Driving system and vehicle

Abstract

The invention provides a driving system and a vehicle, the driving system comprises an engine, an input shaft, a first clutch, an intermediate shaft, a second clutch, a first motor, a differential mechanism and a second motor, the first clutch comprises a first outer hub, a first driven disc and a second driven disc, and the first outer hub, the engine and the first motor are all connected with the input shaft; the second clutch is connected with the intermediate shaft and the input shaft, so that the driving system forms three gears, the engine can be always located in a better working area, the second clutch is provided with a first gear, the input shaft is provided with a second gear meshed with the first gear, and the first gear is meshed with the second gear. A third gear meshed with the first gear or the second gear is arranged on an output shaft of the first motor, and the first gear, the second gear and the third gear are coplanar, so that the structure is simpler and more compact, and the size is smaller.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and mainly to a drive system and a vehicle. Background Art

[0002] Currently, hybrid vehicle drive systems primarily include three basic configurations: series, parallel, and hybrid (including series-parallel and power-split). In the series configuration, there's no mechanical connection between the engine and the output shaft, enabling optimal speed / torque control. However, all energy must undergo two mechanical / electrical power conversions before it can be transferred to the output shaft, resulting in significant losses. Parallel transmission offers high transmission efficiency, but the mechanical connection between the engine and the output shaft doesn't guarantee the engine always operates within its optimal operating range, making it typically used at medium and high speeds. Hybrid combines the advantages of both series and parallel configurations, enabling both optimized engine control and efficient control at medium and high speeds. However, existing hybrid drive systems involve numerous components, resulting in complex structures, high costs, and often difficult spatial layouts, making them uneconomical. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a drive system and a vehicle, which can realize multi-gear control and reduce the size of the drive system.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A drive system includes an engine, an input shaft, a first clutch, an intermediate shaft, a second clutch, a first motor, a differential, and a second motor; the input shaft is connected to the engine; the first clutch includes a first outer hub, a first driven plate, and a second driven plate, the first driven plate and the second driven plate being respectively engageable with or disengageable from the first outer hub; the intermediate shaft is respectively connectable to the first driven plate and the second driven plate; the second clutch includes a second outer hub and a third driven plate, one of the intermediate shaft and the input shaft is fixedly connected to the second outer hub, and the other is provided with a first gear; the third driven plate is provided with a second gear, the second gear is meshed with the first gear, and the third driven plate is engageable with or disengageable from the second outer hub; the output shaft of the first motor is provided with a third gear, the third gear being transmission-connected to one of the first gear and the second gear; the differential is transmission-connected to the intermediate shaft; and the second motor is transmission-connected to the differential.

[0006] In some embodiments of the present application, the first driven disc and the second driven disc are respectively arranged on both sides of the axial direction of the first outer hub, the first driven disc is provided with a fourth gear, and the second driven disc is provided with a fifth gear; the intermediate shaft is provided with a sixth gear and a seventh gear, the sixth gear is engaged with the fourth gear, and the seventh gear is engaged with the fifth gear.

[0007] In some embodiments of the present application, the transmission ratio between the first gear and the second gear, the transmission ratio between the sixth gear and the fourth gear, and the transmission ratio between the seventh gear and the fifth gear are all different; an eighth gear is provided on the intermediate shaft, and the differential includes a differential body and a differential gear, the differential gear is connected to the differential body, and the differential gear is engaged with the eighth gear.

[0008] In some embodiments of the present application, the sixth gear and the seventh gear are spaced apart, and the eighth gear is arranged between the sixth gear and the seventh gear.

[0009] In some embodiments of the present application, the drive system further includes a transmission assembly connected between the differential gear and the second motor.

[0010] In some embodiments of the present application, the transmission assembly includes a ninth gear, which is disposed on an output shaft of the second motor and is engaged with one of the sixth gear and the seventh gear.

[0011] In some embodiments of the present application, the transmission assembly includes a transmission shaft, a ninth gear, a tenth gear, and an eleventh gear, the tenth gear and the eleventh gear are connected to the transmission shaft, the ninth gear is arranged on the output shaft of the second motor, the tenth gear is meshed with the ninth gear, and the eleventh gear is meshed with the differential gear.

