Hybrid power system and vehicle

Abstract

A hybrid power system and a vehicle. The hybrid power system comprises a first motor (1), a second motor (2), an engine (3), a differential (4), a wheel transmission assembly (5), a first planetary gear transmission assembly (6), a second planetary gear transmission assembly (7), a driving assembly (8) and a controller. The controller changes the transmission mode by controlling the first motor (1), the second motor (2), the engine (3), the differential (4) and the driving assembly (8), so as to adjust the rotation speed of wheels (100) of a vehicle, thereby satisfying different requirements of the vehicle in various working conditions.

Description

Hybrid powertrains and vehicles

[0001] This application claims priority to Chinese patent application No. 202311543734X, filed on November 15, 2023, with invention name “Hybrid System and Vehicle,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of vehicle technology, and in particular to a hybrid power system and a vehicle. Background Art

[0003] Among current hybrid vehicles, hybrid systems are widely favored because they can significantly improve the power and fuel economy of the vehicle and reduce emissions.

[0004] Most of the current hybrid systems are developed based on traditional automatic transmissions, which simply integrate the motor and engine at the front or rear end of the transmission.

[0005] Although the above hybrid system can achieve power transmission, its simple structure and low transmission efficiency result in a relatively single working mode, which cannot meet the different needs of the vehicle under various working conditions.

[0006] Summary of the Invention

[0007] The present disclosure provides a hybrid power system and vehicle that can meet the different requirements of the vehicle under various operating conditions. The technical solutions are as follows:

[0008] In one aspect, an embodiment of the present disclosure provides a hybrid powertrain system, comprising a first motor, a second motor, an engine, a differential, a wheel transmission assembly, a first planetary gear transmission assembly, a second planetary gear transmission assembly, a drive assembly, and a controller;

[0009] The wheel transmission assembly is drivingly connected to the input shaft of the differential, and the output shaft of the differential is used to be drivingly connected to the wheels of the vehicle;

[0010] The first planetary gear transmission assembly is in transmission connection with the wheel transmission assembly;

[0011] The second planetary gear transmission assembly is in transmission connection with the second motor, the engine, and the first planetary gear transmission assembly;

[0012] The drive assembly is connected to the first motor, the wheel transmission assembly, the first planetary gear transmission assembly and the brake end;

[0013] The controller is electrically connected to the first motor, the second motor, the engine, the differential, and the drive assembly.

[0014] In one possible implementation, the wheel transmission assembly includes a first gear, a second gear, and a third gear, wherein the first gear cooperates with the output shaft of the first motor and meshes with the second gear, the second gear is coaxially connected to the third gear, and the third gear meshes with the input shaft of the differential;

[0015] The first planetary gear transmission assembly includes a first sun gear, a first planetary gear set, a first planet carrier and a first ring gear. The first sun gear, the first planet carrier and the first gear are coaxially connected. The first planetary gear set cooperates with the first planet carrier and meshes with the first sun gear. The first ring gear is used to cooperate with the brake end.

[0016] The second planetary gear transmission assembly includes a second sun gear, a second planetary gear set, a second planet carrier and a second ring gear, the second sun gear is coaxially connected to the output shaft of the second motor and meshes with the second planetary gear set, the second planetary gear set is coaxially connected to the second planet carrier, the second planet carrier is coaxially connected to the output shaft of the engine, and the second ring gear is meshed with the second planetary gear set and coaxially connected to the first planetary gear set;

[0017] The drive assembly includes a first clutch, a second clutch, and a third clutch, wherein the first clutch is used to connect or disconnect the first gear and the output shaft of the first motor, the second clutch is used to connect or disconnect the first planetary gear set and the first planetary carrier, and the third clutch is used to connect or disconnect the first ring gear and the brake end;

[0018] The controller is electrically connected to the first clutch, the second clutch, and the third clutch.

[0019] In a possible implementation, the controller is configured to:

[0020] When the vehicle is in a starting mode or a low-speed driving mode, if the vehicle speed is lower than a first speed threshold, the first motor is controlled to operate, the second motor and the engine are controlled to stop operating, the first clutch is controlled to engage, and the second clutch and the third clutch are controlled to disengage, so that the first motor drives the wheels of the vehicle to rotate.

[0021] In a possible implementation, the controller is configured to:

[0022] When the vehicle is in a starting mode or a low-speed driving mode, if the vehicle speed is not lower than a first speed threshold and lower than a second speed threshold, the first motor and the second motor are controlled to operate, the engine is controlled to stop, the first clutch and the second clutch are controlled to engage, and the third clutch is controlled to disengage, so that the first motor and the second motor jointly drive the wheels of the vehicle to rotate.

[0023] In a possible implementation, the controller is configured to:

[0024] When the vehicle is in a starting mode or a low-speed driving mode, if the vehicle speed is not lower than a second speed threshold and lower than a third speed threshold, the first motor and the second motor are controlled to operate, the engine is controlled to stop, the first clutch and the third clutch are controlled to engage, and the second clutch is controlled to disengage, so that the first motor and the second motor jointly drive the wheels of the vehicle to rotate.

