CN116538219A - Method and device for estimating wear of brake pad of electrohydraulic brake system - Google Patents
Method and device for estimating wear of brake pad of electrohydraulic brake system Download PDFInfo
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- CN116538219A CN116538219A CN202310092463.4A CN202310092463A CN116538219A CN 116538219 A CN116538219 A CN 116538219A CN 202310092463 A CN202310092463 A CN 202310092463A CN 116538219 A CN116538219 A CN 116538219A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000005299 abrasion Methods 0.000 claims abstract description 52
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000004364 calculation method Methods 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 12
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Classifications
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/06—Multi-objective optimisation, e.g. Pareto optimisation using simulated annealing [SA], ant colony algorithms or genetic algorithms [GA]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/04—Ageing analysis or optimisation against ageing
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a method, a device, equipment and a storage medium for estimating the abrasion of a brake pad of an electrohydraulic braking system, and belongs to the technical field of automobile fault diagnosis. The method comprises the following steps: after a new brake pad is installed, acquiring data such as brake time, brake pressure, brake distance and the like of a vehicle in the running process, inputting a brake pad abrasion estimation model, and calculating a maximum abrasion coefficient; then input it into the remaining travel distance of the brake padSCalculating the residual driving model of the vehicleA distance; calculating the wear coefficient during the running of the automobileKWhen (when)K>0.9KmaxAnd judging that the brake pad needs to be replaced, and pushing the message to the vehicle owner. The invention can accurately estimate the abrasion condition and the residual driving distance of the brake pad and accurately remind the replacement and maintenance of the brake pad of the automobile.
Description
Technical Field
The invention belongs to the technical field of automobile fault diagnosis, and particularly relates to a method, a device, equipment and a storage medium for estimating brake pad abrasion of an electrohydraulic braking system.
Background
Most current vehicles employ electro-hydraulic braking systems by which the vehicle is driven to brake. Compared with the traditional mechanical braking, the hydraulic braking has the advantages of fewer faults, fewer mechanical force losses, quicker transmission and good braking effect. However, the electro-hydraulic braking system also needs to replace worn brake pads in time so as to ensure driving safety.
The replacement maintenance of the automobile brake pad is generally carried out according to the read meter mileage data and maintenance time by a first-come principle or by reminding of replacement due. However, in practice, the 4S store/repair shop has great difficulty in maintaining the customer' S maintenance cycle. Currently, a 4S shop/repair shop roughly estimates whether a vehicle needs maintenance according to a maintenance time set for the vehicle, and then lets a customer service person call to prompt a customer to return to the shop for maintenance according to the rough time. However, the reminding maintenance is inaccurate, most of the time, the vehicle does not reach the kilometer number of maintenance, and the brake pad is replaced in advance, so that the cost of a vehicle owner is increased, and certain waste is caused.
Aiming at the situation, how to accurately estimate the abrasion condition of the brake pad and the residual driving distance, and giving the vehicle owner accurate maintenance time is a technical problem which needs to be solved urgently.
Disclosure of Invention
In order to solve the technical problems, the invention provides a brake pad abrasion estimation method, a device, equipment and a storage medium of an electrohydraulic brake system, which can accurately estimate the abrasion condition and the residual driving distance of the brake pad and accurately remind the replacement and maintenance of the brake pad of an automobile.
