A wet clutch protection method and device, electronic equipment and storage medium

Abstract

The application discloses a protection method and device of a wet clutch, electronic equipment and a storage medium. The method comprises the following steps: in a combination period of a clutch of a tractor, dividing a heat stage based on a preset KP point, and calculating heat work generated by the clutch corresponding to the heat stage; obtaining heat dissipation information of the clutch, and calculating heat dissipation work of the clutch based on the heat dissipation information; calculating total heat of the clutch based on the heat work and the heat dissipation work; when the total heat of the clutch is greater than a preset first temperature threshold, executing a preset clutch protection strategy to control the clutch to separate. The application can effectively reduce the phenomenon of overheat and burnout of the clutch by accurately controlling the clutch to separate in time to reduce heat.

Description

Technical Field

[0001] This application relates to the field of wet clutch technology, and more particularly to a protection method and device for a wet clutch, an electronic device, and a storage medium. Background Technology

[0002] Modern large power shift tractors use wet clutches. Due to the complex and harsh working conditions and the large torque they bear, wet clutches are prone to overheating and burning, which seriously affects the reliability of the tractor. Therefore, in order to prevent the wet clutch of the tractor from failing, it is necessary to protect the wet clutch by controlling the clutch disengagement.

[0003] Existing methods for protecting the clutch typically rely on the temperature of the clutch cooling oil outlet to determine whether the clutch temperature protection mechanism needs to be activated. However, because the cooling oil outlet temperature is affected by the clutch cooling oil inlet temperature and requires a certain response time, it is impossible to determine in a timely and accurate manner whether the clutch temperature has reached the conditions for activating the temperature protection mechanism.

[0004] Therefore, how to accurately and efficiently protect the wet clutch is an urgent problem to be solved. Summary of the Invention

[0005] To effectively reduce the occurrence of clutch overheating and burnout, embodiments of this application provide a method and apparatus for protecting wet clutches, an electronic device, a computer-readable storage medium, and a computer program product.

[0006] Firstly, in order to solve the above-mentioned technical problems, this application provides a protection method for a wet clutch, comprising:

[0007] Within the clutch engagement cycle of the tractor, heat stages are divided based on a preset KP point, and the heat work generated by the clutch corresponding to the heat stage is calculated.

[0008] Obtain the heat dissipation information of the clutch, and calculate the heat dissipation power of the clutch based on the heat dissipation information;

[0009] The total heat of the clutch is calculated based on the heat work and the heat dissipation work.

[0010] When the total heat of the clutch exceeds a preset first temperature threshold, a preset clutch protection strategy is executed to control the clutch disengagement.

[0011] The beneficial effects are:

[0012] In the technical solution provided in the embodiments of this application, by dividing the clutch engagement cycle of the tractor into heat stages based on a preset KP point, the real-time heat work generated by the clutch in the heat stage within the engagement cycle is calculated, and the total heat of the clutch is obtained by combining the heat dissipation work of the clutch. This avoids the error caused by direct detection and improves the accuracy of the total clutch heat. After obtaining the total clutch heat, when the total clutch heat exceeds a preset first temperature threshold, a preset clutch protection strategy is executed. By timely controlling the clutch disengagement, the heat is reduced, which can effectively reduce the phenomenon of clutch overheating and burning.

[0013] Secondly, the present invention provides a wet clutch and a protection method for the wet clutch.

[0014] Thirdly, the present invention provides a protection device for a wet clutch, comprising a calculation unit, a total heat unit, and a protection unit;

[0015] The calculation unit is used to divide the clutch into heat stages based on a preset KP point within the clutch engagement cycle of the tractor, and calculate the heat work generated by the clutch corresponding to the heat stage.

[0016] The calculation unit is also used to obtain the heat dissipation information of the clutch and calculate the heat dissipation power of the clutch based on the heat dissipation information.

[0017] The total heat unit is used to calculate the total heat of the clutch based on the heat work and the heat dissipation work.

