Hybrid systems and vehicles

Abstract

This disclosure provides a hybrid system and a vehicle, and belongs to the vehicle technology field. The hybrid system includes a first motor, a second motor, an engine, a differential, a wheel drive assembly, a first planetary gear drive assembly, a second planetary gear drive assembly, a drive assembly, and a controller. According to this disclosure, the controller can change the transmission mode and, by controlling the first motor, the second motor, the engine, the differential, and the drive assembly, adjust the wheel rotation speed of the vehicle to meet different needs in various driving conditions of the vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and particularly to hybrid systems and vehicles.

Background Art

[0002] In current hybrid vehicles, the hybrid system can significantly improve the power performance and fuel efficiency of the entire vehicle and reduce exhaust gas emissions, so it is widely supported.

Summary of the Invention

[0003] Embodiments of the present disclosure , provide a hybrid system and a vehicle, and the technical solution thereof is as follows.

[0004] Book Embodiments of the disclosure provide a hybrid system, the hybrid system including 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, the wheel transmission assembly being transmission-connected to an input shaft of the differential, and an output shaft of the differential being used to be transmission-connected to wheels of a vehicle, the first planetary gear transmission assembly being transmission-connected to the wheel transmission assembly, the second planetary gear transmission assembly being transmission-connected to the second motor, the engine, and the first planetary gear transmission assembly, the drive assembly being connected to the first motor, the wheel transmission assembly, the first planetary gear transmission assembly and a brake end, the controller being electrically connected to the first motor, the second motor, the engine, the differential, and the drive assembly.

[0005] In one possible embodiment, the wheel drive assembly includes a first gear, a second gear, and a third gear, wherein the first gear is mated to 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. The first planetary gear transmission assembly includes a first sun gear, a first planetary gear set, a first planetary carrier, and a first ring gear, wherein the first sun gear, the first planetary carrier, and the first gear are all coaxially connected, the first planetary gear set is mated with the first planetary carrier and meshes with the first sun gear, and the first ring gear is used to mate with the brake end. The second planetary gear drive assembly includes a second sun gear, a second planetary gear set, a second planetary carrier, and a second ring gear, wherein 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 planetary carrier, the second planetary carrier is coaxially connected to the output shaft of the engine, and the second ring gear meshes with the second planetary gear set and is coaxially connected to the first planetary gear set. The above drive assembly includes a first clutch, a second clutch, and a third clutch, wherein the first clutch is used to engage or disengage the output shaft of the first gear and the first motor, the second clutch is used to engage or disengage the first planetary gear set and the first planetary carrier, and the third clutch is used to engage or disengage the first ring gear and the brake end. The controller described above is electrically connected to the first clutch, the second clutch, and the third clutch.

[0006] In one possible embodiment, the controller is When the above-mentioned vehicle is in starting mode or low-speed driving mode, if the vehicle speed of the above-mentioned vehicle is below a first vehicle speed threshold, the first motor is activated, the operation of the second motor and the engine is stopped, the first clutch is engaged, and the second clutch and the third clutch are disengaged, thereby driving the wheels of the vehicle with the first motor to rotate them.

[0007] In one possible embodiment, the controller is When the above-mentioned vehicle is in starting mode or low-speed driving mode, if the vehicle speed is above a first vehicle speed threshold and below a second vehicle speed threshold, the first motor and the second motor are activated, the engine is stopped, the first clutch and the second clutch are engaged, and the third clutch is disengaged, so that the first motor and the second motor together drive and rotate the wheels of the vehicle.

[0008] In one possible embodiment, the controller is When the above-mentioned vehicle is in starting mode or low-speed driving mode, if the vehicle speed is above the second vehicle speed threshold and below the third vehicle speed threshold, the first motor and the second motor are activated, the engine is stopped, the first clutch and the third clutch are engaged, and the second clutch is disengaged, so that the first motor and the second motor together drive and rotate the wheels of the vehicle.

[0009] In one possible embodiment, the controller is When the above-mentioned vehicle is in medium-speed driving mode or high-speed driving mode, if the vehicle speed is greater than or equal to the third vehicle speed threshold and less than the fourth vehicle speed threshold, the first motor, the second motor and the engine are operated, the first clutch and the second clutch are engaged, and the third clutch is disengaged, so that the first motor, the second motor and the engine together drive and rotate the wheels of the vehicle.

