Hybrid power system and vehicle

Abstract

The invention provides a hybrid power system and a vehicle. The hybrid power system comprises an engine, a first motor, a second motor, a planetary gear train, a speed reducing mechanism, a first clutch, a second clutch and an output shaft. The planetary gear train comprises a sun gear, a planet gear, a planet carrier and a gear ring, the planet gear is located on the periphery of the sun gear and meshed with the sun gear, the planet gear is installed on the planet carrier, the gear ring surrounds the periphery of the planet gear and is used for restraining the rotating path of the planet gear, and the first clutch is fixed to a box body of the hybrid power system and connected with the gear ring; the second clutch is connected with a driving shaft of the engine and a driving shaft of the first motor, the first motor is in transmission connection with the planet carrier, the second motor is in transmission connection with the sun gear, the speed reducing mechanism is in transmission connection with the sun gear and the output shaft, and the output shaft is used for being connected with wheels. Through the arrangement, the working modes of the hybrid power system are greatly enriched.

Description

Technical Field

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

[0002] As a means of transportation with high speed and efficiency in daily life, the number of vehicles has been increasing year by year in recent years. Most traditional vehicles use fossil fuels (such as gasoline, diesel, etc.) to provide power for the engine, and the exhaust gas discharged will pollute the environment, which does not meet the requirements of energy conservation and environmental protection. Therefore, it is necessary to use pollution-free new energy (such as electric energy) to replace fossil fuels to provide power for vehicles.

[0003] At present, in the field of new energy vehicles, hybrid vehicles have gradually gained the favor of consumers due to their excellent energy conservation and emission reduction and excellent user experience. The hybrid power system is an important component in hybrid vehicles. By using the engine and the motor as power sources, the vehicle can achieve a driving mode that can use either fuel or electricity, thus combining power performance and economy.

[0004] In related technologies, the driving mode of the hybrid power system is mainly realized by the vehicle variable speed transmission system. The vehicle variable speed transmission system is mostly developed based on traditional automatic transmissions, that is, the motor is simply integrated at the front end or the rear end of transmissions such as AT, AMT, CVT, or DCT.

[0005] The structure of the hybrid power system in the above related technologies is relatively simple and can meet simple transmission requirements. However, the corresponding working mode is relatively single and difficult to adjust according to the actual working conditions of users, which affects the fuel saving rate of the vehicle. Summary of the Invention

[0006] In view of this, the present application provides a hybrid power system and a vehicle, which can enrich the working modes of the hybrid power system.

[0007] Specifically, the following technical solutions are included:

[0008] In a first aspect, the present application provides a hybrid power system, which includes an engine, a first motor, a second motor, a planetary gear train, a reduction mechanism, a first clutch, a second clutch, and an output shaft;

[0009] The planetary gear train includes a sun gear, a planetary gear, a planet carrier, and a ring gear. The planetary gear is located on the outer periphery of the sun gear and meshes with the sun gear. The planetary gear is installed on the planet carrier. The ring gear surrounds the periphery of the planetary gear and is used to constrain the rotation path of the planetary gear. The first clutch is fixed to the housing of the hybrid power system and is connected to the ring gear;

[0010] The second clutch is respectively connected to the drive shaft of the engine and the drive shaft of the first motor. The first motor is drivingly connected to the planet carrier, the second motor is drivingly connected to the sun gear, the reduction mechanism is respectively drivingly connected to the sun gear and the output shaft, and the output shaft is used to connect to the wheels.

[0011] In a possible implementation, the reduction mechanism includes a first gear, a second gear, and a third gear. The first gear meshes with the second gear, and the second gear and the third gear are coaxially connected;

[0012] The first gear is drivingly connected to the sun gear, the third gear is drivingly connected to the output shaft, and the diameter of the second gear is larger than the diameter of the first gear.

[0013] In a possible implementation, the reduction mechanism further includes a fourth gear and a fifth gear that mesh with each other. The hybrid power system further includes a third clutch and a fourth clutch;

[0014] The center line of the fourth gear and the center line of the first gear are on the same straight line. The fifth gear and the second gear are coaxially connected. The transmission ratio between the first gear and the second gear is less than the transmission ratio between the fourth gear and the fifth gear;

[0015] The third clutch is respectively connected to the second motor, the sun gear, and the fourth gear. The fourth clutch is respectively connected to the second motor, the sun gear, and the first gear.

[0016] In a possible implementation, the third clutch includes a housing, a first clutch disc, and a first pressure plate. The housing is coaxially connected to the sun gear. The first clutch disc is annular and fixed to the inner side of the housing. The first pressure plate is connected to the fourth gear. When the first clutch is engaged, the first pressure plate is connected to the first clutch disc;

[0017] The fourth clutch includes a second clutch disc and a second pressure plate. The second clutch disc is annular and fixed to the inner side of the housing. The second pressure plate is connected to the first gear. When the second clutch is engaged, the second pressure plate is connected to the second clutch disc.

