Longitudinal hybrid transmission system and control method

Abstract

The embodiment of the invention provides a longitudinal hybrid transmission system and a control method, the system is arranged in a transmission shell, and the system comprises a hybrid module, a first clutch, a hydraulic torque converter and a planetary gear shifting module which are sequentially connected through a first input shaft; the hybrid module comprises a second clutch, a first planetary gear mechanism and a motor; the hybrid module, the first clutch, the hydraulic torque converter and the planetary gear shifting module are sequentially connected through the first input shaft and are arranged in the transmission shell, the first input shaft and the third output shaft are coaxially arranged, the whole module is coaxially arranged and adopts a longitudinal layout mode, the axial and radial space is fully utilized, the cost is reduced, and the transmission efficiency is improved. And meanwhile, a hybrid module is added on the basis of retaining the structure of the hydraulic torque converter, so that the smoothness is ensured, the dynamic property is effectively improved, and the oil consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of transmission technology, and more specifically, to a longitudinal hybrid transmission system and control method. Background Art

[0002] In recent years, planetary gears have been widely used in automatic transmissions. Due to their unique transmission method, they have spawned a number of excellent transmission configurations. The most representative of these is the automatic transmission (AT), which has become a mainstream transmission product due to its excellent driving comfort. The popular 8AT utilizes an innovative four-degree-of-freedom mechanism, which offers a simple structure, high transmission efficiency, excellent shifting logic, and high shifting comfort. However, it still suffers from large space requirements and high costs. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a longitudinal hybrid transmission system and control method to solve the problem that the existing transmission configuration still has large space occupation and high cost.

[0004] In a first aspect, an embodiment of the present application provides a longitudinal hybrid transmission system, which is arranged in a transmission housing and includes a hybrid module, a first clutch, a torque converter and a planetary gear shift module connected in sequence through a first input shaft; the hybrid module includes a second clutch, a first planetary gear mechanism and a motor; the second clutch is connected to the engine through the first input shaft, the planetary carrier of the first planetary gear mechanism is connected to the second clutch and the planetary carrier of the first planetary gear mechanism is connected to the first clutch through the first input shaft, and the ring gear of the first planetary gear mechanism is connected to the motor rotor; the planetary gear shift module is connected to the wheel end through a third output shaft, and the first input shaft and the third output shaft are coaxially arranged.

[0005] In the above implementation process, the hybrid module, the first clutch, the torque converter and the planetary gear shift module are connected in sequence through the first input shaft and arranged in the transmission housing. The first input shaft and the third output shaft are coaxially arranged. The entire module is coaxially arranged and adopts a longitudinal layout to fully utilize the axial and radial space and reduce costs. At the same time, the hybrid module is added on the basis of retaining the structure of the torque converter, which not only ensures smoothness, but also effectively improves power and reduces fuel consumption.

[0006] Furthermore, the planetary gear shift module includes a planetary gear set and a clutch shift element, and the planetary gear set is connected to the clutch shift element through a shaft set.

[0007] Furthermore, the planetary gear set includes a second planetary gear mechanism, a third planetary gear mechanism, a fourth planetary gear mechanism and a fifth planetary gear mechanism.

[0008] Furthermore, the second planetary gear mechanism, the third planetary gear mechanism, the fourth planetary gear mechanism and the fifth planetary gear mechanism are connected in series in sequence.

[0009] Furthermore, the clutch shift element includes a first shift element, a second shift element, a third shift element, a fourth shift element, and a fifth shift element, and the shaft group includes the first input shaft, the second shaft, the third output shaft, the fourth shaft, the fifth shaft, the sixth shaft, and the seventh shaft; the first shift element is connected to the second shift element, and the third shift element is connected to the fourth shift element through the second shaft;

[0010] The ring gear of the second planetary gear mechanism is connected to the second shift element, the planet carrier is connected to the ring gear of the fifth planetary gear mechanism, and the sun gear is connected to the first shift element and the sun gear of the third planetary gear mechanism through the fourth shaft; the ring gear of the third planetary ring gear mechanism is connected to the sun gear of the fourth planetary ring gear mechanism through the fifth shaft, and the planet carrier is connected to the fourth shift element through the first input shaft; the ring gear of the fourth planetary ring gear mechanism is connected to the third shift element through the second shaft, and the planet carrier is connected to the fifth shift element through the sixth shaft; the planet carrier of the fifth planetary ring gear mechanism is connected to the fifth shift element through the sixth shaft, and the sun gear is connected to the fourth shift element through the second shaft.

