Hybrid power transmission of vehicle, power system and vehicle

Abstract

The utility model discloses a hybrid power transmission of a vehicle, a power system and the vehicle. The hybrid power transmission of the vehicle comprises a first clutch with a first input shaft; the first speed reducer comprises a power synthesis shaft, and the first input shaft is selectively connected with the power synthesis shaft; the hydraulic torque converter comprises a hydraulic torque converter pump wheel, a hydraulic torque converter turbine, a hydraulic torque converter lock-up clutch, a pump wheel shaft and a turbine shaft sleeve, the hydraulic torque converter pump wheel is connected with the power synthesis shaft, and the hydraulic torque converter lock-up clutch selectively connects the hydraulic torque converter pump wheel with the hydraulic torque converter turbine; the planetary gear mechanism comprises a sun gear, a planet carrier, a planetary gear and a large gear ring, the sun gear is coaxially connected with the pump wheel shaft and the power synthesis shaft, the large gear ring is connected with the turbine shaft sleeve, all functions needed by the hybrid power vehicle are achieved only through one motor and one engine, and a power assembly is more simplified.

Description

Technical Field

[0001] The utility model relates to the field of hybrid power vehicles, in particular to a hybrid power transmission, a power system and a vehicle. Background Art

[0002] my country's new energy vehicle technology has achieved rapid development in recent years. How to further improve the technical level of new energy vehicle powertrain and enable new energy vehicles to continue to develop healthily and rapidly has become a key issue that needs to be addressed in the automotive field.

[0003] Currently, the hybrid models that have been successful in the Chinese market are all plug-in hybrid vehicles, a typical representative of which is BYD. For example, patent document CN220615468U discloses a hybrid transmission, power system and vehicle.

[0004] The hybrid transmission of the vehicle includes: a clutch assembly, a generator, a first planetary gear, a drive motor and a second planetary gear. This hybrid solution can not only decouple the engine and the generator, realize the pure electric generator drive of the power system and the vehicle, and the generator drive motor dual motor drive, improve the motor power utilization and vehicle power performance, but also reduce the shaft system in the power system, reduce the size of the power system, and improve the volume power density of the power system and the compactness of the vehicle structure.

[0005] The shortcomings of the hybrid drive device can be summarized into the following three points: First, the internal combustion engine drive mode is only used at higher speeds, and the engine cannot be directly driven at low speeds and starting; second, two motors are used, one is mainly used for driving and the other is mainly used for power generation, and the structure is complex; third, during pure electric driving, the output torque of the motor is reduced by a fixed speed ratio, and the output torque is limited, and the torque is too small for pure electric starting. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the defects of the hybrid power drive device in the prior art, that is, the monotonous working mode and low conversion efficiency, and to provide a hybrid power transmission, a power system and a vehicle.

[0007] The utility model adopts a technical solution to solve its technical problem. A hybrid transmission of a vehicle includes a first clutch, the first clutch has a first input shaft; a first reducer, the first reducer includes a first transmission gear and a second transmission gear meshing with each other, a power synthesis shaft coaxially rotates on the first transmission gear, and the first input shaft is selectively engaged with the power synthesis shaft, and a second input shaft coaxially rotates on the second transmission gear; a torque converter, including a torque converter pump wheel, a torque converter turbine, a torque converter lockup clutch, a pump wheel shaft, and a turbine sleeve, the torque converter pump wheel is connected to the power synthesis shaft Together, the torque converter lockup clutch selectively engages the pump wheel of the torque converter with the turbine of the torque converter; a planetary gear mechanism, the planetary gear mechanism includes a sun gear, a planetary carrier, planetary gears, and a large ring gear, the sun gear is coaxially connected to the pump wheel shaft and the power synthesis shaft, and the large ring gear is connected to the turbine sleeve; a main reducer, the main reducer includes a third transmission gear and an intermediate shaft, and the intermediate shaft rotates coaxially with the planetary carrier; a differential, the differential includes a fourth transmission gear and an output half shaft, the fourth transmission gear is meshed with the third transmission gear for transmission, so that power is output from the output half shaft to the wheels.

[0008] Furthermore, when the torque converter locking clutch is locked, the torque converter pump wheel is engaged with the torque converter turbine, and the planetary gear mechanism sun gear is also locked with the planetary gear mechanism large ring gear and the planetary carrier. At this time, the hybrid transmission is in a direct transmission state, and the torque input from the power synthesis shaft is directly output to the planetary carrier.

