CN113700783A - Clutch disc state evaluation method and device and vehicle - Google Patents
Clutch disc state evaluation method and device and vehicle Download PDFInfo
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- CN113700783A CN113700783A CN202110978450.8A CN202110978450A CN113700783A CN 113700783 A CN113700783 A CN 113700783A CN 202110978450 A CN202110978450 A CN 202110978450A CN 113700783 A CN113700783 A CN 113700783A
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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
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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
- F16D66/026—Apparatus for indicating wear using electrical detection or indication means indicating different degrees of lining wear
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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
- F16D2066/008—Arrangements for monitoring working conditions, e.g. wear, temperature of clutches
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The application discloses a clutch plate state evaluation method and device and a vehicle. The method comprises the following steps: determining applicable information of a gearbox where a clutch plate is located, wherein the applicable information is used for representing the applicable degree of the internal environment of the gearbox to the working state of the clutch plate; determining wear information of the clutch plate, wherein the wear information is used for representing the wear condition of the clutch plate; and determining state information of the clutch plate according to the application information and the wear information. The scheme provided by the application can be used for more accurately evaluating the condition information of the clutch plate.
Description
Technical Field
The application relates to the technical field of clutches, in particular to a clutch plate state evaluation method and device and a vehicle.
Background
The clutch plates are relatively easily worn parts in the vehicle, and the clutch can transmit power through axial compression and release of the clutch plates. Once the clutch plates are excessively worn, the clutch can be ablated, the failure of the gearbox is caused, and great threat is brought to the running safety of the vehicle.
The current clutch plate state information prediction is mainly based on the driver's driving experience and clutch plate replacement experience. The clutch plate is worn to a certain degree by a driver to be replaced in time, and if the experience of the driver is insufficient or the subjective judgment is wrong, accidents such as anchor dropping and the like are easily caused in the driving process of the vehicle.
Disclosure of Invention
The present application is proposed to solve or improve the above-mentioned technical problems. The embodiment of the application provides a clutch plate state evaluation method, a clutch plate state evaluation device and a vehicle, and the clutch plate state information can be evaluated more accurately.
According to an aspect of the present application, there is provided a clutch plate state evaluation method including: determining applicable information of a gearbox where a clutch plate is located, wherein the applicable information is used for representing the applicable degree of the internal environment of the gearbox to the working state of the clutch plate; determining wear information of the clutch plate, wherein the wear information is used for representing the wear condition of the clutch plate; and determining state information of the clutch plate according to the application information and the wear information.
In one embodiment, the determining wear information of the clutch plate comprises: determining wear degree information of the clutch plate, wherein the wear degree information is used for representing the degree of wear of the clutch plate; and determining a coefficient of friction of the clutch plates, the coefficient of friction being indicative of the ability of the clutch plates to transmit power during operation.
In one embodiment, determining the applicable information for the gearbox in which the clutch plates are located comprises: detecting an internal oil temperature value of the gearbox and an internal pressure value of the gearbox according to a first detection period; determining first comparison information of the internal oil temperature value and a preset standard oil temperature value and second comparison information of the internal pressure value and a preset standard pressure value; and determining the applicable information according to the first comparison information and the second comparison information.
In an embodiment, the determining first comparison information of the internal oil temperature value and a preset standard oil temperature value, and the second comparison information of the internal pressure value and a preset standard pressure value includes: determining a first difference value between the internal oil temperature value and a preset standard oil temperature value and a second difference value between the internal pressure value and a preset standard pressure value in at least two continuous first detection periods; and determining a first magnitude relation between the first difference and a preset oil temperature standard deviation and a second magnitude relation between the second difference and a preset pressure standard deviation, wherein the first magnitude relation corresponds to the first comparison information, and the second magnitude relation corresponds to the second magnitude relation.
In one embodiment, the determining the wear level information of the clutch plate includes: acquiring the opening value of the clutch plate according to a preset acquisition period; when the gear of the gearbox is switched from a neutral gear to a non-neutral gear, determining a liquid filling time value when a liquid filling pressure value of an electromagnetic valve of the gearbox is increased from 0 to a maximum liquid filling pressure value; determining at least one opening degree representation value of the opening degree value and at least one liquid filling time representation value of the liquid filling time value which are acquired within a preset time period; and determining the wear degree information according to the opening degree characteristic value and the liquid filling time characteristic value.
