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 first planetary gear train, a second planetary gear train, a transmission gear set, an output shaft and a clutch set. The engine is in transmission connection with the first motor and the first planetary gear train, the second motor is in transmission connection with the second planetary gear train, and the first motor is electrically connected with the second motor; the transmission gear set is in transmission connection with the first planetary gear train, the second planetary gear train and the output shaft, and the output shaft is used for being connected with wheels. The clutch set is connected with the engine and the first planetary gear train. Through the arrangement, the working modes of the hybrid power system are greatly enriched.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a hybrid power system and a vehicle. Background Art

[0002] As a fast-paced, efficient means of transportation, the number of vehicles has been increasing year by year in recent years. Traditional vehicles mostly use fossil fuels (such as gasoline and diesel) to power their engines, which pollute the environment and violate energy conservation and environmental protection requirements. Therefore, it is necessary to use pollution-free new energy sources (such as electricity) to replace fossil fuels to power vehicles.

[0003] Currently, hybrid vehicles (HEVs) are gaining popularity in the new energy vehicle sector, thanks to their superior energy conservation and emission reduction capabilities, as well as their excellent user experience. The hybrid system is a key component of a HEV. Using both an engine and an electric motor as power sources, the vehicle can be driven by either oil or electricity, achieving both power and economy.

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

[0005] The structure of the hybrid power system in the above-mentioned related technologies is relatively simple and can meet simple transmission requirements, but the corresponding working mode is relatively single and difficult to adjust according to the user's actual working conditions, which affects the vehicle's fuel saving rate. 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, an embodiment of the present application provides a hybrid power system, the hybrid power system including an engine, a first motor, a second motor, a first planetary gear train, a second planetary gear train, a transmission gear set, an output shaft, and a clutch set;

[0009] The engine is respectively connected to the first motor and the first planetary gear train, the second motor is connected to the second planetary gear train, and the first motor and the second motor are electrically connected;

[0010] The transmission gear set is respectively connected to the first planetary gear train, the second planetary gear train and the output shaft, and the output shaft is used to connect to the wheels;

[0011] The clutch set is respectively connected to the engine and the first planetary gear train.

[0012] In a possible implementation manner, the first planetary gear train includes a first sun gear, a first planetary gear, a first planet carrier, a first ring gear, a second sun gear, a second planetary gear, a second planet carrier, and a second ring gear; the clutch set includes a first clutch, a second clutch, a third clutch, and a fourth clutch;

[0013] The first planetary gear is located on the outer periphery of the first sun gear and meshes with the first sun gear. The first planetary gear is mounted on the first planet carrier. The first ring gear surrounds the outer periphery of the first planetary gear and is used to constrain the rotation path of the first planetary gear;

[0014] The first sun gear and the second sun gear are coaxially connected. The second planetary gear is located on the outer periphery of the second sun gear and meshes with the second sun gear. The second planetary gear is mounted on the second planet carrier. The second ring gear surrounds the outer periphery of the second planetary gear and is used to constrain the rotation path of the second planetary gear. The second planet carrier is connected to the transmission gear set;

[0015] Wherein, the first clutch is connected to the first sun gear, the second clutch is connected to the first planet carrier, both the first clutch and the second clutch are in transmission connection with the engine, the third clutch is connected to the first ring gear, and the fourth clutch is connected to the second ring gear.

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

[0017] The second 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 planet carrier. When the second clutch is engaged, the second pressure plate is connected to the second clutch disc.

[0018] In a possible implementation manner, the hybrid power system further includes a first gear and a second gear. The drive shaft of the engine is coaxially connected to the first gear. The first gear is connected to the housing. The drive shaft of the first motor is coaxially connected to the second gear. The first gear and the second gear are meshed.

[0019] In a possible implementation manner, the second planetary gear train includes a third sun gear, third planetary gears, a third planetary carrier, and a third ring gear;

[0020] The third planetary gears are located on the outer periphery of the third sun gear and mesh with the third sun gear. The third planetary gears are mounted on the third planetary carrier. The third ring gear surrounds the third planetary gears and is used to constrain the rotation path of the third planetary gears;

[0021] Wherein, the second motor is connected to the third sun gear, the third planetary carrier is connected to the transmission gear set, and the third ring gear is fixed in the housing of the hybrid power system.

