Hybrid power driving system and vehicle

Abstract

The invention belongs to the technical field of vehicles, and particularly relates to a hybrid power driving system and a vehicle. The planetary gear mechanism comprises an inner gear ring group, a sun gear assembly located in the center of the inner gear ring group, a plurality of planet gears meshed between the inner gear ring group and the sun gear assembly, and a planet carrier rotationally connected with the planet gears; the first motor is connected with the sun gear assembly; the engine is connected with the planet carrier; the first coupler is connected with the inner gear ring group and the transmission gear, so that the inner gear ring group is combined with or disconnected from the transmission gear; the second coupler is connected with the inner gear ring set, the sun gear assembly and the gearbox shell so that the inner gear ring set can be combined with or disconnected from the sun gear assembly and the gearbox shell. The first differential mechanism is in transmission connection with the transmission gear and is connected with the first axle; the second motor is in transmission connection with the first differential mechanism; and the battery is electrically connected with the first motor and the second motor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicles, and particularly relates to a hybrid power driving system and a vehicle. BACKGROUND

[0002] With the increasing awareness of energy saving and environmental protection in today's society, new energy vehicle technology has begun to develop rapidly. Hybrid vehicle driving technology is the core stage of the development process of new energy vehicles. Improving fuel economy and reducing emissions are important issues faced by hybrid technology.

[0003] In the related art, the hybrid power driving system has multiple modes, but the switching between multiple modes is complex. SUMMARY

[0004] To solve the above technical problems, the present application provides a hybrid power driving system and a vehicle, which aims to at least solve the technical problem of complex switching between multiple modes of the hybrid power driving system.

[0005] The technical scheme of the present application is as follows:

[0006] A hybrid power driving system, comprising: a planetary gear mechanism, including an inner ring set, a sun gear assembly located at the center of the inner ring set, a plurality of planetary gears meshing between the inner ring set and the sun gear assembly, and a planetary carrier rotatingly connecting the plurality of planetary gears; a first motor connected with the sun gear assembly; an engine connected with the planetary carrier; a first coupler connected with the inner ring set and a transmission gear to combine or disconnect the inner ring set and the transmission gear; a second coupler connected with the inner ring set, the sun gear assembly and the transmission case to combine or disconnect the inner ring set, the sun gear assembly and the transmission case; a first differential connected with the transmission gear in transmission and connected with a first axle; a second motor connected with the first differential in transmission; and a battery electrically connected with the first motor and the second motor.

[0007] In some embodiments, the second coupler comprises: a first connecting portion connected with the inner ring set and switchable between a first position, a second position and a third position; a second connecting portion connected with the sun gear assembly; and a third connecting portion connected with the transmission case; wherein when the first connecting portion is located at the first position, the first connecting portion is combined with the third connecting portion, when the first connecting portion is located at the second position, the first connecting portion is disconnected from the third connecting portion and the second connecting portion, and when the first connecting portion is located at the third position, the first connecting portion is combined with the second connecting portion.

[0008] In some embodiments, the sun gear assembly includes: a sun gear located at the center of the inner ring gear group and meshing with multiple planetary gears; a first connecting shaft, one end of which is connected to the sun gear and the other end is connected to the first motor; wherein the first connecting shaft is arranged parallel to the first wheel axle, and the first connecting shaft is connected to the second connecting part.

[0009] In some embodiments, the inner ring gear set includes: an inner ring gear meshing with the plurality of planetary gears and connected to the first coupler; and an inner ring gear shaft connected to the inner ring gear and to the first connecting portion.

[0010] In some embodiments, the first differential is provided with a first main reduction driven gear, and the first main reduction driven gear, the second motor, and the transmission gear are connected in transmission via a first reduction gear mechanism.

[0011] In some embodiments, the first reduction gear mechanism includes: a first intermediate shaft, one end of which is provided with a first intermediate shaft gear meshing with the transmission gear, and the other end of which is provided with a first main reduction driving gear meshing with the first main reduction driven gear; wherein, the first intermediate shaft is arranged parallel to the first wheel axle, and the hybrid drive system also includes a second connecting shaft connected to the second motor, the second connecting shaft is provided with a first gear meshing with the first intermediate shaft gear, and the second connecting shaft is arranged parallel to the first intermediate shaft.

[0012] In some embodiments, the hybrid drive system further includes: a third motor electrically connected to the battery; a second differential drivingly connected to the third motor and connected to a second axle; wherein the second axle is arranged parallel to the first axle.

[0013] In some embodiments, the second differential is provided with a second main reduction driven gear, and the second main reduction driven gear is transmission-connected to the third motor via a second reduction gear mechanism.

[0014] In some embodiments, the second reduction gear mechanism includes: a second intermediate shaft, one end of which is provided with a second intermediate shaft gear, and the other end of which is provided with a second main reduction driving gear meshing with the second main reduction driven gear; wherein, the second intermediate shaft is arranged in parallel with the second wheel axle, and the hybrid drive system also includes a third connecting shaft connected to the third motor, the third connecting shaft is provided with a second gear meshing with the second intermediate shaft gear, and the third connecting shaft is arranged parallel to the second intermediate shaft.

[0015] Based on the same inventive concept, the present application also provides a vehicle comprising the hybrid drive system.

