminding message when a difference between the historical reference voltage and the reference voltage of the new friction plate is greater than a set reference threshold.
Specifically, the floating caliper disc brake 200 is self-adjusting in clearance, the detection device 10 measures the length of the brake caliper relative to the caliper bracket, and converts the initial relative length information when the friction plates are not worn into a voltage signal through the controller 20, and the voltage value at this time is the reference voltage.
Specifically, in practical application, after a new friction plate is replaced, when the wear monitoring system controller 20 records that the braking frequency is more than or equal to 50 times and the vehicle speed is more than or equal to 5km/h, the historical reference voltage recorded by the controller 20 is compared with the reference voltage of the replaced friction plate, so that the wear loss L1 and L2 of one side of the brake disc can be calculated, when the L1+ L2 are more than or equal to the brake disc wear threshold value (preferably 8mm), the controller 20 sends a brake disc alarm signal to an instrument through the gateway 30, and the instrument displays the alarm signal: please replace the brake disc.
In some embodiments, when the remaining wear amount of one of the two coaxially disposed floating caliper disc brakes 200 is less than or equal to the alarm threshold, the controller 20 obtains the smallest remaining wear amount of the two floating caliper disc brakes 200 on the other shaft adjacent thereto, and calculates the difference between the remaining wear amounts of the two floating caliper disc brakes 200. And the controller 20 is further configured to generate replacement information of the inner and outer friction plates in all the floating caliper disc brakes 200 on the adjacent two shafts when the difference value is smaller than the shaft end difference threshold value. Therefore, the driving safety can be improved.
In some embodiments, the controller 20 is further configured to obtain the vehicle mileage information and calculate an average value of the wear amounts of the friction plates of the whole vehicle, which obtains a certain threshold mileage value, and obtain the remaining distance that can be traveled according to the average value of the remaining wear amount and the wear amount of the friction plates of the whole vehicle.
Specifically, in actual application, the controller 20 obtains the vehicle driving mileage information through the CAN network, calculates the average value of the wear loss of the whole vehicle friction plate with a certain threshold mileage value, converts the residual wear loss into the residual runnable mileage through the average value of the wear loss of the whole vehicle friction plate, and sends the residual runnable mileage to the information management unit 40 through the gateway 30, so that the driver CAN conveniently check the residual runnable mileage of the friction plate.
In some embodiments, the controller 20 is further configured to control the detecting device 10 to start after the number of braking times reaches a set threshold value after the vehicle is started, and the vehicle speed is greater than the threshold vehicle speed and runs for a preset time. Thus, the fluctuation of the wear loss data acquisition caused by environmental conditions and vibration can be avoided, and the detection accuracy of the detection device 10 is improved.
As the same concept of the present application, there is also provided a method of monitoring wear of a friction plate of a floating caliper disc brake 200, including:
step S400, monitoring the total wear rate of the inner friction plate and the outer friction plate and the wear rate of the inner friction plate on any one floating caliper disc brake 200 in the vehicle.
In the embodiment of the present application, the detecting device 10 coupled to the floating caliper disc brake 200 is used to monitor the total wear amount of the inner and outer friction plates and the wear amount of the inner friction plate on any one floating caliper disc brake 200 in the vehicle. The detecting device 10 includes a main sensor for monitoring the total wear amount of the inner and outer friction plates and an auxiliary sensor for monitoring the wear amount of the inner friction plate.
And step S500, acquiring a difference value of the abrasion loss of the inner friction plate and the abrasion loss of the outer friction plate according to the total abrasion loss of the inner friction plate and the outer friction plate and comparing the difference value of the abrasion loss with a preset abrasion threshold value to determine the fault type of the friction plate.
Specifically, in the embodiment of the present application, the controller 20 is in communication connection with the detecting device 10, and is configured to obtain a difference between wear amounts of the inner and outer friction plates according to the total wear amount and the wear amount of the inner friction plate, and determine a fault type of the friction plate according to a comparison between the difference between the wear amount and a preset wear threshold.
In some embodiments, the preset wear threshold includes a first failure threshold and a second failure threshold. The method comprises the following steps of obtaining the difference value of the abrasion loss of the inner friction plate and the outer friction plate according to the total abrasion loss of the inner friction plate and the outer friction plate and the abrasion loss of the inner friction plate, and determining the fault type of the friction plate according to the comparison of the difference value of the abrasion loss and a preset abrasion threshold value:
step S510, when the abrasion loss difference value is larger than or equal to the first fault threshold value and smaller than the second fault threshold value, determining that the fault type of the friction plate is eccentric wear of the friction plate.