[0022] In a possible implementation manner, the transmission gear set includes a third gear, a fourth gear, and a fifth gear. The third gear is in transmission connection with the first planetary gear train and meshes with the fourth gear. The fourth gear and the fifth gear are coaxially connected. The fifth gear is respectively in transmission connection with the second planetary gear train and the output shaft. Wherein, the diameter of the fourth gear is greater than the diameter of the third gear.

[0023] In a possible implementation manner, the hybrid power system includes a pure electric drive mode;

[0024] In the pure electric drive mode, the first clutch, the second clutch, the third clutch, and the fourth clutch are all disengaged. The second motor drives the output shaft through the second planetary gear train and the transmission gear set.

[0025] In a possible implementation manner, the hybrid power system includes a first hybrid mode;

[0026] In the first hybrid mode, the first clutch, the second clutch, the third clutch, and the fourth clutch are all disengaged. The second motor drives the output shaft through the second planetary gear train and the transmission gear set, and the engine drives the first motor to generate electricity to provide electrical energy for the second motor.

[0027] In a possible implementation manner, the hybrid power system includes a second hybrid mode, and the second hybrid mode includes a first gear and a second gear;

[0028] In the first gear, the first clutch and the fourth clutch are both engaged, the second clutch and the third clutch are both disengaged. The engine drives the output shaft through the first planetary gear train and the transmission gear set, and the second motor drives the output shaft through the second planetary gear train and the transmission gear set;

[0029] In the second gear, the second clutch, the third clutch and the fourth clutch are all engaged, the first clutch is disengaged, the engine drives the output shaft through the first planetary gear train and the transmission gear set, and the second motor drives the output shaft through the second planetary gear train and the transmission gear set.

[0030] In a second aspect, an embodiment of the present application provides a vehicle, comprising a hybrid power system provided by any embodiment of the first aspect.

[0031] The beneficial effects of the technical solutions provided by the embodiments of the present application include at least the following: by providing a transmission connection between the engine and the first planetary gear train, and the first planetary gear train being respectively connected to the transmission gear set and the output shaft, the engine can drive the output shaft through the first planetary gear train and the transmission gear set, thereby driving the wheels; by providing a transmission connection between the second motor and the second planetary gear train, and the second planetary gear train being connected to the transmission gear set, the second motor can drive the output shaft through the second planetary gear train and the transmission gear set, thereby driving the wheels; because the engine is transmission-connected to the first motor, and the first motor and the second motor are electrically connected, the engine can drive the first motor to generate electricity, provide power for the second motor, and charge the power battery pack, thereby realizing a series drive mode; because the clutch group is respectively connected to the engine and the first planetary gear train, the engine transmission path and operating mode can be switched by engaging or disengaging the clutch group, thereby realizing the switching of the power source of the hybrid system, so that the hybrid system can realize at least a pure electric drive mode, a series drive mode, an engine-only drive mode, etc., greatly enriching the operating modes of the hybrid system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0033] Figure 1 A schematic diagram of the structure of a hybrid power system provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of power transmission of a hybrid system in pure electric drive mode provided by an embodiment of the present application;

[0035] Figure 3 A schematic diagram of power transmission of a hybrid power system provided in an embodiment of the present application in a first hybrid power mode;

[0036] Figure 4Schematic diagram of power transmission of the hybrid system provided by the embodiment of the present application in the first gear of the second hybrid mode;

[0037] Figure 5 Schematic diagram of power transmission of the hybrid system provided by the embodiment of the present application in the second gear of the second hybrid mode.

[0038] The reference numerals in the figure are respectively represented as:

[0039] 1 - Engine;

[0040] 2 - First motor;

[0041] 3 - Second motor;

[0042] 4 - First planetary gear train; 41 - First sun gear; 42 - First planetary gear; 43 - First planet carrier; 44 - First ring gear; 45 - Second sun gear; 46 - Second planetary gear; 47 - Second planet carrier; 48 - Second ring gear;

[0043] 5 - Second planetary gear train; 51 - Third sun gear; 52 - Third planetary gear; 53 - Third planet carrier; 54 - Third ring gear;

[0044] 6 - Transmission gear set; 61 - Third gear; 62 - Fourth gear; 63 - Fifth gear;

[0045] 7 - Output shaft;

[0046] 8 - Clutch set; 81 - First clutch; 811 - Housing; 812 - First clutch plate; 813 - First pressure plate; 82 - Second clutch; 821 - Second clutch plate; 822 - Second pressure plate; 83 - Third clutch; 84 - Fourth clutch;

[0047] 9 - First gear;

[0048] 10 - Second gear;

[0049] 100 - Wheel.

