CN115451120B - Method, device, equipment and storage medium for correcting clutch characteristic curve - Google Patents
Method, device, equipment and storage medium for correcting clutch characteristic curve Download PDFInfo
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
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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
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
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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
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
- F16H59/56—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on signals from the main clutch
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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
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H2059/147—Transmission input torque, e.g. measured or estimated engine torque
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H2061/0075—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by a particular control method
- F16H2061/0087—Adaptive control, e.g. the control parameters adapted by learning
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Abstract
The invention belongs to the technical field of clutches, and discloses a method, a device, equipment and a storage medium for correcting a characteristic curve of a clutch. According to the method, the high torque section curve in the clutch characteristic curve is obtained, then the torque deviation percentage corresponding to the high torque section curve is obtained, and when the torque deviation percentage is larger than a preset threshold value, the high torque section curve is corrected according to the deviation torque point in the high torque section curve. According to the invention, the torque deviation percentage corresponding to the high-torque section curve is obtained, when the torque deviation percentage is larger than the preset threshold value, the clutch characteristic curve of the high-torque section is required to be corrected, and the high-torque section curve is corrected according to the deviation torque point in the high-torque section curve, so that the clutch characteristic curve of the high-torque section can be accurately corrected, the clutch characteristic curve of the high-torque section is more attached to an engine-gearbox power system, and the drivability and fuel economy of a vehicle are improved.
Description
Technical Field
The present invention relates to the field of clutch technologies, and in particular, to a method, an apparatus, a device, and a storage medium for correcting a characteristic curve of a clutch.
Background
For a vehicle with a clutch transmission system, after the vehicle is taken off line from a production line and is handed in a customer, the characteristics of the clutch system can change along with the continuous increase of driving mileage, and the clutch characteristic curve can change greatly in the first twenty-thousand kilometers as a whole; after that, the clutch characteristic curve is stable about eighty kilometers; the clutch characteristic curve then changes considerably. If the change of the clutch characteristic curve cannot be recognized in time and is subjected to self-adaptive correction, the drivability and the fuel economy of the vehicle are affected. Therefore, how to accurately correct the clutch characteristic curve of the high torque section becomes a problem to be solved.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a storage medium for correcting a clutch characteristic curve, which aim to solve the technical problem of accurately correcting the clutch characteristic curve of a high torque section.
In order to achieve the above object, the present invention provides a method for correcting a clutch characteristic, the method for correcting a clutch characteristic comprising the steps of:
acquiring a high torque section curve in a clutch characteristic curve;
acquiring a torque deviation percentage corresponding to the high torque section curve;
and when the torque deviation percentage is larger than a preset threshold value, correcting the high-torque section curve according to the deviation torque point in the high-torque section curve.
Optionally, the step of obtaining the torque deviation percentage corresponding to the high torque section curve specifically includes:
acquiring the corresponding engine torque of the vehicle to be treated;
determining a nominal clutch torque according to the high torque segment curve;
determining a torque offset from the engine torque and the nominal clutch torque;
and determining a torque deviation percentage corresponding to the high torque section curve according to the torque deviation and the nominal clutch torque.
Optionally, when the torque deviation percentage is greater than a preset threshold, the step of correcting the high torque section curve according to the deviation torque point in the high torque section curve specifically includes:
when the torque deviation percentage is larger than a preset threshold value, determining a deviation torque point in the high torque section curve according to the torque deviation;
acquiring a deviation torque point index value of the torque deviation point in the high-torque section curve;
and correcting the high-torque section curve according to the deviation torque point index value.
Optionally, the step of obtaining the deviation torque point index value of the torque deviation point in the high torque section curve specifically includes:
obtaining target torque of the torque deviation point in the high-torque section curve;
acquiring a reference torque set corresponding to each reference point in the high torque section curve;
and comparing the target torque with each reference torque in the reference torque set, and determining a deviation torque point index value of the torque deviation point in the high-torque section curve according to a comparison result.
