Hybrid drive system and vehicle

Abstract

The application provides a hybrid power driving system and a vehicle. The hybrid power driving system comprises a power assembly, a transmission assembly and a gear assembly. The power assembly comprises an engine, a first motor and a second motor. The transmission assembly comprises a first brake, a second brake, a first planetary gear set, a second planetary gear set and a first clutch. The gear assembly is arranged between the power assembly and the transmission assembly. The engine, the first motor, the first brake and the second brake are connected with the first planetary gear set. The second brake, the first clutch and the second motor are sequentially connected with at least one transmission shaft. The second planetary gear set is connected with a pair of wheels. Through the cooperation of the first planetary gear set and the second planetary gear set, the coupling of the two brakes and the clutch and the transmission of the gear assembly, the direction control and the mode switching of the power flow can be realized by arranging two motors, the structure of the hybrid power driving system is simplified, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more particularly to hybrid drive systems and vehicles. Background Technology

[0002] With increasingly severe environmental pollution, new energy vehicles have become an important direction for the automotive industry. Hybrid vehicles are currently a practical transitional technology. In hybrid drive systems, four-wheel drive systems offer superior vehicle power, handling stability, and off-road capability, making four-wheel drive hybrid systems a key focus of research and development for major automakers.

[0003] Existing hybrid vehicle powertrain architectures are mainly classified into four basic types: parallel, series, series-parallel, and power-split. Parallel architecture enables parallel drive, series architecture enables series drive, series-parallel architecture can achieve both parallel and series drive, and power-split architecture enables power-split drive. However, to achieve switching between multiple modes, existing hybrid drive systems have complex architectures or require three motors, resulting in complex structures and high manufacturing costs. Furthermore, existing hybrid drive systems typically only support one or two of the four drive modes, failing to integrate all four drive methods within a single system. This limits vehicle performance under various complex operating conditions, preventing the optimization of power and fuel economy.

[0004] Therefore, it is necessary to provide an improved hybrid drive system and vehicle to solve the above problems. Summary of the Invention

[0005] This application provides a hybrid drive system and vehicle with a simplified structure and low manufacturing cost.

[0006] This application provides a hybrid power drive system, including: a power component, a transmission component, and a gear assembly; the power component includes an engine, a first motor, and a second motor; the transmission component includes a first brake, a second brake, a first planetary gear set, a second planetary gear set, and a first clutch; the gear assembly is disposed between the power component and the transmission component; the engine, the first motor, the first brake, and the second brake are all connected to the first planetary gear set, the second brake, the first clutch, the second motor, and the second planetary gear set are sequentially connected to at least one drive shaft, and the second planetary gear set is connected to a pair of wheels.

[0007] Furthermore, both the first planetary gear set and the second planetary gear set include a planet carrier and two sun gears, two planet gears, an input shaft, a first output shaft, and a second output shaft disposed on the planet carrier; the input shaft is connected to the planet carrier in a transmission manner; the two sun gears mesh with the two planet gears, and the first output shaft and the second output shaft are respectively connected to the two sun gears and rotate coaxially.

[0008] Furthermore, the first motor is connected to the first output shaft of the first planetary gear set; the first brake is disposed on the first output shaft of the first planetary gear set; the second output shaft of the first planetary gear set is connected to the second brake and the first clutch; the first output shaft and the second output shaft of the second planetary gear set are respectively connected to the pair of wheels.

[0009] Furthermore, the gear assembly includes a first gear set, a second gear set, and a third gear set; the first gear set connects the engine to the input shaft of the first planetary gear set, the second gear set connects the second motor to the drive shaft, and the third gear set connects the drive shaft to the input shaft of the second planetary gear set.

[0010] Furthermore, the gear assembly also includes a fourth gear set, which is disposed between the first motor and the first output shaft of the first planetary gear set.

[0011] Furthermore, it also includes a gearbox, which is disposed on the drive shaft; the gearbox is disposed between the second brake and the second gear set or the third gear set.

[0012] Furthermore, the transmission assembly also includes a second clutch element, which connects the engine to the input shaft of the first planetary gear set.

[0013] Furthermore, the first clutch component and the second clutch component are clutches or synchronizers.