[0050] 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 implementation manners

[0051] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] The directional terms used in the embodiments of this application, such as "upper," "lower," and "side," are generally based on the relative positions shown in the figures. These directional terms are used only to more clearly describe the relationships between structures and are not intended to describe absolute positions. When the product is placed in different postures, the position may change; for example, "upper" and "lower" may be interchangeable.

[0053] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those skilled in the art.

[0054] In order to make the technical solutions and advantages of the present application clearer, the implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0055] An embodiment of the present application provides a hybrid power system, which is applied to vehicles, including but not limited to sedans, buses, trucks, and sport utility vehicles (SUVs).

[0056] like Figure 1 As shown, the hybrid system includes an engine 1 , a first motor 2 , a second motor 3 , a first planetary gear train 4 , a second planetary gear train 5 , a transmission gear set 6 , an output shaft 7 and a clutch set 8 .

[0057] The engine 1 is respectively connected to the first motor 2 and the first planetary gear train 4 in a transmission manner, the second motor 3 is connected to the second planetary gear train 5 in a transmission manner, and the first motor 2 and the second motor 3 are electrically connected.

[0058] The transmission gear set 6 is respectively connected to the first planetary gear train 4 , the second planetary gear train 5 and the output shaft 7 , and the output shaft 7 is used to connect to the wheel 100 .

[0059] The clutch group 8 is connected to the engine 1 and the first planetary gear train 4 respectively.

[0060] Among them, the hybrid power system further includes a power battery pack, an inverter, and a transformer. The power battery pack is electrically connected to the first motor 2 and the second motor 3 respectively. 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 electrical 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.

[0061] The first planetary gear train 4 is used to adjust the transmission ratio between the engine 1 and the output shaft 7. For example, it can achieve deceleration and torque increase between the engine 1 and the output shaft 7, so that the engine 1 exerts a greater driving force on the output shaft 7, and thus drives the wheel 100 through the output shaft 7.

[0062] The second planetary gear train 5 is used to adjust the transmission ratio between the second motor 3 and the output shaft 7. For example, it can achieve deceleration and torque increase between the second motor 3 and the output shaft 7, so that the second motor 3 exerts a greater driving force on the output shaft 7, and thus drives the wheel 100 through the output shaft 7.

[0063] The transmission gear set 6 is used to realize the transmission connection between the output shaft 7 and the first planetary gear train 4 and the second planetary gear train 5, so that the engine 1 and the second motor 3 can transmit power to the output shaft 7.

[0064] The clutch set 8 can change the connection state between the engine 1 and the first planetary gear train 4 through its own engagement or disengagement, thereby changing the power transmission path between the engine 1, the first planetary gear train 4 and the transmission gear set 6, and improving the flexibility and applicability of the hybrid power system.

[0065] The embodiment of the present application provides a hybrid power system. By setting the engine 1 and the first planetary gear train 4 to be transmission-connected, and the first planetary gear train 4 is respectively connected to the transmission gear set 6 and the output shaft 7, the engine 1 can drive the output shaft 7 through the first planetary gear train 4 and the transmission gear set 6, and then drive the wheel 100; by setting the second motor 3 to be transmission-connected to the second planetary gear train 5, and the second planetary gear train 5 is connected to the transmission gear set 6, the second motor 3 can drive the output shaft 7 through the second planetary gear train 5 and the transmission gear set 6, and then drive the wheel 100; since the engine 1 is transmission-connected to the first motor 2, and the first motor 2 and the second motor 3 are electrically connected, the engine 1 can drive the first motor 2 to generate electricity, provide power for the second motor 3 and charge the power battery pack, realizing a series drive mode; since the clutch set 8 is respectively connected to the engine 1 and the first planetary gear train 4, therefore, through the engagement or disengagement of the clutch set 8, the switching of the transmission path and the working mode of the engine 1 can be realized, and further the switching of the power source of the hybrid power system can be realized, 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., greatly enriching the working modes of the hybrid power system.

[0066] In some embodiments, as Figure 1 As shown, the first planetary gear train 4 includes a first sun gear 41, a first planetary gear 42, a first planetary carrier 43, a first ring gear 44, a second sun gear 45, a second planetary gear 46, a second planetary carrier 47 and a second ring gear 48. Figure 2 As shown, the clutch group 8 includes a first clutch 81 , a second clutch 82 , a third clutch 83 and a fourth clutch 84 .

