Nevina planetary hybrid dual-motor transmission clutch evaluation method and system

Abstract

The application discloses a Navina planetary row hybrid dual-motor gearbox clutch evaluation method and system, and the method comprises the following steps: simplifying the Navina planetary row hybrid dual-motor gearbox into a lever system, and obtaining the simplified lever system; obtaining the speed relationship of each shaft in the lever system during gear shifting; obtaining the torque relationship of each shaft during gear shifting; obtaining the inertia relationship of each shaft during gear shifting; obtaining the friction work and friction power per unit area of the clutch according to the obtained speed relationship, torque relationship and inertia relationship of each shaft during gear shifting; and evaluating the clutch system capability of the Navina planetary row hybrid dual-motor gearbox according to the obtained friction work and friction power per unit area. The Navina planetary row hybrid dual-motor gearbox clutch evaluation method provided by the application can realize the capability analysis and evaluation of the clutch system during the complex planetary row gear shifting process, and provides an evaluation basis for the safe use of the clutch.

Description

TECHNICAL FIELD

[0001] The application relates to the field of automobile technology, in particular to a method and system for evaluating a clutch of a Nivian planetary row hybrid double-motor gearbox. BACKGROUND

[0002] The hybrid gearbox can realize drivability under the premise of fuel saving. The planetary row gearbox is very popular in the industry due to its compact structure and low cost.

[0003] However, the drivability and clutch capacity are difficult to analyze due to the complex shifting process of the planetary row. Therefore, the application provides a clutch capacity evaluation method based on a P1+P3 double-motor Nivian planetary row hybrid architecture. SUMMARY

[0004] The application aims to overcome the shortcomings of the prior art and provide a method and system for evaluating a clutch of a Nivian planetary row hybrid double-motor gearbox.

[0005] In a first aspect, the application provides a method for evaluating a clutch of a Nivian planetary row hybrid double-motor gearbox, comprising the following steps:

[0006] Simplifying the Nivian planetary row hybrid double-motor gearbox into a lever system to obtain the simplified lever system;

[0007] Obtaining the speed relationship of each shaft in the lever system during the shifting process;

[0008] Obtaining the torque relationship of each shaft in the lever system during the shifting process;

[0009] Obtaining the inertia relationship of each shaft in the lever system during the shifting process;

[0010] According to the obtained speed relationship, torque relationship and inertia relationship of each shaft in the lever system during the shifting process, obtaining the friction work and friction power per unit area of the clutch;

[0011] According to the obtained friction work and friction power per unit area, evaluating the clutch system capacity of the Nivian planetary row hybrid double-motor gearbox.

[0012] According to the first aspect, in a second possible implementation manner of the first aspect, the speed relationship of each shaft in the lever system during the shifting process is as follows:

[0013]

[0014]

[0015]

[0016]

[0017] in, and It is the first lever speed ratio and the second lever speed ratio of the planetary gear set conversion. It is the rotational speed of the planetary carrier. It is the rotational speed of the gear ring. It is the rotational speed of the first shaft S1. It is the rotational speed of the third shaft S3.

[0018] According to the first aspect, in a second possible implementation of the first aspect, the torque relationship of each shaft in the lever system during the gear shifting process is as follows:

[0019]

[0020]

[0021] In the formula, To output torque to the planetary carrier, For the torque required by the whole vehicle, Output torque for the second shaft S2 The third shaft S3 outputs torque. and It is the first lever speed ratio and the second lever speed ratio of the planetary gear conversion.

[0022] According to the first aspect, in a third possible implementation of the first aspect, the torque relationship of each shaft in the lever system during the gear shifting process is as follows:

[0023]

[0024]

[0025]

[0026]

[0027] in The output torque of the second shaft S2, This is the output torque of the third shaft S3. Motors Output torque, moment of inertia, angular acceleration These are the output torque, moment of inertia, and angular acceleration of motor EM2, respectively. These are the engine's net output torque (ENG), planetary carrier moment of inertia, and planetary carrier angular acceleration, respectively. These are the vehicle load torque, the vehicle required torque, the gear ring rotational inertia, and the gear ring angular acceleration, respectively. It outputs torque to the planetary carrier.

