Hybrid systems and vehicles

Abstract

This disclosure provides a hybrid power system and a vehicle, belonging to the field of vehicle technology. The hybrid power system includes a first electric motor, a second electric motor, an engine, a first transmission assembly, a second transmission assembly, a third transmission assembly, a differential, a drive assembly, and a controller. Using this disclosure, the controller can control the engagement or disengagement of the first, second, and third clutches, thereby combining the first electric motor, second electric motor, engine, first transmission assembly, second transmission assembly, third transmission assembly, and differential into different power systems, thus achieving different driving modes and improving the diversity of driving modes in the hybrid power system.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and more specifically to a hybrid power system and a vehicle. Background Technology

[0002] With the continuous development of vehicle engineering technology, hybrid powertrain has gradually become the mainstream drive mode for vehicles.

[0003] Current hybrid systems typically integrate the electric motor and engine directly at the front or rear of the transmission.

[0004] Although the aforementioned hybrid power system can achieve power transmission, its simple structure and low transmission efficiency result in a relatively limited driving mode. Summary of the Invention

[0005] This disclosure provides a hybrid power system and vehicle capable of achieving different driving modes, thereby improving the diversity of driving modes in the hybrid power system. The technical solution is as follows:

[0006] On one hand, this disclosure provides a hybrid power system, which includes a first motor, a second motor, an engine, a first transmission assembly, a second transmission assembly, a third transmission assembly, a differential, a drive assembly, and a controller;

[0007] The first transmission assembly includes a first sun gear, a first planetary gear set, a first planetary carrier, a second planetary gear set, a ring gear, a second planetary carrier, and a second sun gear, all coaxially arranged. The first sun gear is coaxially connected to the output shaft of the first motor. The first planetary gear set meshes with the first sun gear. The first planetary carrier engages with the first planetary gear set and is coaxially connected to the output shaft of the engine. The ring gear is sleeved around the outside of the first and second planetary gear sets and meshes with both sets. The second planetary carrier engages with the second planetary gear set. The second sun gear meshes with the second planetary gear set and is coaxially connected to the output shaft of the engine.

[0008] The second transmission assembly includes a first gear, a second gear, and a third gear. The first gear is coaxially connected to the output shaft of the second motor, and the second gear meshes with the first gear and the third gear, respectively.

[0009] The third transmission assembly includes a fourth gear, a fifth gear, and a sixth gear. The fourth gear, the fifth gear, and the second gear are coaxially connected. The fourth gear meshes with the input shaft of the differential. The output shaft of the differential is used for transmission connection with the vehicle's wheels. The sixth gear meshes with the fifth gear. The transmission ratio between the sixth gear and the fifth gear is less than the transmission ratio between the third gear and the second gear.

[0010] The drive assembly includes a first clutch, a second clutch, and a third clutch. The first clutch is used to engage or disengage the output shaft of the first motor from the brake end. The second clutch is used to engage or disengage the third gear and the second planetary carrier. The third clutch is used to engage or disengage the sixth gear and the second planetary carrier.

[0011] The controller is electrically connected to the first motor, the second motor, the engine, the differential, the first clutch, the second clutch, and the third clutch.

[0012] In one possible implementation, the controller is configured to:

[0013] When the vehicle is in pure electric drive mode, the second motor is controlled to work, the first motor and the engine are controlled to stop working, and the first clutch, the second clutch and the third clutch are controlled to disengage.

[0014] In one possible implementation, the controller is configured to:

[0015] When the vehicle is in hybrid drive mode, the first motor, the second motor and the engine are controlled to work, the third clutch is controlled to engage, and the first clutch and the second clutch are controlled to disengage.

[0016] In one possible implementation, the controller is configured to:

[0017] When the vehicle is in hybrid drive mode, the first motor, the second motor and the engine are controlled to work, the second clutch is controlled to engage, and the first clutch and the third clutch are controlled to disengage.

[0018] In one possible implementation, the controller is configured to:

[0019] When the vehicle is in engine direct drive mode, the second motor and the engine are controlled to work, the first motor is controlled to stop working, the first clutch and the third clutch are controlled to engage, and the second clutch is controlled to disengage.