[0016] The beneficial effects of the present invention include at least:

[0017] Since the planetary gear mechanism includes an inner ring gear group, a sun gear assembly located at the center of the inner ring gear group, a plurality of planetary gears meshed between the inner ring gear group and the sun gear assembly, and a planetary gear carrier that rotatably connects the plurality of planetary gears; the first motor is connected to the sun gear assembly; the engine is connected to the planetary gear carrier; the first coupler is connected to the inner ring gear group and the transmission gear to enable the inner ring gear group to be coupled or disconnected from the transmission gear; the second coupler is connected to the inner ring gear group, the sun gear assembly and the transmission housing to enable the inner ring gear group to be coupled or disconnected from the sun gear assembly and the transmission housing; the first differential is transmission-connected to the transmission gear and is connected to the first axle; the second motor is transmission-connected to the first differential; and the battery is electrically connected to the first motor and the second motor.

[0018] Therefore, when EV (Electric Vehicle, pure electric) driving is performed, the first coupler disconnects the inner ring gear set from the transmission gear. At this time, the inner ring gear set is disconnected from the transmission gear, and the second coupler disconnects the inner ring gear set from the transmission housing and the sun gear assembly. The battery supplies power to the second motor to start the second motor. The power of the second motor is transmitted to the first axle through the first differential to drive the first axle to move, thereby realizing EV driving.

[0019] During the first series mode, the first coupler disconnects the ring gear assembly from the transmission gear. The second coupler connects the ring gear assembly to the transmission housing, causing the ring gear assembly to rotate at zero speed. This creates an overdrive gear with a speed ratio of less than 1 between the planetary carrier and the sun gear assembly. The engine starts, and the engine's power is transmitted to the first motor through the planetary carrier, planetary gears, and sun gear assembly, allowing the first motor to charge the battery. The battery powers the second motor, starting it. The second motor transmits power to the first differential, which in turn transmits power to the first axle, driving the first axle to achieve the first series mode. At this point, the engine's power and the second motor's power flows are completely decoupled, independently of each other.

[0020] In the second series mode, the first coupler disconnects the ring gear assembly from the transmission gear. The second coupler couples the ring gear assembly to the sun gear assembly, creating a 1:1 planetary gear ratio. The engine is started, and engine power is transmitted to the first motor through the planetary gear carrier, planetary gears, and sun gear assembly, enabling the first motor to charge the battery, thus achieving the second series mode.

[0021] During the first engine start mode, the first coupler disconnects the ring gear assembly from the transmission gear, disconnecting the ring gear assembly from the transmission gear. The second coupler connects the ring gear assembly to the transmission housing, connecting the ring gear assembly to the transmission housing. The ring gear assembly rotates at zero speed, creating an overdrive gear with a speed ratio of less than 1 between the planetary gear carrier and the sun gear assembly. The battery supplies power to the first motor, starting the first motor. The power from the first motor is transmitted to the engine through the sun gear assembly, planetary gears, and planetary gear carrier, driving the engine and achieving the first engine start mode.

[0022] During the second engine start mode, the first coupler disconnects the ring gear assembly from the transmission gear. The second coupler couples the ring gear assembly to the sun gear assembly, connecting the ring gear assembly and the sun gear assembly, creating a 1:1 planetary gear ratio. The battery supplies power to the first motor, starting it. The power from the first motor is then transferred to the engine via the sun gear assembly, planetary gears, and planetary gear carrier, driving the engine and achieving the second engine start mode.

[0023] In ECVT (Electronic Continuously Variable Transmission) mode, the first coupler couples the ring gear assembly with the transmission gear, connecting the ring gear assembly to the transmission gear. The second coupler disconnects the ring gear assembly from the transmission case and sun gear assembly, disconnecting the ring gear assembly from both. The engine starts, and engine power is transmitted through the planetary carrier and planetary gears to the ring gear assembly and sun gear assembly. The sun gear assembly then transmits power to the first motor, enabling the first motor to charge the battery. The ring gear assembly then transmits power through the transmission gear, which in turn transmits power to the first differential. The first differential then transmits power to the first axle, driving the first axle to achieve vehicle movement. This achieves engine power splitting, allowing the engine to drive while generating electricity while driving, thus achieving ECVT mode. At this point, the second motor can be activated. If activated, its power is transmitted to the first differential, increasing output power.

[0024] When in brake energy recovery mode, the first coupler disconnects the inner ring gear set from the transmission gear. At this time, the inner ring gear set is disconnected from the transmission gear, and the second coupler disconnects the inner ring gear set from the transmission housing and the sun gear assembly. The power of the engine will not be transmitted to the first differential. When the vehicle is in braking and coasting conditions, the kinetic energy of the wheel is transmitted to the first differential through the first axle, and the first differential is transmitted to the second motor. The torque of the second motor is reversed to charge the battery, thereby realizing brake energy recovery mode.

[0025] In engine-driven mode, the first coupler couples the ring gear assembly to the drive gear. At this point, the ring gear assembly is connected to the drive gear, and the second coupler couples the ring gear assembly to the sun gear assembly, creating a 1:1 planetary gear ratio. When the engine is started, engine power is transmitted to the first differential via the planetary carrier, planetary gears, ring gear assembly, and drive gear. The first differential then transmits power to the first axle, driving the first axle to achieve vehicle travel, thus achieving engine-driven mode.