Optionally, the step of correcting the high torque segment curve according to the deviation torque point index value specifically includes:
determining a correction point index value of the high torque section curve according to the deviation torque point index value;
acquiring a correction value corresponding to the correction point index value;
and correcting the high torque section curve according to the correction value.
Optionally, the step of obtaining the correction value corresponding to the correction point index value specifically includes:
acquiring an original value corresponding to the index value of the correction point from the high-torque section curve;
determining a torque compensation value according to the torque deviation;
and determining a correction value corresponding to the correction point index value according to the torque deviation, the original value, the deviation torque point index value and the torque compensation value.
Optionally, the step of determining the correction value corresponding to the correction point index value according to the torque deviation, the original value, the deviation torque point index value, and the torque compensation value specifically includes:
determining a correction value corresponding to the correction point index value according to the torque deviation, the original value, the deviation torque point index value and the torque compensation value through a preset formula, wherein the preset formula is as follows:
T NewPoint(N+K) ＝T OldPoint(N+K) +T Error *Fator+K*T offset
wherein T is NewPoint(N+K) Indicating the correction value corresponding to the correction point index value, n+K indicating the correction point index value, T oldPoint(N+K) Representing the original value corresponding to the index value of the correction point, T Error Indicating torque deviation, and Fator indicating correction factor, T offset Representing the torque compensation value.
In addition, in order to achieve the above object, the present invention also provides a device for correcting a clutch characteristic, the device for correcting a clutch characteristic including:
the curve acquisition module is used for acquiring a high torque section curve in the clutch characteristic curve;
the deviation acquisition module is used for acquiring the torque deviation percentage corresponding to the high torque section curve;
and the curve correction module is used for correcting the high-torque section curve according to the deviation torque point in the high-torque section curve when the torque deviation percentage is larger than a preset threshold value.
In addition, in order to achieve the above object, the present invention also proposes a correction apparatus of a clutch characteristic, the correction apparatus of a clutch characteristic including: the system comprises a memory, a processor and a correction program for the clutch characteristic curve stored on the memory and capable of running on the processor, wherein the correction program for the clutch characteristic curve is configured to realize the steps of the correction method for the clutch characteristic curve.
In order to achieve the above object, the present invention also proposes a storage medium having stored thereon a correction program of a clutch characteristic curve, which when executed by a processor, implements the steps of the method for correcting a clutch characteristic curve as described above.
According to the method, the high torque section curve in the clutch characteristic curve is obtained, then the torque deviation percentage corresponding to the high torque section curve is obtained, and when the torque deviation percentage is larger than a preset threshold value, the high torque section curve is corrected according to the deviation torque point in the high torque section curve. According to the invention, the torque deviation percentage corresponding to the high-torque section curve is obtained, when the torque deviation percentage is larger than the preset threshold value, the clutch characteristic curve of the high-torque section is required to be corrected, and the high-torque section curve is corrected according to the deviation torque point in the high-torque section curve, so that the clutch characteristic curve of the high-torque section can be accurately corrected, the clutch characteristic curve of the high-torque section is more attached to an engine-gearbox power system, and the drivability and fuel economy of a vehicle are improved.
Drawings
FIG. 1 is a schematic diagram of a device for modifying a clutch characteristic curve of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart of a first embodiment of a method for modifying a clutch characteristic curve according to the present invention;
FIG. 3 is a schematic diagram of a clutch characteristic curve according to an embodiment of a method for correcting a clutch characteristic curve of the present invention;
FIG. 4 is a flowchart of a second embodiment of a method for modifying a clutch characteristic of the present invention;
FIG. 5 is a flowchart of a third embodiment of a method for modifying a clutch characteristic curve according to the present invention;
FIG. 6 is a schematic diagram of a modified high torque section curve according to an embodiment of a method for modifying a clutch characteristic of the present invention;
fig. 7 is a block diagram showing the configuration of a first embodiment of the clutch characteristic curve correction device according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a device for correcting a clutch characteristic curve of a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the correction device of the clutch characteristic may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the configuration shown in FIG. 1 does not constitute a limitation of the correction device for the clutch characteristic, and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a correction program for a clutch characteristic curve.