[0009] Furthermore, when the torque converter lockup clutch is unlocked, the hybrid transmission is in a split torque state, achieving continuous speed and torque changes on the input speed and torque of the slave power synthesis shaft, and then outputting them to the planetary carrier.

[0010] The utility model further solves its technical problem by adopting a technical solution of a vehicle power system, including an engine, the output end of the engine is connected to the first clutch input end through a first input shaft; a drive motor, the output end of the drive motor is connected to the second transmission gear through a second input shaft; and a hybrid transmission of the above-mentioned vehicle.

[0011] Furthermore, the drive motor and the engine drive the vehicle individually or together.

[0012] In summary, the utility model has the following beneficial technical effects:

[0013] The power system of the hybrid vehicle of the present invention includes an engine, a drive motor, and a hybrid transmission. Only one motor and one engine are used to achieve various functions required by the hybrid vehicle. Currently, extended-range electric vehicles and plug-in hybrid vehicles both require two motors, one of which is mainly used for power generation and the other is mainly used for driving. Compared with the powertrains of these new energy vehicles, the hybrid system of the present invention is simpler, easier to control, and also improves the reliability of the system.

[0014] When the torque converter is unlocked, the speed of the power synthesis shaft is decoupled from the vehicle speed, and the vehicle can adopt the engine drive mode in the entire speed range from starting to high-speed driving. This is superior to some models where the engine drive mode is only limited to high-speed driving.

[0015] There are two working conditions in which the engine and the drive motor jointly drive the vehicle: hybrid direct drive and hybrid torque drive. The hybrid direct drive is used for conditions with higher vehicle speeds, and the hybrid torque drive is used for conditions with lower vehicle speeds. The hybrid torque drive condition at lower vehicle speeds enhances the vehicle's starting, rapid acceleration and hill climbing capabilities.

[0016] When driving purely electric, if there is a large torque demand, the torque converter is unlocked, the motor speed is decoupled from the vehicle speed, and the drive motor torque is converted to drive the vehicle. This can prevent the drive motor from operating in a maximum torque output state similar to "stall", avoid motor overheating, and benefit the motor life.

[0017] The motor output torque enters the power synthesis shaft after deceleration and torque boost. This has two advantages: first, it increases the input torque of the power synthesis shaft; second, it prevents the torque converter pump wheel from operating at too high a speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a power system embodiment of a vehicle of the utility model;

[0019] Figure 2 It is a schematic diagram of a torque converter lock-up clutch engagement in a power system embodiment of a vehicle of the utility model;

[0020] Figure 3 It is a schematic diagram of a power system embodiment of a vehicle of the utility model, in which a first clutch is engaged and a torque converter lockup clutch is disengaged;

[0021] Figure 4 It is a schematic diagram of a power system embodiment of a vehicle of the utility model, in which a first clutch is engaged and a torque converter lock-up clutch is engaged;

[0022] Figure 5It is a schematic diagram of the overall structure of a hybrid transmission and a power system of a vehicle of the utility model;

[0023] Figure 6 It is a schematic diagram of the overall structure of a power system embodiment 2 of a vehicle of the utility model.

[0024] Description of reference numerals:

[0025] 1000. Powertrain; 100. Hybrid transmission; 10. Engine;

[0026] 20. Drive motor; 21. Drive motor rotor; 22. Drive motor stator;

[0027] 30. First clutch; 31. First input shaft;

[0028] 40. first speed reducer; 41. first transmission gear; 42. second transmission gear; 43. power synthesis shaft; 44. second input shaft;

[0029] 50. torque converter; 51. torque converter pump wheel; 52. torque converter turbine; 53. torque converter lock-up clutch; 54. torque converter pump wheel shaft; 55. torque converter turbine sleeve;

[0030] 60. Planetary gear mechanism; 61. Sun gear; 62. Planet carrier; 63. Planetary gear; 64. Ring gear;

[0031] 70. Main reducer; 71. Third transmission gear; 72. Intermediate shaft;

[0032] 80. Differential; 81. Fourth transmission gear; 82. Output half shaft. DETAILED DESCRIPTION

[0033] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] Reference Figure 1 In the embodiment of the present invention, the hybrid transmission 100 of the vehicle is arranged in a power system 1000 , and the power system 1000 also includes an engine 10 and a drive motor 20 .

