Clutch torque characteristic curve generation method, medium, device, and vehicle
By generating a clutch torque characteristic curve, the problem of inaccurate clutch torque curve generation in the prior art is solved, and stable control of the clutch is achieved throughout the entire torque stage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HYCET TRANSMISSION SYST (JIANGSU) CO LTD
- Filing Date
- 2023-01-17
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies cannot accurately meet the full torque range of the clutch when generating the clutch torque curve, resulting in unstable control.
The required breakpoint torque characteristic curve is generated by acquiring measured torque data, and after correction, a linear soft-range torque method is obtained. Combined with the underlying parameters of the software, the characteristic curve of the rapidly changing region is calculated, and finally the clutch torque characteristic curve is generated.
This improves the accuracy of clutch torque measurement, enabling the clutch torque characteristic curve to cover the entire torque range and enhancing clutch control stability.
Smart Images
Figure CN116049985B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of clutch control technology, and in particular to a method, medium, device and vehicle for generating clutch torque characteristic curves. Background Technology
[0002] As a gear-shifting or disengaging device, the clutch is widely used in hybrid transmissions due to its rapid response and simple control. The torque transmission of a multi-plate clutch is actually the transmission of frictional torque between the clutch friction plates, and the clutch torque characteristics are the decisive factor affecting the stability of clutch control.
[0003] In related technologies, the generation of clutch torque curves often involves linear interpolation of measured data, leading to unstable clutch control. Furthermore, this method fails to accurately measure torque values across the entire clutch torque spectrum, particularly at high torque levels. Summary of the Invention
[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this invention is to provide a method for generating a clutch torque characteristic curve, which can effectively improve the accuracy of clutch torque values; simultaneously, it ensures that the torque of the clutch torque characteristic curve can satisfy the full torque range of the clutch, thereby improving the control stability of the clutch.
[0005] In a first aspect, embodiments of the present invention propose a method for generating a clutch torque characteristic curve, comprising: acquiring measured torque data, generating a required breakpoint torque characteristic curve based on the measured torque data, and correcting the required breakpoint torque characteristic curve to obtain a linear soft-range torque characteristic curve; acquiring software underlying parameters, and calculating a corresponding rapid change zone characteristic curve based on the software underlying parameters and the linear soft-range torque characteristic curve; and generating a clutch torque characteristic curve based on the linear soft-range torque characteristic curve and the rapid change zone characteristic curve.
[0006] According to the clutch torque characteristic curve generation method of the present invention, firstly, measured torque data is acquired, and a required breakpoint torque characteristic curve is generated based on the measured torque data. The required breakpoint torque characteristic curve is then corrected to obtain a linear soft-range torque characteristic curve, thereby improving the accuracy of the linear soft-range torque characteristic curve. Next, software underlying parameters are acquired, and a corresponding rapid change zone characteristic curve is calculated based on the software underlying parameters and the linear soft-range torque characteristic curve, so that the clutch torque characteristic curve covers the entire torque range. Then, a clutch torque characteristic curve is generated based on the linear soft-range torque characteristic curve and the rapid change zone characteristic curve. This effectively improves the accuracy of clutch torque value acquisition and ensures that the torque of the clutch torque characteristic curve meets the requirements of the entire clutch torque range, thereby improving the control stability of the clutch.
[0007] In some embodiments, generating a demand breakpoint torque characteristic curve based on the measured torque data includes: preprocessing the measured torque data to obtain measured rise data and measured fall data, wherein the measured rise data includes rise torque corresponding to different pressure values, and the measured fall data includes fall torque corresponding to different pressure values; performing linear interpolation based on the measured rise data to obtain torque breakpoint rise data, and performing linear interpolation based on the measured fall data to obtain torque breakpoint fall data; and generating a demand breakpoint torque characteristic curve based on the torque breakpoint rise data and the torque breakpoint fall data, wherein the demand breakpoint torque characteristic curve includes a demand breakpoint torque rise curve and a demand breakpoint torque fall curve.