In the clutch characteristic curve correction apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the device for correcting a clutch characteristic curve according to the present invention may be disposed in the device for correcting a clutch characteristic curve, where the device for correcting a clutch characteristic curve invokes a correction program for a clutch characteristic curve stored in the memory 1005 through the processor 1001, and executes a correction method for a clutch characteristic curve according to the embodiment of the present invention.
Based on the above-mentioned device for correcting the characteristic curve of the clutch, an embodiment of the present invention provides a method for correcting the characteristic curve of the clutch, and referring to fig. 2, fig. 2 is a flowchart of a first embodiment of the method for correcting the characteristic curve of the clutch according to the present invention.
In this embodiment, the method for correcting the clutch characteristic curve includes the following steps:
step S10: acquiring a high torque section curve in a clutch characteristic curve;
it should be noted that, the execution body of the present embodiment may be a computing service device with data processing and network communication, such as a microprocessor, a central processing unit, or the like, or an electronic device or a correction device of a clutch characteristic curve capable of implementing the above functions. The present embodiment and the following embodiments will be described below with reference to the clutch characteristic curve correction device.
It is understood that the clutch characteristic curve may be fitted by a plurality of reference points, and in particular, reference may be made to fig. 3, and fig. 3 is a schematic diagram of a clutch characteristic curve according to an embodiment of the method for correcting a clutch characteristic curve of the present invention. As shown in fig. 3, the clutch characteristic curve in fig. 3 is fitted by a plurality of Reference points (Reference points), and the abscissa u may be pressure or position, and the ordinate T is torque, with the unit of torque NM.
It should be understood that the high torque segment curve refers to a curve corresponding to a high torque segment in the clutch characteristic curve, and the torque value corresponding to a specific high torque segment is not particularly limited in this embodiment.
In a specific implementation, after the high torque section curve in the clutch characteristic curve is obtained, the self-adaptive working condition of the high torque section clutch characteristic curve needs to be identified, which may include: 1. activating a non-gear shifting working condition, wherein the clutch is in a slip control state; 2. the engine speed is greater than a certain value, and can be set to 1000rpm; 3. the change rate of the engine speed is stable; 4. the engine torque is greater than a certain value, which can be set to 60Nm; 5. the change rate of the engine torque is stable; 6. the clutch position or the pressure change rate is stable; 7. the speed of the vehicle is greater than a certain value and can be set to be 20Km/h; 8. the actual gear is larger than 1 gear; 9. the gearbox and the engine have no faults; 10. the water temperature of the engine is normal; 11. the target gear is in place; 12. the clutch is not in an over-temperature state; 13. the adaptation time is greater than a certain value from the last trigger. When the whole vehicle state at the current moment is recognized to meet the self-adaptive condition, the next stage can be entered, namely the torque deviation percentage corresponding to the high torque section curve is obtained.
Step S20: acquiring a torque deviation percentage corresponding to the high torque section curve;
further, in order to accurately determine the torque deviation percentage, in the present embodiment, the step S20 includes: acquiring the corresponding engine torque of the vehicle to be treated; determining a nominal clutch torque according to the high torque segment curve; determining a torque offset from the engine torque and the nominal clutch torque; and determining a torque deviation percentage corresponding to the high torque section curve according to the torque deviation and the nominal clutch torque.
It can be appreciated that the engine torque corresponding to the vehicle to be treated can be calculated by the following formula:
wherein T is EngTrans Torque actually applied to the clutch end for the engine; t (T) ActualEng For receiving an actual torque from the engine; j (J) Eng Is the rotational inertia of the engine;is the rate of change of engine speed; k (K) Eng The damping coefficient is the air damping coefficient of the engine bin; n is n Eng Is the engine speed.