[0018] The protection unit is used to execute a preset clutch protection strategy and control the clutch to disengage when the total heat of the clutch exceeds a preset first temperature threshold.

[0019] Fourthly, this application also provides an electronic device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the aforementioned wet clutch protection method.

[0020] Fifthly, this application also provides a computer-readable storage medium storing computer-readable instructions thereon, which, when executed by a computer's processor, cause the computer to perform the wet clutch protection method as described above.

[0021] Sixthly, this application also provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the wet clutch protection method provided in the various alternative embodiments described above.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0024] Figure 1 This is a flowchart illustrating a protection method for a wet clutch, as shown in an exemplary embodiment of this application;

[0025] Figure 2 yes Figure 1 A flowchart of step S101 in the illustrated embodiment in an exemplary embodiment;

[0026] Figure 3 This is a schematic diagram showing the relationship between the friction plate torque value and time within a cycle;

[0027] Figure 4 This is a diagram showing the signal acquisition layout for the clutch.

[0028] Figure 5 yes Figure 1 A flowchart of step S102 in an exemplary embodiment shown in the illustrated example;

[0029] Figure 6 yes Figure 1 A flowchart of the steps following step S104 in the illustrated embodiment is provided in an exemplary embodiment.

[0030] Figure 7 This is a flowchart illustrating the preset clutch protection strategy;

[0031] Figure 8 This is a schematic flowchart of a protection method for a wet clutch in an exemplary embodiment of this application;

[0032] Figure 9This is a block diagram illustrating a protection device for a wet clutch, as shown in an exemplary embodiment of this application.

[0033] Figure 10 This is a schematic diagram of the structure of a computer system suitable for implementing the electronic devices of the present application embodiments. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0036] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0037] In this application, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0038] To address the above-mentioned problems, embodiments of this application propose a protection method and device for wet clutches, electronic devices, and computer-readable storage media. These mainly relate to protection strategies for wet clutches included in wet clutch technology, and these embodiments will be described in detail below.

[0039] Please refer to the following first. Figure 1 , Figure 1This is a flowchart illustrating a wet clutch protection method according to an exemplary embodiment of this application. The method can be specifically executed by a server, which can be an independent server or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDNs), and big data and artificial intelligence platforms. No limitation is imposed here.

[0040] like Figure 1 As shown, in an exemplary embodiment, the protection method for the wet clutch may include steps S101 to S104, which are described in detail below:

[0041] Step S101: During the clutch engagement cycle of the tractor, the heat stage is divided based on the preset KP point, and the heat work generated by the clutch corresponding to the heat stage is calculated.

[0042] Step S102: Obtain the heat dissipation information of the clutch, and calculate the heat dissipation power of the clutch based on the heat dissipation information.

[0043] Step S103: Calculate the total heat of the clutch based on the heat work and heat dissipation work.

[0044] In this embodiment, the preset KP point refers to the piston thrust (or pressure) required when the clutch overcomes the force of the release spring and begins to press the friction plates and steel plates together. This is often used to represent the torque transmission point of 0 Nm or 2 Nm. Therefore, within the clutch engagement cycle, the components and principles that generate heat in the clutch differ before and after the preset KP point. Thus, this embodiment divides the engagement cycle into heat stages based on the preset KP point and calculates the heat generated by the clutch corresponding to each heat stage.

[0045] In this embodiment, the clutch generates heat while simultaneously dissipating it. Therefore, to obtain the total heat of the clutch, the heat dissipation information of the clutch is acquired, and the heat dissipation work of the clutch is calculated based on the heat dissipation information. Thus, the total heat of the clutch is calculated based on the heat dissipation work and the heat generation work.

[0046] Step S104: When the total heat of the clutch exceeds a preset first temperature threshold, a preset clutch protection strategy is executed to control clutch disengagement.