In an embodiment, the determining the wear information according to the opening characteristic value and the filling time characteristic value comprises: and calculating the wear degree information through the initial opening value of the clutch plate, a preset liquid filling time standard time value, the difference between the n opening values and the opening characterization value in a preset time period, and the difference between the n liquid filling time values and the liquid filling time characterization value in the preset time period, wherein n is a positive integer greater than or equal to 1.
In one embodiment, determining the coefficient of friction of the clutch plates comprises: detecting an input rotating speed value of an input shaft and an output rotating speed value of an output shaft of the gearbox according to a second detection period, and calculating a rotating speed ratio according to the input rotating speed value and the output rotating speed value; determining a rotation speed ratio representation value of each third detection period according to at least one rotation speed ratio in each third detection period; and determining the friction coefficient according to the rotation speed ratio representation values of the third detection periods.
In an embodiment, the determining the friction coefficient according to the rotation speed ratio characterizing values of the plurality of third detection periods includes: and calculating the friction coefficient according to the difference between the m rotation speed ratio characterization values of the third detection period and the preset rotation speed ratio and a preset standard rotation speed ratio, wherein m is a positive integer greater than or equal to 1.
According to another aspect of the present application, there is provided a clutch plate state evaluation device including: the clutch disc working state determining unit is used for determining the working state of the clutch disc according to the working state of the clutch disc; the wear information determining unit is used for determining wear information of the clutch plate, and the wear information is used for representing the wear condition of the clutch plate; and the state determining unit is used for determining the state information of the clutch plate according to the application information and the wear information.
According to another aspect of the present application, there is provided a vehicle including: vehicle body and above-mentioned clutch plate state evaluation device.
According to the clutch plate state evaluation method, the clutch plate state evaluation device and the vehicle, the applicable information of the gearbox is determined by determining the applicable degree of the internal environment of the gearbox where the clutch plate is located to the working state of the clutch plate, and the internal operating environment of the gearbox is evaluated; and determining the state information of the clutch plate by combining the wear information of the clutch plate and the applicable information. In the scheme provided by each embodiment of the invention, the working environment of the clutch plate is considered when the state information of the clutch plate is determined, and the actual wear condition of the clutch plate is combined, so that the actual condition of the clutch plate is more accurately reflected, and the condition information of the clutch plate can be more accurately evaluated.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 is a schematic flowchart of a clutch plate state evaluation method according to an exemplary embodiment of the present application.
FIG. 2 is a schematic flow chart diagram of another clutch plate state evaluation method provided by an exemplary embodiment of the present application.
Fig. 3 is a flowchart illustrating a method for determining first comparison information and second comparison information according to an exemplary embodiment of the present application.
Fig. 4 is a flowchart illustrating a method for determining wear level information according to an exemplary embodiment of the present application.
FIG. 5 is a flow chart illustrating a method for determining a coefficient of friction according to an exemplary embodiment of the present application.
Fig. 6 is a schematic structural diagram of a clutch plate state information determination device according to an example of the present application.
FIG. 7 is a schematic illustration of one implementation provided in an exemplary embodiment of the application.
Fig. 8 is a schematic structural diagram of a vehicle according to an exemplary embodiment of the present disclosure.
Detailed Description
Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein.
As shown in fig. 1, an embodiment of the present invention provides a clutch plate state evaluation method, including the steps of:
step 110: and determining the applicable information of the gearbox where the clutch plate is located, wherein the applicable information is used for representing the applicable degree of the internal environment of the gearbox to the working state of the clutch plate.
Specifically, since the operating environment of the clutch plate is inside the transmission, the internal environment of the transmission may also affect the clutch plate, and the internal environment of the transmission may be affected by various factors, which may positively or negatively affect the state information of the clutch plate, so that when determining the state information of the clutch plate, it is necessary to evaluate the operating environment of the transmission on which the clutch plate is mounted, determine the applicable information of the transmission relative to the clutch plate, and determine whether the internal environment of the transmission is suitable for the clutch plate to operate.
Step 120: wear information of the clutch plates is determined, and the wear information is used for representing the wear condition of the clutch plates.