[0018] In a possible implementation, the hybrid power system includes a pure electric drive mode. The pure electric drive mode includes a first gear position, a second gear position, a third gear position, and a fourth gear position;

[0019] In the first gear position, the fourth clutch is engaged, the first clutch, the second clutch, and the third clutch are all disengaged, and the second motor drives the output shaft;

[0020] In the second gear position, the third clutch is engaged, the first clutch, the second clutch, and the fourth clutch are all disengaged, and the second motor drives the output shaft;

[0021] In the third gear position, the first clutch and the fourth clutch are both engaged, the second clutch and the third clutch are both disengaged, and the first motor and the second motor drive the output shaft;

[0022] In the fourth gear position, the first clutch and the third clutch are both engaged, the second clutch and the fourth clutch are both disengaged, and the first motor and the second motor drive the output shaft.

[0023] In a possible implementation, the hybrid power system includes a first hybrid mode;

[0024] In the first hybrid mode, the second clutch and the fourth clutch are both engaged, the first clutch and the third clutch are both disengaged, the second motor drives the output shaft, and the engine drives the first motor to generate electricity.

[0025] In a possible implementation, the hybrid power system includes a second hybrid mode, and the second hybrid mode includes a fifth gear position and a sixth gear position;

[0026] In the fifth gear position, the first clutch, the second clutch, and the fourth clutch are all engaged, the third clutch is disengaged, and the engine, the first motor, and the second motor drive the output shaft;

[0027] In the sixth gear position, the first clutch, the second clutch, and the third clutch are all engaged, the fourth clutch is disengaged, and the engine, the first motor, and the second motor drive the output shaft.

[0028] In a possible implementation, the hybrid power system includes an engine direct drive mode, and the engine direct drive mode includes a seventh gear position and an eighth gear position;

[0029] In the seventh gear position, the first clutch, the second clutch, and the fourth clutch are all engaged, the third clutch is disengaged, and the engine drives the output shaft;

[0030] In the eighth gear, the first clutch, the second clutch, and the third clutch are all engaged, the fourth clutch is disengaged, and the engine drives the output shaft.

[0031] In a possible implementation, both the first motor and the second motor are disc motors, and the drive shaft of the second motor is sleeved on the outer circumference of the drive shaft of the first motor.

[0032] In a second aspect, the present application provides a vehicle, comprising a hybrid power system provided by any embodiment of the first aspect.

[0033] The beneficial effects of the technical solution provided by the embodiment of the present application include at least: by arranging the first motor and the second motor to be respectively connected to the planetary gear system, the first motor and the second motor can drive the output shaft through the planetary gear system and the reduction mechanism, and then drive the wheels; since the first clutch is connected to the ring gear, and the second clutch is respectively connected to the drive shaft of the engine and the drive shaft of the first motor, therefore, through the engagement or disengagement of the first clutch and the second clutch, the engine transmission path and the working mode can be switched, and then the power source of the hybrid power system can be switched, so that the hybrid power system can at least realize pure electric drive mode, series drive mode, engine single drive mode, etc., which greatly enriches the working mode of the hybrid power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 A schematic diagram of the structure of a hybrid power system provided in some embodiments of the present application;

[0036] Figure 2 A schematic structural diagram of a hybrid power system provided in some other embodiments of the present application;

[0037] Figure 3 A schematic diagram of a power transmission path of a hybrid system in a pure electric drive mode in accordance with some other embodiments of the present application;

[0038] Figure 4 A schematic diagram of a power transmission path of a hybrid system in the second gear of a pure electric drive mode provided in some other embodiments of the present application;

[0039] Figure 5Schematic diagram of the power transmission path of the hybrid system provided in some other embodiments of the present application in the third gear of the pure electric drive mode;

[0040] Figure 6 Schematic diagram of the power transmission path of the hybrid system provided in some other embodiments of the present application in the fourth gear of the pure electric drive mode;

[0041] Figure 7 Schematic diagram of the power transmission path of the hybrid system provided in some other embodiments of the present application in the first hybrid mode;

[0042] Figure 8 Schematic diagram of the power transmission path of the hybrid system provided in some other embodiments of the present application in the fifth gear of the second hybrid mode;

[0043] Figure 9 Schematic diagram of the power transmission path of the hybrid system provided in some other embodiments of the present application in the sixth gear of the second hybrid mode;

[0044] Figure 10 Schematic diagram of the power transmission path of the hybrid system provided in some other embodiments of the present application in the seventh gear of the engine direct drive mode;

[0045] Figure 11 Schematic diagram of the power transmission path of the hybrid system provided in some other embodiments of the present application in the eighth gear of the engine direct drive mode.

