A real-time calculation method and system for clutch temperature of a commercial vehicle and the commercial vehicle

Abstract

This invention provides a method, system, and commercial vehicle for real-time calculation of clutch temperature in commercial vehicles, relating to the field of intelligent commercial vehicle clutches. After the vehicle is powered on, the chassis controller obtains the last shutdown time t0 and the current power-on time t1; it then determines whether the time interval (t1-t0) is greater than a preset time interval t. s If it is greater than t, the chassis controller obtains the initial clutch temperature t. f0 ; Calculate the slippage work of the clutch during starting or shifting; Calculate the temperature rise T caused by clutch slippage. a It can monitor the clutch temperature and the ambient temperature inside the chamber in real time after each power-on, and can be used for a clutch alarm system with real-time feedback, which is more intuitive and timely than clutch wear alarm methods.

Description

Technical Field

[0001] This invention relates to the field of intelligent clutches for commercial vehicles, and more particularly to a method, system, and commercial vehicle for real-time calculation of clutch temperature. Background Technology

[0002] Commercial vehicles are automobiles designed and technically characterized for transporting people and goods. Commercial vehicles include all freight vehicles and buses with more than nine seats, and are divided into five categories: buses, trucks, semi-trailer tractors, incomplete bus vehicles, and incomplete truck vehicles. In the industry media, the concept of commercial vehicles is primarily defined based on their intended use, conventionally dividing them into two main categories: buses and trucks.

[0003] It can be seen that commercial vehicles can be used to carry goods as well as passengers. Because commercial vehicles have a larger load capacity than passenger vehicles, they need to have more stable driving safety. Among these components, the clutch is a crucial factor affecting the stable operation of commercial vehicles.

[0004] Currently, the operating conditions and usage of clutches are becoming increasingly harsh, leading to a rise in early wear and burning issues among after-sales malfunctions. This is due to factors such as starting in high gears, prolonged starting times, or continuous starting in congested traffic, resulting in high starting energy and excessive clutch slippage, causing overheating and burning of the friction plates.

[0005] Existing clutch wear alarm methods rely on displacement sensors mounted on the clutch booster to read the wear level of the friction plates. While this method can remind users to replace the friction plates when they are nearing the end of their service life, it cannot detect overheating of the clutch leading to burning, thus compromising the safety of commercial vehicles. Summary of the Invention

[0006] This invention provides a real-time calculation method for the clutch temperature of commercial vehicles. The method can obtain the real-time temperature of the clutch heat dissipation and the real-time temperature of the internal environment, and provide real-time feedback on the burning phenomenon caused by excessive clutch temperature, so as to ensure the safe operation of commercial vehicles.

[0007] The methods include:

[0008] S1. After the vehicle is powered on, the chassis controller obtains the last shutdown time t0 and the current power-on time t1.

[0009] S2. Determine whether the time interval (t1-t0) is greater than the preset time interval t. s ;

[0010] S3, if greater than, then the chassis controller obtains the initial clutch temperature t. f0 ;

[0011] S4. Calculate the slippage work of the starting or shifting clutch;

[0012] S5. Calculate the temperature rise T caused by clutch slippage. a ;

[0013] S6. Based on the convective heat transfer model between the clutch and the internal environment, calculate the real-time temperature of the clutch and the real-time temperature of the internal environment.

[0014] It should be further explained that step S6 specifically includes:

[0015] S601. Establish a convective heat transfer temperature model for the clutch and flywheel housing and the internal cavity environment of the clutch housing.

[0016] S602. Based on the convection heat transfer model, the method for calculating the temperature over time during clutch convection heat transfer is as follows:

[0017]

[0018] in, N=hT a ;

[0019] h is the heat transfer coefficient, c w For the specific heat capacity of the clutch and flywheel materials, c f For the specific heat capacity of the air inside the cavity, m w For the mass of the clutch and flywheel, m f Let A be the mass of the air inside the cavity, and A be the area of ​​the pressure plate surface, which is the heat transfer area.

[0020] The method for calculating the temperature of the internal environment of the cavity over time is as follows:

[0021]

[0022] S603. Calculate the real-time temperature of the clutch during convective heat transfer and the real-time temperature of the cavity environment according to the calculation method in step S602.

