Hybrid power driving system and vehicle

Abstract

The embodiment of the invention provides a hybrid power driving system and a vehicle. The hybrid power driving system comprises a duplex tooth planet row, a clutch, an engine, a battery, a front generator and a rear drive motor. A center shaft of the duplex-tooth planet row extends in the width direction of a vehicle, the duplex-tooth planet row comprises a first sun gear, a second sun gear, a planet carrier and a planet gear set, and the planet gear set is meshed with the first sun gear and the second sun gear. The engine is arranged in the width direction of the vehicle, the engine is in power coupling with the planet wheel set, and the planet wheel set, the first sun wheel, the clutch and the front driving module are sequentially in power transmission connection; a rotor of the front generator is in dynamic coupling with the second sun gear, and a rotor of the rear drive motor is in dynamic coupling with the rear drive module so as to drive rear wheels of the vehicle to rotate. Therefore, the hybrid power driving system has the advantages of being simplified in structure and good in structural compactness.

Description

Technical Field

[0001] This invention relates to the field of vehicle power technology, and more specifically to a hybrid power drive system and a vehicle having the hybrid power drive system. Background Technology

[0002] In related technologies, hybrid drive systems generally adopt a longitudinal engine layout, with the engine crankshaft arranged longitudinally along the vehicle. Its output torque is transmitted to the front drive shaft after being redirected by 90° via a bevel gear pair. Simultaneously, the front motor and a two-speed gear set work together to complete gear shifting and torque compensation. The bevel gear reversing mechanism requires additional active and driven bevel gears and corresponding bearing support structures, resulting in a significant increase in the front axle housing size in the vehicle width direction, which is not conducive to the compact layout of the transverse platform engine compartment. The bevel gear pair needs to use high-precision helical gears and a grinding process, making its manufacturing cost higher than that of ordinary cylindrical gears. At the same time, in order to withstand the axial force generated by the bevel gears, the housing needs to be thickened and a thrust bearing needs to be installed, further increasing material and processing costs. Summary of the Invention

[0003] In view of this, embodiments of the present invention aim to provide a hybrid drive system and vehicle to solve the problems of large size and high cost of existing hybrid drive systems.

[0004] One aspect of this invention is a hybrid power drive system.

[0005] One aspect of this invention is a vehicle.

[0006] The hybrid drive system of this invention includes a double-gear planetary gear set, a clutch, an engine, a battery, a front generator, and a rear drive motor.

[0007] The central axis of the double-gear planetary gear set extends along the width direction of the vehicle. The double-gear planetary gear set includes a first sun gear, a second sun gear, a planet carrier, and a planetary gear set. The first sun gear and the second sun gear are sequentially meshed with the planetary gear set along the width direction of the vehicle. The planetary gear set is meshed with the first sun gear and the second sun gear. The front-drive module is used to rotate the front wheels of the vehicle. The clutch is used to control the power coupling and disconnection between the first sun gear and the front-drive module. The engine is arranged in the front compartment of the vehicle along the width direction. The engine is power-coupled with the planetary gear set. The planetary gear set, the first sun gear, the clutch, and the front-drive module are sequentially connected for power transmission to drive the front wheels of the vehicle to rotate. The battery, the front generator, and the rear-drive motor are also included. The battery is disconnectably electrically connected to each of the front generator and the rear-drive motor. The rotor of the front generator is power-coupled with the second sun gear, and the rotor of the rear-drive motor is power-coupled with the rear-drive module to drive the rear wheels of the vehicle to rotate.

[0008] The hybrid drive system of this invention, by arranging both the engine and the double-gear planetary gear set along the width direction of the vehicle, eliminates the need for a bevel gear reversing mechanism compared to a longitudinal (vehicle length direction) engine layout. The engine crankshaft and planetary gear set center axis are aligned, allowing power to be directly transmitted along the width direction to the front wheel differential. This eliminates the need for a 90° bevel gear pair and its thrust bearing, reducing the number of parts, material costs, and assembly time. Simultaneously, the transverse layout shortens the power path, improving mechanical transmission efficiency by 0.8–1.2%.