[0025] In a possible implementation, the controller is configured to:

[0026] When the vehicle is in a medium-speed driving mode or a high-speed driving mode, if the vehicle speed is not lower than a third speed threshold and lower than a fourth speed threshold, the first motor, the second motor and the engine are controlled to operate, the first clutch and the second clutch are controlled to engage, and the third clutch is controlled to disengage, so that the first motor, the second motor and the engine jointly drive the wheels of the vehicle to rotate.

[0027] In a possible implementation, the controller is configured to:

[0028] When the vehicle is in a medium-speed driving mode or a high-speed driving mode, if the vehicle speed is not lower than a fourth speed threshold and lower than a fifth speed threshold, the first motor, the second motor and the engine are controlled to operate, the first clutch and the third clutch are controlled to engage, and the second clutch is controlled to disengage, so that the first motor, the second motor and the engine jointly drive the wheels of the vehicle to rotate.

[0029] In a possible implementation, the controller is configured to:

[0030] When the vehicle is in a coasting mode or a braking energy recovery mode, the first motor, the second motor and the engine are controlled to stop working, the first clutch is controlled to engage, and the second clutch and the third clutch are controlled to disengage, so as to recover energy through the first motor.

[0031] In a possible implementation, the controller is configured to:

[0032] When the vehicle is in a coasting mode or a braking energy recovery mode, the first motor, the second motor and the engine are controlled to stop working, the first clutch and the second clutch are controlled to engage, and the third clutch is controlled to disengage, so as to recover energy through the first motor and the second motor.

[0033] In a possible implementation, the hybrid power system further includes a power battery, a first inverter, and a second inverter;

[0034] The power battery is electrically connected to the first inverter and the second inverter. The first inverter is electrically connected to the first motor and the controller. The second inverter is electrically connected to the second motor and the controller.

[0035] On the other hand, an embodiment of the present disclosure provides a vehicle, comprising a hybrid power system as described in any one of the above.

[0036] The technical solutions provided by the embodiments of the present disclosure include at least the following beneficial effects:

[0037] An embodiment of the present disclosure provides a hybrid power system, in which a controller can change the transmission mode by controlling the first motor, the second motor, the engine, the differential, and the drive assembly, thereby adjusting the wheel speed of the vehicle to meet different requirements of the vehicle in various working conditions.

[0038] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] FIG1 is a schematic structural diagram of a hybrid power system according to an embodiment of the present disclosure;

[0041] FIG2 is a transmission diagram of a hybrid power system in a 10-speed driving mode of a pure electric single motor, shown in an embodiment of the present disclosure;

[0042] FIG3 is a transmission diagram of a hybrid power system in an 11-speed driving mode of a pure electric dual-motor system according to an embodiment of the present disclosure;

[0043] FIG4 is a transmission diagram of a hybrid power system in a pure electric dual-motor 12-speed driving mode according to an embodiment of the present disclosure;

[0044] FIG5 is a transmission diagram of a hybrid power system in a parallel hybrid 11-speed driving mode, shown in an embodiment of the present disclosure;

[0045] FIG6 is a transmission schematic diagram of a hybrid power system in a parallel hybrid energy recovery mode, shown in an embodiment of the present disclosure;

[0046] FIG7 is a transmission diagram of a hybrid power system in a parallel hybrid 12-speed driving mode, shown in an embodiment of the present disclosure;

[0047] FIG8 is a transmission schematic diagram of a hybrid power system in a parallel hybrid energy recovery mode, shown in an embodiment of the present disclosure;

[0048] FIG9 is a transmission schematic diagram of a hybrid power system in an energy recovery mode according to an embodiment of the present disclosure.

[0049] Legend: 1. First motor; 2. Second motor; 3. Engine; 4. Differential; 5. Wheel drive assembly; 6. First planetary gear drive assembly; 7. Second planetary gear drive assembly; 8. Drive assembly; 9. Power battery; 10. First inverter; 11. Second inverter; 51. First gear; 52. Second gear; 53. Third gear; 61. First sun gear; 62. First planetary gear set; 63. First planetary carrier; 64. First ring gear; 71. Second sun gear; 72. Second planetary gear set; 73. Second planetary carrier; 74. Second ring gear; 81. First clutch; 82. Second clutch; 83. Third clutch; 100. Wheel; 200. Brake end. DETAILED DESCRIPTION

[0050] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0051] An embodiment of the present disclosure provides a hybrid power system, as shown in Figure 1, which includes a first motor 1, a second motor 2, an engine 3, a differential 4, a wheel transmission assembly 5, a first planetary gear transmission assembly 6, a second planetary gear transmission assembly 7, a drive assembly 8 and a controller (not shown in the figure).

[0052] The first motor 1 , the second motor 2 and the engine 3 can all drive the wheels 100 of the vehicle to rotate, providing output torque for the rotation of the wheels 100 .

[0053] The wheel drive assembly 5 is drivingly connected to the input shaft of the differential 4, and the output shaft of the differential 4 is drivingly connected to the vehicle's wheels 100. A first planetary gear transmission assembly 6 is drivingly connected to the wheel drive assembly 5. A second planetary gear transmission assembly 7 is drivingly connected to the second motor 2, the engine 3, and the first planetary gear transmission assembly 6. A drive assembly 8 is connected to the first motor 1, the wheel drive assembly 5, the first planetary gear transmission assembly 6, and the brake end 200. A controller is electrically connected to the first motor 1, the second motor 2, the engine 3, the differential 4, and the drive assembly 8.

