CN113983093B - Friction plate abrasion monitoring system and method for floating caliper disc brake - Google Patents
Friction plate abrasion monitoring system and method for floating caliper disc brake Download PDFInfo
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- CN113983093B CN113983093B CN202111343243.1A CN202111343243A CN113983093B CN 113983093 B CN113983093 B CN 113983093B CN 202111343243 A CN202111343243 A CN 202111343243A CN 113983093 B CN113983093 B CN 113983093B
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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 friction plate wear monitoring system and a friction plate wear monitoring method for 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 move in a telescopic manner relative to the caliper body bracket and drive the inner friction plate and the outer friction plate to clamp a brake disc. The friction plate wear monitoring system includes: the detection device is matched and connected to the floating caliper disc brake and is used for monitoring the total abrasion loss of the inner friction plate and the outer friction plate and the abrasion loss of the inner friction plate on any floating caliper disc brake in the vehicle; and the controller is in communication connection with the detection device and is used for acquiring the abrasion loss difference value of the inner friction plate and the outer friction plate according to the total abrasion loss and the abrasion loss of the inner friction plate and determining the fault type of the friction plate according to the comparison of the abrasion loss difference value and a preset abrasion threshold value. The friction plate abrasion monitoring system can determine various fault types of the friction plate according to comparison of the abrasion loss difference value and a preset abrasion threshold value, so that the hidden danger of driving is reduced.
Description
Technical Field
The application relates to the technical field of automobile braking, in particular to a friction plate abrasion monitoring system and method of a floating caliper disc brake.
Background
Brakes are components for generating forces that counteract the movement or movement tendency of a vehicle, which is generated with the vehicle and which, as the automotive industry evolves, are developed from the most primitive shoe to drum, now to disc brakes.
Disc brakes can be divided into fixed caliper disc type and floating caliper disc type. Wherein, the brake caliper of the floating caliper disc brake can axially slide relative to the brake disc. The floating caliper disc brake has a piston on only one side, and when the brake is pressed down, 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, so that the friction plate on the other side is also pressed to the brake disc, and braking is generated.
The friction plate is a consumable part, and the friction plate needs to be replaced after being worn to a certain extent to ensure driving safety, but the too early replacement can cause low utilization degree of the friction plate, waste of resources and increase the cost of the user for driving. However, current friction plate wear monitoring systems have limited fault type detection and severely affect driving safety.
Disclosure of Invention
Based on the above, it is necessary to provide a friction plate wear monitoring system and method for a floating caliper disc brake capable of prompting various faults of a vehicle to ensure driving safety aiming at the problems that the existing friction plate wear monitoring system has limited fault type detection and seriously affects driving safety.
According to one aspect of the application, a friction plate abrasion monitoring system of a floating caliper disc brake is provided, each floating caliper disc brake comprises a caliper body 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 in a telescopic mode relative to the caliper body bracket and drive the inner friction plate and the outer friction plate to clamp a brake disc; comprising the following steps:
the detection device is matched and connected to the floating caliper disc brake and is used for monitoring the total abrasion loss of the inner friction plate and the outer friction plate and the abrasion loss of the inner friction plate on any floating caliper disc brake in a vehicle; a kind of electronic device with high-pressure air-conditioning system
And the controller is in communication connection with the detection device and is used for acquiring the abrasion loss difference value of the inner friction plate and the outer friction plate according to the total abrasion loss and the abrasion loss of the inner friction plate and determining the fault type of the friction plate according to the comparison of the abrasion loss difference value and a preset abrasion threshold value.
In one embodiment, the preset wear threshold includes a first failure threshold and a second failure threshold;
when the wear amount difference is greater than or equal to the first failure threshold and less than or equal to the second failure threshold, the controller determines that the failure type of the friction plate is friction plate eccentric wear;
and when the abrasion loss difference value is larger than the second fault threshold value, the controller determines that the fault type of the friction plate is friction plate falling.
In one embodiment, the controller is further configured to obtain a residual wear amount of the inner and outer friction plates according to a difference between an initial thickness of the friction plates and the total wear amount, and determine that the failure type of the friction plates is friction plate wear according to a comparison between the residual wear amount and a preset wear threshold.