In a first aspect, the invention provides a method for estimating wear of a brake pad of an electrohydraulic brake system, comprising the steps of:
(1) After the new brake pad is installed, the current driving mileage S0 of the automobile ECU is obtained, and the initial effective thickness l0 of the brake pad is measured; judging whether the vehicle is empty or light according to the vehicle brake data;
(2) If the vehicle is judged to be in idle or light load running, the step of obtaining the brake data under the three groups of initial speeds comprises the following steps: the three groups of initial speeds are a first speed V1, a second speed V2 and a third speed V3 respectively, and V1 is more than V2 and more than V3;
(3) Respectively taking the three groups of brake data in the step (2) into a brake pad abrasion estimation model, taking an average value, and calculating an initial value K0 of a brake pad abrasion coefficient;
(4) When the automobile runs for X1 km, repeating the steps (2) and (3) to estimate the current brake pad abrasion coefficient value K1, simultaneously measuring the current effective thickness l1 of the brake pad, calculating the brake pad abrasion thickness delta l1 = l0-l1, and estimating the maximum brake pad abrasion coefficient Kmax = K1X l 0/delta l1;
(5) When the automobile continues to run for X2 km, repeating the steps (2) and (3) to estimate the current brake pad abrasion coefficient value K2, simultaneously measuring the current effective thickness l2 of the brake pad, calculating the brake pad abrasion thickness delta l2=l0-l 2, calibrating and correcting the estimated brake pad maximum abrasion coefficient Kmax=K2×l0/delta l2,
(6) The calculated data is brought into a prediction model of the residual running distance S of the brake pad, and the residual running distance S is calculated;
(7) And (3) in the running process of the automobile, repeating the steps (2) and (3) to calculate the abrasion coefficient K of the brake pad, and when K is more than 0.9Kmax, judging that the brake pad needs to be replaced and pushing the message to the automobile owner.
In a further technical scheme, in the step (3), the brake pad wear estimation model is as follows:
wherein K is the brake pad wear coefficient, L is the braking distance, P is the braking pressure, and V is the initial braking speed. The calculation method of the initial value K0 of the brake pad wear coefficient comprises the following steps:
K0＝(K01+K02+K03)/3。
in a further technical scheme, in the step (2), the brake data of the first speed V1, the second speed V2 and the third speed V3 are respectively: (L1, P1, T1), (L2, P2, T2), (L3, P3, T3).
In a further technical scheme, in the step (4), after the new brake pad of the automobile runs for X1 km, three sets of brake data under three initial speeds (a first speed V1, a second speed V2 and a third speed V3) in no-load or light-load conditions: (L4, P4, T4), (L5, P5, T5), (L6, P6, T6);
the calculation method of the brake pad abrasion coefficient value K1 comprises the following steps:
K1＝(K11+K12+K13)/3；
in the step (5), after the new brake pad of the automobile runs for X2 km, three sets of brake data at three initial speeds (a first speed V1, a second speed V2 and a third speed V3) under no load or light load: (L7, P7, T7), (L8, P8, T8), (L9, P9, T9);
the calculation method of the brake pad abrasion coefficient value K2 comprises the following steps:
K2＝(K21+K22+K23)/3。
according to a further technical scheme, a prediction model of the residual running distance S of the brake pad is as follows:
according to a further technical scheme, the method for judging whether the vehicle is unloaded or lightly loaded comprises the following steps of:
1) acquiring three sets of brake data (L01, P01, T01), (L02, P02, T02), (L03, P03, T03) at three vehicle speeds (first speed V1, second speed V2 and third speed V3) when the vehicle is lightly loaded or unloaded;
2) Calculating a mass coefficient M0 of the vehicle in no-load or light-load state, and storing the mass coefficient M0 into a lower computer memory, wherein the mass coefficient M0 calculates a model:
M0＝(M01+M02+M03)/3；
3) Acquiring brake data (L, P, T) at a current vehicle speed V, and calculating a current vehicle mass coefficient M:
4) And when M <1.2M0, judging that the current vehicle is empty or light-load.
According to a further technical scheme, X1 is 1 ten thousand kilometers, and X2 is 1 ten thousand kilometers. Brake pad data and automobile brake data can be obtained through an OBDII interface.
In a second aspect, the present invention provides a brake pad wear estimation device for an electrohydraulic brake system, comprising:
the communication module acquires data streams of brake block data and automobile brake data and transmits the data streams to the signal processing module; the signal processing module is used for processing the data flow of the brake block data and the automobile brake data and the waveform data of the sensor, and transmitting the specific values of the pressure, the speed and the distance to the MCU computing module after obtaining the specific values.