[0046] The reference numerals in the figure are respectively represented as:

[0047] 1 - Engine;

[0048] 2 - First motor;

[0049] 3 - Second motor;

[0050] 4 - Planetary gear train; 41 - Sun gear; 42 - Planet gear; 43 - Planet carrier; 44 - Ring gear;

[0051] 5 - Reduction mechanism; 51 - First gear; 52 - Second gear; 53 - Third gear; 54 - Fourth gear; 55 - Fifth gear;

[0052] 6 - First clutch;

[0053] 7 - Second clutch;

[0054] 8 - Output shaft;

[0055] 9 - Third clutch; 91 - Housing; 92 - First clutch plate; 93 - First pressure plate;

[0056] 10 - Fourth clutch; 101 - Second clutch disc; 102 - Second pressure plate;

[0057] 100 - Wheel.

[0058] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0059] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0060] The orientation terms involved in the embodiments of the present application, such as "upper", "lower", "side", etc., are generally based on the relative relationship of the orientation shown in the drawings, and the use of these orientation terms is only to more clearly describe the relationship between structures and structures, rather than to describe the absolute orientation. When the product is placed in different postures, the orientation may change. For example, "upper" and "lower" may be interchanged.

[0061] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meaning as commonly understood by those of ordinary skill in the art.

[0062] To make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the drawings.

[0063] As Figure 1 shown, the embodiments of the present application provide a hybrid power system, including an engine 1, a first motor 2, a second motor 3, a planetary gear train 4, a reduction mechanism 5, a first clutch 6, a second clutch 7, and an output shaft 8.

[0064] The planetary gear train 4 includes a sun gear 41, planetary gears 42, a planet carrier 43, and a ring gear 44. The planetary gears 42 are located on the outer periphery of the sun gear 41 and mesh with the sun gear 41. The planetary gears 42 are mounted on the planet carrier 43. The ring gear 44 surrounds the periphery of the planetary gears 42 and is used to constrain the rotation path of the planetary gears 42. The first clutch 6 is fixed to the housing of the hybrid power system and is connected to the ring gear 44.

[0065] The second clutch 7 is respectively connected to the drive shaft of the engine 1 and the drive shaft of the first motor 2. The first motor 2 is in transmission connection with the planet carrier 43, the second motor 3 is in transmission connection with the sun gear 41, and the reduction mechanism 5 is respectively in transmission connection with the sun gear 41 and the output shaft 8. The output shaft 8 is used to connect to the wheel 100.

[0066] Exemplarily, the first motor 2 and the second motor 3 are electrically connected.

[0067] The hybrid power system further includes a power battery pack, an inverter, and a transformer. The power battery pack is respectively electrically connected to the first motor 2 and the second motor 3. After the inverter and the transformer convert the direct current output by the power battery pack into three-phase alternating current, the power battery pack can supply electric energy to the first motor 2 and the second motor 3. When the first motor 2 and the second motor 3 are driven by an external force, the first motor 2 and the second motor 3 can charge the battery pack.

[0068] The planetary gear train 4 is used to adjust the transmission ratio between the engine 1 and the output shaft 8. For example, it can achieve deceleration and torque increase between the engine 1 and the output shaft 8, so that the engine 1 exerts a greater driving force on the output shaft 8, thereby driving the wheel 100 through the output shaft 8.

[0069] Specifically, the sun gear 41 is rigidly connected to the drive shaft of the second motor 3, and the planet carrier 43 is rigidly connected to the drive shaft of the first motor 2.

[0070] The reduction mechanism 5 is used to realize the transmission connection between the output shaft 8 and the engine 1, the first motor 2, and the second motor 3, so that the engine 1, the first motor 2, and the second motor 3 can transmit power to the output shaft 8, and at the same time can play a role in decelerating and increasing torque, so that the engine 1 exerts a greater driving force on the output shaft 8.

[0071] The first clutch 6 can change the state of the ring gear 44 through its own engagement or separation. When the first clutch 6 is engaged, the ring gear 44 is fixed and stationary relative to the housing of the hybrid power system; when the first clutch 6 is separated, the ring gear 44 can rotate relative to the housing of the hybrid power system.

[0072] The second clutch 7 can change the connection state between the drive shaft of the engine 1 and the drive shaft of the first motor 2 through its own engagement or separation. When the second clutch 7 is engaged, the drive shaft of the engine 1 is connected to the drive shaft of the first motor 2, and the power of the engine 1 can be transmitted to the drive shaft of the first motor 2 and the planet carrier 43; when the second clutch 7 is separated, the drive shaft of the engine 1 is separated from the drive shaft of the first motor 2, and the power of the engine 1 cannot be transmitted to the drive shaft of the first motor 2 and the planet carrier 43.

[0073] By providing the first clutch 6 and the second clutch 7 , the power transmission path between the engine 1 and the planetary gear train 4 can be changed, thereby improving the flexibility and applicability of the hybrid power system.

