Hybrid Power Coupling System and Vehicle

Abstract

The present invention belongs to the field of new energy vehicles, and relates to a hybrid power coupling system and a vehicle, including an engine, a generator, a drive motor, a first planetary gear mechanism and a second planetary gear mechanism. The first planetary gear mechanism includes a first sun gear, a first planet carrier and a first ring gear, and the second planetary gear mechanism includes a second sun gear, a second planet carrier and a second ring gear; the engine and the generator are respectively connected to an input shaft; the first sun gear is fixedly arranged on the input shaft, the second sun gear is connected to the first ring gear, and the second planet carrier is connected to the first planet carrier; the first planet carrier and the second planet carrier are braked by a first brake, the first ring gear is braked by a second brake, and the first ring gear is connected to the input shaft through a second clutch; the second ring gear and the drive motor are respectively connected to an intermediate shaft; the intermediate shaft outputs power to the wheels; which is beneficial to reducing the system load, can realize multiple driving modes, has higher transmission efficiency, and improves the power performance and economy of the whole vehicle.

Description

Technical Field

[0001] The present invention belongs to the field of new energy vehicles, and particularly relates to a hybrid coupling system and a vehicle. Background Art

[0002] The power system includes an engine (internal combustion engine) and a transmission system composed of a transmission, a differential, and a drive shaft; its function is to provide the driving power required by the vehicle's drive wheels. The internal combustion engine has a certain speed and torque range and reaches its optimal working state within a very small range of this range, at which time either the fuel consumption is minimized, or the harmful emissions are minimized, or both. However, the actual road conditions vary widely, not only in terms of the speed of the drive wheels, but also in terms of the torque required by the drive wheels. Therefore, the primary task of the transmission is to achieve the optimal rotation speed and torque of the internal combustion engine, that is, the optimal power state, and to match it well with the power state of the drive wheels.

[0003] At present, the transmissions on the market are mainly divided into two categories: stepped transmissions and continuously variable transmissions. Stepped transmissions are further subdivided into manual and automatic types. Most of them provide a limited number of discrete input-output speed ratios through different meshing arrangements of gear trains or planetary gear trains. The adjustment of the drive wheel speed between two adjacent speed ratios is achieved by changing the speed of the internal combustion engine. Continuously variable transmissions, whether mechanical, hydraulic, or electro-mechanical, can provide an infinite number of continuously selectable speed ratios within a certain speed range. Theoretically, the speed change of the drive wheels can be completely achieved through the transmission. In this way, the internal combustion engine can work within the optimal speed range as much as possible. At the same time, compared with stepped transmissions, continuously variable transmissions have many advantages such as smooth speed regulation and the ability to make full use of the maximum power of the internal combustion engine. Therefore, continuously variable transmissions have been the object of research by engineers in various countries for many years.

[0004] In recent years, the birth of motor hybrid technology has opened up a new way to achieve a perfect match of power between the internal combustion engine and the driving wheels. Among many powertrain design cases, the most representative ones are the series hybrid system and the parallel hybrid system. In the motor series hybrid system, the internal combustion engine - generator - motor - shaft system - drive wheels form a series power chain, and the powertrain structure is extremely simple. Among them, the generator - motor combination can be regarded as a transmission in the traditional sense. When used in combination with an energy storage device, such as a battery, a capacitor, etc., this transmission can also be used as an energy regulation device to complete independent regulation of speed and torque.

[0005] The motor parallel system has two parallel and independent power chains. One is composed of a traditional mechanical transmission, and the other is composed of a motor - battery system. The mechanical transmission is responsible for adjusting the speed, while the motor - battery system adjusts the power or torque. To give full play to the potential of the entire system, the mechanical transmission also needs to adopt a continuously variable transmission method.

[0006] The advantages of a series hybrid system are its simple structure and flexible layout. However, since all power passes through the generator and the motor, the motor requires a high power, large volume, and heavy weight. At the same time, due to the energy transmission process undergoing two conversions of mechanical - electrical and electrical - mechanical, the efficiency of the entire system is relatively low. In a parallel hybrid system, only part of the power passes through the motor system. Therefore, the power requirement for the motor is relatively low, and the overall system efficiency is high. However, this system requires two independent subsystems, resulting in a high cost and is usually only used in mild hybrid systems.

[0007] An existing power coupling system includes an input component drivingly connected to an engine, a rotary motor having a rotor, a power distribution device that distributes and transmits the torque transmitted to the input component to the rotary motor and a distribution output component, an output gear arranged to output the torque transmitted to the distribution output component to the wheel side, and further includes an output bearing that rotatably supports the distribution output component; a rotor bearing that rotatably supports the rotor. Among them, the power distribution device is integrally arranged radially inside the distribution output component and axially overlaps with the distribution output component at the same position. The ring gear of the power distribution device is integrally provided on the inner peripheral surface of the distribution output component, the output gear is integrally provided on the outer peripheral surface of the distribution output component, and the output bearing and the rotor bearing are axially overlapped. By reasonably controlling the relevant power sources, pure - electric and hybrid drive modes can be achieved. This system is only suitable for urban driving conditions and small and medium - sized vehicles, and for non - urban driving conditions and larger vehicles, the power performance and economy are not very ideal. Summary of the Invention

[0008] The technical problem to be solved by the present invention is: aiming at the problem of insufficient power performance and economy of the existing power coupling system, to provide a hybrid power coupling system and a vehicle.

[0009] To solve the above - mentioned technical problem, an embodiment of the present invention provides a hybrid power coupling system, including an engine, a generator, a drive motor, a first planetary gear mechanism, a second planetary gear mechanism, a first brake, a second brake, a second clutch, an input shaft, and an intermediate shaft. The first planetary gear mechanism includes a first sun gear, a first planet carrier, a first planet gear, and a first ring gear. The second planetary gear mechanism includes a second sun gear, a second planet carrier, a second planet gear, and a second ring gear;

[0010] The engine is connected to the input shaft;

[0011] The generator is connected to the input shaft;

[0012] The first sun gear is fixedly arranged on the input shaft, the second sun gear is connected to the first ring gear, and the second planet carrier is connected to the first planet carrier;

[0013] The first brake is used to brake the first planet carrier and the second planet carrier, the second brake is used to brake the first ring gear, and the first ring gear is connected to the input shaft through the second clutch;

[0014] The second ring gear outputs power to the intermediate shaft;

[0015] The drive motor is connected to the intermediate shaft;

[0016] The intermediate shaft outputs power to the wheels.