[0010] In one possible embodiment, the controller is When the above-mentioned vehicle is in medium-speed driving mode or high-speed driving mode, if the vehicle speed is above the fourth vehicle speed threshold and below the fifth vehicle speed threshold, the first motor, the second motor and the engine are operated, the first clutch and the third clutch are engaged, and the second clutch is disengaged, so that the first motor, the second motor and the engine together drive and rotate the wheels of the vehicle.

[0011] In one possible embodiment, the controller is When the above vehicle is in coasting mode or regenerative braking mode, the operation of the first motor, the second motor and the engine is stopped, the first clutch is engaged, and the second clutch and the third clutch are disengaged, thereby recovering energy with the first motor.

[0012] In one possible embodiment, the controller is When the above-mentioned vehicle is in coasting mode or regenerative braking mode, the operation of the first motor, the second motor and the engine is stopped, the first clutch and the second clutch are engaged, and the third clutch is disengaged, thereby recovering energy using the first motor and the second motor.

[0013] In one possible embodiment, the hybrid system further includes a power battery, a first inverter, and a second inverter. The above-mentioned 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, and the second inverter is electrically connected to the second motor and the controller.

[0014] BookThe disclosed embodiments provide a vehicle, which includes the hybrid system described in any one of the above.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the present disclosure.

Brief Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the necessary drawings used in the embodiments are briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative labor. [Figure 1] It is a schematic structural diagram of the hybrid system shown in the embodiments of the present disclosure. [Figure 2] It is a schematic transmission diagram in the 10-speed driving mode of the pure electric single motor of the hybrid system shown in the embodiments of the present disclosure. [Figure 3] It is a schematic transmission diagram in the 11-speed driving mode of the pure electric dual motor of the hybrid system shown in the embodiments of the present disclosure. [Figure 4] It is a schematic transmission diagram in the 12-speed driving mode of the pure electric dual motor of the hybrid system shown in the embodiments of the present disclosure. [Figure 5] It is a schematic transmission diagram in the 11-speed driving mode of the parallel hybrid of the hybrid system shown in the embodiments of the present disclosure. [Figure 6] It is a schematic transmission diagram in the energy recovery mode of the parallel hybrid of the hybrid system shown in the embodiments of the present disclosure. [Figure 7] It is a schematic transmission diagram in the 12-speed driving mode of the parallel hybrid of the hybrid system shown in the embodiments of the present disclosure. [Figure 8] It is a schematic transmission diagram in the energy recovery mode of the parallel hybrid of the hybrid system shown in the embodiments of the present disclosure. [Figure 9] It is a schematic transmission diagram in the energy recovery mode of the hybrid system shown in the embodiments of the present disclosure.

Embodiments for Carrying out the Invention

[0017] To make the purpose, technical solution and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in more detail below in conjunction with the accompanying drawings.

[0018] Current hybrid systems are often developed based on conventional automatic gearboxes, simply integrating the motor and engine at the front or rear of the transmission.

[0019] While the above hybrid system can achieve power transmission, its structure is simple, its transmission efficiency is relatively low, and as a result, its operating mode is relatively single, making it unable to meet the different needs under various vehicle operating conditions.

[0020] The embodiments of the present disclosure provide a hybrid system. As shown in FIG. 1, the hybrid system includes a first motor 1, a second motor 2, an engine 3, a differential device 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).

[0021] Among them, the first motor 1, the second motor 2 and the engine 3 can all drive to rotate the vehicle wheels 100 and provide output torque for the rotation of the wheels 100.

[0022] The wheel transmission assembly 5 is transmission-connected to the input shaft of the differential device 4, and the output shaft of the differential device 4 is used to be transmission-connected to the vehicle wheels 100. 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 drive 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 device 4 and the drive assembly 8.

[0023] The controller controls the operation status of the first motor 1, the second motor 2, and the engine 3, as well as the operating state of the differential 4 and the drive assembly 8. This enables a transmission connection structure between the first motor 1, the second motor 2, the engine 3, and the input shaft of the differential 4. By transmitting different driving forces to the wheels 100 with different transmission ratios, different drive modes of the hybrid system are realized, thereby meeting the diverse needs of various driving conditions of the vehicle.

[0024] The following provides a more detailed description of the structure of the wheel drive assembly 5, the first planetary gear drive assembly 6, the second planetary gear drive assembly 7, and the drive assembly 8 in the hybrid system.

[0025] 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 is fitted to 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, which is transmitted to the wheels 100 of the vehicle.