[0012] In some embodiments of the present application, the engine and the second motor are located on the same axial side of the differential, and the first motor and the second motor are located on opposite axial sides of the differential.

[0013] In some embodiments of the present application, the operating modes of the drive system include: engine direct drive mode: one of the first driven disc and the second driven disc is combined with the first outer hub, or the third driven disc is combined with the second outer hub, and the engine is working; pure electric mode: the first driven disc and the second driven disc are both separated from the first outer hub, the third driven disc is separated from the second outer hub, and the second motor is working; parallel mode: one of the first driven disc and the second driven disc is combined with the first outer hub, or the third driven disc is combined with the second outer hub, the engine is working, and at least one of the first motor and the second motor is working. range-extended mode: the first driven disc and the second driven disc are both separated from the first outer hub, and the third driven disc is separated from the second outer hub, the engine drives the first motor to generate electricity, and the second motor works; parking power generation mode: the first driven disc and the second driven disc are both separated from the first outer hub, and the third driven disc is separated from the second outer hub, the engine drives the first motor to generate electricity; braking recovery mode: at least two of the first driven disc, the second driven disc and the first outer hub, and the second driven disc and the second outer hub are separated, and at least one of the first motor and the second motor generates electricity.

[0014] A vehicle comprises a vehicle body, a drive system and wheels; the drive system is fixed on the vehicle body; and the wheels are connected to a differential of the drive system.

[0015] Beneficial effects: The drive system of the present application includes an engine, an input shaft, a first clutch, an intermediate shaft, a second clutch, a first motor, a differential and a second motor, wherein the first clutch includes a first outer hub, a first driven plate and a second driven plate, and the intermediate shaft can be connected to the first driven plate and the second driven plate respectively; the second clutch includes a second outer hub and a third driven plate, one of the intermediate shaft and the input shaft is fixedly connected to the second outer hub, and the other is provided with a first gear, and the third driven plate is provided with a second gear, and the second gear is meshed with the first gear, so that the drive system forms three gears between the input shaft and the intermediate shaft, and can always be in a better working area when driven by the engine, and the third gear is provided on the output shaft of the first motor, and the third gear is transmission-connected to one of the first gear and the second gear, and the third gear is coplanar with the first gear and the second gear, so that the structure is simpler and more compact, and the volume is smaller.

[0016] A vehicle includes a vehicle body, wheels, and the above-mentioned drive system. The differential of the drive system is connected to the wheels. Therefore, the vehicle can achieve output at different vehicle speeds by controlling the drive system, and the engine is always in a better working range, thereby improving comfort and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the drive system in one embodiment of the present application. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the structure of the drive system in one embodiment of the present application. Figure 2 .

[0019] Figure 3 This is a schematic diagram of the structure of the drive system in one embodiment of the present application. Figure 3 .

[0020] Figure 4 This is a schematic diagram of the structure of the drive system in one embodiment of the present application. Figure 4 .

[0021] Explanation of the main component symbols: 100-drive system; 1-engine; 2-input shaft; 3-first clutch; 31-first outer hub; 32-first driven plate; 33-second driven plate; 4-intermediate shaft; 5-second clutch; 51-second outer hub; 52-third driven plate; 6-first motor; 7-differential; 71-differential body; 72-differential gear; 8-second motor; 9-transmission assembly; 91-ninth gear; 92-transmission shaft; 93-tenth gear; 94-eleventh gear; 11-first gear; 12-second gear; 13-third gear; 14-fourth gear; 15-fifth gear; 16-sixth gear; 17-seventh gear; 18-eighth gear. DETAILED DESCRIPTION

[0022] The present invention provides a drive system and a vehicle. To make the objectives, technical solutions, and effects of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] See Figures 1-4 A vehicle includes a vehicle body, a drive system 100 and wheels. The drive system 100 is fixed to the vehicle body, and the wheels are connected to the differential 7 of the drive system 100. Therefore, by controlling the drive system 100, the movement of the vehicle can be controlled.