[0017] Optionally, it further includes a double planet carrier rotatably sleeved on the input shaft. The double planet carrier includes a connecting frame, the first planet carrier and the second planet carrier. The connecting frame meshes with the first brake, and the first planet carrier and the second planet carrier are fixedly arranged on the connecting frame.

[0018] Optionally, the second sun gear is rotatably sleeved on the connecting frame.

[0019] Optionally, the engine is connected to one end of the input shaft, the generator is connected to the other end of the input shaft. The second clutch is located on the side of the first planetary gear mechanism adjacent to the generator, the first planet carrier is located on the side of the first planetary gear mechanism away from the generator, and the second planet carrier is located on the side of the second planetary gear mechanism away from the generator.

[0020] Optionally, the second sun gear and the first ring gear are of an integral structure.

[0021] Optionally, it further includes a first gear fixedly arranged on the intermediate shaft and a second gear fixedly arranged on the rotating shaft of the drive motor. The second ring gear meshes with the first gear, and the second gear meshes with the first gear. The rotational speed of the second gear is greater than that of the first gear;

[0022] The hybrid power coupling system further includes a speed increasing gear pair, and the input shaft is connected to the generator through the speed increasing gear pair.

[0023] Optionally, it further includes a first clutch, and the rotating shaft of the engine is connected to the input shaft through the first clutch.

[0024] Optionally, the hybrid coupling system has a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, a first hybrid drive mode, a second hybrid drive mode, a third hybrid drive mode, a first dual-motor pure electric mode, a second dual-motor pure electric mode, a third dual-motor pure electric mode, a single-motor pure electric mode, and a series extended range mode;

[0025] Disengage the first brake, disengage the second clutch, engage the second brake, drive the engine, and keep the generator and the drive motor inoperative to establish the first engine direct drive mode;

[0026] Engage the first brake, disengage the second clutch, disengage the second brake, drive the engine, and keep the generator and the drive motor inoperative to establish the second engine direct drive mode;

[0027] Disengage the first brake, engage the second clutch, disengage the second brake, drive the engine, and keep the generator and the drive motor inoperative to establish the third engine direct drive mode;

[0028] Disengage the first brake, disengage the second clutch, engage the second brake, drive the engine, drive the generator or generate electricity under the drive of the engine, and drive the drive motor to establish the first hybrid drive mode;

[0029] Engage the first brake, disengage the second clutch, disengage the second brake, drive the engine, drive the generator or generate electricity under the drive of the engine, and drive the drive motor to establish the second hybrid drive mode;

[0030] Disengage the first brake, engage the second clutch, disengage the second brake, drive the engine, drive the generator or generate electricity under the drive of the engine, and drive the drive motor to establish the third hybrid drive mode;

[0031] Disengage the first brake, disengage the second clutch, engage the second brake, stop the engine, and jointly drive the generator and the drive motor to establish the first dual-motor pure electric mode;

[0032] Engage the first brake, disengage the second clutch, disengage the second brake, stop the engine, and jointly drive the generator and the drive motor to establish the second dual-motor pure electric mode;

[0033] Disengage the first brake, engage the second clutch, disengage the second brake, with the engine not working, and the generator and the drive motor driving together to establish the third dual-motor pure electric mode;

[0034] Disengage the first brake, disengage the second clutch, disengage the second brake, with the engine and the generator not working, and the drive motor driving to establish the single-motor pure electric mode;

[0035] Disengage the first brake, disengage the second clutch, disengage the second brake, with the engine driving the generator to generate electricity and the drive motor driving to establish the series extended-range mode.

[0036] Optionally, the hybrid coupling system has a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, a first hybrid drive mode, a second hybrid drive mode, a third hybrid drive mode, a first dual-motor pure electric mode, a second dual-motor pure electric mode, a third dual-motor pure electric mode, a single-motor pure electric mode, and a series extended-range mode;

[0037] Engage the first clutch, disengage the first brake, disengage the second clutch, engage the second brake, with the engine driving and the generator and the drive motor not working to establish the first engine direct drive mode;

[0038] Engage the first clutch, engage the first brake, disengage the second clutch, disengage the second brake, with the engine driving and the generator and the drive motor not working to establish the second engine direct drive mode;

[0039] Engage the first clutch, disengage the first brake, engage the second clutch, disengage the second brake, with the engine driving and the generator and the drive motor not working to establish the third engine direct drive mode;

[0040] Engage the first clutch, disengage the first brake, disengage the second clutch, engage the second brake, with the engine driving, the generator driving or generating electricity under the drive of the engine, and the drive motor driving to establish the first hybrid drive mode;

[0041] Engage the first clutch, engage the first brake, disengage the second clutch, disengage the second brake, with the engine driving, the generator driving or generating electricity under the drive of the engine, and the drive motor driving to establish the second hybrid drive mode;

[0042] In combination with the first clutch, disengage the first brake, engage the second clutch, disengage the second brake, drive the engine, drive the generator or generate electricity under the drive of the engine, and drive the drive motor to establish the third hybrid drive mode;

[0043] Disengage the first clutch, disengage the first brake, disengage the second clutch, engage the second brake, stop the engine, and jointly drive the generator and the drive motor to establish the first dual-motor pure electric mode;

[0044] Disengage the first clutch, engage the first brake, disengage the second clutch, disengage the second brake, stop the engine, and jointly drive the generator and the drive motor to establish the second dual-motor pure electric mode;

[0045] Disengage the first clutch, disengage the first brake, engage the second clutch, disengage the second brake, stop the engine, and jointly drive the generator and the drive motor to establish the third dual-motor pure electric mode;

[0046] Disengage the first clutch, disengage the first brake, disengage the second clutch, disengage the second brake, stop the engine and the generator, and drive the drive motor to establish the single-motor pure electric mode;

[0047] Engage the first clutch, disengage the first brake, disengage the second clutch, disengage the second brake, drive the engine to drive the generator to generate electricity, and drive the drive motor to establish the series extended-range mode.

[0048] An embodiment of the present invention provides a vehicle, which includes a controller and a battery connected to the controller; and further includes the aforementioned hybrid power coupling system, and the engine, the generator and the drive motor are connected to the controller and controlled by the controller.