[0067] The first planetary gear 42 is located on the outer periphery of the first sun gear 41 and meshes with the first sun gear 41 . The first planetary gear 42 is mounted on the first planetary carrier 43 . The first ring gear 44 surrounds the outer periphery of the first planetary gear 42 and is used to constrain the rotation path of the first planetary gear 42 .

[0068] The first sun gear 41 and the second sun gear 45 are coaxially connected, the second planetary gear 46 is located on the outer periphery of the second sun gear 45 and meshes with the second sun gear 45, the second planetary gear 46 is mounted on the second planetary carrier 47, the second ring gear 48 surrounds the outer periphery of the second planetary gear 46 and is used to constrain the rotation path of the second planetary gear 46, and the second planetary carrier 47 is connected to the transmission gear set 6.

[0069] Among them, the first clutch 81 is connected to the first sun gear 41, the second clutch 82 is connected to the first planetary carrier 43, the first clutch 81 and the second clutch 82 are both transmission-connected to the engine 1, the third clutch 83 is connected to the first ring gear 44, and the fourth clutch 84 is connected to the second ring gear 48.

[0070] like Figure 1 As shown, the third clutch 83 and the fourth clutch 84 are fixed to the case of the hybrid system.

[0071] In this embodiment, by engaging or disengaging the first clutch 81, the second clutch 82, the third clutch 83 and the fourth clutch 84, the power transmission path of the first planetary gear system 4 can be changed, thereby changing the transmission ratio of the first planetary gear system 4 and further changing the mode or gear of the hybrid power system.

[0072] When the first clutch 81 is engaged, the first clutch 81 rotates synchronously with the first sun gear 41, and the power of the engine 1 can be transmitted to the first sun gear 41; when the first clutch 81 is disengaged, the first clutch 81 and the first sun gear 41 can generate relative rotation, and the power of the engine 1 cannot be transmitted to the first sun gear 41 through the first clutch 81.

[0073] When the second clutch 82 is engaged, the second clutch 82 rotates synchronously with the first planet carrier 43, and the power of the engine 1 can be transmitted to the first planet carrier 43; when the second clutch 82 is disengaged, relative rotation can occur between the second clutch 82 and the first planet carrier 43, and the power of the engine 1 cannot be transmitted to the first planet carrier 43 through the second clutch 82.

[0074] When the third clutch 83 is engaged, the first ring gear 44 is fixed and cannot rotate relative to the housing of the hybrid power system; when the third clutch 83 is disengaged, the first ring gear 44 can rotate relative to the housing of the hybrid power system.

[0075] When the fourth clutch 84 is engaged, the second ring gear 48 is fixed and cannot rotate relative to the housing of the hybrid power system; when the fourth clutch 84 is disengaged, the second ring gear 48 can rotate relative to the housing of the hybrid power system.

[0076] In some embodiments, the first clutch 81 includes a housing 811, a first clutch disc 812, and a first pressure plate 813. The housing 811 is connected to the drive shaft of the engine 1. The first clutch disc 812 is annular and fixed to the inner side of the housing 811. The first pressure plate 813 is connected to the first sun gear 41. When the first clutch 81 is engaged, the first pressure plate 813 is connected to the first clutch disc 812.

[0077] The second clutch 82 includes a second clutch disc 821 and a second pressure plate 822. The second clutch disc 821 is annular and fixed to the inner side of the housing 811. The second pressure plate 822 is connected to the first planet carrier 43. When the second clutch 82 is engaged, the second pressure plate 822 is connected to the second clutch disc 821.

[0078] Specifically, when the first clutch 81 is engaged, the power of the engine 1 is sequentially transmitted to the first sun gear 41 through the housing 811, the first clutch disc 812, and the first pressure plate 813; when the second clutch 82 is engaged, the power of the engine 1 is sequentially transmitted to the first planet carrier 43 through the housing 811, the second clutch disc 821, and the second pressure plate 822.

[0079] In this embodiment, the first clutch 81 and the second clutch 82 form a dual clutch. The first clutch 81 and the second clutch 82 share the same housing 811, which is beneficial to reducing the space occupied by the first clutch 81 and the second clutch 82 while realizing the connection between the first clutch 81 / second clutch 82 and the engine 1.