[0026] To ensure that this is understood, in the embodiments of this disclosure, "to mate with" means that coaxial or off-axial connection can be achieved by the drive assembly 8 described later.

[0027] As can be understood, the coaxial connections in the embodiments of this disclosure can rotate simultaneously in the same direction and at the same rotational speed, or stop rotating simultaneously. For example, the second gear 52 is coaxially connected to the third gear 53, that is, when the second gear 52 rotates, it causes the third gear 53 to rotate in the same direction and at the same rotational speed, and when the second gear 52 stops rotating, the third gear 53 also stops rotating simultaneously.

[0028] The wheel transmission assembly 5 can provide a transmission connection between the wheel 100 and the output shafts of the first motor 1, the second motor 2, and the engine 3 via various devices, thereby enabling the first motor 1, the second motor 2, and the engine 3 to drive and rotate the wheel 100 via the wheel transmission assembly 5.

[0029] 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, wherein 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 is fitted to the first planetary carrier 63 and meshes with the first sun gear 61, and the first ring gear 64 is used to fit with the brake end 200.

[0030] The brake end 200 may be any non-rotating device on the vehicle, such as any position on the frame, and the embodiments of this disclosure are not limited to these.

[0031] 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, wherein 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, and the second ring gear 74 meshes with the second planetary gear set 72 and is coaxially connected to the first planetary gear set 62.

[0032] The first planetary gear transmission assembly 6 and the second planetary gear transmission assembly 7 can realize a 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, both the second motor 2 and the engine 3 can drive and rotate the wheel 100 via the first planetary gear transmission assembly 6, the second planetary gear transmission assembly 7 and the wheel transmission assembly 5.

[0033] 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 first gear 51 and the output shaft of the first motor 1. The second clutch 82 is used to engage or disengage the first planetary gear set 62 and the first planetary carrier 63. The third clutch 83 is used to engage or disengage the first ring gear 64 and the brake end 200.

[0034] The drive assembly 8 can realize different drive modes of the hybrid system through its own different states, thereby meeting the different needs of various driving conditions of the vehicle.

[0035] When the first clutch 81 is engaged, the first gear 51 is connected coaxially with the output shaft of the first motor 1, and when the first clutch 81 is disengaged, the first gear 51 is not connected coaxially with the output shaft of the first motor 1. That is, when the first gear 51 rotates, it does not rotate the output shaft of the first motor 1, and when the output shaft of the first motor 1 rotates, it does not rotate the first gear 51.

[0036] When the second clutch 82 is engaged, the first planetary gear set 62 is coaxially connected to the first planetary carrier 63, and the first planetary carrier 63 is coaxially connected to the first gear 51 and the first sun gear 61. Therefore, when the second clutch 82 is disengaged, the first planetary gear set 62 is not coaxially connected to the first planetary carrier 63.

[0037] When the third clutch 83 is engaged, the first ring gear 64 is coaxially connected to the brake end 200, and since the brake end 200 is not rotatable, the first ring gear 64 also does not rotate. When the third clutch 83 is disengaged, the first ring gear 64 is not coaxially connected to the brake end 200, and in this case, the first ring gear 64 is rotatable.

[0038] 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. 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, the controller realizes different drive modes of the hybrid system, thereby realizing different rotational speeds of the wheels 100, and consequently meeting different speed needs in various driving conditions of the vehicle.

[0039] In one possible embodiment, the hybrid system further includes a power battery 9, a first inverter 10, and a second inverter 11, wherein 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 a first motor 1 and a controller, and the second inverter 11 is electrically connected to a second motor 2 and a controller.

[0040] In this way, when it is necessary to control the operation of the first motor 1, the controller controls the first inverter 10 and outputs from the power battery 9. direct current of exchange The controller converts the output from the power battery 9 to supply power to the first motor 1, allowing the first motor 1 to start operating. If it is necessary to control the operation of the second motor 2, the controller controls the second inverter 11 to output the power from the power battery 9. direct current of exchange This can be converted to power the second motor 2, allowing the second motor 2 to start operating.

[0041] The following describes some of the drive modes that the hybrid system in the embodiments of this disclosure can achieve.

[0042] 1. Pure electric single motor 10-speed drive mode As shown in Figure 2, the controller is used to operate the first motor 1, stop the operation of the second motor 2 and engine 3, engage the first clutch 81, and disengage the second clutch 82 and third clutch 83 when the vehicle is in starting mode or low-speed driving mode and the vehicle speed is below a first vehicle speed threshold, so that the first motor 1 drives and rotates the vehicle's wheels 100.