[0049] The hybrid power coupling system and vehicle provided by the embodiment of the present invention. When the second clutch is engaged, the first planetary gear mechanism rotates as a whole. The two-stage speed reduction of the engine is realized through the first speed reduction gear pair or the two-stage speed reduction assembly composed of the first planetary gear mechanism and the second speed reduction gear pair. The engine has two gears. When the generator is connected to the ring gear, the first-speed reduction of the generator is realized through the first speed reduction gear pair. When the generator is connected to the input shaft, the two-stage speed reduction of the generator is realized through the first speed reduction gear pair or the two-stage speed reduction assembly composed of the first planetary gear mechanism and the second speed reduction gear pair, significantly improving the power performance of the whole vehicle; By switching the working state (engagement or disengagement) of the first brake and the working state (engagement or disengagement) of the second clutch, the gears of the engine or the generator driving the wheels can be controlled. The drive motor can drive the wheels, and multiple drive modes can be realized, obtaining higher transmission efficiency and improving vehicle economy; The engine and the generator share the speed reduction assembly (the first speed reduction gear pair, or the first planetary gear mechanism and the second speed reduction gear pair), with a simple and compact structure, reducing the number of parts, being beneficial to reducing the system load, improving the power performance of the whole vehicle, being beneficial to reducing the volume, and reducing the cost of the speed reduction assembly;

[0050] In the hybrid drive mode, the dual-motor pure electric mode, the single-motor pure electric mode, and the series extended-range mode, the drive motor is involved in driving to avoid power interruption.

[0051] The hybrid power coupling system effectively supplements the driving power required by the wheels through the power battery, thereby more reasonably allocating the power of the internal combustion engine and keeping the working state of the internal combustion engine unaffected or less affected by road conditions. The internal combustion engine can always work in the set optimal state to improve the fuel efficiency of the whole vehicle, is applicable to HEV models and PHEV models, and has good platformization. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a structural schematic diagram of the hybrid power coupling system provided by the embodiment of the present invention;

[0053] Figure 2 is Figure 1 the power transmission route diagram of the hybrid power coupling system shown in the first engine direct drive mode;

[0054] Figure 3 is Figure 1 the power transmission route diagram of the hybrid power coupling system shown in the second engine direct drive mode;

[0055] Figure 4 is Figure 1 the power transmission route diagram of the hybrid power coupling system shown in the third engine direct drive mode;

[0056] Figure 5 is Figure 1Power transmission route diagram of the shown hybrid coupling system in the first hybrid drive mode;

[0057] Figure 6 is Figure 1 Power transmission route diagram of the shown hybrid coupling system in the second hybrid drive mode;

[0058] Figure 7 is Figure 1 Power transmission route diagram of the shown hybrid coupling system in the third hybrid drive mode;

[0059] Figure 8 is Figure 1 Power transmission route diagram of the shown hybrid coupling system in the first dual-motor pure electric mode;

[0060] Figure 9 is Figure 1 Power transmission route diagram of the shown hybrid coupling system in the second dual-motor pure electric mode;

[0061] Figure 10 is Figure 1 Power transmission route diagram of the shown hybrid coupling system in the third dual-motor pure electric mode;

[0062] Figure 11 is Figure 1 Power transmission route diagram of the shown hybrid coupling system in the single-motor pure electric mode;

[0063] Figure 12 is Figure 1 Power transmission route diagram of the shown hybrid coupling system in the series extended-range mode;

[0064] The reference signs in the specification are as follows:

[0065] 1. Engine; 2. Generator; 3. Drive motor;

[0066] 4. First planetary gear mechanism; 41. First sun gear; 42. First planet carrier; 43. First planet gear; 44. First ring gear;

[0067] 5. Second planetary gear mechanism; 51. Second sun gear; 52. Second planet carrier; 53. Second planet gear; 54. Second ring gear;

[0068] 6. First clutch; 7. First brake; 8. Second clutch; 9. Second brake;

[0069] 10. Input shaft; 11. Intermediate shaft;

[0070] 12. Connecting frame;

[0071] 13. First gear; 14. Second gear;

[0072] 15. Speed increasing gear pair; 151. Third gear; 152. Fourth gear;

[0073] 16. Main reduction gear pair; 161. Fifth gear; 162. Sixth gear;

[0074] 17. Differential; 18. Wheel. Detailed implementation manner

[0075] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0076] As Figure 1 shown, the hybrid power coupling system provided by the embodiment of the present invention includes an engine 1, a generator 2, a drive motor 3, a first brake 7, a second brake 9, a second clutch 8, an input shaft 10 and an intermediate shaft 11, a first planetary gear mechanism 4, a second planetary gear mechanism 5. The first planetary gear mechanism 4 includes a first sun gear 41, a first planetary carrier 42, a first planetary gear 43 and a first ring gear 44. The second planetary gear mechanism 5 includes a second sun gear 51, a second planetary carrier 52, a second planetary gear 53 and a second ring gear 54;

[0077] The engine 1 is connected to the input shaft 10;

[0078] The generator 2 is connected to the input shaft 10;

[0079] The first sun gear 41 is fixedly arranged on the input shaft 10, the second sun gear 51 is connected to the first ring gear 44, and the second planetary carrier 52 is connected to the first planetary carrier 42;

[0080] The first brake 7 is used to brake the first planetary carrier 42 and the second planetary carrier 52, the second brake 9 is used to brake the first ring gear 44, and the first ring gear 44 is connected to the input shaft 10 through the second clutch 8;

[0081] The second ring gear 54 outputs power to the intermediate shaft 11;

[0082] The drive motor 3 is connected to the intermediate shaft 11;

[0083] The intermediate shaft 11 outputs power to the wheel 18. For the convenience of subsequent description, in this application, the composite planetary gear mechanism refers to the overall structure formed by connecting the first planetary gear mechanism 4 and the second planetary gear mechanism 5.

