CN109572710B - Method and device for detecting wear loss of clutch driven disc - Google Patents
Method and device for detecting wear loss of clutch driven disc Download PDFInfo
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- CN109572710B CN109572710B CN201811534496.5A CN201811534496A CN109572710B CN 109572710 B CN109572710 B CN 109572710B CN 201811534496 A CN201811534496 A CN 201811534496A CN 109572710 B CN109572710 B CN 109572710B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
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Abstract
The application provides a method and a device for detecting the abrasion loss of a clutch driven disc, wherein the method comprises the following steps: acquiring preset parameters based on clutch self-learning, wherein the preset parameters are used for representing the position information of a driven disc when the clutch cuts off or transmits the power input from an engine to a transmission; acquiring a preset calibration value matched with the preset parameter; calculating to obtain a difference value between the preset parameter and a preset calibration value, and recording as an actual difference value; calculating the ratio of the actual difference to the lever ratio of the clutch control mechanism, and recording the ratio as an actual ratio; judging whether the actual ratio is larger than a preset calibration ratio or not; when the actual ratio is larger than the calibration ratio, prompt information used for representing excessive loss of the driven plate is output, and early warning is carried out on a user when the clutch driven plate is excessively worn.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method and a device for detecting the abrasion loss of a clutch driven disc.
Background
In a vehicle using the clutch, a user needs to frequently use the clutch in the processes of shifting, starting, and the like of a traffic light, due to frequent separation and combination of the clutch, the clutch driven disc of the clutch can be worn to a certain extent when the user uses the clutch every time, and when the wear loss reaches the preset allowable wear loss, the driven disc can be considered to reach the scrapped condition and needs to be replaced by a new driven disc. However, in the actual use process of the vehicle, due to the influence of factors such as different driving habits of drivers, different road conditions in different areas and the like, the wear degree of the driven disc cannot be singly judged by using the service time, and when the wear amount of the driven disc exceeds the preset allowable wear amount, the driven disc continues to be used, so that the static friction coefficient of the driven disc is reduced, the torque transmission capability is reduced, and the dynamic property of the whole vehicle is influenced. And the clutch pressure plate and the end face of the flywheel can also be abraded in an accelerated manner, so that a mirror surface is generated, and the maintenance cost of the whole automobile is increased.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and an apparatus for detecting a wear amount of a clutch driven plate, so as to remind a user in time when the driven plate is excessively worn.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a method for detecting the abrasion loss of a clutch driven plate comprises the following steps:
acquiring preset parameters based on clutch self-learning, wherein the preset parameters are used for representing the position information of a driven disc when the clutch cuts off or transmits the power input from an engine to a transmission;
acquiring a preset calibration value matched with the preset parameter;
calculating to obtain a difference value between the preset parameter and a preset calibration value, and recording as an actual difference value;
calculating the ratio of the actual difference to the lever ratio of the clutch control mechanism, and recording the ratio as an actual ratio;
judging whether the actual ratio is larger than a preset calibration ratio or not;
and when the actual ratio is larger than the calibrated ratio, outputting prompt information for representing excessive loss of the driven disc.
Preferably, in the method for detecting the wear loss of the clutch driven disc, the preset parameter is a number value of a sliding mode point, a minimum combination position or a maximum separation position obtained based on self-learning of the clutch;
the minimum combination position refers to the position of the clutch driven plate when the clutch driven plate, the clutch pressure plate and the clutch flying plate are in complete contact;
the maximum disengaged position refers to the clutch disk position when the clutch disk, clutch pressure plate, and clutch flyer are fully disengaged.
Preferably, the method for detecting an amount of wear of the clutch driven plate further includes:
acquiring historical driving road information of a vehicle;
extracting the proportion of the slope road in the historical driving road;
acquiring a calibration coefficient matched with the proportion of the slope road according to a first preset mapping table;
and calibrating the preset calibration value according to the calibration coefficient.
Preferably, in the method for detecting a wear amount of a clutch driven plate, after determining that the actual ratio is greater than the calibration ratio, the method further includes:
acquiring a current road on which a vehicle runs based on an electronic map;
judging whether a slope with a slope value larger than a preset value exists in the vehicle running direction and within a preset distance before the current position of the vehicle, and if so, acquiring the slope value of the slope;
acquiring a slope starting calibration ratio corresponding to the slope value based on a second preset mapping table;
judging whether the actual ratio is larger than the hill start calibration ratio or not;
and when the actual ratio is larger than the hill start calibration ratio, outputting prompt information for prompting a user to prohibit parking on a front slope.