[0047] In this embodiment, the preset clutch protection strategy includes a clutch disengagement strategy. By combining the relationship between the total heat of the clutch and the preset first temperature threshold in real time during the cycle, the clutch disengagement strategy is executed when the total heat of the clutch is greater than the preset first temperature threshold, thereby controlling the clutch to disengage.

[0048] As can be seen from the above, in the method provided in this embodiment, by dividing the heat stage based on the preset KP point within the clutch engagement cycle of the tractor, the real-time heat work generated by the clutch in the heat stage within the engagement cycle is calculated, and the total heat of the clutch is obtained by combining the heat dissipation work of the clutch. This avoids the error caused by direct detection and improves the accuracy of the total clutch heat. After obtaining the total clutch heat, when the total clutch heat is greater than the preset first temperature threshold, the preset clutch protection strategy is executed. By controlling the clutch disengagement in time, the heat is reduced, which can effectively reduce the phenomenon of clutch overheating and burning.

[0049] In an exemplary embodiment provided in this application, the heat stage includes a first stage and a second stage. The first stage is the time period before the time point corresponding to the preset KP point, and the second stage is the time period after the time point corresponding to the preset KP point. Please refer to [link / reference]. Figure 2 , Figure 2 yes Figure 1 The flowchart of step S101 in the illustrated embodiment is shown in an exemplary embodiment. Figure 2 As shown, step S101 may specifically include steps S201 to S204, through which the heat work generated by the clutch is obtained, as detailed below:

[0050] Step S201: Within the engagement cycle of the tractor's clutch, the engagement cycle is divided based on a preset KP point to obtain the first stage and the second stage.

[0051] In this embodiment, within the clutch engagement cycle of the tractor, the engagement cycle is divided based on a preset KP point to obtain a first stage and a second stage. For example... Figure 3 As shown, Figure 3 This is a schematic diagram showing the relationship between the friction plate torque value and time within a given period. In the diagram, considering the time period from T0 to T2, the torque point corresponding to the start time T1 of KP is taken as the preset KP point in this application. Therefore, the time period corresponding to the first stage is from T0 to T1, and the time period corresponding to the second stage is from T1 to T2.

[0052] Step S202: Calculate the first heat corresponding to the first stage using a preset first calculation formula.

[0053] In the first stage, the clutch is not fully engaged and is in a continuous pressing process. In this embodiment, a first calculation formula is configured to calculate the first heat corresponding to the first stage.

[0054] In another exemplary embodiment provided in this application, the engine input speed and friction information required for the first calculation formula are obtained to obtain the first heat. The specific steps for calculating the first heat may include:

[0055] The engine input speed of the tractor and the friction information of the clutch are acquired in real time. The friction information includes the outer radius of the friction plate, the inner radius of the friction plate, the density of the oil, the viscosity of the oil, the number of friction surfaces, and the gap between the clutch steel plate and the friction plate before the KP point.

[0056] Based on the engine input speed and friction information, the first heat corresponding to the first stage is calculated using a preset first calculation formula, as follows:

[0057]

[0058] Where P1 represents the first heat, ne(t) represents the engine input speed, R0 represents the outer radius of the friction plate (in meters), R1 represents the inner radius of the friction plate (in meters), and ρ represents the density of the oil (in kg / m³). -3 Z represents the number of friction surfaces, and ν represents the viscosity of the oil, both in m³. 2 / s, δ(t) represents the gap between the clutch steel plate and the friction plate before point KP, in mm. The gap between the clutch steel plate and the friction plate before point KP can be obtained from the displacement curve of the return disc spring inside the clutch.

[0059] Step S203: Calculate the second heat corresponding to the second stage using the preset second calculation formula.

[0060] In the second stage, the clutch is fully engaged. In this embodiment, a second calculation formula is configured to calculate the second heat corresponding to the second stage.

