CN111114277A

CN111114277A - Hybrid power driving system and vehicle

Info

Publication number: CN111114277A
Application number: CN201811284770.8A
Authority: CN
Inventors: 陆国祥; 朱新明; 陈历焘; 汤杰聪
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-05-08
Anticipated expiration: 2038-10-31
Also published as: CN111114277B

Abstract

The invention discloses a hybrid power driving system and a vehicle, which comprise an engine, wherein the engine is respectively connected with a first input shaft, a second input shaft and a third input shaft through a first clutch, a second clutch and a third clutch; the first input shaft and the second input shaft are respectively connected to the output shaft through a first gear set and a second gear set, and the first motor and the second motor are respectively connected with the third input shaft and the output shaft; the first input shaft and the second input shaft are respectively connected to the output shaft through a third gear set and a fourth gear set, the first synchronizer can cut off the effective connection of at least one group of the first gear set and the third gear set to the first input shaft and the output shaft, the second synchronizer can cut off the effective connection of one group of the second gear set and the fourth gear set to the second input shaft and the output shaft, or the third input shaft is connected to the output shaft through the third gear set and the fourth gear set, and the third synchronizer can cut off the effective connection of one group of the third gear set and the fourth gear set to the third input shaft and the output shaft; the first gear set, the second gear set, the third gear set and the fourth gear set correspond to four speed ratios; the four-gear speed change mechanism has a simple structure, can realize four-gear speed change of the engine, and improves the vehicle economy.

Description

Hybrid power driving system and vehicle

Technical Field

The invention belongs to the technical field of power, and particularly relates to a hybrid power driving system and a vehicle.

Background

Hybrid powertrain systems may improve vehicle economy in a number of ways. For example, the engine may be turned off during idle, deceleration, or braking, and travel in an electric-only drive mode to eliminate efficiency losses due to engine drag. Additionally, energy stored in the power battery, generated by regenerative braking or generated by the electric machine during engine operation, may be utilized in an electric-only drive mode, or to supplement the torque or power of the engine in a hybrid drive mode.

Hybrid vehicles are capable of being driven by combining at least two different powers, and most of the hybrid vehicles currently employ a gasoline-electric hybrid system including an engine powered from fuel and an electric motor driven by electric power. In order to improve the combustion efficiency of the engine to the maximum extent, hybrid power systems developed by many automobile manufacturers all adopt a dual-motor structure, namely, a generator is added besides a driving motor. Because the engine, the generator and the driving motor exist at the same time, the connection and control among the engine, the generator and the driving motor directly influence the performance of the hybrid vehicle.

The prior hybrid power driving system comprises an engine, a power motor and an auxiliary motor, the engine outputs power to wheels of the hybrid electric vehicle through the double clutches, the second input shaft is coaxially sleeved on the first input shaft, the engine is arranged to be selectively connected with one of the first input shaft and the second input shaft through the double clutches, a gear driving gear is arranged on each of the first input shaft and the second input shaft, the first output shaft and the second output shaft are arranged in parallel with the first input shaft, a gear driven gear is arranged on each of the first output shaft and the second output shaft, the gear driven gears are correspondingly meshed with the gear driving gears, the power motor is arranged to be linked with the first input shaft or the second input shaft, and the auxiliary motor is connected with the engine and generates power under the driving of the engine to charge the power battery; although two motors are arranged, the power motor is only used for driving and not used for generating electricity, the charging efficiency is low, the auxiliary motor needs an additional connecting structure to be separately connected with the engine, the structure is complex, the load is relatively high, and the hybrid power driving system cannot be effectively kept to work in an efficient range.

In addition, the existing hybrid power system is difficult to solve the efficiency problem of low-speed and medium-low-speed engines, the electric balance problem and the high-speed dynamic problem of the engines at the same time. The engine is difficult to work in a fuel economy area, and the vehicle economy is poor.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the problem of poor vehicle economy in the existing scheme, a hybrid power driving system and a vehicle are provided.

In order to solve the above technical problem, in one aspect, an embodiment of the present invention provides a hybrid drive system, including an engine, a first motor, a second motor, a first clutch, a second clutch, a third clutch, a first input shaft, a second input shaft, a third input shaft, an output shaft, a first gear set, a second gear set, a third gear set, and a fourth gear set, where the first gear set, the second gear set, the third gear set, and the fourth gear set correspond to four speed ratios;

the engine is connected with the first input shaft, the second input shaft and the third input shaft through the first clutch, the second clutch and the third clutch respectively;

the first input shaft and the second input shaft are respectively connected with the output shaft in a speed reduction way through the first gear set and the second gear set;

the first motor and the second motor are respectively connected with the third input shaft and the output shaft;

the hybrid power driving system further comprises a first synchronizer and a second synchronizer, and the first input shaft and the second input shaft are further connected to the output shaft in a speed reduction mode through the third gear set and the fourth gear set respectively; the first synchronizer operatively connects one of the first and third gear sets between the first input shaft and the output shaft or simultaneously disconnects the first gear set from the first input shaft and the output shaft and the third gear set from the first input shaft and the output shaft; the second synchronizer operatively connects one of the second gear set and the fourth gear set between the second input shaft and the output shaft, or simultaneously disconnects the second gear set from the second input shaft and the output shaft and disconnects the fourth gear set from the second input shaft and the output shaft; or

The hybrid power driving system further comprises a third synchronizer, and the third input shaft is connected with the output shaft in a speed reduction mode through the third gear set and the fourth gear set; the third synchronizer operatively connects one of the third and fourth gear sets between the third input shaft and the output shaft, or disconnects the third gear set from the third input shaft and the output shaft and disconnects the fourth gear set from the third input shaft and the output shaft simultaneously.

In another aspect, an embodiment of the present invention further provides a vehicle, which includes the hybrid drive system.

According to the hybrid power driving system and the vehicle provided by the embodiment of the invention, the power of the engine can be selectively transmitted to the output shaft through one gear set of the first gear set, the second gear set, the third gear set and the fourth gear set by controlling the connection or disconnection of the first clutch, the second clutch and the third clutch when the third synchronizer is arranged and controlling the connection or disconnection of the first clutch, the second clutch and the third synchronizer when the first synchronizer and the second synchronizer are arranged, so that the engine can output four speed ratios, and the four-gear speed change of the engine is realized; the first motor can be used for generating or driving, the first motor can output two speed ratios when a third synchronizer is arranged, the second motor can be used for generating or driving, a pure electric driving mode, a series connection driving mode, a parallel connection driving mode and an engine direct driving mode can be realized, multiple driving modes are provided with multiple gears, different driving force requirements of the engine can be met, the engine can work in a region with higher fuel economy as far as possible, the first motor and the second motor work in a region with higher economy, the problems of low-speed and medium-speed engine efficiency and electric balance and the problem of high-speed engine dynamic are solved, and the working efficiency of the system is high, so that the vehicle economy is improved; the hybrid power driving system is simple and compact in structure, the number of used parts is small, the structural complexity of the hybrid power driving system is reduced, energy transmission loss is small, and system efficiency is improved.

Drawings

FIG. 1 is a schematic illustration of a first hybrid drive system according to a first embodiment of the present invention;

FIG. 2 is a schematic block diagram of a hybrid drive system according to a first embodiment of the present invention;

FIG. 3 is a schematic illustration of a hybrid drive system according to a second embodiment of the present invention;

FIG. 4 is a schematic illustration of a second exemplary hybrid drive system according to the present invention;

FIG. 5 is a schematic illustration of a hybrid drive system according to a third embodiment of the present invention;

FIG. 6 is a schematic illustration of a hybrid drive system according to a third embodiment of the present invention;

FIG. 7 is a schematic illustration of a hybrid drive system according to a fourth embodiment of the present invention;

FIG. 8 is a schematic illustration of a hybrid drive system according to a fourth embodiment of the present invention;

FIG. 9 is a first power transmission route diagram of the hybrid drive system of FIG. 3 in a first electric-only drive mode;

FIG. 10 is a second power transmission route diagram of the hybrid drive system illustrated in FIG. 3 during the first electric-only drive mode;

FIG. 11 is a power transmission route diagram of the hybrid drive system of FIG. 3 in a second electric-only drive mode;

FIG. 12 is a first power transmission route diagram of the hybrid drive system of FIG. 3 in a third electric-only drive mode;

FIG. 13 is a second power transmission route diagram of the hybrid drive system illustrated in FIG. 3 in a third electric-only drive mode;

FIG. 14 is a power transmission scheme of the hybrid drive system of FIG. 3 in a series drive mode;

FIG. 15 is a power transmission route diagram of the hybrid drive system illustrated in FIG. 3 in a first parallel drive mode;

FIG. 16 is a power transmission route diagram of the hybrid drive system illustrated in FIG. 3 in a second parallel drive mode;

FIG. 17 is a first power transmission route diagram of the hybrid drive system of FIG. 3 in a third parallel drive mode;

FIG. 18 is a second power transmission route diagram of the hybrid drive system illustrated in FIG. 3 in a third parallel drive mode;

FIG. 19 is a power transmission route diagram of the hybrid drive system illustrated in FIG. 3 in the first engine direct drive mode;

FIG. 20 is a power transmission route diagram of the hybrid drive system illustrated in FIG. 3 in the second engine direct drive mode;

FIG. 21 is a first power transmission route map of the hybrid drive system of FIG. 3 in a third engine direct drive mode;

FIG. 22 is a second power transmission route pattern for the hybrid drive system illustrated in FIG. 3 in the third engine direct drive mode;

FIG. 23 is a power transmission route diagram of the hybrid drive system illustrated in FIG. 3 in a fourth engine direct drive mode;

FIG. 24 is a power transmission route diagram of the hybrid drive system shown in FIG. 3 in a fifth engine direct drive mode;

FIG. 25 is a first power transmission route map of the hybrid drive system of FIG. 3 in a sixth engine direct drive mode;

FIG. 26 is a second power transmission route pattern of the hybrid drive system illustrated in FIG. 3 in a sixth engine direct drive mode;

fig. 27 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.