[0023] It should be further noted that in step S4, the slippage work L of the starting or shifting clutch is calculated. C for:

[0024] L C =θT C

[0025] Where θ is the slip angle and Tc is the clutch friction torque.

[0026] It should be further noted that the method for calculating the temperature rise Ta caused by clutch slippage in step S5 is as follows:

[0027]

[0028] Where γ is the heat transfer ratio, η is the heat absorption efficiency, m is the mass of the pressure plate and flywheel, and c p This refers to the specific heat capacity of the clutch and flywheel materials.

[0029] It should be further noted that, in the method, if the time interval (t1-t0) is not greater than the preset time interval t... s ;

[0030] The preset value is then retrieved based on the time interval (t1-t0) as the initial clutch temperature T. f0 .

[0031] The present invention also provides a real-time calculation system for the clutch temperature of a commercial vehicle, the system comprising: a timing module, a time judgment module, a chassis controller, a slippage work calculation module, a temperature rise calculation module, and a temperature calculation module;

[0032] The timing module is used to obtain the last time the engine was turned off (t0) and the current time the engine was turned on (t1) after the vehicle is powered on.

[0033] The chassis controller is used to determine whether the time interval (t1-t0) is greater than the preset time interval t. s If it is greater than t, the chassis controller obtains the initial clutch temperature t. f0 ;

[0034] If it is not greater than, then a preset value is retrieved based on the time interval (t1-t0) as the initial clutch temperature T. f0 ;

[0035] The slippage work calculation module is used to calculate the slippage work of the clutch during starting or shifting.

[0036] The temperature rise calculation module is used to calculate the temperature rise T caused by clutch slippage. a ;

[0037] The temperature calculation module is based on the convective heat transfer model between the clutch and the internal environment of the cavity, and calculates the real-time temperature of the clutch and the real-time temperature of the internal environment.

[0038] It should be further noted that the system also includes: a vehicle controller and a data display module;

[0039] The display prompt module is used to display the real-time clutch heat dissipation temperature and the real-time temperature of the internal environment calculated by the temperature calculation module.

[0040] The vehicle controller is used to determine the real-time temperature of the clutch cooling system and the real-time temperature of the internal environment. When the temperature exceeds the corresponding preset threshold, an alarm is issued through the display module to alert the driver.

[0041] It should be further noted that the vehicle controller is also used to obtain the fluctuation range of the real-time temperature of the clutch cooling system and the fluctuation range of the real-time temperature of the internal environment within a preset time period, and to determine whether the fluctuation is abnormal.

[0042] It should be further noted that the temperature calculation module includes: a model building unit, a clutch temperature calculation unit, and a cavity temperature calculation unit.

[0043] The model building unit is used to build a convective heat transfer temperature model of the clutch and flywheel housing and the internal cavity environment of the clutch housing.

[0044] The cavity temperature calculation unit is used to calculate the internal ambient temperature of the cavity as follows:

[0045]

[0046] The clutch temperature calculation unit is based on the convection heat transfer model. It calculates the temperature over time during clutch convection heat transfer using the following formula, and obtains the real-time temperature of the clutch during convection heat transfer and the real-time temperature of the cavity environment.

[0047]

[0048] in, N = hT a ;

[0049] h is the heat transfer coefficient, c w For the specific heat capacity of the clutch and flywheel materials, c f For the specific heat capacity of the air inside the cavity, m w For the mass of the clutch and flywheel, m f Let A be the mass of the air inside the cavity, and let A be the area of ​​the pressure plate surface, which is the heat transfer area.

[0050] The present invention also provides a commercial vehicle, comprising: a time acquisition module, a time judgment module, a chassis controller, a slip friction work calculation module, a temperature rise calculation module, and a temperature calculation module in a real-time calculation system for the clutch temperature of a commercial vehicle; to realize the steps of a real-time calculation method for the clutch temperature of a commercial vehicle.