[0008] In some embodiments, correcting the demand breakpoint torque characteristic curve to obtain a linear soft-range torque characteristic curve includes: obtaining a first rising pressure and a first falling pressure corresponding to the same torque based on the demand breakpoint torque rising curve and the demand breakpoint torque falling curve; calculating a first difference between the first rising pressure and the first falling pressure, and determining whether the first difference is less than a preset hysteresis value; if the first difference is less than the preset hysteresis value, calculating a second difference between the first rising pressure and the preset hysteresis value, and correcting the first falling pressure based on the second difference.
[0009] In some embodiments, the underlying software parameters include an ascending gradient and a descending gradient. Calculating the corresponding rapid change region characteristic curve based on the underlying software parameters and the linear soft-spot torque characteristic curve includes: calculating the breakpoint difference based on the ascending gradient and the demand breakpoint torque ascending curve to obtain the rapid change region characteristic ascending curve; and calculating the breakpoint pressure based on the descending gradient and the corrected demand breakpoint torque descending curve to generate the rapid change region characteristic descending curve.
[0010] In some embodiments, generating a clutch torque characteristic curve based on the linear soft zone torque characteristic curve and the rapid change zone characteristic curve includes: generating a clutch torque characteristic rising curve based on the demand breakpoint torque rising curve and the rapid change zone characteristic rising curve; and generating a clutch torque characteristic falling curve based on the corrected demand breakpoint torque falling curve and the rapid change zone characteristic falling curve.
[0011] In some embodiments, the generation method further includes: obtaining a second rising pressure and a second falling pressure corresponding to the same torque based on the clutch torque characteristic rising curve and the clutch torque characteristic falling curve; calculating a third difference between the second rising pressure and the second falling pressure, and determining whether the third difference is less than the preset hysteresis value; if the third difference is less than the preset hysteresis value, calculating a fourth difference between the second rising pressure and the preset hysteresis value, and correcting the second falling pressure based on the fourth difference.
[0012] Secondly, embodiments of the present invention provide a computer-readable storage medium storing a clutch torque characteristic curve generation program thereon, which, when executed by a processor, implements the clutch torque characteristic curve generation method as described above.
[0013] According to an embodiment of the present invention, a computer-readable storage medium stores a clutch torque characteristic curve generation program, so that when the processor executes the clutch torque characteristic curve generation program, it implements the clutch torque characteristic curve generation method as described above, thereby effectively improving the accuracy of clutch torque value; at the same time, it ensures that the torque of the clutch torque characteristic curve can meet the full torque stage of the clutch, thereby improving the control stability of the clutch.
[0014] Thirdly, embodiments of the present invention propose a clutch torque characteristic curve generation device, comprising: an acquisition module, wherein the acquisition module is used to acquire measured torque data and generate a required breakpoint torque characteristic curve based on the measured torque data; a correction module, wherein the correction module is used to correct the required breakpoint torque characteristic curve to obtain a linear soft-range torque characteristic curve; a calculation module, wherein the calculation module is used to acquire software underlying parameters and calculate a corresponding rapid change zone characteristic curve based on the software underlying parameters and the linear soft-range torque characteristic curve; and a generation module, wherein the generation module is used to generate a clutch torque characteristic curve based on the linear soft-range torque characteristic curve and the rapid change zone characteristic curve.
[0015] The clutch torque characteristic curve generation device according to an embodiment of the present invention includes an acquisition module for acquiring measured torque data and generating a required breakpoint torque characteristic curve based on the measured torque data; a correction module for correcting the required breakpoint torque characteristic curve to obtain a linear soft-range torque characteristic curve; a calculation module for acquiring software underlying parameters and calculating a corresponding rapid change zone characteristic curve based on the software underlying parameters and the linear soft-range torque characteristic curve; and a generation module for generating a clutch torque characteristic curve based on the linear soft-range torque characteristic curve and the rapid change zone characteristic curve. This effectively improves the accuracy of clutch torque value acquisition and ensures that the torque of the clutch torque characteristic curve meets the requirements of the clutch's full torque range, thereby improving the clutch's control stability.