Generally, the wear of the clutch plates is usually estimated by the driving experience of the driver, and the driver usually determines the wear according to the driving experience and the amount of the driving mileage of the vehicle, but the wear of the clutch plates cannot be estimated by the driving experience and the driving mileage of the vehicle because the materials of the clutch plates used by different vehicles are different according to the driving habits of the driver, so the wear of the clutch plates cannot be estimated by the method, and quantitative evaluation needs to be performed according to the wear to determine how the wear of the clutch plates is actually.
It should be noted that, in the practical application process, the calculation may be synchronized to determine the applicable information of the clutch plate and the wear information of the clutch plate.
Step 130: and determining the state information of the clutch plate according to the application information and the wear information.
Specifically, after obtaining the applicable information and the wear information, the state information of the clutch plate is calculated by the two. By calculating the applicable information and the wear information, the overall operation environment of a gearbox where the clutch plate is located is considered, the worn degree of the clutch plate is quantized, and meanwhile the trend of future wear is combined, so that the state information of the clutch plate can be more accurately evaluated, and the service life of the clutch plate can be predicted; in addition, this mode does not affect the evaluation of the state information due to the difference in the operation of the driver, and as a result, the state information of the clutch plates can be evaluated more objectively without being affected by different drivers.
In addition, the application information and the wear information of the clutch plates are determined for synchronization in the implementation flow, and the determination sequence of the application information and the wear information is not limited in step 110 and step 120.
In an embodiment of the present invention, step 120 may include the following steps: determining wear degree information of the clutch plate, wherein the wear degree information is used for representing the worn degree of the clutch plate; and determining a friction coefficient of the clutch plates, the friction coefficient being indicative of the ability of the clutch plates to transmit power during operation.
Specifically, the friction coefficient and the wear degree information are parameters for directly evaluating the wear state of the clutch plates. The friction coefficient indicates the degree of friction to which the clutch plates are subjected, unlike the degree of wear to which the clutch plates have been worn indicated by the wear degree information. The friction coefficient and the wear degree information are combined, and the loss of the clutch plate can be quantized visually.
As shown in fig. 2, in an embodiment of the present invention, step 110 may include the following steps:
step 111: and detecting the internal oil temperature value of the gearbox and the internal pressure value of the gearbox according to the first detection period.
Specifically, a gear oil temperature sensor and a gear oil pressure sensor are pre-configured in the gearbox, the gear oil temperature sensor collects an internal oil temperature value of the gearbox, the gear oil pressure sensor is used for an internal pressure value of the gearbox, and the gear oil temperature sensor and the gear oil pressure sensor are important parameters reflecting an internal environment of the gearbox.
Step 112: and determining first comparison information of the internal oil temperature value and a preset standard oil temperature value and second comparison information of the internal pressure value and a preset standard pressure value.
Specifically, a standard oil temperature value and a standard pressure value of the gearbox suitable for the clutch plate to work are set, first comparison information of the internal oil temperature value and the standard oil temperature value and second comparison information of the internal pressure value and the standard pressure value are calculated according to a first detection period, the standard oil temperature value and the standard pressure value represent the oil temperature value and the pressure value in the gearbox when the clutch plate is in a better working state, and therefore the difference between the current working environment in the gearbox and the environment suitable for the clutch plate to work can be reflected through the first comparison information and the second comparison information.
Step 113: and determining applicable information according to the first comparison information and the second comparison information.
Specifically, as mentioned above, the first comparison information and the second comparison information can reflect the difference between the current working environment in the transmission and the environment suitable for the clutch plate to work, so that the working environment in the transmission can be visually evaluated according to the first comparison information and the second comparison information to determine whether the working environment in the transmission is suitable for the clutch plate to work.
As shown in fig. 3, in an embodiment of the present invention, step 112 may include:
step 310: and determining a first difference value between the internal oil temperature value and a preset standard oil temperature value and a second difference value between the internal pressure value and a preset standard pressure value in at least two continuous first detection periods.
Specifically, as described above, a gear oil temperature sensor and a gear oil pressure sensor are provided in the transmission, and a standard oil temperature value and a standard pressure value are set. In a plurality of continuous first detection periods, calculating a first difference value between the gear oil temperature sensor and a standard oil temperature value, and calculating a second difference value between a detection result of the gear oil pressure sensor and a standard pressure value.