[0054] The controller can realize the transmission connection structure between the first motor 1, the second motor 2 and the engine 3 and the input shaft of the differential 4 by controlling whether the first motor 1, the second motor 2 and the engine 3 are working, and controlling the working status of the differential 4 and the drive component 8, thereby transmitting different driving forces to the wheels 100 with different transmission ratios to realize different driving modes of the hybrid power system, thereby realizing different requirements of various working conditions of the vehicle.

[0055] The structures of the wheel transmission assembly 5, the first planetary gear transmission assembly 6, the second planetary gear transmission assembly 7, and the drive assembly 8 in the hybrid system are described in more detail below:

[0056] As shown in Figure 1, the wheel transmission assembly 5 includes a first gear 51, a second gear 52 and a third gear 53. The first gear 51 cooperates with the output shaft of the first motor 1 and meshes with the second gear 52. The second gear 52 is coaxially connected to the third gear 53. The third gear 53 meshes with the input shaft of the differential 4. The output shaft of the differential 4 is used for transmission connection with the wheel 100 of the vehicle.

[0057] It can be understood that the “matching” in the embodiment of the present disclosure means that the driving assembly 8 to be described later can achieve coaxial connection or non-coaxial connection.

[0058] It can be understood that the coaxial connection in the embodiment of the present disclosure can achieve simultaneous rotation in the same direction and at the same speed, or simultaneous stoppage of rotation. For example, the above-mentioned second gear 52 is coaxially connected to the third gear 53, that is, when the second gear 52 rotates, it will drive the third gear 53 to rotate in the same direction and at the same speed. When the second gear 52 stops rotating, the third gear 53 also stops rotating at the same time.

[0059] The wheel transmission assembly 5 can realize the transmission connection between the wheel 100 and the output shaft of the first motor 1, the output shaft of the second motor 2, and the output shaft of the engine 3 through various devices, so that the first motor 1, the second motor 2 and the engine 3 can drive the wheel 100 to rotate through the wheel transmission assembly 5.

[0060] The first planetary gear transmission assembly 6 includes a first sun gear 61, a first planetary gear set 62, a first planetary carrier 63 and a first ring gear 64. The first sun gear 61, the first planetary carrier 63 and the first gear 51 are all coaxially connected. The first planetary gear set 62 cooperates with the first planetary carrier 63 and meshes with the first sun gear 61. The first ring gear 64 is used to cooperate with the braking end 200.

[0061] The braking end 200 may be any non-rotating device on the vehicle, for example, any position on the vehicle frame, etc., and the embodiments of the present disclosure do not limit this.

[0062] The second planetary gear transmission assembly 7 includes a second sun gear 71, a second planetary gear set 72, a second planetary carrier 73 and a second ring gear 74. The second sun gear 71 is coaxially connected to the output shaft of the second motor 2 and meshes with the second planetary gear set 72. The second planetary gear set 72 is coaxially connected to the second planetary carrier 73. The second planetary carrier 73 is coaxially connected to the output shaft of the engine 3. The second ring gear 74 is meshed with the second planetary gear set 72 and coaxially connected to the first planetary gear set 62.

[0063] The first planetary gear transmission assembly 6 and the second planetary gear transmission assembly 7 can realize the transmission connection between the wheel transmission assembly 5 and the output shaft of the second motor 2 and the output shaft of the engine 3, that is, the second motor 2 and the engine 3 can drive the wheel 100 to rotate through the first planetary gear transmission assembly 6, the second planetary gear transmission assembly 7 and the wheel transmission assembly 5.

[0064] 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 connect or disconnect the first gear 51 and the output shaft of the first motor 1, the second clutch 82 is used to connect or disconnect the first planetary gear set 62 and the first planetary carrier 63, and the third clutch 83 is used to connect or disconnect the first ring gear 64 and the braking end 200.

[0065] The driving component 8 can realize different driving modes of the hybrid power system through its own different states, thereby meeting the different requirements of various working conditions of the vehicle.

[0066] When the first clutch 81 is engaged, the first gear 51 is coaxially connected to the output shaft of the first motor 1. When the first clutch 81 is disengaged, the first gear 51 is not coaxially connected to the output shaft of the first motor 1, that is, when the first gear 51 rotates, it will not drive the output shaft of the first motor 1 to rotate, and when the output shaft of the first motor 1 rotates, it will not drive the first gear 51 to rotate.

[0067] When the second clutch 82 is engaged, the first planetary gear set 62 is coaxially connected to the first planetary carrier 63. Since the first planetary carrier 63 is coaxially connected to the first gear 51 and the first sun gear 61, the first planetary gear set 62 is coaxially connected to the first planetary carrier 63, the first gear 51, and the first sun gear 61. When the second clutch 82 is disengaged, the first planetary gear set 62 is not coaxially connected to the first planetary carrier 63.

