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, a sun gear located in the center of the inner gear ring, a plurality of planet gears meshed between the inner gear ring and the sun gear, and a planet carrier rotationally connected with the planet gears; the first motor is connected with the sun gear; the engine is connected with the planet carrier; the first coupler is connected with the inner gear ring and the transmission gear, so that the inner gear ring and the transmission gear are combined or disconnected; the second coupler is connected with the inner gear ring and the gearbox shell so that the inner gear ring and the gearbox shell can be combined or disconnected; 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 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 developed 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 the multiple modes is complex. SUMMARY

[0004] To solve the above technical problems, the 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 application is as follows:

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

[0007] In some embodiments, the first differential is provided with a first main reduction driven gear, and the first main reduction driven gear and the second motor are connected in transmission with the transmission gear through a first reduction gear mechanism.

[0008] In some embodiments, the first reduction gear mechanism comprises: a first intermediate shaft provided at one end with a first intermediate shaft gear meshing with the transmission gear and at the other end with a first main reduction driving gear meshing with the first main reduction driven gear; wherein the first intermediate shaft is arranged in parallel with the first axle, and the hybrid power driving system further comprises a first connecting shaft connected with the second motor, the first connecting shaft being provided with a first gear meshing with the first intermediate shaft gear, and the first connecting shaft being arranged in parallel with the first intermediate shaft.

[0009] In some embodiments, the first coupling and the second coupling are arranged in parallel along an axial direction of the first axle.

[0010] In some embodiments, the hybrid drive system further comprises a second connecting shaft, one end of which is connected to the crankshaft of the engine and the other end of which is connected to the planet carrier, and a third connecting shaft, one end of which is connected to the first motor and the other end of which is connected to the sun gear, wherein the second connecting shaft is coaxially arranged with the third connecting shaft, and the second connecting shaft is arranged in parallel with the first axle.

[0011] In some embodiments, the second connecting shaft is connected to the crankshaft through a torsional vibration damper.

[0012] In some embodiments, the hybrid drive system further comprises a third motor electrically connected to the battery, and a second differential gear connected to the third motor in transmission and connected to a second axle, wherein the second axle is arranged in parallel with the first axle.

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

[0014] In some embodiments, the second reduction gear mechanism comprises 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 axle, and the hybrid drive system further comprises a fourth connecting shaft connected to the third motor, the fourth connecting shaft being provided with a second gear meshing with the second intermediate shaft gear, and the fourth connecting shaft being arranged in parallel with the second intermediate shaft.

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

[0016] The application has at least the following beneficial effects:

[0017] Since the planetary gear mechanism comprises an inner ring gear, a sun gear located at the center of the inner ring gear, a plurality of planet gears meshing between the inner ring gear and the sun gear, and a planet carrier rotatingly connecting the plurality of planet gears, the first motor is connected to the sun gear, the engine is connected to the planet carrier, the first coupling is connected to the inner ring gear and the transmission gear to combine or disconnect the inner ring gear and the transmission gear, the second coupling is connected to the inner ring gear and the transmission case to combine or disconnect the inner ring gear and the transmission case, the first differential gear is connected to the transmission gear in transmission and connected to the first axle, the second motor is connected to the first differential gear in transmission, and the battery is electrically connected to the first motor and the second motor.

[0018] Therefore, when EV (Electric Vehicle) driving is performed, the first coupling device disconnects the inner ring gear from the transmission gear, at this time, the inner ring gear is disconnected from the transmission gear without connection, the second coupling device disconnects the inner ring gear from the transmission case, the battery supplies power to the second motor, the second motor is started, the second motor transmits power to the first differential, the first differential transmits power to the first axle shaft, to drive the first axle shaft to move, to realize EV driving.