In one embodiment, the preset wear threshold further includes a third fault threshold, where the third fault threshold includes an early warning threshold and an alarm threshold;
when the residual abrasion loss is larger than the alarm threshold and smaller than or equal to the early warning threshold, the controller generates friction plate abrasion reminding information;
and when the residual abrasion loss difference value is smaller than or equal to the alarm threshold value, the controller generates a friction plate replacement reminding message.
In one embodiment, the controller is further configured to obtain a historical reference voltage of a previous friction plate after the new friction plate is replaced, and generate a brake disc replacement reminding message when a 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, when the residual abrasion loss of one of the two floating caliper disc brakes arranged coaxially is smaller than or equal to the alarm threshold value, the controller acquires the smallest residual abrasion loss of the two floating caliper disc brakes on the other shaft adjacent to the first floating caliper disc brake, and calculates the difference value of the residual abrasion loss of the two floating caliper disc brakes;
and the controller is also used for generating the replacement reminding information of the inner friction plate and the outer friction plate in the floating caliper disc brake on all the adjacent 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 driving mileage information, calculate an average value of a total vehicle friction plate wear amount of a certain threshold mileage value, and obtain a remaining running mileage according to the remaining wear amount and the average value of the total vehicle friction plate wear amount.
In one embodiment, the controller is further configured to control the detection device 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 a threshold vehicle speed and 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 total abrasion loss of an inner friction plate and an outer friction plate of any floating caliper disc brake in a vehicle and abrasion loss of the inner friction plate;
and acquiring 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.
In one embodiment, the preset wear threshold includes a first failure threshold and a second failure threshold; the method for determining the fault type of the friction plate comprises the following steps of:
when the wear amount 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 friction plate eccentric wear;
and when the abrasion loss difference value is larger than the second fault threshold value, the fault type of the friction plate is friction plate falling.
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 value 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 of the residual abrasion loss and a preset abrasion threshold value.
In one embodiment, the preset wear threshold further includes a third fault threshold, where the third fault threshold includes an early warning threshold and an alarm threshold;
when the residual abrasion loss is larger than the alarm threshold and smaller than or equal to the early warning threshold, friction plate abrasion reminding information is generated;
and when the residual abrasion loss difference value is smaller 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 acquiring the historical reference voltage of the last friction plate after replacing the new 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 smallest residual abrasion loss of the two floating caliper disc brakes on the other shaft adjacent to the one floating caliper disc brake, and calculating to obtain the difference value of the residual abrasion loss of the two floating caliper disc brakes;
and when the difference value is smaller than the shaft end difference threshold value, generating the replacement information of the inner friction plate and the outer friction plate in all the floating caliper disc brakes on the two adjacent shafts.
In one embodiment, the friction plate wear monitoring method further comprises:
and acquiring vehicle driving mileage information, calculating an average value of the abrasion loss of the friction plate of the whole vehicle, which is used for acquiring a certain threshold mileage value, and acquiring the residual running mileage according to the residual abrasion loss and the average value of the abrasion loss of the friction plate of the whole vehicle.
In one embodiment, before the monitoring of the total wear of the inner friction plate and the outer friction plate and the wear of the inner friction plate of any one floating caliper disc brake in the vehicle, the method further comprises the steps of:
the number of times of braking of the vehicle after starting reaches a set threshold value, and the vehicle speed is greater than the threshold vehicle speed and runs for a preset time.
According to the friction plate abrasion monitoring system of the floating caliper disc brake, the total abrasion loss of the inner friction plate and the outer friction plate and the abrasion loss of the inner friction plate are detected, so that the abrasion loss of the outer friction plate is obtained. And then, the difference between the abrasion loss of the inner friction plate and the abrasion loss of the outer friction plate is carried out to obtain the abrasion loss difference of the inner film friction plate. And then, according to the comparison of the abrasion loss difference value and a preset abrasion threshold value, a plurality of fault types of the friction plate can be determined, so that the running safety is ensured.
Drawings
FIG. 1 is a schematic diagram of a friction plate wear monitoring system for a floating caliper disc brake in accordance with one embodiment of the present application;
FIG. 2 is a schematic flow chart of a method for detecting wear of a friction plate according to an embodiment of the present disclosure;
FIG. 3 is a schematic illustration of a friction plate bias wear fault determination process in an embodiment of the present application;
FIG. 4 is a schematic diagram of a friction plate block failure determination process according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a friction plate wear failure warning process according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a friction plate wear failure warning process in an embodiment of the present application;
fig. 7 is a schematic diagram of a remaining running mileage calculation process of a vehicle according to an embodiment of the present application.