[0068] When the third clutch 83 is engaged, the first ring gear 64 is coaxially connected to the braking end 200. Since the braking end 200 cannot rotate, the first ring gear 64 will not rotate. When the third clutch 83 is disengaged, the first ring gear 64 is not coaxially connected to the braking end 200. At this time, the first ring gear 64 can rotate.

[0069] The controller is electrically connected to the first motor 1, the second motor 2, the engine 3, the differential 4, the first clutch 81, the second clutch 82, and the third clutch 83. The controller can achieve different driving modes of the hybrid system by controlling the states of the first motor 1, the second motor 2, the engine 3, the differential 4, the first clutch 81, the second clutch 82, and the third clutch 83, thereby achieving different speeds of the wheel 100, and further achieving different speed requirements of the vehicle under various working conditions.

[0070] In one possible implementation, the hybrid power system also includes a power battery 9, a first inverter 10 and a second inverter 11. The power battery 9 is electrically connected to the first inverter 10 and the second inverter 11. The first inverter 10 is electrically connected to the first motor 1 and the control. The second inverter 11 is electrically connected to the second motor 2 and the control.

[0071] In this way, when it is necessary to control the first motor 1 to work, the controller can control the first inverter 10 to convert the AC power output by the power battery 9 into DC power to power the first motor 1, so that the first motor 1 starts working. When it is necessary to control the second motor 2 to work, the controller can control the second inverter 11 to convert the AC power output by the power battery 9 into DC power to power the second motor 2, so that the second motor 2 starts working.

[0072] The following describes several driving modes that can be achieved by the hybrid system in the embodiments of the present disclosure:

[0073] 1. 10-speed drive mode for a pure electric single motor

[0074] As shown in Figure 2, the controller is used to: when the vehicle is in starting mode or low-speed driving mode, if the vehicle speed is lower than a first speed threshold, control the first motor 1 to work, control the second motor 2 and the engine 3 to stop working, control the first clutch 81 to engage, and control the second clutch 82 and the third clutch 83 to disengage, so that the first motor 1 drives the vehicle's wheels 100 to rotate.

[0075] In implementation, when the controller controls the first motor 1 to work, controls the second motor 2 and the engine 3 to stop working, controls the first clutch 81 to engage, and controls the second clutch 82 and the third clutch 83 to separate, see the dotted arrow in Figure 2, the power battery 9 starts to power the first motor 1 through the first inverter 10.

[0076] Then, referring to the solid arrow in Figure 2, after the first motor 1 is powered on, the output shaft of the first motor 1 will drive the first gear 51 to rotate, and the first gear 51 will in turn drive the second gear 52, the third gear 53, the differential 4, and the wheel 100 to rotate, thereby realizing a pure electric single-motor driving mode.

[0077] Among them, the first vehicle speed threshold can be any reasonable value and can be set according to needs and actual conditions of the vehicle. This embodiment of the present disclosure does not limit this.

[0078] 2. 11-speed driving mode of pure electric dual motor

[0079] As shown in Figure 3, the controller is used to: when the vehicle is in starting mode or low-speed driving mode, if the vehicle speed is not lower than the first speed threshold and lower than the second speed threshold, control the first motor 1 and the second motor 2 to operate, control the engine 3 to stop working, control the first clutch 81 and the second clutch 82 to engage, and control the third clutch 83 to disengage, so that the first motor 1 and the second motor 2 jointly drive the vehicle's wheels 100 to rotate.

[0080] In implementation, when the controller controls the first motor 1 and the second motor 2 to work, controls the engine 3 to stop working, controls the first clutch 81 and the second clutch 82 to engage, and controls the third clutch 83 to separate, see the dotted arrows in Figure 3, the power battery 9 starts to power the first motor 1 through the first inverter 10, and starts to power the second motor 2 through the second inverter 11.

[0081] Then, referring to the solid arrows in Figure 3 , when the first motor 1 is powered on, its output shaft drives the first gear 51, which in turn drives the second gear 52, the third gear 53, the differential 4, and the wheels 100, thereby driving the first motor 1. Furthermore, when the second motor 2 is powered on, its output shaft drives the second sun gear 71, which in turn drives the second planetary gear set 72, the second ring gear 74, the first planetary gear set 62, the first planet carrier 63, the first gear 51, the second gear 52, the third gear 53, the differential 4, and the wheels 100, thereby driving the second motor 2.

[0082] As described above, the first motor 1 and the second motor 2 can jointly drive the wheel 100, thereby realizing an 11-speed driving mode of a pure electric dual motor, improving the output torque, and achieving a faster driving speed than the 10-speed driving mode of a pure electric single motor.

[0083] Among them, the second vehicle speed threshold can be any reasonable value that is greater than the first vehicle speed threshold, and can be set according to needs and the actual situation of the vehicle. This embodiment of the present disclosure does not limit this.

[0084] It should be noted that, in the above process, the second ring gear 74 , the first planetary gear set 62 , and the first planetary carrier 63 are all coaxially connected to achieve the same rotational speed.

[0085] 3. 12-speed driving mode of pure electric dual motor

[0086] As shown in FIG4 , the controller is used to: when the vehicle is in starting mode or low-speed driving mode, if the vehicle speed is not lower than the second speed threshold and lower than the third speed threshold, control the first motor 1 and the second motor 2 to operate, control the engine 3 to stop operating, control the first clutch 81 and the third clutch 83 to engage, and control the second clutch 82 to disengage, so that the first motor 1 and the second motor 2 jointly drive the vehicle's wheels 100 to rotate.