[0074] The hybrid power system provided in the embodiment of the present application is configured such that the first motor 2 and the second motor 3 are respectively connected to the planetary gear train 4, so that the first motor 2 and the second motor 3 can drive the output shaft 8 through the planetary gear train 4 and the reduction mechanism 5, and then drive the wheel 100; since the first clutch 6 is connected to the ring gear 44, and the second clutch 7 is respectively connected to the drive shaft of the engine 1 and the drive shaft of the first motor 2, therefore, through the engagement or disengagement of the first clutch 6 and the second clutch 7, the transmission path and working mode of the engine 1 can be switched, and then the power source of the hybrid power system can be switched, so that the hybrid power system can at least realize a pure electric drive mode, a series drive mode, an engine 1 single drive mode, etc., which greatly enriches the working mode of the hybrid power system.

[0075] In some embodiments, the speed reduction mechanism 5 includes a first gear 51 , a second gear 52 and a third gear 53 . The first gear 51 and the second gear 52 are meshed with each other, and the second gear 52 and the third gear 53 are coaxially connected.

[0076] The first gear 51 is in driving connection with the sun gear 41 , the third gear 53 is in driving connection with the output shaft 8 , and the diameter of the second gear 52 is greater than that of the first gear 51 .

[0077] Specifically, the center line of the rotation axis of the first gear 51 and the center line of the rotation axis of the sun gear 41 are located on the same straight line. Figure 1 As shown, the first gear 51 can be fixedly connected to the sun gear 41 and rotate synchronously with the sun gear 41 under the drive of the sun gear 41. Alternatively, the first gear 51 can be connected to the sun gear 41 or separated from the sun gear 41, and the connection state of the first gear 51 and the sun gear 41 can be changed according to different working conditions.

[0078] The diameter of the second gear 52 is greater than that of the first gear 51, and the number of teeth of the second gear 52 is greater than the number of teeth of the first gear 51. When the first gear 51 drives the second gear 52 to rotate, the effect of deceleration and torque increase is achieved, which helps to apply greater torque and driving force to the output shaft 8, thereby improving the power of the entire vehicle.

[0079] In some embodiments, as Figure 2 As shown, the reduction mechanism 5 further includes a fourth gear 54 and a fifth gear 55 that mesh with each other, and the hybrid system further includes a third clutch 9 and a fourth clutch 10 .

[0080] The center line of the fourth gear 54 is on the same straight line as the center line of the first gear 51. The fifth gear 55 and the second gear 52 are coaxially connected. The transmission ratio between the first gear 51 and the second gear 52 is less than the transmission ratio between the fourth gear 54 and the fifth gear 55.

[0081] The third clutch 9 is respectively drivingly connected to the second motor 3, the sun gear 41 and the fourth gear 54. The fourth clutch 10 is respectively drivingly connected to the second motor 3, the sun gear 41 and the first gear 51.

[0082] As Figure 2 shown, the third clutch 9 is fixed on the drive shaft of the second motor 3. When the third clutch 9 is engaged, the fourth gear 54 is connected to the drive shaft of the second motor 3, and the fourth gear 54 can be driven by the second motor 3 and / or the sun gear 41 to rotate.

[0083] As Figure 2 shown, the fourth clutch 10 is fixed on the drive shaft of the second motor 3. When the fourth clutch 10 is engaged, the first gear 51 is connected to the drive shaft of the second motor 3, and the first gear 51 can be driven by the second motor 3 and / or the sun gear 41 to rotate.

[0084] The second gear 52, the third gear 53 and the fifth gear 55 are coaxially connected. By changing the states of the third clutch 9 and the fourth clutch 10, the power transmission route of the speed reduction mechanism 5 can be switched. For example, one of the power transmission routes is: the first gear 51 - the second gear 52 - the third gear 53, and the other power transmission route is the fourth gear 54 - the fifth gear 55 - the third gear 53.

[0085] Since the transmission ratio between the first gear 51 and the second gear 52 is less than the transmission ratio between the fourth gear 54 and the fifth gear 55, by changing the states of the third clutch 9 and the fourth clutch 10, the power transmission route of the speed reduction mechanism 5 can be switched, thereby changing the transmission ratio of the speed reduction mechanism 5, improving the flexibility and applicability of the hybrid power system, and thus adapting to different working conditions of the vehicle.

[0086] In some embodiments, as Figure 2 shown, the third clutch 9 includes a housing 91, a first clutch disc 92 and a first pressure plate 93. The housing 91 is coaxially connected to the sun gear 41. The first clutch disc 92 is annular and fixed to the inner side of the housing 91. The first pressure plate 93 is connected to the fourth gear 54. When the first clutch 6 is engaged, the first pressure plate 93 is connected to the first clutch disc 92.

[0087] The fourth clutch 10 includes a second clutch disc 101 and a second pressure plate 102. The second clutch disc 101 is annular and fixed to the inner side of the housing 91. The second pressure plate 102 is connected to the first gear 51. When the second clutch 7 is engaged, the second pressure plate 102 is connected to the second clutch disc 101.