[0080] In some embodiments, the hybrid power system further includes a first gear 9 and a second gear 10. The drive shaft of the engine 1 is coaxially connected to the first gear 9, the first gear 9 is connected to the housing 811, the drive shaft of the first motor 2 is coaxially connected to the second gear 10, and the first gear 9 and the second gear 10 are meshed with each other.

[0081] In this embodiment, through the meshing of the first gear 9 and the second gear 10, the power of the engine 1 can be transmitted to the first motor 2, enabling the first motor 2 to convert mechanical energy into electrical energy, and then transmitting the electrical energy to the second motor 3 and / or the power battery pack to achieve functions such as in-vehicle charging.

[0082] In some embodiments, the second planetary gear train 5 includes a third sun gear 51, third planet gears 52, a third planet carrier 53, and a third ring gear 54.

[0083] The third planet gears 52 are located on the outer periphery of the third sun gear 51 and are meshed with the third sun gear 51. The third planet gears 52 are mounted on the third planet carrier 53. The third ring gear 54 surrounds the third planet gears 52 and is used to constrain the rotation path of the third planet gears 52.

[0084] Wherein, the second motor 3 is connected to the third sun gear 51, the third planet carrier 53 is connected to the transmission gear set 6, and the third ring gear 54 is fixed in the housing of the hybrid power system.

[0085] Exemplarily, the second motor 3 is connected to the third sun gear 51 through a hollow shaft, the third planet carrier 53 is connected to the transmission gear set 6 through an intermediate shaft. The hollow shaft is sleeved on the outer periphery of the intermediate shaft, and the hollow shaft and the central shaft can rotate relative to each other.

[0086] Exemplarily, the power transmission path among the second motor 3, the second planetary gear train 5, the transmission gear set 6, and the output shaft 7 is as follows: The second motor 3 drives the third sun gear 51 to rotate through the hollow shaft. Since the third ring gear 54 is stationary, the third planet gears 52 rotate along the tooth surface of the third ring gear 54 driven by the third sun gear 51, thereby driving the third planet carrier 53 to rotate. The third planet carrier 53 transmits the power to the transmission gear set 6 through the intermediate shaft, and the transmission gear set 6 further transmits the power to the output shaft 7, enabling the output shaft 7 to drive the wheel 100 to rotate.

[0087] In this embodiment, the third ring gear 54 is a fixed member, the third sun gear 51 is a driving member, the third planet carrier 53 is a driven member, and the third planet gear train 5 is a speed reduction transmission, that is, the rotational speed of the third planet carrier 53 is less than the rotational speed of the third sun gear 51. The third planet gear train 5 plays a role of reducing speed and increasing torque between the second motor 3 and the output shaft 7, enabling the second motor 3 to apply a greater driving force to the output shaft 7 and improving the power of the whole vehicle.

[0088] Based on any of the above embodiments, the transmission gear set 6 includes a third gear 61, a fourth gear 62, and a fifth gear 63. The third gear 61 is drivingly connected to the first planetary gear train 4 and meshes with the fourth gear 62. The fourth gear 62 and the fifth gear 63 are coaxially connected. The fifth gear 63 is respectively drivingly connected to the second planetary gear train 5 and the output shaft 7. Wherein, the diameter of the fourth gear 62 is larger than that of the third gear 61.

[0089] Exemplarily, as Figure 1 shown, the third gear 61 is connected to the second planet carrier 47. The power of the second planet carrier 47 can be sequentially transmitted to the third gear 61, the fourth gear 62, the fifth gear 63, and the output shaft 7.

[0090] Exemplarily, as Figure 1 shown, the fifth gear 63 is connected to the third planet carrier 53. The power of the second motor 3 can be sequentially transmitted to the third sun gear 51, the third planet gear 52, the third planet carrier 53, the fifth gear 63, and the output shaft 7.

[0091] Since the diameter of the fourth gear 62 is larger than that of the third gear 61, the number of teeth of the fourth gear 62 is greater than that of the third gear 61. Therefore, when the third gear 61 drives the fourth gear 62, the effect of decelerating and increasing torque is achieved, which helps the engine 1 to apply a greater torque and driving force to the output shaft 7 through the first planetary gear train 4 and the transmission gear set 6, improving the power of the whole vehicle.

[0092] In some embodiments, the hybrid power system includes a pure electric drive mode.