The reference numerals in the specification are as follows:

1. an engine; 2. a first motor; 3. a second motor; 4. a first clutch; 5. a second clutch; 6. a third clutch; 7. a fourth clutch; 8. a fifth clutch; 9. a first synchronizer; 10. a second synchronizer; 11. a third synchronizer; 12. a first input shaft; 13. a second input shaft; 14. a third input shaft;

15. a first parallel axis gear set; 151. a fifth driving gear; 152. a fifth driven gear;

16. a first planetary gear mechanism;

17. a second parallel shaft gear set; 171. a sixth driving gear; 182. a sixth driven gear;

18. a second planetary gear mechanism; 19. an output shaft;

20. a first gear set; 201. a first drive gear; 202. a first driven gear;

21. a second gear set; 211. a second driving gear; 212. a second driven gear;

22. a third gear set; 221. a third driving gear; 222. a third driven gear;

23. a fourth gear set; 231. a fourth driving gear; 232. a fourth driven gear;

24. a main reducer; 25. a differential mechanism; 26. a wheel;

100. a vehicle; 200. a hybrid drive system.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

First embodiment

Referring to fig. 1 to 4, a hybrid drive system according to a first embodiment of the present invention includes an engine 1, a first motor 2, a second motor 3, a first clutch 4, a second clutch 5, a third clutch 6, a first input shaft 12, a second input shaft 13, a third input shaft 14, an output shaft 19, a first gear set 20, a second gear set 21, a third gear set 22, and a fourth gear set 23, where the first gear set 20, the second gear set 21, the third gear set 22, and the fourth gear set 23 correspond to four speed ratios;

the engine 1 is connected with a first input shaft 12, a second input shaft 13 and a third input shaft 14 through a first clutch 4, a second clutch 5 and a third clutch 6 respectively;

the first input shaft 12 and the second input shaft 13 are respectively connected with the output shaft 19 in a speed reduction way through a first gear set 20 and a second gear set 21;

the first and second

electric machines

2, 3 are connected to the third input shaft 14 and the output shaft 19, respectively.

The hybrid drive system further comprises a third synchronizer 11, a third input shaft 14 is connected with the output shaft 19 in a speed reduction mode through a third gear set 22 and a fourth gear set 23; the third synchronizer 11 operatively connects one of the third gear set 22 and the fourth gear set 23 between the third input shaft 14 and the output shaft 19 or disconnects the third gear set 22 from the third input shaft 14 and the output shaft 19 and disconnects the fourth gear set 23 from the third input shaft 14 and the output shaft 19.

In the present application, the effective connection means a connection that enables power transmission.

In the application, the speed reduction connection refers to a connection mode for reducing the rotating speed; if the first input shaft 12 is connected to the output shaft 19 through the first gear set 20 in a speed reducing manner, it means that when power is transmitted from the first input shaft 12 to the output shaft 19, the power is transmitted through the first gear set 20, so that the rotating speed of the output shaft 19 is lower than that of the first input shaft 12, and specifically, the power of the first input shaft 12 passes through the pinion gear and the bull gear of the first gear set 20 in sequence and then is transmitted to the output shaft 19.

By controlling the engagement or disengagement of the first clutch 4, the second clutch 5 and the third clutch 6 and the engagement or disengagement of the third synchronizer 11, the power of the engine 1 can be selectively transmitted to the output shaft 19 through one of the first gear set 20, the second gear set 21, the third gear set 22 and the fourth gear set 23, so that the engine 1 can output four speed ratios, and the four-gear speed change of the engine 1 is realized; the first motor 2 can be used for power generation or driving, the first motor 2 can output two speed ratios by switching the third synchronizer 11, two-gear speed change of the first motor 2 is realized, the second motor 3 can be used for power generation or driving, a pure electric driving mode, a series driving mode, a parallel driving mode and an engine direct driving mode can be realized, and multiple driving modes have multiple gears, so that different driving force requirements of the engine 1 can be met, the engine 1 can work in an interval with higher fuel economy as much as possible, the first motor 2 and the second motor 3 work in an interval with higher economy, the efficiency problem and the electric balance problem of the engine 1 at low speed and medium speed and the dynamic problem of the engine 1 at high speed are solved, the working efficiency of the system is high, and the vehicle economy is improved; the hybrid power driving system is simple and compact in structure, the number of used parts is small, the structural complexity of the hybrid power driving system is reduced, energy transmission loss is small, and system efficiency is improved.

Referring to fig. 1 to 4, the hybrid drive system further includes a final drive 24 and a differential 25, the final drive 24 is connected to the output end of the output shaft 19, and the differential 25 is connected between the final drive 24 and the wheels 26, so as to transmit the power of the output shaft 19 to the wheels 26 through the final drive 24 and the differential 25, and drive the vehicle to run. Of course, an output member for transmitting power may be provided between the output shaft 19 and the final drive 24.

Preferably, the third synchronizer 11 is disposed on the third input shaft 14 (see fig. 2) or the output shaft 19 (see fig. 1), the structure is simple and compact, and the disposition of the third synchronizer 11 on the output shaft 19 is more beneficial to reducing the system load.

Preferably, the third input shaft 14 is connected with the first electric machine 2 in a speed-increasing manner through a first parallel shaft gear set or a first planetary gear mechanism, which is beneficial to improving the efficiency of the engine 1 driving the first electric machine 2 to generate electricity. The structure of the third input shaft 14 connected to the first electric machine 2 via the first parallel shaft gear set or the first planetary gear set in an increasing speed manner in the first embodiment is the same as that in the second embodiment, and reference can be made to fig. 5 to 8, and a separate drawing is omitted here. The speed-increasing connection in the present application refers to a connection mode in which the rotation speed is increased.

Specifically, the first parallel shaft gear set may include a fifth driving gear provided on the third input shaft 14 and a fifth driven gear provided on the crankshaft of the first motor 2.

Preferably, the second electric machine 3 is connected with the output shaft 19 in a speed reduction manner through a second parallel shaft gear set or a second planetary gear mechanism.

Specifically, the second parallel shaft gear set 17 may include a sixth driving gear provided on the crankshaft of the second motor 3 and a sixth driven gear provided on the output shaft 19.

The structure of the first embodiment in which the second electric motor 3 is connected to the output shaft 19 via a second parallel shaft gear set or a second planetary gear mechanism in a speed reduction manner is the same as that of the fifth embodiment, and reference is made to fig. 7 and 8, which are not separately shown.

Preferably, referring to fig. 1, the first gear set 20 includes a first driving gear 201 disposed on the first input shaft 12 and a first driven gear 202 disposed on the output shaft 19, the first driving gear 201 is engaged with the first driven gear 202;

the second gear set 21 comprises a second driving gear 211 arranged on the second input shaft 13 and a second driven gear 212 arranged on the output shaft 19, and the second driving gear 211 is meshed with the second driven gear 212;

the third gear set 22 comprises a third driving gear 221 and a third driven gear 222 arranged on the output shaft 19, wherein the third driving gear 221 is meshed with the third driven gear 222;

the fourth gear set 23 includes a fourth driving gear 231 and a fourth driven gear 232 disposed on the output shaft 19, and the fourth driving gear 231 is engaged with the fourth driven gear 232;

the third driving gear 221 and the fourth driving gear 231 are both arranged on the third input shaft 14; the power output path is simplified, the structure is simpler and more compact, and the reduction of energy transmission loss and the miniaturization of a hybrid power driving system are facilitated.

More preferably, the third driving gear 221 and the fourth driving gear 231 are both rotatably disposed on the third input shaft 14, and the third synchronizer 11 is disposed on the third input shaft 14 and can be selectively connected to the third driving gear 221 or the fourth driving gear 231 (see fig. 2); or the third driven gear 222 and the fourth driven gear 232 are both rotatably arranged on the output shaft 19, and the third synchronizer 11 is arranged on the output shaft 19 and can be selectively connected with the third driven gear 222 or the fourth driven gear 232 (refer to fig. 1).

Preferably, referring to fig. 1, the first clutch 4, the second clutch 5 and the third clutch 6 are integrated three clutches, the first input shaft 12 and the second input shaft 13 are hollow shafts, the first input shaft 12 is rotatably disposed in a shaft hole of the second input shaft 13, and the third input shaft 14 is rotatably disposed in a shaft hole of the first input shaft 12; the structure is simple and compact, the miniaturization of a hybrid power driving system is facilitated, and the energy transmission loss is reduced as much as possible.

More preferably, the first clutch 4, the second clutch 5 and the third clutch 6 are coaxially and fixedly arranged; the third clutch 6 is embedded in the first clutch 4 and the second clutch 5 (see fig. 1), or the first clutch 4 and the third clutch 6 are embedded in the second clutch 5 (not shown). The integration of the first clutch 4, the second clutch 5 and the third clutch 6 is realized, the third clutch 6 corresponding to the third input shaft 14 positioned at the center in the input shaft is arranged at the inner layer of the integrated three-clutch, the second clutch 5 corresponding to the second input shaft 13 positioned at the outermost layer in the input shaft is arranged at the outer layer in the integrated three-clutch, and the first clutch 4 corresponding to the first input shaft 12 positioned in the middle in the input shaft is arranged at the inner layer or the outer layer in the integrated three-clutch.

More preferably, the driven part of the first clutch 4 is closer to the axis of the first electric machine 2 than the driving part, the driven part of the second clutch 5 is closer to the axis of the first electric machine 2 than the driving part, and the driven part of the second clutch 5 is closer to the axis of the first electric machine 2 than the driving part, which is advantageous to reduce the size of the first input shaft 12, the second input shaft 13, and the third input shaft 14, thereby reducing the load.