[0061] In another exemplary embodiment provided in this application, sensor information on engine torque, engine input speed, and clutch required for the second calculation formula is obtained to obtain the second heat. The specific steps for calculating the second heat may include:

[0062] The sensor information of the tractor's engine input speed and clutch is acquired in real time. The sensor information includes the measured speed at the clutch output end and the dynamic pressure in the clutch piston chamber.

[0063] Based on the engine input speed and clutch sensor information, the second heat corresponding to the second stage is calculated using a preset second calculation formula, as follows:

[0064]

[0065] Wherein, P2 represents the first heat, T(t) represents the friction plate torque value, n(t) represents the measured rotational speed, Pa(t) represents the dynamic pressure, Pk represents the pressure at the preset KP point, in MPa, μ represents the friction coefficient, and A represents the piston area, in mm.

[0066] Additionally, please see Figure 4 , Figure 4 This is a diagram showing the signal acquisition layout for the clutch. (For example...) Figure 4 As shown, the measured speed n(t) is obtained by using a speed sensor installed at the clutch output end, the dynamic pressure Pa(t) is obtained by using a dynamic pressure sensor in the clutch piston chamber, and the engine input speed ne(t) and engine torque Te(t) are obtained from the engine connected to the clutch.

[0067] Step S204: Add the first heat and the second heat to obtain the heat work generated by the clutch.

[0068] Therefore, through the method of the above embodiments, this application divides the heat stages based on a preset KP point within the clutch engagement cycle of the tractor, and calculates the first heat and the second heat generated before and after the preset KP point using corresponding calculation formulas, thereby obtaining the sum of the first heat and the second heat as heat work. In this way, by obtaining the first heat and the second heat through the first calculation formula and the second calculation formula adapted to different stages, the accuracy of the heat calculation results is improved, thereby avoiding the error caused by direct detection and improving the accuracy of the total clutch heat.

[0069] Please see Figure 5 , Figure 5 yes Figure 1 The flowchart of step S102 in the illustrated embodiment is shown in an exemplary embodiment. Figure 5 As shown, step S102 may specifically include steps S501 to S502, through which the cooling power of the clutch is calculated, as detailed below:

[0070] Step S501: Obtain the heat dissipation information of the clutch, which includes the weight and specific heat capacity of the friction plates and steel plate assembly with heat dissipation function.

[0071] Step S502: Calculate the heat dissipation work of the clutch based on its weight and specific heat capacity.

[0072] The formula for calculating heat dissipation work is as follows: Wherein, Ps represents the heat dissipation work, M represents the weight value, and C represents the specific heat capacity.

[0073] This embodiment obtains the heat dissipation work during the engagement cycle based on the basic information of the friction plates and steel plate assembly, and uses the engagement heat work to obtain the total heat of the clutch, further improving the accuracy of the total clutch heat.

[0074] Please see Figure 6 , Figure 6 yes Figure 1 The steps following step S104 in the illustrated embodiment are shown in a flowchart of an exemplary embodiment. (See flowchart for example.) Figure 6As shown, it may include steps S601 to S602, through which the text contained in the text image is obtained, as detailed below:

[0075] Step S601: Real-time detection of total heat after clutch disengagement.

[0076] Step S602: Obtain the relationship between the total heat after separation and the second temperature threshold. When the total heat after separation is less than or equal to the second temperature threshold and the duration of the period of the period of the total heat after separation is less than or equal to the second temperature threshold reaches a time threshold, control the clutch to engage.

[0077] In this embodiment, the preset clutch protection strategy also includes a clutch engagement strategy. After the clutch disengagement strategy in the protection strategy is executed, the total heat of the clutch will gradually decrease, so the clutch engagement strategy is implemented to re-engage the clutch.

[0078] In the clutch engagement strategy, the total heat after clutch disengagement is detected in real time, and the relationship between the total heat after disengagement and the second temperature threshold is monitored. When the total heat after disengagement is less than or equal to the second temperature threshold and the duration of the period ...