[0051] As can be seen from the above technical solutions, the present invention has the following advantages:

[0052] This invention relates to a real-time temperature calculation method based on a clutch and flywheel housing, and a convective heat transfer model of the internal environment of the clutch housing cavity. The method includes the chassis controller reading the outdoor sensor temperature after each power-on, selecting the initial clutch temperature, and calculating the clutch slippage work, clutch temperature rise, and real-time temperature of the convective heat transfer between the clutch and the internal environment. This invention is primarily used for monitoring clutch temperature and can be applied to clutch temperature alarm systems, offering greater intuitiveness and timeliness compared to clutch wear alarm methods. It can also prevent excessive temperature from causing wear and burning of the clutch friction plates, thereby improving clutch lifespan. Attached Figure Description

[0053] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 Flowchart of a method for real-time calculation of clutch temperature in commercial vehicles;

[0055] Figure 2 This is a flowchart illustrating an embodiment of a method for real-time calculation of clutch temperature in commercial vehicles.

[0056] Figure 3 This is a schematic diagram of the calculated clutch and cavity ambient temperature curves of the present invention;

[0057] Figure 4 This is a schematic diagram of the clutch and flywheel housing and the clutch housing cavity of the present invention. Detailed Implementation

[0058] like Figure 1 and Figure 2 The illustrations provided in this invention, which are part of a method for real-time calculation of the clutch temperature of a commercial vehicle, are only intended to illustrate the basic concept of the invention. Therefore, the illustrations only show the modules relevant to the invention and not the actual number and function of the modules in actual implementation. In actual implementation, the function, quantity, and role of each module can be arbitrarily changed, and the function and purpose of the modules may also be more complex.

[0059] A real-time calculation method for the clutch temperature of commercial vehicles can be based on artificial intelligence technology to acquire and process related data. Specifically, this invention utilizes a digital computer or a machine controlled by a digital computer to simulate, extend, and expand human intelligence, perceiving the environment, acquiring knowledge, and using that knowledge to obtain optimal results. This provides theories, methods, technologies, and application devices for achieving autonomous driving, automatic data judgment, and automatic adjustment of operation in commercial vehicles to meet driving requirements.

[0060] The real-time calculation method for commercial vehicle clutch temperature involves both hardware and software technologies. The fundamental technologies of intelligent diagnostic methods for CNC machine tools generally include sensors, dedicated AI chips, cloud computing, distributed storage, big data processing, operating / interactive systems, and mechatronics. The real-time calculation method for commercial vehicle clutch temperature also utilizes software technologies, primarily including computer vision technology, speech processing technology, natural language processing technology, and machine learning / deep learning.

[0061] The real-time calculation method for the clutch temperature of commercial vehicles also has machine learning capabilities. The machine learning and deep learning in the method of this invention typically include artificial neural networks, belief networks, reinforcement learning, transfer learning, inductive learning, and formulaic learning.

[0062] Real-time computing methods can be applied to commercial vehicles, which are capable of automatically performing numerical calculations and / or information processing according to pre-set or stored instructions. Commercial vehicles include, but are not limited to, onboard microprocessors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), and embedded devices.

[0063] The following will combine Figures 1 to 4 The present invention will elaborate on the real-time calculation method, which can be applied, for example, to the analysis of clutch temperature in commercial vehicles. It calculates and analyzes the real-time temperature change trend of clutch heat dissipation and the real-time temperature change trend of the internal environment, and can obtain the clutch status in real time. It can also provide real-time reminders of overheating of the clutch, which has a positive effect on reducing clutch erosion.

[0064] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] Please see Figures 1 to 4 The diagram shows a flowchart of a real-time calculation method for the clutch temperature of a commercial vehicle in a specific embodiment. The method includes:

[0066] S1. After the vehicle is powered on, the chassis controller obtains the last shutdown time t0 and the current power-on time t1.

[0067] The vehicle has a storage device that stores the time the vehicle was turned off and the time it was turned on each time. After the vehicle is powered on, the chassis controller can retrieve the corresponding time information from the storage device. The system can sort the time of engine shutdown and power-on in chronological order for easy retrieval and use.