Preferably, in the method for detecting the wear amount of the clutch driven disc, the calculating to obtain the difference between the preset parameter and a preset calibration value includes:
recording preset parameters obtained based on clutch self-learning as current preset parameters;
acquiring historical data obtained by self-learning of the clutch;
acquiring N preset parameters which are positioned before the current preset parameter on a time axis from the historical data, wherein N is a positive integer not less than 1;
calculating the average value of the current preset parameter and the N preset parameters;
and calculating to obtain a difference value between the average value and the preset calibration value, and recording as an actual difference value.
A clutch driven plate wear amount detection device comprising:
the parameter acquisition unit is used for acquiring preset parameters based on clutch self-learning, and the preset parameters are used for representing the position information of the driven disc when the clutch cuts off or transmits the power input from the engine to the transmission;
the difference value calculating unit is used for acquiring a preset calibration value matched with the preset parameter, calculating to obtain a difference value between the preset parameter and the preset calibration value, and recording the difference value as an actual difference value;
the abrasion loss judging unit is used for calculating the ratio of the actual difference value to the lever ratio of the clutch operating mechanism, recording the ratio as an actual ratio, and judging whether the actual ratio is larger than a preset calibration ratio or not; and when the actual ratio is larger than the calibrated ratio, outputting prompt information for representing excessive loss of the driven disc.
Preferably, in the device for detecting a wear amount of a clutch driven plate, the parameter acquisition unit is specifically configured to:
acquiring a sliding film point value, a minimum combination position or a maximum separation position based on clutch self-learning;
wherein the minimum combination position refers to the position of the clutch driven plate when the clutch driven plate, the clutch pressure plate and the clutch flying plate are completely contacted,
the maximum disengaged position refers to the clutch disk position when the clutch disk, clutch pressure plate, and clutch flyer are fully disengaged.
Preferably, the apparatus for detecting an amount of wear of a clutch disk further includes:
the calibration unit of the preset calibration value is used for acquiring historical driving road information of the vehicle; extracting the proportion of the slope road in the historical driving road; acquiring a calibration coefficient matched with the proportion of the slope road according to a first preset mapping table; and calibrating the preset calibration value according to the calibration coefficient.
Preferably, the apparatus for detecting an amount of wear of a clutch disk further includes:
a prediction unit for acquiring a current road on which the vehicle is traveling based on the electronic map; judging whether a slope with a slope value larger than a preset value exists in the vehicle running direction and within a preset distance before the current position of the vehicle, and if so, acquiring the slope value of the slope; acquiring a slope starting calibration ratio corresponding to the slope value based on a second preset mapping table; judging whether the actual ratio is larger than the hill start calibration ratio or not; and when the actual ratio is larger than the hill start calibration ratio, outputting prompt information for prompting a user to prohibit parking on a front slope.
Preferably, in the above apparatus for detecting a wear amount of a clutch driven disc, when the difference between the preset parameter and a preset calibration value is obtained through calculation, the difference calculation unit is specifically configured to:
recording preset parameters obtained based on clutch self-learning as current preset parameters;
acquiring historical data obtained by self-learning of the clutch;
acquiring N preset parameters which are positioned before the current preset parameter on a time axis from the historical data, wherein N is a positive integer not less than 1;
calculating the average value of the current preset parameter and the N preset parameters;
and calculating to obtain a difference value between the average value and the preset calibration value, and recording as an actual difference value.