[0079] like Figure 7 As shown, Figure 7 This is a flowchart illustrating the preset clutch protection strategy. When the total clutch heat exceeds the first temperature threshold, it indicates that the heat generated by the slippage of the wet clutch has exceeded its tolerance limit. At this point, the clutch disengagement strategy is triggered to disengage the clutch and prevent further accumulation of frictional heat, thereby protecting the clutch. After triggering clutch protection and disengaging the clutch, if the total clutch heat gradually decreases below the second temperature threshold and remains there for a period of time t1, it means that the heat generated by the friction of the wet clutch is lower than the heat carried away by lubrication and heat dissipation, and the clutch temperature has cooled to within the normal range. At this point, re-engaging the clutch is permitted.

[0080] As can be seen from the above, in the method provided in this embodiment, after the clutch disengagement strategy in the protection strategy is executed, when the total heat after disengagement is detected to be less than or equal to the second temperature threshold and the duration of the time when the disengagement is less than or equal to the second temperature threshold reaches a time threshold, the clutch is controlled to engage, thereby ensuring the performance of the clutch and avoiding prolonged clutch disengagement, which would affect the use of the tractor.

[0081] Please see Figure 8 , Figure 8 This is a schematic flowchart of a protection method for a wet clutch in an exemplary embodiment of this application, which may include the following steps:

[0082] Step S801: Calculate the total heat of the clutch based on the heat work and heat dissipation work.

[0083] Step S802: Determine whether the total heat of the clutch is greater than the first temperature threshold. If yes, proceed to S803; otherwise, proceed to S801.

[0084] Step S803: Execute the preset clutch protection strategy to control clutch disengagement;

[0085] Step S804: Real-time detection of total heat after clutch disengagement;

[0086] Step S805: Determine whether the total heat after separation is less than or equal to the second temperature threshold and the duration reaches the time threshold. If yes, proceed to S806; otherwise, proceed to S801.

[0087] Step S806: Control the clutch to engage and return to step S801.

[0088] In an exemplary embodiment of this application, Figures 1 to 8 The wet clutch protection method of the illustrated embodiment is applied to a tractor. When the wet clutch protection method provided in this application is implemented on the tractor, various data are obtained from the wet clutch and the connected engine to calculate the total heat of the wet clutch. When the total heat of the clutch exceeds a preset first temperature threshold, a preset clutch protection strategy is executed to control clutch disengagement. By controlling clutch disengagement in a timely manner, the heat is reduced, which can effectively reduce the phenomenon of clutch overheating and burning, and improve the overall performance of the tractor.

[0089] Figure 9 This is a block diagram illustrating a protective device 900 for a wet clutch, as shown in an exemplary embodiment of this application. Figure 9 As shown, the device includes:

[0090] The calculation unit 901 is used to divide the heat stages based on the preset KP point within the clutch engagement cycle of the tractor, and calculate the heat work generated by the clutch in the corresponding heat stage.

[0091] The calculation unit 901 is also used to obtain the heat dissipation information of the clutch and calculate the heat dissipation work of the clutch based on the heat dissipation information.

[0092] Total heat unit 902 is used to calculate the total heat of the clutch based on heat work and heat dissipation work;

[0093] The protection unit 903 is used to execute a preset clutch protection strategy and control clutch disengagement when the total heat of the clutch exceeds a preset first temperature threshold.

[0094] This device applies the wet clutch protection method provided in this application. The calculation unit 901 divides the clutch engagement cycle of the tractor into heat stages based on a preset KP point, and calculates the real-time heat work generated by the clutch in the heat stage within the engagement cycle. The total heat unit 902 combines the heat dissipation work of the clutch to obtain the total clutch heat. This avoids the error caused by direct detection and improves the accuracy of the total clutch heat. After obtaining the total clutch heat, the protection unit 903 executes the preset clutch protection strategy when the total clutch heat exceeds a preset first temperature threshold. By controlling the clutch disengagement in time, the heat is reduced, which can effectively reduce the phenomenon of clutch overheating and burning.