[0019] When series mode is performed, the first coupling device disconnects the inner ring gear from the transmission gear, at this time, the inner ring gear is disconnected from the transmission gear without connection, the second coupling device connects the inner ring gear with the transmission case, the inner ring gear is connected with the transmission case, the inner ring gear has a speed of 0, at this time, a speed ratio less than 1 is formed between the planet carrier and the sun gear, the engine is started, the power of the engine is transmitted to the planet carrier, the planet carrier transmits power to the planet gear, the planet gear transmits power to the sun gear, the sun gear transmits power to the first motor, so that the first motor charges the battery. The battery supplies power to the second motor, the second motor is started, the second motor transmits power to the first differential, the first differential transmits power to the first axle shaft, to drive the first axle shaft to move, to realize series mode. At this time, the power of the engine and the power of the second motor are completely decoupled and do not affect each other.

[0020] When the engine is started, the first coupling device disconnects the inner ring gear from the transmission gear, at this time, the inner ring gear is disconnected from the transmission gear without connection, the second coupling device connects the inner ring gear with the transmission case, the inner ring gear is connected with the transmission case, the inner ring gear has a speed of 0, at this time, a speed ratio less than 1 is formed between the planet carrier and the sun gear, the battery supplies power to the first motor, the first motor is started, the power of the first motor is transmitted to the engine through the sun gear, the planet gear and the planet carrier, to start the engine.

[0021] In the ECVT (Electronic Continuously Variable Transmission) mode, the first coupling connects the inner ring gear with the transmission gear, at this time, the inner ring gear is connected with the transmission gear, the second coupling disconnects the inner ring gear with the transmission housing, the engine is started, the power of the engine is transmitted to the planetary carrier, the planetary carrier transmits the power to the sun gear and the inner ring gear, the sun gear transmits the power to the first motor, so that the first motor charges the battery, the inner ring gear transmits the power to the transmission gear through the first coupling, the transmission gear transmits the power to the first differential, the first differential transmits the power to the first axle to drive the first axle to move, so as to realize the vehicle driving, the power of the engine is split, the engine drives and generates electricity at the same time, so as to realize the ECVT mode. At this time, it can be selected whether to start the second motor, if the second motor is started, the power of the second motor can be transmitted to the first differential to increase the output power.

[0022] In the brake energy recovery mode, the first coupling disconnects the inner ring gear with the transmission gear, at this time, the inner ring gear is disconnected with the transmission gear, the second coupling disconnects the inner ring gear with the transmission housing, the power of the engine will not be transmitted to the differential, when the vehicle is in braking and coasting condition, the kinetic energy of the wheel is transmitted to the first differential through the first axle, the first differential transmits the power to the second motor, the second motor reverses the torque to charge the battery, so as to realize the brake energy recovery mode.

[0023] The application uses a planetary gear mechanism, a first coupling and a second coupling to realize EV driving, series mode, starting engine, ECVT mode and brake energy recovery mode, only the disconnection or connection of the first coupling and the second coupling is needed to realize the switching of the driving mode, the mode switching is simple. Moreover, there is no shift hub, shift motor and other mechanisms, so that the overall structure of the hybrid power driving system is more compact, the system is simplified, the cost is reduced, at the same time, the axial dimension of the hybrid power driving system is shortened, which is beneficial to the arrangement and mounting. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced, obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creating labor.

[0025] Figure 1 The first structure schematic view of the hybrid power driving system of some embodiments;

[0026] Figure 2A second configuration diagram of a hybrid drive system of some embodiments.

[0027] In the drawings:

[0028] Planetary gear mechanism 10, ring gear 11, sun gear 12, planet gears 13, planet carrier 14, drive gear 15; first motor 20; engine 30, crankshaft 31; first coupling 40; second coupling 50; first differential 60, first main reduction driven gear 61; second motor 70, first 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; second connecting shaft 110; third connecting shaft 120; torsional damper 130; third motor 140; second differential 150, second main reduction driven gear 151; second axle 160; second reduction gear mechanism 170, second intermediate shaft 171, second intermediate shaft gear 172, second main reduction driving gear 173; fourth connecting shaft 180, second gear 181. DETAILED DESCRIPTION

[0029] 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 some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0030] 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.