It should be appreciated that the nominal clutch torque is not the actual torque transmitted by the clutch, but rather the torque calculated from the clutch characteristics of the high torque segment, with the specific formula:
T Cluth ＝f(p)+T TempOffset
wherein T is Clut□ Is the nominal clutch torque; f (p) is torque obtained by reversely checking the clutch characteristic curve of the high torque section by the clutch pressure or position, namely, the torque can be obtained by checking the clutch characteristic curve of the high torque section by knowing the clutch pressure or position; TT (TT) empOffset And finding two clutch characteristic curves for torque deviation between the current clutch temperature and the temperature corresponding to the reversely checked clutch characteristic curve of the high torque section, namely knowing the current clutch temperature and the temperature corresponding to the clutch characteristic curve of the high torque section, and obtaining the torque deviation between the two clutch characteristic curves.
In specific implementation, the torque deviation corresponding to the high torque section curve can be determined according to the engine torque and the nominal clutch torque, and a specific calculation formula is as follows:
T Error ＝T EngTrans -T Cluth
wherein T is Error For torque deviation, T EngTrans For engine torque, T Cluth Is the nominal clutch torque. In addition, the torque deviation percentage can be calculated according to the following formula:
ErrorPercent＝T Error /T Cluth
wherein ErrorPercent is the torque deviation percentage, T Error For torque deviation, T Cluth Is the nominal clutch torque.
Step S30: and when the torque deviation percentage is larger than a preset threshold value, correcting the high-torque section curve according to the deviation torque point in the high-torque section curve.
It can be understood that the preset threshold is a preset threshold, and the specific value may be set according to the actual situation, which is not particularly limited in this embodiment.
It should be understood that the deviated torque point in the high torque section curve refers to a point in the high torque section curve where there is a torque deviation, i.e., a point where correction is required.
In a specific implementation, when the torque deviation percentage is greater than a preset threshold value, the clutch characteristic curve is considered to deviate in the high torque section, and self-adaption is needed, namely, the high torque section curve needs to be corrected.
According to the embodiment, the high torque section curve in the clutch characteristic curve is obtained, then the torque deviation percentage corresponding to the high torque section curve is obtained, and when the torque deviation percentage is larger than a preset threshold value, the high torque section curve is corrected according to the deviation torque point in the high torque section curve. According to the embodiment, the torque deviation percentage corresponding to the high-torque section curve is obtained, when the torque deviation percentage is larger than the preset threshold value, it is indicated that the clutch characteristic curve of the high-torque section needs to be corrected, and at the moment, the high-torque section curve is corrected according to the deviation torque point in the high-torque section curve, so that the clutch characteristic curve of the high-torque section can be accurately corrected, the clutch characteristic curve of the high-torque section is more attached to an engine-gearbox power system, and the drivability and fuel economy of a vehicle are improved.
Referring to fig. 4, fig. 4 is a flowchart illustrating a second embodiment of a method for correcting a clutch characteristic curve according to the present invention.
Based on the first embodiment, in this embodiment, the step S30 includes:
step S301: when the torque deviation percentage is larger than a preset threshold value, determining a deviation torque point in the high torque section curve according to the torque deviation;
it should be understood that the present embodiment can calculate the deviation torque point in the high torque segment curve by the following formula:
T ErrorPoint ＝∫ 0 T Cluth *dt/t
wherein T is ErrorPoint Is the deviation torque point in the curve of the high torque section, T Error Is the torque deviation corresponding to the high torque section curve.
Step S302: acquiring a deviation torque point index value of the torque deviation point in the high-torque section curve;
the offset torque point index value refers to an index value of the offset torque point in the high torque section curve, and since the high torque section curve can be fitted by a plurality of reference points, the number of reference points of the torque offset point can be found, which corresponds to the offset torque point index value.
Further, in order to accurately determine the offset torque point index value, in this embodiment, the step S302 includes: obtaining target torque of the torque deviation point in the high-torque section curve; acquiring a reference torque set corresponding to each reference point in the high torque section curve; and comparing the target torque with each reference torque in the reference torque set, and determining a deviation torque point index value of the torque deviation point in the high-torque section curve according to a comparison result.
The target torque refers to the torque of the torque deviation point in the high torque section curve, and the reference torque set refers to a set of torques corresponding to each reference point in the high torque section curve.