Step 320: and determining a first magnitude relation between the first difference and a preset oil temperature standard deviation and a second magnitude relation between the second difference and a preset pressure standard deviation.
Specifically, an oil temperature standard deviation between an internal oil temperature value and a standard oil temperature value and a pressure standard deviation between an internal pressure value and a standard pressure value are preset, and the oil temperature standard deviation and the pressure standard deviation represent the range of difference between the current environment in the gearbox and an ideal working environment. The first magnitude relation and the second magnitude relation can be determined by comparing the oil temperature standard deviation and the pressure standard deviation with the first difference value and the second difference value, respectively. The first magnitude relation and the second magnitude relation are respectively used as part of the first comparison information and the second comparison information and used for representing whether the difference between the internal oil temperature and pressure of the transmission and the standard value is within an acceptable range or not.
In an embodiment of the present invention, determining the applicable information according to the first comparison information and the second comparison information includes: and determining applicable information according to the first size relation and the second size relation.
Specifically, when the first comparison information and the second comparison information include the first magnitude relation and the second magnitude relation, respectively, for example, the oil temperature standard deviation and the pressure standard deviation are represented by σ T and σ P, respectively, and the oil temperature standard deviation and the pressure standard deviation are represented by σ 1 and σ 2, respectively. In a plurality of continuous first detection periods, if the first size relations are sigma T < sigma 1 and the second size relations are sigma P < sigma 2, the application information of the gearbox relative to the clutch plate is considered to be good, and the application information is 100, and conversely, in a plurality of continuous first detection periods, if the first size relations are sigma T ≧ sigma 1 and the second size relations are sigma P ≧ sigma 2, the application information is poor, and the application information is 0. The corresponding relation between the applicable information and the expected value of the oil temperature and the standard deviation of the pressure of the gear oil can be adjusted according to factors such as actual test conditions, actual working conditions of the gearbox and the like.
As shown in fig. 4, in an embodiment of the present invention, determining the wear level information of the clutch plate may include the steps of:
step 410: and acquiring the opening value of the clutch disc according to a preset acquisition period.
Specifically, still dispose clutch disc displacement sensor in the gearbox, according to the collection cycle that predetermines, gather the opening value of clutch disc through clutch disc displacement sensor.
Step 420: and determining a liquid filling time value when the liquid filling pressure value of the electromagnetic valve of the gearbox is increased from 0 to the maximum liquid filling pressure value every time the gear of the gearbox is switched from neutral to non-neutral.
Specifically, a gear shifter is arranged in the gearbox, and when the driving gear is switched from neutral to non-neutral by judging a gear signal input by the gear shifter, a liquid filling time value of the electromagnetic valve is acquired, wherein the liquid filling pressure value of the electromagnetic valve is increased from 0 to the maximum value in the gear shifting process.
Step 430: and determining at least one opening degree representation value of the opening degree value and at least one liquid filling time representation value of the liquid filling time value which are acquired in a preset time period.
The preset time period can comprise a plurality of acquisition cycles, so that a plurality of opening degree characterization values can be obtained. Specifically, in a preset time period, an opening degree characteristic value of the clutch plate in the current period and a liquid filling time characteristic value of a liquid filling time value of the electromagnetic valve liquid filling pressure value which is increased from 0 to the maximum value in the current period are calculated, and the opening degree characteristic value and the liquid filling time characteristic value can reflect the working condition of the clutch plate in a certain time. The opening degree indicator and the filling time indicator may be obtained by averaging, for example, five opening degrees and 5 filling times are obtained within a preset time period, and the opening degree indicator and the filling time indicator may be obtained by averaging the 5 opening degrees and the 5 filling times, respectively.
Step 440: and determining the wear degree information according to the opening characteristic value and the liquid filling time characteristic value.
Specifically, the opening degree characteristic value and the liquid filling time characteristic value can reflect the working condition of the clutch plate within a certain time, so that the two parameters can be influenced by the wear condition of the clutch plate, and therefore, the wear degree information of the clutch plate can be obtained through the opening degree characteristic value and the liquid filling time characteristic value.
In an embodiment of the present invention, step 440 may include: and calculating the wear degree information through the initial opening value of the clutch plate, a preset liquid filling time standard value, the difference between the n opening values in the preset time period and the opening characterization value, and the difference between the n liquid filling time values in the preset time period and the liquid filling time characterization value, wherein n is a positive integer greater than or equal to 1.