The MCU calculation module calculates the brake pad abrasion coefficient through a brake pad abrasion estimation model according to the brake pad data and the automobile brake data, and calculates the brake pad residual travel distance S through a prediction model of the brake pad residual travel distance S;
and the reminding module is used for comparing the current wear coefficient of the automobile with the maximum wear coefficient of the automobile and sending a comparison result to the terminal or the diagnostic instrument.
In a third aspect, the present invention provides an electro-hydraulic brake system brake pad wear estimation apparatus, the apparatus comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the method for estimating brake pad wear of an electrohydraulic brake system as described above.
In a fourth aspect, the present invention provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method for estimating brake pad wear of an electro-hydraulic brake system as described above.
Advantageous effects
1. The method for estimating the wear of the brake pad of the electrohydraulic brake system can be used for detecting the wear of the brake pad at any time when a vehicle runs, and does not need to go to a 4S/maintenance shop for detection, so that the cost is low and the detection efficiency is high.
2. The invention can prompt and alarm abnormal conditions of the abrasion of the brake pad of the commercial vehicle, and can upload data to the terminal in real time according to the requirement, such as a vehicle diagnosis management platform of an enterprise, and the enterprise diagnosis management platform can also inquire the running state of the vehicle, so that the enterprise can monitor the running data of the commercial vehicle under the enterprise in real time, the abrasion condition of the brake pad of the vehicle can be detected, the running data of the speed, the position and the like of the vehicle and the diagnosis data of the engine state and the like can be detected, and the vehicle safety running management level of the logistics enterprise is greatly improved.
3. According to the brake pad abrasion estimation model, the dynamic data of the vehicle during braking is collected in real time, and the brake pad abrasion coefficient model and the vehicle-mounted quality model are built by utilizing the dynamic principle, so that the real-time online estimation of the vehicle brake pad abrasion and the vehicle load is carried out, the detection efficiency is high, and the data accuracy is high. The estimation method is simple, and after the brake pad is replaced, the brake pad wear estimation can be automatically carried out in daily use only by collecting three acceleration data of the vehicle in no-load or light-load as model training data.
4. The invention adopts a random sampling method to judge the threshold alarming parameters, is sensitive to data and is beneficial to improving the accuracy of judging the data. The two groups of data with different quality are used in a cross mode in the calculation model, so that the correlation of the data is weaker, and the accuracy of the solution can be improved.
Drawings
FIG. 1 is a flow chart of brake pad wear estimation for an electro-hydraulic brake system provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a brake pad wear estimation device of an electrohydraulic brake system according to an embodiment of the present invention.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, unless the context clearly indicates otherwise, the singular forms also are intended to include the plural forms, and furthermore, it is to be understood that the terms "comprises" and "comprising" and any variations thereof are intended to cover non-exclusive inclusions, such as, for example, processes, methods, systems, products or devices that comprise a series of steps or units, are not necessarily limited to those steps or units that are expressly listed, but may include other steps or units that are not expressly listed or inherent to such processes, methods, products or devices.