It can be understood that, since the high torque segment curve is generally monotonically increasing, that is, the torque monotonically increases, the comparison result obtained after comparing the target torque with each reference torque in the reference torque set may be that the target torque is the same as or the difference between the target torque and each reference torque in the reference torque set is smaller, and then the index value corresponding to the reference torque, that is, the offset torque point index value, is obtained. For example: the target torque is 10, the reference torque set is [2,3,4,5,6,7,8,9,10,11], and the offset torque point index value is "10" at a position in the reference torque set, i.e., 9.
Step S303: and correcting the high-torque section curve according to the deviation torque point index value.
In a specific implementation, a point to be corrected on the high torque section curve can be found according to the deviation torque point index value, and then the high torque section curve is corrected.
When the torque deviation percentage is larger than a preset threshold value, the deviation torque point in the high-torque section curve is determined according to the torque deviation, then a deviation torque point index value of the torque deviation point in the high-torque section curve is obtained, and then the high-torque section curve is corrected according to the deviation torque point index value. According to the embodiment, the deviation torque point index value of the torque deviation point in the high torque section curve is obtained, and the point corresponding to the deviation torque point index value is corrected, so that the point to be corrected can be accurately positioned, the curve correction time is shortened, and the clutch characteristic curve of the high torque section can be accurately corrected.
Referring to fig. 5, fig. 5 is a flowchart illustrating a third embodiment of a method for correcting a clutch characteristic curve according to the present invention.
Based on the above embodiments, in this embodiment, the step S303 includes:
step S3031: determining a correction point index value of the high torque section curve according to the deviation torque point index value;
it will be appreciated that in order to more accurately correct the clutch characteristic curve of the high torque segment, in addition to correcting the point corresponding to the offset torque point index value, a plurality of points around the point may be corrected simultaneously, where the offset torque point index value is N, the corrected point index values may be n+k and N-K, where K is any natural number, such as 0,1, 2 … …
Step S3032: acquiring a correction value corresponding to the correction point index value;
the correction value refers to a value to which the torque of the reference point corresponding to the correction point index value needs to be corrected, that is, an original value corresponding to the correction point index value needs to be changed to the correction value.
Further, in order to accurately determine the correction value, in this embodiment, the step S3032 includes: acquiring an original value corresponding to the index value of the correction point from the high-torque section curve; determining a torque compensation value according to the torque deviation; and determining a correction value corresponding to the correction point index value according to the torque deviation, the original value, the deviation torque point index value and the torque compensation value.
It should be understood that the original value refers to the torque value of the reference point corresponding to the correction point index value in the high torque segment curve. In this embodiment, the TP point may be the 0 th torque reference point, and the TP point is the clutch half-engagement point.
Further, in order to accurately determine the correction value, in this embodiment, the step of determining the correction value corresponding to the correction point index value according to the torque deviation, the original value, and the deviation torque point index value and the torque compensation value specifically includes: determining a correction value corresponding to the correction point index value according to the torque deviation, the original value, the deviation torque point index value and the torque compensation value through a preset formula, wherein the preset formula is as follows:
T NewPoint(N+K) ＝T OldPoint(N+K) +T Error *Fator+K*T offset
wherein T is NewPoint(N+K) Indicating the correction value corresponding to the correction point index value, n+K indicating the correction point index value, T OldPoint(N+K) Representing the original value corresponding to the index value of the correction point, T Error Indicating torque deviation, and Fator indicating correction factor, T offset Representing the torque compensation value.
It is understood that the (n+k) maximum value is IDXMAX, which is an index value corresponding to the maximum torque value in the high torque segment curve.
Step S3033: and correcting the high torque section curve according to the correction value.
It will be appreciated that after the correction values are obtained, new reference points (0, TP), (1, T) may be obtained OldPoint(1) )……、(N-1，T OldPoint(N-1) )、(N，T NewPoint(N) )、(N+1，T NewPoint(N+1) )……(IDXMAX，T NewPoint(IDXMAX) ) Fitting is carried out, and a new clutch characteristic curve of the high torque section is obtained.