[0031] 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 the internal connection of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0032] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0033] The present application will be described below in conjunction with the accompanying drawings and specific embodiments:

[0034] The hybrid drive system and vehicle provided by the embodiment can at least solve the technical problem of complex switching between multiple modes of the hybrid drive system to some extent.

[0035] Figure 1 The first structure diagram of the hybrid drive system of some embodiments. In combination Figure 1 The hybrid drive system of the embodiment includes a planetary gear mechanism 10, a first motor 20, an engine 30, a first coupling 40, a second coupling 50, a first differential 60, a second motor 70 and a battery 80. The planetary gear mechanism 10 includes an inner ring gear 11, a sun gear 12 located at the center of the inner ring gear 11, a plurality of planetary gears 13 engaged between the inner ring gear 11 and the sun gear 12, and a planetary carrier 14 connected to the plurality of planetary gears 13. The first motor 20 is connected to the sun gear 12. The engine 30 is connected to the planetary carrier 14. The first coupling 40 is connected to the inner ring gear 11 and a transmission gear 15 to combine or disconnect the inner ring gear 11 and the transmission gear 15. The second coupling 50 is connected to the inner ring gear 11 and a transmission housing to combine or disconnect the inner ring gear 11 and the transmission housing. The first differential 60 is in driving connection with the transmission gear 15 and connected to a first axle 90. The second motor 70 is in driving connection with the first differential 60. The battery 80 is electrically connected to the first motor 20 and the second motor 70.

[0036] Since the planetary gear mechanism 10 comprises an inner ring gear 11, a sun gear 12 located at the center of the inner ring gear 11, a plurality of planetary gears 13 engaged between the inner ring gear 11 and the sun gear 12, and a planetary gear carrier 14 rotationally connected to the plurality of planetary gears 13, the first motor 20 is connected to the sun gear 12, the engine 30 is connected to the planetary gear carrier 14, the first coupling 40 is connected to the inner ring gear 11 and the drive gear 15 to make the inner ring gear 11 combined with or disconnected from the drive gear 15, the second coupling 50 is connected to the inner ring gear 11 and the transmission housing to make the inner ring gear 11 combined with or disconnected from the transmission housing, the first differential 60 is drivingly connected to the drive gear 15 and connected to the first axle 90, the second motor 70 is drivingly connected to the first differential 60, and the battery 80 is electrically connected to the first motor 20 and the second motor 70.

[0037] Therefore, when EV driving is performed, the first coupling 40 disconnects the inner ring gear 11 from the drive gear 15, at this time, the inner ring gear 11 is disconnected from the drive gear 15 without connection, the second coupling 50 disconnects the inner ring gear 11 from the transmission housing, the battery 80 supplies power to the second motor 70, starts the second motor 70, the second motor 70 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 to realize EV driving.

[0038] When series mode is performed, the first coupling 40 disconnects the inner ring gear 11 from the drive gear 15, at this time, the inner ring gear 11 is disconnected from the drive gear 15 without connection, the second coupling 50 connects the inner ring gear 11 to the transmission housing, the inner ring gear 11 is connected to the transmission housing, the inner ring gear 11 has a speed of 0, at this time, a speed ratio less than 1 is formed between the planetary gear carrier 14 and the sun gear 12, the engine 30 is started, the power of the engine 30 is transmitted to the planetary gear carrier 14, the planetary gear carrier 14 transmits power to the planetary gears 13, the planetary gears 13 transmit power to the sun gear 12, the sun gear 12 transmits power to the first motor 20 to charge the battery 80. The battery 80 supplies power to the second motor 70, starts the second motor 70, the second motor 70 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 to realize series mode. At this time, the power of the engine 30 and the power of the second motor 70 are completely decoupled and do not affect each other.