[0084] During operation, the first brake 7 is disengaged, the second clutch 8 is disengaged, and the second brake 9 is engaged. The power of the engine 1 is transmitted to the input shaft 10, then input from the first sun gear 41 of the first planetary gear mechanism 4, output from the first planet carrier 42, then input from the second planet carrier 52 of the second planetary gear mechanism 5, and output from the second ring gear 54; or the first brake 7 is engaged, the second clutch 8 is disengaged, and the second brake 9 is disengaged. The power of the engine 1 is transmitted to the input shaft 10, then input from the first sun gear 41 of the first planetary gear mechanism 4, output from the first ring gear 44, then input from the second sun gear 51 of the second planetary gear mechanism 5, and output from the second ring gear 54; or when the first brake 7 is disengaged, the second clutch 8 is engaged, and the second brake 9 is disengaged, the first sun gear 41 and the first ring gear 44 are locked to the input shaft 10, and the second sun gear 51 and the second planet carrier 52 are locked to the input shaft 10. The speed ratio of the entire compound planetary gear mechanism is 1. The power of the engine 1 is transmitted to the input shaft 10, and then the power is output by the overall rotation of the compound planetary gear mechanism; the power of the engine 1 is transmitted to the intermediate shaft 11 through any one of the above three paths, and then the power is output from the intermediate shaft 11 to the wheel 18, thereby realizing three gears for the engine 1 to directly drive the wheel 18;

[0085] The first brake 7 is disengaged, the second clutch 8 is disengaged, and the second brake 9 is engaged. The power of the generator 2 is transmitted to the input shaft 10, then input from the first sun gear 41 of the first planetary gear mechanism 4, output from the first planet carrier 42, then input from the second planet carrier 52 of the second planetary gear mechanism 5, and output from the second ring gear 54; or the first brake 7 is engaged, the second clutch 8 is disengaged, and the second brake 9 is disengaged. The power of the generator 2 is transmitted to the input shaft 10, then input from the first sun gear 41 of the first planetary gear mechanism 4, output from the first ring gear 44, then input from the second sun gear 51 of the second planetary gear mechanism 5, and output from the second ring gear 54; or when the first brake 7 is disengaged, the second clutch 8 is engaged, and the second brake 9 is disengaged, the first sun gear 41 and the first ring gear 44 are locked to the input shaft 10, and the second sun gear 51 and the second planet carrier 52 are locked to the input shaft 10. The speed ratio of the entire compound planetary gear mechanism is 1. The power of the generator 2 is transmitted to the input shaft 10, and then the power is output by the overall rotation of the compound planetary gear mechanism; the power of the generator 2 is transmitted to the intermediate shaft 11 through any one of the above three paths, and then the power is output from the intermediate shaft 11 to the wheel 18, thereby realizing three gears for the generator 2 to drive the wheel 18;

[0086] The power of the drive motor 3 can be output to the wheel 18 through the intermediate shaft 11, thereby realizing that the drive motor 3 directly drives the wheel 18;

[0087] The power of the engine 1 can be transmitted to the input shaft 10, and the power of the input shaft 10 can be transmitted to the generator 2, thereby driving the generator 2 to generate electricity;

[0088] When the engine 1 or the generator 2 and the drive motor 3 participate in driving together, the intermediate shaft 11 plays a role in coupling power and transmits the coupled power to the wheel 18;

[0089] When the engine 1 and the generator 2 participate in driving together, the input shaft 10 plays a role in coupling power and transmits the coupled power to the wheel 18.

[0090] The hybrid power coupling system provided by the embodiment of the present invention is provided with a compound planetary gear mechanism composed of a first planetary gear mechanism 4 and a second planetary gear mechanism 5. By controlling the working states (engagement or separation) of the first brake 7, the second clutch 8 and the second brake 9, the three-speed ratio switching of the compound planetary gear mechanism can be realized, so that when the engine 1 or the generator 2 drives the wheel 18, there are three gears. The engine 1 can also drive the generator 2 to generate electricity and can also drive the wheel 18 through the drive motor 3, and can realize a variety of driving modes, significantly improving the power performance of the whole vehicle and improving the vehicle economy; the engine 1 and the generator 2 share a transmission component (compound planetary gear mechanism), which has a simple and compact structure, reduces the number of parts, is beneficial to reducing the system load, improving the power performance of the whole vehicle, is beneficial to reducing the volume, and reduces the cost of the reduction component;

[0091] In the hybrid drive mode, the dual-motor pure electric mode, the single-motor pure electric mode and the series extended-range mode, the drive motor 3 participates in driving to avoid power interruption.

[0092] The hybrid power coupling system effectively supplements the driving power required by the wheel 18 through the power battery, thereby more reasonably allocating the power of the internal combustion engine and keeping the working state of the internal combustion engine unaffected or less affected by road conditions. The internal combustion engine can always work in the set optimal state to improve the fuel efficiency of the whole vehicle, is applicable to HEV models and PHEV models, and has good platformization.

[0093] Among them, the generator 2 is an electric / generator (M / G) and can be used for generating electricity and driving.

[0094] Specifically, the generator 2 also serves as a starting motor for starting the engine 1. If the generator 2 does not drive or generate electricity and the engine 1 drives, the generator 2 stops working after starting the engine 1; if the generator 2 drives or generates electricity and the engine 1 drives, the generator 2 remains in the working state after starting the engine 1.

[0095] In one embodiment, as Figure 1As shown, it further includes a first clutch 6. The output shaft of the engine 1 is connected to the input shaft 10 through the first clutch 6. By controlling the on / off of the first clutch 6, the control of whether the engine 1 participates in driving is achieved; when it is necessary for the engine 1 to drive the wheels 18 or drive the generator 2 to generate electricity, the first clutch 6 can be engaged. When the engine 1 does not need to work, the first clutch 6 is disengaged to reduce the system load and protect the engine 1.

[0096] In one embodiment, as Figure 1 shown, the compound planetary gear mechanism includes a double planetary carrier rotatably sleeved on the input shaft 10. The double planetary carrier includes a connecting frame 12, a first planetary carrier 42 and a second planetary carrier 52. The connecting frame 12 meshes with the first brake 7, and the first planetary carrier 42 and the second planetary carrier 52 are fixed to the connecting frame 12. The structure is simple and compact, simplifies the braking settings of the first brake 7 with the first planetary carrier 42 and the second planetary carrier 52, and ensures the reliability of the transmission.

[0097] Preferably, the connecting frame 12 is rotatably sleeved on the input shaft 10, which is beneficial to improving the structural stability and transmission smoothness of the compound planetary gear mechanism.