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. a floating caliper disc brake.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" 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 are used herein for illustrative purposes only and are not meant to be the only embodiment.
The friction plate wear monitoring system and method of the floating caliper disc brake of the present application will be described with reference to the accompanying drawings. For convenience of description, only the structures related to the present application are shown in the drawings.
Each floating caliper disc brake 200 on the vehicle 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 movement relative to the caliper body 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 body bracket fixedly connected to the axle housing, and a brake caliper body positioned and connected to the caliper body bracket through a main sliding pin and an auxiliary sliding pin, wherein an inner friction plate and an outer friction plate are arranged between the brake caliper body and the brake disc.
The friction plate wear monitoring system 100 of the floating caliper disc brake 200 according to at least one embodiment of the present application includes a detection device 10 and a controller 20.
The detection device 10 is coupled to the floating caliper disc brake 200, and is used for monitoring total wear of inner and outer friction plates and wear of the inner friction plates on any floating caliper disc brake 200 in a vehicle.
In particular to some embodiments, the detection device 10 includes a primary sensor and a secondary sensor fixedly attached to the primary and secondary slide pins of the brake caliper for monitoring the length of movement of the brake caliper relative to the caliper body bracket. 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 detecting device 10, and is configured to obtain a difference between 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 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 primary sensor and the secondary sensor through a wire harness, and is configured to analyze the telescopic dimensions of the brake caliper relative to the caliper body bracket, calculate thickness data of the inner and outer friction plates, determine the states (including fault information) of the inner and outer friction plates, and send the friction plate data and the states to the information management unit 40 and the in-vehicle meter through the gateway 30. Through the comparison of the abrasion loss difference value and a preset abrasion threshold value, various fault types of the friction plate can be determined, and the hidden danger of driving is reduced, so that the driving safety is ensured.
The gateway 30 is connected with the controller 20 through a wire harness, so as to forward the data of the inner friction plate and the outer friction plate and the states of the inner friction plate and the outer friction plate calculated by the controller 20 to the information management unit 40 and the instrument, remind the driver of replacement and facilitate the driver to check related faults.
The information management unit 40 is connected with the gateway 30 through the 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 residual running mileage, the eccentric wear block and other faults.
The combination meter 50 is connected with the gateway 30 through the CAN bus, and the combination meter 50 receives data sent by the gateway 30, so that a driver is reminded of replacing friction plates, and meanwhile, when the phenomenon that the driving safety is influenced by the block falling fault occurs, the phenomenon is displayed on the meter: brake system friction plate failure.
The controller 20 has a filtering function. The controller 20 has a filtering function for the signals collected by the detection device 10, and mainly filters out the signals which are collected by the sensor and exceed the conventional signal values, and does not perform calculation.
The controller 20 has a delay function. Because of the resistance sensor characteristic, the sensor characteristic is nonlinear in a low temperature state, in order to ensure the accuracy of data and avoid large data jump fluctuation, a time threshold is required to be set for transmitting processed sensor data to the gateway 30.
The controller 20 has a memory function. Each time the vehicle is switched from off to on, the controller 20 is in an active state, and the controller 20 transmits friction plate data (history) before the last stop and stall state to the gateway 30 and forwards the friction plate 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 friction plate bias wear. When the wear amount difference is greater than the second failure threshold, the controller 20 determines that the failure type of the friction plate is a friction plate chunking.
In particular, in some embodiments, if the controller 20 receives the calculated amount x of wear of the inner and outer friction plates of a wheel 1 、x 2 When the first fault threshold value is less than or equal to |x 1 -x 2 And the second fault threshold is not more than the first fault threshold, the controller 20 receives the calculated data result and circularly judges 50 times, the controller 20 sends the eccentric wear signal and the 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 biased.
If the wear x of the inner friction plate and the outer friction plate of a certain wheel is calculated by control and reception 1 、x 2 ，|x 1 -x 2 The controller 20 receives the calculated value of I > second failure thresholdThe controller 20 sends the block-falling signal and the friction plate data to the meter and information management unit 40 through the gateway 30, and the meter displays: the friction plate of the braking system is broken.