[0095] In another exemplary embodiment, the heat stage includes a first stage and a second stage. The first stage is the time period before the time point corresponding to the preset KP point, and the second stage is the time period after the time point corresponding to the preset KP point. The calculation unit 901 is further configured to divide the engagement cycle of the tractor's clutch based on the preset KP point to obtain the first stage and the second stage; calculate the first heat corresponding to the first stage using a preset first calculation formula; calculate the second heat corresponding to the second stage using a preset second calculation formula; and add the first heat and the second heat to obtain the heat work generated by the clutch.

[0096] In another exemplary embodiment, the calculation unit 901 is further configured to acquire the engine input speed of the tractor and the friction information of the clutch in real time. The friction information includes the outer radius of the friction plate, the inner radius of the friction plate, the density of the oil, the viscosity of the oil, the number of friction surfaces, and the gap between the clutch steel plate and the friction plate before the KP point. Based on the engine input speed and the friction information, the first heat corresponding to the first stage is calculated using a preset first calculation formula, as follows:

[0097]

[0098] Where P1 represents the first heat, ne(t) represents the engine input speed, R0 represents the outer radius of the friction plate (in meters), R1 represents the inner radius of the friction plate (in meters), and ρ represents the density of the oil (in kg / m³). -3 Z represents the number of friction surfaces, and ν represents the viscosity of the oil, both in m³. 2 / s, δ(t) represents the gap between the clutch steel plate and the friction plate before point KP, in mm.

[0099] In another exemplary embodiment, the calculation unit 901 is further configured to acquire in real time the engine input speed of the tractor and the sensor information of the clutch, the sensor information including the measured speed at the clutch output end and the dynamic pressure of the clutch piston chamber; based on the engine input speed and the clutch sensor information, the second heat corresponding to the second stage is calculated using a preset second calculation formula, the calculation formula being as follows:

[0100] Wherein, P2 represents the first heat, n(t) represents the measured rotational speed, Pa(t) represents the dynamic pressure, Pk represents the pressure at the preset KP point (in MPa), μ represents the coefficient of friction, and A represents the piston area (in mm).

[0101] In another exemplary embodiment, the calculation unit 901 is further configured to acquire heat dissipation information of the clutch, including the weight and specific heat capacity of the friction plates and steel plate assembly with heat dissipation function; and to calculate the heat dissipation work of the clutch based on the weight and specific heat capacity, using the following formula: Wherein, Ps represents the heat dissipation work, M represents the weight value, and C represents the specific heat capacity.

[0102] In another exemplary embodiment, the protection unit 903 is also used to detect the total heat after the clutch is disengaged in real time; obtain the relationship between the total heat after disengagement and the second temperature threshold; and control the clutch to engage when the total heat after disengagement is less than or equal to the second temperature threshold and the duration of the period of the period of the total heat after disengagement being less than or equal to the second temperature threshold reaches a time threshold.

[0103] It should be noted that the wet clutch protection device and the wet clutch protection method provided in the above embodiments belong to the same concept. The specific operation methods of each module and unit have been described in detail in the method embodiments and will not be repeated here. In practical applications, the wet clutch protection device provided in the above embodiments can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0104] Embodiments of this application also provide an electronic device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by one or more processors, cause the electronic device to implement the wet clutch protection method provided in the above embodiments.

[0105] Figure 10 A schematic diagram of a computer system suitable for implementing the embodiments of this application is shown. It should be noted that... Figure 10The computer system 1000 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0106] like Figure 10 As shown, the computer system 1000 includes a Central Processing Unit (CPU) 1001, which can perform various appropriate actions and processes, such as executing the methods described in the above embodiments, based on programs stored in Read-Only Memory (ROM) 1002 or programs loaded from Storage Unit 1008 into Random Access Memory (RAM) 1003. The RAM 1003 also stores various programs and data required for system operation. The CPU 1001, ROM 1002, and RAM 1003 are interconnected via a bus 1004. An Input / Output (I / O) interface 1005 is also connected to the bus 1004.