[0098] Preferably, the second sun gear 51 is rotatably sleeved on the connecting frame 12, which is beneficial to improving the structural stability and transmission smoothness of the compound planetary gear mechanism.

[0099] Preferably, the second sun gear 51 and the first ring gear 44 are of an integral structure, which simplifies the structure and increases the structural stability.

[0100] In one embodiment, as Figure 1 shown, the engine 1 is connected to one end of the input shaft 10, the generator 2 is connected to the other end of the input shaft 10, the second clutch 8 is located on the side of the first planetary gear mechanism 4 adjacent to the generator 2, the first planetary carrier 42 is located on the side of the first planetary gear mechanism 4 away from the generator 2, and the second planetary carrier 52 is located on the side of the second planetary gear mechanism 5 away from the generator 2. The structure is simpler and more compact, which is beneficial to reducing the system load and increasing the transmission smoothness of the compound planetary gear mechanism.

[0101] In one embodiment, as Figure 1 shown, it further includes a first gear 13 fixed on the intermediate shaft 11. The second ring gear 54 meshes with the first gear 13, and the power transmission between the second ring gear 54 and the intermediate shaft 11 is achieved through the first gear 13.

[0102] Preferably, the rotational speed of the second ring gear 54 is greater than that of the first gear 13, which is equivalent to that the second ring gear 54 and the first gear 13 form a first-stage reduction gear pair to achieve the reduction output of the engine or the generator 2.

[0103] In one embodiment, asFigure 1 As shown, it further includes a second gear 14 fixedly arranged on the rotating shaft of the driving motor 3. The second gear 14 meshes with the first gear 13, and can transmit the power of the driving motor 3 to the intermediate shaft 11 through a gear pair (the second gear 14 and the first gear 13).

[0104] Preferably, the rotational speed of the second gear 14 is greater than that of the first gear 13. It is equivalent that the second gear 14 and the first gear 13 form a first-stage reduction gear pair, realizing the reduction output of the driving motor 3. And the reduction component of the driving motor 3 shares the first gear 13 with the reduction components of the engine 1 or the generator 2, simplifying the structure. When at least one of the engine 1 and the generator 2 drives together with the driving motor 3, the first gear 13 also plays a role in coupling power.

[0105] In one embodiment, as Figure 1 shown, the input shaft 10 is connected to the generator 2 through a speed increasing gear pair 15. From the input shaft 10 to the generator 2, after passing through a stage of gears (the speed increasing gear pair 15) for speed increasing and torque reduction, the volume of the generator 2 can be effectively reduced. When the generator 2 participates in driving, from the generator 2 to the input shaft 10, speed reduction and torque increase are realized through the speed increasing gear pair 15.

[0106] The speed increasing gear pair 15 includes a third gear 151 arranged on the input shaft 10 and a fourth gear 152 arranged on the rotating shaft of the generator 2. The third gear 151 meshes with the fourth gear 152. The structure is simple and compact, which is beneficial to reducing the system load and ensuring the smoothness of transmission.

[0107] In addition, as Figure 1 shown, the hybrid power coupling system further includes a differential 17. The intermediate shaft 11 is connected to the differential 17, and the differential 17 drives the wheels 18.

[0108] Preferably, as Figure 1 shown, the hybrid power coupling system further includes a main reduction gear pair 16. The intermediate shaft 11 is connected to the differential 17 through the main reduction gear pair 16 for speed reduction. The power provided by the engine 1, the generator 2, and the driving motor 3 is transmitted to the differential 17 after multiple stages of reduction (for the engine 1 and the generator 2: the second gear ring 54 and the first gear 13, and the main reduction gear pair 16; for the driving motor 3: the second gear 14 and the first gear 13, and the main reduction gear pair 16), realizing better power matching.

[0109] More preferably, as Figure 1 shown, the main reduction gear pair 16 includes a fifth gear 161 and a sixth gear 162 that mesh with each other. The fifth gear 161 is fixedly arranged on the intermediate shaft 11, and the sixth gear 162 is connected to the differential 17, which is beneficial to simplifying the structure and reducing the system load.

[0110] The following describes a preferred embodiment of the control related to brakes (generally referring to the first brake 7 and the second brake 9) and clutches (generally referring to the first clutch 6 and the second clutch 8):

[0111] When the first clutch 6 is provided, the hybrid power coupling system has five working modes: engine direct drive mode (with three gears: the first engine direct drive mode, the second engine direct drive mode, and the third engine direct drive mode), hybrid drive mode (with three gears: the first hybrid drive mode, the second hybrid drive mode, and the third hybrid drive mode), dual-motor pure electric drive mode (with three gears: the first dual-motor pure electric mode, the second dual-motor pure electric mode, and the third dual-motor pure electric mode), single-motor pure electric mode, and series extended range mode;

[0112] Among them, the above five working modes are reflected in Table 1.

[0113] Table 1

[0114]

[0115] For each of the following modes, combined with Figures 2 to 12 the power transmission route of the hybrid power coupling system is described;

[0116] (1) The first engine direct drive mode

[0117] Combined with the first clutch 6, the first brake 7 is disengaged, the second clutch 8 is disengaged, the second brake 9 is engaged, the engine 1 drives, and the generator 2 and the drive motor 3 do not work to establish the first engine direct drive mode;

[0118] Specifically, as Figure 2 shown, the power transmission route in this drive mode is: engine 1 -> first clutch 6 -> input shaft 10 -> first sun gear 41 -> first planet carrier 42 -> second planet carrier 52 -> second ring gear 54 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18.

[0119] When the vehicle speed requirement is medium or low speed, the hybrid power coupling system can enter the first engine direct drive mode.

[0120] (2) The second engine direct drive mode

[0121] Combined with the first clutch 6, the first brake 7 is engaged, the second clutch 8 is disengaged, the second brake 9 is disengaged, the engine 1 drives, and the generator 2 and the drive motor 3 do not work to establish the second engine direct drive mode;

[0122] Specifically, as Figure 3As shown, the power transmission route in this driving mode is: engine 1 -> first clutch 6 -> input shaft 10 -> first sun gear 41 -> first ring gear 44 -> second sun gear 51 -> second ring gear 54 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18.

[0123] When the vehicle speed requirement is medium speed, the hybrid power coupling system can enter the second engine direct drive mode.