Specifically, in the embodiment of the present application, if the controller 20 receives the calculated wear amounts x of the inner and outer friction plates of a certain wheel1、x2When the first fault threshold is ≦ x1-x2The second failure threshold value is less than or equal to | the data result obtained by the calculation is received by the controller 20 and circularly judged for 50 times, the controller 20 sends an eccentric wear signal and friction plate data to the instrument and information management unit 40 through the gateway 30, and the information management unit 40 displays: the friction plate of the braking system is eccentric.
In step S530, when the wear loss difference is greater than or equal to the second failure threshold, the failure type of the friction plate is that the friction plate is broken.
Specifically, in the embodiment of the application, if the control receives the calculated abrasion loss x of the inner friction plate and the outer friction plate of a certain wheel1、x2，|x1-x2If greater than the second failure threshold, the controller 20 receives the calculated data result and circularly judges the data result for 50 times, the controller 20 sends the block falling signal and the friction plate data to the instrument and information management unit 40 through the gateway 30, and the instrument displays: the friction plate of the braking system falls off.
In some embodiments, the friction plate wear monitoring method further comprises:
and step S550, acquiring the residual abrasion loss of the inner friction plate and the outer friction plate according to the difference value between the initial thickness and the total abrasion loss of the friction plates, and determining the fault type of the friction plates as friction plate abrasion according to the comparison between the residual abrasion loss and a preset abrasion threshold value.
Specifically, the preset wear threshold further includes a third failure threshold, and the third failure threshold includes an early warning threshold and an alarm threshold. Step S550 includes step S551 and step S553.
And S551, generating friction plate abrasion reminding information when the residual abrasion loss is greater than the alarm threshold and less than or equal to the early warning threshold.
Specifically, a difference x (remaining wear amount) between the friction plate data and the theoretical thickness of the vehicle friction plate at this time is calculated, and if x is found to be greater than a friction plate early warning threshold (preferably, 16.67% of the total friction plate thickness), the friction plate data is sent to the information management unit 40 only through the gateway 30. If the friction plate alarm threshold (preferably 10% of the total friction plate thickness) < x is less than or equal to the early warning threshold, the controller 20 receives the calculated data result, circularly judges the number of times of braking greater than a certain threshold (preferably 50 times), and then sends the early warning signal and the friction plate data to the instrument and information management unit 40 through the gateway 30, the instrument displays the corresponding early warning signal to remind a driver of paying attention to check the state of the friction plate, and the information management unit 40 can check the real-time friction plate data of each wheel.
And step S553, when the residual abrasion loss difference value is less than or equal to the alarm threshold value, generating a friction plate replacement reminding message.
Specifically, if the data difference x is larger than the alarm threshold, entering the last judgment procedure; if the data difference x is not greater than the alarm threshold value, the controller 20 receives the calculated data result and circularly judges the data result for 50 times, the controller 20 sends an alarm signal and friction plate data to the instrument and information management unit 40 through the gateway 30, the instrument displays a corresponding alarm signal to remind a driver of replacing the friction plate in time, the information management unit 40 can check the real-time friction plate data of each wheel, and the vehicle can prompt when being electrified on a gear each time: please replace the friction plate.
In some embodiments, the friction plate wear monitoring method further comprises:
step S600, after a new friction plate is replaced, the historical reference voltage of the previous friction plate is obtained, and when the difference value between the historical reference voltage and the reference voltage of the new friction plate is larger than a set reference threshold value, brake disc replacement reminding information is generated.
Specifically, after a new friction plate is replaced, when the wear monitoring system controller 20 records that the braking frequency is more than or equal to 50 times and the vehicle speed is more than or equal to 5km/h, the historical reference voltage recorded by the controller 20 is compared with the reference voltage of the replaced friction plate, so that the wear loss L1 and L2 of one side of the brake disc can be calculated, when L1+ L2 is more than or equal to the brake disc wear threshold (preferably 8mm), the controller 20 sends a brake disc alarm signal to an instrument through the gateway 30, and the instrument displays the alarm signal: please replace the brake disc.
In some embodiments, the friction plate wear monitoring method further comprises:
step S550, when the residual abrasion loss of one of the two coaxially arranged floating caliper disc brakes 200 is smaller than or equal to the alarm threshold value, obtaining the minimum residual abrasion loss of the two floating caliper disc brakes 200 on the other shaft adjacent to the same, and calculating to obtain the difference value of the residual abrasion losses of the two floating caliper disc brakes 200;
and when the difference value is smaller than the shaft end difference threshold value, the replacement information of the inner friction plate and the outer friction plate in all the floating caliper disc brakes 200 on the adjacent two shafts is generated.
In some embodiments, the friction plate wear monitoring method further comprises:
and step S700, acquiring vehicle driving mileage information, calculating an average value of the wear loss of the whole vehicle friction plate with a certain threshold mileage value, and obtaining the residual distance according to the average value of the residual wear loss and the wear loss of the whole vehicle friction plate.