[0009] Furthermore, the shortened transverse layout of the gearbox allows the planetary gear set, clutch, and differential to be stacked in the same radial plane, reducing the axial (vehicle length) dimension by ≥30 mm. This facilitates a more compact engine compartment, freeing up space for the battery pack or air conditioning unit. The effectively shortened longitudinal dimension of the vehicle's front compartment results in a more compact engine compartment layout, providing greater flexibility for the overall vehicle design.

[0010] On the other hand, the engine is coupled to the planetary gear set in the double-gear planetary set, achieving integrated power splitting with "single input - dual-path controllable output". The engine torque is simultaneously distributed to the first sun gear and the second sun gear via the planetary carrier, forming two parallel power paths. The first sun gear can selectively engage or disengage with the front drive module under clutch control. Thus, the same planetary set performs both mechanical power splitting and mode switching, eliminating the need for additional shift gear sets and reducing the number of parts by ≥15%. This enables different operating states under different drive modes.

[0011] The hybrid drive system of this invention has the advantages of simplified structure and good structural compactness.

[0012] In one embodiment, the hybrid drive system has a driving mode, a parking power generation mode, and an energy recovery mode.

[0013] In the driving mode, the clutch is locked, and at least one of the engine, the front generator, and the rear drive motor is started to drive the front and / or rear wheels of the vehicle to rotate. In the parking generator mode, both the clutch and the first sun gear are locked, the output shaft of the engine is poweredly coupled to the planetary gear set, and the planetary gear set drives the second sun gear to rotate, so as to convert the power of the engine into electrical energy input to the battery.

[0014] In energy recovery mode, the clutch is disengaged or locked, and the rear wheels of the vehicle drive the rear drive motor to rotate through the rear drive module, so as to convert the power of the rear wheels of the vehicle into electrical energy and input it into the battery to charge the battery.

[0015] In one embodiment, the driving modes include a power-split hybrid mode, a pure electric mode, and a pure electric driving engine start mode that can be switched between each other.

[0016] In the power-split hybrid mode, the clutch is locked, the engine starts, the output shaft of the engine is poweredly coupled to the planetary gear set, the planetary gear set drives the first sun gear and the second sun gear to rotate, so that a part of the engine power is split and transmitted to the front wheels of the vehicle, and another part of the engine power is split and transmitted to the front generator to generate electricity, and the generated electricity is transmitted to the rear drive motor and / or the battery.

[0017] In pure electric mode, the clutch is disengaged, the battery is electrically connected to the rear drive motor, and the rear drive motor is power-coupled with the rear drive module to simultaneously drive the rear wheels of the vehicle to rotate. In the pure electric driving and engine start mode, the clutch switches from disengaged to locked. The battery is electrically connected to both the rear drive motor and the front generator. The rear drive motor is power-coupled with the rear drive module to simultaneously drive the rear wheels of the vehicle to rotate. The front generator is power-coupled sequentially with the double-gear planetary gear set and the engine to drive the engine to rotate and start.

[0018] In one embodiment, the hybrid drive system further includes a flywheel assembly, with power gears provided on the output shaft of the engine, one end of the flywheel assembly meshing with the power gears of the engine, and the other end of the flywheel assembly connected to the planetary gear assembly.

[0019] In one embodiment, the planetary gear set includes a planet carrier, a first planetary gear, and a second planetary gear. The first sun gear meshes with the first planetary gear, and the second sun gear meshes with the second planetary gear. The first planetary gear and the second planetary gear are coaxially mounted on the planet carrier axle, and the other end of the flywheel set is connected to the planet carrier.

[0020] In one embodiment, the clutch is powered to engage between the first sun gear and the front-drive module. The clutch includes a driving gear and a driven gear arranged sequentially along the width direction of the vehicle. The driving gear is driven to the first sun gear, and the driven gear is driven to the front-drive module. The driving gear and the driven gear are selectively engaged or disengaged.

[0021] In one embodiment, the clutch is an electromagnetic clutch.

[0022] In one embodiment, the hybrid drive system further includes a first inverter disposed between the front generator and the battery.

[0023] In one embodiment, the hybrid drive system further includes a second inverter disposed between the rear drive motor and the battery.