[0035] The hybrid transmission 100 includes a first clutch 30, a first speed reducer 40, a torque converter 50, a planetary gear mechanism 60, a final speed reducer 70, and a differential 80. The first clutch 30 has a first input shaft 31; the first speed reducer 40 includes a first transmission gear 41 and a second transmission gear 42 meshing with each other, a power combining shaft 43 coaxially rotating on the first transmission gear 41, and the first input shaft 31 is selectively engaged with the power combining shaft 43, and a second input shaft 44 coaxially rotating on the second transmission gear 42.

[0036] The crankshaft output end of the engine 10 is connected to the first input shaft 31 of the hybrid transmission 100 of the vehicle, so that the power output of the engine 10 can be transmitted to the hybrid transmission 100, thereby enabling the hybrid transmission 100 to change the speed and transmit the output power of the engine 10. In addition, the drive motor 20 is composed of a drive motor rotor 21 and a drive motor stator 22, and the output end of the drive motor rotor 21 is connected to the second input shaft 44 of the hybrid transmission 100 of the vehicle, so that the power output of the drive motor 20 can be transmitted to the hybrid transmission 100, thereby enabling the hybrid transmission 100 to change the speed and transmit the output power of the drive motor 20.

[0037] The output torque of the engine 10 is transmitted to the power synthesis shaft 43 after passing through the clutch, and the output torque of the drive motor 20 can also be transmitted to the power synthesis shaft 43 after passing through the first reducer 40. By engaging and disconnecting the connection between the first clutch 30 and the engine 10, the output torque of the engine 10 can be transmitted or disconnected to the power synthesis shaft 43 via the first input shaft 31, so the switching between the electric mode of the whole vehicle and the driving mode of the engine 10 can be realized by controlling the engagement or disconnection of the first clutch 30.

[0038] The output torque of the engine 10 is transmitted to the power synthesis shaft 43 through the first clutch 30, and the output torque of the drive motor 20 is transmitted to the second transmission gear 42 through the second input shaft 44, and then transmitted to the first transmission gear 41 through gear meshing transmission. The gear shaft of the first transmission gear 41 is connected with the power synthesis shaft 43. In addition, the diameter of the second transmission gear 42 is smaller than that of the first transmission gear 41. Therefore, the output torque of the drive motor 20 is transmitted to the power synthesis shaft 43 after deceleration and torque increase. When the first clutch 30 engages the output torque of the engine 10, the output torque of the engine 10 and the output torque of the drive motor 20 complete power coupling on the power synthesis shaft 43.

[0039] The torque converter 50 includes a torque converter pump wheel 51, a torque converter turbine 52, a torque converter lockup clutch 53, a torque converter pump wheel shaft 54, and a torque converter turbine sleeve 55. The torque converter lockup clutch 53 selectively engages the torque converter pump wheel 51 with the torque converter turbine 52. The planetary gear mechanism 60 includes a sun gear 61, a planetary carrier 62, a planetary gear 63, and a large ring gear 64. The power synthesis shaft 43 is connected to the torque converter pump wheel 51, one end of the torque converter pump wheel shaft 54 ​​is coaxial with the power synthesis shaft 43, and the other end of the torque converter pump wheel shaft 54 ​​is connected to the sun gear 61 of the planetary gear mechanism 60. The torque converter turbine 52 is connected to the large ring gear 64 of the planetary gear mechanism 60 through the torque converter turbine sleeve 55. In addition, the main reducer 70 includes a third transmission gear 71 and an intermediate shaft 72, and the intermediate shaft 72 rotates coaxially with the planetary carrier 62; the differential 80 includes a fourth transmission gear 81 and an output half shaft 82, and the fourth transmission gear 81 is meshed with the third transmission gear 71 for transmission, so that power is output from the output half shaft 82 to the wheels, and the diameter of the third transmission gear 71 is smaller than the diameter of the fourth transmission gear 81.

[0040] Therefore, when the torque converter lock clutch 53 is locked, that is, the torque converter pump wheel 51 and the torque converter turbine 52 are engaged together, because the torque converter pump wheel 51 is connected to the sun gear 61 of the planetary gear mechanism 60 through the power synthesis shaft 43, and the torque converter turbine 52 is connected to the large ring gear 64 of the planetary gear mechanism 60 through the torque converter turbine sleeve 55, the torque converter pump wheel 51 and the torque converter turbine 52 are locked together, and the sun gear 61 and the large ring gear 64 of the planetary gear mechanism 60 are locked together. The sun gear 61, the large ring gear 64 and the planetary carrier 62 of the planetary gear mechanism 60 are locked together as a whole and rotate at the same speed. The torque transmitted to the power synthesis shaft 43 will be directly transmitted to the planetary carrier 62, and transmitted to the main reducer 70 and the differential 80 through the intermediate shaft 72, so as to drive the vehicle to travel.