[0020] In one possible implementation, the controller is configured to:

[0021] When the vehicle is in engine direct drive mode, the second motor and the engine are controlled to work, the first motor is controlled to stop working, the first clutch and the second clutch are controlled to engage, and the third clutch is controlled to disengage.

[0022] In one possible implementation, the controller is configured to:

[0023] When the vehicle is in energy recovery mode, the first motor, the second motor and the engine are controlled to stop working, and the first clutch, the second clutch and the third clutch are controlled to disengage.

[0024] In one possible implementation, the hybrid power system further includes a power battery electrically connected to the first motor, the second motor, and the controller.

[0025] In one possible implementation, the hybrid power system further includes a first inverter and a second inverter, wherein the first inverter is electrically connected to the first motor, the power battery and the controller, and the second inverter is electrically connected to the second motor, the power battery and the controller.

[0026] On the other hand, embodiments of this disclosure provide a vehicle that includes a hybrid power system as described in any of the preceding claims.

[0027] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0028] This disclosure provides a hybrid power system in which the controller can control the engagement or disengagement of the first clutch, the second clutch, and the third clutch to combine the first motor, the second motor, the engine, the first transmission assembly, the second transmission assembly, the third transmission assembly, and the differential into different power systems, thereby achieving different driving modes and improving the diversity of driving modes of the hybrid power system.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a hybrid power system shown in an embodiment of this disclosure;

[0032] Figure 2 This is a schematic diagram illustrating the working process of a hybrid power system when a vehicle is in pure electric drive mode, according to an embodiment of this disclosure.

[0033] Figure 3 This is a schematic diagram illustrating the working process of a hybrid power system when a vehicle is in hybrid first gear drive mode, as shown in an embodiment of this disclosure.

[0034] Figure 4 This is a schematic diagram illustrating the working process of a hybrid power system when a vehicle is in hybrid 2nd gear drive mode, as shown in an embodiment of this disclosure.

[0035] Figure 5 This is a schematic diagram illustrating the working process of a hybrid power system when a vehicle is in engine 1st gear direct drive mode, as shown in an embodiment of this disclosure.

[0036] Figure 6 This is a schematic diagram illustrating the working process of a hybrid power system when a vehicle is in engine 2nd gear direct drive mode, as shown in an embodiment of this disclosure.

[0037] Figure 7 This is a schematic diagram illustrating the working process of a hybrid power system when a vehicle is in energy recovery mode, as shown in an embodiment of this disclosure.

[0038] Legend

[0039] 1. First motor; 2. Second motor; 3. Engine; 4. First transmission assembly; 5. Second transmission assembly; 6. Third transmission assembly; 7. Differential; 8. Drive assembly; 91. Power battery; 92. First inverter; 93. Second inverter;

[0040] 41. First sun gear; 42. First planetary gear set; 43. First planetary carrier; 44. Second planetary gear set; 45. Ring gear; 46. Second planetary carrier; 47. Second sun gear;

[0041] 51. First gear; 52. Second gear; 53. Third gear;

[0042] 61. Fourth gear; 62. Fifth gear; 63. Sixth gear;

[0043] 82. First clutch; 82. Second clutch; 83. Third clutch;

[0044] 10. Wheels. Detailed Implementation

[0045] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” encompasses the element or object listed following “comprising” or “including” and its equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0046] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0047] This disclosure provides a hybrid power system, see [link to relevant documentation]. Figure 1 The hybrid power system includes a first motor 1, a second motor 2, an engine 3, a first transmission assembly 4, a second transmission assembly 5, a third transmission assembly 6, a differential 7, a drive assembly 8, and a controller.

[0048] Among them, the first motor 1, the second motor 2 and the engine 3 can all drive the vehicle's wheels 10 to rotate, providing output torque for the rotation of the wheels 10.

[0049] The first transmission assembly 4 includes a first sun gear 41, a first planetary gear set 42, a first planetary carrier 43, a second planetary gear set 44, a ring gear 45, a second planetary carrier 46, and a second sun gear 47, all coaxially arranged. The first sun gear 41 is coaxially connected to the output shaft of the first motor 1. The first planetary gear set 42 meshes with the first sun gear 41. The first planetary carrier 43 engages with the first planetary gear set 42 and is coaxially connected to the output shaft of the engine 3. The ring gear 45 is sleeved around the outside of the first planetary gear set 42 and the second planetary gear set 44 and meshes with both the first planetary gear set 42 and the second planetary gear set 44. The second planetary carrier 46 engages with the second planetary gear set 44. The second sun gear 47 meshes with the second planetary gear set 44 and is coaxially connected to the output shaft of the engine 3.