[0016] In some embodiments, the acquisition module is further configured to preprocess the measured torque data to obtain measured rise data and measured fall data, wherein the measured rise data includes rise torque corresponding to different pressure values, and the measured fall data includes fall torque corresponding to different pressure values; perform linear interpolation based on the measured rise data to obtain torque breakpoint rise data, and perform linear interpolation based on the measured fall data to obtain torque breakpoint fall data; generate a demand breakpoint torque characteristic curve based on the torque breakpoint rise data and the torque breakpoint fall data, wherein the demand breakpoint torque characteristic curve includes a demand breakpoint torque rise curve and a demand breakpoint torque fall curve.
[0017] Fourthly, embodiments of the present invention provide a vehicle equipped with a clutch torque characteristic curve generation device as described above.
[0018] According to an embodiment of the present invention, a clutch torque characteristic curve generating device is installed in the vehicle to generate a clutch torque characteristic curve; thereby effectively improving the accuracy of clutch torque value; at the same time, the torque of the clutch torque characteristic curve can meet the full torque range of the clutch, thereby improving the control stability of the clutch.
[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0020] Figure 1 This is a schematic flowchart of a method for generating a clutch torque characteristic curve according to an embodiment of the present invention;
[0021] Figure 2 This is a schematic diagram of the clutch torque characteristic curve according to an embodiment of the present invention;
[0022] Figure 3 This is a block diagram of a clutch torque characteristic curve generation device according to an embodiment of the present invention. Detailed Implementation
[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0024] The method for generating a clutch torque characteristic curve according to an embodiment of the present invention is described below with reference to the accompanying drawings.
[0025] Please see Figure 1 , Figure 1 This is a schematic flowchart of a clutch torque characteristic curve generation method according to an embodiment of the present invention, as shown below. Figure 1 As shown, the method for generating the clutch torque characteristic curve includes the following steps:
[0026] S101, acquire the measured torque data, generate the required breakpoint torque characteristic curve based on the measured torque data, and correct the required breakpoint torque characteristic curve to obtain the linear soft zone torque characteristic curve.
[0027] In some embodiments, generating a demand breakpoint torque characteristic curve based on measured torque data includes: preprocessing the measured torque data to obtain measured rise data and measured fall data, wherein the measured rise data includes the rise torque corresponding to different pressure values, and the measured fall data includes the fall torque corresponding to different pressure values; performing linear interpolation based on the measured rise data to obtain torque breakpoint rise data, and performing linear interpolation based on the measured fall data to obtain torque breakpoint fall data; and generating a demand breakpoint torque characteristic curve based on the torque breakpoint rise data and torque breakpoint fall data, wherein the demand breakpoint torque characteristic curve includes a demand breakpoint torque rise curve and a demand breakpoint torque fall curve.
[0028] As an example, firstly, the measured torque characteristic data is analyzed to obtain the measured rise and fall data. The measured rise data includes the rise torque corresponding to different pressure values, and the measured fall data includes the fall torque corresponding to different pressure values. Specifically, the rise and fall torques are reduced by the drag torque under no pressure. The specific measured rise and fall data are shown in Table 1.
[0029] Increased torque 26.82 35.74 36.09 44.97 132.0 209.4 287.7 Downward pressure 9 7 5 3 2.8 2.6 2.4 2.2 Decreasing torque 288.1 207.6 127.7 52.28 39.94 33.80 31.18 24.66
[0030] Table 1
[0031] Next, linear interpolation is performed based on the measured rising data and the measured falling data to obtain the torque breakpoint rising data and the torque breakpoint falling data. Specifically, the torque breakpoint rising data and the torque breakpoint falling data are shown in Table 2:
[0032] Pressure on rising demand 2.471 3.116 3.69 4.265 4.839 5.464 6.755 / Demand decline torque 30 50 75 100 125 150 200 550 Pressure from declining demand 2.364 2.963 3.602 4.264 4.926 5.556 6.809 /
[0033] Table 2
[0034] Furthermore, a demand breakpoint torque characteristic curve can be generated based on the torque breakpoint rising data and the torque breakpoint falling data.