[0011] In the above implementation process, by rationally arranging the relative positions of the planetary gear set and the clutch shifting elements in the transmission housing, the relative speed of the clutch driving and driven parts is reduced, so that a more compact design can be achieved in actual design, which can fully utilize the axial and radial space and reduce costs.

[0012] Furthermore, the planetary gears and the ring gear of the planetary gear set are in a mutually meshing relationship, and the ring gear and the sun gear are in a mutually meshing relationship; the second planetary gear mechanism, the third planetary gear mechanism, the fourth planetary gear mechanism and the fifth planetary gear mechanism are coaxially arranged side by side on the axis formed by the first input shaft and the third output shaft.

[0013] In the above implementation process, the axial and radial space in the transmission housing is saved, and the cost is reduced.

[0014] Furthermore, lubricating shift control oil channels are provided inside the first input shaft and the third output shaft and on the housing. The lubricating shift control oil channels form a hydraulic system with the oil pump and the control valve block; the hydraulic system is used to open or close the clutch shift element to switch gears.

[0015] In the above implementation process, the opening and closing control of the clutch shift element is realized, ensuring the gear switching of the vehicle.

[0016] In a second aspect, an embodiment of the present application provides a longitudinal hybrid transmission control method, which is implemented based on the aforementioned longitudinal hybrid transmission system and specifically includes:

[0017] When the transmission operates in the engine direct drive and electric drive power generation mode, the first clutch and the second clutch are closed, and the power of the engine is sequentially transmitted to the planetary gear shift module through the hybrid module, the first clutch, and the torque converter, and then transmitted to the wheel end through the planetary gear shift module. The power of the engine drives the motor rotor through the first planetary gear mechanism to drive the motor to generate electricity;

[0018] When the transmission operates in a combined engine and motor drive mode, the first clutch and the second clutch are closed, and the power of the engine is sequentially transmitted to the planetary gear shift module through the hybrid module, the first clutch, and the torque converter. The motor rotor transmits the driving force generated by the motor to the planetary gear shift module through the first planetary gear mechanism, and the power is then transmitted to the wheel end through the planetary gear shift module.

[0019] When the transmission is operated in the motor-only drive mode, the first clutch is closed and the second clutch is open, and the motor rotor transmits the driving force generated by the motor to the planetary gear shift module through the first planetary gear mechanism, and transmits the power to the wheel end through the planetary gear shift module;

[0020] When the transmission operates in an electric drive and power generation mode, the first clutch is disconnected and the second clutch is closed, and the power of the engine drives the motor rotor through the first planetary gear mechanism to drive the motor to generate electricity.

[0021] Furthermore, when the wheel end obtains power, the method further includes:

[0022] When the first shift element, the second shift element, and the fourth shift element are closed, the seventh shaft is locked, the first input shaft and the seventh shaft are at the same speed, power is input through the first input shaft and drives the third output shaft through the fifth planetary gear mechanism, thereby obtaining a first forward gear mode;

[0023] When the first shift element, the second shift element, and the third shift element are closed, the fourth shaft and the seventh shaft are locked, the second shaft and the fifth shaft are at the same speed, and power is input through the first input shaft and drives the third output shaft through the third planetary gear mechanism and the fifth planetary gear mechanism, thereby obtaining a second forward gear mode;

[0024] When the second, third, and fourth shift elements are closed, the first, second, fourth, and fifth shafts are driven at the same speed, and power is input through the first input shaft and driven by the second and fifth planetary gear mechanisms to jointly drive the third output shaft, thereby achieving a third forward gear mode.

[0025] When the second, third, and fifth shift elements are closed, the second, third, and sixth shafts are driven at the same speed, and power is input through the first input shaft and driven by the second and third planetary gear mechanisms to drive the third output shaft, thereby achieving a fourth forward gear mode.