Further, the controller 20 is further configured to obtain a residual wear amount of the inner and outer friction plates according to a difference between an initial thickness of the friction plates and a total wear amount of the inner and outer friction plates, and determine that the failure type of the friction plates is friction plate wear according to a comparison between the residual wear amount and a preset wear threshold. When the friction plate fails due to wear, it means that 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 and less than or equal to the early warning threshold, the controller 20 generates friction plate wear warning information. When the remaining wear amount difference is equal to or less than the alarm threshold, the controller 20 generates a friction plate replacement reminding message.
Specifically, in actual practice, the difference x (residual wear amount) between the friction plate data and the theoretical thickness of the friction plate of the vehicle at this time is calculated, and if x > the friction plate early warning threshold (preferably 16.67% of the total friction plate thickness) is found, the friction plate data is sent to the information management unit 40 only through the gateway 30. If the friction plate alarm threshold value (preferably 10% of the total friction plate thickness) < x is less than or equal to the early warning threshold value, after the controller 20 receives the calculated data result, circularly judges that the calculated data result is greater than a certain threshold braking time (preferably 50 times), the early warning signal and the friction plate data are sent to the instrument and the information management unit 40 through the gateway 30, the instrument displays the corresponding early warning signal, the driver is reminded to pay attention to check the friction plate state, and the information management unit 40 can check the friction plate data of each wheel in real time.
Further, if the data difference x is larger than the alarm threshold, entering a last judging program; if the data difference x is less than or equal to the alarm threshold value, the controller 20 receives the calculated data result and circularly judges 50 times, the controller 20 sends alarm signals and friction plate data to the instrument and information management unit 40 through the gateway 30, the instrument displays corresponding alarm signals to remind a driver to replace the friction plate in time, the information management unit 40 can check the friction plate data of each wheel in real time, and each time the vehicle is powered on, the information management unit 40 prompts that: 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 replacing a new friction plate, and generate a brake disc replacement alert 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 terms of clearance, the detection device 10 measures the length of the brake caliper relative to the caliper body bracket, and converts initial relative length information of the friction plate when the friction plate is not worn into a voltage signal by the controller 20, and the voltage value at this time is a reference voltage.
Specifically, in actual application, after a new friction plate is replaced, when the number of times of braking recorded by the controller 20 of the wear monitoring system is more than or equal to 50, and the vehicle speed is more than or equal to 5km/h, the wear amounts L1 and L2 of one side of the brake disc can be calculated by comparing the historical reference voltage recorded by the controller 20 with the reference voltage of the replaced friction plate, and when the L1+ L2 is more than or equal to the wear threshold value (preferably 8 mm) of the brake disc, 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 residual wear amount of one of the two floating caliper disc brakes 200 coaxially disposed is equal to or less than the alarm threshold, the controller 20 obtains the smallest one of the residual wear amounts of the two floating caliper disc brakes 200 on the other shaft adjacent thereto, and calculates the difference of the residual wear amounts of the two. And the controller 20 is further configured to generate the replacement information of the inner and outer friction plates in all of the floating caliper disc brakes 200 on the adjacent two shafts when the difference is less than the shaft end difference threshold. Thus, the driving safety can be improved.
In some embodiments, the controller 20 is further configured to obtain vehicle mileage information and calculate an average value of the total vehicle friction plate wear amount for obtaining a certain threshold mileage value, and obtain the remaining running mileage according to the average value of the remaining wear amount and the total vehicle friction plate wear amount.
Specifically, in actual application, the controller 20 obtains vehicle driving mileage information through the CAN network, calculates and obtains an average value of the abrasion loss of the friction plate of the whole vehicle with a certain threshold mileage value, converts the residual abrasion loss into residual running mileage through the average value of the abrasion loss of the friction plate of the whole vehicle, and sends the residual running mileage to the information management unit 40 through the gateway 30, so that a driver CAN check the residual running mileage of the friction plate conveniently.
In some embodiments, the controller 20 is further configured to control the detection device 10 to activate after the number of braking operations reaches a set threshold value after the vehicle is activated and the vehicle speed is greater than the threshold vehicle speed and travels for a preset time. In this way, fluctuation in the data acquisition of the amount of wear due to environmental conditions and vibration can be avoided, thereby improving the detection accuracy of the detection device 10.