[0035] In some embodiments, correcting the demand breakpoint torque characteristic curve to obtain a linear soft zone torque characteristic curve includes: obtaining a first rising pressure and a first falling pressure corresponding to the same torque according to the demand breakpoint torque rising curve and the demand breakpoint torque falling curve; calculating a first difference between the first rising pressure and the first falling pressure, and determining whether the first difference is less than a preset hysteresis value; if the first difference is less than the preset hysteresis value, calculating a second difference between the first rising pressure and the preset hysteresis value, and correcting the first falling pressure according to the second difference.
[0036] As an example, assume that the preset hysteresis value is X, and the preset hysteresis value can be obtained according to the formula X = hys * a; where hys is the hysteresis parameter and a is the hysteresis coefficient; then, assume that the first rising pressure is PU[i] and the first falling pressure is PD[i]; then, determine whether PU[i] - PD[i] < X, and if so, set PD[i] = PU[i] - X to complete the correction of the first falling pressure.
[0037] S102, obtain software underlying parameters, and calculate a corresponding fast change zone characteristic curve according to the software underlying parameters and the linear soft zone torque characteristic curve.
[0038] In some embodiments, the software underlying parameters include a rising gradient and a falling gradient. Among them, calculating a corresponding fast change zone characteristic curve according to the software underlying parameters and the linear soft zone torque characteristic curve includes: performing breakpoint difference calculation based on the rising gradient and the demand breakpoint torque rising curve to obtain a fast change zone characteristic rising curve; performing breakpoint pressure calculation based on the falling gradient and the corrected demand breakpoint torque falling curve to generate a fast change zone characteristic falling curve.
[0039] As an example, assume the ascending gradient is GU and the descending gradient is GD; then, the rapid change zone characteristic rise curve can be obtained by linear interpolation of the demand breakpoint torque rise curve (it should be noted that the demand breakpoint torque rise curve is the linear soft zone torque characteristic rise curve); specifically, the rapid change zone characteristic rise curve can be calculated according to the following formula: PU[j]=GU*PU[i-1]; where PU[j] represents the j-th rising pressure value in the rapid change zone characteristic rise curve, and PU[i-1] represents the i-th rising pressure value in the linear soft zone torque characteristic rise curve. -1 upward pressure value; then, the rapid change zone characteristic decline curve can be obtained by calculating the breakpoint pressure based on the demand breakpoint torque decline curve; specifically, the rapid change zone characteristic decline curve can be calculated according to the following formula: PD[j]=GD*BD+PD[j-1]; where PD[j] represents the j-th decline pressure value in the rapid change zone characteristic decline curve, PD[j-1] represents the (j-1)-th decline pressure value in the rapid change zone characteristic decline curve, and BD represents the difference between the torque value corresponding to the j-th decline pressure value and the torque value corresponding to the (j-1)-th decline pressure value.
[0040] S103 generates the clutch torque characteristic curve based on the linear soft zone torque characteristic curve and the rapid change zone characteristic curve.
[0041] In some embodiments, generating the clutch torque characteristic curve based on the linear soft zone torque characteristic curve and the rapid change zone characteristic curve includes: generating a clutch torque characteristic rising curve based on the demand breakpoint torque rising curve and the rapid change zone characteristic rising curve; and generating a clutch torque characteristic falling curve based on the modified demand breakpoint torque falling curve and the rapid change zone characteristic falling curve.
[0042] As an example, such as Figure 2 As shown, Figure 2 This is a schematic diagram of the clutch torque characteristic curve in a specific embodiment. Specifically, after generating the clutch torque characteristic curve, writing the clutch torque characteristic curve to the software's underlying layer can effectively improve the accuracy of the clutch torque value; at the same time, it ensures that the torque of the clutch torque characteristic curve can meet the full torque range of the clutch, thereby improving the clutch's control stability.
[0043] In some embodiments, in order to further improve the accuracy of the final clutch torque characteristic curve, the clutch torque characteristic curve generation method further includes: obtaining a second rising pressure and a second falling pressure corresponding to the same torque according to the clutch torque characteristic rising curve and the clutch torque characteristic falling curve; calculating a third difference between the second rising pressure and the second falling pressure, and determining whether the third difference is less than a preset hysteresis value; if the third difference is less than the preset hysteresis value, calculating a fourth difference between the second rising pressure and the preset hysteresis value, and correcting the second falling pressure according to the fourth difference.