[0026] When the second shift element, the fourth shift element, and the fifth shift element are closed, the first shaft and the second shaft are at the same speed, the third shaft and the sixth shaft are at the same speed, power is input through the first input shaft and passes through the second planetary gear mechanism, the third planetary gear mechanism, the fourth planetary gear mechanism, and the fifth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a fifth forward gear mode;

[0027] When the third shift element, the fourth shift element, and the fifth shift element are closed, power directly drives the third output shaft through the first input shaft, thereby obtaining a sixth forward gear mode;

[0028] When the first shift element, the fourth shift element, and the fifth shift element are closed, the fourth shaft is locked, the first shaft and the seventh shaft are at the same speed, and the third shaft and the sixth shaft are at the same speed, power is input through the first input shaft and passes through the third planetary gear mechanism and the fourth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a seventh forward gear mode;

[0029] When the first shift element, the third shift element and the fifth shift element are closed, the fourth shaft is locked, the second shaft, the third shaft, the fifth shaft and the sixth shaft are at the same speed, power is input through the first input shaft and drives the third output shaft through the third planetary gear mechanism, thereby obtaining the eighth forward gear mode.

[0030] Furthermore, when the wheel end obtains power, the method further includes:

[0031] When the first shift element, the second shift element and the fifth shift element are closed, the fourth shaft and the seventh shaft are locked, the third shaft and the sixth shaft are at the same speed, power is input through the first input shaft and passes through the third planetary gear mechanism and the fourth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a reverse gear mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A schematic structural diagram of a longitudinal hybrid transmission system provided in the first embodiment of the present application;

[0034] Figure 2 A flowchart of a longitudinal hybrid transmission control method provided in the second embodiment of the present application;

[0035] Figure 3 A schematic diagram of the shift logic of a longitudinal hybrid transmission control method provided in the second embodiment of the present application;

[0036] Among them, 1. First input shaft; 2. Second shaft; 3. Third output shaft; 4. Fourth shaft; 5. Fifth shaft; 6. Sixth shaft; 7. Seventh shaft; 10. Hybrid module; 11. Motor stator; 12. Motor rotor; 20. Torque converter; K1. First clutch; K0. Second clutch; P0. First planetary gear mechanism; P1. Second planetary gear mechanism; P2. Third planetary gear mechanism; P3. Fourth planetary gear mechanism; P4. Fifth planetary gear mechanism; C1. First shift element; C2. Second shift element; C3. Third shift element; C4. Fourth shift element; C5. Fifth shift element. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0038] It should be noted that in the description of this application, the terms "first" and "second" are used solely for descriptive purposes and should not be construed as indicating or implying relative importance. Furthermore, the step numbers herein are provided solely to facilitate explanation of the embodiments of this application and do not serve to define the order in which the steps must be executed. The methods provided in the embodiments of this application can be executed by relevant terminal devices, and the following description will be based on a longitudinal hybrid transmission system as the example.

[0039] The AT (Automatic Transmission) module is a core component in the automotive power system. It realizes gear switching through automated control, improving driving comfort, fuel economy and power performance.

[0040] 8AT (8-Speed ​​Automatic Transmission) refers to an automatic transmission with 8 forward gears and is one of the important technologies in modern automobile transmission systems.

[0041] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a longitudinal hybrid transmission system provided in the first embodiment of the present application. The first embodiment of the present application provides a longitudinal hybrid transmission system, which is disposed within a transmission housing and includes a hybrid module 10, a first clutch K1, a torque converter 20, and a planetary gear shift module, which are sequentially connected via a first input shaft 1. The hybrid module includes a second clutch K0, a first planetary gear mechanism P0, and an electric motor. The second clutch is connected to the engine via the first input shaft, the planetary carrier of the first planetary gear mechanism is connected to the second clutch, and the planetary carrier of the first planetary gear mechanism is connected to the first clutch via the first input shaft, and the ring gear of the first planetary gear mechanism is connected to the electric motor rotor 12. The planetary gear shift module is connected to the wheel end via a third output shaft, and the first input shaft and the third output shaft are coaxially arranged.