[0043] In the implementation, the controller operates the first motor 1, stops the operation of the second motor 2 and engine 3, engages the first clutch 81, and disengages the second clutch 82 and third clutch 83. Then, referring to the dashed arrow in Figure 2, the power battery 9 begins to supply power to the first motor 1 via the first inverter 10.

[0044] Subsequently, referring to the solid arrows in Figure 2, when the first motor 1 is energized, the output shaft of the first motor 1 rotates the first gear 51, which in turn rotates the second gear 52, the third gear 53, the differential 4, and the wheel 100 in sequence, thereby realizing a pure electric single motor drive mode.

[0045] Of these, the first vehicle speed threshold may be any reasonable value and may be set according to the needs and actual conditions of the vehicle, and the embodiments of this disclosure are not limited thereto.

[0046] 2. 11-speed drive mode with pure electric dual motors As shown in Figure 3, when the vehicle is in starting mode or low-speed driving mode, the controller operates the first motor 1 and the second motor 2, stops the engine 3, engages the first clutch 81 and the second clutch 82, and disengages the third clutch 83, so that the first motor 1 and the second motor 2 together drive and rotate the vehicle's wheels 100.

[0047] In the implementation, the controller operates the first motor 1 and the second motor 2, stops the engine 3, engages the first clutch 81 and the second clutch 82, and disengages the third clutch 83. Then, referring to the dashed arrow in Figure 3, the power battery 9 begins supplying power to the first motor 1 via the first inverter 10 and to the second motor 2 via the second inverter 11.

[0048] Next, refer to the solid arrows in Figure 3. On the one hand, when the first motor 1 is energized, the output shaft of the first motor 1 rotates the first gear 51, and the first gear 51 rotates the second gear 52, the third gear 53, the differential 4, and the wheel 100 in sequence, thereby driving the first motor 1. On the other hand, when the second motor 2 is energized, the output shaft of the second motor 2 rotates the second sun gear 71, and the second sun gear 71 rotates 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 wheel 100 in sequence, thereby driving the second motor 2.

[0049] As a result, both the first motor 1 and the second motor 2 can drive the wheel 100, thereby realizing an 11-speed drive mode for a pure electric dual motor, improving output torque, and enabling driving at a faster speed than the 10-speed drive mode for a pure electric single motor.

[0050] The second vehicle speed threshold may be a value greater than any reasonable first vehicle speed threshold, and may be set according to the needs and the actual conditions of the vehicle; the embodiments of this disclosure are not limited to these.

[0051] 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 and achieve the same rotational speed.

[0052] 3. 12-speed drive mode with pure electric dual motors As shown in Figure 4, when the vehicle is in starting mode or low-speed driving mode, the controller operates the first motor 1 and the second motor 2, stops the engine 3, engages the first clutch 81 and the third clutch 83, and disengages the second clutch 82, so that the first motor 1 and the second motor 2 together drive and rotate the vehicle's wheels 100.

[0053] In the implementation, the controller operates the first motor 1 and the second motor 2, stops the engine 3, engages the first clutch 81 and the third clutch 83, and disengages the second clutch 82. Then, referring to the dashed arrow in Figure 4, the power battery 9 begins supplying power to the first motor 1 via the first inverter 10 and to the second motor 2 via the second inverter 11.

[0054] Refer to the solid arrows in Figure 4. On the one hand, when the first motor 1 is energized, the output shaft of the first motor 1 rotates the first gear 51, and the first gear 51 rotates the second gear 52, the third gear 53, the differential 4, and the wheel 100 in sequence, thereby driving the first motor 1. On the other hand, when the second motor 2 is energized, the output shaft of the second motor 2 rotates the second sun gear 71, and the second sun gear 71 rotates the second planetary gear set 72, the second ring gear 74, and the first planetary gear set 62 in sequence. Since the first ring gear 64 cannot rotate due to the engagement of the third clutch 83, the rotation of the first planetary gear set 62 rotates the first sun gear 61 and the first planetary carrier 63, and the second ring The transmission ratio between gear 74 and the first sun gear 61 is less than 1, that is, the rotational speed of the first sun gear 61 is greater than the rotational speed of the second ring gear 74, that is, the rotational speed of the first planetary carrier 63 is greater than the rotational speed of the second ring gear 74, and the first planetary carrier 63 then rotates the first gear 51, the second gear 52, the third gear 53, the differential 4, and the wheel 100, thereby driving the second motor 2.