[0087] In implementation, when the controller controls the first motor 1 and the second motor 2 to work, controls the engine 3 to stop working, controls the first clutch 81 and the third clutch 83 to engage, and controls the second clutch 82 to disengage, see the dotted arrows in Figure 4, the power battery 9 starts to power the first motor 1 through the first inverter 10, and starts to power the second motor 2 through the second inverter 11.

[0088] Then, referring to the solid arrows in Figure 4 , after the first motor 1 is powered on, the output shaft of the first motor 1 drives the first gear 51 to rotate, and the first gear 51 in turn drives the second gear 52, the third gear 53, the differential 4, and the wheel 100 to rotate, thereby driving the first motor 1. On the other hand, after the second motor 2 is powered on, the output shaft of the second motor 2 will drive the second sun gear 71 to rotate, and the second sun gear 71 will in turn drive the second planetary gear set 72, the second ring gear 74, and the first planetary gear set 62 to rotate. Since the third clutch 83 is engaged, the first ring gear 64 cannot rotate. Therefore, the rotation of the first planetary gear set 62 will drive the first sun gear 61 and the first planetary carrier 63 to rotate, and the transmission ratio between the second ring gear 74 and the first sun gear 61 is less than 1, that is, the speed of the first sun gear 61 is greater than the speed of the second ring gear 74, that is, the speed of the first planetary carrier 63 is greater than the speed of the second ring gear 74. Then, the first planetary carrier 63 drives the first gear 51, the second gear 52, the third gear 53, the differential 4, and the wheel 100 to rotate, thereby realizing the driving of the second motor 2.

[0089] From the above, the first motor 1 and the second motor 2 can jointly drive the wheel 100, thereby realizing a 12-speed driving mode of a pure electric dual motor, improving the output torque, and achieving a faster driving speed than the 11-speed driving mode of a pure electric dual motor.

[0090] Among them, the third vehicle speed threshold can be any reasonable value that is greater than the second vehicle speed threshold, and can be set according to needs and the actual situation of the vehicle. The embodiment of the present disclosure does not limit this.

[0091] It should be noted that in the above process, since the rotational speed of the first planetary carrier 63 is greater than the rotational speed of the second ring gear 74, the driving speed of the second motor 1 to the wheel 100 can be greater than the driving speed of the second motor 2 to the wheel 100 in the 11-speed driving mode of the pure electric dual motor, thereby realizing the 12-speed driving mode of the pure electric dual motor.

[0092] 4. Parallel Hybrid 11-speed Drive Mode

[0093] As shown in Figure 5, the controller is used to: when the vehicle is in medium-speed driving mode or high-speed driving mode, if the vehicle speed is not lower than the third speed threshold and lower than the fourth speed threshold, control the first motor 1, the second motor 2 and the engine 3 to operate, control the first clutch 81 and the second clutch 82 to engage, and control the third clutch 83 to disengage, so that the first motor 1, the second motor 2 and the engine 3 jointly drive the vehicle's wheels 100 to rotate.

[0094] In implementation, when the controller controls the first motor 1, the second motor 2 and the engine 3 to operate, controls the first clutch 81 and the second clutch 82 to engage, and controls the third clutch 83 to separate, see the dotted arrows in Figure 5, the power battery 9 starts to supply power to the first motor 1 through the first inverter 10, and starts to supply power to the second motor 2 through the second inverter 11.

[0095] Then, see the solid arrows in Figure 5. On the one hand, after the first motor 1 is powered on, the output shaft of the first motor 1 drives the first gear 51 to rotate, which in turn drives the second gear 52, the third gear 53, the differential 4, and the wheels 100 to rotate, thereby driving the first motor 1. On the other hand, after the second motor 2 is powered on, the output shaft of the second motor 2 and the output shaft of the engine 3 jointly drive the second sun gear 71 to rotate, which in turn drives the second planetary gear set 72, the second ring gear 74, the first planetary gear set 62, the first planetary carrier 63, the first gear 51, the second gear 52, the third gear 53, the differential 4, and the wheels 100 to rotate, thereby driving the second motor 2 and the engine 3.

[0096] From the above, the first motor 1, the second motor 2 and the engine 3 can jointly drive the wheel 100, thereby realizing an 11-speed driving mode of parallel hybrid of the motor (including the first motor 1 and the second motor 2) and the engine 3, improving the output torque, and achieving a faster driving speed than the 12-speed driving mode of the pure electric dual motor.

[0097] Among them, the fourth vehicle speed threshold can be any reasonable value that is greater than the third vehicle speed threshold, and can be set according to needs and the actual situation of the vehicle. The embodiment of the present disclosure does not limit this.

[0098] It should be noted that, in the above process, the second ring gear 74 , the first planetary gear set 62 , and the first planetary carrier 63 are all coaxially connected to achieve the same rotational speed.

[0099] In one possible implementation, as shown in FIG6 , if the required torque of the wheel 100 is low and the first motor 1 and the engine 3 can fully provide the required torque, the driving mode of the vehicle may be: the controller controls the first motor 1 and the engine 3 to operate, controls the first clutch 81 and the second clutch 82 to engage, and controls the third clutch 83 to disengage.