[0028] According to the first aspect, in the fourth possible implementation of the first aspect, the step of obtaining the frictional work and frictional power per unit area of ​​the clutch based on the obtained rotational speed relationship, torque relationship and inertia relationship of each shaft in the lever system during the gear shifting process specifically includes the following steps:

[0029] Based on the obtained speed, torque, and inertia relationships of each shaft in the lever system during the gear shifting process, the torque and speed difference during the clutch gear shifting process are calculated.

[0030] Based on the torque and speed difference obtained during the clutch shifting process, the frictional work and frictional power per unit area of ​​the clutch are obtained.

[0031] According to the first aspect, in the fifth possible implementation of the first aspect, the step of evaluating the clutch system capability of the Navina planetary gearbox hybrid dual-motor transmission based on the obtained frictional work and frictional power per unit area specifically includes the following steps:

[0032] The frictional power per unit area of ​​the clutch is compared with the limit value of frictional power per unit area of ​​the clutch material to obtain the first comparison result;

[0033] By comparing the obtained frictional power per unit area of ​​the clutch with the limit value of frictional work per unit area of ​​the clutch material, a second comparison result is obtained.

[0034] Based on the first and second comparison results obtained, the ability to acquire the clutch system of the Navina planetary gearbox hybrid dual-motor transmission is evaluated.

[0035] According to the fifth possible implementation of the first aspect, in the sixth possible implementation of the first aspect, the step of evaluating the capability of the Navina planetary gearbox hybrid dual-motor transmission clutch system based on the obtained first comparison result and second comparison result specifically includes the following steps:

[0036] When the frictional power per unit area of ​​the clutch is less than the frictional limit per unit area of ​​the clutch material and the frictional work per unit area of ​​the clutch is less than the frictional work limit per unit area of ​​the clutch material, the shifting operation of the Navina planetary gearbox hybrid dual-motor transmission is assessed as not exceeding the limit capacity of the clutch system.

[0037] Secondly, this application provides a Navina planetary gearbox hybrid dual-motor transmission clutch evaluation system, comprising:

[0038] A simplification module is used to simplify the Navina planetary gearbox hybrid dual-motor gearbox into a lever system, and obtain the simplified lever system.

[0039] The speed relationship acquisition module is used to acquire the speed relationship of each shaft in the lever system during the gear shifting process;

[0040] The torque relationship acquisition module is used to acquire the torque relationship of each shaft in the lever system during the gear shifting process;

[0041] The inertia relationship acquisition module is used to acquire the inertia relationship of each axis in the lever system during the gear shifting process;

[0042] The clutch capability evaluation parameter acquisition module is communicatively connected to the speed relationship acquisition module, the torque relationship acquisition module, and the inertia relationship acquisition module. It is used to acquire the friction work and friction power per unit area of ​​the clutch based on the acquired speed relationship, torque relationship, and inertia relationship of each shaft in the lever system during the gear shifting process.

[0043] The clutch capability evaluation module is communicatively connected to the clutch capability evaluation parameter acquisition module, and is used to evaluate the clutch system capability of the Navina planetary gearbox hybrid dual-motor transmission based on the acquired friction work and friction power per unit area.

[0044] According to the second aspect, in a first possible implementation of the second aspect, the clutch capability evaluation module includes:

[0045] The first acquisition unit calculates and acquires the torque and speed difference during the clutch shifting process based on the acquired rotational speed relationship, torque relationship and inertia relationship of each shaft in the lever system during the shifting process.

[0046] The second acquisition unit is communicatively connected to the first acquisition unit and is used to acquire the friction work and friction power per unit area of ​​the clutch based on the acquired torque and speed difference during the clutch shifting process.

[0047] According to the second aspect, in a second possible implementation of the second aspect, the clutch capability evaluation module includes:

[0048] The first comparison unit compares the frictional power per unit area of ​​the clutch with the limit value of frictional power per unit area of ​​the clutch material to obtain the first comparison result.