[0050] In this embodiment of the disclosure, "cooperation" means that the coaxial connection or non-connection can be achieved through the driving component 8 described later.

[0051] The coaxial connection in this embodiment enables simultaneous rotation in the same direction and at the same speed, or simultaneous stopping of rotation. For example, the first sun gear 41 is coaxially connected to the output shaft of the first motor 1. That is, when the first sun gear 41 rotates, it will drive the output shaft of the first motor 1 to rotate in the same direction and at the same speed. When the output shaft of the first motor 1 rotates, it will drive the first sun gear 41 to rotate in the same direction and at the same speed. When the output shaft of the first motor 1 stops rotating, the first sun gear 41 also stops rotating at the same time.

[0052] The second transmission assembly 5 includes a first gear 51, a second gear 52 and a third gear 53. The first gear 51 is coaxially connected to the output shaft of the second motor 2, and the second gear 52 meshes with the first gear 51 and the third gear 53 respectively.

[0053] The third transmission assembly 6 includes a fourth gear 61, a fifth gear 62, and a sixth gear 63. The fourth gear 61, the fifth gear 62, and the second gear 52 are coaxially connected. The fourth gear 61 meshes with the input shaft of the differential 7. The output shaft of the differential 7 is used for transmission connection with the vehicle's wheels 10. The sixth gear 63 meshes with the fifth gear 62. The transmission ratio between the sixth gear 63 and the fifth gear 62 is less than the transmission ratio between the third gear 53 and the second gear 52.

[0054] The drive assembly 8 includes a first clutch 81, a second clutch 82 and a third clutch 83. The first clutch 81 is used to engage or disengage the output shaft of the first motor 1 from the brake end. The second clutch 82 is used to engage or disengage the third gear 53 and the second planetary carrier 46. The third clutch 83 is used to engage or disengage the sixth gear 63 and the second planetary carrier 46.

[0055] The braking end can be any non-rotating device on the vehicle, such as any position on the frame, etc., and this disclosure does not limit it.

[0056] When the first clutch 81 is engaged, the output shaft of the first motor 1 is connected to the braking end, and the braking end can stop the output shaft of the first motor 1 from rotating; when the first clutch 81 is disengaged, the output shaft of the first motor 1 is not connected to the braking end, that is, the output shaft of the first motor 1 can rotate at this time.

[0057] When the second clutch 82 is engaged, the third gear 53 and the second planetary carrier 46 are coaxially connected; when the second clutch 82 is disengaged, the third gear 53 and the second planetary carrier 46 are not coaxially connected.

[0058] When the third clutch 83 is engaged, the sixth gear 63 and the second planetary carrier 46 are coaxially connected; when the third clutch 83 is disengaged, the sixth gear 63 and the second planetary carrier 46 are not coaxially connected.

[0059] The controller is electrically connected to the first motor 1, the second motor 2, the engine 3, the differential 7, the first clutch 81, the second clutch 82, and the third clutch 83.

[0060] In this way, the controller can control the engagement or disengagement of the first clutch 81, the second clutch 82 and the third clutch 83 to combine the first motor 1, the second motor 2, the engine 3, the first transmission assembly 4, the second transmission assembly 5, the third transmission assembly 6 and the differential 7 into different power systems, thereby realizing different driving modes and thus realizing different speed adjustment ranges of the wheels 10, improving the diversity of driving modes of the hybrid power system.

[0061] In one possible implementation, see Figure 1 The hybrid power system also includes a power battery 91, which is electrically connected to the first motor 1, the second motor 2, and the controller.

[0062] In practice, the power battery 91 can supply power to the first motor 1, the second motor 2 and the controller, or it can recover electrical energy through the first motor 1 and the second motor 2.

[0063] In one possible implementation, see Figure 1 The hybrid power system also includes a first inverter 92 and a second inverter 93. The first inverter 92 is electrically connected to the first motor 1, the power battery 91 and the controller, and the second inverter 93 is electrically connected to the second motor 2, the power battery 91 and the controller.