Based on above-mentioned technical scheme, when using the technical scheme disclosed in the above-mentioned embodiment of this application to detect clutch driven plate wearing and tearing volume, acquire clutch self-learning result according to the settlement frequency, by preset parameter is transferred to the result that the clutch self-learned, calculates the difference of preset parameter and preset calibration value is calculating the ratio of difference and clutch operating mechanism lever ratio is judged the size of ratio and preset calibration ratio works as actual ratio is greater than during the calibration ratio, the prompt message that the output is used for the excessive loss of sign driven plate, when having realized that clutch driven plate wearing and tearing volume is excessive, the timing reminds the user to change the driven plate, has reduced the maintenance cost of whole car.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flowchart of a method for detecting a wear loss of a clutch driven plate according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart illustrating a method for detecting wear of a clutch disk according to another embodiment of the present disclosure;
FIG. 3 is a schematic flowchart of a method for detecting wear of a clutch driven plate according to still another embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a device for detecting the wear amount of a clutch driven plate according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, most of hybrid power systems in the market adopt an automatic clutch actuating mechanism, and a control end can monitor the position of the automatic clutch actuating mechanism in real time, so that the control of a clutch is more accurate. Meanwhile, a clutch self-learning function is added in a control strategy, the change of the engine rotating speed and the motor rotating speed is analyzed in the process of controlling the change of the position of the clutch, accurate real-time numerical values of the maximum separation position, the sliding mode point position and the minimum combination position of the clutch are judged based on the change of the engine rotating speed and the change of the motor rotating speed, and the numerical values of the key points are stored in a controller to be used as the calibration values of a clutch executing mechanism in the next time period.
In order to prevent the maintenance cost of the whole vehicle from increasing due to excessive wear of a clutch driven plate, the application discloses a method and a device for detecting the wear loss of the clutch driven plate based on self-learning of a clutch. Referring to fig. 1, a method for detecting a wear amount of a clutch driven plate disclosed in an embodiment of the present application may include:
step S101: acquiring preset parameters based on clutch self-learning, wherein the preset parameters are used for representing the position information of a driven disc when the clutch cuts off or transmits the power input from an engine to a transmission;
in the prior art, the learning result of the self-learning of the clutch stores various parameters, which are used for representing the position of the clutch actuator, and these parameters include parameters for representing the position information of the driven plate when the clutch cuts off or transmits the power input from the engine to the transmission, and the application may select one of these parameters as the preset parameter, for example, these parameters may be: the number value of the sliding mode points, the minimum combination position or the maximum separation position obtained based on the self-learning of the clutch can be other parameters; the minimum combination position refers to the position of the clutch driven plate when the clutch driven plate, the clutch pressure plate and the clutch flying plate are in complete contact; the maximum disengaged position refers to the clutch disk position when the clutch disk, clutch pressure plate, and clutch flyer are fully disengaged.
Step S102: acquiring a preset calibration value matched with the preset parameter;
in the technical scheme disclosed in the embodiment of the application, each preset parameter corresponds to a preset calibration value, and when the type of the preset parameter is determined, the preset calibration value is also determined.
Step S103: calculating to obtain a difference value between the preset parameter and a preset calibration value, and recording as an actual difference value;
in this step, the preset calibration value is subtracted from the preset parameter, and a difference between the preset parameter and the preset calibration value is calculated, and here, for convenience of subsequent introduction, the difference is named as an actual difference;
step S104: calculating the ratio of the actual difference to the lever ratio of the clutch control mechanism, and recording the ratio as an actual ratio;
in the technical scheme disclosed by the embodiment of the application, the lever ratio of the clutch operating mechanism is known data, when the size of the operating mechanism of the clutch is determined, the lever ratio is also determined, the data parameters can be stored in a memory in advance, and when the data is needed, the data is called. In this step, after the actual difference is calculated, the actual difference is divided by the lever ratio of the clutch operating mechanism, and the calculation result is recorded as an actual ratio. In the technical solution disclosed in the embodiment of the present application, it is necessary to calculate the ratio of the actual difference to the lever ratio because the lever ratios of the clutch operating mechanisms of different vehicles are not consistent, and the position information of the driven disc obtained by self-learning is related to the lever ratio of the clutch operating mechanism, so that it is difficult to truly express the wear amount of the driven disc by the actual difference. For example, two vehicles are detected, and the measured actual difference values are both a, but the lever ratio of the clutch operating mechanism of one vehicle is B, and the lever ratio of the clutch operating mechanism of the other vehicle is C, so that it can be known that although the measured actual difference values are both a, the wear amounts of the driven disks of the two vehicles are different, and therefore, the ratio of the actual difference values to the lever ratios needs to be calculated, and the calculated ratio is recorded as an actual ratio, which is the actual wear amount of the driven disks;
step S105: judging whether the actual ratio is larger than a preset calibration ratio or not, and executing the step S106 when the judgment result is yes;
the preset calibration ratio is a preset numerical value and is used for representing the maximum allowable wear degree of the driven disc, and when the wear amount of the driven disc exceeds the preset calibration ratio, a user needs to replace the driven disc;
step S106: outputting prompt information for representing excessive loss of the driven disc;
in this step, when the actual ratio is greater than the calibration ratio, a prompt message for representing excessive loss of the driven disk is output, where the type of the prompt message may be set according to design requirements, for example, the prompt message may be a voice prompt message, a light prompt message, or a prompt message that can be recognized by other users.