[0055] As a result, both the first motor 1 and the second motor 2 can drive the wheel 100, thereby realizing a 12-speed drive mode for the pure electric dual motor, improving output torque, and enabling driving at a faster speed than the 11-speed drive mode for the pure electric dual motor.

[0056] Of these, the third vehicle speed threshold may be a value greater than any reasonable second vehicle speed threshold, and may be set according to the needs and the actual conditions of the vehicle, and the embodiments of this disclosure are not limited to these.

[0057] It should be noted that in the above process, the rotational speed of the first planetary carrier 63 is greater than the rotational speed of the second ring gear 74, therefore the second motor 2The driving rotational speed of the first motor relative to wheel 100 can be greater than the driving rotational speed of the second motor 2 relative to wheel 100 in the 11-speed drive mode of the pure electric dual motor, thereby realizing the 12-speed drive mode of the pure electric dual motor.

[0058] 4. Parallel hybrid 11-speed drive mode As shown in Figure 5, when the vehicle is in medium-speed or high-speed driving mode, the controller operates the first motor 1, the second motor 2, and the engine 3 when the vehicle speed is above the third vehicle speed threshold and below the fourth vehicle speed threshold, engaging the first clutch 81 and the second clutch 82 and disengaging the third clutch 83, so that the first motor 1, the second motor 2, and the engine 3 together drive and rotate the vehicle's wheels 100.

[0059] In the implementation, the controller operates the first motor 1, the second motor 2, and the engine 3, engages the first clutch 81 and the second clutch 82, and disengages the third clutch 83. Then, referring to the dashed arrow in Figure 5, the power battery 9 begins to supply power to the first motor 1 via the first inverter 10 and to the second motor 2 via the second inverter 11.

[0060] Refer to the solid arrows in Figure 5. On the one hand, when the first motor 1 is energized, the output shaft of the first motor 1 rotates the first gear 51, which in turn rotates the second gear 52, the third gear 53, the differential 4, and the wheel 100 in sequence, thereby driving the first motor 1. On the other hand, when the second motor 2 is energized, the output shaft of the second motor 2 drives the second sun gear 71 together with the output shaft of the engine 3, causing it to rotate, which in turn rotates 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 wheel 100 in sequence, thereby driving the second motor 2 and the engine 3.

[0061] As a result, the first motor 1, the second motor 2, and the engine 3 can all drive the wheels 100, thereby realizing an 11-speed drive mode for the parallel hybrid of the motors (including the first motor 1 and the second motor 2) and the engine 3, improving output torque, and enabling driving at a faster speed than the 12-speed drive mode of a pure electric dual motor.

[0062] Of these, the fourth vehicle speed threshold may be a value greater than any reasonable third vehicle speed threshold, and may be set according to the needs and the actual conditions of the vehicle, and the embodiments of this disclosure are not limited to these.

[0063] 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 and achieve the same rotational speed.

[0064] In one possible embodiment, as shown in Figure 6, if the required torque for the wheel 100 is relatively small and the first motor 1 and engine 3 can adequately provide the required torque, the vehicle's drive mode may be controlled by a controller to operate the first motor 1 and engine 3, engage the first clutch 81 and the second clutch 82, and disengage the third clutch 83.

[0065] In the implementation, the controller operates the first motor 1 and engine 3, engages the first clutch 81 and the second clutch 82, and disengages the third clutch 83. Then, referring to the dashed arrow in Figure 6, the power battery 9 supplies power to the first motor 1 only via the first inverter 10.

[0066] Refer to the solid arrows in Figure 6. On the one hand, when the first motor 1 is energized, the output shaft of the first motor 1 rotates the first gear 51, which in turn rotates the second gear 52, the third gear 53, the differential 4, and the wheel 100 in sequence, thereby driving the first motor 1. On the other hand, the output shaft of the engine 3 drives and rotates the second sun gear 71, which in turn rotates 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 wheel 100 in sequence, thereby driving the engine 3.

[0067] If the sum of the output torque acting on the wheel 100 by engine 3 and the output torque acting on the wheel 100 by the first motor 1 is greater than the torque required for the wheel 100, the excess output torque of engine 3 can be transmitted to the output shaft of the second motor 2 via the second sun gear 71. Referring to the dashed arrow in Figure 6, engine 3 transmits the excess mechanical energy to the output shaft of the second motor 2 via the second sun gear 71. The second motor 2 converts the received mechanical energy into electrical energy, which can then be used to supply power to the first motor 1 or to charge the power battery 9. In this way, energy recovery is achieved via the second motor 2.