[0044] As an example, assume that the second rising pressure is PU[k] and the second falling pressure is PD[k]; then, determine whether PU[k] - PD[k] < X, and if so, set PD[k] = PU[k] - X; to complete the correction of the second falling pressure.
[0045] In summary, according to the clutch torque characteristic curve generation method of the embodiments of the present invention, first, measured torque data is obtained, and a required break point torque characteristic curve is generated according to the measured torque data, and the required break point torque characteristic curve is corrected to obtain a linear soft zone torque characteristic curve to improve the accuracy of the linear soft zone torque characteristic curve; then, software underlying parameters are obtained, and a corresponding fast change zone characteristic curve is calculated according to the software underlying parameters and the linear soft zone torque characteristic curve, so that the clutch torque characteristic curve covers the full torque stage; then, the clutch torque characteristic curve is generated according to the linear soft zone torque characteristic curve and the fast change zone characteristic curve; thereby effectively improving the accuracy of the clutch torque value; at the same time, the torque of the clutch torque characteristic curve can meet the full torque stage of the clutch, thereby improving the control stability of the clutch.
[0046] To implement the above embodiments, an embodiment of the present invention proposes a computer-readable storage medium, on which a clutch torque characteristic curve generation program is stored, and when the clutch torque characteristic curve generation program is executed by a processor, the clutch torque characteristic curve generation method as described above is implemented.
[0047] According to the computer-readable storage medium of the embodiments of the present invention, by storing the clutch torque characteristic curve generation program, when the processor executes the clutch torque characteristic curve generation program, the clutch torque characteristic curve generation method as described above is implemented, thereby effectively improving the accuracy of the clutch torque value; at the same time, the torque of the clutch torque characteristic curve can meet the full torque stage of the clutch, thereby improving the control stability of the clutch.
[0048] To implement the above embodiments, an embodiment of the present invention proposes a clutch torque characteristic curve generation device, as Figure 3As shown, the clutch torque characteristic curve generation device includes: an acquisition module 10, a correction module 20, a calculation module 30, and a generation module 40.
[0049] The acquisition module 10 is used to acquire measured torque data and generate the required breakpoint torque characteristic curve based on the measured torque data.
[0050] The correction module 20 is used to correct the torque characteristic curve at the required breakpoint to obtain a linear soft-range torque characteristic curve.
[0051] The calculation module 30 is used to obtain the underlying software parameters and calculate the corresponding rapid change zone characteristic curve based on the underlying software parameters and the linear soft zone torque characteristic curve.
[0052] The generation module 40 is used to generate the clutch torque characteristic curve based on the linear soft zone torque characteristic curve and the rapid change zone characteristic curve.
[0053] In some embodiments, the acquisition module 10 is further configured to preprocess the measured torque data to obtain measured rise data and measured fall data, wherein the measured rise data includes the rise torque corresponding to different pressure values, and the measured fall data includes the fall torque corresponding to different pressure values; perform linear interpolation based on the measured rise data to obtain torque breakpoint rise data, and perform linear interpolation based on the measured fall data to obtain torque breakpoint fall data; generate a demand breakpoint torque characteristic curve based on the torque breakpoint rise data and the torque breakpoint fall data, wherein the demand breakpoint torque characteristic curve includes a demand breakpoint torque rise curve and a demand breakpoint torque fall curve.
[0054] In some embodiments, the underlying software parameters include an ascending gradient and a descending gradient. Calculating the corresponding rapid change region characteristic curve based on the underlying software parameters and the linear soft-spot torque characteristic curve includes: calculating the breakpoint difference based on the ascending gradient and the demand breakpoint torque ascending curve to obtain the rapid change region characteristic ascending curve; and calculating the breakpoint pressure based on the descending gradient and the corrected demand breakpoint torque descending curve to generate the rapid change region characteristic descending curve.