In a specific implementation, the reference point corresponding to the index value of the correction point may be corrected according to the correction value, and in particular, referring to fig. 6, fig. 6 is a schematic diagram of a corrected gao torque segment curve according to an embodiment of the method for correcting a clutch characteristic curve according to the present invention. As shown in fig. 6, the solid line represents the high torque section curve before correction, and the broken line represents the high torque section curve after correction.
According to the embodiment, the correction point index value of the high-torque section curve is determined according to the deviation torque point index value, then the correction value corresponding to the correction point index value is obtained, and the high-torque section curve is corrected according to the correction value. According to the embodiment, the correction point index value of the high-torque section curve is determined according to the deviation torque point index value, so that more correction points on the high-torque section curve can be provided, the high-torque section curve is corrected according to the correction value, the clutch characteristic curve of the high-torque section can be accurately corrected, the clutch characteristic curve of the high-torque section is enabled to be more attached to an engine-gearbox power system, and the drivability and the fuel economy of a vehicle are improved.
Referring to fig. 7, fig. 7 is a block diagram showing a first embodiment of a clutch characteristic curve correction device according to the present invention.
As shown in fig. 7, the device for correcting a clutch characteristic curve according to an embodiment of the present invention includes:
a curve acquisition module 10, configured to acquire a high torque section curve in a clutch characteristic curve;
the deviation obtaining module 20 is configured to obtain a torque deviation percentage corresponding to the high torque section curve;
and the curve correction module 30 is configured to correct the high torque section curve according to the deviation torque point in the high torque section curve when the torque deviation percentage is greater than a preset threshold.
According to the embodiment, the high torque section curve in the clutch characteristic curve is obtained, then the torque deviation percentage corresponding to the high torque section curve is obtained, and when the torque deviation percentage is larger than a preset threshold value, the high torque section curve is corrected according to the deviation torque point in the high torque section curve. According to the embodiment, the torque deviation percentage corresponding to the high-torque section curve is obtained, when the torque deviation percentage is larger than the preset threshold value, it is indicated that the clutch characteristic curve of the high-torque section needs to be corrected, and at the moment, the high-torque section curve is corrected according to the deviation torque point in the high-torque section curve, so that the clutch characteristic curve of the high-torque section can be accurately corrected, the clutch characteristic curve of the high-torque section is more attached to an engine-gearbox power system, and the drivability and fuel economy of a vehicle are improved.
It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.
In addition, technical details not described in detail in the present embodiment may refer to the method for correcting the clutch characteristic curve provided in any embodiment of the present invention, which is not described herein.
A second embodiment of the clutch characteristic curve correction device according to the present invention is proposed based on the first embodiment of the clutch characteristic curve correction device according to the present invention.
In this embodiment, the deviation obtaining module 20 is further configured to obtain an engine torque corresponding to the vehicle to be processed; determining a nominal clutch torque according to the high torque segment curve; determining a torque offset from the engine torque and the nominal clutch torque; and determining a torque deviation percentage corresponding to the high torque section curve according to the torque deviation and the nominal clutch torque.
Further, the curve correction module 30 is further configured to determine a deviation torque point in the high torque section curve according to the torque deviation when the torque deviation percentage is greater than a preset threshold; acquiring a deviation torque point index value of the torque deviation point in the high-torque section curve; and correcting the high-torque section curve according to the deviation torque point index value.
Further, the curve correction module 30 is further configured to obtain a target torque of the torque deviation point in the high torque section curve; acquiring a reference torque set corresponding to each reference point in the high torque section curve; and comparing the target torque with each reference torque in the reference torque set, and determining a deviation torque point index value of the torque deviation point in the high-torque section curve according to a comparison result.
Further, the curve correction module 30 is further configured to determine a correction point index value of the high torque segment curve according to the deviation torque point index value; acquiring a correction value corresponding to the correction point index value; and correcting the high torque section curve according to the correction value.