[0014] Furthermore, the different operating states of the engine, the first motor, and the second motor, combined with the locking or disengaging states of the first brake, the second brake, and the first clutch, form multiple operating modes; the multiple operating modes include parking power generation mode, pure electric mode, series mode, parallel mode, and power split mode.

[0015] This application also provides a vehicle including the hybrid drive system described above.

[0016] This application achieves power flow direction control and mode switching by using the cooperation of the first and second planetary gear sets, the coupling of two braking components and clutch components, and the transmission of gear components, thereby simplifying the structure of the hybrid drive system and reducing manufacturing costs. Attached Figure Description

[0017] Figure 1 This is a connection diagram of a hybrid drive system according to an exemplary embodiment of this application.

[0018] Figure 2 This is a perspective view of the planetary gear set of the hybrid power drive system of this application.

[0019] Figure 3 This is a connection diagram of another embodiment of the hybrid drive system of this application.

[0020] Figure 4 This is a connection diagram of another embodiment of the hybrid drive system of this application.

[0021] Figure 5 This is a connection diagram of another embodiment of the hybrid drive system of this application.

[0022] Figure 6 This is a connection diagram of the hybrid drive system in the parking power generation mode of this application.

[0023] Figure 7 This is a connection diagram of the hybrid drive system in pure electric mode according to this application.

[0024] Figure 8 This is a connection diagram of the hybrid drive system in series mode according to this application.

[0025] Figure 9 This is a connection diagram of the hybrid drive system in parallel mode according to this application.

[0026] Figure 10 This is a connection diagram of the hybrid drive system in the power split mode of this application.

[0027] Explanation of icon numbers: 10. Power assembly; 11. Engine; 12. First motor; 13. Second motor; 20. Transmission assembly; 21. First brake; 22. Second brake; 23. First planetary gear set; 20a. Planetary carrier; 20b. Sun gear; 20c. Planetary gear; 20d. Input shaft; 20e. First output shaft; 20f. Second output shaft; 24. Second planetary gear set; 25. First clutch; 26. Drive shaft; 27. Second clutch; 30. Gear assembly; 31. First gear set; 32. Second gear set; 33. Third gear set; 34. Fourth gear set; 40. Wheel; 50. Gearbox; 60. Power battery. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described herein with reference to the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0029] If any terms related to directional indication or positional relationship are used in the embodiments of this application, such terms are only used to explain the relative positional relationship and movement of the components in a specific posture; if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, terms such as "first" and "second" used in the embodiments of this application are only used for descriptive convenience and should not be construed as indicating or implying relative importance.

[0030] See Figure 1 As shown, this application provides a hybrid power drive system, including a power assembly 10, a transmission assembly 20, and a gear assembly 30. The gear assembly 30 is disposed between the power assembly 10 and the transmission assembly 20, and the power assembly 10 provides power to the vehicle through the transmission assembly 20 and the gear assembly 30.

[0031] According to embodiments of this application, the power assembly 10 includes an engine 11, a first motor 12, and a second motor 13. The transmission assembly 20 includes a first brake 21, a second brake 22, a first planetary gear set 23, a second planetary gear set 24, and a first clutch 25. The gear assembly 30 includes a first gear set 31, a second gear set 32, and a third gear set 33.

[0032] The engine 11, the first motor 12, the first brake 21, and the second brake 22 are all connected to the first planetary gear set 23. The second brake 22, the first clutch 25, the second motor 13, and the second planetary gear set 24 are sequentially connected to at least one drive shaft 26, and the second planetary gear set 24 is connected to a pair of wheels 40.

[0033] See Figure 2As shown, according to one embodiment of this application, the first planetary gear set 23 and the second planetary gear set 24 have the same architecture. The first planetary gear set 23 includes a planet carrier 20a and two sun gears 20b, two planet gears 20c, an input shaft 20d, a first output shaft 20e, and a second output shaft 20f disposed on the planet carrier 20a. The input shaft 20d is drivenly connected to the planet carrier 20a. The two sun gears 20b mesh with the two planet gears 20c. The two sun gears 20b are respectively connected to the first output shaft 20e and the second output shaft 20f and rotate coaxially. The motor 11 is drivenly connected to the input shaft 20d. The first motor 12 is connected to the first output shaft 20e of the first planetary gear set 23, and the second output shaft 20f of the first planetary gear set 23 is connected to the drive shaft 26.