[0093] As Figure 2 shown, in the pure electric drive mode, the first clutch 81, the second clutch 82, the third clutch 83, and the fourth clutch 84 are all disengaged. The second motor 3 drives the output shaft 7 through the second planetary gear train 5 and the transmission gear set 6.

[0094] In the pure electric drive mode, the engine 1 and the first motor 2 do not work. The second motor 3 drives the output shaft 7 to drive the vehicle to travel. After the power battery pack converts direct current into three-phase alternating current through an inverter / transformer, it drives the second motor 3. The second motor 3 drives the output shaft 7 to rotate through the second planetary gear train 5 and the transmission gear set 6, and then drives the wheel 100 to rotate.

[0095] The pure electric drive mode is applicable to the vehicle starting stage, low-speed driving, and the working conditions where the vehicle battery is fully charged, which can avoid the energy loss caused by the frequent start and stop of the engine 1, thereby improving the fuel saving rate.

[0096] Among them, the pure electric drive mode can achieve reverse working conditions and energy recovery working conditions.

[0097] In the reverse driving condition, the second motor 3 rotates in the reverse direction, causing the second planetary gear set 5, the transmission gear set 6, and the output shaft 7 to drive the wheels 100 to rotate in the reverse direction, thereby achieving reverse driving. Since the vehicle speed is relatively slow and the reverse time is relatively 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.

[0098] In the energy recovery condition, the wheels 100 decelerate, and the wheels 100 drive the second motor 3 through the output shaft 7 and the transmission gear set 6, enabling the second motor 3 to convert the kinetic energy of the vehicle into electrical energy through negative torque and then charge the power battery pack.

[0099] In some embodiments, the hybrid power system includes a first hybrid mode.

[0100] As Figure 3 shown, in the first hybrid mode, the first clutch 81, the second clutch 82, the third clutch 83, and the fourth clutch 84 are all disengaged. The second motor 3 drives the output shaft 7 through the second planetary gear set 5 and the transmission gear set 6, and the engine 1 drives the first motor 2 to generate electricity to provide electrical energy for the second motor 3.

[0101] In the first hybrid mode, the hybrid power system constitutes a series drive mode. The engine 1 drives the first motor 2 to generate electricity. The engine 1 and the first motor 2 function as power generation, rather than driving the wheels 100. A part of the electrical energy generated by the first motor 2 is transmitted to the power battery pack for storage, and a part is converted from direct current to three-phase alternating current through an inverter / transformer and then transmitted to the second motor 3 to provide electrical energy for the second motor 3. The second motor 3 is mainly responsible for providing power to drive the wheels 100 to rotate.

[0102] 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 high-efficiency range for power generation, avoiding high fuel consumption and high emissions in the idle and low-speed conditions.

[0103] In some embodiments, the hybrid power system includes a second hybrid mode, and the second hybrid mode includes a first gear and a second gear.

[0104] As Figure 4 shown, in the first gear, the first clutch 81 and the fourth clutch 84 are both engaged, the second clutch 82 and the third clutch 83 are both disengaged. The engine 1 drives the output shaft 7 through the first planetary gear set 4 and the transmission gear set 6, and the second motor 3 drives the output shaft 7 through the second planetary gear set 5 and the transmission gear set 6.

[0105] As Figure 5As shown, in the second gear position, the second clutch 82, the third clutch 83, and the fourth clutch 84 are all engaged, and the first clutch 81 is disengaged. The engine 1 drives the output shaft 7 through the first planetary gear set 4 and the transmission gear set 6, and the second motor 3 drives the output shaft 7 through the second planetary gear set 5 and the transmission gear set 6.

[0106] In the second hybrid mode, the hybrid system forms a parallel drive mode. The engine 1 and the second motor 3 can work together to jointly drive the vehicle, thereby outputting a larger power and improving the dynamic performance of the whole vehicle.

[0107] The second hybrid mode is applicable to working conditions such as high-speed cruising, starting and accelerating, 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.