Further, the curve correction module 30 is further configured to obtain an original value corresponding to the correction point index value from the high torque segment curve; determining a torque compensation value according to the torque deviation; and determining a correction value corresponding to the correction point index value according to the torque deviation, the original value, the deviation torque point index value and the torque compensation value.
Further, the curve correction module 30 is further configured to determine a correction value corresponding to the correction point index value according to the torque deviation, the original value, and the deviation torque point index value and the torque compensation value by using a preset formula, where the preset formula is:
T NewPoint(N+K) ＝T OldPoint(N+K) +T Error *Fator+K*T offset
wherein T is NewPoint(N+K) Indicating the correction value corresponding to the correction point index value, n+K indicating the correction point index value, T OldPoint(N+K) Representing the original value corresponding to the index value of the correction point, T Error Indicating torque deviation, and Fator indicating correction factor, T offset Representing the torque compensation value.
Other embodiments or specific implementations of the device for correcting a clutch characteristic curve according to the present invention may refer to the above method embodiments, and will not be described herein.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium stores a correction program of the clutch characteristic curve, and the correction program of the clutch characteristic curve realizes the steps of the correction method of the clutch characteristic curve when being executed by a processor.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. read-only memory/random-access memory, magnetic disk, optical disk), comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (7)
1. A method for correcting a clutch characteristic, the method comprising the steps of:
acquiring a high torque section curve in a clutch characteristic curve;
acquiring a torque deviation percentage corresponding to the high torque section curve;
when the torque deviation percentage is larger than a preset threshold value, correcting the high-torque section curve according to deviation torque points in the high-torque section curve;
the step of obtaining the torque deviation percentage corresponding to the high torque section curve specifically comprises the following steps:
acquiring the corresponding engine torque of the vehicle to be treated;
determining a nominal clutch torque according to the high torque segment curve;
determining a torque offset from the engine torque and the nominal clutch torque;
determining a torque deviation percentage corresponding to the high torque section curve according to the torque deviation and the nominal clutch torque;
the step of determining the nominal clutch torque according to the high torque section curve specifically comprises the following steps:
determining a nominal clutch torque according to the high torque segment curve through a first formula, wherein the first formula is as follows:
T Cluth ＝f(p)+T TempOffset
wherein T is Cluth For nominal clutch torque, f (p) is the torque from the clutch pressure or position back-checking clutch characteristic curve of the high torque segment, T Tempoffset The torque deviation between the current clutch temperature and the temperature corresponding to the clutch characteristic curve of the reversely checked high torque section is obtained;
the step of determining a torque deviation from the engine torque and the nominal clutch torque specifically comprises:
determining a torque offset from the engine torque and the nominal clutch torque by a second formula, wherein the second formula is:
T Error ＝T EngTrans -T Cluth
wherein T is Error For torque deviation, T EngTrans For engine torque, T Cluth Is the nominal clutch torque;
the step of determining the torque deviation percentage corresponding to the high torque section curve according to the torque deviation and the nominal clutch torque specifically comprises the following steps:
determining a torque deviation percentage corresponding to the high torque section curve according to the torque deviation and the nominal clutch torque through a third formula, wherein the third formula is as follows:
ErrorPercent＝T Error /T cluth
wherein ErrorPercent is the torque deviation percentage, T Error For torque deviation, T Cluth Is the nominal clutch torque.
2. The method for correcting a clutch characteristic according to claim 1, wherein the step of correcting the high torque section curve according to the deviation torque point in the high torque section curve when the torque deviation percentage is greater than a preset threshold value specifically includes:
when the torque deviation percentage is larger than a preset threshold value, determining a deviation torque point in the high torque section curve according to the torque deviation;
acquiring a deviation torque point index value of the torque deviation point in the high-torque section curve;
correcting the high-torque section curve according to the deviation torque point index value;
the step of obtaining the deviation torque point index value of the torque deviation point in the high torque section curve specifically comprises the following steps:
obtaining target torque of the torque deviation point in the high-torque section curve;
acquiring a reference torque set corresponding to each reference point in the high torque section curve;
comparing the target torque with each reference torque in the reference torque set, and determining a deviation torque point index value of the torque deviation point in the high-torque section curve according to a comparison result;
the step of correcting the high torque section curve according to the deviation torque point index value specifically includes:
determining a correction point index value of the high torque section curve according to the deviation torque point index value, wherein the correction point index value comprises a plurality of index values before and after the deviation torque point index value;
acquiring a correction value corresponding to the correction point index value;
and correcting the high torque section curve according to the correction value.