[0041] When the torque converter lockup clutch 53 is unlocked, the torque transmitted to the power synthesis shaft 43 will be divided into two parts; one part of the torque is transmitted to the torque converter pump wheel 51, and after hydraulic torque conversion, it is output from the torque converter turbine 52 and transmitted to the large ring gear 64 of the planetary gear mechanism 60. The other part of the torque is directly transmitted to the sun gear 61 of the planetary gear mechanism 60. The two parts of the torque are synthesized in the planetary gear mechanism 60 and output from the planetary carrier 62, and transmitted to the main reducer 70 and the differential 80 through the intermediate shaft 72 to drive the vehicle.

[0042] As shown in Table 1, the control strategy, power transmission and applicable vehicle operating conditions under different working modes of the power system in the present invention are described.

[0043] Table 1 Control strategies of power system in different working modes

[0044]

[0045] Reference Figure 1 As shown, when the remaining power of the vehicle battery is high and the required torque for driving the vehicle is large, the power system 1000 operates in a pure electric torque conversion drive mode. That is, the engine 10 does not work, the drive motor 20 works, the first clutch 30 is disconnected, and the torque converter lock clutch 53 is disconnected. The output torque of the drive motor 20 is transmitted to the power synthesis shaft 43 after deceleration and torque increase through the first reducer 40, and then transmitted to the planetary carrier 62 of the planetary gear mechanism 60 after speed change and torque conversion, and then output to the main reducer 70 for deceleration and torque increase, and then the vehicle is driven to travel, and the torque for driving the vehicle is large. When the torque required during pure electric driving is greater than the maximum torque that the motor can directly output, this mode is used to change the speed and torque of the motor torque to meet the requirements of the driving torque. Typical applications are when the vehicle speed is low, the vehicle climbs a larger slope in a pure electric state, or there is a greater acceleration demand when driving in pure electric mode.

[0046] Reference Figure 2 As shown, when the remaining power of the vehicle battery is high and the required torque for driving the vehicle is small, the power system 1000 operates in a pure electric direct drive mode. That is, the engine 10 does not work, the drive motor 20 works, the first clutch 30 is disconnected, and the torque converter lock clutch 50 is engaged. The output torque of the drive motor 20 is transmitted to the power synthesis shaft 43 after being decelerated and increased by the first reducer 40, and then directly transmitted to the planetary carrier 62 of the planetary gear mechanism 60, and then output to the main reducer 70 to decelerate and increase the torque, and then drive the vehicle to travel, with high transmission efficiency. Typical applications are uniform speed driving, small acceleration driving, and small slope driving.

[0047] Reference Figure 3 As shown, when the remaining power of the vehicle battery is low and the vehicle speed is low, the engine 10 works, the first clutch 30 is engaged, the torque converter lock clutch 53 is disconnected, and the engine 10 outputs torque at the working point with the lowest fuel consumption rate at the current speed. If the output torque of the engine 10 is equal to the required torque required to drive the vehicle, the drive motor 20 works in an idling state. The torque of the engine 10 is transmitted to the power synthesis shaft 43, and then transmitted to the planetary carrier 62 of the planetary gear mechanism 60 after speed change and torque conversion, and then output to the main reducer 70 to reduce speed and increase torque, and then drive the vehicle to travel. At this time, the power system 1000 works in the engine 10 torque conversion drive mode.

[0048] Reference Figure 3As shown, when the remaining power of the vehicle battery is low and the vehicle speed is low, the engine 10 works, the first clutch 30 is engaged, the torque converter lock clutch 53 is disconnected, and the engine 10 outputs torque at the working point with the lowest fuel consumption rate at the current speed. If the output torque of the engine 10 is greater than the required torque required to drive the vehicle, the excess torque is used for power generation, and the drive motor 20 works in the power generation state. The torque of the engine 10 and the drive motor 20 is transmitted to the power synthesis shaft 43, and then transmitted to the planetary carrier 62 of the planetary gear mechanism 60 after speed change and torque conversion, and then output to the main reducer 70 to reduce speed and increase torque, and then drive the vehicle to travel. At this time, the power system 1000 works in the low-speed driving power generation mode.