[0034] The second planetary gear set 24 includes a planet carrier 20a and two sun gears 20b, two planet gears 20c, an input shaft 20d, a first output shaft 20e, and a second output shaft 20f mounted on the planet carrier 20a. The input shaft 20d is connected to the planet carrier 20a for transmission. The two sun gears 20b mesh with the two planet gears 20c. The first output shaft 20e and the second output shaft 20f are respectively connected to the two sun gears 20b and rotate coaxially.

[0035] Both the first planetary gear set 23 and the second planetary gear set 24 are equipped with a first output shaft and a second output shaft. This dual output shaft design, in conjunction with the first brake element 21, the second brake element 22, and the first clutch element 25, enables the hybrid drive system to precisely divide and control the power flow.

[0036] According to the embodiments of this application, both the engine 11 and the first motor 12 are connected to the first planetary gear set 23. The first motor 12 is connected to the first output shaft 20e of the first planetary gear set 23. The engine 11 is connected to the input shaft 20d of the first planetary gear set 23 via the first gear group 31. The first brake 21 is disposed on the first output shaft 20e. This application can directly and efficiently change the connection state between the first planetary gear set 23 and the first motor 12 by controlling the first brake 21, thereby switching the energy flow path of the entire system, with rapid response and clear logic.

[0037] The second output shaft 20f of the first planetary gear set 23 is connected to the second brake member 22 and the first clutch member 25. The first output shaft 20e and the second output shaft 20f of the second planetary gear set 24 are respectively connected to a pair of wheels 40 and a brake (not shown). In the embodiments of this application, the pair of wheels 40 are the front wheels of the vehicle. In addition, the pair of wheels 40 may also be the rear wheels of the vehicle, and this application does not limit this.

[0038] According to the embodiments of this application, the first braking element 21 and the second braking element 22 are brakes, and the first clutch element 25 is a clutch or synchronizer. The clutch can transmit greater torque, withstand higher workloads, and engages more smoothly. The synchronizer has a compact structure and is lightweight. The synchronizer effectively avoids gear grinding and impact, and has lower manufacturing costs.

[0039] The first gear set 31 connects the engine 11 to the input shaft 20d of the first planetary gear set 23. The second gear set 32 ​​connects the second motor 13 to the drive shaft 26. The third gear set 33 connects the drive shaft 26 to the input shaft 20d of the second planetary gear set 24. The second output shaft 20f of the first planetary gear set 23 rotates coaxially with the drive shaft 26. Both the second gear set 32 ​​and the third gear set 33 rotate coaxially with respect to the drive shaft 26, saving the multiple connecting shafts, bearing seats, and supporting structures required in traditional layouts to connect components with different axes. This simplifies the overall transmission structure, reduces the number of parts, shortens the power transmission path, provides a more direct power response, and reduces torque transmission delay.

[0040] See Figure 3 As shown in another embodiment of this application, the gear assembly 30 further includes a fourth gear set 34. The fourth gear set 34 is disposed between the first motor 12 and the first output shaft 20e of the first planetary gear set 23. Through the deceleration or acceleration effect of the added fourth gear set 34, the speed or torque of the first motor 12 can be rematched with the input requirements of the first planetary gear set 23, thereby improving system efficiency. At the same time, the installation position and axial direction of the first motor 12 can be more flexible after the fourth gear set 34 is set, optimizing the space utilization of the entire drive system.

[0041] See Figure 4 As shown in another embodiment of this application, the hybrid drive system further includes a gearbox 50. The gearbox 50 is mounted on the drive shaft 26, adding multiple mechanical transmission ratios to the entire hybrid drive system. In embodiments of this application, the gearbox 50 may be located between the second brake member 22 and the second gear set 32 ​​or the third gear set 33.

[0042] See Figure 5 As shown in another embodiment of this application, the transmission assembly 20 further includes a second clutch 27, which connects the engine 11 to the input shaft 20d of the first planetary gear set 23. The second clutch 27 is a clutch or a synchronizer. In the embodiments of this application, the second clutch 27 is a clutch.