Example 1
As shown in fig. 1, a method for estimating wear of a brake pad of an electrohydraulic brake system includes the following steps:
(1) After the new brake pad is installed, the current driving mileage S0 of the automobile ECU is obtained, and the initial effective thickness l0 of the brake pad is measured; judging whether the vehicle is empty or light according to the vehicle brake data;
(2) If the vehicle is judged to be in idle or light load running, the step of obtaining the brake data under the three groups of initial speeds comprises the following steps: the three groups of initial speeds are a first speed V1, a second speed V2 and a third speed V3 respectively, and V1 is more than V2 and more than V3;
the brake data of the first speed V1, the second speed V2 and the third speed V3 are respectively: (L1, P1, T1), (L2, P2, T2), (L3, P3, T3);
(3) Respectively taking the three groups of brake data in the step (2) into a brake pad abrasion estimation model, taking an average value, and calculating an initial value K0 of a brake pad abrasion coefficient;
the brake pad wear estimation model is as follows:
wherein K is the abrasion coefficient of the brake pad, L is the braking distance, P is the braking pressure, and V is the initial braking speed; the initial value K0 of the brake pad wear coefficient is calculated as follows:
K0＝(K01+K02+K03)/3。
(4) When the automobile runs for X1 km, repeating the steps (2) and (3) to estimate the current brake pad abrasion coefficient value K1, simultaneously measuring the current effective thickness l1 of the brake pad, calculating the brake pad abrasion thickness delta l1 = l0-l1, and estimating the maximum brake pad abrasion coefficient Kmax = K1X l 0/delta l1;
the calculation method of the brake pad abrasion coefficient value K1 comprises the following steps: after the new brake pad of the automobile runs for X1 km, three groups of brake data under three initial speeds (a first speed V1, a second speed V2 and a third speed V3) in no-load or light load are obtained: (L4, P4, T4), (L5, P5, T5), (L6, P6, T6); respectively inputting the brake pad wear estimation models, and taking an average value, wherein the specific calculation process is as follows:
K1＝(K11+K12+K13)/3。
(5) And (3) after the automobile continues to run for X2 km, repeating the steps (2) and (3) to estimate the current brake pad wear coefficient value K2, simultaneously measuring the current effective thickness l2 of the brake pad, calculating the brake pad wear thickness delta l2=l0-l 2, and calibrating and correcting the estimated brake pad maximum wear coefficient Kmax=K2×l0/delta l2.
The calculation method of the brake pad abrasion coefficient value K2 comprises the following steps: after the new brake pad of the automobile runs for X2 km, three groups of brake data under three initial speeds (a first speed V1, a second speed V2 and a third speed V3) in no-load or light load are obtained: (L7, P7, T7), (L8, P8, T8), (L9, P9, T9); respectively inputting the brake pad abrasion estimation models, and taking an average value, wherein the specific calculation process is as follows:
K2＝(K21+K22+K23)/3。
(6) And (3) introducing the calculated data into a prediction model of the residual running distance S of the brake pad:calculating a remaining driving distance S;
(7) And (3) in the running process of the automobile, repeating the steps (2) and (3) to calculate the abrasion coefficient K of the brake pad, and when K is more than 0.9Kmax, judging that the brake pad needs to be replaced and pushing the message to the automobile owner.
The judging method for whether the vehicle is unloaded or lightly loaded comprises the following steps:
1) acquiring three sets of brake data (L01, P01, T01), (L02, P02, T02), (L03, P03, T03) at three vehicle speeds (first speed V1, second speed V2 and third speed V3) when the vehicle is lightly loaded or unloaded;
2) Calculating a mass coefficient M0 of the vehicle in no-load or light-load state, and storing the mass coefficient M0 into a lower computer memory, wherein the mass coefficient M0 calculates a model:
M0＝(M01+M02+M03)/3；
3) Acquiring brake data (L, P, T) at a current vehicle speed V, and calculating a current vehicle mass coefficient M:
4) And when M <1.2M0, judging that the current vehicle is empty or light-load.
X1 is 1 ten thousand kilometers, and X2 is 1 ten thousand kilometers. Brake pad data and automobile brake data can be obtained through an OBDII interface.
Example two
As shown in fig. 2, a brake pad wear estimation device of an electrohydraulic brake system includes:
the communication module acquires data streams of brake block data and automobile brake data and transmits the data streams to the signal processing module; the signal processing module is used for processing the data flow of the brake block data and the automobile brake data and the waveform data of the sensor, and transmitting the specific values of the pressure, the speed and the distance to the MCU computing module after obtaining the specific values.