[0049] Reference Figure 3 As shown, when the remaining power of the vehicle battery is low and the vehicle speed is low, the engine 10 works, the first clutch 30 is engaged, the torque converter lock clutch 53 is disconnected, and the engine 10 outputs torque at the working point with the lowest fuel consumption rate at the current speed. If the output torque of the engine 10 is less than the required torque required to drive the vehicle, the insufficient torque is supplemented by the drive motor 20, and the drive motor 20 works in an electric state. The torque of the engine 10 and the drive motor 20 is transmitted to the power synthesis shaft 43, and then transmitted to the planetary carrier 62 of the planetary gear mechanism 60 after speed change and torque conversion, and then output to the main reducer 70 to reduce speed and increase torque, and then drive the vehicle to travel. At this time, the power system 1000 works in the hybrid torque conversion drive mode.

[0050] Reference Figure 4 As shown, when the remaining power of the vehicle battery is low and the vehicle speed is high, the engine 10 works, the first clutch 30 is engaged, the torque converter lock clutch 53 is engaged, and the engine 10 outputs torque at the working point with the lowest fuel consumption rate at the current speed. If the output torque of the engine 10 is equal to the required torque required to drive the vehicle, the drive motor 20 works in an idling state. The output torque of the engine 10 is transmitted to the power synthesis shaft 43, and then directly transmitted to the planetary carrier 62 of the planetary gear mechanism 60, and then output to the main reducer 70 to reduce speed and increase torque, and then drive the vehicle to travel. The power system 1000 works in the engine 10 direct drive mode.

[0051] Reference Figure 4As shown, when the remaining power of the vehicle battery is low and the vehicle speed is high, the engine 10 works, the first clutch 30 is engaged, the torque converter lock clutch 53 is engaged, and the engine 10 outputs torque at the working point with the lowest fuel consumption rate at the current speed. If the output torque of the engine 10 is greater than the required torque required to drive the vehicle, the excess torque is used for power generation, and the drive motor 20 works in the power generation state. The torque of the engine 10 and the drive motor 20 is transmitted to the power synthesis shaft 43, and then directly transmitted to the planetary carrier 62 of the planetary gear mechanism 60, and then output to the main reducer 70 to reduce speed and increase torque, and then drive the vehicle to travel. The power system 1000 works in a high speed driving power generation mode.

[0052] Reference Figure 4 As shown, when the remaining power of the vehicle battery is low and the vehicle speed is high, the engine 10 works, the first clutch 30 is engaged, the torque converter lock clutch 53 is engaged, and the engine 10 outputs torque at the working point with the lowest fuel consumption rate at the current speed. If the output torque of the engine 10 is less than the required torque required to drive the vehicle, the insufficient torque is supplemented by the drive motor 20, and the drive motor 20 works in an electric state. The torque of the engine 10 and the drive motor 20 is transmitted to the power synthesis shaft 43, and then directly transmitted to the planetary carrier 62 of the planetary gear mechanism 60, and then output to the main reducer 70 to reduce speed and increase torque, and then drive the vehicle to travel. The power system 1000 works in a hybrid direct drive mode.

[0053] Reference Figure 2 As shown, when the required power for driving the vehicle is negative, if the torque converter lockup clutch 53 is engaged, the speed of the drive motor 20 is also higher than the minimum speed for power generation, and the power system 1000 operates in the braking energy recovery mode.

[0054] Reference Figure 3 As shown, when the remaining power of the vehicle battery is high, the vehicle speed is low and the required torque for driving the vehicle is very large, the power system 1000 operates in the hybrid torque conversion drive mode. That is, the engine 10 is working, the drive motor 20 is working, the first clutch 30 is engaged, and the torque converter lock clutch 53 is disconnected. The output torque of the drive motor 20 is transmitted to the power synthesis shaft 43 after deceleration and torque increase through the first reducer 40. The torque of the engine 10 is also transmitted to the power synthesis shaft 43 through the clutch. The speed torque of the power synthesis shaft 43 is transmitted to the planetary carrier 62 of the planetary gear mechanism 60 after speed and torque change, and then output to the main reducer 70 for deceleration and torque increase, and then the vehicle is driven to travel. The torque for driving the vehicle to travel is close to the upper limit of the maximum output capacity, and the vehicle obtains a large acceleration. Typical application scenarios are low-speed rapid acceleration and low-speed steep slope climbing.