[0024] In one embodiment, the front-drive module includes a first differential and a first transmission gear set, wherein the input end of the first differential is poweredly coupled to the clutch through the first transmission gear set, and the output end of the first differential is poweredly coupled to the front wheels of the vehicle.

[0025] In one embodiment, the rear-drive module includes a second differential and a second transmission gear set, the second transmission gear set being dynamically coupled to the output shaft of the rear-drive motor, and the second transmission gear set being dynamically coupled to the rear wheels of the vehicle through the second differential.

[0026] The vehicle of this invention includes a vehicle body and a hybrid drive system according to any one of the above descriptions, wherein the front-wheel drive module is power-coupled to the front wheels of the vehicle body, and the rear-wheel drive module is power-coupled to the rear wheels of the vehicle body. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a hybrid power drive system according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of a hybrid drive system according to an embodiment of the present invention, wherein the arrows are schematic diagrams of the power transmission route in the power split hybrid mode.

[0029] Figure 3 This is a schematic diagram of a hybrid drive system according to an embodiment of the present invention, wherein the arrows represent the power transmission route in the pure electric driving mode when the engine is started.

[0030] Figure 4 This is a schematic diagram of a hybrid drive system according to an embodiment of the present invention, wherein the arrows represent the power transmission route in energy recovery mode.

[0031] Figure 5 This is a schematic diagram of a hybrid drive system according to an embodiment of the present invention, wherein the arrows represent the power transmission route in pure electric driving mode.

[0032] Figure 6 This is a schematic diagram of a hybrid drive system according to an embodiment of the present invention, wherein the arrows represent the power transmission route in the parking power generation mode.

[0033] Explanation of reference numerals in the attached figures: Hybrid drive system 100; left front wheel 201; right front wheel 202; left rear wheel 301; right rear wheel 302; Double-toothed planetary gear set 1; First sun gear 11; Second sun gear 12; Planetary gear set 13; Planet carrier 14; Clutch 2; Driving gear 21; Driven gear 22; Front drive module 3; First differential 31; First transmission gear set 32; Engine 4; Battery 5; Front generator 6; Rear drive motor 7; Rear drive module 8; Second differential 81; Second transmission gear set 82; Flywheel assembly 9; First inverter 101; second inverter 102. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] The following is for reference. Figures 1-6 The hybrid drive system 100 and the vehicle of the present invention will be described by way of example.

[0036] The hybrid drive system 100 of this invention includes a double-gear planetary gear set 1, a clutch 2, an engine 4, a battery 5, a front generator 6, a rear drive motor 7, a front drive module 3, and a rear drive module 8.

[0037] A double-gear planetary gear set 1 is mounted on the front-wheel drive module 3. The central axis of the double-gear planetary gear set 1 extends along the width direction of the vehicle. The double-gear planetary gear set 1 includes a first sun gear 11, a second sun gear 12, a planet carrier 14, and a planetary gear set 13. The first sun gear 11 and the second sun gear 12 are sequentially meshed with the planetary gear set 13 along the width direction of the vehicle. The planetary gear set 13 meshes with the first sun gear 11 and the second sun gear 12. The clutch 2 is used to control the power coupling and disconnection between the first sun gear 11 and the front-wheel drive module 3. Engine 4 Arranged along the width of the vehicle in the front compartment, the engine 4 is poweredly coupled to the planetary gear set 13. The planetary gear set 13, the first sun gear 11, the clutch 2, and the front drive module 3 are sequentially connected to drive the front wheels of the vehicle. The battery 5, the front generator 6, and the rear drive motor 7 are also present. The battery 5 is disconnectably electrically connected to each of the front generator 6 and the rear drive motor 7. The rotor of the front generator 6 is poweredly coupled to the second sun gear 12, and the rotor of the rear drive motor 7 is poweredly coupled to the rear drive module 8 to drive the rear wheels of the vehicle.