[0039] When starting the engine 30, the first coupling 40 disconnects the inner ring 11 from the transmission gear 15, at this time, the inner ring 11 is disconnected from the transmission gear 15, the second coupling 50 connects the inner ring 11 with the transmission housing, the inner ring 11 is connected with the transmission housing, the inner ring 11 is at 0 speed, at this time, the planetary carrier 143 to the sun gear 12 forms an overdrive with a speed ratio less than 1, the battery 80 supplies power to the first motor 20, the first motor 20 is started, and the power of the first motor 20 is transmitted to the engine 30 through the sun gear 12, the planetary gear 13 and the planetary carrier 14 to start the engine 30.

[0040] When the ECVT mode is performed, the first coupling 40 connects the inner ring 11 with the transmission gear 15, at this time, the inner ring 11 is connected with the transmission gear 15, the second coupling 50 disconnects the inner ring 11 from the transmission housing, the engine 30 is started, the power of the engine 30 is transmitted to the planetary gear 13 through the planetary carrier, the planetary gear 13 transmits the power to the sun gear 12 and the inner ring 11 respectively, the sun gear 12 transmits the power to the first motor 20 to charge the battery 80, and the inner ring 11 transmits the power to the transmission gear 15 through the first coupling 40, the transmission gear 15 transmits the power to the first differential 60, and the first differential 60 transmits the power to the first axle 90 to drive the first axle 90 to move to realize vehicle driving, realizing power split of the engine 30, realizing driving and generating electricity at the same time to realize the 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 to increase the output power.

[0041] When the brake energy recovery mode is performed, the first coupling 40 disconnects the inner ring 11 from the transmission gear 15, at this time, the inner ring 11 is disconnected from the transmission gear 15, the second coupling 50 disconnects the inner ring 11 from the transmission housing, and the power of the engine 30 cannot be transmitted to the differential, when the vehicle is in braking and coasting conditions, the kinetic energy of the wheels is transmitted to the first differential 60 through the first axle 90, the first differential 60 transmits the power to the second motor 70, the second motor 70 reverses the torque to charge the battery 80, and the brake energy recovery mode is realized.

[0042] The application utilizes a planetary gear mechanism, a first coupling 40 and a second coupling 50 to realize EV driving, series mode, starting engine 30, ECVT mode and braking energy recovery mode, and only needs to disconnect or connect the first coupling 40 and the second coupling 50 to realize the switching of the driving mode, and the mode switching is simple. Moreover, there is no shift hub, shift motor and the like, so that the overall structure of the hybrid power driving system is more compact, the system is simplified, the cost is reduced, the axial dimension of the hybrid power driving system is shortened, and the arrangement is facilitated.

[0043] A hybrid power driving system working state table, wherein 0 represents disconnection and 1 represents connection.

[0044]

[0045]

[0046] In some embodiments, the first coupling 40 can be a one-way clutch, an electromagnetic clutch or the like with one-way or 0-1 two-position locking function. The second coupling 50 can be a clutch, a synchronizer, a two-position electromagnetic clutch, a brake or the like with 0-1 two-position power coupling device.

[0047] Connection Figure 1 In some embodiments, in order to realize 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 are drivingly connected with the transmission gear 15 through a first reduction gear mechanism 100.

[0048] 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 axle 90 through the first differential 60.

[0049] Connection Figure 1 In some embodiments, in order to realize 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 engaged with the transmission gear 15, and the other end is provided with a first main reduction driving gear 103 engaged with the first main reduction driven gear 61. Wherein, the first intermediate shaft 101 is arranged in parallel with the first axle 90, and the hybrid power driving system further includes a first connecting shaft 71 connected with the second motor 70, the first connecting shaft 71 is provided with a first gear 72 engaged with the first intermediate shaft gear 102, and the first connecting shaft 71 is arranged in parallel with the first intermediate shaft 101.

[0050] When the engine 30 or the second motor 70 transmits power to the first differential 60, the transmission gear 15 can transmit power to the first intermediate shaft 101 through the first intermediate shaft gear 102, the second motor 70 can transmit power to the first intermediate shaft 101 through the first connecting shaft 71, the first gear 72 and the first intermediate shaft gear 102, the first intermediate shaft 101 drives the first main reduction driving gear 103 to rotate, the first main reduction driving gear 103 drives the first main reduction driven gear 61 to rotate, and the first main reduction driven gear 61 transmits power to the first axle 90 through the first differential 60 to drive the vehicle to travel.