[0042] As described above, in the embodiment of the present application, the hybrid module, the first clutch, the torque converter and the planetary gear shift module are connected in sequence through the first input shaft and arranged in the transmission housing. The first input shaft and the third output shaft are coaxially arranged, and the entire module is coaxially arranged and adopts a longitudinal layout, which fully utilizes the axial and radial space and reduces costs. At the same time, the hybrid module is added on the basis of retaining the structure of the torque converter, which not only ensures smoothness, but also effectively improves power and reduces fuel consumption.

[0043] As you can understand, a motor consists of a stator 11 and a rotor. These are the two core components of a motor, which convert and transmit electrical energy through electromagnetic interaction. The stator, as the stationary part, is responsible for generating a magnetic field and providing support; the rotor, as the rotating part, is responsible for achieving rotation and transmitting torque.

[0044] Optionally, the torque converter consists of a pump impeller, a turbine, a stator and a torque converter housing.

[0045] In some embodiments, the planetary gear shift module includes a planetary gear set and a clutch shift element, and the planetary gear set is connected to the clutch shift element via a shaft set.

[0046] In some embodiments, the planetary gear set includes a second planetary gear mechanism P1 , a third planetary gear mechanism P2 , a fourth planetary gear mechanism P3 , and a fifth planetary gear mechanism P4 .

[0047] In some embodiments, the second planetary gear mechanism, the third planetary gear mechanism, the fourth planetary gear mechanism, and the fifth planetary gear mechanism are sequentially connected in series.

[0048] In some embodiments, the clutch shifting element includes a first shifting element C1, a second shifting element C2, a third shifting element C3, a fourth shifting element C4 and a fifth shifting element C5, and the shaft group includes the first input shaft, the second shaft 2, the third output shaft, the fourth shaft 4, the fifth shaft 5, the sixth shaft 6 and the seventh shaft 7; the first shifting element is connected to the second shifting element, and the third shifting element is connected to the fourth shifting element through the second shaft; the ring gear of the second planetary gear mechanism is connected to the second shifting element, and the planet carrier is connected to the ring gear of the fifth planetary gear mechanism. The positive gear is connected to the first shift element and the sun gear of the third planetary gear mechanism through the fourth shaft; the ring gear of the third planetary ring gear mechanism is connected to the sun gear of the fourth planetary ring gear mechanism through the fifth shaft, and the planet carrier is connected to the fourth shift element through the first input shaft; the ring gear of the fourth planetary ring gear mechanism is connected to the third shift element through the second shaft, and the planet carrier is connected to the fifth shift element through the sixth shaft; the planet carrier of the fifth planetary ring gear mechanism is connected to the fifth shift element through the sixth shaft, and the sun gear is connected to the fourth shift element through the second shaft.

[0049] Therefore, by rationally arranging the relative positions of the planetary gear set and the clutch shifting elements in the transmission housing, the relative speed of the clutch driving and driven parts is reduced, so that a more compact design can be achieved in actual design, which can fully utilize the axial and radial space and reduce costs.

[0050] Optionally, the shaft groups all use rotating shaft or sleeve parts; the planetary gear groups all use NGW (ZK-H) type planetary gears.

[0051] In some embodiments, the planetary gears and the ring gear of the planetary gear set are in a mutually meshing relationship, and the ring gear and the sun gear are in a mutually meshing relationship; the second planetary gear mechanism, the third planetary gear mechanism, the fourth planetary gear mechanism and the fifth planetary gear mechanism are coaxially arranged side by side on the axis formed by the first input shaft and the third output shaft; thereby saving axial and radial space in the transmission housing and reducing costs.

[0052] In some embodiments, lubrication shift control oil channels are provided inside the first input shaft and the third output shaft and on the housing, and the lubrication shift control oil channels form a hydraulic system with the oil pump and the control valve block; the hydraulic system is used to open or close the clutch shift element to perform gear switching; thereby, the opening and closing control of the clutch shift element is achieved, ensuring the gear switching of the vehicle.