[0049] The second comparison unit compares the frictional power per unit area of ​​the clutch with the limit value of frictional work per unit area of ​​the clutch material to obtain the second comparison result.

[0050] The evaluation unit is communicatively connected to the first comparison unit and the second comparison unit, and is used to evaluate the capability of the Navina planetary gearbox hybrid dual-motor transmission clutch system based on the acquired first comparison result and second comparison result.

[0051] Compared with the prior art, the advantages of the present invention are as follows:

[0052] The evaluation method for the clutch of the Navina planetary gearbox hybrid dual-motor gearbox provided in this application can realize the capability analysis and evaluation of the clutch system during the complex planetary gearbox shifting process, enrich the clutch system capability evaluation method, and provide an evaluation basis for the safe use of the clutch. Attached Figure Description

[0053] Figure 1 The flowchart of the evaluation method for the clutch of the Navina planetary gearbox hybrid dual-motor gearbox provided in this application;

[0054] Figure 2 A simplified schematic diagram of the lever system architecture in the evaluation method for the clutch of the Navina planetary hybrid dual-motor gearbox provided in this application;

[0055] Figure 3 The rotational phase diagram of the Navina planetary gearbox hybrid dual-motor transmission provided in this application during the entire shifting process;

[0056] Figure 4 Torque phase diagram of the Navina planetary gearbox hybrid dual-motor transmission provided in this application during the entire shifting process;

[0057] Figure 5 The inertial phase diagram of the entire shifting process of the Navina planetary gearbox hybrid dual-motor transmission provided in this application;

[0058] Figure 6 A diagram showing the clutch slippage work and the relationship between power and time during the entire shifting process of the Navina planetary gear hybrid dual-motor transmission provided in this application;

[0059] Figure 7 A schematic diagram of the control panel for calculating the speed relationship of each axis during gear shifting provided in this application;

[0060] Figure 8 A schematic diagram of the control panel for calculating the torque relationship of each axis during gear shifting, provided in this application;

[0061] Figure 9 A schematic diagram of the control panel for calculating the inertia relationship of each axis during gear shifting, provided in this application;

[0062] Figure 10 This application provides a schematic diagram of a control panel for calculating the working intensity of each shaft during gear shifting based on the clutch speed difference and the torque it bears. Detailed Implementation

[0063] To enable those skilled in the art to better understand the present invention and its objectives, technical solutions, and advantages, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention. Furthermore, the terms "comprising" and "having," and any variations thereof, in the specification and claims of the present invention are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0064] Existing planetary gear shifting processes are complex, and drivability and clutch capability are difficult to analyze.

[0065] In view of this, this application provides a method for evaluating the capability of a clutch system, and more specifically, a method for evaluating the clutch of a Navina planetary gearbox hybrid dual-motor transmission by verifying the strength of the clutch capability during the shifting process.

[0066] See Figure 1 As shown in the figure, this embodiment of the invention provides a method for evaluating the clutch of a Navina planetary gearbox hybrid dual-motor transmission, including the following steps:

[0067] Step S1: Simplify the Navina planetary gearbox hybrid dual-motor transmission into a lever system, and obtain the simplified lever system, such as... Figure 2 As shown, the simplified lever system includes a first motor EM1, a second motor EM2, an engine ENG, a first clutch C1, a second clutch C2, a first brake B1, a second brake B2, a gear ring R, a first shaft S1, a second shaft S2, and a third shaft S3. The engine ENG and the second motor EM2 have a fixed speed ratio. EM2 can generate electricity or provide power. EM1 is a wheel-end motor, and Out is the wheel-end output shaft. C1 and C2 are clutches, and B1 and B2 are brakes. Through the clutches and brakes, the system can achieve series, parallel, and parallel gear shifting, etc.