[0088] When the third clutch 9 is engaged, the power of the second motor 3 and / or the sun gear 41 is sequentially transmitted to the fourth gear 54 through the housing 91, the first clutch disc 92, and the first pressure plate 93.

[0089] When the fourth clutch 10 is engaged, the power of the second motor 3 and / or the sun gear 41 is sequentially transmitted to the first gear 51 through the housing 91, the second clutch disc 101, and the second pressure plate 102.

[0090] In this embodiment, the third clutch 9 and the fourth clutch 10 form a dual clutch. The third clutch 9 and the fourth clutch 10 share the same housing 91, which is beneficial to reducing the space occupied by the third clutch 9 and the fourth clutch 10.

[0091] In some embodiments, the hybrid power system includes a pure electric drive mode, and the pure electric drive mode includes a first gear, a second gear, a third gear, and a fourth gear.

[0092] In the first gear, the fourth clutch 10 is engaged, the first clutch 6, the second clutch 7, and the third clutch 9 are all disengaged, and the second motor 3 drives the output shaft 8.

[0093] In the second gear, the third clutch 9 is engaged, the first clutch 6, the second clutch 7, and the fourth clutch 10 are all disengaged, and the second motor 3 drives the output shaft 8.

[0094] In the third gear, the first clutch 6 and the fourth clutch 10 are both engaged, the second clutch 7 and the third clutch 9 are both disengaged, and the first motor 2 and the second motor 3 drive the output shaft 8.

[0095] In the fourth gear, the first clutch 6 and the third clutch 9 are both engaged, the second clutch 7 and the fourth clutch 10 are both disengaged, and the first motor 2 and the second motor 3 drive the output shaft 8.

[0096] In the pure electric drive mode, the engine 1 does not work, and the output shaft 8 is driven by the first motor 2 and / or the second motor 3 to drive the vehicle to travel. After the power battery pack converts direct current into three-phase alternating current through the inverter / transformer, it drives the first motor 2 and / or the second motor 3. The first motor 2 and / or the second motor 3 drives the output shaft 8 to rotate through the planetary gear train 4 and the reduction mechanism 5, and then drives the wheels 100 to rotate.

[0097] The pure electric drive mode is applicable to the vehicle starting stage, low-speed driving, and the condition where the vehicle battery has sufficient power. It can avoid the energy loss caused by the frequent start and stop of the engine 1, thereby improving the fuel-saving rate.

[0098] Among them, the pure electric drive mode can achieve the reverse driving condition and the energy recovery condition.

[0099] In the reverse driving condition, the first motor 2 and / or the second motor 3 rotate in reverse, causing the planetary gear train 4, the reduction mechanism 5, and the output shaft 8 to drive the wheel 100 to rotate in reverse, thereby realizing reverse driving. Since the vehicle driving speed is slow and the reverse time is short in the reverse driving condition, the engine 1 does not need to participate in driving, which can reduce the energy consumption of the vehicle.

[0100] In the energy recovery condition, the wheel 100 decelerates. The wheel 100 drives the first motor 2 and / or the second motor 3 through the output shaft 8 and the reduction mechanism 5, enabling the first motor 2 and / or the second motor 3 to convert the kinetic energy of the vehicle into electrical energy through negative torque and thus charge the power battery pack.

[0101] As Figure 3 shown, in the first gear, the fourth clutch 10 engages, the second motor 3 operates, and both the engine 1 and the first motor 2 do not operate. The power of the second motor 3 is transmitted to the first gear 51 through the fourth clutch 10, and then transmitted to the output shaft 8 through the second gear 52 and the third gear 53, driving the wheel 100 to rotate.

[0102] As Figure 4 shown, in the second gear, the third clutch 9 engages, the second motor 3 operates, and both the engine 1 and the first motor 2 do not operate. The power of the second motor 3 is transmitted to the fourth gear 54 through the third clutch 9, and then transmitted to the output shaft 8 through the fifth gear 55 and the third gear 53, driving the wheel 100 to rotate.

[0103] Both the first gear and the second gear are single-motor drive architectures. Since the transmission ratio between the first gear 51 and the second gear 52 is less than the transmission ratio between the fourth gear 54 and the fifth gear 55, therefore, when the rotational speed of the second motor 3 is constant, compared with the first gear, the reduction mechanism 5 in the second gear can output a greater rotational speed, providing a higher output power for the vehicle.

[0104] As Figure 5As shown in the figure, in the third gear position, the first clutch 6 and the fourth clutch 10 are both engaged, the first motor 2 and the second motor 3 are both operating, and the engine 1 is not operating. Since the first clutch 6 is engaged, the ring gear 44 is a fixed component. The power of the first motor 2 is sequentially transmitted to the planet carrier 43, the planet gears 42, the sun gear 41, the fourth clutch 10, and the first gear 51. At the same time, the power of the second motor 3 is sequentially transmitted to the fourth clutch 10 and the first gear 51. The power of the first motor 2 and the second motor 3 is coupled at the first gear 51, and the coupled power is further transmitted to the output shaft 8 through the second gear 52 and the third gear 53 to drive the wheel 100 to rotate.