Specifically, the above-mentioned parameter may calculate the wear level information by the following first formula, the first formula including:
ms is wear information, Ao is a preset initial opening value of the clutch plate, To is a preset liquid filling time standard value, To may be a standard time value when a liquid filling pressure value of the solenoid valve rises from 0 To a maximum liquid filling pressure value, a1, a2,. ann represents a difference between n opening values and An opening characteristic value in a preset time period, and T1, T2,. Tn represents a difference between n liquid filling time values and a liquid filling time characteristic value in a preset time period.
The initial opening value of the clutch plate displacement sensor and the maximum liquid filling pressure preset by the gear shifting solenoid valve can be collected and stored in advance. Generally, the larger the opening degree of the clutch plate, the longer the solenoid valve filling time, and the larger the degree of friction of the clutch plate. The method comprises the following steps that a plurality of acquisition cycles can be included in a preset time period, in each acquisition cycle, the opening degree of a clutch plate is acquired through a clutch plate displacement sensor, and an opening degree representation value of the clutch plate in the current cycle is calculated; meanwhile, a gear signal input by the gear judging device is received, when the driving gear is switched from a neutral gear to a non-neutral gear, the time when the liquid filling pressure value of the electromagnetic valve rises from 0 to the maximum liquid filling pressure value in each gear shifting process is collected, and the average liquid filling time of the electromagnetic valve in the current period is calculated. Further, the difference between the opening degree characteristic value and the initial opening degree value and the difference between the liquid filling time characteristic value and the standard time value in n continuous periods are calculated, and the change of the two parameters and the preset value can reflect the condition of the clutch plate receiving the wear, so the wear degree information of the clutch plate can be calculated through the first formula.
In an embodiment of the present invention, as shown in fig. 5, determining the coefficient of friction of the clutch plates may include:
step 510: and detecting the input rotating speed value of the input shaft of the gearbox and the output rotating speed value of the output shaft according to the second detection period, and calculating a rotating speed ratio according to the input rotating speed value and the output rotating speed value.
Specifically, a gearbox input shaft rotating speed sensor and a gearbox output shaft rotating speed sensor are further arranged in the gearbox, the gearbox input shaft rotating speed sensor and the gearbox output shaft rotating speed sensor can process pulse signals through pulse signals of the gearbox input shaft and the gearbox output shaft and convert the pulse signals into rotating speeds to obtain an input rotating speed value and an output rotating speed value, and a rotating speed ratio is obtained according to the ratio of the input rotating speed value to the output rotating speed value. The magnitude of the rotation speed ratio can reflect the power transmission, and the power transmission has a direct relationship with the state of the clutch plates.
Step 520: and determining a rotation speed ratio representation value of the third detection period according to at least one rotation speed ratio in each third detection period.
Specifically, a plurality of rotation speed ratios obtained through the steps in the third detection period are determined, and rotation speed ratio characterization values of the rotation speed ratios are determined. The rotation speed ratio representation value can reflect the transmission condition of the power in each detection period in the second detection period. For example, the speed ratio characterization value may be implemented by averaging, for example, 6 speed ratios are obtained in a certain detection period, and the speed ratio characterization value may be an average value of the 6 speed ratios.
Step 530: and determining the friction coefficient according to the rotation speed ratio representation values of the third detection periods.
Specifically, since at least one rotation speed ratio representative value is obtained in each of the third detection periods, the at least one rotation speed ratio representative value can reflect the power transmission condition of the transmission in the third detection period. As described above, since the power transmission condition of the transmission is directly related to the condition of the clutch plates, the friction coefficient of the clutch plates can be determined from the rotation speed ratio representative value over a certain period of time.
In an embodiment of the present invention, determining the friction coefficient according to the rotation speed ratio representative values of the plurality of third detection periods may include: and calculating the friction coefficient according to the difference between the m rotation speed ratio characterization values of the third detection period and the preset rotation speed ratio and a preset standard rotation speed ratio, wherein m is a positive integer greater than or equal to 1.
Specifically, the above parameters may be calculated by a second formula including:
mc is the friction coefficient, F1, F2,. Fn respectively represent the difference between the m characteristic values of the rotating speed ratio in the third detection period and the preset rotating speed ratio, and Fo is the preset standard rotating speed ratio.