[0064] In practice, when it is necessary to control the first motor 1 to work, the controller can control the first inverter 92 to convert the AC power output from the power battery 91 into DC power to supply power to the first motor 1 and make the first motor 1 start working. When it is necessary to control the second motor 2 to work, the controller can control the second inverter 93 to convert the AC power output from the power battery 91 into DC power to supply power to the second motor 2 and make the second motor 2 start working.

[0065] In one possible implementation, see Figure 2 Controller, used for:

[0066] When the vehicle is in pure electric drive mode, the second motor 2 is controlled to work, the first motor 1 and engine 3 are controlled to stop working, and the first clutch 81, the second clutch 82 and the third clutch 83 are controlled to disengage.

[0067] In practice, the power battery 91 supplies power to the second motor 2 through the second inverter 93, so that the second motor 2 can work. The output shaft of the second motor 2 drives the first gear 51, the second gear 52 and the fourth gear 61 to rotate in sequence, thereby driving the differential 7 and the vehicle wheels 10 to rotate, so as to achieve pure motor drive through the second motor 2.

[0068] Since the second clutch 82 is disengaged, the rotation of the second gear 52 will drive the rotation of the third gear 53, but the third gear 53 will not drive the rotation of the second planetary carrier 46.

[0069] In one possible implementation, see Figure 3 Controller, used for:

[0070] When the vehicle is in hybrid 1st gear drive mode, the first motor 1, the second motor 2 and the engine 3 are controlled to work, the third clutch 83 is controlled to engage, and the first clutch 81 and the second clutch 82 are controlled to disengage.

[0071] In practice, the output shaft of engine 3 rotates, which drives the first planetary carrier 43, the first planetary gear set 42, the ring gear 45, the second planetary gear set 44, and the second planetary carrier 46 to rotate in sequence. Since the third clutch 83 is engaged, the rotation of the second planetary carrier 46 can drive the sixth gear 63 to rotate. The rotation of the sixth gear 63 will drive the fifth gear 62 and the fourth gear 61 to rotate in sequence. The fourth gear 61 will drive the differential 7 and the vehicle wheels 10 to rotate.

[0072] During the rotation of the output shaft of engine 3, which drives the first planetary gear set 42 to rotate, the first planetary gear set 42 will also drive the first sun gear 41 to rotate. The first sun gear 41 drives the output shaft of the first motor 1 to rotate. The first motor 1 converts mechanical energy into electrical energy. The converted electrical energy can be used to power the battery 91 through the first inverter 92, or it can be used to power other devices on the vehicle.

[0073] The power battery 91 supplies power to the second motor 2 through the second inverter 93, so that the second motor 2 can work. The output shaft of the second motor 2 drives the first gear 51, the second gear 52 and the fourth gear 61 to rotate in sequence. The fourth gear 61 drives the differential 7 and the vehicle wheels 10 to rotate.

[0074] In this way, when the vehicle is in hybrid first gear drive mode, part of the mechanical energy output by engine 3 is used to drive the wheels 10 to rotate, and the other part of the mechanical energy is converted into electrical energy through the first motor 1 for charging. The second motor 2 can replenish energy for transient power response. In this way, the first motor 1, the second motor 2 and the engine 3 work together to drive the vehicle, and the speed and torque are decoupled from the wheels 10, ensuring that the vehicle can work in the high-efficiency range.

[0075] In one possible implementation, see Figure 4 Controller, used for:

[0076] When the vehicle is in hybrid 2-speed drive mode, the first motor 1, the second motor 2 and the engine 3 are controlled to work, the second clutch 82 is controlled to engage, and the first clutch 81 and the third clutch 83 are controlled to disengage.

[0077] In practice, the power battery 91 supplies power to the second motor 2 through the second inverter 93, so that the second motor 2 can work. The output shaft of the second motor 2 drives the first gear 51, the second gear 52 and the fourth gear 61 to rotate in sequence. The fourth gear 61 drives the differential 7 and the vehicle wheels 10 to rotate.

[0078] The rotation of the output shaft of engine 3 can drive the first planetary carrier 43, the first planetary gear set 42, the ring gear 45, the second planetary gear set 44, and the second planetary carrier 46 to rotate in sequence. Since the second clutch 82 is engaged, the rotation of the second planetary carrier 46 can drive the third gear 53 to rotate, the rotation of the third gear 53 will drive the second gear 52 to rotate, and the second gear 52 will drive the differential 7 and the vehicle wheels 10 to rotate.