[0026] Drive system 100 includes an engine 1, an input shaft 2, a first clutch 3, an intermediate shaft 4, a second clutch 5, a first motor 6, a differential 7, and a second motor 8. The input shaft 2 is connected to the engine 1, specifically directly to the output end of the engine 1. This reduces the axial structure of the drive system 100 in the input shaft 2, thereby reducing the axial size of the drive system 100. The first clutch 3 is disposed on the input shaft 2 and connected to the intermediate shaft 4. The second clutch 5 is disposed on one of the input shaft 2 and the intermediate shaft 4 and is in driving connection with the other, enabling power transmission between the input shaft 2 and the intermediate shaft 4 by controlling the first clutch 3 and the second clutch 5. The differential 7 is connected to the intermediate shaft 4, and the first motor 6 is in driving connection with the input shaft 2. Therefore, the power from the first motor 6 and the engine 1 must be transmitted to the intermediate shaft 4 through the first clutch 3 or the second clutch 5, and then transmitted to the wheels through the differential 7. The second motor 8 is in driving connection with the differential 7, allowing the second motor 8 to directly drive the wheels without passing through the first clutch 3 or the second clutch 5. The first motor 6 and the second motor 8 can be used for driving and also for generating electricity.

[0027] Specifically, the first clutch 3 includes a first outer hub 31, a first driven disc 32, and a second driven disc 33. The first and second driven discs 32, 33 can be engaged or disengaged with the first outer hub 31, respectively. The intermediate shaft 4 is drivingly connected to the first and second driven discs 32, 33, respectively, thereby forming two power transmission paths between the intermediate shaft 4 and the input shaft 2 through the first clutch 3. The second clutch 5 includes a second outer hub 51 and a third driven disc 52. One of the second outer hub 51 and the third driven disc 52 is connected to the intermediate shaft 4, while the other is drivingly connected to the input shaft 2. The third driven disc 52 can be engaged or disengaged with the second outer hub 51, thereby forming a single power transmission path between the intermediate shaft 4 and the input shaft 2 through the second clutch 5. Therefore, three power transmission paths are formed between the intermediate shaft 4 and the input shaft 2, indicating that the drive system 100 has three gear positions.

[0028] One of the intermediate shaft 4 and the input shaft 2 is fixedly connected to the second outer hub 51, and the other is provided with a first gear 11. The third driven plate 52 is provided with a second gear 12, and the second gear 12 is engaged with the first gear 11. The output shaft of the first motor 6 is provided with a third gear 13, and the third gear 13 is transmission-connected to one of the first gear 11 and the second gear 12, so that the third gear 13, the first gear 11 and the second gear 12 are connected on the same plane, thereby shortening the length of the input shaft 2.

[0029] The above-mentioned drive system 100 can realize power-free interruption switching between different working modes through the opening and closing of the first driven disc 32, the second driven disc 33 of the first clutch 3 or the third driven disc 52 of the second clutch 5 and the coordinated control of the speed and torque of the first motor 6 and the second motor 8. It not only has a simple and compact structure, few parts, convenient layout and low cost, but also can achieve a comprehensive improvement in the vehicle system's power and economy, thereby improving driving comfort.

[0030] exist Figure 1 、 Figure 2 and Figure 3 In the illustrated embodiment, the second outer hub 51 is connected to the intermediate shaft 4, the first gear 11 is disposed on the input shaft 2, and the third gear 13 meshes with the first gear 11. In this embodiment, the diameter of the third gear 13 is smaller than that of the first gear 11. This allows the engine 1 to drive the first motor 6 via the input shaft 2 to generate electricity. The power of the engine 1 acts to increase the speed and reduce the torque between the first gear 11 and the third gear 13. Consequently, while maintaining the same power generation, the size of the first motor 6 can be reduced, thereby lowering costs.

[0031] exist Figure 4In the illustrated embodiment, the second outer hub 51 is connected to the intermediate shaft 4, the first gear 11 is disposed on the input shaft 2, and the third gear 13 meshes with the second gear 12. The diameter of the third gear 13 is smaller than that of the second gear 12. This allows the engine 1 to drive the first motor 6 via the input shaft 2 to generate electricity. The power of the engine 1 is transmitted from the first gear 11 through the second gear 12 to the third gear 13, thereby increasing the speed and reducing the torque. This allows the first motor 6 to be reduced in size and cost while maintaining the same power output.