The first embodiment provides a hybrid drive system having a plurality of drive modes: the hybrid vehicle is characterized by comprising 3 pure electric drive modes (a first pure electric drive mode, a second pure electric drive mode and a third pure electric drive mode), a series drive mode, 3 parallel drive modes (a first parallel drive mode, a second parallel drive mode and a third parallel drive mode), and 6 engine direct drive modes (a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, a fourth engine direct drive mode, a fifth engine direct drive mode and a sixth engine direct drive mode). The operation logic in each driving mode is shown in table 1; the third and fourth gear sets 22 and 23 are also identified in table 1 as GS3 and GS4, respectively.

Table 1 table of operation logic in each driving mode (first embodiment)

Hereinafter, the power transmission route in each drive mode will be described in detail with reference to fig. 1 and 2.

Referring to fig. 1, when the third synchronizer 11 is disposed on the output shaft 19, the power path from the third input shaft 14 to the output shaft 19 is: the third input shaft 14- > the third gear set 22 or the fourth gear set 23- > the third synchronizer 11- > the output shaft 19;

referring to fig. 2, when the third synchronizer 11 is disposed on the third input shaft 14, the power path from the third input shaft 14 to the output shaft 19 is: the third input shaft 14- > the third synchronizer 11- > the third gear set 22 or the fourth gear set 23- > the output shaft 19;

in order to simplify the description of the power transmission route in each mode described below, the synchronizer is omitted in the description of the power transmission route.

(1) First pure electric drive mode

Disconnecting the first clutch 4, the second clutch 5 and the third clutch 6, enabling the third synchronizer 11 to effectively connect one of the third gear set 22 and the fourth gear set 23 between the third input shaft 14 and the output shaft 19, enabling the engine 1 to be out of work, the first motor 2 to drive and the second motor 3 to be out of work, and establishing a first pure electric driving mode;

the power transmission route in the driving mode is as follows: the first motor 2- > the third input shaft 14- > the third gear set 22 or the fourth gear set 23- > the output shaft 19;

the power transmission path in this drive mode is similar to that of fig. 9-10 and this scheme is not separately illustrated.

In a first electric-only drive mode: the hybrid power drive system drives the wheels 26 by using the first motor 2, and simultaneously the engine 1 and the second motor 3 do not work, and the two-gear speed ratio output of the first motor 2 is realized by switching the third synchronizer 11.

(2) Second pure electric drive mode

The first clutch 4, the second clutch 5 and the third clutch 6 are disconnected, the third synchronizer 11 simultaneously disconnects the third gear set 22 from the third input shaft 14 and the output shaft 19 and disconnects the fourth gear set 23 from the third input shaft 14 and the output shaft 19, the engine 1 does not work, the first motor 2 does not work, and the second motor 3 drives to establish a second pure electric driving mode;

the power transmission route in the driving mode is as follows: the output shaft 19 of the second motor 3-;

the power transmission path in this drive mode is similar to that of fig. 11, and this scheme is not separately illustrated.

In a second pure electric drive mode: the hybrid power driving system drives the wheels 26 by using the second motor 3, and simultaneously the engine 1 and the first motor 2 do not work, so that the single-gear speed ratio output of the second motor 3 is realized.

(3) Third pure electric drive mode

Disconnecting the first clutch 4, the second clutch 5 and the third clutch 6, enabling the third synchronizer 11 to effectively connect one of the third gear set 22 and the fourth gear set 23 between the third input shaft 14 and the output shaft 19, enabling the engine 1 to be out of operation, the first motor 2 to be driven, and the second motor 3 to be driven, so as to establish a third pure electric driving mode;

the power transmission path in this drive mode is similar to that of fig. 12-13, and this scheme is not separately illustrated.

In a third pure electric drive mode: the hybrid power driving system utilizes the first motor 2 to drive and the second motor 3 to drive the wheels 26 together, meanwhile, the engine 1 does not work, the two-gear speed ratio output of the first motor 2 is realized by switching the third synchronizer 11, and the second motor 3 outputs at the single-gear speed ratio.

(4) Series drive mode

The first clutch 4 and the second clutch 5 are disconnected, the third clutch 6 is engaged, the third synchronizer 11 simultaneously disconnects the third gear set 22 from the third input shaft 14 and the output shaft 19 and disconnects the fourth gear set 23 from the third input shaft 14 and the output shaft 19, the engine 1 is driven, the first motor 2 generates electricity, and the second motor 3 is driven to establish a series driving mode;

the power transmission route 1 in this drive mode is: the engine 1- > the third clutch 6- > the third input shaft 14- > the first electric machine 2;

the power transmission route 2 is: the output shaft 19 of the second motor 3-;

the power transmission path in this drive mode is similar to that of fig. 14, and this scheme is not separately illustrated.

In the series drive mode, the hybrid drive system drives the wheels 26 with the second electric machine 3, while the engine 1 drives the first electric machine 2 to generate electricity.

(5) First parallel driving mode

The first clutch 4 is engaged, the second clutch 5 and the third clutch 6 are disconnected, the third synchronizer 11 simultaneously disconnects the third gear set 22 from the third input shaft 14 and the output shaft 19 and disconnects the fourth gear set 23 from the third input shaft 14 and the output shaft 19, the engine 1 is driven, the first motor 2 does not work, and the second motor 3 is driven to establish a first parallel driving mode;

the power transmission route 1 in this drive mode is: the engine 1- > the first clutch 4- > the first input shaft 12- > the first gear set 20- > the output shaft 19;

the power transmission route 2 is: the output shaft 19 of the second motor 3-;

the power transmission path in this drive mode is similar to that of fig. 15, and this scheme is not separately illustrated.

(6) Second parallel drive mode

The second clutch 5 is engaged, the first clutch 4 and the third clutch 6 are disconnected, the third synchronizer 11 simultaneously disconnects the third gear set 22 from the third input shaft 14 and the output shaft 19 and disconnects the fourth gear set 23 from the third input shaft 14 and the output shaft 19, the engine 1 is driven, the first motor 2 does not work, and the second motor 3 is driven to establish a second parallel driving mode;

the power transmission route 1 in this drive mode is: the engine 1- > the second clutch 5- > the second input shaft 13- > the second gear set 21- > the output shaft 19;

the power transmission route 2 is: the output shaft 19 of the second motor 3-;

the power transmission path in this drive mode is similar to that of fig. 16, and this scheme is not separately illustrated.

(7) Third parallel drive mode

Engaging the third clutch 6, disengaging the first clutch 4 and the second clutch 5, the third synchronizer 11 operatively connecting one of the third gear set 22 and the fourth gear set 23 between the third input shaft 14 and the output shaft 19, the engine 1 driving, at least one of the first electric machine 2 and the second electric machine 3 driving, to establish a third parallel drive mode;

the power transmission route 1 in this drive mode is: the engine 1- > the third clutch 6- > the third input shaft 14- > the third gear set 22 or the fourth gear set 23- > the output shaft 19;

the power transmission route 2 is: the first motor 2- > the third input shaft 14- > the third gear set 22 or the fourth gear set 23- > the output shaft 19;

the power transmission line 3 is: the output shaft 19 of the second motor 3-;

in the

power transmission routes

1 and 2, the gear sets effectively connected between the third input shaft 14 and the output shaft 19 are the same (namely, both the third gear set 22 and the fourth gear set 23), and at least one of the

power transmission routes

2 and 3 exists;

the power transmission path in this drive mode is similar to that of fig. 17-18, and this scheme is not separately illustrated.

In a first parallel drive mode, a second parallel drive mode, and a third parallel drive mode: the hybrid power driving system is driven by the engine 1 and at least one of the first motor 2 and the second motor 3 together, and the four-gear speed ratio output of the engine 1, the two-gear speed ratio output of the first motor 2 and the single-gear speed ratio output of the second motor 3 are realized by switching the first clutch 4, the second clutch 5, the third clutch 6 and the third synchronizer 11.

(8) Direct drive mode of the first Engine (Motor No-load)

The first clutch 4 is engaged, the second clutch 5 and the third clutch 6 are disconnected, the third synchronizer 11 simultaneously disconnects the third gear set 22 from the third input shaft 14 and the output shaft 19 and disconnects the fourth gear set 23 from the third input shaft 14 and the output shaft 19, the engine 1 is driven, and the first motor 2 and the second motor 3 do not work to establish a first engine direct drive mode;

the power transmission route in the driving mode is as follows: the engine 1- > the first clutch 4- > the first input shaft 12- > the first gear set 20- > the output shaft 19;

the power transmission path in this drive mode is similar to that of fig. 19, and this scheme is not separately illustrated.

(9) Second Engine direct drive mode (Motor No-load)

Engaging the second clutch 5, disconnecting the first clutch 4 and the third clutch 6, disconnecting the third synchronizer 11 from the third gear set 22 to the third input shaft 14 and the output shaft 19 and disconnecting the fourth gear set 23 to the third input shaft 14 and the output shaft 19 simultaneously, driving the engine 1, and not operating the first motor 2 and the second motor 3 to establish a second engine direct drive mode;

the power transmission route in the driving mode is as follows: the engine 1- > the second clutch 5- > the second input shaft 13- > the second gear set 21- > the output shaft 19;

the power transmission path in this drive mode is similar to that of fig. 20, and this scheme is not separately illustrated.

(10) Third Engine direct drive mode (Motor no-load)

Engaging the third clutch 6, disengaging the first clutch 4 and the second clutch 5, the third synchronizer 11 operatively connecting one of the third gear set 22 and the fourth gear set 23 between the third input shaft 14 and the output shaft 19, the engine 1 driving, the first electric machine 2 and the second electric machine 3 not operating to establish a third engine direct drive mode;

the power transmission route in the driving mode is as follows: the engine 1- > the third clutch 6- > the third input shaft 14- > the third gear set 22 or the fourth gear set 23- > the output shaft 19.

The power transmission path in this drive mode is similar to that of fig. 21-22 and this scheme is not separately illustrated.

In a first engine direct drive mode, a second engine direct drive mode, and a third engine direct drive mode: the hybrid power driving system is driven by the engine 1, meanwhile, the first motor 2 and the second motor 3 do not work, and the fourth-gear speed ratio output of the engine 1 is realized by switching the first clutch 4, the second clutch 5, the third clutch 6 and the third synchronizer 11.