[0026] In parallel drive mode, the first coupler couples the ring gear assembly to the drive gear, connecting the ring gear assembly to the drive gear. The second coupler couples the ring gear assembly to the sun gear assembly, creating a 1:1 planetary gear ratio. When the engine is started, power is transmitted to the first differential via the planetary carrier, planetary gears, ring gear assembly, and drive gear. The first differential then transmits power to the first axle. The battery supplies power to the second motor, which then transmits power to the first axle via the first differential. The engine power and the second motor power are combined at the first differential to drive the first axle, achieving parallel drive mode.

[0027] This application utilizes a planetary gear mechanism, a first coupler, and a second coupler to implement EV drive, a first series mode, a second series mode, a first engine start mode, a second engine start mode, an ECVT mode, a braking capacity recovery mode, an engine drive mode, and a parallel drive mode. The drive mode can be switched simply by disconnecting or connecting the first coupler and the second coupler, making mode switching simple. Furthermore, the absence of synchronizers, shift hubs, shift motors, and other mechanisms makes the overall structure of the hybrid drive system more compact, simplifies the system, reduces costs, and shortens the axial dimension of the hybrid drive system, facilitating layout and mounting. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 is a first structural schematic diagram of a hybrid drive system in some embodiments;

[0030] Figure 2 Schematic diagram of a second structure of a hybrid drive system in some embodiments.

[0031] In the attached figure:

[0032] Planetary gear mechanism 10, inner ring set 11, inner ring 111, inner ring shaft 112, sun wheel assembly 12, sun wheel 121, first connecting shaft 122, planetary gear 13, planetary gear carrier 14, transmission gear 15; First motor 20; Engine 30, crankshaft 31; First coupling 40; Second coupling 50, first connecting part 51, second connecting part 52, third connecting part 53; First differential 60, first main reduction driven gear 61; Second motor 70, second connecting shaft 71, first gear 72; Battery 80; First axle 90; First reduction gear mechanism 100, first intermediate shaft 101, first intermediate shaft gear 102, first main reduction driving gear 103; Fourth connecting shaft 110; Torsional vibration damper 120; Third motor 130, third connecting shaft 131, second gear 132; Second differential 140, second main reduction driven gear 141; Second axle 150; Second reduction gear mechanism 160, second intermediate shaft 161, second intermediate shaft gear 162, second main reduction driving gear 163. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] The present application is described below with reference to specific embodiments and with reference to the accompanying drawings:

[0038] The hybrid drive system and vehicle provided in the embodiments of the present application are intended to at least to some extent resolve the complex technical problem of switching between multiple modes of the hybrid drive system.

[0039] Figure 1 FIG1 is a first structural diagram of a hybrid drive system in some embodiments. Figure 1 The hybrid drive system of the present embodiment includes a planetary gear mechanism 10, a first motor 20, an engine 30, a first coupler 40, a second coupler 50, a first differential 60, a second motor 70, and a battery 80. The planetary gear mechanism 10 includes an internal ring gear assembly 11, a sun gear assembly 12 located at the center of the internal ring gear assembly 11, a plurality of planetary gears 13 meshing between the internal ring gear assembly 11 and the sun gear assembly 12, and a planetary gear carrier 14 rotatably connecting the plurality of planetary gears 13. The first motor 20 is connected to the sun gear assembly 12. The engine 30 is connected to the planetary gear carrier 14. The first coupler 40 is connected to the internal ring gear assembly 11 and the transmission gear 15 to connect or disconnect the internal ring gear assembly 11 from the transmission gear 15. The second coupler 50 is connected to the internal ring gear assembly 11, the sun gear assembly 12, and the transmission housing to connect or disconnect the internal ring gear assembly 11 from the sun gear assembly 12 and the transmission housing. The first differential 60 is in driving connection with the transmission gear 15 and is connected to the first axle 90. The second motor 70 is drivingly connected to the first differential 60. The battery 80 is electrically connected to the first motor 20 and the second motor 70.

[0040] The planetary gear mechanism 10 includes an inner ring gear assembly 11, a sun gear assembly 12 located at the center of the inner ring gear assembly 11, a plurality of planet gears 13 meshed between the inner ring gear assembly 11 and the sun gear assembly 12, and a planetary gear carrier 14 rotatably connecting the plurality of planet gears 13. A first motor 20 is connected to the sun gear assembly 12. An engine 30 is connected to the planetary gear carrier 14. A first coupler 40 is connected to the inner ring gear assembly 11 and the transmission gear 15 to couple or disconnect the inner ring gear assembly 11 with the transmission gear 15. A second coupler 50 is connected to the inner ring gear assembly 11, the sun gear assembly 12, and the transmission housing to couple or disconnect the inner ring gear assembly 11 with the sun gear assembly 12 and the transmission housing. A first differential 60 is in driving connection with the transmission gear 15 and is connected to the first axle 90. A second motor 70 is in driving connection with the first differential 60. A battery 80 is electrically connected to the first motor 20 and the second motor 70.

[0041] Therefore, when EV driving is performed, the first coupler 40 disconnects the inner ring gear set 11 from the transmission gear 15. At this time, the inner ring gear set 11 is disconnected from the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The battery 80 supplies power to the second motor 70 to start the second motor 70. The power of the second motor 70 is transmitted to the first axle 90 through the first differential 60 to drive the first axle 90 to move, thereby realizing EV driving.