[0032] The first driven plate 32 and the second driven plate 33 are respectively arranged on opposite axial sides of the first outer hub 31. Thus, the first and second driven plates 32, 33, and the first outer hub 31 form a back-to-back arrangement, making the structure of the first clutch 3 more compact. This facilitates the arrangement of the transmission connection structure between the first and second driven plates 32, 33, and the intermediate shaft 5. Furthermore, the more compact structure reduces the axial dimension of the first clutch 3, thereby reducing the axial dimension of the drive system 100. Specifically, a fourth gear 14 is provided on the first driven plate 32, a fifth gear 15 is provided on the second driven plate 33, and a sixth gear 16 and a seventh gear 17 are provided on the intermediate shaft 4. The sixth gear 16 and the seventh gear 17 are spaced apart along the axial direction of the intermediate shaft 4. The sixth gear 16 meshes with the fourth gear 14 to form a transmission connection between the intermediate shaft 4 and the first driven plate 32, and the seventh gear 17 meshes with the fifth gear 15 to form a transmission connection between the intermediate shaft 4 and the second driven plate 33. By controlling the first outer hub 31 to be combined with the first driven disc 32 or the second driven disc 33, the power on the input shaft 2 is transmitted to the intermediate shaft 4 through the first driven disc 32, the fourth gear 14 and the sixth gear 16, or the power on the input shaft 2 is transmitted to the intermediate shaft 4 through the second driven disc 33, the fifth gear 15 and the seventh gear 17.

[0033] The first driven plate 32 and the second driven plate 33 are both positioned near the first outer hub 31. The axial dimension of the first clutch 3 is reduced, thereby reducing the axial dimension of the drive system 100. The second clutch 5 is positioned on the side of the second gear 12 facing away from the seventh gear 17, eliminating the need for space between the second gear 12 and the seventh gear 17 for mounting the second clutch 5. This further enhances the compactness between the first gear 11 and the fifth gear 15, and between the second gear 12 and the seventh gear 17. Furthermore, the second clutch 5 and the first motor 6 at least partially overlap in the axial direction, thereby reducing the axial dimension of the drive system 100.

[0034] The transmission ratio between the first gear 11 and the second gear 12, the transmission ratio between the sixth gear 16 and the fourth gear 14, and the transmission ratio between the seventh gear 17 and the fifth gear 15 are all different. The second outer hub 51 and the third driven disc 52, the first outer hub 31 and the first driven disc 32, and the first outer hub 31 and the second driven disc 33 cannot be combined at the same time, forming three gears of the drive system 100, and switching between the three gears is achieved through the control of the first clutch 3 and the second clutch 5, thereby increasing the range of power output of the drive system 100 and improving the power performance of the vehicle.

[0035] An eighth gear 18 is provided on the intermediate shaft 4, and the differential 7 includes a differential body 71 and a differential gear 72. The differential gear 72 is connected to the input end of the differential body 71, and the differential gear 72 is engaged with the eighth gear 18, so that the power of the intermediate shaft 4 is transmitted to the differential body 71 through the eighth gear 18 and the differential gear 72. The wheels are connected to the differential body 71, thereby realizing the power output of the drive system 100 to the wheels and realizing the movement of the vehicle.

[0036] The diameter of the differential gear 72 is larger than the diameter of the eighth gear 18, so that when power is transmitted from the eighth gear 18 to the differential gear 72, the speed is reduced and the torque is increased, so that the speed of the first motor 6 and the second motor 8 of the engine 1 can operate in a better working area, reducing energy consumption and improving the economy and comfort of the vehicle.

[0037] Among them, since the first driven plate 32 and the second driven plate 33 form a back-to-back structure with the first outer hub 31, there is a distance between the sixth gear 16 and the seventh gear 17. The eighth gear 18 is arranged between the sixth gear 16 and the seventh gear 17, so that the space between the sixth gear 16 and the seventh gear 17 is fully utilized, and there is no need to set up an additional location for installing the eighth gear 18, thereby shortening the length of the input shaft 2 and the intermediate shaft 4, making the structure of the drive system 100 more compact and smaller in size. Figure 1 In the illustrated embodiment, the eighth gear 18 is coplanar with the first outer hub 31 , thereby shortening the length of the input shaft 2 and the intermediate shaft 4 .