[0055] Reference Figure 4As shown, when the remaining power of the vehicle battery is high, the vehicle speed is high and the required torque for driving the vehicle is very large, the power system 1000 operates in the hybrid direct drive mode. The engine 10 operates, the drive motor 20 operates, the first clutch 30 is engaged, and the torque converter lock clutch 53 is engaged. The output torque of the drive motor 20 is transmitted to the power synthesis shaft 43 after being decelerated and increased by the first reducer 40. The torque of the engine 10 is also transmitted to the power synthesis shaft 43 through the clutch. The speed torque of the power synthesis shaft 43 is directly transmitted to the planetary carrier 62 of the planetary gear mechanism 60, and then output to the main reducer 70 for deceleration and increase of torque, and then the vehicle is driven to travel. The torque for driving the vehicle to travel is close to the upper limit of the maximum output capacity, and the vehicle obtains a large acceleration. Typical application scenarios include overtaking on a highway, climbing a slope at a higher speed, etc.

[0056] Reference Figure 6 As shown, in another embodiment, the planetary gear mechanism 60 can be arranged on the left side of the torque converter 50 in the power system 1000 of the vehicle, and the lock clutch of the torque converter 50 can be replaced by a clutch between the planet carrier 62 and the large ring gear 64, which can also achieve the same effect. Such an arrangement can reduce the manufacturing difficulty of the hybrid transmission 100.

[0057] The above are all preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereto. Among them, the same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. Therefore: All equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A hybrid transmission for a vehicle, characterized in that: The invention comprises a first clutch (30), wherein the first clutch (30) has a first input shaft; A first speed reducer (40), the first speed reducer (40) comprising a first transmission gear (41) and a second transmission gear (42) meshing with each other, a power synthesis shaft (43) coaxially rotating on the first transmission gear (41), and the first input shaft (31) selectively engaging with the power synthesis shaft (43), and a second input shaft (44) coaxially rotating on the second transmission gear (42); A hydraulic torque converter (50), comprising a hydraulic torque converter pump wheel (51), a hydraulic torque converter turbine (52), a hydraulic torque converter lockup clutch (53), a pump wheel shaft (54), and a turbine shaft sleeve (55), wherein the hydraulic torque converter pump wheel (51) is connected to a power synthesis shaft (43), and the hydraulic torque converter lockup clutch (53) selectively engages the hydraulic torque converter pump wheel (51) with the hydraulic torque converter turbine (52); A planetary gear mechanism (60), the planetary gear mechanism (60) comprising a sun gear (61), a planet carrier (62), planetary gears (63), and a large ring gear (64), the sun gear (61) being coaxially connected to the pump wheel shaft (54) and the power synthesis shaft (43), and the large ring gear (64) being connected to the turbine shaft sleeve (55); A main reducer (70), the main reducer (70) comprising a third transmission gear (71) and an intermediate shaft (72), the intermediate shaft (72) rotating coaxially with the planet carrier (62); A differential (80), the differential (80) comprising a fourth transmission gear (81) and an output half shaft (82), the fourth transmission gear (81) meshing with the third transmission gear (71) for transmission, so that power is output from the output half shaft (82) to wheels.

2. The hybrid transmission of a vehicle according to claim 1, characterized in that: When the torque converter lock clutch (53) is locked, the torque converter pump wheel (51) is engaged with the torque converter turbine (52), and the planetary gear mechanism sun gear (61) is also locked with the planetary gear mechanism ring gear (64) and the planet carrier (62). At this time, the hybrid transmission is in a direct transmission state, and the torque input from the power synthesis shaft (43) is directly output to the planet carrier (62).

3. The hybrid transmission of a vehicle according to claim 1, characterized in that: When the torque converter lock clutch (53) is unlocked, the hybrid transmission is in a split torque state, achieving continuous speed and torque changes on the input speed and torque of the slave power synthesis shaft (43), and then outputting them to the planetary carrier (62).

4. A power system for a vehicle, characterized in that: It comprises an engine (10), wherein the output end of the engine (10) is connected to the input end of the first clutch (30) via a first input shaft (31); A drive motor (20), wherein an output end of the drive motor (20) is connected to a second transmission gear (42) via a second input shaft (44); A hybrid transmission (100) for a vehicle as claimed in any one of claims 1 to 3.

5. A vehicle power system according to claim 4, characterized in that: The driving motor (20) and the engine (10) drive the vehicle to travel independently or together.

6. A vehicle, characterized in that: include: The power system (1000) of the vehicle as claimed in claim 5.

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