[0068] Step S2: Obtain the rotational speed relationship of each shaft in the lever system during the gear shifting process;

[0069] Step S3: Obtain the torque relationship of each axis in the lever system during the gear shifting process;

[0070] Step S4: Obtain the inertia relationship of each axis in the lever system during the gear shifting process;

[0071] Step S5: Based on the obtained speed, torque and inertia relationships of each shaft in the lever system during the gear shifting process, obtain the frictional work and frictional power per unit area of ​​the clutch.

[0072] Step S6: Based on the obtained frictional work and frictional power per unit area, evaluate the clutch system capability of the Navina planetary gearbox hybrid dual-motor transmission.

[0073] The evaluation method for the clutch of the Navina planetary gearbox hybrid dual-motor gearbox provided in this application can realize the capability analysis and evaluation of the clutch system during the complex planetary gearbox shifting process, enrich the clutch system capability evaluation method, and provide an evaluation basis for the safe use of the clutch.

[0074] As described above, the rotational speed phase is such that the rotational speed remains constant during the torque interaction phase, and during the speed regulation process, assuming that the wheel-side rotational speed remains constant, the rotational speed of S3 decreases, while the rotational speeds of the C-axis and S2-axis increase.

[0075] As mentioned above, during the torque phase shift, only the torque changes and there is no change in speed (i.e., speed ratio), hence the name torque phase. Specifically, during the torque interaction process, the C-axis and S2-axis exchange torques, and the wheel-side torque decreases.

[0076] like Figures 3-5 The diagrams shown illustrate the rotational speed phase, torque phase, inertia phase, clutch slippage work, and power. In one embodiment, the rotational speed relationships of the shafts in the lever system during gear shifting are as follows:

[0077]

[0078]

[0079]

[0080]

[0081] in, and It is the first lever speed ratio and the second lever speed ratio of the planetary gear set conversion. It is the rotational speed of the planetary carrier. It is the rotational speed of the gear ring. It is the rotational speed of the first shaft S1. It is the rotational speed of the third shaft S3.

[0082] In one embodiment, the step of obtaining the torque relationship of each shaft in the lever system during the gear shifting process is as follows:

[0083] The torque relationship of each shaft in the lever system during gear shifting is as follows:

[0084]

[0085]

[0086] In the formula, To output torque to the planetary carrier, For the torque required by the whole vehicle, Output torque for the second shaft S2 The third shaft S3 outputs torque. and It is the first lever speed ratio and the second lever speed ratio of the planetary gear conversion.

[0087] In one embodiment, the torque relationship of each shaft in the lever system during the gear shifting process is shown in the following formula:

[0088]

[0089]

[0090]

[0091]

[0092] in The output torque of the second shaft S2, This is the output torque of the third shaft S3. Motors Output torque, moment of inertia, angular acceleration These are the output torque, moment of inertia, and angular acceleration of motor EM2, respectively. These are the engine's net output torque (ENG), planetary carrier moment of inertia, and planetary carrier angular acceleration, respectively. These are the vehicle load torque, the vehicle required torque, the gear ring rotational inertia, and the gear ring angular acceleration, respectively. It outputs torque to the planetary carrier.

[0093] In one embodiment, the step of obtaining the frictional work and frictional power per unit area of ​​the clutch based on the obtained rotational speed relationship, torque relationship, and inertia relationship of each shaft in the lever system during the gear shifting process specifically includes the following steps:

[0094] Based on the obtained speed, torque, and inertia relationships of each shaft in the lever system during gear shifting, the torque and speed difference during clutch shifting are calculated. Specifically, taking a shift from 2nd to 3rd gear as an example, C1 remains engaged; B2 clears torque while C2 increases torque, resulting in torque interaction. Finally, C2 engages. Throughout the entire shifting process, the torques of clutches C2 and B2 can be calculated. The real-time torque of C2 is Tc, and the torque of B2 is Ts2. The speed difference of C2 can be obtained by calculating the speed difference between the C-axis speed and the S3 speed.