(11) Fourth Engine direct drive mode (Motor generating)

The first clutch 4 is engaged, the second clutch 5 and the third clutch 6 are disconnected, the third synchronizer 11 simultaneously disconnects the third gear set 22 from the third input shaft 14 and the output shaft 19 and disconnects the fourth gear set 23 from the third input shaft 14 and the output shaft 19, the engine 1 is driven, the first motor 2 does not work, and the second motor 3 generates electricity to establish a fourth engine direct drive mode;

the power transmission route 2 is: the engine 1- > the first clutch 4- > the first input shaft 12- > the first gear set 20- > the output shaft 19- > the second motor 3;

the power transmission path in this drive mode is similar to that of fig. 23, and this scheme is not separately illustrated.

(12) Fifth Engine direct drive mode (Motor generating)

Engaging the second clutch 5, disconnecting the first clutch 4 and the third clutch 6, simultaneously disconnecting the third synchronizer 11 from the third gear set 22 to the third input shaft 14 and the output shaft 19 and simultaneously disconnecting the fourth gear set 23 to the third input shaft 14 and the output shaft 19, driving the engine 1, not operating the first motor 2, and generating electricity by the second motor 3 to establish a fifth engine direct drive mode;

the power transmission route 2 is: the engine 1- > the second clutch 5- > the second input shaft 13- > the second gear set 21- > the output shaft 19- > the second motor 3;

the power transmission path in this drive mode is similar to that of fig. 24, and this scheme is not separately illustrated.

(13) Sixth Engine direct drive mode (Motor generating)

Engaging the third clutch 6, disengaging the first clutch 4 and the second clutch 5, the third synchronizer 11 operatively connecting one of the third gear set 22 and the fourth gear set 23 between the third input shaft 14 and the output shaft 19, the engine 1 driving, at least one of the first electric machine 2 and the second electric machine 3 generating electricity to establish a sixth engine direct drive mode;

the power transmission route 2 is: the engine 1- > the third clutch 6- > the third input shaft 14- > the first electric machine 2;

the power transmission line 3 is: the engine 1- > the third clutch 6- > the third input shaft 14- > the third gear set 22 or the fourth gear set 23- > the output shaft 19- > the second motor 3;

wherein at least one of the

power transmission routes

2, 3 exists;

the power transmission path in this drive mode is similar to that of fig. 25-26, and this scheme is not separately illustrated.

In a fourth engine direct drive mode, a fifth engine direct drive mode, and a sixth engine direct drive mode: the hybrid power driving system is driven by the engine 1, meanwhile, the engine 1 drives at least one of the first motor 2 and the second motor 3 to generate power for the battery, and the fourth-gear speed ratio output of the engine 1 is realized by switching the first clutch 4, the second clutch 5, the third clutch 6 and the third synchronizer 11; to reduce the system load, the second electric machine 3 is used to generate electricity when the first clutch 4 or the second clutch 5 is engaged; when the third clutch 6 is engaged, in order to improve the power generation efficiency, it is preferable to generate power by the second motor 3 only at the time of deceleration braking.

Second embodiment

Referring to fig. 3, in the second embodiment, a fourth clutch 7 is added on the basis of the first embodiment, and the first motor 2 is connected to the third input shaft 14 through the fourth clutch 7, so that the first motor 2 can be disconnected from the third input shaft 14 when the first motor 2 is not required to be driven or generate power, and the load of the engine 1 when the engine outputs power through the third input shaft 14 is reduced. The other structures of the second embodiment are the same as those of the first embodiment, and are not described herein again.

When the first motor 2 is required to drive or generate power, the fourth clutch 7 is engaged, and the first motor 2 can be connected to a driving circuit and a power generation circuit; when the first motor 2 is not required to drive or generate electricity, the fourth clutch 7 is disconnected, so that the first motor 2 can be disconnected with a driving circuit and a generating circuit, the load is reduced, and the vehicle economy is improved.

If the fourth clutch 7 is engaged: the power transmission route from the third input shaft 14 to the first electric machine 2 is: the third input shaft 14- > the fourth clutch 7- > the first electric machine 2; the power transmission route from the first electric machine 2 to the third input shaft 14 is: the first electric machine 2- > the fourth clutch 7- > the third input shaft 14.

When the first parallel shaft gear set is provided, the fourth clutch 7 may be provided between the first motor 2 and the first parallel shaft gear set or between the first parallel shaft gear set and the third input shaft 14;

when the first planetary gear mechanism is provided, the fourth clutch 7 may not be provided to simplify the structure and control.

The second embodiment provides a hybrid drive system having a plurality of drive modes:

3 pure electric drive modes: a first pure electric drive mode (see fig. 9-10), a second pure electric drive mode (see fig. 11), and a third pure electric drive mode (see fig. 12-13);

series driving mode (see fig. 14);

3 parallel driving modes: a first parallel driving mode (see fig. 15), a second parallel driving mode (see fig. 16), and a third parallel driving mode (see fig. 17-18);

6 Engine direct drive modes: a first engine direct drive mode (see fig. 19), a second engine direct drive mode (see fig. 20), a third engine direct drive mode (see fig. 21-22), a fourth engine direct drive mode (see fig. 23), a fifth engine direct drive mode (see fig. 24), and a sixth engine direct drive mode (see fig. 25-26). Wherein the operation logic in each driving mode is shown in table 2, the third gear set 22 and the fourth gear set 23 are also respectively denoted by GS3 and GS4 in table 2, and the first clutch 4, the second clutch 5, the third clutch 6, the fourth clutch 7, the third synchronizer 11, the first gear set 20, the second gear set 21, the third gear set 22 and the fourth gear set 23 are also respectively denoted by C1, C2, C3, C4, S3, GS1, GS2, GS3 and GS4 in fig. 9 to 26.

Table 2 table of operation logic in each driving mode (second embodiment)

As can be seen from table 1 and table 2, the respective driving modes of the second embodiment are substantially the same as the corresponding driving modes of the first embodiment in the operating states of the first clutch 4, the second clutch 5, the third clutch 6, the engine 1, the first electric machine 2, and the second electric machine 3; the only difference is that:

the second embodiment adds the operating state control of the fourth clutch 7; and to reduce the system load, the second embodiment is preferably driven only by the second electric machine 3 in the third parallel drive mode, the first electric machine 2 does not operate, and is generated only by the second electric machine 3 in the sixth engine direct drive mode, the first electric machine 2 does not operate;

other parts are the same as those of the operation state control and power transmission route of the first embodiment, and the second embodiment will not be described again.

Third embodiment

Referring to fig. 4, in the third embodiment, a fifth clutch 8 is added on the basis of the first embodiment, the second motor 3 is connected to the output shaft 19 through the fifth clutch 8, and when the second motor 3 is not required to be driven or generate power, the connection between the second motor 3 and the output shaft 19 can be disconnected through the fifth clutch 8 or the fifth synchronizer, so that the system load is reduced. The other structures of the third embodiment are the same as those of the first embodiment, and are not described again here.

When the second motor 3 is required to drive or generate power, the fifth clutch 8 is engaged, and the second motor 3 can be connected into a driving circuit and a power generation circuit; when the second motor 3 is not required to be driven or generate power, the fifth clutch 8 is disconnected, so that the second motor 3 can be disconnected from a driving circuit and a power generation circuit, the load is reduced, and the vehicle economy is improved.

If the fifth clutch 8 is engaged: the power transmission route from the output shaft 19 to the second electric machine 3 is: the output shaft 19- > the fifth clutch 8- > the second motor 3; the power transmission route from the second electric machine 3 to the output shaft 19 is: the second motor 3- > the fifth clutch 8- > the output shaft 19.

When a second parallel shaft gear set is provided, the fifth clutch 8 may be provided between the second motor 3 and the second parallel shaft gear set or between the second parallel shaft gear set and the output shaft 19;

when the second planetary gear mechanism is provided, the fifth clutch 8 may not be provided to simplify the structure and control.

The hybrid drive system provided by the third embodiment has the same drive mode as that of the first embodiment, and is not described herein again.

The logic for operation in each drive mode is shown in table 3, with the third and

fourth gearsets

22 and 23 also being represented in table 3 as GS3 and GS4, respectively.

Table 3 table of operation logic in each driving mode (third embodiment)

As can be seen from table 1 and table 3, the respective driving modes of the third embodiment are substantially the same as the corresponding driving modes of the first embodiment in the operating states of the first clutch 4, the second clutch 5, the third clutch 6, the engine 1, the first electric machine 2, and the second electric machine 3; the only difference is that:

the third embodiment adds the operating state control of the fifth clutch 8; and to reduce system load, the third embodiment is preferably driven by only the first motor 2, with the second motor 3 not operating, in a third parallel drive mode;

other parts are the same as those of the operation state control and power transmission route of the first embodiment, and the third embodiment will not be described again.

Fourth embodiment

In the fourth embodiment, a fifth clutch is additionally arranged on the second embodiment, the second motor 3 is connected with the output shaft 19 through the fifth clutch, and when the second motor 3 is not required to drive or generate power, the connection between the second motor 3 and the output shaft 19 can be disconnected through the fifth clutch or the fifth synchronizer, so that the system load is reduced. The other structures of the fourth embodiment are the same as those of the second embodiment, and are not described again here.

When the second motor 3 is required to drive or generate power, the fifth clutch is engaged, and the second motor 3 can be connected into a driving circuit and a power generation circuit; when the second motor 3 is not required to be driven or generate power, the fifth clutch is disconnected, so that the second motor 3 can be disconnected with a driving circuit and a power generation circuit, the load is reduced, and the vehicle economy is improved.

If the fifth clutch is engaged: the power transmission route from the output shaft 19 to the second electric machine 3 is: the output shaft 19- > the fifth clutch- > the second motor 3; the power transmission route from the second electric machine 3 to the output shaft 19 is: the second motor 3- > the fifth clutch- > the output shaft 19.