[0124] (3)Third engine direct drive mode

[0125] Engage the first clutch 6, disengage the first brake 7, engage the second clutch 8, disengage the second brake 9, drive the engine 1, and the generator 2 and the drive motor 3 do not work to establish the third engine direct drive mode;

[0126] Specifically, as Figure 4 shown, the power transmission route in this driving mode is: engine 1 -> first clutch 6 -> input shaft 10 -> compound planetary gear mechanism -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18.

[0127] When the vehicle speed requirement is medium-high speed, the hybrid power coupling system can enter the third engine direct drive mode.

[0128] (4)First hybrid drive mode

[0129] Engage the first clutch 6, disengage the first brake 7, disengage the second clutch 8, engage the second brake 9, drive the engine 1, drive the generator 2 or generate electricity under the drive of the engine 1, and drive the drive motor 3 to establish the first hybrid drive mode;

[0130] Specifically, as Figure 5 shown, the power transmission route 1 in this driving mode is: engine 1 -> first clutch 6 -> input shaft 10 -> first sun gear 41 -> first planet carrier 42 -> second planet carrier 52 -> second ring gear 54 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18,

[0131] the power transmission route 2 is: generator 2 -> speed increasing gear pair 15 -> input shaft 10 -> first sun gear 41 -> first planet carrier 42 -> second planet carrier 52 -> second ring gear 54 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18,

[0132] the power transmission route 3 is: engine 1 -> first clutch 6 -> input shaft 10 -> speed increasing gear pair 15 -> generator 2,

[0133] The power transmission route 4 is: drive motor 3 -> second gear 14 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheels 18.

[0134] When the vehicle speed requirement is medium or low speed, the hybrid power coupling system can enter the first hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheels 18. At the same time, when the power battery has sufficient power, the generator 2 can be used to drive the wheels 18, and when the power battery has insufficient power, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

[0135] (5)Second hybrid drive mode

[0136] Engage the first clutch 6, engage the first brake 7, disengage the second clutch 8, disengage the second brake 9, drive the engine 1, drive the generator 2 or generate electricity under the drive of the engine 1, and drive the drive motor 3 to establish the second hybrid drive mode;

[0137] Specifically, as Figure 6 shown, the power transmission route 1 in this drive mode is: engine 1 -> first clutch 6 -> input shaft 10 -> first sun gear 41 -> first ring gear 44 -> second sun gear 51 -> second ring gear 54 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheels 18,

[0138] The power transmission route 2 is: generator 2 -> speed increasing gear pair 15 -> input shaft 10 -> first sun gear 41 -> first ring gear 44 -> second sun gear 51 -> second ring gear 54 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheels 18,

[0139] The power transmission route 3 is: engine 1 -> first clutch 6 -> input shaft 10 -> speed increasing gear pair 15 -> generator 2,

[0140] The power transmission route 4 is: drive motor 3 -> second gear 14 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheels 18.

[0141] When the vehicle speed requirement is medium speed, the hybrid power coupling system can enter the second hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheels 18. At the same time, when the power battery has sufficient power, the generator 2 can be used to drive the wheels 18, and when the power battery has insufficient power, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

[0142] (6)Third hybrid drive mode

[0143] Engage the first clutch 6, disengage the first brake 7, engage the second clutch 8, disengage the second brake 9, drive the engine 1, drive the generator 2 or generate electricity under the drive of the engine 1, and drive the drive motor 3 to establish the third hybrid drive mode;

[0144] Specifically, as Figure 7 shown, the power transmission route 1 in this drive mode is: engine 1 -> first clutch 6 -> input shaft 10 -> compound planetary gear mechanism -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18,

[0145] the power transmission route 2 is: generator 2 -> speed increasing gear pair 15 -> input shaft 10 -> compound planetary gear mechanism -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18,

[0146] the power transmission route 3 is: engine 1 -> first clutch 6 -> input shaft 10 -> speed increasing gear pair 15 -> generator 2,

[0147] the power transmission route 4 is: drive motor 3 -> second gear 14 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18.

[0148] When the vehicle speed requirement is medium to high speed, the hybrid power coupling system can enter the third hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheel 18. At the same time, when the power battery has sufficient power, the generator 2 can be used to drive the wheel 18, and when the power battery has insufficient power, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

[0149] (7) First dual-motor pure electric drive mode

[0150] Disengage the first clutch 6, disengage the first brake 7, disengage the second clutch 8, engage the second brake 9, the engine 1 does not work, and the generator 2 and the drive motor 3 jointly drive to establish the first dual-motor pure electric mode;

[0151] Specifically, as Figure 8 shown, the power transmission route 1 in this drive mode is: generator 2 -> speed increasing gear pair 15 -> input shaft 10 -> first sun gear 41 -> first planet carrier 42 -> second planet carrier 52 -> second ring gear 54 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18,

[0152] the power transmission route 2 is: drive motor 3 -> second gear 14 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18.

[0153] When the power battery has sufficient power, the hybrid coupling system can enter the first dual-motor pure electric drive mode, which is suitable for medium and low vehicle speeds.

[0154] (8) Second dual-motor pure electric drive mode

[0155] Disengage the first clutch 6, engage the first brake 7, disengage the second clutch 8, disengage the second brake 9, the engine 1 does not work, and the generator 2 and the drive motor 3 drive together to establish the second dual-motor pure electric mode;

[0156] Specifically, as Figure 9 shown, the power transmission route 1 in this drive mode is: generator 2 -> speed increasing gear pair 15 -> input shaft 10 -> first sun gear 41 -> first ring gear 44 -> second sun gear 51 -> second ring gear 54 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18,

[0157] The power transmission route 2 is: drive motor 3 -> second gear 14 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18.

[0158] When the power battery has sufficient power, the hybrid coupling system can enter the second dual-motor pure electric drive mode, which is suitable for medium vehicle speeds.

[0159] (9) Third dual-motor pure electric drive mode

[0160] Disengage the first clutch 6, disengage the first brake 7, engage the second clutch 8, disengage the second brake 9, the engine 1 does not work, and the generator 2 and the drive motor 3 drive together to establish the third dual-motor pure electric mode;

[0161] Specifically, as Figure 10 shown, the power transmission route 1 in this drive mode is: generator 2 -> speed increasing gear pair 15 -> input shaft 10 -> compound planetary gear mechanism -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18,

[0162] The power transmission route 2 is: drive motor 3 -> second gear 14 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheel 18.