As the same concept of the present application, there is also provided a friction plate wear monitoring method of a floating caliper disc brake 200, including:
step S400, monitoring the total wear and tear of the inner friction plate and the outer friction plate and the wear and tear of the inner friction plate on any one of the floating caliper disc brakes 200 in the vehicle.
Specifically, in this embodiment, the detection device 10 coupled to the floating caliper disc brake 200 is configured to monitor the total wear and tear of the inner and outer friction plates and the wear and tear of the inner friction plates on any one of the floating caliper disc brake 200 in the vehicle. The detection device 10 includes a primary sensor that monitors the total wear of the inner and outer friction plates, and a secondary sensor that monitors the wear of the inner friction plates.
And S500, acquiring 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.
Specifically, in this embodiment, the controller 20 is communicatively connected to the detecting device 10, and is configured to obtain a difference between 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 determine a fault type of the friction plate according to a comparison between the difference between the wear amounts and a preset wear threshold.
In some embodiments, the preset wear threshold includes a first failure threshold and a second failure threshold. The method for determining the fault type of the friction plate comprises the following steps of:
in step S510, when the wear amount difference is greater than or equal to the first failure threshold and less than the second failure threshold, it is determined that the failure type of the friction plate is friction plate bias wear.
Specifically, in the embodiment of the present application, if the controller 20 receives the calculated wear x of the inner and outer friction plates of a certain wheel 1 、x 2 When the first fault threshold value is less than or equal to |x 1 -x 2 And the second fault threshold is not more than the first fault threshold, the controller 20 receives the calculated data result and circularly judges 50 times, the controller 20 sends the eccentric wear signal and the 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 biased.
In step S530, when the difference in the wear amounts is greater than or equal to the second failure threshold, the failure type of the friction plate is a friction plate falling block.
In the embodiment of the application, if the calculated wear x of the inner and outer friction plates of a certain wheel is controlled 1 、x 2 ，|x 1 -x 2 The controller 20 receives the calculated data result and circularly judges 50 times, the controller 20 sends the block dropping 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 is broken.
In some embodiments, the friction plate wear monitoring method further comprises:
and step S550, 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 failure type of the friction plate as friction plate abrasion according to the comparison of the residual abrasion loss and a preset abrasion threshold value.
Specifically, the preset wear threshold further comprises a third fault threshold, and the third fault threshold comprises an early warning threshold and an alarm threshold. Step S550 includes step S551 and step S553.
And S551, when the residual abrasion loss is larger than the alarm threshold and smaller than or equal to the early warning threshold, generating abrasion reminding information of the friction plate.
Specifically, the 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 > the friction plate warning threshold value (preferably 16.67% of the total friction plate thickness) is found, the friction plate data is sent only to the information management unit 40 through the gateway 30. If the friction plate alarm threshold value (preferably 10% of the total friction plate thickness) < x is less than or equal to the early warning threshold value, after the controller 20 receives the calculated data result, circularly judges that the calculated data result is greater than a certain threshold braking time (preferably 50 times), the early warning signal and the friction plate data are sent to the instrument and the information management unit 40 through the gateway 30, the instrument displays the corresponding early warning signal, the driver is reminded to pay attention to check the friction plate state, and the information management unit 40 can check the friction plate data of each wheel in real time.
And S553, when the residual abrasion loss difference value is smaller 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 value, entering a last judging program; if the data difference x is less than or equal to the alarm threshold value, the controller 20 receives the calculated data result and circularly judges 50 times, the controller 20 sends alarm signals and friction plate data to the instrument and information management unit 40 through the gateway 30, the instrument displays corresponding alarm signals to remind a driver to replace the friction plate in time, the information management unit 40 can check the friction plate data of each wheel in real time, and each time the vehicle is powered on, the information management unit 40 prompts that: please replace the friction plate.
In some embodiments, the friction plate wear monitoring method further comprises:
step S600, acquiring the historical reference voltage of the last friction plate after replacing the new 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 larger than a set reference threshold value.