When the second parallel shaft gear set 17 is provided, the fifth clutch may be provided between the second motor 3 and the second parallel shaft gear set 17 or between the second parallel shaft gear set 17 and the output shaft 19;

when the second planetary gear mechanism 18 is provided, the fifth clutch may not be provided to simplify the structure and control.

The hybrid drive system provided by the fourth embodiment has the same drive mode as the second embodiment, and is not described herein again.

Each drive mode of the fourth embodiment is substantially the same as the corresponding drive mode of the second embodiment in the operating states of the first clutch 4, the second clutch 5, the third clutch 6, the engine 1, the first motor 2, and the second motor 3; the only difference is that:

the fourth embodiment adds the operating state control of the fifth clutch; the fourth embodiment may be driven by one of the first motor 2 and the second motor 3, with the other of the first motor 2 and the second motor 3 being inactive, in the third parallel drive mode, may generate power by one of the first motor 2 and the second motor 3, with the other of the first motor 2 and the second motor 3 being inactive, in the sixth engine direct drive mode;

other parts are the same as those of the operation state control and power transmission route of the second embodiment, and the fourth embodiment will not be described again.

Fifth embodiment

Referring to fig. 5 to 8, a hybrid drive system according to a fifth embodiment of the present invention includes an engine 1, a first motor 2, a second motor 3, a first clutch 4, a second clutch 5, a third clutch 6, a first input shaft 12, a second input shaft 13, a third input shaft 14, an output shaft 19, a first gear set 20, a second gear set 21, a third gear set 22, and a fourth gear set 23, where the first gear set 20, the second gear set 21, the third gear set 22, and the fourth gear set 23 correspond to four speed ratios;

the first motor 2 and the second motor 3 are respectively connected with the third input shaft 14 and the output shaft 19;

the hybrid power driving system further comprises a first synchronizer 9 and a second synchronizer 10, and the first input shaft 12 and the second input shaft 13 are further connected with an output shaft 19 in a speed reduction mode through a third gear set 22 and a fourth gear set 23 respectively; the first synchronizer 9 operatively connects one of the first and third gear sets 20, 22 between the first input shaft 12 and the output shaft 19, or disconnects both the first gear set 20 to the first input shaft 12 and the output shaft 19 and the third gear set 22 to the first input shaft 12 and the output shaft 19; the second synchronizer 10 operatively connects one of the second gear set 21 and the fourth gear set 23 between the second input shaft 13 and the output shaft 19 or disconnects both the second gear set 21 from the second input shaft 13 and the output shaft 19 and the fourth gear set 23 from the second input shaft 13 and the output shaft 19.

By controlling the engagement or disengagement of the first clutch 4 and the second clutch 5 and the engagement or disengagement of the first synchronizer 9 and the second synchronizer 10, the power of the engine 1 can be selectively transmitted to the output shaft 19 through one of the first gear set 20, the second gear set 21, the third gear set 22 and the fourth gear set 23, so that the engine 1 can output four speed ratios, and four-gear speed change of the engine 1 is realized; by controlling the connection or disconnection of the third clutch 6, the first motor 2 can be used for generating power or disconnecting the first motor 2 from the engine 1, the second motor 3 can be used for generating power or driving, a pure electric driving mode, a series driving mode, a parallel driving mode and an engine direct driving mode can be realized, and multiple driving modes have multiple gears, so that different driving force requirements of the engine 1 can be met, the engine 1 can work in a region with higher fuel economy as far as possible, the first motor 2 and the second motor 3 work in a region with higher economy, the efficiency problem and the electric balance problem of the engine 1 at low speed and medium speed and the dynamic problem of the engine 1 at high speed are solved, the working efficiency of the system is high, and the vehicle economy is improved; the hybrid power driving system is simple and compact in structure, the number of used parts is small, the structural complexity of the hybrid power driving system is reduced, energy transmission loss is small, and system efficiency is improved.

In addition, referring to fig. 5 to 6, the hybrid drive system further includes a final drive 24 and a differential 25, the final drive 24 is connected to the output end of the output shaft 19, and the differential 25 is connected between the final drive 24 and the wheels 26, so as to transmit the power of the output shaft 19 to the wheels 26 through the final drive 24 and the differential 25, and drive the vehicle to run. Of course, an output member for transmitting power may be provided between the output shaft 19 and the final drive 24.

Preferably, the first synchronizer 9 is disposed on the first input shaft 12 (not shown) or the output shaft 19 (see fig. 5), and the second synchronizer 10 is disposed on the second input shaft 13 (not shown) or the output shaft 19 (see fig. 5); the structure is simple and compact, and the first synchronizer 9 and the second synchronizer 10 are arranged on the output shaft 19, so that the system load is reduced.

Preferably, the third input shaft 14 is connected to the first electric machine 2 at a speed increasing rate through a first parallel shaft gear set 15 (see fig. 6 and 8) or a first planetary gear mechanism 16 (see fig. 5 and 7), which is beneficial to improving the efficiency of the engine 1 driving the first electric machine 2 to generate electricity. The structure of the first embodiment in which the third input shaft 14 is connected to the first electric motor 2 via the first parallel-shaft gear set 15 or the first planetary gear set 16 in a speed-increasing manner is the same as that of the second embodiment, and reference is made to fig. 5 to 8, which are not separately shown here.

Specifically, referring to fig. 6 and 8, the first parallel shaft gear set 15 may include a fifth driving gear 151 disposed on the third input shaft 14 and a fifth driven gear 152 disposed on the crankshaft of the first motor 2.

Preferably, the second electric machine 3 is connected to the output shaft 19 through the second parallel shaft gear set 17 (see fig. 8) or the second planetary gear mechanism 18 (see fig. 7) in a speed reduction manner, so as to realize speed reduction and flow increase.

Specifically, referring to fig. 8, the second parallel shaft gear set 17 may include a sixth driving gear 171 provided on the crankshaft of the second motor 3 and a sixth driven gear 182 provided on the output shaft 19.

Preferably, referring to fig. 5, the first gear set 20 includes a first driving gear 201 disposed on the first input shaft 12 and a first driven gear 202 disposed on the output shaft 19, the first driving gear 201 is engaged with the first driven gear 202;

the second gear set 21 includes a second driving gear 211 provided on the second input shaft 13 and a second driven gear 212 provided on the output shaft 19,

the second driving gear 211 is engaged with the second driven gear 212;

the third driving gear 221 and the fourth driving gear 231 are respectively arranged on the first input shaft 12 and the second input shaft 13; the power output path is simplified, the structure is simpler and more compact, and the reduction of energy transmission loss and the miniaturization of a hybrid power driving system are facilitated.

More preferably, the first driving gear 201 and the third driving gear 221 are both rotatably disposed on the first input shaft 12, and the first synchronizer 9 is disposed on the first input shaft 12 and can be selectively connected to the first driving gear 201 or the third driving gear 221 (not shown); or the first driven gear 202 and the third driven gear 222 are both rotatably arranged on the output shaft 19, and the first synchronizer 9 is arranged on the output shaft 19 and can be selectively connected with the first driven gear 202 or the third driven gear 222 (see fig. 5);

the second driving gear 211 and the fourth driving gear 231 are both rotatably disposed on the second input shaft 13, and the second synchronizer 10 is disposed on the second input shaft 13 and selectively connected to the second driving gear 211 or the fourth driving gear 231 (not shown); or the second driven gear 212 and the fourth driven gear 232 are both rotatably arranged on the output shaft 19, and the second synchronizer 10 is arranged on the output shaft 19 and can be selectively connected with the second driven gear 212 or the fourth driven gear 232 (refer to fig. 5).

Preferably, referring to fig. 5, the first clutch 4, the second clutch 5 and the third clutch 6 are integrated three clutches, the first input shaft 12 and the second input shaft 13 are hollow shafts, the first input shaft 12 is rotatably disposed in a shaft hole of the second input shaft 13, and the third input shaft 14 is rotatably disposed in a shaft hole of the first input shaft 12; the structure is simple and compact, the miniaturization of a hybrid power driving system is facilitated, and the energy transmission loss is reduced as much as possible.

More preferably, the first clutch 4, the second clutch 5 and the third clutch 6 are coaxially and fixedly arranged; the third clutch 6 is embedded in the first clutch 4 and the second clutch 5 (see fig. 5), or the first clutch 4 and the third clutch 6 are embedded in the second clutch 5 (not shown). The integration of the first clutch 4, the second clutch 5 and the third clutch 6 is realized, the third clutch 6 corresponding to the third input shaft 14 positioned at the center in the input shaft is arranged at the inner layer of the integrated three-clutch, the second clutch 5 corresponding to the second input shaft 13 positioned at the outermost layer in the input shaft is arranged at the outer layer in the integrated three-clutch, and the first clutch 4 corresponding to the first input shaft 12 positioned in the middle in the input shaft is arranged at the inner layer or the outer layer in the integrated three-clutch.

More preferably, referring to fig. 5, the driven part of the first clutch 4 is closer to the axis of the first electric machine 2 than the driving part, the driven part of the second clutch 5 is closer to the axis of the first electric machine 2 than the driving part, and the driven part of the second clutch 5 is closer to the axis of the first electric machine 2 than the driving part, which is beneficial to reduce the size of the first input shaft 12, the second input shaft 13 and the third input shaft 14, thereby reducing the load.

The fifth embodiment provides a hybrid drive system having a plurality of drive modes: the hybrid drive system comprises a pure electric drive mode, a series drive mode, 2 parallel drive modes (a first parallel drive mode and a second parallel drive mode), and 4 engine direct drive modes (a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode and a fourth engine direct drive mode). The operation logic in each driving mode is shown in table 4; the first, second, third and fourth gear sets 20, 21, 22 and 23 are also denoted in table 4 by GS1, GS2, GS3 and GS4, respectively.

Table 4 table of operation logic in each driving mode (fifth embodiment)

Hereinafter, the power transmission route in each drive mode will be described in detail with reference to fig. 5.