[0053] As described above, the embodiments of the present application propose a novel coaxial multi-speed transmission configuration, employing four NGW-type planetary gear mechanisms and five shift elements to achieve a high-ratio transmission design with at least eight switchable forward gears and at least one reverse gear. This configuration, through the rational arrangement of the relative positions of the planetary gear sets and shift elements within the transmission housing, reduces the relative speed of the clutch driver and driven components, enabling a more compact design, fully utilizing axial and radial space, and reducing costs. Furthermore, due to the reduced axial space, the P2 motor module is added while retaining the AT structure of the torque converter, ensuring smoothness while effectively improving power and reducing fuel consumption.

[0054] Please see Figure 2 , Figure 2 This is a flow chart of a longitudinal hybrid transmission control method provided in the second embodiment of the present application. The second embodiment of the present application provides a longitudinal hybrid transmission control method, which is applied to the longitudinal hybrid transmission system as described in the first embodiment of the present application, and specifically includes:

[0055] 100. When the transmission operates in the engine direct drive and electric drive power generation mode, the first clutch and the second clutch are closed, and the power of the engine is sequentially transmitted to the planetary gear shift module through the hybrid module, the first clutch, and the torque converter, and then transmitted to the wheel end through the planetary gear shift module. The power of the engine drives the motor rotor through the first planetary gear mechanism to drive the motor to generate electricity.

[0056] 200. When the transmission operates in a combined engine and motor drive mode, the first clutch and the second clutch are closed, and the power of the engine is sequentially transmitted to the planetary gear shift module through the hybrid module, the first clutch, and the torque converter, and the motor rotor transmits the driving force generated by the motor to the planetary gear shift module through the first planetary gear mechanism, and transmits power to the wheel end through the planetary gear shift module.

[0057] 300. When the transmission operates in the motor-only drive mode, the first clutch is closed and the second clutch is disconnected. The motor rotor transmits the driving force generated by the motor to the planetary gear shift module through the first planetary gear mechanism, and transmits the power to the wheel end through the planetary gear shift module.

[0058] 400. When the transmission operates in electric drive and power generation mode, the first clutch is disconnected and the second clutch is closed, and the power of the engine drives the motor rotor through the first planetary gear mechanism to drive the motor to generate electricity.

[0059] In some embodiments, when the wheel end obtains power, the method further includes:

[0060] Please refer to Figure 3 When the first shift element, the second shift element, and the fourth shift element are closed, the seventh shaft is locked, the first input shaft and the seventh shaft are at the same speed, power is input through the first input shaft and drives the third output shaft through the fifth planetary gear mechanism, and a first forward gear mode is obtained.

[0061] When the first shift element, the second shift element and the third shift element are closed, the fourth shaft and the seventh shaft are locked, the second shaft and the fifth shaft are at the same speed, power is input through the first input shaft and passes through the third planetary gear mechanism and the fifth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a second forward gear mode.

[0062] It can be understood that the second shaft and the fifth shaft have the same speed, that is, the rotational speeds of the second shaft and the fifth shaft are synchronized.

[0063] When the second shift element, the third shift element and the fourth shift element are closed, the first shaft, the second shaft, the fourth shaft and the fifth shaft are at the same speed, power is input through the first input shaft and passes through the second planetary gear mechanism and the fifth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a third forward gear mode.

[0064] When the second shift element, the third shift element and the fifth shift element are closed, the second shaft, the third shaft and the sixth shaft are at the same speed, power is input through the first input shaft and passes through the second planetary gear mechanism and the third planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a fourth forward gear mode.

[0065] When the second shift element, the fourth shift element and the fifth shift element are closed, the first shaft and the second shaft are at the same speed, the third shaft and the sixth shaft are at the same speed, power is input through the first input shaft and passes through the second planetary gear mechanism, the third planetary gear mechanism, the fourth planetary gear mechanism and the fifth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a fifth forward gear mode.

[0066] When the third shift element, the fourth shift element, and the fifth shift element are closed, power directly drives the third output shaft through the first input shaft, thereby obtaining a sixth forward gear mode.

[0067] When the first shift element, the fourth shift element and the fifth shift element are closed, the fourth shaft is locked, the first shaft and the seventh shaft are at the same speed, the third shaft and the sixth shaft are at the same speed, power is input through the first input shaft and passes through the third planetary gear mechanism and the fourth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining the seventh forward gear mode.