When using the technical scheme disclosed in the above-mentioned embodiment of this application to detect clutch driven plate wearing and tearing volume, obtain clutch self-learning result according to setting for the frequency, by it predetermines the parameter to transfer in the result that the clutch self-learned, calculates predetermine the difference of parameter and predetermined calibration value, is calculating the ratio of difference and clutch operating mechanism lever ratio is judged ratio and the size of predetermineeing the calibration ratio, works as actual ratio is greater than during the calibration ratio, the prompt message that the output is used for the excessive loss of sign driven plate has realized that clutch driven plate wearing and tearing volume is excessive when, reminds the user to change the driven plate regularly, has reduced the maintenance cost of whole car.
In the prior art, the life regions of users are different, the types of roads on which vehicles run are also different, for example, when the users frequently walk around mountain roads and sloping roads, because the vehicle is often started on a half slope during the running process, the safety factor of the driven disc is higher, namely, the maximum allowable abrasion loss of the driven disc of the vehicle which is often run on the road is smaller than the maximum allowable abrasion loss of the driven disc which is run on a flat road for a long time, aiming at the situation, in order to enable the preset calibration value for characterizing the maximum allowable wear amount of the driven disc to be adapted to users with different driving requirements, see fig. 2, the present application may also calibrate the preset calibration value by the method provided by fig. 2, specifically, before determining whether the actual ratio is greater than the preset calibration ratio, the method may further include:
step S201: acquiring historical driving road information of a vehicle;
the historical driving road information at least comprises road types of roads driven within the latest preset driving mileage of the user and lengths corresponding to the roads of each type, wherein the road types can be roughly divided into flat roads and slope roads, and the slope roads and the flat roads can be determined by the following steps: on the basis of the difference value of the highest altitude and the lowest altitude of the road driven by the electronic map in a unit distance, determining whether the road belongs to a slope road or a flat road on the basis of the difference value of the highest altitude and the lowest altitude of the road driven by the electronic map;
step S202: extracting the proportion of the slope road in the historical driving road;
in actual use, the larger the proportion of the slope road in the historical driving road of the user is, the higher the reliability of the user to the driven disc is, namely, the smaller the maximum abrasion loss of the driven disc is, therefore, in the step, the requirement of the reliability of the driven disc by the user is determined according to the proportion of the slope road;
step S203: acquiring a calibration coefficient matched with the proportion of the slope road according to a first preset mapping table;
in the technical scheme disclosed in the embodiment of the application, a first preset mapping table can be preset, the first preset mapping table is used for storing the mapping relation between the proportion of the slope road in the historical driving road and the calibration coefficient of the preset calibration value, and under the condition that the proportion of the slope road is known, the calibration coefficient can be obtained in a table look-up mode through the first preset mapping table.
Step S204: calibrating the preset calibration value according to the calibration coefficient;
in this step, the preset calibration value is calibrated based on the calibration coefficient, and the preset calibration value is adjusted to be larger or smaller according to the proportion of the slope, so that the size of the preset calibration value can be matched with the type of the road driven by the user, and different preset calibration values can be matched for users with different requirements.
Further, in the technical solution disclosed in the embodiment of the present application, in order to reduce the calculation amount of the system, the preset calibration value may be calibrated according to a preset period, that is, the preset calibration value is calibrated once based on the scheme disclosed in the embodiment of fig. 2 every other set period, at this time, in executing the technical solution disclosed in the embodiment of fig. 1, it is sufficient to directly use the calibrated preset calibration value as the preset calibration value used in the technical solution disclosed in the embodiment of fig. 1.