And evaluating the friction coefficient of the clutch plate according to the dynamic change condition of the rotating speed ratio between the input shaft and the output shaft. After the input rotating speed value and the output rotating speed value are obtained, the rotating speed ratio of the input rotating speed value and the output rotating speed value is calculated in real time, the representing value of the rotating speed ratio in each period is calculated, the representing value of the rotating speed ratio is compared with the preset rotating speed ratio to calculate the difference value, and then the friction coefficient of the clutch plate is calculated through a second formula.
It should be noted that n and m in the first formula and the second formula may be the same.
In addition, after calculating the applicability information and the wear information including the wear degree information and the friction coefficient, the three evaluation parameters may be weighted according to experience, for example, the applicability parameter is weighted α, the wear degree information parameter is weighted β, and the friction coefficient is weighted γ, and the clutch plate state information may be calculated by the following third formula:
H＝αS1+βS2+γS3
in one possible embodiment, α > β, α > γ, α + β + γ ═ 1.
The state of the clutch plate can be judged according to the calculated clutch plate state information value.
For example, the clutch plate states are divided into 4 types according to the state information values, the clutch plate is judged to be in a good state within the range of 90-100 state information, the clutch plate is judged to be in a good state within the range of 70-90 state information, the clutch plate is judged to be in a good state within the range of 60-70 state information, and the clutch plate is judged to be in a damaged state below the state information 60. The state information value and the state of the clutch plate are visually displayed through a display module on the vehicle, and when the clutch plate is in a damaged state, relevant early warning information is displayed to prompt a driver to check the condition of the clutch plate in time for maintenance or replacement.
As shown in fig. 6, an embodiment of the present invention provides a clutch plate state information determination apparatus, including:
the application information determining unit 610 is configured to determine application information of a transmission in which the clutch plate is located, where the application information is used to represent an application degree of an internal environment of the transmission to an operating state of the clutch plate.
And a wear information determining unit 620 for determining wear information of the clutch plates, wherein the wear information is used for representing the wear condition of the clutch plates.
And a state determining unit 630, configured to determine state information of the clutch plates according to the applicable information and the wear information.
In an embodiment of the present invention, the wear information determining unit 620 is configured to perform: determining wear degree information of the clutch plate, wherein the wear degree information is used for representing the worn degree of the clutch plate; a friction coefficient of the clutch plates is determined, and the friction coefficient is used for representing the capacity of the clutch plates for transmitting power during operation.
In an embodiment of the present invention, the applicable information determining unit 610 is configured to perform: detecting an internal oil temperature value of the gearbox and an internal pressure value of the gearbox according to a first detection period; determining first comparison information of the internal oil temperature value and a preset standard oil temperature value and second comparison information of the internal pressure value and a preset standard pressure value; and determining applicable information according to the first comparison information and the second comparison information.
In an embodiment of the present invention, when the applicable information determining unit 610 executes the first comparison information for determining the internal oil temperature value and the preset standard oil temperature value, and the second comparison information for determining the internal pressure value and the preset standard pressure value, it specifically executes: determining a first difference value between the internal oil temperature value and a preset standard oil temperature value and a second difference value between the internal pressure value and a preset standard pressure value in at least two continuous first detection periods; and determining a first magnitude relation between the first difference and a preset oil temperature standard deviation and a second magnitude relation between the second difference and a preset pressure standard deviation.
In an embodiment of the present invention, when determining the applicable information according to the first comparison information and the second comparison information, the applicable information determining unit 610 performs: and determining applicable information according to the first size relation and the second size relation.
In an embodiment of the present invention, the wear information determining unit 620, when performing the determination of the wear degree information of the clutch plates, performs: acquiring the opening value of the clutch plate according to a preset acquisition period; when the gear of the gearbox is switched from neutral to non-neutral, determining a liquid filling time value when the liquid filling pressure value of an electromagnetic valve of the gearbox is increased from 0 to the maximum liquid filling pressure value; determining an opening degree representation value of at least one opening degree value and a liquid filling time representation value of at least one liquid filling time value which are acquired within a preset time period; and determining the wear degree information according to the opening characteristic value and the liquid filling time characteristic value.