Referring to fig. 5, when the first synchronizer 9 is disposed on the output shaft 19, the power path from the first input shaft 12 to the output shaft 19 is: the first input shaft 12- > the first gear set 20 or the third gear set 22- > the first synchronizer 9- > the output shaft 19;

when the first synchronizer 9 is provided on the first input shaft 12, the power path from the first input shaft 12 to the output shaft 19 is, not shown: the first input shaft 12- > the first synchronizer 9- > the first gear set 20 or the third gear set 22- > the output shaft 19;

referring to fig. 5, when the second synchronizer 10 is disposed on the output shaft 19, the power path from the second input shaft 13 to the output shaft 19 is: the second input shaft 13- > the second gear set 21 or the fourth gear set 23- > the second synchronizer 10- > the output shaft 19;

when the second synchronizer 10 is provided on the second input shaft 13, the power path from the second input shaft 13 to the output shaft 19 is, not shown: the second input shaft 13- > the second synchronizer 10- > the second gear set 21 or the fourth gear set 23- > the output shaft 19;

(1) Pure electric drive mode

The first clutch 4, the second clutch 5 and the third clutch 6 are disconnected, the first synchronizer 9 simultaneously disconnects the first gear set 20 from the first input shaft 12 and the output shaft 19 and disconnects the third gear set 22 from the first input shaft 12 and the output shaft 19, the second synchronizer 10 simultaneously disconnects the second gear set 21 from the second input shaft 13 and the output shaft 19 and disconnects the fourth gear set 23 from the second input shaft 13 and the output shaft 19, the engine 1 does not work, the first motor 2 does not work, and the second motor 3 drives to establish a pure electric driving mode;

in the pure electric drive mode: the hybrid power driving system drives the wheels 26 by using the second motor 3, and simultaneously the engine 1 and the first motor 2 do not work, so that the single-gear speed ratio output of the second motor 3 is realized.

(2) Series drive mode

The first clutch 4 and the second clutch 5 are disconnected, the third clutch 6 is engaged, the first synchronizer 9 simultaneously disconnects the first gear set 20 from the first input shaft 12 and the output shaft 19 and disconnects the third gear set 22 from the first input shaft 12 and the output shaft 19, the second synchronizer 10 simultaneously disconnects the second gear set 21 from the second input shaft 13 and the output shaft 19 and disconnects the fourth gear set 23 from the second input shaft 13 and the output shaft 19, the engine 1 drives, the first motor 2 generates power, and the second motor 3 drives to establish a series driving mode;

the power transmission route 2 is: the output shaft 19 of the second motor 3-;

(3) First parallel driving mode

The first clutch 4 is engaged, the second clutch 5 is disengaged, the first synchronizer 9 effectively connects one of the first gear set 20 and the third gear set 22 between the first input shaft 12 and the output shaft 19, the second synchronizer 10 simultaneously disconnects the second gear set 21 from the second input shaft 13 and the output shaft 19 and disconnects the fourth gear set 23 from the second input shaft 13 and the output shaft 19, the engine 1 is driven, the second motor 3 is driven,

engaging the third clutch 6, the first electrical machine 2 generates electricity, or

The third clutch 6 is disengaged and the first electric machine 2 is deactivated to establish the first parallel drive mode;

the power transmission route 1 in this drive mode is: the engine 1- > the first clutch 4- > the first input shaft 12- > the first gear set 20 or the third gear set 22- > the output shaft 19;

the power transmission route 2 is: the output shaft 19 of the second motor 3-;

the power transmission line 3 is: the engine 1- > the third clutch 6- > the third input shaft 14- > the first electric machine 2.

(4) Second parallel drive mode

The second clutch 5 is engaged, the first clutch 4 is disengaged, the first synchronizer 9 simultaneously disconnects the first gear set 20 from the first input shaft 12 and the output shaft 19 and the third gear set 22 from the first input shaft 12 and the output shaft 19, the second synchronizer 10 effectively connects one of the second gear set 21 and the fourth gear set 23 between the second input shaft 13 and the output shaft 19, the engine 1 is driven, the second motor 3 is driven,

The third clutch 6 is disengaged and the first electric machine 2 is deactivated to establish a second parallel drive mode;

the power transmission route 1 in this drive mode is: the engine 1- > the second clutch 5- > the second input shaft 13- > the second gear set 21 or the fourth gear set 23- > the output shaft 19;

the power transmission route 2 is: the output shaft 19 of the second motor 3-;

In a first parallel drive mode and a second parallel drive mode: the hybrid power driving system is driven by the engine 1 and the second motor 3 together, the fourth-gear speed ratio output of the engine 1 is realized by switching the first clutch 4, the second clutch 5, the first synchronizer 9 and the second synchronizer 10, and the third clutch 6 is not required to be disconnected when the first motor 2 generates electricity so as to reduce the system load.

(5) Direct drive mode of the first Engine (Motor No-load)

Engaging the first clutch 4, disengaging the second clutch 5 and the third clutch 6, operatively connecting one of the first gear set 20 and the third gear set 22 between the first input shaft 12 and the output shaft 19 by the first synchronizer 9, simultaneously disconnecting the second input shaft 13 and the output shaft 19 by the second gear set 21 and the second input shaft 13 and the output shaft 19 by the fourth gear set 23 by the second synchronizer 10, driving the engine 1, and deactivating the first electric machine 2 and the second electric machine 3 to establish a first engine direct drive mode;

the power transmission route in the driving mode is as follows: the engine 1- > the first clutch 4- > the first input shaft 12- > the first gear set 20 or the third gear set 22- > the output shaft 19.

(6) Second Engine direct drive mode (Motor No-load)

Engaging the second clutch 5, disconnecting the first clutch 4 and the third clutch 6, simultaneously disconnecting the first gear set 20 from the first input shaft 12 and the output shaft 19 and disconnecting the third gear set 22 from the first input shaft 12 and the output shaft 19 by the first synchronizer 9, effectively connecting one of the second gear set 21 and the fourth gear set 23 between the second input shaft 13 and the output shaft 19 by the second synchronizer 10, driving the engine 1, and not operating the first motor 2 and the second motor 3 to establish a second engine direct drive mode;

the power transmission route in the driving mode is as follows: the engine 1- > the second clutch 5- > the second input shaft 13- > the second gear set 21 or the fourth gear set 23- > the output shaft 19.

In a first engine direct drive mode and a second engine direct drive mode: the hybrid power driving system is driven by the engine 1, meanwhile, the first motor 2 and the second motor 3 do not work, and the fourth-gear speed ratio output of the engine 1 is realized by switching the first clutch 4, the second clutch 5, the first synchronizer 9 and the second synchronizer 10.

(7) Third Engine direct drive mode (Motor generating)

The first clutch 4 is engaged, the second clutch 5 is disengaged, the first synchronizer 9 effectively connects one of the first gear set 20 and the third gear set 22 between the first input shaft 12 and the output shaft 19, the second synchronizer 10 simultaneously disconnects the second gear set 21 from the second input shaft 13 and the output shaft 19 and disconnects the fourth gear set 23 from the second input shaft 13 and the output shaft 19, the engine 1 drives,

the third clutch 6 is engaged, the first motor 2 generates power, the second motor 3 generates power or does not work,

the third clutch 6 is disconnected, the first motor 2 does not work, and the second motor 3 generates electricity to establish a third engine direct drive mode;

the power transmission route 1 in this drive mode is: the power transmission route 1 in this drive mode is: the engine 1- > the second clutch 5- > the second input shaft 13- > the second gear set 21 or the fourth gear set 23- > the output shaft 19;

the power transmission route 2 is: engine 1- > third clutch 6- > third input shaft 14- > first motor 2

The power transmission line 3 is: the engine 1- > the second clutch 5- > the second input shaft 13- > the second gear set 21 or the fourth gear set 23- > the output shaft 19- > the second motor 3;

at least one of the

power transmission lines

2 and 3 is present.

(8) Fourth Engine direct drive mode (Motor generating)

The second clutch 5 is engaged, the first clutch 4 is disengaged, the first synchronizer 9 simultaneously disconnects the first gear set 20 from the first input shaft 12 and the output shaft 19 and the third gear set 22 from the first input shaft 12 and the output shaft 19, the second synchronizer 10 operatively connects one of the second gear set 21 and the fourth gear set 23 between the second input shaft 13 and the output shaft 19, the engine 1 drives,

the third clutch 6 is disconnected, the first motor 2 does not work, and the second motor 3 generates electricity to establish a fourth engine direct drive mode;

at least one of the

power transmission lines

2 and 3 is present.

In a third engine direct drive mode and a fourth engine direct drive mode: the hybrid power driving system is driven by the engine 1, meanwhile, the engine 1 drives at least one of the first motor 2 and the second motor 3 to generate power for the battery, and the fourth-gear speed ratio output of the engine 1 is realized by switching the first clutch 4, the second clutch 5, the first synchronizer 9 and the second synchronizer 10; in order to improve the power generation efficiency, it is preferable that the second electric machine 3 is used to generate power only when the vehicle is decelerated and braked.

Sixth embodiment

The sixth embodiment is additionally provided with a fifth clutch on the basis of the fifth embodiment, the second motor 3 is connected with the output shaft 19 through the fifth clutch, and when the second motor 3 is not required to drive or generate power, the connection between the second motor 3 and the output shaft 19 can be disconnected through the fifth clutch or a fifth synchronizer, so that the system load is reduced. The other structures of the sixth embodiment are the same as those of the fifth embodiment, and are not described again here.

The hybrid drive system provided by the sixth embodiment has the same drive mode as that of the fifth embodiment, and is not described herein again; each drive mode of the sixth embodiment is substantially the same as the corresponding drive mode of the fifth embodiment in the operating states of the first clutch 4, the second clutch 5, the third clutch 6, the first synchronizer 9, the second synchronizer 10, the engine 1, the first motor 2, and the second motor 3; the only difference is that:

the sixth embodiment adds the operating state control of the fifth clutch 8; the rest of the operation state control and the power transmission route in the fifth embodiment are the same, and the description of the sixth embodiment is omitted.