[0038] The hybrid drive system 100 of this invention arranges both the engine 4 and the double-gear planetary gear set 1 along the width direction of the vehicle. Compared to a longitudinal (vehicle length direction) layout of the engine 4, this eliminates the need for a bevel gear reversing mechanism. The crankshaft of the engine 4 is aligned with the central axis of the planetary gear set, allowing power to be directly transmitted along the width direction to the front wheel differential. This eliminates the need for a 90° bevel gear pair and its thrust bearing, reducing the number of parts, material costs, and assembly time. Simultaneously, the transverse layout shortens the power path, correspondingly improving mechanical transmission efficiency.

[0039] Furthermore, the shortened transverse layout of the gearbox allows the planetary gear set, clutch 2, and differential to be stacked in the same radial plane, reducing the axial (vehicle length) dimension by ≥30 mm. This facilitates a more compact engine compartment, freeing up space for the battery pack or air conditioning unit. It effectively shortens the longitudinal dimension of the vehicle's front compartment, resulting in a more compact engine compartment layout and providing greater flexibility for the overall vehicle design.

[0040] On the other hand, engine 4 is powered by planetary gear set 13 in the double-gear planetary gear set 1, realizing integrated power splitting of "single input - dual-path controllable output". The torque of engine 4 is simultaneously distributed to the first sun gear 11 and the second sun gear 12 via the planetary carrier, forming two parallel power paths. The first sun gear 11 can selectively engage or disengage with the front drive module 3 under the control of clutch 2. Thus, the same planetary gear set not only completes mechanical power splitting but also undertakes mode switching function, eliminating the need for additional shift gear sets and reducing the number of parts by ≥15%.

[0041] The hybrid drive system 100 of this invention has the advantages of simplified structure and good structural compactness.

[0042] The front wheels of the vehicle body include a left front wheel 201 and a right front wheel 202; the rear wheels of the vehicle body include a left rear wheel 301 and a right rear wheel 302.

[0043] like Figures 2 to 4 As shown, the hybrid drive system 100 has a driving mode, a parking power generation mode, and an energy recovery mode. Therefore, the hybrid drive system 100 of this embodiment of the invention, through the design of multiple operating states in the aforementioned front-wheel drive mode, achieves efficient utilization and flexible distribution of power.

[0044] In drive mode, clutch 2 is locked, and at least one of engine 4, front generator 6, and rear drive motor 7 is activated to drive the front and / or rear wheels of the vehicle. Drive modes include switchable power split hybrid mode, pure electric mode, and pure electric start engine mode.

[0045] like Figure 2As shown, in the power split hybrid mode, clutch 2 is locked, engine 4 starts, and the output shaft of engine 4 is poweredly coupled to planetary gear set 13. Planetary gear set 13 drives the first sun gear 11 and the second sun gear 12 to rotate, so that part of the power of engine 4 is split and transmitted to the front wheels of the vehicle, and the other part of the power of engine 4 is split and transmitted to the rear drive motor 7 and / or battery 5.

[0046] In the hybrid drive system 100 of this embodiment, the engine 4 is coupled to the planetary gear set 13 in the double-gear planetary gear set 1, achieving integrated power splitting with "single input - dual-path controllable output". The torque of the engine 4 is simultaneously distributed to the first sun gear 11 and the second sun gear 12 via the planetary carrier, forming two parallel power paths. One power transmission path is the planetary gear set 13, the first sun gear 11, and the front drive module 3, thereby driving the front wheels of the vehicle to rotate. The other power transmission path is the planetary gear set 13, the second sun gear 12, and the front generator 6 to generate electricity, which is then directly used to drive the rear drive motor 7 and / or stored in the battery 5. Furthermore, in the power split hybrid mode, the power of the engine 4 is rationally split, ensuring the driving needs of the front wheels of the vehicle while also providing power to the rear drive motor 7 or the battery 5, thus improving the overall energy utilization efficiency.

[0047] like Figure 3 As shown, in pure electric mode, clutch 2 is disengaged, battery 5 is electrically connected to rear drive motor 7, and rear drive motor 7 is power-coupled with rear drive module 8 to simultaneously drive the rear wheels of the vehicle to rotate.