[0068] 5. Parallel hybrid 12-speed drive mode As shown in Figure 7, when the vehicle is in medium-speed or high-speed driving mode, the controller operates the first motor 1, the second motor 2, and the engine 3 when the vehicle speed is above the fourth vehicle speed threshold and below the fifth vehicle speed threshold, engaging the first clutch 81 and the third clutch 83 and disengaging the second clutch 82, thereby using the first motor 1, the second motor 2, and the engine 3 to drive and rotate the vehicle's wheels 100.

[0069] In the implementation, the controller operates the first motor 1, the second motor 2, and the engine 3, engages the first clutch 81 and the third clutch 83, and disengages the second clutch 82. Then, referring to the dashed arrow in Figure 7, the power battery 9 begins to supply power to the first motor 1 via the first inverter 10 and to the second motor 2 via the second inverter 11.

[0070] Refer to the solid arrows in Figure 7. On the one hand, when the first motor 1 is energized, the output shaft of the first motor 1 rotates the first gear 51, and the first gear 51 rotates the second gear 52, the third gear 53, the differential 4, and the wheel 100 in sequence, thereby driving the first motor 1. On the other hand, when the second motor 2 is energized, the output shaft of the second motor 2 drives the second sun gear 71 together with the output shaft of the engine 3 to rotate, and the second sun gear 71 rotates the second planetary gear set 72, the second ring gear 74, and the first planetary gear set 62 in sequence. Because the first ring gear 64 cannot rotate due to the engagement of the third clutch 83, the rotation of the first planetary gear set 62 rotates the first sun gear 61 and the first planetary carrier 63, and the The transmission ratio between the second ring gear 74 and the first sun gear 61 is less than 1, meaning the rotational speed of the first sun gear 61 is greater than the rotational speed of the second ring gear 74, meaning the rotational speed of the first planetary carrier 63 is greater than the rotational speed of the second ring gear 74. Subsequently, the first planetary carrier 63 rotates 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 and the engine 3.

[0071] As a result, the first motor 1, the second motor 2, and the engine 3 can all drive the wheels 100, thereby realizing a 12-speed drive mode for the parallel hybrid of the motors (including the first motor 1 and the second motor 2) and the engine 3, improving output torque, and enabling driving at a faster speed than the 11-speed drive mode of the parallel hybrid.

[0072] Of these, the fifth vehicle speed threshold may be a value greater than any reasonable fourth vehicle speed threshold, and may be set according to the needs and the actual conditions of the vehicle, and the embodiments of this disclosure are not limited to these.

[0073] It should be noted that, in the above process, the rotational speed of the first planetary carrier 63 is greater than the rotational speed of the second ring gear 74. Therefore, the combined rotational speed of the second motor 1 and engine 3 driving the wheels 100 can be greater than the combined rotational speed of the second motor 2 and engine 3 driving the wheels 100 in the parallel hybrid's 11-speed driving mode, thereby realizing the parallel hybrid's 12-speed driving mode.

[0074] In one possible embodiment, as shown in Figure 8, if the required torque for the wheel 100 is relatively small and the first motor 1 and engine 3 can adequately provide the required torque, the vehicle's drive mode may be controlled by a controller to operate the first motor 1 and engine 3, engage the first clutch 81 and the third clutch 83, and disengage the second clutch 82.

[0075] In the implementation, the controller operates the first motor 1 and engine 3, engages the first clutch 81 and the third clutch 83, and disengages the second clutch 82. Then, referring to the dashed arrow in Figure 8, the power battery 9 supplies power to the first motor 1 only via the first inverter 10.

[0076] Next, refer to the solid arrows in Figure 8. On the one hand, when the first motor 1 is energized, the output shaft of the first motor 1 rotates the first gear 51, and the first gear 51 rotates the second gear 52, the third gear 53, the differential 4, and the wheel 100 in sequence, thereby driving the first motor 1. On the other hand, the output shaft of engine 3 drives the second sun gear 71 to rotate, which in turn rotates the second planetary gear set 72, the second ring gear 74, and the first planetary gear set 62 in sequence. The rotation of the first planetary gear set 62 rotates the first sun gear 61 and the first planetary carrier 63, and the transmission ratio between the second ring gear 74 and the first sun gear 61 is less than 1. Subsequently, the first planetary carrier 63 rotates the first gear 51, the second gear 52, the third gear 53, the differential 4, and the wheels 100, thereby driving engine 3.