[0100] In implementation, when the controller controls the first motor 1 and the engine 3 to work, controls the first clutch 81 and the second clutch 82 to engage, and controls the third clutch 83 to disengage, see the dotted arrow in Figure 6, the power battery 9 only supplies power to the first motor 1 through the first inverter 10.

[0101] Then, see the solid arrows in Figure 6. On the one hand, after first motor 1 is powered on, its output shaft drives first gear 51, which in turn drives second gear 52, third gear 53, differential 4, and wheels 100, thereby driving first motor 1. On the other hand, the output shaft of engine 3 drives second sun gear 71, which in turn drives second planetary gear set 72, second ring gear 74, first planetary gear set 62, first planet carrier 63, first gear 51, second gear 52, third gear 53, differential 4, and wheels 100, thereby driving engine 3.

[0102] When the sum of the output torque of the engine 3 acting on the wheel 100 and the output torque of the first motor 1 acting on the wheel 100 is greater than the required torque of the wheel 100, the excess output torque of the engine 3 can be transmitted to the output shaft of the second motor 2 through the second sun gear 71, see the dotted arrow in Figure 6, the engine 3 transmits the excess mechanical energy to the output shaft of the second motor 2 through the second sun gear 71, so that the second motor 2 converts the received mechanical energy into electrical energy, and the converted electrical energy can be used to power the first motor 1 or charge the power battery 9, etc., thereby realizing energy recovery through the second motor 2.

[0103] 5. Parallel Hybrid 12-speed Drive Mode

[0104] As shown in Figure 7, the controller is used to: when the vehicle is in medium-speed driving mode or high-speed driving mode, if the vehicle speed is not lower than the fourth speed threshold and lower than the fifth speed threshold, control the first motor 1, the second motor 2 and the engine 3 to operate, control the first clutch 81 and the third clutch 83 to engage, and control the second clutch 82 to disengage, so that the first motor 1, the second motor 2 and the engine 3 jointly drive the vehicle's wheels 100 to rotate.

[0105] In implementation, after the gear controller controls the operation of the first motor 1, the second motor 2 and the engine 3, controls the engagement of the first clutch 81 and the third clutch 83, and controls the separation of the second clutch 82, see the dotted arrows in Figure 7, the power battery 9 starts to supply power to the first motor 1 through the first inverter 10, and starts to supply power to the second motor 2 through the second inverter 11.

[0106] Then, referring to the implementation arrows in Figure 7 , after the first motor 1 is powered on, the output shaft of the first motor 1 drives the first gear 51 to rotate, and the first gear 51 in turn drives the second gear 52, the third gear 53, the differential 4, and the wheel 100 to rotate, thereby realizing the drive of the first motor 1. On the other hand, after the second motor 2 is powered on, the output shaft of the second motor 2 and the output shaft of the engine 3 will jointly drive the second sun gear 71 to rotate, and the second sun gear 71 will in turn drive the second planetary gear set 72, the second ring gear 74, and the first planetary gear set 62 to rotate. Since the third clutch 83 is engaged, the first ring gear 64 cannot rotate. Therefore, the rotation of the first planetary gear set 62 will drive the first sun gear 61 and the first planetary carrier 63 to rotate, and the transmission ratio between the second ring gear 74 and the first sun gear 61 is less than 1, that is, the speed of the first sun gear 61 is greater than the speed of the second ring gear 74, that is, the speed of the first planetary carrier 63 is greater than the speed of the second ring gear 74. Then, the first planetary carrier 63 drives the first gear 51, the second gear 52, the third gear 53, the differential 4, and the wheel 100 to rotate, thereby realizing the driving of the second motor 2 and the engine 3.

[0107] From the above, the first motor 1, the second motor 2 and the engine 3 can jointly drive the wheel 100, thereby realizing a 12-speed drive mode of a parallel hybrid of the motor (including the first motor 1 and the second motor 2) and the engine 3, improving the output torque, and achieving a faster drive than the 11-speed drive mode of the parallel hybrid.

[0108] Among them, the fifth vehicle speed threshold can be any reasonable value that is greater than the fourth vehicle speed threshold, and can be set according to needs and the actual situation of the vehicle. The embodiment of the present disclosure does not limit this.

[0109] It should be noted that in the above process, since the rotational speed of the first planetary carrier 63 is greater than the rotational speed of the second ring gear 74, the common driving speed of the second motor 1 and the engine 3 for the wheel 100 can be greater than the common driving speed of the second motor 2 and the engine 3 for the wheel 100 in the 11-speed driving mode of the parallel hybrid, thereby realizing the 12-speed driving mode of the parallel hybrid.

[0110] In one possible implementation, as shown in FIG8 , if the required torque of the wheel 100 is low and the first motor 1 and the engine 3 can fully provide the required torque, the driving mode of the vehicle may be: the controller controls the first motor 1 and the engine 3 to operate, controls the first clutch 81 and the third clutch 83 to engage, and controls the second clutch 82 to disengage.