The MCU calculation module calculates the brake pad abrasion coefficient through a brake pad abrasion estimation model according to the brake pad data and the automobile brake data, and calculates the brake pad residual travel distance S through a prediction model of the brake pad residual travel distance S;
and the reminding module is used for comparing the current wear coefficient of the automobile with the maximum wear coefficient of the automobile and sending a comparison result to the terminal or the diagnostic instrument. The comparison result can be pushed to a terminal, such as a vehicle owner terminal or other management platforms, through a 4G/5G communication module, or pushed to a diagnostic instrument for display through serial communication.
Example III
An electrohydraulic brake system brake pad wear estimation device, the device comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program configured to implement the method of embodiment one.
It should be appreciated that in this embodiment, the memory may include read only memory and random access memory, and provide instructions and data to the processor, and that a portion of the memory may also include non-volatile random access memory. For example, the memory may also store information of the device type.
The processor may be a central processing unit CPU, but the processor may also be other general purpose processors, digital signal processors DSP, application specific integrated circuits ASIC, off-the-shelf programmable gate array FPGA or other programmable logic device, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
A computing program (also referred to as a program, software application, or code) includes machine instructions for a programmable processor, and may be implemented using a high-level procedural and/or object-oriented programming language, and/or an assembly/machine language.
In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software.
The method in the first embodiment may be directly implemented as a hardware processor executing or implemented by a combination of hardware and software modules in the processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art.
Example IV
A storage medium having stored thereon a computer program which, when executed by a processor, implements the method of embodiment one.
The storage medium includes: u disk, mobile hard disk, read-only memory (ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
Those of ordinary skill in the art will appreciate that the methodologies of the examples described in connection with the present embodiments can be implemented as electronic hardware or as a combination of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The above embodiments do not limit the scope of the application. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application are intended to be included within the scope of the present application.
Claims (10)
1. The method for estimating the wear of the brake pad of the electrohydraulic brake system is characterized by comprising the following steps of:
(1) After the new brake pad is installed, the current driving mileage S0 of the automobile ECU is obtained, and the initial effective thickness l0 of the brake pad is measured; judging whether the vehicle is empty or light according to the vehicle brake data;
(2) If the vehicle is judged to be in idle or light load running, the step of obtaining the brake data under the three groups of initial speeds comprises the following steps: the three groups of initial speeds are a first speed V1, a second speed V2 and a third speed V3 respectively, and V1 is more than V2 and more than V3;
(3) Respectively taking the three groups of brake data in the step (2) into a brake pad abrasion estimation model, taking an average value, and calculating an initial value K0 of a brake pad abrasion coefficient;
(4) When the automobile runs for X1 km, repeating the steps (2) and (3) to estimate the current brake pad abrasion coefficient value K1, simultaneously measuring the current effective thickness l1 of the brake pad, calculating the brake pad abrasion thickness delta l1 = l0-l1, and estimating the maximum brake pad abrasion coefficient Kmax = K1X l 0/delta l1;
(5) When the automobile continues to run for X2 km, repeating the steps (2) and (3) to estimate the current brake pad abrasion coefficient value K2, simultaneously measuring the current effective thickness l2 of the brake pad, calculating the brake pad abrasion thickness delta l2=l0-l 2, calibrating and correcting the estimated brake pad maximum abrasion coefficient Kmax=K2×l0/delta l2,
(6) The calculated data is brought into a prediction model of the residual running distance S of the brake pad, and the residual running distance S is calculated;
(7) And (3) in the running process of the automobile, repeating the steps (2) and (3) to calculate the abrasion coefficient K of the brake pad, and when K is more than 0.9Kmax, judging that the brake pad needs to be replaced and pushing the message to the automobile owner.