[0108] As Figure 4 shown, in the first gear position, the first clutch 81 is engaged, and the power of the engine 1 is transmitted to the first sun gear 41 through the first clutch 81. The first sun gear 41 and the second sun gear 45 connected coaxially rotate synchronously. Since the fourth clutch 84 is engaged and the second ring gear 48 is a fixed part, the second sun gear 45 transmits the power to the second planet gear 46 and the second planet carrier 47 in sequence. The second sun gear 45, the second planet gear 46, and the second planet carrier 47 play a role in reducing speed and increasing torque between the engine 1 and the transmission gear set 6. The second planet carrier 47 further transmits the power to the third gear 61, the fourth gear 62, and the fifth gear 63 in sequence. At the same time, the power of the second motor 3 is transmitted to the third sun gear 51, the third planet gear 52, the third planet carrier 53, and the fifth gear 63 in sequence. The power of the engine 1 and the second motor 3 is coupled at the fifth gear 63, and the coupled power is further transmitted to the output shaft 7 to drive the wheel 100 to rotate.

[0109] As Figure 5As shown, in the second gear position, the second clutch 82, the third clutch 83, and the fourth clutch 84 are all engaged. The first ring gear 44 is a fixed member, the first planet carrier 43 is the driving member, and the first sun gear 41 is the driven member. The power of the engine 1 is transmitted to the first planet carrier 43 through the second clutch 82. The first planet carrier 43 transmits the power to the first sun gear 41 through the first planet gear 42. The first planet carrier 43, the first planet gear 42, and the first sun gear 41 play a role in speed increasing transmission. The second ring gear 48 is a fixed member, the second sun gear 45 is the driving member, and the second planet carrier 47 is the driven member. The second sun gear 45 coaxially connected to the first sun gear 41 transmits the power to the second planet gear 46 and the second planet carrier 47 in sequence. The second planet carrier 47 further transmits the power to the third gear 61, the fourth gear 62, and the fifth gear 63 in sequence. At the same time, the power of the second motor 3 is transmitted to the third sun gear 51, the third planet gear 52, the third planet carrier 53, and the fifth gear 63 in sequence. The power of the engine 1 and the second motor 3 is coupled at the fifth gear 63, and the coupled power is further transmitted to the output shaft 7 to drive the wheel 100 to rotate.

[0110] When the engine 1 outputs the same rotational speed, compared with the first gear position, the first planetary gear train 4 in the second gear position can output a greater rotational speed to the transmission gear set 6, providing higher output power for the vehicle.

[0111] Since the power transmission routes of the first gear position and the second gear position are different, the transmission ratios of the first gear position and the second gear position are different, so they are applicable to different working conditions of the vehicle.

[0112] This application also provides a vehicle, which includes the hybrid power system provided in any of the above embodiments.

[0113] Vehicles include, but are not limited to, sedans, buses, trucks, sport utility vehicles (SUVs), etc.

[0114] In this 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.

[0115] After considering the specification and practicing the present application disclosed herein, those skilled in the art will readily think of other implementation schemes of the present application. This application aims to cover any variations, uses, or adaptive changes of the present application, and these variations, uses, or adaptive changes 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 embodiments are only regarded as exemplary.

[0116] 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 includes an engine (1), a first motor (2), a second motor (3), a first planetary gear train (4), a second planetary gear train (5), a transmission gear set (6), an output shaft (7), and a clutch set (8); The engine (1) is respectively in transmission connection with the first motor (2) and the first planetary gear train (4), the second motor (3) is in transmission connection with the second planetary gear train (5), and the first motor (2) and the second motor (3) are electrically connected; The transmission gear set (6) is respectively in transmission connection with the first planetary gear train (4), the second planetary gear train (5), and the output shaft (7), and the output shaft (7) is used for connecting to a wheel (100); The clutch set (8) is respectively connected to the engine (1) and the first planetary gear train (4).

2. The hybrid system according to claim 1, wherein The first planetary gear train (4) includes a first sun gear (41), a first planetary gear (42), a first planet carrier (43), a first ring gear (44), a second sun gear (45), a second planetary gear (46), a second planet carrier (47), and a second ring gear (48); the clutch set (8) includes a first clutch (81), a second clutch (82), a third clutch (83), and a fourth clutch (84); The first planetary gear (42) is located on the outer periphery of the first sun gear (41) and meshes with the first sun gear (41), the first planetary gear (42) is mounted on the first planet carrier (43), the first ring gear (44) surrounds the first planetary gear (42), and is used to constrain the rotation path of the first planetary gear (42); The first sun gear (41) and the second sun gear (45) are coaxially connected, the second planetary gear (46) is located on the outer periphery of the second sun gear (45) and meshes with the second sun gear (45), the second planetary gear (46) is mounted on the second planet carrier (47), the second ring gear (48) surrounds the second planetary gear (46), and is used to constrain the rotation path of the second planetary gear (46), and the second planet carrier (47) is connected to the transmission gear set (6); Wherein, the first clutch (81) is connected to the first sun gear (41), the second clutch (82) is connected to the first planet carrier (43), both the first clutch (81) and the second clutch (82) are in transmission connection with the engine (1), the third clutch (83) is connected to the first ring gear (44), and the fourth clutch (84) is connected to the second ring gear (48).