[0105] As Figure 6 shown in the figure, in the fourth gear position, the first clutch 6 and the third clutch 9 are both engaged, the first motor 2 and the second motor 3 are both operating, and the engine 1 is not operating. Since the first clutch 6 is engaged, the ring gear 44 is a fixed component. The power of the first motor 2 is sequentially transmitted to the planet carrier 43, the planet gears 42, the sun gear 41, the third clutch 9, and the fourth gear 54. At the same time, the power of the second motor 3 is sequentially transmitted to the third clutch 9 and the fourth gear 54. The power of the first motor 2 and the second motor 3 is coupled at the fourth gear 54, and the coupled power is further transmitted to the output shaft 8 through the fifth gear 55 and the third gear 53 to drive the wheel 100 to rotate.

[0106] Both the third gear position and the fourth gear position adopt a dual-motor drive architecture. Since the transmission ratio between the first gear 51 and the second gear 52 is smaller than the transmission ratio between the fourth gear 54 and the fifth gear 55, when the rotational speeds of the first motor 2 and the second motor 3 are constant, compared with the third gear position, the reduction mechanism 5 in the fourth gear position can output a greater rotational speed, providing a higher output power for the vehicle.

[0107] In some embodiments, the hybrid power system includes a first hybrid power mode.

[0108] In the first hybrid power mode, the second clutch 7 and the fourth clutch 10 are both engaged, the first clutch 6 and the third clutch 9 are both disengaged, the second motor 3 drives the output shaft 8, and the engine 1 drives the first motor 2 to generate electricity.

[0109] In the first hybrid power mode, the hybrid power system constitutes a series drive mode. As Figure 7As shown, since the first clutch 6 is disengaged, the power of the engine 1 and the first motor 2 cannot be transmitted to the output shaft 8 through the planetary gear train 4. The power of the engine 1 is transmitted to the first motor 2 through the second clutch 7, driving the first motor 2 to generate electricity. Part of the electric energy generated by the first motor 2 is transmitted to the power battery pack for storage, and part is converted from direct current to three-phase alternating current through the inverter / transformer and then transmitted to the second motor 3 to provide electric energy for the second motor 3. The second motor 3 is mainly responsible for providing power. The power of the second motor 3 is transmitted to the first gear 51 through the fourth clutch 10, and then transmitted to the output shaft 8 through the second gear 52 and the third gear 53, driving the wheels 100 to rotate.

[0110] The first hybrid mode is applicable to the conditions of low-speed vehicle driving, urban road driving or insufficient battery endurance. The engine 1 can operate stably in the efficient range to generate electricity, avoiding high fuel consumption and high emissions under idling and low-speed conditions.

[0111] In some embodiments, the hybrid system includes a second hybrid mode, and the second hybrid mode includes a fifth gear and a sixth gear.

[0112] In the fifth gear, the first clutch 6, the second clutch 7 and the fourth clutch 10 are all engaged, and the third clutch 9 is disengaged. The engine 1, the first motor 2 and the second motor 3 drive the output shaft 8.

[0113] In the sixth gear, the first clutch 6, the second clutch 7 and the third clutch 9 are all engaged, and the fourth clutch 10 is disengaged. The engine 1, the first motor 2 and the second motor 3 drive the output shaft 8.

[0114] In the second hybrid mode, the hybrid system constitutes a parallel drive mode. The engine 1, the first motor 2 and the second motor 3 can work together to jointly drive the vehicle to travel, thereby outputting a larger power and improving the dynamic performance of the whole vehicle.

[0115] The second hybrid mode is applicable to conditions such as high-speed cruising, starting acceleration, and complex road conditions. By power superposition, it provides a higher output power for the vehicle and improves the dynamic performance of the whole vehicle.

[0116] As Figure 8 shown, in the fifth gear, the power of the engine 1 and the first motor 2 is sequentially transmitted to the planet carrier 43, the planet gear 42, the sun gear 41, the fourth clutch 10, and the first gear 51; at the same time, the power of the second motor 3 is sequentially transmitted to the fourth clutch 10 and the first gear 51. The power of the engine 1, the first motor 2 and the second motor 3 is coupled at the first gear 51, and the coupled power is further transmitted to the output shaft 8 through the second gear 52 and the third gear 53 to drive the wheels 100 to rotate.