Specifically, after a new friction plate is replaced, when the number of times of braking is recorded by the wear monitoring system controller 20 and is greater than or equal to 50 times, and the vehicle speed is greater than or equal to 5km/h, the wear amounts L1 and L2 of one side of the brake disc can be calculated by comparing the historical reference voltage recorded by the controller 20 with the reference voltage of the replaced friction plate, and when the L1+ L2 is greater than or equal to the brake disc wear threshold value (preferably 8 mm), 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 floating caliper disc brakes 200 coaxially arranged is smaller than or equal to an alarm threshold value, acquiring the smallest residual abrasion loss of the two floating caliper disc brakes 200 on the other shaft adjacent to the alarm threshold value, and calculating to obtain the difference value of the residual abrasion loss of the two floating caliper disc brakes;
and when the difference value is smaller than the shaft end difference threshold value, the inner and outer friction plate replacement information 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 S700, acquiring vehicle driving mileage information, calculating an average value of the abrasion loss of the friction plate of the whole vehicle, which is used for acquiring a certain threshold mileage value, and acquiring the residual running mileage according to the residual abrasion loss and the average value of the abrasion loss of the friction plate of the whole vehicle.
Specifically, in the implementation of the present application, the controller 20 obtains the vehicle driving mileage information through the CAN network, calculates and obtains the average value of the abrasion loss of the friction plate of the whole vehicle with a certain threshold mileage value, converts the residual abrasion loss into the residual running mileage through the average value of the abrasion loss of the friction plate of the whole vehicle, and then sends the residual running mileage to the information management unit 40 through the gateway 30, so that the driver CAN check the residual running mileage of the friction plate conveniently.
In some embodiments, the method for monitoring the total wear of the inner friction plate and the outer friction plate and the wear of the inner friction plate of any one floating caliper disc brake 200 in a vehicle further comprises the following steps:
in step S300, the number of braking times after the vehicle is started reaches a set threshold value, and the vehicle speed is greater than the threshold vehicle speed and runs for a preset time, so as to avoid the fluctuation of the abrasion loss data acquisition caused by environmental conditions and vibration, thereby improving the detection accuracy of the detection device 10.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (14)
1. 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 move in a telescopic manner relative to the caliper body bracket and drive the inner friction plate and the outer friction plate to clamp a brake disc; characterized by comprising the following steps:
the detection device is matched and connected to the floating caliper disc brake and is used for monitoring the total abrasion loss of the inner friction plate and the outer friction plate and the abrasion loss of the inner friction plate on any floating caliper disc brake in a vehicle; a kind of electronic device with high-pressure air-conditioning system
The controller is in communication connection with the detection device and is used for acquiring the abrasion loss difference value of the inner friction plate and the outer friction plate according to the total abrasion loss and the abrasion loss of the inner friction plate and determining the fault type of the friction plate according to the comparison of the abrasion loss difference value and a preset abrasion threshold value;
the preset wear threshold comprises a first fault threshold and a second fault threshold;
when the wear amount difference is greater than or equal to the first failure threshold and less than or equal to the second failure threshold, the controller determines that the failure type of the friction plate is friction plate eccentric wear;
and when the abrasion loss difference value is larger than the second fault threshold value, the controller determines that the fault type of the friction plate is friction plate falling.
2. The friction plate wear monitoring system of a floating caliper disc brake according to claim 1, wherein the controller is further configured to obtain a remaining wear amount of the inner and outer friction plates based on a difference between an initial thickness of the friction plates of the inner and outer friction plates and the total wear amount, and further determine that a failure type of the friction plates is friction plate wear based on a comparison of the remaining wear amount with a preset wear threshold.
3. The friction plate wear monitoring system of a floating caliper disc brake of claim 2, wherein the preset wear threshold further comprises a third failure threshold, the third failure threshold comprising an early warning threshold and an alarm threshold;
when the residual abrasion loss is larger than the alarm threshold and smaller than or equal to the early warning threshold, the controller generates friction plate abrasion reminding information;
and when the residual abrasion loss difference value is smaller than or equal to the alarm threshold value, the controller generates a friction plate replacement reminding message.
4. A friction plate wear monitoring system of a floating caliper disc brake according to claim 3, 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.
5. A friction plate wear monitoring system of a floating caliper disc brake according to claim 3, wherein when the residual wear amount of one of two coaxially arranged floating caliper disc brakes is equal to or smaller than the alarm threshold value, the controller acquires the smallest one of the two floating caliper disc brakes on the other shaft adjacent thereto, and calculates a difference value of the residual wear amounts of both;
and the controller is also used for generating the replacement reminding information of the inner friction plate and the outer friction plate in the floating caliper disc brake on all the adjacent shafts when the difference value is smaller than the shaft end difference threshold value.