[0068] When the first shift element, the third shift element and the fifth shift element are closed, the fourth shaft is locked, the second shaft, the third shaft, the fifth shaft and the sixth shaft are at the same speed, power is input through the first input shaft and drives the third output shaft through the third planetary gear mechanism, thereby obtaining the eighth forward gear mode.

[0069] In some embodiments, when the wheel end obtains power, the method further includes:

[0070] Please refer to Figure 3 When the first shift element, the second shift element, and the fifth shift element are closed, the fourth shaft and the seventh shaft are locked, the third shaft and the sixth shaft are at the same speed, power is input through the first input shaft and passes through the third planetary gear mechanism and the fourth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a reverse gear (R) mode.

[0071] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0072] In addition, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0073] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0074] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A longitudinal hybrid transmission system, characterized in that: The system is arranged in a transmission housing, and includes a hybrid module, a first clutch, a torque converter and a planetary gear shift module connected in sequence through a first input shaft; the hybrid module includes a second clutch, a first planetary gear mechanism and a motor; the second clutch is connected to the engine through the first input shaft, the planetary carrier of the first planetary gear mechanism is connected to the second clutch and the planetary carrier of the first planetary gear mechanism is connected to the first clutch through the first input shaft, and the ring gear of the first planetary gear mechanism is connected to the motor rotor; the planetary gear shift module is connected to the wheel end through a third output shaft, and the first input shaft and the third output shaft are coaxially arranged.

2. The longitudinal hybrid transmission system according to claim 1, characterized in that: The planetary gear shift module includes a planetary gear set and a clutch shift element, and the planetary gear set is connected to the clutch shift element through a shaft set.

3. The longitudinal hybrid transmission system according to claim 2, characterized in that: The planetary gear set includes a second planetary gear mechanism, a third planetary gear mechanism, a fourth planetary gear mechanism, and a fifth planetary gear mechanism.

4. The longitudinal hybrid transmission system according to claim 3, characterized in that: The second planetary gear mechanism, the third planetary gear mechanism, the fourth planetary gear mechanism, and the fifth planetary gear mechanism are sequentially connected in series.

5. The longitudinal hybrid transmission system according to claim 3, characterized in that: The clutch shifting element includes a first shifting element, a second shifting element, a third shifting element, a fourth shifting element, and a fifth shifting element; the shaft group includes the first input shaft, the second shaft, the third output shaft, the fourth shaft, the fifth shaft, the sixth shaft, and the seventh shaft; the first shifting element is connected to the second shifting element, and the third shifting element is connected to the fourth shifting element via the second shaft; The ring gear of the second planetary gear mechanism is connected to the second shift element, the planet carrier is connected to the ring gear of the fifth planetary gear mechanism, and the sun gear is connected to the first shift element and the sun gear of the third planetary gear mechanism through the fourth shaft; the ring gear of the third planetary ring gear mechanism is connected to the sun gear of the fourth planetary ring gear mechanism through the fifth shaft, and the planet carrier is connected to the fourth shift element through the first input shaft; the ring gear of the fourth planetary ring gear mechanism is connected to the third shift element through the second shaft, and the planet carrier is connected to the fifth shift element through the sixth shaft; the planet carrier of the fifth planetary ring gear mechanism is connected to the fifth shift element through the sixth shaft, and the sun gear is connected to the fourth shift element through the second shaft.

6. The longitudinal hybrid transmission system according to claim 3, characterized in that: The planetary gears and the ring gear of the planetary gear set are in a mutually meshing relationship, and the ring gear and the sun gear are in a mutually meshing relationship; the second planetary gear mechanism, the third planetary gear mechanism, the fourth planetary gear mechanism and the fifth planetary gear mechanism are coaxially arranged side by side on the axis formed by the first input shaft and the third output shaft.

7. The longitudinal hybrid transmission system according to claim 5, characterized in that: Lubricating shift control oil passages are provided inside the first input shaft and the third output shaft and on the housing. The lubricating shift control oil passages, the oil pump and the control valve block form a hydraulic system. The hydraulic system is used to open or close the clutch shift element to switch gears.