[0038] The drive system 100 further includes a transmission assembly 9 connected between the differential gear 72 and the second motor 8 .

[0039] In one embodiment, Figure 1 and Figure 4In the illustrated embodiment, the transmission assembly 9 includes a ninth gear 91 disposed on the output shaft of the second motor 8. The ninth gear 91 meshes with the sixth gear 16, transmitting the power of the second motor 8 to the wheels via the ninth gear 91, the sixth gear 16, the intermediate shaft 4, the eighth gear 18, the differential gear 72, and the differential body 71. Furthermore, the ninth gear 91 and the sixth gear 16 are coplanar, eliminating the need for a separate gear on the intermediate shaft for transmission connection with the second motor 8. This simplifies the structure and reduces the axial size of the drive system 100.

[0040] In one embodiment, Figure 3 In the illustrated embodiment, the transmission assembly 9 includes a ninth gear 91 disposed on the output shaft of the second motor 8. The ninth gear 91 meshes with the seventh gear 17, transmitting the power of the second motor 8 to the wheels via the ninth gear 91, the seventh gear 17, the intermediate shaft 4, the eighth gear 18, the differential gear 72, and the differential body 71. Furthermore, the ninth gear 91 and the seventh gear 17 are coplanar, eliminating the need for a separate gear on the intermediate shaft for transmission connection with the second motor 8. This simplifies the structure and reduces the axial size of the drive system 100.

[0041] In one embodiment, Figure 2 In the illustrated embodiment, the transmission assembly 9 includes a transmission shaft 92, a ninth gear 91, a tenth gear 93, and an eleventh gear 94. The tenth gear 93 and the eleventh gear 94 are connected to the transmission shaft 92. The ninth gear 91 is disposed on the output shaft of the second motor 8. The tenth gear 93 meshes with the ninth gear 91, and the eleventh gear 94 meshes with the differential gear 72. This allows the power of the second motor 8 to be transmitted to the wheels via the ninth gear 91, the tenth gear 93, the transmission shaft 92, the eleventh gear 94, the differential gear 72, and the differential body 71. The ninth gear 91, the tenth gear 93, and the sixth gear 16 are coplanar, and the eleventh gear 94 and the differential gear 72 are coplanar, thereby reducing the axial size of the drive system 100.

[0042] exist Figure 1 、 Figure 2 as well as Figure 4 In the illustrated embodiment, the engine 1 and the second motor 8 are located on the same axial side of the differential 7, and the engine 1 and the second motor 8 at least partially overlap in the axial direction, thereby reducing the axial size of the drive system 100. The first motor 6 and the second motor 8 are located on opposite axial sides of the differential 7.

[0043] exist Figure 3In the illustrated embodiment, the first motor 6 and the second motor 8 are located on the same axial side of the differential 7. Furthermore, the first motor 6, the second motor 7, and the second clutch 5 at least partially overlap in the axial direction, thereby reducing the axial dimension of the drive system 100. The engine 1 and the first motor 6 are located on opposite axial sides of the differential 7.

[0044] In the drive system 100 of the present application, by controlling the engine 1, the first motor 6, the second motor 8, the first clutch 3 and the second clutch 5, the drive system 100 can realize working modes such as motor direct drive mode, pure electric mode, parallel mode, extended range mode, parking power generation mode and braking recovery mode.

[0045] When the drive system 100 is in the engine 1 direct drive mode, one of the first driven disc 32 and the second driven disc 33 is coupled to the first outer hub 31, or the third driven disc 52 is coupled to the second outer hub 51, and the engine 1 is operating. Specifically, the engine 1 direct drive mode includes an engine 1 direct drive first gear mode, an engine 1 direct drive second gear mode, and an engine 1 direct drive third gear mode.