[0163] When the power battery has sufficient power, the hybrid coupling system can enter the third dual-motor pure electric drive mode, which is suitable for medium and high vehicle speeds.

[0164] (10) Single-motor pure electric mode

[0165] Disengage the first clutch 6, disengage the first brake 7, disengage the second clutch 8, disengage the second brake 9, the engine 1 and the generator 2 do not operate, and the drive motor 3 drives to establish a single-motor pure electric mode;

[0166] Specifically, as Figure 11 shown, the power transmission route in this drive mode is: drive motor 3 -> second gear 14 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheels 18.

[0167] When the power battery has sufficient power, the hybrid coupling system can enter the single-motor pure electric mode, which is suitable for medium and low vehicle speeds.

[0168] (11) Series extended-range mode

[0169] Engage the first clutch 6, disengage the first brake 7, disengage the second clutch 8, disengage the second brake 9, the engine 1 drives the generator 2 to generate electricity, and the drive motor 3 drives to establish a series extended-range mode;

[0170] Specifically, as Figure 12 shown, the power transmission route 1 in this drive mode is: engine 1 -> first clutch 6 -> input shaft 10 -> speed increasing gear pair 15 -> generator 2,

[0171] Power transmission route 2 is: drive motor 3 -> second gear 14 -> first gear 13, intermediate shaft 11 -> main reducer -> differential 17 -> wheels 18.

[0172] When the power battery has insufficient power, the hybrid coupling system can enter the series extended-range mode, which is suitable for medium and low vehicle speeds.

[0173] (12) Parked power generation mode

[0174] Disengage the first clutch 6, disengage the first brake 7, disengage the second clutch 8, disengage the second brake 9, the engine 1 and the generator 2 do not operate, the drive motor 3 generates a braking torque and an induced current is generated in its winding to charge the power battery to establish a parked power generation mode;

[0175] When the vehicle brakes, the hybrid coupling system can enter the parked power generation mode. The drive motor 3 generates a braking torque to brake the wheels 18, and at the same time, an induced current will be generated in the winding of the drive motor 3 to charge the power battery, realizing the recovery of braking energy.

[0176] In addition, if the setting of the first clutch 6 is cancelled, it is only necessary to cancel the control of the first clutch 6, and the power routes of each working mode do not have to pass through the first clutch 6 accordingly. To avoid repetition, the control of the brakes and clutches and the power routes in each working mode of this solution are not listed one by one here.

[0177] An embodiment of the present invention further provides a vehicle, which includes a controller and a power battery connected to the controller, and further includes the hybrid power coupling system described in any of the foregoing embodiments. The engine 1, the generator 2, and the drive motor 3 are connected to the controller and are controlled by the controller.

[0178] By adopting the foregoing hybrid power coupling system, the engine 1 can drive the generator 2 to generate power for the power battery. The power battery can provide power for driving the wheels 18 for the generator 2 and the drive motor 3. The engine 1 can directly drive the wheels 18. By switching the working states of the first brake 7, the second brake 9, and the second clutch 8, the gear for driving the wheels 18 by the engine 1 or the generator 2 can be controlled, so as to realize multiple driving modes and obtain higher transmission efficiency. In the direct engine drive mode, the energy conversion between the engine and the motor and between the motor and the engine is avoided, and the transmission efficiency is improved. Since the dual-motor pure electric mode is realized, the dynamic performance of the whole vehicle can be further improved, and the production cost of the whole vehicle can be reduced. The engine 1 and the generator 2 share a reduction component, which has a simple and compact structure, reduces the number of parts, is beneficial to reducing the load, and thus can further improve the dynamic performance of the whole vehicle and reduce the production cost of the whole vehicle. In the hybrid drive mode, the dual-motor pure electric mode, the single-motor pure electric mode, and the series extended range mode, the drive motor 3 is involved in driving, avoiding power interruption. By effectively supplementing the driving power required by the wheels 18 through the power battery, the power of the internal combustion engine can be more reasonably allocated, and the working state of the internal combustion engine is kept from being affected by the road conditions or being less affected by the road conditions. The internal combustion engine can always work in the set optimal state to improve the fuel efficiency of the whole vehicle, and is applicable to HEV models and PHEV models, with good platformization.

[0179] In one embodiment, the five driving modes (direct engine drive mode, hybrid drive mode, dual-motor pure electric drive mode, single-motor pure electric mode, and series extended range mode) of the hybrid power coupling system can be automatically switched according to the battery SOC value and the vehicle speed requirement. The control process for automatically switching the five driving modes includes the following steps:

[0180] S1. The controller judges the size relationship between the battery SOC value and the first threshold, or simultaneously judges the size relationship between the battery SOC value and the first threshold and the size relationship between the vehicle speed and the second threshold;

[0181] S2. The controller switches the working mode of the hybrid power coupling system according to the judgment result of step S1;

[0182] S3. During braking, the controller controls the drive motor 3 to generate a braking torque and generate an induced current in its winding to charge the power battery.

[0183] Among them, the first threshold is used to judge the high or low value of the battery SOC, and the second threshold is used to judge the high or low vehicle speed. In this embodiment, the value ranges of the first threshold and the second threshold are not limited and can usually be freely set according to specific control strategies. Under different control strategies, the values of the first threshold and the second threshold are different. After setting the first threshold and the second threshold in the controller, the controller automatically makes the judgment in step S1 and automatically switches among the five driving modes according to the judgment result of step S1.

[0184] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hybrid power coupling system, comprising an engine, a generator, a drive motor, a first planetary gear mechanism, a second planetary gear mechanism, a first brake, a second brake and a second clutch. The first planetary gear mechanism includes a first sun gear, a first planet carrier, a first planet gear and a first ring gear. The second planetary gear mechanism includes a second sun gear, a second planet carrier, a second planet gear and a second ring gear, characterized in that, It further includes an input shaft and an intermediate shaft; The engine is connected to the input shaft; The generator is connected to the input shaft; The first sun gear is fixedly arranged on the input shaft, the second sun gear is connected to the first ring gear, and the second planet carrier is connected to the first planet carrier; The first brake is used to brake the first planet carrier and the second planet carrier, the second brake is used to brake the first ring gear, and the first ring gear is connected to the input shaft through the second clutch; The second ring gear outputs power to the intermediate shaft; The drive motor is connected to the intermediate shaft; The intermediate shaft outputs power to the wheels; The hybrid power coupling system further includes a differential, the intermediate shaft is connected to the differential, and the differential drives the wheels.