[0068] S2. Determine whether the time interval (t1-t0) is greater than the preset time interval t. s ;

[0069] Here, the time interval can be calculated based on the vehicle controller, and it can be determined whether it exceeds a preset time period. The preset time period is set based on the commercial vehicle's status information or its actual needs. The specific time period is not limited here.

[0070] S3, if greater than, then the chassis controller obtains the initial clutch temperature t. f0 ;

[0071] If the time interval (t1-t0) is not greater than the preset time interval t s Then, the preset value is retrieved based on the time interval (t1-t0) as the initial clutch temperature T. f0 .

[0072] S4. Calculate the slippage work of the starting or shifting clutch;

[0073] In this invention, the slippage work L of the starting or shifting clutch is calculated. C for:

[0074] L C =θT C

[0075] Where θ is the slip angle and Tc is the clutch friction torque.

[0076] S5. Calculate the temperature rise T caused by clutch slippage. a ;

[0077] The method for calculating the temperature rise Ta caused by clutch slippage is as follows:

[0078]

[0079] Where γ is the heat transfer ratio, η is the heat absorption efficiency, m is the mass of the pressure plate and flywheel, and c p This refers to the specific heat capacity of the clutch and flywheel materials.

[0080] S6. Based on the convective heat transfer model between the clutch and the internal environment, calculate the real-time temperature of the clutch and the real-time temperature of the internal environment.

[0081] Specifically, S601, clutch and flywheel housing 2, clutch housing internal cavity as follows Figure 4As shown, the flywheel 4 is installed inside the flywheel housing 2. A flow heat transfer temperature model is established based on this structure. Specifically, during the convective heat transfer process between the clutch 3 and the internal cavity environment, the pressure plate assembly and driven plate assembly of the clutch 3 are assumed to be a uniformly heated whole, and the internal cavities of the flywheel housing 2 and the clutch housing 1 are sealed spaces that do not exchange heat with the outside.

[0082] S602, based on the convection heat transfer model, derives the method for calculating the temperature over time after clutch slippage temperature rise, specifically as follows:

[0083]

[0084] in N = hT a ;

[0085] h is the heat transfer coefficient, c w For the specific heat capacity of the clutch and flywheel materials, c f For the specific heat capacity of the air inside the cavity, m w For the mass of the clutch and flywheel, m f Let A be the mass of the air inside the cavity, and A be the area of ​​the pressure plate surface, which is the heat transfer area.

[0086] The method for calculating the temperature of the internal environment over time was derived, as follows:

[0087]

[0088] S603, based on the calculation method, the real-time temperature of the clutch, the real-time temperature of the cavity environment, the real-time temperature during the clutch heat dissipation stage, and the temperature curves of the cavity environment are calculated. The curve form is as follows: Figure 3 As shown.

[0089] The present invention relates to a real-time temperature calculation method based on a convective heat transfer model of the clutch and flywheel housing and the internal environment of the clutch housing cavity. This method monitors the clutch temperature and the internal environment temperature in real time after each power-on, and can be used in a real-time feedback clutch alarm system. It is more intuitive and timely than clutch wear alarm methods.

[0090] The following are embodiments of the real-time calculation system for commercial vehicle clutch temperature provided in this disclosure. This real-time calculation system for commercial vehicle clutch temperature belongs to the same inventive concept as the real-time calculation method for commercial vehicle clutch temperature in the above embodiments. For details not described in detail in the embodiments of the real-time calculation system for commercial vehicle clutch temperature, please refer to the embodiments of the real-time calculation method for commercial vehicle clutch temperature described above.

[0091] The system includes: a timing module, a time judgment module, a chassis controller, a skidding work calculation module, a temperature rise calculation module, and a temperature calculation module;

[0092] The timing module is used to obtain the last time the engine was turned off (t0) and the current time the engine was turned on (t1) after the vehicle is powered on.

[0093] The chassis controller is used to determine whether the time interval (t1-t0) is greater than the preset time interval t. s If it is greater than t, the chassis controller obtains the initial clutch temperature t. f0 ;

[0094] If it is not greater than, then a preset value is retrieved based on the time interval (t1-t0) as the initial clutch temperature T. f0 ;

[0095] The slippage work calculation module is used to calculate the slippage work of the clutch during starting or shifting.