[0079] In this way, the engine 3 can further provide driving force to the second gear 52 based on the second motor 2.

[0080] Furthermore, since the transmission ratio between the sixth gear 63 and the fifth gear 62 is less than the transmission ratio between the third gear 53 and the second gear 52, the hybrid 2-speed drive mode allows the vehicle to operate in a more efficient range than the hybrid 1-speed drive mode described above.

[0081] During the process of the output shaft of engine 3 rotating and driving the first planetary gear set 42 to rotate, the first planetary gear set 42 will also drive the first sun gear 41 to rotate. The first sun gear 41 drives the output shaft of the first motor 1 to rotate. The first motor 1 converts mechanical energy into electrical energy. The converted electrical energy can be used to power the power battery 91 through the first inverter 92, or it can also power other devices on the vehicle.

[0082] In this way, when the vehicle is in hybrid 2-speed drive mode, part of the mechanical energy output by the engine 3 is used to drive the wheels 10 to rotate, and the other part of the mechanical energy is converted into electrical energy through the first motor 1 for charging. The second motor 2 can replenish energy for transient power response. In this way, the first motor 1, the second motor 2 and the engine 3 work together to drive the vehicle, and the speed and torque are decoupled from the wheels 10, ensuring that the vehicle can work in a more efficient range.

[0083] In one possible implementation, see Figure 5Controller, used for:

[0084] When the vehicle is in engine 1st gear direct drive mode, it controls the second motor 2 and engine 3 to work, controls the first motor 1 to stop working, controls the first clutch 81 and the third clutch 83 to engage, and controls the second clutch 82 to disengage.

[0085] In practice, the output shaft of engine 3 rotates, which drives the first planetary carrier 43, the first planetary gear set 42, the ring gear 45, the second planetary gear set 44, and the second planetary carrier 46 to rotate in sequence. Since the third clutch 83 is engaged, the rotation of the second planetary carrier 46 can drive the sixth gear 63 to rotate. The rotation of the sixth gear 63 will drive the fifth gear 62 and the fourth gear 61 to rotate in sequence. The fourth gear 61 will drive the differential 7 and the vehicle wheels 10 to rotate.

[0086] The power battery 91 supplies power to the second motor 2 through the second inverter 93, so that the second motor 2 can work. The output shaft of the second motor 2 drives the first gear 51, the second gear 52 and the fourth gear 61 to rotate in sequence. The fourth gear 61 drives the differential 7 and the vehicle wheels 10 to rotate.

[0087] Because the first clutch 81 is engaged and the output shaft of the first motor 1 is coaxially connected with the first sun gear 41, the first planetary gear set 42 rotates but cannot drive the first sun gear 41 and the output shaft of the first motor 1 to rotate.

[0088] In this way, when the vehicle is in engine 1 direct drive mode, the mechanical energy output by engine 3 is used to drive the wheels 10 to rotate, and the second motor 2 can supplement energy for transient power response. In this way, the second motor 2 and engine 3 work together to drive the vehicle, and the speed and torque are decoupled from the wheels 10, ensuring that the vehicle can work in a more efficient range.

[0089] When the vehicle's operating conditions do not require high speed and the engine 3 can drive the wheels 10, a portion of the mechanical energy of the engine 3 is used to drive the wheels 10, and another portion of the mechanical energy can drive the output shaft of the second motor 2 to rotate through the fourth gear 61, the second gear 52, and the first gear 51. The second motor 2 converts the mechanical energy into electrical energy, which can then be used by the second inverter 93 to power the power battery 91, or to power other devices on the vehicle.

[0090] In one possible implementation, see Figure 6 Controller, used for:

[0091] When the vehicle is in engine 2nd gear direct drive mode, the second motor 2 and engine 3 are controlled to work, the first motor 1 is controlled to stop working, the first clutch 81 and the second clutch 82 are controlled to engage, and the third clutch 83 is controlled to disengage.

[0092] In practice, the output shaft of engine 3 rotates, which can drive the first planetary carrier 43, the first planetary gear set 42, the ring gear 45, the second planetary gear set 44, and the second planetary carrier 46 to rotate in sequence. Due to the second clutch 82, the rotation of the second planetary carrier 46 can drive the third gear 53 to rotate, the rotation of the third gear 53 will drive the second gear 52 to rotate, and the second gear 52 will drive the differential 7 and the vehicle wheels 10 to rotate.