3. The hybrid power system according to claim 2, characterized in that, The first clutch (81) includes a housing (811), a first clutch disc (812), and a first pressure plate (813). The housing (811) is connected to the drive shaft of the engine (1). The first clutch disc (812) is annular and fixed to the inner side of the housing (811). The first pressure plate (813) is connected to the first sun gear (41). When the first clutch (81) is engaged, the first pressure plate (813) is connected to the first clutch disc (812). The second clutch (82) includes a second clutch disc (821) and a second pressure plate (822). The second clutch disc (821) is annular and fixed to the inner side of the housing (811). The second pressure plate (822) is connected to the first planet carrier (43). When the second clutch (82) is engaged, the second pressure plate (822) is connected to the second clutch disc (821).

4. The hybrid system according to claim 3, wherein The hybrid power system further includes a first gear (9) and a second gear (10). The drive shaft of the engine (1) is coaxially connected to the first gear (9). The first gear (9) is connected to the housing (811). The drive shaft of the first motor (2) is coaxially connected to the second gear (10). The first gear (9) and the second gear (10) are meshed with each other.

5. The hybrid system according to claim 1, wherein The second planetary gear train (5) includes a third sun gear (51), a third planet gear (52), a third planet carrier (53), and a third ring gear (54). The third planet gear (52) is located on the outer periphery of the third sun gear (51) and meshes with the third sun gear (51). The third planet gear (52) is mounted on the third planet carrier (53). The third ring gear (54) surrounds the third planet gear (52) and is used to restrict the rotation path of the third planet gear (52). Wherein, the second motor (3) is connected to the third sun gear (51). The third planet carrier (53) is connected to the transmission gear set (6). The third ring gear (54) is fixed in the housing of the hybrid power system.

6. The hybrid power system according to any one of claims 1 to 5, characterized in that The transmission gear set (6) includes a third gear (61), a fourth gear (62), and a fifth gear (63). The third gear (61) is in transmission connection with the first planetary gear train (4) and meshes with the fourth gear (62). The fourth gear (62) and the fifth gear (63) are coaxially connected. The fifth gear (63) is in transmission connection with the second planetary gear train (5) and the output shaft (7) respectively. Wherein, the diameter of the fourth gear (62) is larger than the diameter of the third gear (61).

7. The hybrid system according to claim 2, wherein The hybrid power system includes a pure electric drive mode. In the pure electric drive mode, the first clutch (81), the second clutch (82), the third clutch (83), and the fourth clutch (84) are all disengaged. The second motor (3) drives the output shaft (7) through the second planetary gear train (5) and the transmission gear set (6).

8. The hybrid system according to claim 2, characterized in that, The hybrid system includes a first hybrid mode; In the first hybrid mode, the first clutch (81), the second clutch (82), the third clutch (83) and the fourth clutch (84) are all disengaged. The second motor (3) drives the output shaft (7) through the second planetary gear train (5) and the transmission gear set (6), and the engine (1) drives the first motor (2) to generate electricity to supply electrical energy to the second motor (3).

9. The hybrid power system according to claim 2, wherein, The hybrid system includes a second hybrid mode, and the second hybrid mode includes a first gear and a second gear; In the first gear, the first clutch (81) and the fourth clutch (84) are both engaged, the second clutch (82) and the third clutch (83) are both disengaged. The engine (1) drives the output shaft (7) through the first planetary gear train (4) and the transmission gear set (6), and the second motor (3) drives the output shaft (7) through the second planetary gear train (5) and the transmission gear set (6); In the second gear, the second clutch (82), the third clutch (83) and the fourth clutch (84) are all engaged, the first clutch (81) is disengaged. The engine (1) drives the output shaft (7) through the first planetary gear train (4) and the transmission gear set (6), and the second motor (3) drives the output shaft (7) through the second planetary gear train (5) and the transmission gear set (6).

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

Images