[0077] If the sum of the output torque acting on the wheel 100 by engine 3 and the output torque acting on the wheel 100 by the first motor 1 is greater than the torque required for the wheel 100, the excess output torque of engine 3 can be transmitted to the output shaft of the second motor 2 via the second sun gear 71. Referring to the dashed arrow in Figure 8, engine 3 transmits the excess mechanical energy to the output shaft of the second motor 2 via the second sun gear 71. The second motor 2 converts the received mechanical energy into electrical energy, which can then be used to supply power to the first motor 1 or to charge the power battery 9. In this way, energy recovery is achieved via the second motor 2.

[0078] 6. Energy Recovery Mode As shown in Figure 9, the controller is used to recover energy via the first motor 1 when the vehicle is in coasting mode or regenerative braking mode by controlling the operation of the first motor 1, the second motor 2 and the engine 3, engaging the first clutch 81 and disengaging the second clutch 82 and the third clutch 83.

[0079] In implementation, referring to the solid arrows in Figure 9, when the vehicle is in coasting mode or regenerative braking mode, the rotation of the wheels 100 rotates the differential 4, the third gear 53, the second gear 52, the first gear 51, and the output shaft of the first motor 1 in sequence; that is, the wheels 100 transmit mechanical energy to the output shaft of the first motor 1.

[0080] Subsequently, referring to the dashed arrow in Figure 9, the first motor 1 converts the received mechanical energy into electrical energy, transmits it to the power battery 9 via the first inverter 10, and charges the power battery 9, thereby achieving energy recovery via the first motor 1.

[0081] In the 11-speed and 12-speed drive modes of the parallel hybrid described above, the engine 3 and the second motor 2 achieve stepless speed control via the second planetary gear transmission assembly 7, and the rotational speed of the engine 3 is decoupled from the wheels 100, allowing the engine 3 to operate in a high-efficiency range and improving the overall performance of the engine 3.

[0082] Furthermore, as can be seen from the various drive modes described above, the hybrid system in the embodiment of this disclosure enables the vehicle to use a pure electric driving mode in the starting mode and low-speed driving mode, improving dynamism by utilizing the characteristics of fast motor response and high torque at low speeds, as well as avoiding energy loss due to frequent starting and stopping of the engine 3 and improving fuel savings. The hybrid system in the embodiment of this disclosure also enables the engine 3 to intervene in the drive when the vehicle is in the medium-speed driving mode and high-speed driving mode, operating the engine 3 in a high-efficiency range and improving the overall performance of the engine 3.

[0083] The hybrid system structure in the embodiments of this disclosure is compact and can realize a variety of drive modes, but the above only describes in detail some of these drive modes, and the embodiments of this disclosure do not specifically limit other drive modes that the hybrid system can realize.

[0084] The embodiments of this disclosure provide a vehicle which includes the hybrid system described in any one of the above.

[0085] The technical proposals provided by the embodiments of this disclosure include at least the following beneficial effects:

[0086] Embodiments of this disclosure provide a hybrid system in which the controller can change the transmission mode and, by controlling the first motor 1, the second motor 2, the engine 3, the differential 4, and the drive assembly 8, adjust the rotational speed of the vehicle's wheels 100 to meet different needs in various driving conditions of the vehicle.

[0087] The above description is merely an optional embodiment of the Disclosure and is not intended to limit the Disclosure. Any modifications, substitutions, or improvements made within the spirit and principles of the Disclosure should be included within the scope of the Disclosure. [Explanation of Symbols]

[0088] 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. The first gear; 52. The second gear; 53. The 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.

[0089] This application claims priority to a Chinese patent application filed on November 15, 2023, with application number 202311543734X and title "Hybrid System and Vehicle," the entire contents of which are incorporated into this application by reference.

Claims

1. A hybrid system comprising a first motor (1), a second motor (2), an engine (3), a differential (4), a wheel drive assembly (5), a first planetary gear drive assembly (6), a second planetary gear drive assembly (7), a drive assembly (8), and a controller. The wheel transmission assembly (5) is connected to the input shaft of the differential (4), and the output shaft of the differential (4) is used to be connected to the wheels (100) of the vehicle. The first planetary gear transmission assembly (6) is transmitted to the wheel transmission assembly (5), The second planetary gear transmission assembly (7) is transmitted to the second motor (2), the engine (3), and the first planetary gear transmission assembly (6). The drive 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 characterized by being electrically connected to the first motor (1), the second motor (2), the engine (3), the differential (4), and the drive assembly (8). Hybrid system.