[0042] During the first series transmission mode, the first coupler 40 disconnects the ring gear assembly 11 from the transmission gear 15. The second coupler 50 couples the ring gear assembly 11 to the transmission housing. The ring gear assembly 11 rotates at zero speed, creating an overdrive gear with a speed ratio less than 1 between the planetary carrier 14 and the sun gear assembly 12. The engine 30 is started, and its power is transmitted to the first motor 20 via the planetary carrier 14, the planetary gears 13, and the sun gear assembly 12, allowing the first motor 20 to charge the battery 80. The battery 80 then supplies power to the second motor 70, starting it. The second motor 70 then transmits power to the first differential 60, which in turn transmits power to the first axle 90, driving the first axle 90, thus achieving the first series transmission mode. At this point, the power flows of the engine 30 and the second motor 70 are completely decoupled and do not affect each other.

[0043] During the second series mode, first coupler 40 disconnects ring gear assembly 11 from transmission gear 15. Second coupler 50 couples ring gear assembly 11 to sun gear assembly 12, creating a 1:1 planetary gear ratio. Engine 30 is started, and its power is transmitted to first motor 20 via planetary carrier 14, planetary gears 13, and sun gear assembly 12, enabling first motor 20 to charge battery 80, thus achieving the second series mode.

[0044] During the first engine 30 start mode, the first coupler 40 disconnects the ring gear assembly 11 from the transmission gear 15. The second coupler 50 couples the ring gear assembly 11 to the transmission housing, connecting the ring gear assembly 11 to the transmission housing. The rotational speed of the ring gear assembly 11 is zero, and an overdrive gear with a speed ratio of less than 1 is formed between the planetary gear carrier 14 and the sun gear assembly 12. The battery 80 supplies power to the first motor 20, starting the first motor 20. The power of the first motor 20 is transmitted to the engine 30 via the sun gear assembly 12, the planetary gears 13, and the planetary gear carrier 14, driving the engine 30 and achieving the first engine 30 start mode.

[0045] During the second engine 30 starting mode, the first coupler 40 disconnects the ring gear assembly 11 from the transmission gear 15. The second coupler 50 couples the ring gear assembly 11 to the sun gear assembly 12, connecting the ring gear assembly 11 and the sun gear assembly 12 to achieve a 1:1 planetary gear ratio. The battery 80 supplies power to the first motor 20, starting the first motor 20. The power from the first motor 20 is transmitted to the engine 30 via the sun gear assembly 12, the planetary gears 13, and the planetary carrier 14, driving the engine 30 and achieving the second engine 30 starting mode.

[0046] When the ECVT mode is in progress, the first coupler 40 couples the inner ring gear set 11 with the transmission gear 15. At this time, the inner ring gear set 11 is connected to the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The inner ring gear set 11 is not connected to the transmission housing and the sun gear assembly 12. The engine 30 is started, and the power of the engine 30 is transmitted to the inner ring gear set 11 and the sun gear assembly 12 through the planetary carrier 14 and the planetary gears 13. The sun gear assembly 12 transmits power to the first motor 20, so that the first motor 20 charges the battery 80. The inner ring gear set 11 transmits power through the transmission gear 15, and the transmission gear 15 transmits power to the first differential 60. The first differential 60 transmits power to the first axle 90 to drive the first axle 90 to move, thereby realizing vehicle travel, realizing power diversion of the engine 30, and realizing that the engine 30 drives while generating electricity while driving, thereby realizing ECVT mode. At this time, it can be selected whether to start the second motor 70. If the second motor 70 is started, the power of the second motor 70 can be transmitted to the first differential 60, thereby increasing the output power.

[0047] When the braking energy recovery mode is in progress, the first coupler 40 disconnects the inner ring gear set 11 from the transmission gear 15. At this time, the inner ring gear set 11 is disconnected from the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The power of the engine 30 will not be transmitted to the first differential 60. When the vehicle is in braking and coasting conditions, the kinetic energy of the wheel is transmitted to the first differential 60 through the first wheel axle 90, and the first differential 60 is transmitted to the second motor 70. The torque of the second motor 70 is reversed to charge the battery 80, thereby realizing the braking energy recovery mode.

[0048] In engine 30 drive mode, first coupler 40 couples ring gear assembly 11 with transmission gear 15. At this point, ring gear assembly 11 is connected to transmission gear 15, and second coupler 50 couples ring gear assembly 11 with sun gear assembly 12, creating a 1:1 planetary gear ratio. When engine 30 is started, power from engine 30 is transmitted to first differential 60 via planetary carrier 14, planetary gears 13, ring gear assembly 11, and transmission gear 15. First differential 60 then transmits power to first axle 90, driving first axle 90 to achieve vehicle travel, thus achieving engine 30 drive mode.

[0049] In parallel drive mode, the first coupler 40 couples the ring gear assembly 11 to the transmission gear 15. At this point, the ring gear assembly 11 is connected to the transmission gear 15, and the second coupler 50 couples the ring gear assembly 11 to the sun gear assembly 12, creating a 1:1 planetary gear ratio. The engine 30 is started, and its power is transmitted to the first differential 60 via the planetary carrier 14, planetary gears 13, the ring gear assembly 11, and the transmission gear 15. The first differential 60 then transmits power to the first axle 90. The battery 80 supplies power to the second motor 70, which is then transmitted to the first axle 90 via the first differential 60. The power of the engine 30 and the power of the second motor 70 are combined at the first differential 60 to drive the first axle 90, achieving parallel drive mode.