[0093] The power battery 91 supplies power to the second motor 2 through the second inverter 93, so that the second motor 2 can work. The output shaft of the second motor 2 drives the first gear 51, the second gear 52 and the fourth gear 61 to rotate in sequence. The fourth gear 61 drives the differential 7 and the vehicle wheels 10 to rotate.

[0094] Because the first clutch 81 is engaged and the output shaft of the first motor 1 is coaxially connected with the first sun gear 41, the first planetary gear set 42 rotates but cannot drive the first sun gear 41 and the output shaft of the first motor 1 to rotate.

[0095] In this way, when the vehicle is in engine 2 direct drive mode, the mechanical energy output by engine 3 is used to drive the wheels 10 to rotate, and the second motor 2 can supplement energy for transient power response. In this way, the second motor 2 and engine 3 work together to drive the vehicle, and the speed and torque are decoupled from the wheels 10, ensuring that the vehicle can work in a more efficient range.

[0096] Furthermore, since the transmission ratio between the sixth gear 63 and the fifth gear 62 is less than the transmission ratio between the third gear 53 and the second gear 52, the engine's second-gear direct drive mode allows the vehicle to operate in a more efficient range than the engine's first-gear direct drive mode described above.

[0097] When the vehicle's operating conditions do not require high speed and the engine 3 can drive the wheels 10, a portion of the mechanical energy of the engine 3 is used to drive the wheels 10, and another portion of the mechanical energy can drive the output shaft of the second motor 2 to rotate through the fourth gear 61, the second gear 52, and the first gear 51. The second motor 2 converts the mechanical energy into electrical energy, which can then be used by the second inverter 93 to power the power battery 91, or to power other devices on the vehicle.

[0098] In one possible implementation, see Figure 7 Controller, used for:

[0099] When the vehicle is in energy recovery mode, the first motor 1, the second motor 2 and the engine 3 are stopped, and the first clutch 81, the second clutch 82 and the third clutch 83 are disengaged.

[0100] In practice, the rotation of wheel 10 can drive differential 7, fourth gear 1, second gear 52 and first gear 51 to rotate in sequence. The rotation of first gear 51 can drive the output shaft of second motor 2 to rotate. Second motor 2 converts mechanical energy into electrical energy, which can then charge power battery 91 through second inverter 93, or supply power to other devices on the vehicle, thereby realizing energy recovery.

[0101] This disclosure also provides a vehicle that includes any of the above-described hybrid power systems.

[0102] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0103] This disclosure provides a hybrid power system in which the controller can control the engagement or disengagement of the first clutch 81, the second clutch 82 and the third clutch 83 to combine the first motor 1, the second motor 2, the engine 3, the first transmission assembly 4, the second transmission assembly 5, the third transmission assembly 6 and the differential 7 into different power systems, thereby realizing different driving modes and improving the diversity of driving modes of the hybrid power system.

[0104] During vehicle start-up acceleration and low-speed phases, the electric motor's fast response and high torque at low speeds are utilized in pure electric drive mode, improving vehicle responsiveness and acceleration while avoiding frequent engine start-stop cycles in urban conditions, reducing energy loss and improving fuel economy. At medium and high speeds, engine 3 engages, using hybrid drive modes (including hybrid 1st gear and hybrid 2nd gear modes). The electric motor's power adjusts the engine's operating point, ensuring engine 3 always operates in its high-efficiency range, further improving fuel economy. Clutch slip-shifting ensures seamless power delivery, improving overall vehicle smoothness and meeting user comfort requirements.