2. The hybrid coupling system according to claim 1, characterized in that, It further includes a double planet carrier rotatably sleeved on the input shaft. The double planet carrier includes a connecting frame, the first planet carrier and the second planet carrier. The connecting frame meshes with the first brake, and the first planet carrier and the second planet carrier are fixedly arranged on the connecting frame.

3. The hybrid coupling system according to claim 2, wherein The second sun gear is rotatably sleeved on the connecting frame.

4. The hybrid coupling system according to claim 1, wherein The engine is connected to one end of the input shaft, the generator is connected to the other end of the input shaft. The second clutch is located on the side of the first planetary gear mechanism adjacent to the generator, the first planet carrier is located on the side of the first planetary gear mechanism away from the generator, and the second planet carrier is located on the side of the second planetary gear mechanism away from the generator.

5. The hybrid coupling system according to claim 1, wherein The second sun gear and the first ring gear are of an integral structure.

6. The hybrid coupling system according to claim 1, wherein It further includes a first gear fixedly arranged on the intermediate shaft and a second gear fixedly arranged on the rotating shaft of the drive motor. The second ring gear meshes with the first gear, and the second gear meshes with the first gear. The rotational speed of the second gear is greater than that of the first gear; The hybrid power coupling system further includes a speed increasing gear pair, and the input shaft is connected to the generator through the speed increasing gear pair.

7. The hybrid coupling system according to any one of claims 1-6, characterized in that, It further includes a first clutch, and the rotating shaft of the engine is connected to the input shaft through the first clutch.

8. The hybrid coupling system according to any one of claims 1-6, characterized in that, The hybrid power coupling system has a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, a first hybrid drive mode, a second hybrid drive mode, a third hybrid drive mode, a first dual-motor pure electric mode, a second dual-motor pure electric mode, a third dual-motor pure electric mode, a single-motor pure electric mode, and a series extended range mode; Disengage the first brake, disengage the second clutch, engage the second brake, the engine drives, and the generator and the drive motor do not work to establish the first engine direct drive mode; Engage the first brake, disengage the second clutch, disengage the second brake, the engine drives, and the generator and the drive motor do not work to establish the second engine direct drive mode; Disengage the first brake, engage the second clutch, disengage the second brake, the engine drives, and the generator and the drive motor do not work to establish the third engine direct drive mode; Disengage the first brake, disengage the second clutch, engage the second brake, drive the engine, drive the generator or generate electricity under the drive of the engine, drive the drive motor to establish the first hybrid drive mode; Engage the first brake, disengage the second clutch, disengage the second brake, drive the engine, drive the generator or generate electricity under the drive of the engine, drive the drive motor to establish the second hybrid drive mode; Disengage the first brake, engage the second clutch, disengage the second brake, drive the engine, drive the generator or generate electricity under the drive of the engine, drive the drive motor to establish the third hybrid drive mode; Disengage the first brake, disengage the second clutch, engage the second brake, the engine does not work, the generator and the drive motor drive together to establish the first dual-motor pure electric mode; Engage the first brake, disengage the second clutch, disengage the second brake, the engine does not work, the generator and the drive motor drive together to establish the second dual-motor pure electric mode; Disengage the first brake, engage the second clutch, disengage the second brake, the engine does not work, the generator and the drive motor drive together to establish the third dual-motor pure electric mode; Disengage the first brake, disengage the second clutch, disengage the second brake, the engine and the generator do not work, the drive motor drives to establish the single-motor pure electric mode; Disengage the first brake, disengage the second clutch, disengage the second brake, the engine drives the generator to generate electricity, the drive motor drives to establish the series extended-range mode; 9. The hybrid coupling system according to claim 7, wherein The hybrid coupling system has a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, a first hybrid drive mode, a second hybrid drive mode, a third hybrid drive mode, a first dual-motor pure electric mode, a second dual-motor pure electric mode, a third dual-motor pure electric mode, a single-motor pure electric mode and a series extended-range mode; Engage the first clutch, disengage the first brake, disengage the second clutch, engage the second brake, the engine drives, the generator and the drive motor do not work to establish the first engine direct drive mode; Engage the first clutch, engage the first brake, disengage the second clutch, disengage the second brake, the engine drives, the generator and the drive motor do not work to establish the second engine direct drive mode; Engage the first clutch, disengage the first brake, engage the second clutch, disengage the second brake, the engine drives, the generator and the drive motor do not work to establish the third engine direct drive mode; In combination with the first clutch, disengage the first brake, disengage the second clutch, engage the second brake, drive the engine, drive the generator or generate electricity under the drive of the engine, and drive the drive motor to establish the first hybrid drive mode; In combination with the first clutch, engage the first brake, disengage the second clutch, disengage the second brake, drive the engine, drive the generator or generate electricity under the drive of the engine, and drive the drive motor to establish the second hybrid drive mode; In combination with the first clutch, disengage the first brake, engage the second clutch, disengage the second brake, drive the engine, drive the generator or generate electricity under the drive of the engine, and drive the drive motor to establish the third hybrid drive mode; Disengage the first clutch, disengage the first brake, disengage the second clutch, engage the second brake, the engine does not work, and the generator and the drive motor drive together to establish the first dual-motor pure electric mode; Disengage the first clutch, engage the first brake, disengage the second clutch, disengage the second brake, the engine does not work, and the generator and the drive motor drive together to establish the second dual-motor pure electric mode; Disengage the first clutch, disengage the first brake, engage the second clutch, disengage the second brake, the engine does not work, and the generator and the drive motor drive together to establish the third dual-motor pure electric mode; Disengage the first clutch, disengage the first brake, disengage the second clutch, disengage the second brake, the engine and the generator do not work, and the drive motor drives to establish the single-motor pure electric mode; In combination with the first clutch, disengage the first brake, disengage the second clutch, disengage the second brake, the engine drives the generator to generate electricity, and the drive motor drives to establish the series extended-range mode.

10. A vehicle, comprising a controller and a battery connected to the controller, characterized in that, It further includes the hybrid power coupling system according to any one of claims 1-9, wherein the engine, the generator and the drive motor are connected to the controller and controlled by the controller.

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