[0050] This application utilizes a planetary gear mechanism 10, a first coupler 40, and a second coupler 50 to implement EV drive, a first series mode, a second series mode, a first engine start mode, a second engine start mode, an ECVT mode, a braking capacity recovery mode, an engine drive mode, and a parallel drive mode. Switching drive modes can be achieved simply by disconnecting or connecting the first coupler 40 and the second coupler 50, making mode switching simple. Furthermore, the absence of synchronizers, shift hubs, shift motors, and other mechanisms makes the overall structure of the hybrid drive system more compact, simplifies the system, reduces costs, and shortens the axial dimension of the hybrid drive system, facilitating layout and mounting.

[0051] In some embodiments, the first coupler 40 may be a one-way clutch or a magnetic clutch with a one-way locking function or a two-position off-on power coupling device. The second coupler 50 may be a three-position power coupling device such as a bilateral synchronizer or a three-position electromagnetic clutch.

[0052] Combine Figure 1 In some embodiments, in order to achieve the connection or disconnection between the inner ring gear set 11, the sun gear assembly 12 and the transmission housing, the second coupler 50 includes: a first connection part 51, a second connection part 52 and a third connection part 53. The first connection part 51 is connected to the inner ring gear set 11 and can be switched between a first position, a second position and a third position. The second connection part 52 is connected to the sun gear assembly 12. The third connection part 53 is connected to the transmission housing. When the first connection part 51 is in the first position, the first connection part 51 is connected to the third connection part 53; when the first connection part 51 is in the second position, the first connection part 51 is disconnected from the third connection part 53 and the second connection part 52; when the first connection part 51 is in the third position, the first connection part 51 is connected to the second connection part 52.

[0053] When the first connecting portion 51 is in the first position, the first connecting portion 51 is engaged with the third connecting portion 53 and disconnected from the second connecting portion 52. At this point, the internal gear assembly 11 is connected to the transmission housing, but disconnected from the sun gear assembly 12. When the first connecting portion 51 is in the second position, the first connecting portion 51 is disconnected from the third connecting portion 53 and the second connecting portion 52. At this point, the internal gear assembly 11 is disconnected from both the transmission housing and the sun gear assembly 12. When the first connecting portion 51 is in the third position, the first connecting portion 51 is engaged with the second connecting portion 52. At this point, the internal gear assembly 11 is connected to the sun gear assembly 12, but disconnected from the transmission housing.

[0054] A hybrid drive system operating state table, wherein 0 represents disconnection and 1 represents connection.

[0055] Driving Mode First coupler First connecting part EV / Brake Energy Regeneration 0 Second position First series mode 0 First position Second series mode 0 Third position Start the engine 0 First position ECVT 1 Second position Engine driven / parallel 1 Third position

[0056] Combine Figure 1 In some embodiments, to achieve power transmission, the sun gear assembly 12 includes a sun gear 121 and a first connecting shaft 122. Sun gear 121 is located at the center of the ring gear assembly 11 and meshes with the plurality of planetary gears 13. One end of the first connecting shaft 122 is connected to the sun gear 121, and the other end is connected to the first motor 20. The first connecting shaft 122 is arranged parallel to the first axle 90 and is connected to the second connecting portion 52.

[0057] The sun gear 121 can transmit power to the first motor 20 through the first connecting shaft 122 , and the power of the first motor 20 can also be transmitted to the sun gear 121 through the first connecting shaft 122 .

[0058] Combine Figure 1 In some embodiments, to achieve power transmission, the inner ring gear assembly 11 includes an inner ring gear 111 and an inner ring gear shaft 112. The inner ring gear 111 is engaged with the plurality of planetary gears 13 and connected to the first coupler 40. The inner ring gear shaft 112 is connected to the inner ring gear 111 and to the first connecting portion 51.

[0059] When the first connecting portion 51 is in the first position, the first connecting portion 51 is engaged with the third connecting portion 53 and disconnected from the second connecting portion 52. At this time, the ring gear shaft 112 connects the ring gear 111 to the transmission case, while disconnecting the ring gear 111 from the sun gear assembly 12. When the first connecting portion 51 is in the second position, the first connecting portion 51 is disconnected from both the third connecting portion 53 and the second connecting portion 52. At this time, the ring gear shaft 112 disconnects the ring gear 111 from both the transmission case and the sun gear assembly 12. When the first connecting portion 51 is in the third position, the first connecting portion 51 is engaged with the second connecting portion 52. At this time, the ring gear shaft 112 connects the ring gear 111 to the sun gear assembly 12, while disconnecting the ring gear 111 from the transmission case.

[0060] Combine Figure 1 In some embodiments, in order to achieve power transmission, the first differential 60 is provided with a first main reduction driven gear 61 , and the first main reduction driven gear 61 and the second motor 70 and the transmission gear 15 are connected through a first reduction gear mechanism 100 .

[0061] When the engine 30 or the second motor 70 transmits power to the first differential 60, the power of the transmission gear 15 or the second motor 70 can be transmitted to the first main reduction driven gear 61 through the first reduction gear mechanism 100, and the first main reduction driven gear 61 transmits the power to the first wheel axle 90 through the first differential 60.