[0095] Navina planetary gearbox hybrid dual-motor transmission power 2nd to 3rd gear shift brake clutch status table

[0096] Start C1 lock B2 lock Torque interaction C2 torque up B2 torque clear Attitude adjustment (speed regulation) B2 open C2 slip End C1 lock C2 lock

[0097] Based on the torque and speed difference obtained during the clutch shifting process, the friction work and friction power per unit area of ​​the clutch are obtained. The clutch parameters are known throughout the shifting process. Based on the real-time torque and relative speed of the clutch, the friction power and integral work are calculated.

[0098] In a more specific embodiment, by means of, Figures 7-10 The rotational speed, torque, and inertial phase relationships of each shaft during gear shifting are calculated separately. The working intensity is calculated based on the clutch speed difference and the integral of the torque borne during gear shifting.

[0099] In one embodiment, the step of evaluating the clutch system capability of the Navina planetary gearbox hybrid dual-motor transmission based on the obtained frictional work and frictional power per unit area specifically includes the following steps:

[0100] The frictional power per unit area of ​​the clutch is compared with the limit value of frictional power per unit area of ​​the clutch material to obtain the first comparison result;

[0101] By comparing the obtained frictional power per unit area of ​​the clutch with the limit value of frictional work per unit area of ​​the clutch material, a second comparison result is obtained.

[0102] Based on the first and second comparison results obtained, the ability to acquire the clutch system of the Navina planetary gearbox hybrid dual-motor transmission is evaluated.

[0103] In a more specific embodiment, the maximum frictional work per unit area of ​​the clutch material is 105 kJ, and the maximum frictional power per unit area of ​​the clutch material is 143 W / cm². 2 .

[0104] In one embodiment, the step of evaluating the capability of the Navina planetary gearbox hybrid dual-motor transmission clutch system based on the acquired first comparison result and second comparison result specifically includes the following steps:

[0105] When the frictional power per unit area of ​​the clutch is less than the frictional limit value per unit area of ​​the clutch material and the frictional work per unit area of ​​the clutch is less than the frictional work limit value per unit area of ​​the clutch material, it is determined that the shifting operation of the Navina planetary gearbox hybrid dual-motor transmission does not exceed the limit capacity of the clutch system.

[0106] When the frictional power per unit area of ​​the clutch is not less than the frictional limit value per unit area of ​​the clutch material and / or the frictional work per unit area of ​​the clutch is less than the frictional work limit value per unit area of ​​the clutch material, the shifting operation of the Navina planetary gearbox hybrid dual-motor gearbox is deemed to exceed the limit capacity of the clutch system, or be insufficient.

[0107] Secondly, this application provides a clutch evaluation system for a Navina planetary gearbox hybrid dual-motor transmission, including a simplification module, a speed relationship acquisition module, a torque relationship acquisition module, an inertia relationship acquisition module, a clutch capability evaluation parameter acquisition module, and a clutch capability evaluation module. The simplification module is used to simplify the Navina planetary gearbox hybrid dual-motor transmission into a lever system and obtain the simplified lever system. The speed relationship acquisition module is used to obtain the speed relationship of each shaft in the lever system during the shifting process. The torque relationship acquisition module is used to obtain the torque relationship of each shaft in the lever system during the shifting process. The inertia relationship acquisition module is used to obtain the inertia relationship of each shaft in the lever system during the shifting process. The clutch capability evaluation parameter acquisition module is communicatively connected to the speed relationship acquisition module, the torque relationship acquisition module, and the inertia relationship acquisition module, and is used to obtain the friction work and friction power per unit area of ​​the clutch based on the obtained speed relationship, torque relationship, and inertia relationship of each shaft in the lever system during the shifting process. The clutch capability evaluation module is communicatively connected to the clutch capability evaluation parameter acquisition module, and is used to evaluate the clutch system capability of the Navina planetary gearbox hybrid dual-motor transmission based on the obtained friction work and friction power per unit area.

[0108] In one embodiment, the clutch capability evaluation module includes:

[0109] The first acquisition unit calculates and acquires the torque and speed difference during the clutch shifting process based on the acquired rotational speed relationship, torque relationship and inertia relationship of each shaft in the lever system during the shifting process.