[0046] When the drive system 100 is in the first gear direct drive mode of the engine 1, the first driven plate 32 is engaged with the first outer hub 31, the second driven plate 33 is separated from the first outer hub 31, and the third driven plate 52 is separated from the second outer hub 51, and the engine 1 is operating. The power output by the engine 1 is transmitted to the differential 7 via the input shaft 2, the first outer hub 31, the first driven plate 32, the fourth gear 14, the sixth gear 16, the intermediate shaft 4, and the eighth gear 18.

[0047] When the drive system 100 is in the second gear mode of direct drive of the engine 1, the second driven plate 33 is engaged with the first outer hub 31, the first driven plate 32 is separated from the first outer hub 31, and the third driven plate 52 is separated from the second outer hub 51, and the engine 1 is operating. The power output by the engine 1 is transmitted to the differential 7 via the input shaft 2, the first outer hub 31, the second driven plate 33, the fifth gear 15, the seventh gear 17, the intermediate shaft 4, and the eighth gear 18.

[0048] When the drive system 100 is in the third gear direct drive mode of the engine 1, the first driven plate 32 and the second driven plate 33 are separated from the first outer hub 31, the third driven plate 52 is engaged with the second outer hub 51, and the engine 1 is operating. The power output by the engine 1 is transmitted to the differential 7 via the input shaft 2, the first gear 11, the second gear 12, the third driven plate 52, the first outer hub 31, the intermediate shaft 4, and the eighth gear 18.

[0049] When the drive system 100 is in pure electric mode, the first driven disc 32 and the second driven disc 33 are both separated from the first outer hub 31 , the third driven disc 52 is separated from the second outer hub 51 , the second motor 8 is working, and the output power of the second motor 8 is transmitted to the differential 7 .

[0050] When the drive system 100 is in parallel mode, one of the first driven disc 32 and the second driven disc 33 is coupled to the first outer hub 31, or the third driven disc 52 is coupled to the second outer hub 51. The engine 1 is in operation, and at least one of the first motor 6 and the second motor 8 is in operation. In parallel mode, the engine 1 and the first motor 6 can jointly output power, the engine 1 and the second motor 8 can jointly output power, the engine 1 and the first motor 6 and the second motor 8 can jointly output power, or the engine 1 and the second motor 8 can jointly output power and the first motor 6 can generate electricity. Therefore, there are 12 operating modes in parallel mode, as follows:

[0051] First parallel mode: the first driven disc 32 is coupled to the first outer hub 31 , the second driven disc 33 is separated from the first outer hub 31 , and the third driven disc 52 is separated from the second outer hub 51 , and the engine 1 and the first motor 6 jointly output power to the differential 7 .

[0052] Second parallel mode: the second driven disc 33 is coupled to the first outer hub 31 , the first driven disc 32 is separated from the first outer hub 31 , and the third driven disc 52 is separated from the second outer hub 51 , and the engine 1 and the first motor 6 jointly output power to the differential 7 .

[0053] Third parallel mode: the third driven disc 52 is coupled to the second outer hub 51 , the first driven disc 32 and the second driven disc 33 are separated from the first outer hub 31 , and the engine 1 and the first motor 6 jointly output power to the differential 7 .

[0054] Fourth parallel mode: the first driven disc 32 is coupled to the first outer hub 31 , the second driven disc 33 is separated from the first outer hub 31 , and the third driven disc 52 is separated from the second outer hub 51 , and the engine 1 and the second motor 8 jointly output power to the differential 7 .

[0055] Fifth parallel mode: the second driven disc 33 is coupled to the first outer hub 31 , the first driven disc 32 is separated from the first outer hub 31 , and the third driven disc 52 is separated from the second outer hub 51 , and the engine 1 and the second motor 8 jointly output power to the differential 7 .

[0056] Sixth parallel mode: the third driven disc 52 is coupled to the second outer hub 51 , the first driven disc 32 and the second driven disc 33 are separated from the first outer hub 31 , and the engine 1 and the second motor 8 jointly output power to the differential 7 .

[0057] Seventh parallel mode: the first driven disc 32 is coupled to the first outer hub 31 , the second driven disc 33 is separated from the first outer hub 31 , and the third driven disc 52 is separated from the second outer hub 51 , and the engine 1 , the first motor 6 , and the second motor 8 jointly output power to the differential 7 .