[0048] The hybrid drive system 100 of this invention, in pure electric mode, relies solely on the battery 5 to power the rear-drive motor 7 to drive the vehicle, eliminating the need to start the engine 4. Therefore, this mode achieves a zero-emission, environmentally friendly driving experience. Simultaneously, the tight power coupling between the rear-drive motor 7 and the rear-drive module 8 ensures efficient and direct power transmission, enabling the vehicle to maintain excellent acceleration performance and handling stability even in pure electric mode. This mode is suitable for short-distance travel or congested urban traffic, effectively reducing operating costs and environmental pollution.

[0049] like Figure 4 As shown, in the pure electric driving and engine starting mode 4, the clutch 2 is disengaged and locked. The battery 5 is electrically connected to the rear drive motor 7 and the front generator 6. The rear drive motor 7 is powered by the rear drive module 8 to drive the rear wheels of the vehicle to rotate simultaneously. The front generator 6 is powered by the double-gear planetary gear set 1 and the engine 4 in sequence to drive the engine 4 to rotate and start.

[0050] The hybrid drive system 100 of this invention features a cleverly designed engine 4-starting mode for pure electric driving. When the vehicle is driving in pure electric mode and the engine 4 needs to intervene to provide greater power or perform other operations, this mode allows for a smooth start to the engine 4. Specifically, the battery 5 simultaneously powers the rear drive motor 7 and the front generator 6. The front generator 6 achieves power coupling with the engine 4 through a double-gear planetary gear set 1, thereby starting the engine 4. This process eliminates the need for additional starting devices or complex mechanical structures, simplifying the system design and improving starting efficiency and reliability. Furthermore, this mode ensures the smoothness of the engine 4's start-up process, avoiding adverse effects on vehicle driving stability caused by starting shock.

[0051] like Figure 5 As shown, in the parking power generation mode, both clutch 2 and the first sun gear 11 are locked, the output shaft of the engine 4 is poweredly coupled to the planetary gear set 13, and the planetary gear set 13 drives the second sun gear 12 to rotate, so as to convert the power of the engine 4 into electrical energy and transmit it to the battery 5.

[0052] In the hybrid drive system 100 of this embodiment, both the clutch 2 and the first sun gear 11 are locked. The reaction torque input from the planetary carrier is directly borne by the vehicle body, eliminating the need for an additional parking lock mechanism and achieving efficient parking power generation, thus simplifying the gearbox structure. The "engagement / disengagement" of the clutch 2 with the first sun gear 11 only changes the planetary gear lever ratio. There is no rigid mechanical disengagement between the engine 4 and the wheels. During the switching process, the second sun gear 12 can still continuously drive the motor to generate electricity or provide power assistance. There is no torque gap in the entire vehicle, improving driving smoothness.

[0053] like Figure 6 As shown, in energy recovery mode, clutch 2 is disengaged or locked, and the rotation of the vehicle's rear wheels drives the rear drive motor 7 to rotate through the rear drive module 8, generating electrical energy that is input to the battery 5, thereby charging the battery 5.

[0054] The hybrid drive system 100 of this invention features an energy recovery mode that cleverly utilizes the kinetic energy of the vehicle during deceleration or braking. This energy is then used to drive the rear drive motor 7 to generate electricity via the rear drive module 8, converting potentially wasted energy into electrical energy stored in the battery 5. This achieves energy recycling, effectively extending the vehicle's driving range and reducing operating costs.

[0055] In energy recovery mode, clutch 2 can be disengaged or locked. If clutch 2 is disengaged, engine 4 is stationary; if clutch 2 is locked, engine 4 idles without throttle.

[0056] like Figures 1 to 6As shown, the hybrid drive system 100 also includes a flywheel assembly 9, a power gear is provided on the output shaft of the engine 4, one end of the flywheel assembly 9 meshes with the power gear of the engine 4, and the other end of the flywheel assembly 9 is connected to the planetary carrier 14.

[0057] The hybrid drive system 100 of this invention further optimizes the smoothness of power transmission by adding a flywheel assembly 9. The power gear on the output shaft of the engine 4 precisely meshes with one end of the flywheel assembly 9, and the other end of the flywheel assembly 9 is firmly connected to the planetary carrier 14. During the operation of the engine 4, the flywheel assembly 9, by virtue of its own inertial characteristics, can effectively buffer the power fluctuations output by the engine 4, making the power transmitted to the planetary carrier 14 more stable and continuous, reducing the impact and vibration that may be caused by power instability. This not only improves the smoothness of the entire hybrid drive system 100 operation, but also reduces the wear of components caused by frequent impacts, extends the service life of the system, and provides a more comfortable and quiet driving environment for the vehicle.