[0117] AsFigure 9 As shown, in the sixth gear position, the power of the engine 1 and the first motor 2 is transmitted successively to the planet carrier 43, the planet gears 42, the sun gear 41, the third clutch 9, and the fourth gear 54; meanwhile, the power of the second motor 3 is transmitted successively to the third clutch 9 and the fourth gear 54. The power of the engine 1, the first motor 2, and the second motor 3 is coupled at the fourth gear 54, and the coupled power is further transmitted to the output shaft 8 through the fifth gear 55 and the third gear 53 to drive the wheels 100 to rotate.

[0118] Since the transmission ratio between the first gear 51 and the second gear 52 is smaller than the transmission ratio between the fourth gear 54 and the fifth gear 55, therefore, when the rotational speeds of the engine 1, the first motor 2, and the second motor 3 are constant, compared with the fifth gear position, the reduction mechanism 5 in the sixth gear position can output a greater rotational speed, providing higher output power for the vehicle.

[0119] In some embodiments, the hybrid power system includes an engine direct drive mode, and the engine direct drive mode includes a seventh gear position and an eighth gear position.

[0120] In the seventh gear position, the first clutch 6, the second clutch 7, and the fourth clutch 10 are all engaged, and the third clutch 9 is disengaged, and the engine 1 drives the output shaft 8.

[0121] In the eighth gear position, the first clutch 6, the second clutch 7, and the third clutch 9 are all engaged, and the fourth clutch 10 is disengaged, and the engine 1 drives the output shaft 8.

[0122] In the engine direct drive mode, the first motor 2 and the second motor 3 do not participate in driving, and the vehicle is directly driven by the engine 1, which is applicable to working conditions such as high-speed driving, low battery state, rapid acceleration, and off-road.

[0123] As Figure 10 shown, in the seventh gear position, the power of the engine 1 is transmitted successively to the planet carrier 43, the planet gears 42, the sun gear 41, the fourth clutch 10, the first gear 51, the second gear 52, and the third gear 53, and the third gear 53 further transmits the power to the output shaft 8 to drive the wheels 100 to rotate.

[0124] As Figure 11 shown, in the eighth gear position, the power of the engine 1 is transmitted successively to the planet carrier 43, the planet gears 42, the sun gear 41, the third clutch 9, the fourth gear 54, the fifth gear 55, and the third gear 53, and the third gear 53 further transmits the power to the output shaft 8 to drive the wheels 100 to rotate.

[0125] Since the transmission ratio between the first gear 51 and the second gear 52 is less than the transmission ratio between the fourth gear 54 and the fifth gear 55, therefore, when the engine 1 rotates at a constant speed, compared with the seventh gear, the reduction mechanism 5 in the eighth gear can output a greater rotational speed, providing higher output power for the vehicle.

[0126] In some embodiments, both the first motor 2 and the second motor 3 are disc motors, and the drive shaft of the second motor 3 is sleeved around the outer periphery of the drive shaft of the first motor 2.

[0127] In a traditional motor structure, the stator is usually located on the outer periphery of the rotor, and the rotor rotates in the middle of the stator. The gap between the stator and the rotor forms a cylindrical surface. While for a disc motor, both the stator and the rotor adopt a disc design, and the stator and the rotor are distributed along the axial direction of the motor shaft. The gap between the stator and the rotor forms a plane perpendicular to the motor shaft. Applying the disc motor to a vehicle has the advantages of high power density, high efficiency, low noise, fast response, and compact structure.

[0128] As Figure 1 or Figure 2 shown, the center lines of the drive shafts of the engine 1, the first motor 2, and the second motor 3 are located on the same straight line. The drive shaft of the second motor 3 is sleeved around the outer periphery of the drive shaft of the first motor 2, saving the occupied space and making the structure of the hybrid power system more compact.

[0129] The embodiment of the present application further provides a vehicle, which includes the hybrid power system provided in any of the above embodiments.

[0130] The vehicle includes, but is not limited to, sedans, buses, trucks, sport utility vehicles (SUVs), etc.

[0131] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plurality" means two or more, unless otherwise clearly defined.

[0132] After considering the specification and practicing the present application disclosed herein, those skilled in the art will readily think of other implementation manners of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and the embodiments are only regarded as exemplary.

[0133] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A hybrid power system, characterized in that, The hybrid power system comprises an engine (1), a first motor (2), a second motor (3), a planetary gear train (4), a speed reduction mechanism (5), a first clutch (6), a second clutch (7) and an output shaft (8); The planetary gear train (4) comprises a sun gear (41), planetary gears (42), a planetary carrier (43) and a ring gear (44); the planetary gears (42) are located on the periphery of the sun gear (41) and mesh with the sun gear (41); the planetary gears (42) are mounted on the planetary carrier (43); the ring gear (44) surrounds the periphery of the planetary gears (42) and is used to constrain the rotation path of the planetary gears (42); the first clutch (6) is fixed to the housing of the hybrid system and connected to the ring gear (44); The second clutch (7) is respectively connected to the drive shaft of the engine (1) and the drive shaft of the first motor (2); the first motor (2) is transmission-connected to the planetary carrier (43); the second motor (3) is transmission-connected to the sun gear (41); the reduction mechanism (5) is respectively transmission-connected to the sun gear (41) and the output shaft (8); and the output shaft (8) is used to connect to the wheel (100).