[0051] When the brake energy recovery mode is performed, the first axle 90 drives the second motor 70 to act 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 first connecting shaft 71, and the second motor 70 charges the electromagnet 80.

[0052] In combination Figure 1 In some embodiments, the first coupling 40 and the second coupling 50 are arranged side by side in the axial direction of the first axle 90, so as to facilitate the integrated design of the second clutch 50 and the third clutch 60, so as to achieve higher integration and smaller axial size, so as to further reduce the axial size of the hybrid power driving system.

[0053] In combination Figure 1 In some embodiments, in order to realize power transmission, the hybrid power driving system further comprises a second connecting shaft 110 and a third connecting shaft 120. One end of the second connecting shaft 110 is connected with the crankshaft 31 of the engine 30, and the other end is connected with the planetary carrier 14. One end of the third connecting shaft 120 is connected with the first motor 20, and the other end is connected with the sun gear 12. The second connecting shaft 110 is coaxially arranged with the third connecting shaft 120, and the second connecting shaft 110 is arranged in parallel with the first axle 90.

[0054] The power of the engine 30 can be transmitted to the second connecting shaft 110 through the crankshaft 31, and the second connecting shaft 110 can transmit the power to the planetary carrier 14. The power of the first motor 20 can be transmitted to the sun gear 12 through the third connecting shaft 120, and of course, the sun gear 12 can transmit the power to the first motor 20 through the third connecting shaft 120.

[0055] The crankshaft 31 of the engine 30 produces periodic torsional vibration under the action of combustion explosion and reciprocating inertia force, which will cause gear meshing impact, transmission belt flutter or motor rotor resonance if directly transmitted to the second connecting shaft 110. In combination Figure 1In some embodiments, in order to improve the NVH (Noise, Vibration and Harshness) performance, the second connecting shaft 110 is connected with the crankshaft 31 through the torsional damper 130, the torsional damper 130 absorbs vibration energy through elastic elements (such as rubber, spring) and damping elements (such as silicone oil), attenuates the torsional vibration amplitude to the allowable range, improves the NVH, at the same time, through the elastic buffering and damping attenuation, makes the torque transmission more smooth, reduces the impact and jerk.

[0056] Figure 2 The second structure diagram of the hybrid drive system of some embodiments. In combination with the first structure diagram of the hybrid drive system of some embodiments Figure 2 In some embodiments, in order to realize various driving modes of the hybrid drive system, the hybrid drive system further comprises a third motor 140 and a second differential 150. The third motor 140 is electrically connected with the battery 80. The second differential 150 is drivingly connected with the third motor 140 and connected with a second wheel shaft 160. The second wheel shaft 160 is arranged in parallel with the first wheel shaft 90.

[0057] In the first four-wheel drive mode, the first coupling 40 disconnects the inner ring gear 11 from the transmission gear 15, at this time, the inner ring gear 11 is disconnected from the transmission gear 15 without connection, the second coupling 50 disconnects the inner ring gear 11 from the transmission housing, the battery 80 supplies power to the second motor 70 and the third motor 140, starts the second motor 70 and the third motor 140, the second motor 70 transmits power to the first differential 60, the first differential 60 transmits power to the first wheel shaft 90 to drive the first wheel shaft 90 to move, the third motor 140 transmits power to the second differential 150, the second differential 150 transmits power to the second wheel shaft 160, to realize the first four-wheel drive mode.