[0111] In implementation, when the controller controls the first motor 1 and the engine 3 to work, controls the first clutch 81 and the third clutch 83 to engage, and controls the second clutch 82 to disengage, see the dotted arrow in Figure 8, the power battery 9 only supplies power to the first motor 1 through the first inverter 10.

[0112] Then, referring to the solid arrows in Figure 8 , after first motor 1 is powered on, its output shaft drives first gear 51, which in turn drives second gear 52, third gear 53, differential 4, and wheels 100, thereby driving first motor 1. Furthermore, the output shaft of engine 3 drives second sun gear 71, which in turn drives second planetary gear set 72, second ring gear 74, and first planetary gear set 62. The rotation of first planetary gear set 62 drives first sun gear 61 and first planet carrier 63, with the transmission ratio between second ring gear 74 and first sun gear 61 being less than 1. The first planet carrier 63 then drives first gear 51, second gear 52, third gear 53, differential 4, and wheels 100, thereby driving engine 3.

[0113] When the sum of the output torque of the engine 3 acting on the wheel 100 and the output torque of the first motor 1 acting on the wheel 100 is greater than the required torque of the wheel 100, the excess output torque of the engine 3 can be transmitted to the output shaft of the second motor 2 through the second sun gear 71, see the dotted arrow in Figure 8, the engine 3 transmits the excess mechanical energy to the output shaft of the second motor 2 through the second sun gear 71, so that the second motor 2 converts the received mechanical energy into electrical energy, and the converted electrical energy can be used to power the first motor 1 or charge the power battery 9, etc., thereby realizing energy recovery through the second motor 2.

[0114] 6. Energy Recovery Mode

[0115] As shown in Figure 9, the controller is used to: when the vehicle is in coasting mode or brake energy recovery mode, control the first motor 1, the second motor 2 and the engine 3 to stop working, control the first clutch 81 to engage, and control the second clutch 82 and the third clutch 83 to disengage, so as to recover energy through the first motor 1.

[0116] In implementation, referring to the solid arrow in FIG9 , when the vehicle is in the gliding mode or the braking energy recovery mode, the rotation of the wheel 100 will sequentially drive the differential 4, the third gear 53, the second gear 52, the first gear 51, and the output shaft of the first motor 1 to rotate, that is, the wheel 100 transfers mechanical energy to the output shaft of the first motor 1.

[0117] Then, referring to the dotted arrow in FIG9 , the first motor 1 converts the received mechanical energy into electrical energy, and transmits it to the power battery 9 through the first inverter 10 to charge the power battery 9 , thereby realizing energy recovery through the first motor 1 .

[0118] In the above-mentioned parallel hybrid 11-speed drive mode and parallel hybrid 12-speed drive mode, the engine 3 and the second motor 2 achieve stepless speed regulation through the second planetary gear transmission assembly 7, and the speed of the engine 3 is decoupled from the wheels 100, so that the engine 3 can operate in a high-efficiency range, thereby improving the overall performance of the engine 3.

[0119] Furthermore, as can be seen from the various drive modes described above, the hybrid system in the disclosed embodiment enables the vehicle to operate in a pure electric drive mode in starting mode and low-speed driving mode. This not only utilizes the motor's fast response and high torque at low speed to improve power, but also avoids energy loss from frequent starting and stopping of engine 3, thereby improving fuel efficiency. The hybrid system in the disclosed embodiment also enables the vehicle to operate in a high-efficiency range in medium-speed and high-speed driving modes, allowing engine 3 to operate in a high-efficiency range and improving its overall performance.

[0120] The hybrid power system in the embodiment of the present disclosure has a compact structure and can realize multiple driving modes. The above is only a detailed introduction to several of the driving modes. The embodiment of the present disclosure does not specifically limit other driving modes that can be realized by the hybrid power system.

[0121] An embodiment of the present disclosure also provides a vehicle, which includes any of the hybrid power systems described above.

[0122] The technical solutions provided by the embodiments of the present disclosure include at least the following beneficial effects:

[0123] The embodiment of the present disclosure provides a hybrid power system, in which the controller can change the transmission mode by controlling the first motor 1, the second motor 2, the engine 3, the differential 4, and the drive assembly 8, thereby adjusting the rotation speed of the vehicle's wheels 100 to meet the different needs of the vehicle in various working conditions.

[0124] The above description is merely an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A hybrid power system, characterized in that: The hybrid power system comprises a first motor (1), a second motor (2), an engine (3), a differential (4), a wheel transmission assembly (5), a first planetary gear transmission assembly (6), a second planetary gear transmission assembly (7), a drive assembly (8) and a controller; The wheel transmission assembly (5) is drivingly connected to the input shaft of the differential (4), and the output shaft of the differential (4) is used for drivingly connecting to the wheel (100) of the vehicle; The first planetary gear transmission assembly (6) is transmission-connected to the wheel transmission assembly (5); The second planetary gear transmission assembly (7) is transmission-connected to the second motor (2), the engine (3), and the first planetary gear transmission assembly (6); The driving assembly (8) is connected to the first motor (1), the wheel transmission assembly (5), the first planetary gear transmission assembly (6) and the brake end (200); The controller is electrically connected to the first motor (1), the second motor (2), the engine (3), the differential (4), and the drive assembly (8).