[0110] The second acquisition unit is communicatively connected to the first acquisition unit and is used to acquire the friction work and friction power per unit area of ​​the clutch based on the acquired torque and speed difference during the clutch shifting process.

[0111] In one embodiment, the clutch capability evaluation module includes:

[0112] The first comparison unit compares the frictional power per unit area of ​​the clutch with the limit value of frictional power per unit area of ​​the clutch material to obtain the first comparison result.

[0113] The second comparison unit compares the frictional power per unit area of ​​the clutch with the limit value of frictional work per unit area of ​​the clutch material to obtain the second comparison result.

[0114] The evaluation unit is communicatively connected to the first comparison unit and the second comparison unit, and is used to evaluate the capability of the Navina planetary gearbox hybrid dual-motor transmission clutch system based on the acquired first comparison result and second comparison result.

[0115] Based on the same inventive concept, embodiments of this application also provide a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements all or part of the method steps of the above method.

[0116] The present invention can implement all or part of the processes in the above methods, or it can be accomplished by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0117] Based on the same inventive concept, embodiments of this application also provide an electronic device, including a memory and a processor. The memory stores a computer program that runs on the processor. When the processor executes the computer program, it implements all or part of the method steps described above.

[0118] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of a computer device, connecting all parts of the computer device through various interfaces and lines.

[0119] Memory can be used to store computer programs and / or modules. The processor performs various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and by accessing data stored in the memory. Memory can primarily include a program storage area and a data storage area. The program storage area can store the operating system and at least one application program required for a function (e.g., sound playback, image playback, etc.); the data storage area can store data created based on the use of the mobile phone (e.g., audio data, video data, etc.). Furthermore, memory can include high-speed random access memory, and can also include non-volatile memory, such as hard disks, RAM, plug-in hard disks, SmartMedia Cards (SMC), Secure Digital (SD) cards, Flash Cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0120] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, servers, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0121] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), servers, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0122] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0123] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0124] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for evaluating the clutch of a Navina planetary gearbox hybrid dual-motor transmission, characterized in that, Includes the following steps: The Navina planetary gearbox hybrid dual-motor transmission was simplified into a lever system, and the simplified lever system was obtained. The rotational speed relationship of each shaft in the lever system during gear shifting is shown in the following formula: in, and It is the first lever speed ratio and the second lever speed ratio of the planetary gear set conversion. It is the rotational speed of the planetary carrier. It is the rotational speed of the gear ring. It is the rotational speed of the first shaft S1. It is the rotational speed of the third shaft S3; Obtain the torque relationship of each axis in the lever system during gear shifting; The torque relationship of each shaft in the lever system during gear shifting is as follows: In the formula, To output torque to the planetary carrier, For the torque required by the whole vehicle, Output torque for the second shaft S2 The third shaft S3 outputs torque. and It refers to the first lever speed ratio and the second lever speed ratio in planetary gear conversion; Obtain the inertia relationship of each axis in the lever system during gear shifting; The inertia relationship of each axis in the lever system during the gear shifting process is shown in the following formula: in The output torque of the second shaft S2, This refers to the output torque of the third shaft S3. Motors Output torque, moment of inertia, angular acceleration Motors The output torque, moment of inertia, and angular acceleration, These are the engine's net output torque (ENG), planetary carrier moment of inertia, and planetary carrier angular acceleration, respectively. These are the vehicle load torque, the vehicle required torque, the gear ring rotational inertia, and the gear ring angular acceleration, respectively. Output torque to the planetary carrier; Based on the obtained speed, torque and inertia relationships of each shaft in the lever system during the gear shifting process, the frictional work and frictional power per unit area of ​​the clutch are obtained. Based on the obtained frictional work and frictional power per unit area, the clutch system capability of the Navina planetary gearbox hybrid dual-motor transmission is evaluated.