[0043] See Figures 6 to 10As shown, the different operating states of the engine 11, the first motor 12, and the second motor 13, combined with the locking or disengaging states of the first brake component 21, the second brake component 22, and the first clutch component 25, form multiple operating modes. These multiple operating modes include parking power generation mode, pure electric mode, series mode, parallel mode, and power split mode. This application coordinates and controls three power sources, two brake components, and the clutch component to switch between multiple operating modes, covering various vehicle usage scenarios, enabling the vehicle to maintain optimal economy and power performance under five operating conditions.

[0044] The hybrid drive system of this application can achieve the following five operating modes, as shown in the table below: See Figure 6 As shown, the hybrid drive system of this application is in a parking power generation mode. The hybrid drive system also includes a power battery 60, which is connected to the first motor 12. In the parking power generation mode: the engine 11 starts, the first motor 12 is in a power generation state, the second motor 13 does not work, the first brake 21 is disengaged, the second brake 22 is locked, and the first clutch 25 is disengaged. The engine 11 starts, and the power it generates is transmitted through the first gear set 31 to the input shaft 20d and planet carrier 20a of the first planetary gear set 23. The power input from the engine 11 to the first planetary gear set 23 is transmitted through the first output shaft 20e to the first motor 12 and finally input to the power battery 60. In the parking power generation mode, the engine 11 drives the first motor 12 to generate electricity and transmits the electrical energy to the power battery 60.

[0045] See Figure 7 As shown, the hybrid drive system operates in pure electric mode. The power battery 60 is connected to the second motor 13. In pure electric mode: the engine 11 is not operating, the first motor 12 is not operating, the second motor 13 is in the propulsion state, the first brake 21 is disengaged, the second brake 22 is disengaged, and the first clutch 25 is disengaged. The power battery 60 sequentially transmits power through the second motor 13, the second gear set 32, the drive shaft 26, and the third gear set 33 to the input shaft 20d of the second planetary gear set 24, and then through the first output shaft 20e and the second output shaft 20f to a pair of wheels 40.

[0046] See Figure 8As shown, the hybrid drive system is in series mode. The power battery 60 is connected to both the first motor 12 and the second motor 13. In series mode: the engine 11 operates, the first motor 12 generates electricity, the second motor 13 is in propulsion mode, the first brake 21 is disengaged, the second brake 22 is locked, and the first clutch 25 is disengaged. The engine 11 transmits power sequentially through the first gear set 31 and the first planetary gear set 23 to the first motor 12, which generates electricity and transmits some of the electrical energy to the power battery 60. The power from the first motor 12 and the power battery 60 is simultaneously transmitted to the second motor 13, and then sequentially through the second gear set 32, the drive shaft 26, the third gear set 33, and the second planetary gear set 24, finally reaching a pair of wheels 40. At this time, the engine 11 drives the first motor 12 to generate electricity, and the electrical energy from the first motor 12 and the power battery 60 can jointly supply the second motor 13, thereby driving the wheels 40.

[0047] See Figure 9 As shown, the hybrid drive system operates in parallel mode. The power battery 60 is connected to the second motor 13. In parallel mode: the engine 11 operates, the first motor 12 does not operate, the second motor 13 propels or generates electricity, the first brake 21 is locked, the second brake 22 is disengaged, and the first clutch 25 is engaged. The power output from the engine 11 is transmitted through the first gear set 31 to the input shaft 20d of the first planetary gear set 23, which in turn drives the planetary carrier 20a to output through the second output shaft 20f and then transmits the power to the drive shaft 26 via the first clutch 25. The electrical energy from the power battery 60 is transmitted to the second motor 13 and then to the drive shaft 26 via the second gear set 32. Therefore, the power from the engine 11 and the second motor 13 converge on the drive shaft 26 and is transmitted to the wheels 40 through the third gear set 33 and the second planetary gear set 24.