8. A longitudinal hybrid transmission control method, characterized in that: The longitudinal hybrid transmission system according to any one of claims 1 to 7 is implemented, specifically comprising: When the transmission operates in the engine direct drive and electric drive power generation mode, the first clutch and the second clutch are closed, and the power of the engine is sequentially transmitted to the planetary gear shift module through the hybrid module, the first clutch, and the torque converter, and then transmitted to the wheel end through the planetary gear shift module. The power of the engine drives the motor rotor through the first planetary gear mechanism to drive the motor to generate electricity; When the transmission operates in a combined engine and motor drive mode, the first clutch and the second clutch are closed, and the power of the engine is sequentially transmitted to the planetary gear shift module through the hybrid module, the first clutch, and the torque converter. The motor rotor transmits the driving force generated by the motor to the planetary gear shift module through the first planetary gear mechanism, and the power is then transmitted to the wheel end through the planetary gear shift module. When the transmission is operated in the motor-only drive mode, the first clutch is closed and the second clutch is open, and the motor rotor transmits the driving force generated by the motor to the planetary gear shift module through the first planetary gear mechanism, and transmits the power to the wheel end through the planetary gear shift module; When the transmission operates in an electric drive and power generation mode, the first clutch is disconnected and the second clutch is closed, and the power of the engine drives the motor rotor through the first planetary gear mechanism to drive the motor to generate electricity.

9. The longitudinal hybrid transmission control method according to claim 8, characterized in that: When the wheel end obtains power, the method further includes: When the first shift element, the second shift element, and the fourth shift element are closed, the seventh shaft is locked, the first input shaft and the seventh shaft are at the same speed, power is input through the first input shaft and drives the third output shaft through the fifth planetary gear mechanism, thereby obtaining a first forward gear mode; When the first shift element, the second shift element, and the third shift element are closed, the fourth shaft and the seventh shaft are locked, the second shaft and the fifth shaft are at the same speed, and power is input through the first input shaft and drives the third output shaft through the third planetary gear mechanism and the fifth planetary gear mechanism, thereby obtaining a second forward gear mode; When the second, third, and fourth shift elements are closed, the first, second, fourth, and fifth shafts are driven at the same speed, and power is input through the first input shaft and driven by the second and fifth planetary gear mechanisms to jointly drive the third output shaft, thereby achieving a third forward gear mode. When the second, third, and fifth shift elements are closed, the second, third, and sixth shafts are driven at the same speed, and power is input through the first input shaft and driven by the second and third planetary gear mechanisms to drive the third output shaft, thereby achieving a fourth forward gear mode. When the second shift element, the fourth shift element, and the fifth shift element are closed, the first shaft and the second shaft are at the same speed, the third shaft and the sixth shaft are at the same speed, power is input through the first input shaft and passes through the second planetary gear mechanism, the third planetary gear mechanism, the fourth planetary gear mechanism, and the fifth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a fifth forward gear mode; When the third shift element, the fourth shift element, and the fifth shift element are closed, power directly drives the third output shaft through the first input shaft, thereby obtaining a sixth forward gear mode; When the first shift element, the fourth shift element, and the fifth shift element are closed, the fourth shaft is locked, the first shaft and the seventh shaft are at the same speed, and the third shaft and the sixth shaft are at the same speed, power is input through the first input shaft and passes through the third planetary gear mechanism and the fourth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a seventh forward gear mode; When the first shift element, the third shift element and the fifth shift element are closed, the fourth shaft is locked, the second shaft, the third shaft, the fifth shaft and the sixth shaft are at the same speed, power is input through the first input shaft and drives the third output shaft through the third planetary gear mechanism, thereby obtaining the eighth forward gear mode.

10. The longitudinal hybrid transmission control method according to claim 9, characterized in that: When the wheel end obtains power, the method further includes: When the first shift element, the second shift element and the fifth shift element are closed, the fourth shaft and the seventh shaft are locked, the third shaft and the sixth shaft are at the same speed, power is input through the first input shaft and passes through the third planetary gear mechanism and the fourth planetary gear mechanism to jointly drive the third output shaft, thereby obtaining a reverse gear mode.

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