Seventh embodiment

Referring to fig. 27, a seventh embodiment of the present invention further provides a vehicle 100 including a hybrid drive system 200 of the first, second, third, fourth, fifth, or sixth embodiment.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hybrid power driving system is characterized by comprising an engine, a first motor, a second motor, a first clutch, a second clutch, a third clutch, a first input shaft, a second input shaft, a third input shaft, an output shaft, a first gear set, a second gear set, a third gear set and a fourth gear set, wherein the first gear set, the second gear set, the third gear set and the fourth gear set correspond to four speed ratios;

the first input shaft is connected with the output shaft in a speed reduction way through the first gear set;

the second input shaft is connected with the output shaft in a speed reduction way through the second gear set;

2. The hybrid drive system of claim 1 wherein said first synchronizer is provided on said first input shaft or said output shaft, said second synchronizer is provided on said second input shaft or said output shaft, and said third synchronizer is provided on said third input shaft or said output shaft.

3. The hybrid drive system of claim 1, wherein the first electric machine is connected to the third input shaft through a fourth clutch when the third synchronizer is present.

4. A hybrid drive system according to claim 1 or 3, wherein the second electric machine is connected to the output shaft via a fifth clutch.

5. The hybrid drive system of claim 1, wherein the third input shaft is speed-increased in connection with the first electric machine by a first parallel-axis gear set or a first planetary gear mechanism.

6. The hybrid drive system of claim 1 or 5, wherein the second electric machine is connected in a speed-reducing manner to the output shaft via a second parallel-axis gear set or a second planetary gear mechanism.

7. The hybrid drive system of claim 1, wherein said first gear set includes a first drive gear disposed on said first input shaft and a first driven gear disposed on said output shaft, said first drive gear being in meshing engagement with said first driven gear;

the second gear set comprises a second driving gear arranged on the second input shaft and a second driven gear arranged on the output shaft, and the second driving gear is meshed with the second driven gear;

the third gear set comprises a third driving gear and a third driven gear arranged on the output shaft, and the third driving gear is meshed with the third driven gear;

the fourth gear set comprises a fourth driving gear and a fourth driven gear arranged on the output shaft, and the fourth driving gear is meshed with the fourth driven gear;

when the first synchronizer and the second synchronizer are arranged, the third driving gear and the fourth driving gear are respectively arranged on the first input shaft and the second input shaft; when the third synchronizer is arranged, the third driving gear and the fourth driving gear are both arranged on the third input shaft.

8. The hybrid drive system of claim 1, wherein said first clutch, said second clutch and said third clutch are integrated three clutches, said first input shaft and said second input shaft are hollow shafts, said first input shaft is rotatably disposed within a shaft bore of said second input shaft, and said third input shaft is rotatably disposed within a shaft bore of said first input shaft.

9. The hybrid drive system of claim 8, wherein the first clutch, the second clutch, and the third clutch are coaxially fixed;

the third clutch is embedded in the first clutch and the second clutch, or the first clutch and the third clutch are embedded in the second clutch.

10. The hybrid drive system of claim 1, wherein when the first synchronizer and the second synchronizer are present, the hybrid drive system has an electric only drive mode, a series drive mode, a first parallel drive mode, a second parallel drive mode, a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, and a fourth engine direct drive mode; wherein the content of the first and second substances,

disconnecting the first clutch, the second clutch and the third clutch, disconnecting the first gear set from the first input shaft and the output shaft and disconnecting the third gear set from the first input shaft and the output shaft simultaneously, disconnecting the second gear set from the second input shaft and the output shaft simultaneously and disconnecting the fourth gear set from the second input shaft and the output shaft simultaneously, so that the engine does not work, the first motor does not work, and the second motor drives to establish an electric-only driving mode;

disconnecting the first clutch and the second clutch, engaging the third clutch, disconnecting the first gear set from the first input shaft and the output shaft and disconnecting the third gear set from the first input shaft and the output shaft simultaneously, disconnecting the second gear set from the second input shaft and the output shaft simultaneously, and disconnecting the fourth gear set from the second input shaft and the output shaft simultaneously, driving the engine, generating electricity by the first motor, and driving the second motor to establish a series drive mode;

engaging the first clutch, disengaging the second clutch, the first synchronizer operatively connecting one of the first and third gear sets between the first input shaft and the output shaft, the second synchronizer simultaneously disconnecting the second gear set from the second input shaft and the output shaft and the fourth gear set from the second input shaft and the output shaft, the engine driving, the second motor driving,

engaging the third clutch, the first motor generating electricity, or

Disconnecting the third clutch, the first motor not operating to establish a first parallel drive mode;

engaging the second clutch, disengaging the first clutch, the first synchronizer simultaneously disconnecting the first gear set from the first input shaft and the output shaft and the third gear set from the first input shaft and the output shaft, the second synchronizer operatively connecting one of the second gear set and the fourth gear set between the second input shaft and the output shaft, the engine driving, the second motor driving,

engaging the third clutch, the first motor generating electricity, or

Disconnecting the third clutch, the first motor not operating to establish a second parallel drive mode;

engaging the first clutch and disengaging the second clutch and the third clutch, the first synchronizer operatively connecting one of the first and third gear sets between the first input shaft and the output shaft, the second synchronizer simultaneously disengaging the connection of the second gear set to the second input shaft and the output shaft and the connection of the fourth gear set to the second input shaft and the output shaft, the engine driving, the first electric machine and the second electric machine not operating to establish a first engine direct drive mode;

engaging the second clutch, disengaging the first clutch and the third clutch, the first synchronizer simultaneously disconnecting the first gear set from the first input shaft and the output shaft and the third gear set from the first input shaft and the output shaft, the second synchronizer operatively connecting one of the second gear set and the fourth gear set between the second input shaft and the output shaft, the engine driving, the first electric machine and the second electric machine not operating to establish a second engine direct drive mode;

engaging the first clutch, disengaging the second clutch, the first synchronizer operatively connecting one of the first and third gear sets between the first input shaft and the output shaft, the second synchronizer simultaneously disconnecting the second gear set from the second input shaft and the output shaft and the fourth gear set from the second input shaft and the output shaft, the engine driving,

engaging the third clutch, the first motor generating electricity, the second motor generating electricity or not operating,

disconnecting the third clutch, the first motor not operating, the second motor generating electricity to establish a third engine direct drive mode;

engaging the second clutch, disengaging the first clutch, the first synchronizer simultaneously disconnecting the first gear set from the first input shaft and the output shaft and the third gear set from the first input shaft and the output shaft, the second synchronizer operatively connecting one of the second gear set and the fourth gear set between the second input shaft and the output shaft, the engine driving,

disconnecting the third clutch, the first motor not operating, the second motor generating electricity to establish a fourth engine direct drive mode;

when the third synchronizer is arranged, the hybrid power driving system has a first pure electric driving mode, a second pure electric driving mode, a third pure electric driving mode, a series driving mode, a first parallel driving mode, a second parallel driving mode, a third parallel driving mode, a first engine direct driving mode, a second engine direct driving mode, a third engine direct driving mode, a fourth engine direct driving mode, a fifth engine direct driving mode and a sixth engine direct driving mode; wherein the content of the first and second substances,

disconnecting the first clutch, the second clutch and the third clutch, wherein the third synchronizer effectively connects one of the third gear set and the fourth gear set between the third input shaft and the output shaft, the engine does not work, the first motor drives, and the second motor does not work to establish a first pure electric drive mode;

disconnecting the first clutch, the second clutch and the third clutch, disconnecting the third gear set from the third input shaft and the output shaft and simultaneously disconnecting the fourth gear set from the third input shaft and the output shaft by the third synchronizer, wherein the engine does not work, the first motor does not work, and the second motor is driven to establish a second pure electric driving mode;

disconnecting the first clutch, the second clutch and the third clutch, wherein the third synchronizer effectively connects one of the third gear set and the fourth gear set between the third input shaft and the output shaft, the engine does not work, the first motor drives, and the second motor drives to establish a third pure electric drive mode;

disconnecting the first clutch and the second clutch, engaging the third clutch, disconnecting the third gear set from the third input shaft and the output shaft and disconnecting the fourth gear set from the third input shaft and the output shaft simultaneously, the engine driving, the first motor generating electricity, the second motor driving to establish a series drive mode;

engaging the first clutch, disengaging the second clutch and the third clutch, simultaneously disengaging the third synchronizer from the connection of the third gear set to the third input shaft and the output shaft and the connection of the fourth gear set to the third input shaft and the output shaft, the engine being driven, the first motor being inoperative, the second motor being driven to establish a first parallel drive mode;

engaging the second clutch, disengaging the first clutch and the third clutch, simultaneously disengaging the third synchronizer from the connection of the third gear set to the third input shaft and the output shaft and the connection of the fourth gear set to the third input shaft and the output shaft, the engine being driven, the first motor being inoperative, the second motor being driven to establish a second parallel drive mode;

engaging the third clutch and disengaging the first clutch and the second clutch, the third synchronizer operatively connecting one of the third gear set and the fourth gear set between the third input shaft and the output shaft, the engine driving, at least one of the first electric machine and the second electric machine driving to establish a third parallel drive mode;

engaging the first clutch, disengaging the second clutch and the third clutch, simultaneously disengaging the third synchronizer from the connection of the third gear set to the third input shaft and the output shaft and the fourth gear set to the third input shaft and the output shaft, the engine being driven, the first electric machine and the second electric machine being deactivated to establish a first engine direct drive mode;

engaging the second clutch, disengaging the first clutch and the third clutch, simultaneously disengaging the third synchronizer from the connection of the third gear set to the third input shaft and the output shaft and the fourth gear set to the third input shaft and the output shaft, the engine being driven, the first motor and the second motor being inoperative to establish a second engine direct drive mode;

engaging the third clutch and disengaging the first clutch and the second clutch, the third synchronizer operatively connecting one of the third gear set and the fourth gear set between the third input shaft and the output shaft, the engine driving, the first electric machine and the second electric machine not operating to establish a third engine direct drive mode;

engaging the first clutch, disengaging the second clutch and the third clutch, simultaneously disengaging the third synchronizer from the connection of the third gear set to the third input shaft and the output shaft and the connection of the fourth gear set to the third input shaft and the output shaft, the engine being driven, the first motor being inoperative, the second motor generating electricity to establish a fourth engine direct drive mode;

engaging the second clutch, disengaging the first clutch and the third clutch, simultaneously disengaging the third synchronizer from the connection of the third gear set to the third input shaft and the output shaft and the connection of the fourth gear set to the third input shaft and the output shaft, driving the engine, not operating the first motor, generating power by the second motor, and establishing a fifth engine direct drive mode;

engaging the third clutch, disengaging the first clutch and the second clutch, the third synchronizer operatively connecting one of the third and fourth gear sets between the third input shaft and the output shaft, the engine driving, at least one of the first and second electric machines generating electricity to establish a sixth engine direct drive mode.