[0107] The following components are connected to I / O interface 1005: an input section 1006 including a keyboard, mouse, etc.; an output section 1007 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1008 including a hard disk, etc.; and a communication section 1009 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 1009 performs communication processing via a network such as the Internet. A drive 1010 is also connected to I / O interface 1005 as needed. Removable media 1011, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1010 as needed so that computer programs read from them can be installed into storage section 1008 as needed.

[0108] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 1009, and / or installed from removable medium 1011. When the computer program is executed by central processing unit (CPU) 1001, it performs various functions defined in the system of this application.

[0109] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0110] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0111] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0112] Another aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the aforementioned wet clutch protection method. This computer-readable storage medium may be included in the electronic device described in the above embodiments, or it may exist independently without being assembled into that electronic device.

[0113] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the wet clutch protection method provided in the various embodiments described above.

[0114] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A protection method for a wet clutch, characterized in that, The method includes: Within the clutch engagement cycle of the tractor, the heat stages are divided based on the preset KP point, and the heat work generated by the clutch corresponding to the heat stage is calculated. The preset KP point is the piston pressure point corresponding to when the clutch overcomes the force of the release spring and begins to press the friction plate and steel plate together, which represents the torque transmission point of 0 Nm or 2 Nm. Obtain the heat dissipation information of the clutch, and calculate the heat dissipation power of the clutch based on the heat dissipation information; The total heat of the clutch is calculated based on the heat work and the heat dissipation work. When the total heat of the clutch exceeds a preset first temperature threshold, a preset clutch protection strategy is executed to control the clutch to disengage. The heat phase includes a first phase and a second phase. The first phase is the time period before the time point corresponding to the preset KP point, and the second phase is the time period after the time point corresponding to the preset KP point. The calculation of the heat work generated by the clutch during the clutch engagement cycle of the tractor, based on a preset KP point to divide the heat stages, includes: Within the clutch engagement cycle of the tractor, the engagement cycle is divided based on the preset KP point to obtain the first stage and the second stage. The first heat corresponding to the first stage is calculated using a preset first calculation formula; The second heat corresponding to the second stage is calculated using a preset second calculation formula; Adding the first heat and the second heat, we obtain the heat work generated by the clutch; The calculation of the first heat corresponding to the first stage using a preset first calculation formula includes: The engine input speed of the tractor and the friction information of the clutch are acquired in real time. The friction information includes the outer radius of the friction plate, the inner radius of the friction plate, the density of the oil, the viscosity of the oil, the number of friction surfaces, and the gap between the clutch steel plate and the friction plate before the KP point. Based on the engine input speed and the friction information, the first heat corresponding to the first stage is calculated using a preset first calculation formula, as follows: ； in, The first heat is represented by ne(t), the engine input speed is represented by ne(t), R0 is represented by the outer radius of the friction plate (in meters), and R1 is represented by the inner radius of the friction plate (in meters). The density of oil is represented by units of... Z represents the number of friction surfaces, and ν represents the viscosity of the oil, with units of 1000 ppm. δ(t) represents the gap between the clutch steel plate and the friction plate before point KP, in mm.

2. The method according to claim 1, characterized in that, The calculation of the second heat corresponding to the second stage using a preset second calculation formula includes: The sensor information of the tractor's engine input speed and clutch is acquired in real time, including the measured speed at the clutch output end and the dynamic pressure in the clutch piston chamber. Based on the engine input speed and the clutch sensor information, the second heat corresponding to the second stage is calculated using a preset second calculation formula, as follows: ， ； in, The second heat is represented by n(t), the measuring rotational speed is represented by n(t), and the dynamic pressure is represented by Pa(t). The pressure at the preset KP point is represented in MPa, µ represents the coefficient of friction, A represents the piston area in mm, and t1 and t2 represent the two time endpoints corresponding to the second stage.