2. The method for estimating wear of a brake pad of an electrohydraulic brake system according to claim 1, wherein in said step (3), the model for estimating wear of a brake pad is:
wherein K is the abrasion coefficient of the brake pad, L is the braking distance, P is the braking pressure, and V is the initial braking speed;
the calculation method of the initial value K0 of the brake pad wear coefficient comprises the following steps:
K0＝(K01+K02+K03)/3。
3. the method for estimating wear of a brake pad of an electrohydraulic brake system according to claim 1, wherein in said step (2), the brake data of the first speed V1, the second speed V2, and the third speed V3 are respectively: (L1, P1, T1), (L2, P2, T2), (L3, P3, T3).
4. The method for estimating wear of brake pads of an electrohydraulic brake system according to claim 2, wherein in said step (4), three sets of brake data at three initial speeds (first speed V1, second speed V2, and third speed V3) at no load or light load after the new brake pad of an automobile is driven for X1 km: (L4, P4, T4), (L5, P5, T5), (L6, P6, T6);
the calculation method of the brake pad abrasion coefficient value K1 comprises the following steps:
K1＝(K11+K12+K13)/3；
in the step (5), after the new brake pad of the automobile runs for X2 km, three sets of brake data at three initial speeds (a first speed V1, a second speed V2 and a third speed V3) under no load or light load: (L7, P7, T7), (L8, P8, T8), (L9, P9, T9);
the calculation method of the brake pad abrasion coefficient value K2 comprises the following steps:
K2＝(K21+K22+K23)/3。
5. the method for estimating wear of a brake pad of an electrohydraulic brake system according to claim 1, wherein the prediction model of the remaining running distance S of the brake pad is:
6. the method for estimating wear of a brake pad of an electrohydraulic brake system according to claim 1, wherein the method for judging whether the vehicle is idling or lightly loaded is as follows:
1) acquiring three sets of brake data (L01, P01, T01), (L02, P02, T02), (L03, P03, T03) at three vehicle speeds (first speed V1, second speed V2 and third speed V3) when the vehicle is lightly loaded or unloaded;
2) Calculating a mass coefficient M0 of the vehicle in no-load or light-load state, and storing the mass coefficient M0 into a lower computer memory, wherein the mass coefficient M0 calculates a model:
M0＝(M01+M02+M03)/3；
3) Acquiring brake data (L, P, T) at a current vehicle speed V, and calculating a current vehicle mass coefficient M:
4) And when M <1.2M0, judging that the current vehicle is empty or light-load.
7. The method for estimating brake pad wear of an electro-hydraulic brake system according to claim 1, wherein X1 is 1 km and X2 is 1 km.
8. An electrohydraulic brake system brake pad wear estimation device, characterized in that: comprising the following steps:
the communication module acquires data streams of brake block data and automobile brake data and transmits the data streams to the signal processing module;
the signal processing module is used for processing the data flow of the brake block data and the automobile brake data and the waveform data of the sensor, and transmitting the specific values of the pressure, the speed and the distance to the MCU computing module after obtaining the specific values.
The MCU calculation module calculates the brake pad abrasion coefficient through a brake pad abrasion estimation model according to the brake pad data and the automobile brake data, and calculates the brake pad residual travel distance S through a prediction model of the brake pad residual travel distance S;
and the reminding module is used for comparing the current wear coefficient of the automobile with the maximum wear coefficient of the automobile and sending a comparison result to the terminal or the diagnostic instrument.
9. An electro-hydraulic brake system brake pad wear estimation apparatus, the apparatus comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program configured to implement the electro-hydraulic brake system brake pad wear estimation method of any one of claims 1 to 7.
10. A storage medium having stored thereon a computer program which, when executed by a processor, implements the brake pad wear estimation method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117087639A (en) * | 2023-08-22 | 2023-11-21 | 山东北骏重工有限公司 | Small-size underground dumper brake safety control system based on big data |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117087639A (en) * | 2023-08-22 | 2023-11-21 | 山东北骏重工有限公司 | Small-size underground dumper brake safety control system based on big data |
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