[0062] Combine Figure 1 In some embodiments, to achieve power transmission, the first reduction gear mechanism 100 includes a first intermediate shaft 101. One end of the first intermediate shaft 101 is provided with a first intermediate shaft gear 102 that meshes with the transmission gear 15, and the other end is provided with a first main reduction driving gear 103 that meshes with the first main reduction driven gear 61. The first intermediate shaft 101 is disposed parallel to the first axle 90. The hybrid drive system further includes a second connecting shaft 71 connected to the second motor 70. The second connecting shaft 71 is provided with a first gear 72 that meshes with the first intermediate shaft gear 102. The second connecting shaft 71 is disposed parallel to the first intermediate shaft 101.

[0063] When the engine 30 or the second motor 70 transmits power to the first differential 60, the transmission gear 15 can transmit the power to the first intermediate shaft 101 through the first intermediate shaft gear 102. The second motor 70 can transmit the power to the first intermediate shaft 101 through the second connecting shaft 71, the first gear 72, and the first intermediate shaft gear 102. The first intermediate shaft 101 drives the first main reducer driving gear 103 to rotate. The first main reducer driving gear 103 drives the first main reducer driven gear 61 to rotate. The first main reducer driven gear 61 transmits the power to the first wheel axle 90 through the first differential 60 to drive the vehicle.

[0064] When the braking energy recovery mode is in progress, the first axle 90 drives the second motor 70 through the first differential 60, the first main reduction driven gear 61, the first main reduction driving gear 103, the first intermediate shaft 101, the first intermediate shaft gear 102, the first gear 72 and the second connecting shaft 71, and the second motor 70 charges the electromagnet 80.

[0065] Combine Figure 1 In some embodiments, to achieve power transmission, the hybrid drive system further includes a fourth connecting shaft 110. One end of the fourth connecting shaft 110 is connected to the crankshaft 31 of the engine 30, and the other end is connected to the planetary wheel carrier 14. The fourth connecting shaft 110 is arranged parallel to the first axle 90.

[0066] The power of the engine 30 can be transmitted to the fourth connecting shaft 110 through the crankshaft 31 , and the fourth connecting shaft 110 can transmit the power to the planetary carrier 14 .

[0067] The crankshaft 31 of the engine 30 generates periodic torsional vibrations under the action of combustion explosion and reciprocating inertia force. If it is directly transmitted to the fourth connecting shaft 110, it will cause gear meshing impact, transmission belt vibration or motor rotor resonance. Figure 1 In some embodiments, in order to improve the NVH (noise, vibration and harshness) performance, the fourth connecting shaft 110 is connected to the crankshaft 31 through a torsional vibration damper 120. The torsional vibration damper 120 absorbs vibration energy through elastic elements (such as rubber, springs) and damping elements (such as silicone oil), and attenuates the torsional vibration amplitude to an allowable range, thereby improving NVH. At the same time, through elastic buffering and damping attenuation, the torque transmission is smoother, and the impact and setbacks are reduced.

[0068] Figure 2 FIG2 is a second structural diagram of a hybrid drive system in some embodiments. Figure 2In some embodiments, to enable multiple drive modes of the hybrid drive system, the hybrid drive system further includes: a third motor 130 and a second differential 140. The third motor 130 is electrically connected to the battery 80. The second differential 140 is drivingly connected to the third motor 130 and to the second axle 150. The second axle 150 is arranged parallel to the first axle 90.

[0069] When the first four-wheel drive mode is in operation, the first coupler 40 disconnects the inner ring gear set 11 from the transmission gear 15. At this time, the inner ring gear set 11 is disconnected from the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The engine 30 is turned off, the first motor 20 is turned off, and the battery 80 supplies power to the second motor 70 and the third motor 130. The second motor 70 and the third motor 130 are started, and the power of the second motor 70 is transmitted to the first axle 90 through the first differential 60 to drive the first axle 90 to move. The power of the third motor 130 is transmitted to the second axle 150 through the second differential 140 to drive the second axle 150 to move, thereby realizing the first four-wheel drive mode.

[0070] When the second four-wheel drive mode is in progress, the first coupler 40 couples the inner ring gear set 11 with the transmission gear 15. At this time, the inner ring gear set 11 is connected to the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The engine 30 is started, and the power of the engine 30 is transmitted to the inner ring gear set 11 and the sun gear assembly 12 through the planetary wheel carrier 14 and the planetary gear 13. The sun gear assembly 12 transmits power to the first motor 20, so that the first motor 20 charges the battery 80. The inner ring gear set 11 transmits power through the transmission gear 1 5. The transmission gear 15 transmits power to the first differential 60. The first differential 60 transmits power to the first axle 90 to drive the first axle 90 to move. The battery 80 supplies power to the second motor 70 and the third motor 130. The second motor 70 and the third motor 130 are started. The power of the second motor 70 is transmitted to the first axle 90 through the first differential 60 to drive the first axle 90 to move. The power of the third motor 130 is transmitted to the second axle 150 through the second differential 140 to drive the second axle 150 to move, thereby realizing the second four-wheel drive mode.