In an embodiment of the present invention, when determining the wear information according to the opening characteristic value and the filling time characteristic value, the wear information determining unit 620 performs:
the wear level information is calculated by a first formula including:
ms is wear degree information, Ao is a preset initial opening value of the clutch plate, To is a standard time value when a preset solenoid valve liquid filling pressure value rises from 0 To a maximum liquid filling pressure value, a1, a2, and.. An represent the difference between n opening values and An opening degree representation value in a preset time period, and T1, T2, and.. Tn represent the difference between n liquid filling time values and a liquid filling time representation value in a preset time period.
In an embodiment of the present invention, the wear information determining unit 620 performs, when performing the determination of the friction coefficient of the clutch plate: detecting an input rotating speed value of an input shaft and an output rotating speed value of an output shaft of the gearbox according to the second detection period, and calculating a rotating speed ratio according to the input rotating speed value and the output rotating speed value; determining a rotation speed ratio representation value of the third detection period according to at least one rotation speed ratio in each third detection period; and determining the friction coefficient according to the rotation speed ratio representation values of the third detection periods.
In an embodiment of the present invention, the wear information determination unit 620 performs, when performing the determination of the friction coefficient according to the rotation speed ratio representative values of the plurality of third detection periods: calculating the friction coefficient by a second formula comprising:
mc is a friction coefficient, F1, F2,. Fn respectively represent the difference between the n characteristic values of the rotating speed ratio in the third detection period and the preset rotating speed ratio, and Fo is a preset standard rotating speed ratio.
It should be noted that the first detection period, the second detection period, the third detection period, and the preset acquisition period may be detection periods with the same duration.
As shown in fig. 7, fig. 7 provides a schematic diagram of an embodiment of the present invention, in which a transmission is configured with a gear oil temperature sensor, a gear oil pressure sensor, a clutch displacement sensor, a solenoid valve liquid-filled road roller sensor, a transmission input shaft rotation speed sensor and a transmission output shaft rotation speed sensor, and a driving device is configured with a gear shifter to output a gear signal, and is configured with a control module and a display module. The gear oil temperature sensor is used for collecting oil temperature inside the gearbox, the gear oil pressure sensor is used for collecting pressure inside the gearbox, the clutch displacement sensor is used for collecting opening of a clutch disc, the solenoid valve liquid filling pressure sensor is used for collecting liquid filling pressure of a gear shifting solenoid valve, and the gearbox input shaft rotating speed sensor and the gearbox output shaft rotating speed sensor are respectively used for collecting pulse signals of an input shaft and an output shaft of the gearbox. The clutch plate state information determining means may be a control module in the vehicle. The control module can be arranged in a cab control box and is a processing and operation analysis core, the control module can receive input signals of all sensors to perform analysis processing, the clutch plate health prediction model algorithm is used for calculating the application information of the gearbox relative to the clutch plate, the friction coefficient and the wear degree information of the clutch plate, the clutch plate state information is obtained through calculation of the three parameters, all calculated data are stored in the control module, and when the clutch plate state information is lower than a preset value, early warning prompt is performed. The display module is used for displaying early warning information and clutch plate state information. Further, it is possible to collect the transmission output torque by using a torque sensor, and calculate the friction coefficient of the clutch plates from the difference between the output torque and the theoretical torque.
As shown in fig. 8, an embodiment of the present invention provides a vehicle 80, which includes a vehicle body 810 and a clutch plate state information determination device 820 described in any of the above embodiments.
Specifically, the vehicle body is used for the functions of normal running, loading and the like of the vehicle; the clutch plate state information determining device may be installed in a cab console box of a vehicle body, and is configured to execute the clutch plate state information determining method according to any of the above embodiments, that is, the internal environment of a transmission where the clutch plate of the vehicle body is located is collected by various sensors to obtain applicable information and determine wear information of the clutch plate, and the clutch plate state information determining device may prompt a driver to perform relevant operations according to the determined clutch plate state information, for example, determine whether the clutch plate needs to be replaced according to the clutch plate state information.
The foregoing describes the general principles of the present application in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present application are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the foregoing disclosure is not intended to be exhaustive or to limit the disclosure to the precise details disclosed.
The block diagrams of devices, apparatuses, systems referred to in this application are only given as illustrative examples and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
It should also be noted that in the devices, apparatuses, and methods of the present application, the components or steps may be decomposed and/or recombined. These decompositions and/or recombinations are to be considered as equivalents of the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.