When a user drives on a road, a situation of traffic jam is often encountered, if the parking position of the user is exactly located on a slope, when the user starts on the slope, the requirement on a driven disc is high, and the slope value is larger, the requirement on the driven disc is higher, if the driven disc generates a larger abrasion loss, then when the vehicle starts on the slope, the vehicle is easily started to be difficult, and even if the driven disc is directly damaged when the vehicle starts, so that the vehicle is in a failure state, for this reason, in the technical solution disclosed in this embodiment, a solution for predicting whether the user can stop on a road with a front slope is further provided, referring to fig. 3, after determining that the actual ratio is larger than the calibrated ratio, the solution further includes:
step S301: acquiring a current road on which a vehicle runs based on an electronic map;
in the step, the current road on which the vehicle runs and the position information of the vehicle on the current road are determined based on an electronic map and a navigation system;
step S302: predicting a grade value of a road ahead;
in this step, it is determined whether a slope exists within a preset distance range in the vehicle driving direction based on the current road and the position information obtained in step S101, if a slope exists, a slope value of the slope is determined based on an altitude change value or other parameters of the slope, if the slope value is smaller, the requirement for the driven disk is lower when the road section is started, and therefore, the slope value can be ignored, if the slope value is larger, for example, it is larger than a preset value, step S303 is executed;
step S303: acquiring a slope starting calibration ratio corresponding to the slope value based on a second preset mapping table;
the slope value and a slope calibration ratio corresponding to the slope value are preset in the second preset mapping table, the slope calibration ratio is used for representing the current maximum abrasion loss of the driven disc when the driven disc is on a slope on roads with different slopes, and when the current abrasion loss of the driven disc is lower than the value when the driven disc is on the slope, danger exists when a user is on the slope;
step S304: judging whether the actual ratio is greater than the hill start calibration ratio or not, and executing a step S305 when the actual ratio is greater than the hill start calibration ratio;
step S305: and outputting prompt information for prompting the user to prohibit parking on the front slope.
In the technical solution disclosed in the embodiment of the present application, in order to ensure the reliability of the measured preset parameter, the preset parameter may be calculated by taking an average value of a plurality of preset parameters, and specifically, in the above method, the calculating to obtain the difference between the preset parameter and the preset calibration value may include:
recording preset parameters obtained based on clutch self-learning as current preset parameters;
acquiring historical data obtained by self-learning of the clutch;
acquiring N preset parameters which are positioned before the current preset parameter on a time axis from the historical data, wherein the N preset parameters are N preset parameters which are nearest to the acquisition time of the current preset parameter, and N is a positive integer not less than 1;
calculating the average value of the current preset parameter and the N preset parameters;
and calculating to obtain a difference value between the average value and the preset calibration value, and recording as an actual difference value.
Corresponding to the above method, the present application also discloses a device for detecting the wear extent of a clutch driven plate, and the specific operation content of each unit of the device is described below with reference to the content of the above method embodiment, and the device for detecting the wear extent of a clutch driven plate provided by the embodiment of the present application is described below, and the device for detecting the wear extent of a clutch driven plate described below and the method for detecting the wear extent of a clutch driven plate described above can be referred to correspondingly. Referring to fig. 4, the apparatus may include:
a parameter acquisition unit 100, corresponding to step S101 in the method, configured to acquire a preset parameter based on clutch self-learning, where the preset parameter is used to represent position information of a driven disc when the clutch cuts off or transmits power input by an engine to a transmission;
a difference value calculating unit 200, corresponding to steps S102-S103 in the method, configured to obtain a preset calibration value matching the preset parameter, calculate a difference value between the preset parameter and the preset calibration value, and record the difference value as an actual difference value;
the abrasion loss judging unit 300 corresponds to the steps S105 to S106 in the method, and is configured to calculate a ratio of the actual difference to a lever ratio of the clutch operating mechanism, record the ratio as an actual ratio, and judge whether the actual ratio is greater than a preset calibration ratio; and when the actual ratio is larger than the calibrated ratio, outputting prompt information for representing excessive loss of the driven disc.