[0055] In some embodiments, generating the clutch torque characteristic curve based on the linear soft zone torque characteristic curve and the rapid change zone characteristic curve includes: generating a clutch torque characteristic rising curve based on the demand breakpoint torque rising curve and the rapid change zone characteristic rising curve; and generating a clutch torque characteristic falling curve based on the modified demand breakpoint torque falling curve and the rapid change zone characteristic falling curve.
[0056] In some embodiments, the method further includes: obtaining a second rising pressure and a second falling pressure corresponding to the same torque based on the clutch torque characteristic rising curve and the clutch torque characteristic falling curve; calculating a third difference between the second rising pressure and the second falling pressure, and determining whether the third difference is less than a preset hysteresis value; if the third difference is less than the preset hysteresis value, calculating a fourth difference between the second rising pressure and the preset hysteresis value, and correcting the second falling pressure based on the fourth difference.
[0057] It should be noted that the above description of the method for generating the clutch torque characteristic curve also applies to this clutch torque characteristic curve generating device, and will not be repeated here.
[0058] In summary, the clutch torque characteristic curve generation device according to an embodiment of the present invention includes: an acquisition module for acquiring measured torque data and generating a required breakpoint torque characteristic curve based on the measured torque data; a correction module for correcting the required breakpoint torque characteristic curve to obtain a linear soft-range torque characteristic curve; a calculation module for acquiring software underlying parameters and calculating a corresponding rapid change zone characteristic curve based on the software underlying parameters and the linear soft-range torque characteristic curve; and a generation module for generating a clutch torque characteristic curve based on the linear soft-range torque characteristic curve and the rapid change zone characteristic curve. This effectively improves the accuracy of clutch torque measurement and ensures that the torque of the clutch torque characteristic curve meets the requirements of the clutch throughout its full torque range, thereby improving clutch control stability.
[0059] To achieve the above embodiments, the present invention provides a vehicle equipped with a clutch torque characteristic curve generation device as described above.
[0060] According to an embodiment of the present invention, a clutch torque characteristic curve generating device is installed in the vehicle to generate a clutch torque characteristic curve; thereby effectively improving the accuracy of clutch torque value; at the same time, the torque of the clutch torque characteristic curve can meet the full torque range of the clutch, thereby improving the control stability of the clutch.
[0061] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.
[0062] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.
[0063] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0066] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0067] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0068] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A method for generating a clutch torque characteristic curve, characterized in that, include: Acquire measured torque data, generate a demand breakpoint torque characteristic curve based on the measured torque data, and correct the demand breakpoint torque characteristic curve to obtain a linear soft zone torque characteristic curve. Obtain the underlying software parameters, and calculate the corresponding rapid change region characteristic curve based on the underlying software parameters and the linear soft zone torque characteristic curve; The clutch torque characteristic curve is generated based on the linear soft-spot torque characteristic curve and the rapid change zone characteristic curve; the underlying software parameters include an ascending gradient and a descending gradient, wherein the corresponding rapid change zone characteristic curve is calculated based on the underlying software parameters and the linear soft-spot torque characteristic curve, including: Based on the rising gradient and the rising torque curve at the demand breakpoint, breakpoint interpolation calculation is performed to obtain the rising curve of the rapid change region characteristics. Breakpoint pressure is calculated based on the descent gradient and the corrected demand breakpoint torque decrease curve to generate a rapid change region characteristic decrease curve; the demand breakpoint torque characteristic curve includes a demand breakpoint torque increase curve and a demand breakpoint torque decrease curve; the demand breakpoint torque characteristic curve is corrected to obtain a linear soft region torque characteristic curve, including: Based on the demand breakpoint torque rise curve and the demand breakpoint torque fall curve, obtain the first rise pressure and the first fall pressure corresponding to the same torque; Calculate the first difference between the first upward pressure and the first downward pressure, and determine whether the first difference is less than a preset hysteresis value; If the first difference is less than the preset hysteresis value, then the second difference between the first rising pressure and the preset hysteresis value is calculated, and the first falling pressure is corrected according to the second difference.