[0071] When the third four-wheel drive mode is in progress, the first coupler 40 combines the inner ring gear set 11 with the transmission gear 15. At this time, the inner ring gear set 11 is connected to the transmission gear 15, and the second coupler 50 combines the inner ring gear set 11 with the sun gear assembly 12. The engine 30 is started, and the power of the engine 30 is transmitted to the inner ring gear set 11 through the planetary carrier 14 and the planetary gear 13. The inner ring gear set 11 transmits the power through the transmission gear 15, and the transmission gear 15 transmits the power to the first differential 60. The first differential 60 transmits the power to the first axle 90 to drive the first axle 90 to move. The second motor 70 is turned off, and the battery 80 supplies power to the third motor 130. The third motor 130 is started, and the power of the third motor 130 is transmitted to the second axle 150 through the second differential 140 to drive the second axle 150 to move, thereby realizing the third four-wheel drive mode.

[0072] When the fourth four-wheel drive mode is in operation, the first coupler 40 couples the inner ring gear set 11 with the transmission gear 15. At this time, the inner ring gear set 11 is connected to the transmission gear 15, and the second coupler 50 couples the inner ring gear set 11 with the sun gear assembly 12. The engine 30 is started, and the power of the engine 30 is transmitted to the inner ring gear set 11 through the planetary carrier 14 and the planetary gears 13. The inner ring gear set 11 transmits the power through the transmission gear 15, and the transmission gear 15 transmits the power to the first differential 60. The first differential 60 transmits the power to the first axle 90 to drive the first axle 90 to move. The battery 80 supplies power to the second motor 70 and the third motor 130. The second motor 70 and the third motor 130 are started, and the power of the second motor 70 is transmitted to the first axle 90 through the first differential 60 to drive the first axle 90 to move. The power of the third motor 130 is transmitted to the second axle 150 through the second differential 140 to drive the second axle 150 to move, thereby achieving the fourth four-wheel drive mode.

[0073] When in EV front-wheel drive mode, the third motor 130 is turned off, and the first coupler 40 disconnects the inner ring gear set 11 from the transmission gear 15. At this time, the inner ring gear set 11 is disconnected from the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The battery 80 supplies power to the second motor 70, starts the second motor 70, and the power of the second motor 70 is transmitted to the first axle 90 through the first differential 60 to drive the first axle 90 to move, thereby realizing EV front-wheel drive.

[0074] When performing front-wheel drive brake energy recovery, the third motor 130 is turned off, and the first coupler 40 disconnects the inner ring gear set 11 from the transmission gear 15. At this time, the inner ring gear set 11 is disconnected from the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The power of the engine 30 will not be transmitted to the first differential 60. When the vehicle is in braking and coasting conditions, the kinetic energy of the wheel is transmitted to the first differential 60 through the first axle 90, and the first differential 60 is transmitted to the second motor 70. The torque of the second motor 70 is reversed to charge the battery 80, thereby realizing the front-wheel drive brake energy recovery mode.

[0075] When the EV rear-wheel drive mode is in operation, the first coupler 40 disconnects the inner ring gear set 11 from the transmission gear 15. At this time, the inner ring gear set 11 is disconnected from the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The engine 30, the first motor 20, and the second motor 70 are turned off, and the battery 80 supplies power to the third motor 130. The third motor 130 is started, and the power of the third motor 130 is transmitted to the second axle 150 through the second differential 140 to drive the second axle 150 to move, thereby realizing the EV rear-wheel drive mode.

[0076] When performing rear-wheel drive braking energy recovery, the first coupler 40 disconnects the inner ring gear set 11 from the transmission gear 15. At this time, the inner ring gear set 11 and the transmission gear 15 are disconnected, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12, and the engine 30, the first motor 20, and the second motor 70 are turned off. When the vehicle is in braking and coasting conditions, the kinetic energy of the wheels is transmitted to the second differential 140 through the second wheel axle 150, and the second differential 140 is transmitted to the third motor 130. The torque of the third motor 130 is reversed to charge the battery 80, thereby realizing the rear-wheel drive braking energy recovery mode.

[0077] When the first series mode is performed, the third motor 130 can be selectively started or stopped.

[0078] When the second series mode is in progress, the third motor 130 can be selectively started or stopped.

[0079] When the engine driving mode is in progress, the third motor 130 can be selectively started or shut down.

[0080] When the ECVT mode is engaged, the third electric machine 130 is turned off.

[0081] When the engine drive mode and the parallel drive mode are performed, the third motor 130 is turned off.

[0082] A hybrid drive system operating state table, wherein 0 represents disconnection, 1 represents engagement, off represents shutdown, and on represents start.

[0083]

[0084] Combine Figure 2 In some embodiments, in order to achieve power transmission, the second differential 140 is provided with a second main reduction driven gear 141 , and the second main reduction driven gear 141 is connected to the third motor 130 via a second reduction gear mechanism 160 .

[0085] When the third motor 130 transmits power to the second differential 140 , the power of the third motor 130 can be transmitted to the second main reduction driven gear 141 through the second reduction gear mechanism 160 , and the second main reduction driven gear 141 transmits the power to the second axle 150 through the second differential 140 .