[0058] In the second four-wheel drive mode, the first coupling 40 connects the inner ring 11 and the transmission gear 15, at this time, the inner ring 11 is connected with the transmission gear 15, the second coupling 50 disconnects the inner ring 11 and the transmission case, the engine 30 is started, the power of the engine 30 is transmitted to the planet carrier through the planet carrier, the planet carrier 13 transmits the power to the sun gear 12 and the inner ring 11 respectively, the sun gear 12 transmits the power to the first motor 20, so that the first motor 20 charges the battery 80, the inner ring 11 transmits the power to the transmission gear 15 through the first coupling 40, 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, to realize the vehicle driving, realizing the power split of the engine 30, realizing the engine 30 driving while driving. The battery 80 supplies power to the third motor 140, starts the third motor 140, the third motor 140 transmits the power to the second differential 150, the second differential 150 transmits the power to the second axle 160, to realize the second four-wheel drive 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 to increase the output power.

[0059] In the EV front drive, the first coupling 40 disconnects the inner ring 11 and the transmission gear 15, at this time, the inner ring 11 is disconnected from the transmission gear 15 without connection, the second coupling 50 disconnects the inner ring 11 and the transmission case, the engine 30, the first motor 20 and the third motor 140 are all closed, the second motor 70 is started, the power of the second motor 70 is transmitted to the first differential 60 to drive the first axle 90 to move to realize the EV front drive.

[0060] In the EV front drive braking energy recovery, the first coupling 40 disconnects the inner ring 11 and the transmission gear 15, at this time, the inner ring 11 is disconnected from the transmission gear 15 without connection, the second coupling 50 disconnects the inner ring 11 and the transmission case, the engine 30, the first motor 20 and the third motor 140 are all closed, the second motor 70 is started, when the vehicle is in braking, sliding condition, the kinetic energy of the wheel is transmitted to the first differential 60 through the first axle 90, the first differential 60 transmits to the second motor 70, the second motor 70 reverses the torque to charge the battery 80, to realize the EV front drive braking energy recovery mode.

[0061] When in EV rear-wheel drive mode, the first coupler 40 disconnects the internal gear ring 11 from the transmission gear 15. At this time, the internal gear ring 11 is disconnected from the transmission gear 15 and there is no connection. The second coupler 50 disconnects the internal gear ring 11 from the gearbox housing. The engine 30, the first motor 20, and the second motor 70 are all turned off. The battery 80 supplies power to the third motor 140, starting the third motor 140. The third motor 140 transmits power to the second differential 150, and the second differential 150 transmits power to the second wheel axle 160 to achieve EV rear-wheel drive.

[0062] During EV rear-wheel drive regenerative braking, the first coupler 40 disconnects the internal gear ring 11 from the transmission gear 15. At this time, the internal gear ring 11 is disconnected from the transmission gear 15. The second coupler 50 disconnects the internal gear ring 11 from the gearbox housing. The engine 30, the first motor 20, and the second motor 70 are all turned off. When the vehicle is in braking or coasting conditions, the kinetic energy of the wheels is transmitted to the second differential 150 through the second wheel axle 160. The second differential 150 is then transmitted to the third motor 140. The third motor 140 reverses the torque to charge the battery 80, thus realizing the EV rear-wheel drive regenerative braking mode.

[0063] When performing series drive, the third motor 140 can be started or stopped.

[0064] When starting the engine, you can choose to start or stop the third motor 140.

[0065] When in ECVT mode, turn off the third motor 140.

[0066] A hybrid drive system operating state table, wherein 0 indicates disconnection, 1 indicates engagement, off indicates shutdown, and on indicates startup.

[0067]

[0068]

[0069] Combination Figure 2 In some embodiments, in order to achieve power transmission, the second differential 150 is provided with a second main reduction driven gear 151, and the second main reduction driven gear 151 is connected to the third motor 140 through a second reduction gear mechanism 170.

[0070] When the third motor 140 transmits power to the second differential 150, the power of the third motor 140 can be transmitted to the second main reduction driven gear 151 through the second reduction gear mechanism 170, and the second main reduction driven gear 151 transmits power to the second wheel axle 160 through the second differential 150.