[0058] like Figures 1 to 6 As shown, the planetary gear set 1 includes a planet carrier, a first planetary gear and a second planetary gear. The first sun gear 11 meshes with the first planetary gear, and the second sun gear 12 meshes with the second planetary gear. The first planetary gear and the second planetary gear are coaxially mounted on the axle of the planet carrier 14. The other end of the flywheel assembly 9 is connected to the planet carrier.

[0059] The hybrid drive system 100 of this invention forms a clear power distribution path by meshing the first sun gear 11 with the first planetary gear and the second sun gear 12 with the second planetary gear, allowing the power of the engine 4 to be distributed to the front-wheel drive, rear-wheel drive, and / or battery 5 according to a preset ratio. Simultaneously, the first and second planetary gears are coaxially mounted on the planetary carrier 14 axle, further enhancing the stability of power transmission and reducing energy loss. The connection between the flywheel assembly 9 and the planetary carrier effectively suppresses fluctuations in the output power of the engine 4, resulting in a smoother and more comfortable vehicle ride.

[0060] Furthermore, the number of teeth of the first planetary gear and the second planetary gear is configured such that the lever ratio α of the double-toothed planetary gear set 1 satisfies: 1.8≤α≤3.2.

[0061] The hybrid drive system 100 of this invention configures the number of teeth of the first planetary gear and the second planetary gear in a specific way, so that the leverage ratio α of the double-tooth planetary gear set 1 is in the range of 1.8 to 3.2. The power of the engine 4 can be reasonably distributed to the battery 5 and / or the rear drive module 8 and the front drive module 3 according to the vehicle's driving needs, which not only ensures the vehicle's power performance under different operating conditions, but also optimizes energy utilization efficiency.

[0062] like Figures 1 to 6As shown, the clutch 2 is powered to engage between the first sun gear 11 and the front drive module 3. The clutch 2 includes a driving gear 21 and a driven gear 22 arranged sequentially along the width direction of the vehicle. The driving gear 21 is connected to the first sun gear 11, and the driven gear 22 is connected to the front drive module 3. The driving gear 21 and the driven gear 22 are selectively engaged or disengaged.

[0063] The hybrid drive system 100 of this embodiment ensures that the power of the engine 4 can be accurately transmitted to the clutch 2 by connecting the active gear 21 to the first sun gear 11; the drive gear 22 is connected to the front drive module 3, allowing the clutch 2 to selectively transmit power to the front drive module 3 according to actual needs, driving the front wheels of the vehicle to rotate. This structure of the active gear 21 and the driven gear 22 arranged sequentially along the width of the vehicle not only simplifies the power transmission path and reduces energy loss, but also improves the reliability and stability of the clutch 2.

[0064] When clutch 2 is disengaged, the active rotating gear 21 and the driven rotating gear 22 quickly separate, cutting off power transmission and realizing the vehicle's power switching and mode conversion, such as switching from pure electric mode to hybrid mode, or from driving mode to power generation mode, etc., to meet the diverse needs of the vehicle in different driving scenarios.

[0065] Clutch 2 is an electromagnetic clutch 2. The electromagnetic clutch 2 uses electromagnetic force to engage and disengage the driving gear 21 and the driven gear 22. This electromagnetic clutch 2 has advantages such as fast response speed, high control precision, and long service life, and can better meet the performance requirements of the hybrid drive system 100 for clutch 2.