[0096] The temperature rise calculation module is used to calculate the temperature rise T caused by clutch slippage. a ;

[0097] The temperature calculation module is based on the convective heat transfer model between the clutch and the internal environment of the cavity, and calculates the real-time temperature of the clutch and the real-time temperature of the internal environment.

[0098] In one exemplary embodiment, the temperature calculation module includes: a model building unit, a clutch temperature calculation unit, and a cavity temperature calculation unit.

[0099] The model building unit is used to build a convective heat transfer temperature model of the clutch and flywheel housing and the internal cavity environment of the clutch housing.

[0100] The cavity temperature calculation unit is used to calculate the internal ambient temperature of the cavity as follows:

[0101]

[0102] The clutch temperature calculation unit is based on the convection heat transfer model. It calculates the temperature over time during clutch convection heat transfer using the following formula, and obtains the real-time temperature of the clutch during convection heat transfer and the real-time temperature of the cavity environment.

[0103]

[0104] in, N = hT a ;

[0105] h is the heat transfer coefficient, c w For the specific heat capacity of the clutch and flywheel materials, c f For the specific heat capacity of the air inside the cavity, m w For the mass of the clutch and flywheel, m f Let A be the mass of the air inside the cavity, and let A be the area of ​​the pressure plate surface, which is the heat transfer area.

[0106] In one exemplary embodiment, the system further includes: a vehicle controller and a data display module;

[0107] The display module is used to display the real-time clutch cooling temperature and the real-time ambient temperature inside the clutch cavity, calculated by the temperature calculation module. The vehicle controller is used to judge the real-time clutch cooling temperature and the real-time ambient temperature inside the clutch cavity in real time. When the above temperatures exceed the corresponding preset thresholds, the display module will issue an alarm to alert the driver.

[0108] The vehicle controller is also used to learn the fluctuation range of the real-time temperature of the clutch cooling system and the fluctuation range of the real-time temperature of the internal environment within a preset time period, and to determine whether the fluctuation is abnormal.

[0109] The units and algorithm steps of the various examples described in the embodiments of the real-time calculation system and method for commercial vehicle clutch temperature of the present invention can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of function in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0110] The flowcharts and block diagrams in the accompanying drawings of the real-time computing system and method illustrate the architecture, functionality, and operation of possible implementations of the apparatus, method, and computer program product according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, segment, or portion of code containing 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 the block diagram and / or flowchart, and combinations of blocks in the block diagram and / 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] In the real-time calculation system and method for commercial vehicle clutch temperature of the present invention, computer program code for performing the operations of the present disclosure can be written in one or more programming languages ​​or a combination thereof. These programming languages ​​include, but are not limited to, object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or power server. In cases involving a remote computer, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (exemplarily using an Internet service provider for Internet connection).

[0112] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for real-time calculation of clutch temperature in commercial vehicles, characterized in that the method... include: S1. After the vehicle is powered on, the chassis controller obtains the last shutdown time t0 and the current power-on time t1. S2. Determine whether the time interval (t1-t0) is greater than the preset time interval ts; S3. If it is greater than, the chassis controller obtains the initial clutch temperature tf0. S4. Calculate the slippage work of the starting or shifting clutch; S5. Calculate the temperature rise Ta caused by clutch slippage; S6. Based on the convective heat transfer model between the clutch and the internal environment of the cavity, calculate the real-time temperature of the clutch and the real-time temperature of the internal environment of the cavity. Step S6 specifically includes: S601. Establish a convective heat transfer temperature model for the clutch and flywheel housing and the internal cavity environment of the clutch housing. S602. Based on the convection heat transfer model, the method for calculating the temperature over time during clutch convection heat transfer is as follows: in, ; ; h is the heat transfer coefficient, cw is the specific heat capacity of the clutch and flywheel materials, cf is the specific heat capacity of the air inside the cavity, mw is the mass of the clutch and flywheel, mf is the mass of the air inside the cavity, and A is the heat transfer area of ​​the pressure plate surface. The method for calculating the temperature of the internal environment of the cavity over time is as follows: S603. Calculate the real-time temperature of the clutch during convective heat transfer and the real-time temperature of the cavity environment according to the calculation method in step S602.