[0058] In the eighth parallel mode, the second driven disc 33 is coupled to the first outer hub 31 , the first driven disc 32 is separated from the first outer hub 31 , and the third driven disc 52 is separated from the second outer hub 51 . The engine 1 , the first motor 6 , and the second motor 8 jointly output power to the differential 7 .

[0059] Ninth parallel mode: the third driven disc 52 is combined with the second outer hub 51 , the first driven disc 32 and the second driven disc 33 are separated from the first outer hub 31 , and the engine 1 , the first motor 6 and the second motor 8 jointly output power to the differential 7 .

[0060] The tenth parallel mode: the first driven disc 32 is combined with the first outer hub 31, the second driven disc 33 is separated from the first outer hub 31, and the third driven disc 52 is separated from the second outer hub 51. Part of the power of the engine 1 and the second motor 8 jointly output power to the differential 7, and the other part of the power of the engine 1 drives the first motor 6 to generate electricity.

[0061] Eleventh parallel mode: the second driven disc 33 is combined with the first outer hub 31, the first driven disc 32 is separated from the first outer hub 31, and the third driven disc 52 is separated from the second outer hub 51. Part of the power of the engine 1 and the second motor 8 are jointly output to the differential 7, and the other part of the power of the engine 1 drives the first motor 6 to generate electricity.

[0062] Twelfth parallel mode: the third driven disc 52 is combined with the second outer hub 51, the first driven disc 32 and the second driven disc 33 are separated from the first outer hub 31, part of the power of the engine 1 and the second motor 8 are jointly output to the differential 7, and the other part of the power of the engine 1 drives the first motor 6 to generate electricity.

[0063] When the drive system 100 is in the extended-range mode, the first driven disc 32 and the second driven disc 33 are both separated from the first outer hub 31, and the third driven disc 52 is separated from the second outer hub 51. The engine 1 drives the first motor 6 to generate electricity, the second motor 8 works, and the output power of the second motor 8 is transmitted to the differential 7.

[0064] When the drive system 100 is in the parking power generation mode, the first driven disc 32 and the second driven disc 33 are separated from the first outer hub 31, and the third driven disc 52 is separated from the second outer hub 51. The engine 1 drives the first motor 6 to generate electricity, and the second motor 8 is stopped.

[0065] When the drive system 100 is in the regenerative braking mode, at least two of the first driven disc 32, the second driven disc 33, and the first outer hub 31, and the second driven disc 33 and the second outer hub 51 are separated, and at least one of the first motor 6 and the second motor 8 generates electricity. Therefore, the regenerative braking mode has four operating modes, as follows:

[0066] First braking recovery mode: the first driven disc 32 is engaged with the first outer hub 31, the second driven disc 33 is separated from the first outer hub 31, and the third driven disc 52 is separated from the second outer hub 51. The vehicle is in a moving state and does not need to output power, and the first motor 6 and the second motor 8 generate electricity driven by the wheels.

[0067] Second braking recovery mode: the second driven disc 33 is engaged with the first outer hub 31, the first driven disc 32 is separated from the first outer hub 31, and the third driven disc 52 is separated from the second outer hub 51. The vehicle is in a moving state and does not need to output power, and the first motor 6 and the second motor 8 generate electricity driven by the wheels.

[0068] Third braking recovery mode: the third driven disc 52 is combined with the second outer hub 51, the first driven disc 32 and the second driven disc 33 are separated from the first outer hub 31, the vehicle is in a moving state and does not need to output power, and the first motor 6 and the second motor 8 generate electricity driven by the wheels.

[0069] Fourth braking recovery mode: the first driven disc 32 and the second driven disc 33 are both separated from the first outer hub 31, and the third driven disc 52 is separated from the second outer hub 51. The vehicle is in a moving state and does not need to output power, and the second motor 8 generates electricity driven by the wheels.

[0070] Table 1: Operating modes of the drive system

[0071]

[0072]

[0073] As can be seen from the above table, the drive system 100 of the present application has at least 3 engine direct drive modes, 1 pure electric mode, 12 parallel modes, 1 extended-range mode, 1 parking power generation mode and 4 braking recovery modes. Therefore, the vehicle can switch between multiple working modes and can adapt to the needs of different road conditions and different vehicle speeds, thereby improving fuel economy and driving comfort.