2. The hybrid power system according to claim 1, characterized in that: The wheel transmission assembly (5) comprises a first gear (51), a second gear (52) and a third gear (53), the first gear (51) matches the output shaft of the first motor (1) and meshes with the second gear (52), the second gear (52) is coaxially connected with the third gear (53), and the third gear (53) meshes with the input shaft of the differential (4); The first planetary gear transmission assembly (6) comprises a first sun gear (61), a first planetary gear set (62), a first planet carrier (63) and a first ring gear (64); the first sun gear (61), the first planet carrier (63) and the first gear (51) are all coaxially connected; the first planetary gear set (62) cooperates with the first planet carrier (63) and meshes with the first sun gear (61); and the first ring gear (64) is used to cooperate with the braking end (200); The second planetary gear transmission assembly (7) comprises a second sun gear (71), a second planetary gear set (72), a second planet carrier (73) and a second ring gear (74); the second sun gear (71) is coaxially connected to the output shaft of the second motor (2) and meshes with the second planetary gear set (72); the second planetary gear set (72) is coaxially connected to the second planet carrier (73); the second planet carrier (73) is coaxially connected to the output shaft of the engine (3); the second ring gear (74) is meshed with the second planetary gear set (72) and coaxially connected to the first planetary gear set (62); The drive assembly (8) comprises a first clutch (81), a second clutch (82) and a third clutch (83), wherein the first clutch (81) is used to connect or disconnect the first gear (51) and the output shaft of the first motor (1), the second clutch (82) is used to connect or disconnect the first planetary gear set (62) and the first planetary carrier (63), and the third clutch (83) is used to connect or disconnect the first ring gear (64) and the brake end (200); The controller is electrically connected to the first clutch (81), the second clutch (82), and the third clutch (83).

3. The hybrid power system according to claim 2, characterized in that: The controller is used to: When the vehicle is in a starting mode or a low-speed driving mode, if the vehicle speed is lower than a first vehicle speed threshold, the first motor (1) is controlled to operate, the second motor (2) and the engine (3) are controlled to stop operating, the first clutch (81) is controlled to engage, and the second clutch (82) and the third clutch (83) are controlled to disengage, so that the first motor (1) drives the wheels (100) of the vehicle to rotate.

4. The hybrid power system according to claim 2, characterized in that: The controller is used to: When the vehicle is in a starting mode or a low-speed driving mode, if the vehicle speed is not lower than a first vehicle speed threshold and lower than a second vehicle speed threshold, the first motor (1) and the second motor (2) are controlled to operate, the engine (3) is controlled to stop operating, the first clutch (81) and the second clutch (82) are controlled to engage, and the third clutch (83) is controlled to disengage, so that the first motor (1) and the second motor (2) jointly drive the wheels (100) of the vehicle to rotate.

5. The hybrid power system according to claim 2, characterized in that: The controller is used to: When the vehicle is in a starting mode or a low-speed driving mode, if the vehicle speed is not lower than a second vehicle speed threshold and lower than a third vehicle speed threshold, the first motor (1) and the second motor (2) are controlled to operate, the engine (3) is controlled to stop operating, the first clutch (81) and the third clutch (83) are controlled to engage, and the second clutch (82) is controlled to disengage, so that the first motor (1) and the second motor (2) jointly drive the wheels (100) of the vehicle to rotate.

6. The hybrid power system according to claim 2, characterized in that: The controller is used to: When the vehicle is in a medium-speed driving mode or a high-speed driving mode, if the vehicle speed is not lower than a third vehicle speed threshold and lower than a fourth vehicle speed threshold, the first motor (1), the second motor (2) and the engine (3) are controlled to operate, the first clutch (81) and the second clutch (82) are controlled to engage, and the third clutch (83) is controlled to disengage, so that the first motor (1), the second motor (2) and the engine (3) jointly drive the wheels (100) of the vehicle to rotate.

7. The hybrid power system according to claim 2, characterized in that: The controller is used to: When the vehicle is in a medium-speed driving mode or a high-speed driving mode, if the vehicle speed is not lower than a fourth vehicle speed threshold and lower than a fifth vehicle speed threshold, the first motor (1), the second motor (2) and the engine (3) are controlled to operate, the first clutch (81) and the third clutch (83) are controlled to engage, and the second clutch (82) is controlled to disengage, so that the first motor (1), the second motor (2) and the engine (3) jointly drive the wheels (100) of the vehicle to rotate.

8. The hybrid power system according to claim 2, characterized in that: The controller is used to: When the vehicle is in a gliding mode or a braking energy recovery mode, the first motor (1), the second motor (2) and the engine (3) are controlled to stop working, the first clutch (81) is controlled to engage, and the second clutch (82) and the third clutch (83) are controlled to disengage, so as to recover energy through the first motor (1).

9. The hybrid power system according to claim 2, characterized in that: The controller is used to: When the vehicle is in a gliding mode or a braking energy recovery mode, the first motor (1), the second motor (2) and the engine (3) are 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, so as to recover energy through the first motor (1) and the second motor (2).

10. A vehicle, characterized in that: The vehicle comprises a hybrid powertrain system as claimed in any one of claims 1 to 9.

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