[0105] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A hybrid power system, characterized in that, The hybrid power system includes a first motor (1), a second motor (2), an engine (3), a first transmission assembly (4), a second transmission assembly (5), a third transmission assembly (6), a differential (7), a drive assembly (8), and a controller; The first transmission assembly (4) includes a first sun gear (41), a first planetary gear set (42), a first planetary carrier (43), a second planetary gear set (44), a ring gear (45), a second planetary carrier (46), and a second sun gear (47) arranged coaxially. The first sun gear (41) is coaxially connected to the output shaft of the first motor (1). The first planetary gear set (42) meshes with the first sun gear (41). The first planetary carrier (43) engages with the first planetary gear set (42) and is coaxially connected to the output shaft of the engine (3). The ring gear (45) is sleeved around the outside of the first planetary gear set (42) and the second planetary gear set (44) and meshes with both the first planetary gear set (42) and the second planetary gear set (44). The second planetary carrier (46) engages with the second planetary gear set (44). The second sun gear (47) meshes with the second planetary gear set (44) and is coaxially connected to the output shaft of the engine (3). The second transmission assembly (5) includes a first gear (51), a second gear (52) and a third gear (53). The first gear (51) is coaxially connected to the output shaft of the second motor (2), and the second gear (52) meshes with the first gear (51) and the third gear (53) respectively. The third transmission assembly (6) includes a fourth gear (61), a fifth gear (62), and a sixth gear (63). The fourth gear (61), the fifth gear (62), and the second gear (52) are coaxially connected. The fourth gear (61) meshes with the input shaft of the differential (7). The output shaft of the differential (7) is used for transmission connection with the wheels (10) of the vehicle. The sixth gear (63) meshes with the fifth gear (62). The transmission ratio between the sixth gear (63) and the fifth gear (62) is less than the transmission ratio between the third gear (53) and the second gear (52). The drive assembly (8) includes a first clutch (81), a second clutch (82) and a third clutch (83). The first clutch (81) is used to engage or disengage the output shaft of the first motor (1) from the brake end. The second clutch (82) is used to engage or disengage the third gear (53) and the second planetary carrier (46). The third clutch (83) is used to engage or disengage the sixth gear (63) and the second planetary carrier (46). The controller is electrically connected to the first motor (1), the second motor (2), the engine (3), the differential (7), the first clutch (81), the second clutch (82), and the third clutch (83).

2. The hybrid power system according to claim 1, characterized in that, The controller is used for: When the vehicle is in pure electric drive mode, the second motor (2) is controlled to work, the first motor (1) and the engine (3) are controlled to stop working, and the first clutch (81), the second clutch (82) and the third clutch (83) are controlled to disengage.

3. The hybrid power system according to claim 1, characterized in that, The controller is used for: When the vehicle is in hybrid 1st gear drive mode, the first motor (1), the second motor (2) and the engine (3) are controlled to work, the third clutch (83) is controlled to engage, and the first clutch (81) and the second clutch (82) are controlled to disengage.

4. The hybrid power system according to claim 1, characterized in that, The controller is used for: When the vehicle is in hybrid 2-speed drive mode, the first motor (1), the second motor (2) and the engine (3) are controlled to work, the second clutch (82) is controlled to engage, and the first clutch (81) and the third clutch (83) are controlled to disengage.

5. The hybrid power system according to claim 1, characterized in that, The controller is used for: When the vehicle is in engine 1st gear direct drive mode, the second motor (2) and the engine (3) are controlled to work, the first motor (1) is controlled to stop working, the first clutch (81) and the third clutch (83) are controlled to engage, and the second clutch (82) is controlled to disengage.

6. The hybrid power system according to claim 1, characterized in that, The controller is used for: When the vehicle is in engine 2nd gear direct drive mode, the second motor (2) and the engine (3) are controlled to work, the first motor (1) is controlled to stop working, the first clutch (81) and the second clutch (82) are controlled to engage, and the third clutch (83) is controlled to disengage.

7. The hybrid power system according to claim 1, characterized in that, The controller is used for: When the vehicle is in energy recovery mode, the first motor (1), the second motor (2) and the engine (3) are controlled to stop working, and the first clutch (81), the second clutch (82) and the third clutch (83) are controlled to disengage.

8. The hybrid power system according to claim 1, characterized in that, The hybrid power system also includes a power battery (91), which is electrically connected to the first motor (1), the second motor (2), and the controller.

9. The hybrid power system according to claim 8, characterized in that, The hybrid power system further includes a first inverter (92) and a second inverter (93). The first inverter (92) is electrically connected to the first motor (1), the power battery (91), and the controller. The second inverter (93) is electrically connected to the second motor (2), the power battery (91), and the controller.

10. A vehicle, characterized in that, The vehicle includes a hybrid power system as described in any one of claims 1-9.

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