2. The evaluation method for the clutch of the Navina planetary gearbox hybrid dual-motor transmission as described in claim 1, characterized in that, The step of obtaining the frictional work and frictional power per unit area of ​​the clutch based on the obtained rotational speed, torque, and inertia relationships of each shaft in the lever system during the gear shifting process includes the following steps: Based on the obtained speed, torque, and inertia relationships of each shaft in the lever system during the gear shifting process, the torque and speed difference during the clutch gear shifting process are calculated. Based on the torque and speed difference obtained during the clutch shifting process, the frictional work and frictional power per unit area of ​​the clutch are obtained.

3. The evaluation method for the clutch of the Navina planetary gearbox hybrid dual-motor transmission as described in claim 1, characterized in that, The step of evaluating the clutch system capability of the Navina planetary gearbox hybrid dual-motor transmission based on the obtained frictional work and frictional power per unit area specifically includes the following steps: The frictional power per unit area of ​​the clutch is compared with the limit value of frictional power per unit area of ​​the clutch material to obtain the first comparison result; By comparing the obtained frictional power per unit area of ​​the clutch with the limit value of frictional work per unit area of ​​the clutch material, a second comparison result is obtained. Based on the first and second comparison results obtained, the ability to acquire the clutch system of the Navina planetary gearbox hybrid dual-motor transmission is evaluated.

4. The evaluation method for the clutch of the Navina planetary gearbox hybrid dual-motor transmission as described in claim 3, characterized in that, The step of evaluating the capability of the Navina planetary hybrid dual-motor gearbox clutch system based on the first and second comparison results specifically includes the following steps: When the frictional power per unit area of ​​the clutch is less than the frictional limit per unit area of ​​the clutch material and the frictional work per unit area of ​​the clutch is less than the frictional work limit per unit area of ​​the clutch material, the shifting operation of the Navina planetary gearbox hybrid dual-motor transmission is assessed as not exceeding the limit capacity of the clutch system.

5. A system applied in the evaluation method for the clutch of a Navina planetary gearbox hybrid dual-motor transmission as described in any one of claims 1-4, characterized in that, include: A simplification module is used to simplify the Navina planetary gearbox hybrid dual-motor gearbox into a lever system, and obtain the simplified lever system. The speed relationship acquisition module is used to acquire the speed relationship of each shaft in the lever system during the gear shifting process; The torque relationship acquisition module is used to acquire the torque relationship of each shaft in the lever system during the gear shifting process; The inertia relationship acquisition module is used to acquire the inertia relationship of each axis in the lever system during the gear shifting process; The clutch capability evaluation parameter acquisition module is communicatively connected to the speed relationship acquisition module, the torque relationship acquisition module, and the inertia relationship acquisition module. It is used to acquire the friction work and friction power per unit area of ​​the clutch based on the acquired speed relationship, torque relationship, and inertia relationship of each shaft in the lever system during the gear shifting process. The clutch capability evaluation module is communicatively connected to the clutch capability evaluation parameter acquisition module, and is used to evaluate the clutch system capability of the Navina planetary gearbox hybrid dual-motor transmission based on the acquired friction work and friction power per unit area.

6. The system as described in claim 5, characterized in that, The clutch capability evaluation module includes: The first acquisition unit calculates and acquires the torque and speed difference during the clutch shifting process based on the acquired rotational speed relationship, torque relationship and inertia relationship of each shaft in the lever system during the shifting process. The second acquisition unit is communicatively connected to the first acquisition unit and is used to acquire the friction work and friction power per unit area of ​​the clutch based on the acquired torque and speed difference during the clutch shifting process.

7. The system as described in claim 5, characterized in that, The clutch capability evaluation module includes: The first comparison unit compares the frictional power per unit area of ​​the clutch with the limit value of frictional power per unit area of ​​the clutch material to obtain the first comparison result. The second comparison unit compares the frictional power per unit area of ​​the clutch with the limit value of frictional work per unit area of ​​the clutch material to obtain the second comparison result. The evaluation unit is communicatively connected to the first comparison unit and the second comparison unit, and is used to evaluate the capability of the Navina planetary gearbox hybrid dual-motor transmission clutch system based on the acquired first comparison result and second comparison result.

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