When using the technical scheme disclosed in the above-mentioned embodiment of this application to detect clutch driven plate wearing and tearing volume, obtain clutch self-learning result according to setting for the frequency, by it predetermines the parameter to transfer in the result that the clutch self-learned, calculates predetermine the difference of parameter and predetermined calibration value, is calculating the ratio of difference and clutch operating mechanism lever ratio is judged ratio and the size of predetermineeing the calibration ratio, works as actual ratio is greater than during the calibration ratio, the prompt message that the output is used for the excessive loss of sign driven plate has realized that clutch driven plate wearing and tearing volume is excessive when, reminds the user to change the driven plate regularly, has reduced the maintenance cost of whole car.
Corresponding to the above method, the parameter collecting unit 100 is specifically configured to:
acquiring a sliding film point value, a minimum combination position or a maximum separation position based on clutch self-learning;
wherein the minimum combination position refers to the position of the clutch driven plate when the clutch driven plate, the clutch pressure plate and the clutch flying plate are completely contacted,
the maximum disengaged position refers to the clutch disk position when the clutch disk, clutch pressure plate, and clutch flyer are fully disengaged.
Corresponding to the method, the device further comprises:
a preset calibration value calibration unit corresponding to steps S201 to S204 in the above method for acquiring historical traveling road information of the vehicle; extracting the proportion of the slope road in the historical driving road; acquiring a calibration coefficient matched with the proportion of the slope road according to a first preset mapping table; and calibrating the preset calibration value according to the calibration coefficient.
Corresponding to the method, the device further comprises:
a prediction unit corresponding to steps S301 to S305 in the above method for acquiring a current road on which the vehicle is traveling based on the electronic map; judging whether a slope with a slope value larger than a preset value exists in the vehicle running direction and within a preset distance before the current position of the vehicle, and if so, acquiring the slope value of the slope; acquiring a slope starting calibration ratio corresponding to the slope value based on a second preset mapping table; judging whether the actual ratio is larger than the hill start calibration ratio or not; and when the actual ratio is larger than the hill start calibration ratio, outputting prompt information for prompting a user to prohibit parking on a front slope.
Corresponding to the method, when the difference between the preset parameter and the preset calibration value is obtained through calculation, the difference calculation unit is specifically configured to:
recording preset parameters obtained based on clutch self-learning as current preset parameters;
acquiring historical data obtained by self-learning of the clutch;
acquiring N preset parameters which are positioned before the current preset parameter on a time axis from the historical data, wherein N is a positive integer not less than 1;
calculating the average value of the current preset parameter and the N preset parameters;
and calculating to obtain a difference value between the average value and the preset calibration value, and recording as an actual difference value.
For convenience of description, the above system is described with the functions divided into various modules, which are described separately. Of course, the functionality of the various modules may be implemented in the same one or more software and/or hardware implementations as the present application.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for detecting the wear amount of a clutch driven disc is characterized by comprising the following steps:
acquiring preset parameters based on clutch self-learning, wherein the preset parameters are used for representing the position information of a driven disc when the clutch cuts off or transmits the power input from an engine to a transmission;
acquiring a preset calibration value matched with the preset parameter;
calculating to obtain a difference value between the preset parameter and a preset calibration value, and recording as an actual difference value;
calculating the ratio of the actual difference to the lever ratio of the clutch control mechanism, and recording the ratio as an actual ratio;
judging whether the actual ratio is larger than a preset calibration ratio or not;
and when the actual ratio is larger than the preset calibration ratio, outputting prompt information for representing excessive loss of the driven disc.
2. The method for detecting the wear amount of the clutch driven disc according to claim 1, wherein the preset parameter is a number value of a slip ring, a minimum engagement position or a maximum disengagement position based on self-learning of the clutch;
the minimum combination position refers to the position of the clutch driven plate when the clutch driven plate, the clutch pressure plate and the clutch flying plate are in complete contact;
the maximum disengaged position refers to the clutch disk position when the clutch disk, clutch pressure plate, and clutch flyer are fully disengaged.
3. The method for detecting the wear amount of the clutch driven disc according to claim 1, wherein before determining whether the actual ratio is greater than a preset calibration ratio, the method further comprises:
acquiring historical driving road information of a vehicle;
extracting the proportion of the slope road in the historical driving road;
acquiring a calibration coefficient matched with the proportion of the slope road according to a first preset mapping table;
and calibrating the preset calibration value according to the calibration coefficient.