2. The wheel transmission assembly (5) includes a first gear (51), a second gear (52), and a third gear (53), wherein the first gear (51) is fitted to 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), and the third gear (53) meshes with the input shaft of the differential (4). 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), wherein 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) is used to engage with the first planetary carrier (63) and mesh with the first sun gear (61), and the first ring gear (64) is used to engage with the brake end (200). 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), wherein 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), and the second ring gear (74) meshes with the second planetary gear set (72) and is coaxially connected to the first planetary gear set (62). The drive assembly (8) includes a first clutch (81), a second clutch (82), and a third clutch (83), the first clutch (81) being used to engage or disengage the first gear (51) and the output shaft of the first motor (1), the second clutch (82) being used to engage or disengage the first planetary gear set (62) and the first planetary carrier (63), and the third clutch (83) being used to engage or disengage the first ring gear (64) and the brake end (200). The controller is characterized by being electrically connected to the first clutch (81), the second clutch (82), and the third clutch (83). The hybrid system according to claim 1.

3. The aforementioned controller, When the vehicle is in a starting mode or a low-speed driving mode, if the vehicle speed is below a first vehicle speed threshold, the first motor (1) is activated, the operation of the second motor (2) and the engine (3) is stopped, the first clutch (81) is engaged, and the second clutch (82) and the third clutch (83) are disengaged, thereby driving and rotating the vehicle's wheels (100) with the first motor (1). The hybrid system according to claim 2.

4. The aforementioned controller, When the vehicle is in a starting mode or a low-speed driving mode, if the vehicle's speed is above a first vehicle speed threshold and below a second vehicle speed threshold, the first motor (1) and the second motor (2) are activated, the engine (3) is stopped, the first clutch (81) and the second clutch (82) are engaged, and the third clutch (83) is disengaged, so that the first motor (1) and the second motor (2) together drive and rotate the vehicle's wheels (100). The hybrid system according to claim 2.

5. The aforementioned controller, When the vehicle is in a starting mode or a low-speed driving mode, if the vehicle speed is above a second vehicle speed threshold and below a third vehicle speed threshold, the first motor (1) and the second motor (2) are activated, the engine (3) is stopped, the first clutch (81) and the third clutch (83) are engaged, and the second clutch (82) is disengaged, so that the first motor (1) and the second motor (2) together drive and rotate the vehicle's wheels (100). The hybrid system according to claim 2.

6. The aforementioned controller, When the vehicle is in a medium-speed driving mode or a high-speed driving mode, if the vehicle speed is greater than or equal to a third vehicle speed threshold and less than a fourth vehicle speed threshold, the first motor (1), the second motor (2), and the engine (3) are operated, the first clutch (81) and the second clutch (82) are engaged, and the third clutch (83) is disengaged, so that the first motor (1), the second motor (2), and the engine (3) together drive and rotate the vehicle's wheels (100), characterized in that the system is used in such a manner. The hybrid system according to claim 2.

7. The aforementioned controller, When the vehicle is in a medium-speed driving mode or a high-speed driving mode, if the vehicle speed is above a fourth vehicle speed threshold and below a fifth vehicle speed threshold, the first motor (1), the second motor (2), and the engine (3) are activated, the first clutch (81) and the third clutch (83) are engaged, and the second clutch (82) is disengaged, so that the first motor (1), the second motor (2), and the engine (3) together drive and rotate the vehicle's wheels (100). The hybrid system according to claim 2.

8. The aforementioned controller, The system is characterized in that, when the vehicle is in coasting mode or regenerative braking mode, it controls the operation of the first motor (1), the second motor (2), and the engine (3) to stop, engage the first clutch (81), and disengage the second clutch (82) and the third clutch (83) to recover energy using the first motor (1). The hybrid system according to claim 2.

9. The aforementioned controller, When the vehicle is in coasting mode or regenerative braking mode, the operation of the first motor (1), the second motor (2), and the engine (3) is stopped, the first clutch (81) and the second clutch (82) are engaged, and the third clutch (83) is disengaged, thereby controlling the system to recover energy using the first motor (1) and the second motor (2). The hybrid system according to claim 2.

10. A hybrid system comprising any one of claims 1 to 9, vehicle.

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