2. The hybrid power system according to claim 1, wherein The speed reduction mechanism (5) comprises a first gear (51), a second gear (52) and a third gear (53), wherein the first gear (51) and the second gear (52) are meshed, and the second gear (52) and the third gear (53) are coaxially connected; The first gear (51) is in transmission connection with the sun gear (41), the third gear (53) is in transmission connection with the output shaft (8), and the diameter of the second gear (52) is greater than the diameter of the first gear (51).

3. The hybrid system according to claim 2, wherein The speed reduction mechanism (5) further includes a fourth gear (54) and a fifth gear (55) meshing with each other, and the hybrid power system further includes a third clutch (9) and a fourth clutch (10); The center line of the fourth gear (54) and the center line of the first gear (51) are located on the same straight line, the fifth gear (55) and the second gear (52) are coaxially connected, and the transmission ratio between the first gear (51) and the second gear (52) is smaller than the transmission ratio between the fourth gear (54) and the fifth gear (55); The third clutch (9) is respectively connected to the second motor (3), the sun gear (41) and the fourth gear (54); the fourth clutch (10) is respectively connected to the second motor (3), the sun gear (41) and the first gear (51).

4. The hybrid power system according to claim 3, characterized in that: The third clutch (9) comprises a housing (91), a first clutch plate (92) and a first pressure plate (93); the housing (91) is coaxially connected to the sun gear (41); the first clutch plate (92) is annular and fixed to the inner side of the housing (91); the first pressure plate (93) is connected to the fourth gear (54); when the first clutch (6) is engaged, the first pressure plate (93) is connected to the first clutch plate (92); The fourth clutch (10) comprises a second clutch plate (101) and a second pressure plate (102); the second clutch plate (101) is annular and fixed to the inner side of the housing (91); the second pressure plate (102) is connected to the first gear (51); when the second clutch (7) is engaged, the second pressure plate (102) is connected to the second clutch plate (101).

5. The hybrid power system according to claim 4, characterized in that: The hybrid power system includes a pure electric driving mode, and the pure electric driving mode includes a first gear, a second gear, a third gear, and a fourth gear; In the first gear, the fourth clutch (10) is engaged, the first clutch (6), the second clutch (7) and the third clutch (9) are all disengaged, and the second motor (3) drives the output shaft (8); In the second gear, the third clutch (9) is engaged, the first clutch (6), the second clutch (7) and the fourth clutch (10) are all disengaged, and the second motor (3) drives the output shaft (8); In the third gear, the first clutch (6) and the fourth clutch (10) are both engaged, the second clutch (7) and the third clutch (9) are both disengaged, and the first motor (2) and the second motor (3) drive the output shaft (8); In the fourth gear, the first clutch (6) and the third clutch (9) are both engaged, the second clutch (7) and the fourth clutch (10) are both disengaged, and the first motor (2) and the second motor (3) drive the output shaft (8).

6. The hybrid system according to claim 4, wherein The hybrid system includes a first hybrid mode; In the first hybrid mode, the second clutch (7) and the fourth clutch (10) are both engaged, the first clutch (6) and the third clutch (9) are both disengaged, the second motor (3) drives the output shaft (8), and the engine (1) drives the first motor (2) to generate electricity.

7. The hybrid power system according to claim 4, characterized in that: The hybrid system includes a second hybrid mode, the second hybrid mode including a fifth gear and a sixth gear; In the fifth gear, the first clutch (6), the second clutch (7) and the fourth clutch (10) are all engaged, the third clutch (9) is disengaged, and the engine (1), the first motor (2) and the second motor (3) drive the output shaft (8); In the sixth gear position, the first clutch (6), the second clutch (7) and the third clutch (9) are all engaged, the fourth clutch (10) is disengaged, and the engine (1), the first motor (2) and the second motor (3) drive the output shaft (8).

8. The hybrid power system according to claim 4, characterized in that: The hybrid power system includes an engine direct drive mode, and the engine direct drive mode includes a seventh gear position and an eighth gear position; In the seventh gear position, the first clutch (6), the second clutch (7) and the fourth clutch (10) are all engaged, the third clutch (9) is disengaged, and the engine (1) drives the output shaft (8); In the eighth gear position, the first clutch (6), the second clutch (7) and the third clutch (9) are all engaged, the fourth clutch (10) is disengaged, and the engine (1) drives the output shaft (8).

9. The hybrid system according to claim 1, wherein, Both the first motor (2) and the second motor (3) are disc motors, and the drive shaft collar of the second motor (3) is sleeved on the outer periphery of the drive shaft of the first motor (2).

10. A vehicle, characterized in that, The vehicle includes the hybrid power system according to any one of claims 1 to 9.

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