[0048] See Figure 10 As shown, the hybrid drive system operates in a power-split mode. The power battery 60 is connected to both the first motor 12 and the second motor 13. In power-split mode: the engine 11 operates, the first motor 12 generates electricity, the second motor 13 propels or generates electricity, the first brake 21 disengages, the second brake 22 disengages, and the first clutch 25 engages. The power from the engine 11 is transmitted via the first gear set 31 to the input shaft 20d of the first planetary gear set 23 and then to the planet carrier 20a. Power is split within the first planetary gear set 23; some power is directly transmitted to the first clutch 25, the drive shaft 26, and the third gear set 33, and then to the second planetary gear set 24. The other portion of power drives the first motor 12 to generate electricity, and the kinetic energy is transmitted to the power battery 60. The second motor 13 then obtains electrical energy from the power battery 60 and the first motor 12, converts it into mechanical energy, and outputs it through the second gear set 32 ​​to the drive shaft 26, where it combines with the power from the first planetary gear set 23 to ultimately drive the wheels 40.

[0049] This application also provides a vehicle including the hybrid drive system described above.

[0050] This application utilizes the cooperation of the first planetary gear set 23 and the second planetary gear set 24, the coupling of two braking components and a clutch component, and the transmission of the gear assembly 30 to enable the direction control and mode switching of power flow by setting up two motors. This simplifies the structure of the hybrid drive system and reduces manufacturing costs. Furthermore, the hybrid drive system of this application can achieve five operating modes, allowing the vehicle to adapt to more driving conditions and exhibiting high versatility.

[0051] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A hybrid power drive system, characterized in that, include: The system comprises a power assembly, a transmission assembly, and a gear assembly; the power assembly includes an engine, a first motor, and a second motor; the transmission assembly includes a first brake, a second brake, a first planetary gear set, a second planetary gear set, and a first clutch; the gear assembly is disposed between the power assembly and the transmission assembly; the engine, the first motor, the first brake, and the second brake are all connected to the first planetary gear set, the second brake, the first clutch, the second motor, and the second planetary gear set are sequentially connected to at least one drive shaft, and the second planetary gear set is connected to a pair of wheels.

2. The hybrid drive system according to claim 1, characterized in that, Both the first planetary gear set and the second planetary gear set include a planet carrier and two sun gears, two planet gears, an input shaft, a first output shaft, and a second output shaft mounted on the planet carrier; the input shaft is connected to the planet carrier in a transmission manner; the two sun gears mesh with the two planet gears, and the first output shaft and the second output shaft are respectively connected to the two sun gears and rotate coaxially.

3. The hybrid drive system according to claim 2, characterized in that, The first motor is connected to the first output shaft of the first planetary gear set; the first brake is disposed on the first output shaft of the first planetary gear set; the second output shaft of the first planetary gear set is connected to the second brake and the first clutch; the first output shaft and the second output shaft of the second planetary gear set are respectively connected to the pair of wheels.

4. The hybrid drive system according to claim 3, characterized in that, The gear assembly includes a first gear set, a second gear set, and a third gear set; the first gear set connects the engine to the input shaft of the first planetary gear set, the second gear set connects the second motor to the drive shaft, and the third gear set connects the drive shaft to the input shaft of the second planetary gear set.

5. The hybrid drive system according to claim 4, characterized in that, The gear assembly further includes a fourth gear set, which is disposed between the first motor and the first output shaft of the first planetary gear set.

6. The hybrid drive system according to claim 5, characterized in that, It also includes a gearbox, which is mounted on the drive shaft; the gearbox is located between the second brake and the second gear set or the third gear set.

7. The hybrid drive system according to claim 3, characterized in that, The transmission assembly further includes a second clutch that connects the engine to the input shaft of the first planetary gear set.

8. The hybrid drive system according to claim 7, characterized in that, The first clutch component and the second clutch component are clutches or synchronizers.

9. The hybrid drive system according to claim 1, characterized in that, The different operating states of the engine, the first motor, and the second motor, combined with the locking or disengaging states of the first brake, the second brake, and the first clutch, form multiple operating modes; the multiple operating modes include parking power generation mode, pure electric mode, series mode, parallel mode, and power split mode.

10. A vehicle, characterized in that, The system includes a hybrid drive system as described in any one of claims 1-9.

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