Specifically, in the implementation of the application, the controller 20 obtains the vehicle driving mileage information through the CAN network, calculates the average value of the wear loss of the whole vehicle friction plate with a certain threshold mileage value, converts the residual wear loss into the residual runnable mileage through the average value of the wear loss of the whole vehicle friction plate, and sends the residual runnable mileage to the information management unit 40 through the gateway 30, so that the driver CAN conveniently check the residual runnable mileage of the friction plate.
In some embodiments, the step of monitoring the total wear amount of the inner friction plate and the outer friction plate and the wear amount of the inner friction plate on any one of the floating caliper disc brakes 200 in the vehicle further comprises the following steps:
step S300, after the vehicle is started, the braking frequency reaches a set threshold value, the vehicle speed is greater than the threshold value vehicle speed, and the vehicle runs for a preset time, so that the abrasion loss data collection fluctuation caused by environmental conditions and vibration is avoided, and the detection accuracy of the detection device 10 is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (16)
1. A friction plate wear monitoring system of a floating caliper disc brake comprises caliper body brackets and a brake caliper body, wherein each brake caliper body is provided with an inner friction plate and an outer friction plate, and the brake caliper body can make telescopic motion relative to the caliper body brackets and drive the inner friction plate and the outer friction plate to clamp a brake disc; it is characterized by comprising:
the detection device is connected to the floating caliper disc brake in a matched mode and used for monitoring the total wear rate of inner and outer friction plates and the wear rate of the inner friction plate on any one floating caliper disc brake in a vehicle; and
and the controller is in communication connection with the detection device and is used for acquiring a difference value of the wear amounts of the inner and outer friction plates according to the total wear amount and the wear amount of the inner friction plate and determining the fault type of the friction plate according to the comparison between the difference value of the wear amounts and a preset wear threshold value.
2. A friction plate wear monitoring system of a floating caliper disc brake according to claim 1, wherein the preset wear threshold includes a first failure threshold and a second failure threshold;
when the wear capacity difference value is greater than or equal to the first fault threshold value and less than or equal to the second fault threshold value, the controller determines that the fault type of the friction plate is eccentric wear of the friction plate;
and when the wear loss difference is larger than the second fault threshold value, the controller determines that the fault type of the friction plate is that the friction plate is broken.
3. A friction plate wear monitoring system of a floating caliper disc brake according to claim 2, wherein the controller is further configured to obtain a remaining wear amount of the inner and outer friction plates according to a difference between an initial thickness of the friction plate and the total wear amount of the inner and outer friction plates, and further determine the type of failure of the friction plate as friction plate wear according to a comparison of the remaining wear amount with a preset wear threshold.
4. A friction plate wear monitoring system of a floating caliper disc brake according to claim 3, wherein the preset wear threshold further comprises a third failure threshold comprising an early warning threshold and an alarm threshold;
when the residual abrasion loss is larger than the alarm threshold value and smaller than or equal to the early warning threshold value, the controller generates friction plate abrasion reminding information;
and when the residual abrasion loss difference value is less than or equal to the alarm threshold value, the controller generates friction plate replacement reminding information.
5. The system for monitoring wear of a friction plate of a floating caliper disc brake according to claim 4, wherein the controller is further configured to obtain a historical reference voltage of a previous friction plate after a new friction plate is replaced, and generate a brake disc replacement reminding message when a difference between the historical reference voltage and the reference voltage of the new friction plate is greater than or equal to a set reference threshold.
6. The system for monitoring wear of a friction plate of a floating caliper disc brake as claimed in claim 4, wherein when the remaining wear amount of one of two coaxially disposed floating caliper disc brakes is less than or equal to the alarm threshold, the controller obtains the smallest remaining wear amount of the two floating caliper disc brakes on the other shaft adjacent to the controller, and calculates a difference between the remaining wear amounts of the two floating caliper disc brakes;
and the controller is also used for generating replacement reminding information of inner and outer friction plates in all the floating caliper disc brakes on the adjacent two shafts when the difference value is smaller than the shaft end difference threshold value.
7. The system of claim 3, wherein the controller is further configured to obtain vehicle mileage information and calculate an average of the total wear amounts of the friction plates for obtaining a threshold mileage value, and obtain the remaining distance to be traveled according to the average of the remaining wear amounts and the total wear amounts.
8. A friction plate wear monitoring system of a floating caliper disc brake as claimed in claim 1, wherein the controller is further configured to control the detecting device to start after the number of braking times reaches a set threshold value after the vehicle is started, the vehicle speed is greater than the threshold vehicle speed, and the vehicle is driven for a preset time.