Claims (10)
1. A clutch plate state evaluation method, characterized by comprising:
determining applicable information of a gearbox where a clutch plate is located, wherein the applicable information is used for representing the applicable degree of the internal environment of the gearbox to the working state of the clutch plate;
determining wear information of the clutch plate, wherein the wear information is used for representing the wear condition of the clutch plate; and
and determining the state information of the clutch plate according to the application information and the wear information.
2. A clutch plate state evaluation method according to claim 1, wherein the determining wear information of the clutch plate includes:
determining wear degree information of the clutch plate, wherein the wear degree information is used for representing the degree of wear of the clutch plate; and
determining a coefficient of friction of the clutch plates, the coefficient of friction being indicative of the ability of the clutch plates to transmit power during operation.
3. A clutch plate condition assessment method according to claim 1, wherein determining applicable information for the gearbox in which the clutch plate is located comprises:
detecting an internal oil temperature value of the gearbox and an internal pressure value of the gearbox according to a first detection period;
determining first comparison information of the internal oil temperature value and a preset standard oil temperature value and second comparison information of the internal pressure value and a preset standard pressure value; and
and determining the applicable information according to the first comparison information and the second comparison information.
4. A clutch plate state evaluation method according to claim 3, wherein the determining of the first comparison information of the internal oil temperature value and a preset standard oil temperature value and the second comparison information of the internal pressure value and a preset standard pressure value includes:
determining a first difference value between the internal oil temperature value and a preset standard oil temperature value and a second difference value between the internal pressure value and a preset standard pressure value in at least two continuous first detection periods;
and determining a first magnitude relation between the first difference and a preset oil temperature standard deviation and a second magnitude relation between the second difference and a preset pressure standard deviation, wherein the first magnitude relation corresponds to the first comparison information, and the second magnitude relation corresponds to the second magnitude relation.
5. A clutch plate state evaluation method according to claim 2, wherein the determining the wear degree information of the clutch plate includes:
acquiring the opening value of the clutch plate according to a preset acquisition period;
when the gear of the gearbox is switched from a neutral gear to a non-neutral gear, determining a liquid filling time value when a liquid filling pressure value of an electromagnetic valve of the gearbox is increased from 0 to a maximum liquid filling pressure value;
determining at least one opening degree representation value of the opening degree value and at least one liquid filling time representation value of the liquid filling time value which are acquired in a preset time period; and
and determining the wear degree information according to the opening characteristic value and the liquid filling time characteristic value.
6. A clutch plate state evaluation method according to claim 5,
the determining the wear level information according to the opening degree characterization value and the filling time characterization value comprises:
and calculating the wear degree information through the initial opening value of the clutch plate, a preset liquid filling time standard value, the difference between the n opening values and the opening characterization value in a preset time period, and the difference between the n liquid filling time values and the liquid filling time characterization value in the preset time period, wherein n is a positive integer greater than or equal to 1.
7. A clutch plate state evaluation method according to claim 2, wherein determining the friction coefficient of the clutch plate includes:
detecting an input rotating speed value of an input shaft and an output rotating speed value of an output shaft of the gearbox according to a second detection period, and calculating a rotating speed ratio according to the input rotating speed value and the output rotating speed value;
determining a rotation speed ratio representation value of each third detection period according to at least one rotation speed ratio in each third detection period;
and determining the friction coefficient according to the rotation speed ratio representation values of the third detection periods.
8. A clutch plate state evaluation method according to claim 7,
the determining the friction coefficient according to the rotation speed ratio characterizing value of the plurality of third detection periods includes:
and calculating the friction coefficient according to the difference between the m rotation speed ratio characterization values of the third detection period and the preset rotation speed ratio and a preset standard rotation speed ratio, wherein m is a positive integer greater than or equal to 1.
9. A clutch plate state evaluation device, characterized by comprising:
the clutch disc working state determining unit is used for determining the working state of the clutch disc according to the working state of the clutch disc;
the wear information determining unit is used for determining wear information of the clutch plate, and the wear information is used for representing the wear condition of the clutch plate;
and the state determining unit is used for determining the state information of the clutch plate according to the application information and the wear information.
10. A vehicle, characterized by comprising: a vehicle body, and the clutch plate state evaluation device of claim 9.
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