[0071] Combination Figure 2In some embodiments, to achieve power transmission, the second reduction gear mechanism 170 includes a second intermediate shaft 171. One end of the second intermediate shaft 171 is provided with a second intermediate shaft gear 172, and the other end is provided with a second main reduction drive gear 173 that meshes with the second main reduction driven gear 151. The second intermediate shaft 171 is arranged parallel to the second wheel axle 160. The hybrid drive system also includes a fourth connecting shaft 180 connected to the third motor 140. The fourth connecting shaft 180 is provided with a second gear 181 that meshes with the second intermediate shaft gear 172, and the fourth connecting shaft 180 is arranged parallel to the second intermediate shaft 171.

[0072] When the third motor 140 transmits power to the second differential 150, the third motor 140 can transmit power to the second intermediate shaft 171 through the fourth connecting shaft 180, the second gear 181, and the second intermediate shaft gear 172. The second intermediate shaft 171 drives the second main reducer drive gear 173 to rotate, and the second main reducer drive gear 173 drives the second main reducer driven gear 151 to rotate. The second main reducer driven gear 151 transmits power to the second wheel axle 160 through the second differential 150 to drive the vehicle.

[0073] Of course, when performing EV rear-wheel drive braking energy recovery, the second wheel axle 160 drives the third motor 140 through the second differential 150, the second main reducer driven gear 151, the second main reducer drive gear 173, the second intermediate shaft 171, the second intermediate shaft gear 172, the second gear 181 and the fourth connecting shaft 180, so that the third motor 140 can charge the battery 80.

[0074] Based on the same inventive concept, this application also proposes a vehicle that adopts the aforementioned hybrid drive system. The specific structure of the hybrid drive system is as described in the above embodiments. Since it adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0075] In the description of this application, 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", etc., 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 application and simplifying the description, and do not 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 application.

[0076] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0078] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0079] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A hybrid power drive system, characterized in that, include: A planetary gear mechanism includes an internal gear ring, a sun gear located at the center of the internal gear ring, a plurality of planet gears meshing between the internal gear ring and the sun gear, and a planet carrier rotatably connecting the plurality of planet gears; A first motor is connected to the sun gear; The engine is connected to the planetary gear carrier; A first coupler is connected to the internal gear ring and the transmission gear to engage or disengage the internal gear ring with the transmission gear; A second coupler is connected to the internal gear ring and the gearbox housing to allow the internal gear ring to engage or disengage with the gearbox housing. The first differential is connected to the transmission gear and to the first wheel axle; The second motor is connected to the first differential drive. The 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 first differential is provided with a first main reduction driven gear, and the first main reduction driven gear and the second motor are connected to the transmission gear through a first reduction gear mechanism.

3. The hybrid drive system according to claim 2, characterized in that, The first reduction gear mechanism includes: The first intermediate shaft has a first intermediate shaft gear at one end that meshes with the transmission gear, and a first main reduction driving gear at the other end that meshes with the first main reduction driven gear. The first intermediate shaft is arranged parallel to the first wheel axle. The hybrid drive system also includes a first connecting shaft connected to the second motor. The first connecting shaft is provided with a first gear that meshes with the gear of the first intermediate shaft. The first connecting shaft is arranged parallel to the first intermediate shaft.

4. The hybrid drive system according to any one of claims 1-3, characterized in that, Along the axial direction of the first wheel axle, the first coupler and the second coupler are arranged side by side at intervals.

5. The hybrid drive system according to any one of claims 1-3, characterized in that, The hybrid drive system also includes: The second connecting shaft is connected at one end to the crankshaft of the engine and at the other end to the planetary gear carrier; The third connecting shaft is connected at one end to the first motor and at the other end to the sun gear; The second connecting shaft is coaxial with the third connecting shaft, and the second connecting shaft is parallel to the first wheel axle.

6. The hybrid drive system according to claim 5, characterized in that, The second connecting shaft is connected to the crankshaft via a torsional damper.

7. The hybrid drive system according to any one of claims 1-3, characterized in that, The hybrid drive system also includes: The third motor is electrically connected to the battery; The second differential is connected to the third motor and to the second wheel axle; 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 gear, and the second main reduction gear is connected to the third motor through a second reduction gear mechanism.

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

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

Images