[0066] Specifically, the electromagnetic clutch 2 includes a housing, an electromagnetic coil, a driven rotor, and an armature disc. The housing is fixed to the front cover of the transmission and does not rotate. The electromagnetic coil is embedded in the housing and arranged concentrically with the housing along the axial direction. The driven rotor is spline-coupled with the output shaft of the engine 4 or the motor shaft to input rotational power, and one end of the driven rotor is fixed with a toothed clutch. The driven rotor is spline-coupled with the input shaft of the vehicle's front differential to output rotational power. The armature disc can move axially between a first position and a second position. In the first position, the armature disc is attracted by the electromagnetic coil, and the armature disc presses the toothed clutch disc against the toothed clutch disc of the dual gear, thereby establishing a torque transmission path. In the second position, the toothed clutch disc and the armature disc are pushed apart by a spring, forming an axial gap with the toothed clutch disc of the dual gear, thereby cutting off the torque transmission path. The spring is located between the driven rotor and the armature disc and is used to drive the armature disc to reset to the second position when the electromagnetic coil is de-energized.

[0067] The hybrid drive system 100 of this embodiment of the invention further includes a first inverter 101 and a second inverter 102. The first inverter 101 is disposed between the front generator 6 and the battery 5; the second inverter 102 is disposed between the rear drive motor 7 and the battery 5.

[0068] The hybrid drive system 100 of this invention, by adding a first inverter 101 and a second inverter 102, achieves precise control over the energy conversion between the front and rear drive motors and the battery 5. The first inverter 101 is located between the front generator 6 and the battery 5. Its main function is to supply the electricity generated by the front generator 6 to charge the battery 5 or to drive the rear drive motor 7 using the second inverter 102. It also converts the DC power output from the battery 5 into AC power to drive the front generator 6, meeting the vehicle's engine starting requirements. The second inverter 102 functions similarly to the first inverter 101, also responsible for the energy conversion between the rear drive motor 7 and the battery 5. It ensures that the rear drive motor 7 can independently drive the rear wheels in pure electric mode and converts the kinetic energy of the rear wheel rotation into electrical energy stored in the battery 5 in energy recovery mode.

[0069] It should be noted that during the vehicle motor's power generation and discharge process, the connection between the motor (front generator 6 and rear drive motor 7) and the battery is a bidirectional DC bus + bidirectional inverter. Discharge (electric): The inverter converts the DC bus power into three-phase AC; Power generation (energy recovery): The inverter operates in rectification / boost mode, rectifying the three-phase AC generated by the motor into DC, realizing constant current / constant power charging to the battery.

[0070] like Figures 1 to 6 As shown, the front-drive module 3 includes a first differential 31 and a first transmission gear set 32. The input end of the first differential 31 is poweredly coupled to the clutch 2 through the first transmission gear set 32, and the output end of the first differential 31 can be poweredly coupled to the front wheels of the vehicle. The rear-drive module 8 includes a second differential 81 and a second transmission gear set 82. The second transmission gear set 82 is poweredly coupled to the output shaft of the rear-drive motor 7, and the second transmission gear set 82 is poweredly coupled to the rear wheels of the vehicle through the second differential 81.

[0071] The hybrid drive system 100 of this invention is divided into a differential and a transmission gear through a drive module, which not only simplifies the power transmission path but also improves the stability of power transmission. During vehicle operation, the first differential 31 can automatically adjust the speed difference between the left and right front wheels according to the vehicle's driving status and road conditions, ensuring the vehicle's smoothness and handling.

[0072] This invention also discloses a vehicle including a hybrid drive system 100 according to any one of the above.

[0073] The vehicle of this invention has the advantages of simplified structure and good structural compactness.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0075] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0079] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hybrid drive system characterized by comprising: Comprise: A double gear planetary set, wherein the center shaft extends along the width direction of the vehicle, the double gear planetary set comprises a first sun gear, a second sun gear, a planet carrier and a planet gear set, the first sun gear and the second sun gear are sequentially meshed with the planet gear set along the width direction of the vehicle, and the planet gear set is meshed with the first sun gear and the second sun gear; A front drive module for rotating the front wheels of the vehicle; A clutch for controlling the power coupling and disconnection of the first sun gear and the front drive module; An engine arranged in the front compartment of the vehicle along the width direction of the vehicle, the engine is power coupled with the planet gear set, and the planet gear set, the first sun gear and the clutch, the front drive module are sequentially power transmission connected to drive the front wheels of the vehicle to rotate; A battery, a front generator, a rear drive motor and a rear drive module, the battery is disconnectively electrically connected with each of the front generator and the rear drive motor, the rotor of the front generator is power coupled with the second sun gear, and the rotor of the rear drive motor is power coupled with the rear drive module to drive the rear wheels of the vehicle to rotate.