2. The method for generating a clutch torque characteristic curve as described in claim 1, characterized in that, The required breakpoint torque characteristic curve is generated based on the measured torque data, including: The measured torque data is preprocessed to obtain measured upward data and measured downward data, wherein the measured upward data includes the upward torque corresponding to different pressure values, and the measured downward data includes the downward torque corresponding to different pressure values. Linear interpolation is performed based on the measured upward data to obtain the torque breakpoint upward data, and linear interpolation is performed based on the measured downward data to obtain the torque breakpoint downward data. The demand breakpoint torque characteristic curve is generated based on the torque breakpoint rise data and the torque breakpoint fall data.
3. The method for generating a clutch torque characteristic curve as described in claim 1, characterized in that, Generating the clutch torque characteristic curve based on the linear soft zone torque characteristic curve and the rapidly changing zone characteristic curve includes: Generate the clutch torque characteristic rise curve based on the demand breakpoint torque rise curve and the rapid change zone characteristic rise curve. The clutch torque characteristic decline curve is generated based on the modified demand breakpoint torque decline curve and the rapid change zone characteristic decline curve.
4. The method for generating a clutch torque characteristic curve as described in claim 3, characterized in that, Also includes: Based on the clutch torque characteristic rising curve and the clutch torque characteristic falling curve, obtain the second rising pressure and the second falling pressure corresponding to the same torque; Calculate the third difference between the second upward pressure and the second downward pressure, and determine whether the third difference is less than the preset hysteresis value; If the third difference is less than the preset hysteresis value, then the fourth difference between the second rising pressure and the preset hysteresis value is calculated, and the second falling pressure is corrected according to the fourth difference.
5. A computer-readable storage medium, characterized in that, It stores a clutch torque characteristic curve generation program, which, when executed by the processor, implements the clutch torque characteristic curve generation method as described in any one of claims 1-4.
6. A clutch torque characteristic curve generation device, characterized in that, include: The acquisition module is used to acquire measured torque data and generate a required breakpoint torque characteristic curve based on the measured torque data. A correction module is used to correct the required breakpoint torque characteristic curve to obtain a linear soft-zone torque characteristic curve. A calculation module is used to acquire low-level software parameters and calculate the corresponding rapid change region characteristic curve based on the low-level software parameters and the linear soft-sector torque characteristic curve. The low-level software parameters include an ascending gradient and a descending gradient. The rapid change region characteristic curve calculated based on the low-level software parameters and the linear soft-sector torque characteristic curve includes: Based on the rising gradient and the rising torque curve at the demand breakpoint, breakpoint interpolation calculation is performed to obtain the rising curve of the rapid change region characteristics. The breakpoint pressure is calculated based on the descent gradient and the corrected demand breakpoint torque descent curve to generate the characteristic descent curve of the rapid change zone. The generation module is used to generate a clutch torque characteristic curve based on the linear soft-range torque characteristic curve and the rapid change zone characteristic curve; the demand breakpoint torque characteristic curve includes a demand breakpoint torque rising curve and a demand breakpoint torque falling curve; modifying the demand breakpoint torque characteristic curve to obtain the linear soft-range torque characteristic curve includes: Based on the demand breakpoint torque rise curve and the demand breakpoint torque fall curve, obtain the first rise pressure and the first fall pressure corresponding to the same torque; Calculate the first difference between the first upward pressure and the first downward pressure, and determine whether the first difference is less than a preset hysteresis value; If the first difference is less than the preset hysteresis value, then the second difference between the first rising pressure and the preset hysteresis value is calculated, and the first falling pressure is corrected according to the second difference.
7. The clutch torque characteristic curve generation device as described in claim 6, characterized in that, The acquisition module is further configured to preprocess the measured torque data to obtain measured rise data and measured fall data, wherein the measured rise data includes the rise torque corresponding to different pressure values, and the measured fall data includes the fall torque corresponding to different pressure values. Linear interpolation is performed based on the measured upward data to obtain the torque breakpoint upward data, and linear interpolation is performed based on the measured downward data to obtain the torque breakpoint downward data. The demand breakpoint torque characteristic curve is generated based on the torque breakpoint rise data and the torque breakpoint fall data.
8. A vehicle, characterized in that, The vehicle is equipped with a clutch torque characteristic curve generation device as described in claim 6 or 7.