11. The hybrid drive system of claim 3 having a first electric-only drive mode, a second electric-only drive mode, a third electric-only drive mode, a series drive mode, a first parallel drive mode, a second parallel drive mode, a third parallel drive mode, a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, a fourth engine direct drive mode, a fifth engine direct drive mode, and a sixth engine direct drive mode;

disconnecting the first clutch, the second clutch and the third clutch, engaging the fourth clutch, the third synchronizer operatively connecting one of the third gear set and the fourth gear set between the third input shaft and the output shaft, the engine not operating, the first motor driving, the second motor not operating to establish a first electric-only drive mode;

disconnecting the first clutch, the second clutch, the third clutch and the fourth clutch, disconnecting the third gear set from the connection between the third input shaft and the output shaft and disconnecting the fourth gear set from the connection between the third input shaft and the output shaft simultaneously, wherein the engine does not work, the first motor does not work, and the second motor drives to establish a second pure electric drive mode;

disconnecting the first clutch, the second clutch, and the third clutch, engaging the fourth clutch, the third synchronizer operatively connecting one of the third gear set and the fourth gear set between the third input shaft and the output shaft, the engine not operating, the first motor driving, the second motor driving to establish a third electric-only drive mode;

disconnecting the first clutch and the second clutch, engaging the third clutch and the fourth clutch, disconnecting the third gear set from the third input shaft and the output shaft and disconnecting the fourth gear set from the third input shaft and the output shaft simultaneously, the engine driving, the first motor generating electricity, the second motor driving to establish a series drive mode;

engaging the first clutch, disengaging the second clutch, the third clutch and the fourth clutch, simultaneously disengaging the third gear set from connecting the third input shaft and the output shaft and the fourth gear set from connecting the third input shaft and the output shaft, the engine being driven, the first motor being inoperative, the second motor being driven to establish a first parallel drive mode;

engaging the second clutch, disengaging the first clutch, the third clutch and the fourth clutch, simultaneously disengaging the third gear set from connecting the third input shaft and the output shaft and the fourth gear set from connecting the third input shaft and the output shaft, the engine being driven, the first motor being inoperative, the second motor being driven to establish a second parallel drive mode;

engaging the third clutch and disengaging the first, second and fourth clutches, the third synchronizer operatively connecting one of the third and fourth gear sets between the third input shaft and the output shaft, the engine driven, the first electric machine deactivated, the second electric machine driven to establish a third parallel drive mode;

engaging the first clutch, disengaging the second clutch, the third clutch and the fourth clutch, the third synchronizer simultaneously disengaging the third gear set from connecting the third input shaft and the output shaft and the fourth gear set from connecting the third input shaft and the output shaft, the engine being driven, the first electric machine and the second electric machine being deactivated to establish a first engine direct drive mode;

engaging the second clutch, disengaging the first clutch, the third clutch and the fourth clutch, the third synchronizer simultaneously disengaging the third gear set from connecting the third input shaft and the output shaft and the fourth gear set from connecting the third input shaft and the output shaft, the engine is driven, the first motor and the second motor are not operated, to establish a second engine direct drive mode;

engaging the third clutch and disengaging the first clutch, the second clutch, and the fourth clutch, the third synchronizer operatively connecting one of the third gear set and the fourth gear set between the third input shaft and the output shaft, the engine driven, the first electric machine and the second electric machine deactivated to establish a third engine direct drive mode;

engaging the first clutch, disengaging the second clutch, the third clutch and the fourth clutch, the third synchronizer simultaneously disengaging the third gear set from connecting the third input shaft and the output shaft and the fourth gear set from connecting the third input shaft and the output shaft, the engine is driven, the first motor is not operated, the second motor generates electricity to establish a fourth engine direct drive mode;

engaging the second clutch, disengaging the first clutch, the third clutch and the fourth clutch, simultaneously disengaging the third gear set from connecting the third input shaft and the output shaft and the fourth gear set from connecting the third input shaft and the output shaft, the engine being driven, the first motor being inoperative, the second motor being generating to establish a fifth engine direct drive mode;

engaging the third clutch and disengaging the first, second and fourth clutches, the third synchronizer operatively connecting one of the third and fourth gear sets between the third input shaft and the output shaft, the engine driving, at least one of the first and second electric machines generating electricity to establish a sixth engine direct drive mode.

12. The hybrid drive system of claim 4, wherein when the third synchronizer and the fifth clutch are present, the hybrid drive system has a first electric-only drive mode, a second electric-only drive mode, a third electric-only drive mode, a series drive mode, a first parallel drive mode, a second parallel drive mode, a third parallel drive mode, a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, a fourth engine direct drive mode, a fifth engine direct drive mode, and a sixth engine direct drive mode;

disconnecting the first clutch, the second clutch, the third clutch and the fifth clutch, wherein the third synchronizer effectively connects one of the third gear set and the fourth gear set between the third input shaft and the output shaft, the engine does not work, the first motor drives, and the second motor does not work to establish a first pure electric drive mode;

disconnecting the first clutch, the second clutch and the third clutch, engaging the fifth clutch, disconnecting the third gear set from the third input shaft and the output shaft and disconnecting the fourth gear set from the third input shaft and the output shaft simultaneously, wherein the engine does not work, the first motor does not work, and the second motor drives to establish a second pure electric drive mode;

disconnecting the first clutch, the second clutch and the third clutch, engaging the fifth clutch, the third synchronizer operatively connecting one of the third gear set and the fourth gear set between the third input shaft and the output shaft, the engine not operating, the first motor driving, the second motor driving to establish a third electric-only drive mode;

disconnecting the first clutch and the second clutch, engaging the third clutch and the fifth clutch, disconnecting the third gear set from the third input shaft and the output shaft and disconnecting the fourth gear set from the third input shaft and the output shaft simultaneously, driving the engine, generating power by the first motor, and driving the second motor to establish a series drive mode;

engaging the first clutch and the fifth clutch, disengaging the second clutch and the third clutch, simultaneously disengaging the third synchronizer from the connection of the third gear set to the third input shaft and the output shaft and the connection of the fourth gear set to the third input shaft and the output shaft, the engine being driven, the first motor being inoperative, the second motor being driven to establish a first parallel drive mode;

engaging the second clutch and the fifth clutch, disengaging the first clutch and the third clutch, simultaneously disengaging the third synchronizer from the connection of the third gear set to the third input shaft and the output shaft and the connection of the fourth gear set to the third input shaft and the output shaft, driving the engine, not operating the first motor, and driving the second motor to establish a second parallel driving mode;

engaging the third clutch and disengaging the first, second and fifth clutches, the third synchronizer operatively connecting one of the third and fourth gear sets between the third input shaft and the output shaft, the engine driven, the first motor driven, the second motor deactivated to establish a third parallel drive mode;

engaging the first clutch, disengaging the second clutch, the third clutch and the fifth clutch, the third synchronizer simultaneously disengaging the third gear set from connecting the third input shaft and the output shaft and the fourth gear set from connecting the third input shaft and the output shaft, the engine being driven, the first electric machine and the second electric machine being inoperative to establish a first engine direct drive mode;

engaging the second clutch, disengaging the first clutch, the third clutch and the fifth clutch, the third synchronizer simultaneously disengaging the third gear set from connecting the third input shaft and the output shaft and the fourth gear set from connecting the third input shaft and the output shaft, the engine is driven, and the first motor and the second motor are not operated to establish a second engine direct drive mode;

engaging the third clutch and disengaging the first, second and fifth clutches, the third synchronizer operatively connecting one of the third and fourth gear sets between the third input shaft and the output shaft, the engine driven, the first and second electric machines deactivated to establish a third engine direct drive mode;

engaging the first clutch and the fifth clutch, disengaging the second clutch and the third clutch, simultaneously disengaging the third synchronizer from the connection of the third gear set to the third input shaft and the output shaft and the connection of the fourth gear set to the third input shaft and the output shaft, driving the engine, not operating the first motor, generating power by the second motor, so as to establish a fourth engine direct drive mode;

engaging the second clutch and the fifth clutch, disengaging the first clutch and the third clutch, simultaneously disengaging the third synchronizer from the connection of the third gear set to the third input shaft and the output shaft and the connection of the fourth gear set to the third input shaft and the output shaft, driving the engine, not operating the first motor, generating power by the second motor, so as to establish a fifth engine direct drive mode;

engaging the third clutch, disengaging the first clutch and the second clutch, the third synchronizer operatively connecting one of the third gear set and the fourth gear set between the third input shaft and the output shaft, the engine driving,

the fifth clutch is disconnected, the first motor generates power, the second motor does not work,

engaging the fifth clutch, the first electric machine generating electricity or not operating, the second electric machine generating electricity to establish a sixth engine direct drive mode.

13. A vehicle comprising the hybrid drive system of any one of claims 1-12.