9. A method for monitoring the wear of a friction plate of a floating caliper disc brake is characterized by comprising the following steps:
monitoring the total wear rate of an inner friction plate and an outer friction plate on any floating caliper disc brake in a vehicle and the wear rate of the inner friction plate;
and acquiring a difference value of the wear amounts of the inner friction plate and the outer friction plate according to the total wear amounts of the inner friction plate and the outer friction plate and the wear amount of the inner friction plate, and determining the fault type of the friction plate according to the comparison of the difference value of the wear amounts and a preset wear threshold value.
10. A friction plate wear monitoring method of a floating caliper disc brake according to claim 9, wherein the preset wear threshold includes a first failure threshold and a second failure threshold; the method comprises the following steps of obtaining the difference value of the abrasion loss of the inner friction plate and the outer friction plate according to the total abrasion loss of the inner friction plate and the outer friction plate and the abrasion loss of the inner friction plate, and determining the fault type of the friction plate according to the comparison of the difference value of the abrasion loss and a preset abrasion threshold value:
when the abrasion loss difference value is greater than or equal to the first fault threshold value and less than or equal to the second fault threshold value, determining that the fault type of the friction plate is eccentric wear of the friction plate;
and when the wear loss difference is larger than the second fault threshold value, the fault type of the friction plate is that the friction plate is broken.
11. The friction plate wear monitoring method of a floating caliper disc brake according to claim 10, further comprising:
and obtaining the residual abrasion loss of the inner friction plate and the outer friction plate according to the difference between the initial thickness of the friction plate and the total abrasion loss, and determining the fault type of the friction plate as friction plate abrasion according to the comparison between the residual abrasion loss and a preset abrasion threshold value.
12. A friction plate wear monitoring method of a floating caliper disc brake according to claim 11, wherein the preset wear threshold further includes a third failure threshold, the third failure threshold includes an early warning threshold and an alarm threshold;
when the residual abrasion loss is larger than the alarm threshold value and smaller than or equal to the early warning threshold value, friction plate abrasion reminding information is generated;
and when the residual abrasion loss difference value is less than or equal to the alarm threshold value, generating friction plate replacement reminding information.
13. A friction plate wear monitoring method of a floating caliper disc brake according to claim 12, further comprising:
and after a new friction plate is replaced, acquiring the historical reference voltage of the previous friction plate, and generating brake disc replacement reminding information when the difference value between the historical reference voltage and the reference voltage of the new friction plate is greater than or equal to a set reference threshold value.
14. A friction plate wear monitoring method of a floating caliper disc brake according to claim 12, further comprising:
when the residual abrasion loss of one of the two coaxially arranged floating caliper disc brakes is smaller than or equal to the alarm threshold value, acquiring the minimum residual abrasion loss of the two floating caliper disc brakes on the other shaft adjacent to the same, and calculating to obtain the difference value of the residual abrasion losses of the two floating caliper disc brakes;
and when the difference value is smaller than the shaft end difference threshold value, the replacement information of the inner friction plate and the outer friction plate in all the floating caliper disc brakes on the adjacent two shafts is generated.
15. The friction plate wear monitoring method of a floating caliper disc brake according to claim 11, further comprising:
the method comprises the steps of obtaining vehicle driving mileage information, calculating an average value of the wear loss of a whole vehicle friction plate with a certain threshold mileage value, and obtaining the residual distance according to the residual wear loss and the average value of the wear loss of the whole vehicle friction plate.
16. The method for monitoring the wear of the friction plates of the floating caliper disc brake according to claim 9, wherein the step of monitoring the total wear amount of the inner friction plates and the outer friction plates and the wear amount of the inner friction plates on any one floating caliper disc brake in the vehicle further comprises the following steps:
after the vehicle is started, the braking frequency reaches a set threshold value, the vehicle speed is greater than the threshold value, and the vehicle runs for a preset time.
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| CN202111343243.1A CN113983093B (en) | 2021-11-13 | 2021-11-13 | Friction plate abrasion monitoring system and method for floating caliper disc brake |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114572179A (en) * | 2022-02-14 | 2022-06-03 | 岚图汽车科技有限公司 | Method, device and equipment for detecting abrasion of automatic friction plate of vehicle and storage medium |
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| EP0567155A1 (en) * | 1992-04-24 | 1993-10-27 | DEUTSCHE PERROT-BREMSE GmbH | Wear surveillance device for a sliding caliper disc brake |
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| DE10132968A1 (en) * | 2001-07-06 | 2003-01-23 | Wabco Gmbh & Co Ohg | Wear monitoring arrangement for sliding caliper disk brake has two displacement sensors in form of common displacement sensor |
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