2. The hybrid drive system according to claim 1, wherein: The hybrid drive system has a drive running mode, a parking power generation mode and an energy recovery mode which can be switched with each other; In the drive running mode, the clutch is locked, and at least one of the engine, the front generator and the rear drive motor is started to drive the front wheels and / or the rear wheels of the vehicle to rotate; In the parking power generation mode, the clutch and the first sun gear are both locked, the output shaft of the engine is power coupled with the planet gear set, the planet gear set drives the second sun gear to rotate to convert the power of the engine into electric energy input into the battery; In the energy recovery mode, the clutch is disconnected or locked, the rear wheels of the vehicle drive the rear drive motor to rotate through the rear drive module to convert the power of the rear wheels of the vehicle into electric energy input into the battery to charge the battery.

3. The hybrid drive system according to claim 2, wherein: The drive running mode comprises a power split hybrid mode, a pure electric mode and a pure electric running engine starting mode which can be switched with each other; In the power split hybrid mode, the clutch is locked, the engine is started, the output shaft of the engine is power coupled with the planet gear set, the planet gear set drives the first sun gear and the second sun gear to rotate to make a part of the power of the engine split transmission to the front wheels of the vehicle, and another part of the power of the engine split transmission to the front generator, the electricity generated by the front generator is delivered to the rear drive motor and / or the battery; In the pure electric mode, the clutch is disconnected, the battery is electrically connected with the rear drive motor, and the rear drive motor is power coupled with the rear drive module to simultaneously drive the rear wheels of the vehicle to rotate. In the pure electric driving starting engine mode, the clutch is switched from disengagement to locking, the battery is electrically connected with the rear drive motor and the front generator, the rear drive motor is coupled with the power of the rear drive module to drive the rear wheels of the vehicle to rotate, and the front generator is coupled with the power of the double planetary gear set and the engine in sequence to drive the engine to rotate and start.

4. The hybrid drive system according to claim 1, further comprising a flywheel set, wherein a power tooth is arranged on an output shaft of the engine, one end of the flywheel set is engaged with the power tooth of the engine, and the other end of the flywheel set is connected with the planet carrier.

5. The hybrid drive system according to claim 4, wherein the planetary gear set comprises a planet carrier, a first planetary gear and a second planetary gear, the first sun gear is engaged with the first planetary gear, the second sun gear is engaged with the second planetary gear, the first planetary gear and the second planetary gear are coaxially arranged on a planet carrier shaft, and the other end of the flywheel set is connected with the planet carrier.

6. The hybrid drive system according to claim 1, wherein the clutch is power-engaged between the first sun gear and the front drive module, the clutch comprises a driving rotary tooth and a driven rotary tooth arranged in sequence along the width direction of the vehicle, the driving rotary tooth is in transmission connection with the first sun gear, the driven rotary tooth is in transmission connection with the front drive module, and the driving rotary tooth and the driven rotary tooth are selectively locked or disengaged.

7. The hybrid drive system according to claim 6, wherein the clutch is an electromagnetic clutch.

8. The hybrid drive system according to claim 1, further comprising a first inverter arranged between the front generator and the battery, and / or a second inverter arranged between the rear drive motor and the battery.

9. The hybrid drive system according to claim 1, wherein the front drive module comprises a first differential and a first transmission gear set, an input end of the first differential is coupled with the power of the clutch through the first transmission gear set, and an output end of the first differential is capable of being coupled with the power of the front wheels of the vehicle; and the rear drive module comprises a second differential and a second transmission gear set, the second transmission gear set is coupled with the power of the output shaft of the rear drive motor, and the second transmission gear set is coupled with the power of the rear wheels of the vehicle through the second differential. A vehicle body and the hybrid drive system according to any one of claims 1-9, wherein the front drive module is coupled with the power of the front wheels of the vehicle body, and the rear drive module is coupled with the power of the rear wheels of the vehicle body. ​ ​ ​ ​ ​ ​ ​ 10. A vehicle characterized by comprising: ​

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