3. The method for correcting a clutch characteristic according to claim 2, wherein the step of obtaining the correction value corresponding to the correction point index value specifically includes:
acquiring an original value corresponding to the index value of the correction point from the high-torque section curve;
determining a torque compensation value according to the torque deviation;
and determining a correction value corresponding to the correction point index value according to the torque deviation, the original value, the deviation torque point index value and the torque compensation value.
4. The method for correcting a clutch characteristic according to claim 3, wherein the step of determining the correction value corresponding to the correction point index value based on the torque deviation, the original value, the deviation torque point index value, and the torque compensation value specifically includes:
determining a correction value corresponding to the correction point index value according to the torque deviation, the original value, the deviation torque point index value and the torque compensation value through a preset formula, wherein the preset formula is as follows:
T NewPoint(N+K) ＝T OldPoint(N+K) +T Error *Fator+K*T offset
wherein T is NewPoint(N+K) Indicating the correction value corresponding to the correction point index value, n+K indicating the correction point index value, T oldPoint(N+K) Representing the original value corresponding to the index value of the correction point, T Error Represents torque deviation, and Fator represents correction coefficient, K is arbitrary natural number, T offset Representing the torque compensation value.
5. A correction device for a clutch characteristic, the correction device comprising:
the curve acquisition module is used for acquiring a high torque section curve in the clutch characteristic curve;
the deviation acquisition module is used for acquiring the torque deviation percentage corresponding to the high torque section curve;
the curve correction module is used for correcting the high-torque section curve according to the deviation torque point in the high-torque section curve when the torque deviation percentage is larger than a preset threshold value;
the deviation acquisition module is also used for acquiring the engine torque corresponding to the vehicle to be processed; determining a nominal clutch torque according to the high torque segment curve; determining a torque offset from the engine torque and the nominal clutch torque; determining a torque deviation percentage corresponding to the high torque section curve according to the torque deviation and the nominal clutch torque;
the deviation acquisition module is further configured to determine a nominal clutch torque according to the high torque segment curve through a first formula, where the first formula is:
T Cluth ＝f(p)+T TempOffset
wherein T is Cluth For nominal clutch torque, f (p) is the torque from the clutch pressure or position back-checking clutch characteristic curve of the high torque segment, T TempOffset The torque deviation between the current clutch temperature and the temperature corresponding to the clutch characteristic curve of the reversely checked high torque section is obtained;
the deviation acquisition module is further configured to determine a torque deviation according to the engine torque and the nominal clutch torque through a second formula, where the second formula is:
T Error ＝T EngTrans -T Cluth
wherein T is Error For torque deviation, T EngTrans For engine torque, T Cluth Is the nominal clutch torque;
the deviation obtaining module is further configured to determine a torque deviation percentage corresponding to the high torque section curve according to the torque deviation and the nominal clutch torque through a third formula, where the third formula is:
ErrorPercent＝T Error /T cluth
wherein ErrorPercent is the torque deviation percentage, T Error For torque deviation, T Cluth Is the nominal clutch torque.
6. A correction apparatus for a clutch characteristic, the apparatus comprising: a memory, a processor and a correction program for a clutch characteristic stored on the memory and operable on the processor, the correction program for a clutch characteristic being configured to implement the steps of the method for correcting a clutch characteristic as claimed in any one of claims 1 to 4.
7. A storage medium, wherein a correction program of a clutch characteristic is stored on the storage medium, and the correction program of the clutch characteristic realizes the steps of the correction method of the clutch characteristic according to any one of claims 1 to 4 when executed by a processor.
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