2. The method for real-time calculation of commercial vehicle clutch temperature according to claim 1, characterized in that, In step S4, the slippage work LC of the starting or shifting clutch is calculated as follows: in, Tc is the friction angle, and Tc is the clutch friction torque.

3. The method for real-time calculation of commercial vehicle clutch temperature according to claim 1, characterized in that, The method for calculating the temperature rise Ta caused by clutch slippage in step S5 is as follows: Where γ is the heat transfer ratio and η is the heat absorption efficiency. For the mass of the pressure plate and flywheel, This refers to the specific heat capacity of the clutch and flywheel materials.

4. The method for real-time calculation of commercial vehicle clutch temperature according to claim 1, characterized in that, In the method, the time interval (t1-t0) is not greater than the preset time interval ts; The preset value is then retrieved based on the time interval (t1-t0) as the initial clutch temperature Tf0.

5. A real-time calculation system for the clutch temperature of a commercial vehicle, characterized in that, The system employs the real-time calculation method for the clutch temperature of commercial vehicles as described in any one of claims 1 to 4; The system includes: a timing module, a time judgment module, a chassis controller, a skidding work calculation module, a temperature rise calculation module, and a temperature calculation module; The timing module is used to obtain the last time the engine was turned off (t0) and the current time the engine was turned on (t1) after the vehicle is powered on. The chassis controller is used to determine whether the time interval (t1-t0) is greater than the preset time interval ts; if it is greater, the chassis controller obtains the initial clutch temperature tf0. If it is not greater than, then the preset value is retrieved according to the time interval (t1-t0) as the initial temperature Tf0 of the clutch; The slippage work calculation module is used to calculate the slippage work of the clutch during starting or shifting. The temperature rise calculation module is used to calculate the temperature rise Ta caused by clutch slippage; The temperature calculation module is based on the convective heat transfer model between the clutch and the internal environment of the cavity, and calculates the real-time temperature of the clutch and the real-time temperature of the internal environment of the cavity. The system also includes: a vehicle controller and a data display module; The display prompt module is used to display the real-time clutch heat dissipation temperature and the real-time temperature of the internal environment calculated by the temperature calculation module. The vehicle controller is used to judge the real-time temperature of the clutch cooling system and the real-time temperature of the internal environment. When the above temperatures exceed the corresponding preset thresholds, an alarm is issued through the display prompt module to alert the driver. The temperature calculation module includes: a model building unit, a clutch temperature calculation unit, and a cavity temperature calculation unit. The model building unit is used to build a convective heat transfer temperature model of the clutch and flywheel housing and the internal cavity environment of the clutch housing. The cavity temperature calculation unit is used to calculate the internal ambient temperature of the cavity as follows: The clutch temperature calculation unit is based on the convection heat transfer model. It calculates the temperature over time during clutch convection heat transfer using the following formula, and obtains the real-time temperature of the clutch during convection heat transfer and the real-time temperature of the cavity environment. in, ; ; h is the heat transfer coefficient, cw is the specific heat capacity of the clutch and flywheel materials, cf is the specific heat capacity of the air inside the cavity, mw is the mass of the clutch and flywheel, mf is the mass of the air inside the cavity, and A is the area of ​​the pressure plate surface, which is the heat transfer area.

6. The real-time calculation system for the clutch temperature of a commercial vehicle according to claim 5, characterized in that, The vehicle controller is also used to learn the fluctuation range of the real-time temperature of the clutch cooling system and the fluctuation range of the real-time temperature of the internal environment within a preset time period, and to determine whether the fluctuation is abnormal.

7. A commercial vehicle, characterized in that, include: The real-time calculation system for commercial vehicle clutch temperature as described in any one of claims 5 to 6 includes a timing module, a time judgment module, a chassis controller, a slippage work calculation module, a temperature rise calculation module, and a temperature calculation module. To implement the steps of the real-time calculation method for the clutch temperature of a commercial vehicle as described in any one of claims 1 to 4.

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