6. The friction plate wear monitoring system of the floating caliper disc brake according to claim 2, wherein the controller is further configured to obtain vehicle mileage information and calculate an average value of a total vehicle friction plate wear amount for obtaining a certain threshold mileage value, and obtain a remaining running mileage according to the average value of the remaining wear amount and the total vehicle friction plate wear amount.
7. The friction plate wear monitoring system of a floating caliper disc brake according to claim 1, wherein the controller is further configured to control the detection device to be activated after the number of braking times after activation reaches a set threshold and the vehicle speed is greater than a threshold vehicle speed and travels for a preset time.
8. A method for monitoring friction plate wear of a floating caliper disc brake, comprising:
monitoring total abrasion loss of an inner friction plate and an outer friction plate of any floating caliper disc brake in a vehicle and abrasion loss of the inner friction plate;
acquiring 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;
the preset wear threshold comprises a first fault threshold and a second fault threshold; acquiring a wear amount difference value of the inner friction plate and the outer friction plate according to the total wear amount 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 wear amount difference value and a preset wear threshold value specifically comprises the following steps:
when the wear amount 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 friction plate eccentric wear;
and when the abrasion loss difference value is larger than the second fault threshold value, the fault type of the friction plate is friction plate falling.
9. The method for monitoring friction plate wear of a floating caliper disc brake according to claim 8, further comprising:
and obtaining the residual abrasion loss of the inner friction plate and the outer friction plate according to the difference value 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 of the residual abrasion loss and a preset abrasion threshold value.
10. The method for monitoring friction plate wear of a floating caliper disc brake according to claim 9, wherein the preset wear threshold further comprises a third failure threshold, the third failure threshold comprising an early warning threshold and an alarm threshold;
when the residual abrasion loss is larger than the alarm threshold and smaller than or equal to the early warning threshold, friction plate abrasion reminding information is generated;
and when the residual abrasion loss difference value is smaller than or equal to the alarm threshold value, generating friction plate replacement reminding information.
11. The method for monitoring friction plate wear of a floating caliper disc brake according to claim 10, further comprising:
and acquiring the historical reference voltage of the last friction plate after replacing the new 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.
12. The method for monitoring friction plate wear of a floating caliper disc brake according to claim 10, 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 smallest residual abrasion loss of the two floating caliper disc brakes on the other shaft adjacent to the one floating caliper disc brake, and calculating to obtain the difference value of the residual abrasion loss of the two floating caliper disc brakes;
and when the difference value is smaller than the shaft end difference threshold value, generating the replacement information of the inner friction plate and the outer friction plate in all the floating caliper disc brakes on the two adjacent shafts.
13. The method for monitoring friction plate wear of a floating caliper disc brake according to claim 9, further comprising:
and acquiring vehicle driving mileage information, calculating an average value of the abrasion loss of the friction plate of the whole vehicle, which is used for acquiring a certain threshold mileage value, and acquiring the residual running mileage according to the residual abrasion loss and the average value of the abrasion loss of the friction plate of the whole vehicle.
14. The method for monitoring the abrasion loss of the friction plate of the floating caliper disc brake according to claim 8, wherein the method for monitoring the total abrasion loss of the inner friction plate and the outer friction plate and the abrasion loss of the inner friction plate of any floating caliper disc brake in a vehicle further comprises the steps of:
the number of times of braking of the vehicle after starting reaches a set threshold value, and the vehicle speed is greater than the threshold vehicle speed and 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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| EP0567155A1 (en) * | 1992-04-24 | 1993-10-27 | DEUTSCHE PERROT-BREMSE GmbH | Wear surveillance device for a sliding caliper disc brake |
| JP2000161404A (en) * | 1998-11-20 | 2000-06-16 | Nec Corp | Automobile brake pad remaining amount detecting device |
| 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 |
| CN113586635A (en) * | 2021-07-30 | 2021-11-02 | 的卢技术有限公司 | Brake pad wear monitoring active early warning system, method, vehicle and storage medium |
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2021
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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 |
| JP2000161404A (en) * | 1998-11-20 | 2000-06-16 | Nec Corp | Automobile brake pad remaining amount detecting device |
| 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 |
| CN113586635A (en) * | 2021-07-30 | 2021-11-02 | 的卢技术有限公司 | Brake pad wear monitoring active early warning system, method, vehicle and storage medium |
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