4. The method for detecting the amount of wear of the clutch driven plate according to claim 1, further comprising, after determining that the actual ratio is greater than the preset calibration ratio:
acquiring a current road on which a vehicle runs based on an electronic map;
judging whether a slope with a slope value larger than a preset value exists in the vehicle running direction and within a preset distance before the current position of the vehicle, and if so, acquiring the slope value of the slope;
acquiring a slope starting calibration ratio corresponding to the slope value based on a second preset mapping table;
judging whether the actual ratio is larger than the hill start calibration ratio or not;
and when the actual ratio is larger than the hill start calibration ratio, outputting prompt information for prompting a user to prohibit parking on a front slope.
5. The method for detecting the amount of wear of the clutch disc according to claim 1, wherein the calculating a difference between the preset parameter and a preset calibration value includes:
recording preset parameters obtained based on clutch self-learning as current preset parameters;
acquiring historical data obtained by self-learning of the clutch;
acquiring N preset parameters which are positioned before the current preset parameter on a time axis from the historical data, wherein N is a positive integer not less than 1;
calculating the average value of the current preset parameter and the N preset parameters;
and calculating to obtain a difference value between the average value and the preset calibration value, and recording as an actual difference value.
6. A device for detecting an amount of wear of a clutch driven plate, comprising:
the parameter acquisition unit is used for acquiring preset parameters based on clutch self-learning, and the preset parameters are used for representing the position information of the driven disc when the clutch cuts off or transmits the power input from the engine to the transmission;
the difference value calculating unit is used for acquiring a preset calibration value matched with the preset parameter, calculating to obtain a difference value between the preset parameter and the preset calibration value, and recording the difference value as an actual difference value;
the abrasion loss judging unit is used for calculating the ratio of the actual difference value to the lever ratio of the clutch operating mechanism, recording the ratio as an actual ratio, and judging whether the actual ratio is larger than a preset calibration ratio or not; and when the actual ratio is larger than the preset calibration ratio, outputting prompt information for representing excessive loss of the driven disc.
7. The apparatus for detecting the amount of wear of a clutch disk according to claim 6, wherein the parameter acquisition unit is specifically configured to:
acquiring a sliding film point value, a minimum combination position or a maximum separation position based on clutch self-learning;
wherein the minimum combination position refers to the position of the clutch driven plate when the clutch driven plate, the clutch pressure plate and the clutch flying plate are completely contacted,
the maximum disengaged position refers to the clutch disk position when the clutch disk, clutch pressure plate, and clutch flyer are fully disengaged.
8. The apparatus for detecting an amount of wear of a clutch disc according to claim 6, further comprising:
the calibration unit of the preset calibration value is used for acquiring historical driving road information of the vehicle; extracting the proportion of the slope road in the historical driving road; acquiring a calibration coefficient matched with the proportion of the slope road according to a first preset mapping table; and calibrating the preset calibration value according to the calibration coefficient.
9. The apparatus for detecting an amount of wear of a clutch disc according to claim 6, further comprising:
a prediction unit for acquiring a current road on which the vehicle is traveling based on the electronic map; judging whether a slope with a slope value larger than a preset value exists in the vehicle running direction and within a preset distance before the current position of the vehicle, and if so, acquiring the slope value of the slope; acquiring a slope starting calibration ratio corresponding to the slope value based on a second preset mapping table; judging whether the actual ratio is larger than the hill start calibration ratio or not; and when the actual ratio is larger than the hill start calibration ratio, outputting prompt information for prompting a user to prohibit parking on a front slope.
10. The apparatus according to claim 6, wherein the difference calculation unit, when calculating the difference between the preset parameter and a preset calibration value, is specifically configured to:
recording preset parameters obtained based on clutch self-learning as current preset parameters;
acquiring historical data obtained by self-learning of the clutch;
acquiring N preset parameters which are positioned before the current preset parameter on a time axis from the historical data, wherein N is a positive integer not less than 1;
calculating the average value of the current preset parameter and the N preset parameters;
and calculating to obtain a difference value between the average value and the preset calibration value, and recording as an actual difference value.
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| CN201811534496.5A CN109572710B (en) | 2018-12-14 | 2018-12-14 | Method and device for detecting wear loss of clutch driven disc |
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