[0086] Combine Figure 2 In some embodiments, to achieve power transmission, the second reduction gear mechanism 160 includes a second intermediate shaft 161. A second intermediate shaft gear 162 is provided at one end of the second intermediate shaft 161, and a second main reduction driving gear 163 is provided at the other end, meshing with the second main reduction driven gear 141. The second intermediate shaft 161 is disposed parallel to the second axle 150. The hybrid drive system further includes a third connecting shaft 131 connected to the third motor 130. The third connecting shaft 131 is provided with a second gear 132 meshing with the second intermediate shaft gear 162, and the third connecting shaft 131 is disposed parallel to the second intermediate shaft 161.

[0087] When the third motor 130 transmits power to the second differential 140, the third motor 130 can transmit the power to the second intermediate shaft 161 through the third connecting shaft 131, the second gear 132, and the second intermediate shaft gear 162. The second intermediate shaft 161 drives the second main reducer driving gear 163 to rotate, and the second main reducer driving gear 163 drives the second main reducer driven gear 141 to rotate. The second main reducer driven gear 141 transmits the power to the second wheel axle 150 through the second differential 140 to drive the vehicle.

[0088] Of course, when performing EV rear-wheel drive braking energy recovery, the second wheel axle 150 drives the third motor 130 through the second differential 140, the second main reduction driven gear 141, the second main reduction driving gear 163, the second intermediate shaft 161, the second intermediate shaft gear 162, the second gear 132 and the third connecting shaft 131, so that the third motor 130 can charge the battery 80.

[0089] Based on the same inventive concept, the present application also proposes a vehicle, which adopts the hybrid drive system. The specific structure of the hybrid drive system refers to the above-mentioned embodiment. Since all the technical solutions of all the above-mentioned embodiments are adopted, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0090] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0091] In the description of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0093] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0094] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A hybrid drive system, characterized in that: include: A planetary gear mechanism comprising an inner ring gear set, a sun gear assembly located at the center of the inner ring gear set, a plurality of planetary gears meshed between the inner ring gear set and the sun gear assembly, and a planetary gear carrier rotatably connecting the plurality of planetary gears; a first motor connected to the sun gear assembly; an engine connected to the planetary wheel carrier; a first coupler connected to the inner ring gear set and the transmission gear to couple or disconnect the inner ring gear set with the transmission gear; a second coupler connected to the inner ring gear set, the sun gear assembly, and the transmission housing to couple or disconnect the inner ring gear set with the sun gear assembly and the transmission housing; a first differential, drivingly connected to the transmission gear and connected to the first wheel axle; a second motor, drivingly connected to the first differential; A battery is electrically connected to the first motor and the second motor.

2. The hybrid drive system according to claim 1, characterized in that: The second coupler comprises: a first connecting portion connected to the inner gear ring assembly and capable of switching between a first position, a second position, and a third position; a second connecting portion connected to the sun gear assembly; a third connecting portion connected to the gearbox housing; In which, when the first connection part is located at the first position, the first connection part is combined with the third connection part; when the first connection part is located at the second position, the first connection part is disconnected from the third connection part and the second connection part; when the first connection part is located at the third position, the first connection part is combined with the second connection part.

3. The hybrid drive system according to claim 2, characterized in that: The sun gear assembly comprises: a sun gear located at the center of the inner ring gear set and meshing with the plurality of planetary gears; a first connecting shaft, one end of which is connected to the sun gear, and the other end of which is connected to the first motor; Wherein, the first connecting shaft is arranged parallel to the first wheel axle, and the first connecting shaft is connected to the second connecting portion.

4. The hybrid drive system according to claim 2, characterized in that: The inner ring gear assembly comprises: an inner ring gear meshing with the plurality of planetary gears and connected to the first coupler; The inner gear ring shaft is connected to the inner gear ring and to the first connecting portion.

5. The hybrid drive system according to any one of claims 1 to 4, characterized in that: The first differential is provided with a first main reduction driven gear, and the first main reduction driven gear, the second motor and the transmission gear are transmission-connected via a first reduction gear mechanism.

6. The hybrid drive system according to claim 5, characterized in that: The first reduction gear mechanism comprises: a first intermediate shaft, one end of which is provided with a first intermediate shaft gear meshing with the transmission gear, and the other end of which is provided with a first main reducer driving gear meshing with the first main reducer driven gear; In which, the first intermediate shaft is arranged parallel to the first wheel axle, and the hybrid drive system also includes a second connecting shaft connected to the second motor, the second connecting shaft is provided with a first gear meshing with the first intermediate shaft gear, and the second connecting shaft is arranged parallel to the first intermediate shaft.

7. The hybrid drive system according to any one of claims 1 to 4, characterized in that: The hybrid drive system further includes: a third motor, electrically connected to the battery; a second differential, drivingly connected to the third motor and connected to the second wheel axle; Wherein, the second axle is arranged parallel to the first axle.

8. The hybrid drive system according to claim 7, characterized in that: The second differential is provided with a second main reduction driven gear, and the second main reduction driven gear is transmission-connected to the third motor via a second reduction gear mechanism.

9. The hybrid drive system according to claim 8, characterized in that: The second reduction gear mechanism comprises: a second intermediate shaft having a second intermediate shaft gear at one end and a second main reducer driving gear meshing with the second main reducer driven gear at the other end; Among them, the second intermediate shaft is arranged parallel to the second wheel axle, and the hybrid drive system also includes a third connecting shaft connected to the third motor, the third connecting shaft is provided with a second gear meshing with the second intermediate shaft gear, and the third connecting shaft is arranged parallel to the second intermediate shaft.

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

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