3. The method according to claim 1, characterized in that, The step of obtaining the heat dissipation information of the clutch and calculating the heat dissipation work of the clutch based on the heat dissipation information includes: Obtain the heat dissipation information of the clutch, which includes the weight and specific heat capacity of the friction plates and steel plate assembly with heat dissipation function; The heat dissipation work of the clutch is calculated based on the weight value and the specific heat capacity, using the following formula: Ps = ; where, is represented by the heat dissipation work described in Ps, Characterized by the weight value, This is characterized by the specific heat capacity.

4. The method according to any one of claims 1, characterized in that, After executing the preset clutch protection strategy and controlling the clutch disengagement, the method further includes: Real-time monitoring of the total heat generated after the clutch disengages; The relationship between the total heat after separation and the second temperature threshold is obtained. When the total heat after separation is less than or equal to the second temperature threshold and the duration of the period ...

5. A tractor, comprising a wet clutch, characterized in that, The protection method for the wet clutch according to any one of claims 1 to 4.

6. A protection device for a wet clutch, characterized in that, include: The calculation unit is used to divide the heat stages based on a preset KP point within the clutch engagement cycle of the tractor, and calculate the heat work generated by the clutch corresponding to the heat stage. The preset KP point is the piston pressure point corresponding to when the clutch overcomes the force of the release spring and begins to press the friction plate and steel plate together, which represents the torque transmission point of 0 Nm or 2 Nm. The calculation unit is also used to obtain the heat dissipation information of the clutch and calculate the heat dissipation power of the clutch based on the heat dissipation information. The total heat unit is used to calculate the total heat of the clutch based on the heat work and the heat dissipation work. The protection unit is used to execute a preset clutch protection strategy and control the clutch to disengage when the total heat of the clutch exceeds a preset first temperature threshold. The heat phase includes a first phase and a second phase. The first phase is the time period before the time point corresponding to the preset KP point, and the second phase is the time period after the time point corresponding to the preset KP point. The calculation of the heat work generated by the clutch during the clutch engagement cycle of the tractor, based on a preset KP point to divide the heat stages, includes: Within the clutch engagement cycle of the tractor, the engagement cycle is divided based on the preset KP point to obtain the first stage and the second stage. The first heat corresponding to the first stage is calculated using a preset first calculation formula; The second heat corresponding to the second stage is calculated using a preset second calculation formula; Adding the first heat and the second heat, we obtain the heat work generated by the clutch; The calculation of the first heat corresponding to the first stage using a preset first calculation formula includes: The engine input speed of the tractor and the friction information of the clutch are acquired in real time. The friction information includes the outer radius of the friction plate, the inner radius of the friction plate, the density of the oil, the viscosity of the oil, the number of friction surfaces, and the gap between the clutch steel plate and the friction plate before the KP point. Based on the engine input speed and the friction information, the first heat corresponding to the first stage is calculated using a preset first calculation formula, as follows: ； in, The first heat is represented by ne(t), the engine input speed is represented by ne(t), R0 is represented by the outer radius of the friction plate (in meters), and R1 is represented by the inner radius of the friction plate (in meters). The density of oil is represented by units of... Z represents the number of friction surfaces, and ν represents the viscosity of the oil, with units of 1000 ppm. δ(t) represents the gap between the clutch steel plate and the friction plate before point KP, in mm.

7. An electronic device, characterized in that, include: One or more processors; A storage device for storing one or more programs that, when executed by one or more processors, cause the electronic device to implement the protection method for the wet clutch as described in any one of claims 1 to 4.

8. A computer-readable storage medium, characterized in that, It stores computer-readable instructions that, when executed by the computer's processor, cause the computer to perform the protection method for the wet clutch as described in any one of claims 1 to 4.

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