[0074] Among them, when the vehicle is at medium and high speeds, it can efficiently switch to the direct drive or parallel drive mode of engine 1, so that the high efficiency area of ​​engine 1 covers medium and high speeds, avoiding the use of series range extension mode, thereby avoiding energy conversion loss and maximizing efficiency.

[0075] Specifically, 12 parallel modes are realized by the first motor 6, the second motor 8 and the engine 1, so that the vehicle has strong power; multiple engine 1 gears and parallel torque regulation of the motors enable the engine 1 high-efficiency range to cover all medium and high-speed driving conditions of the vehicle, and the combination selection of the two motors and the engine 1 and its multiple gears also ensures that the motor works in the high-efficiency range, so that the vehicle also has better economy.

[0076] The power of the second motor 8 covers the vehicle's primary driving requirements, ensuring no power interruption when switching operating modes. Using pure electric mode in conditions like starting and congestion ensures that the second motor 8 remains in a highly efficient operating range, enhancing the vehicle's overall economics. The simplified structure also offers system cost advantages. Furthermore, the second motor 8 enables a pure electric mode with a short transmission chain and high efficiency, meeting the vehicle's power and economic requirements.

[0077] In low-speed urban conditions and when feeding power, the drive system 100 can switch to the extended-range mode, allowing the vehicle to be charged while driving, effectively extending the system's range.

[0078] By combining the two motors and combining the first clutch and the second clutch 5 to realize the control of multiple gears, four energy recovery modes are realized, so that the motor is always in the high-efficiency operation range.

[0079] By disengaging the first and second clutches 5 and suspending the second motor 8, the engine 1 can drive the first motor 6 to generate electricity, thereby realizing the parking power generation function. When the battery SOC is low, the battery can be charged to meet the basic functional requirements of the vehicle. For example, the vehicle can use the parking power generation mode to charge the battery while waiting at a traffic light, or ensure that the electric air conditioner is not disconnected under such operating conditions.

[0080] In the drive system 100, the vehicle's current battery power value, throttle opening value, and vehicle speed are obtained; then the vehicle's operating mode is determined based on the vehicle's current battery power value, throttle opening value, and vehicle speed value; then, based on the vehicle's operating mode, the engine 1, the first motor 6, and the second motor 8 are controlled to operate, as well as the states of the first clutch 3 and the second clutch 5, so that the engine 1 is in the optimal operating area, thereby effectively reducing fuel consumption and improving fuel economy.

[0081] The drive system of the present application includes an engine, an input shaft, a first clutch, an intermediate shaft, a second clutch, a first motor, a differential and a second motor, wherein the first clutch includes a first outer hub, a first driven plate and a second driven plate, and the intermediate shaft can be connected to the first driven plate and the second driven plate respectively; the second clutch includes a second outer hub and a third driven plate, one of the intermediate shaft and the input shaft is fixedly connected to the second outer hub, and the other is provided with a first gear, and the third driven plate is provided with a second gear, and the second gear is meshed with the first gear, so that the drive system forms three gears between the input shaft and the intermediate shaft, and can always be in a better working area when driven by the engine, and the third gear is provided on the output shaft of the first motor, and the third gear is transmission-connected to one of the first gear and the second gear, and the third gear is coplanar with the first gear and the second gear, so that the structure is simpler and more compact, and the volume is smaller. In the drive system of the present application, there are only the first clutch and the second clutch as the gear operating components, which realize three-gear switching, so that the drive system has more working modes, and the vehicle speed changes relatively smoothly when the working mode is switched, which improves comfort, reduces the performance requirements of the engine and the motor, and is low in cost. At the same time, it also enables the engine and the motor to operate in the high-efficiency range, has excellent fuel economy performance, and makes the overall structure of the drive system simple, reduces the difficulty of operation, and can be arranged on the vehicle more conveniently. During the mode switching process, the second motor can always maintain the output driving force, avoid power interruption, and realize stepless speed change. In addition, the drive system of the present application is only provided with 3 gear planes on the intermediate shaft and the input shaft, so that the axial size is relatively small.

[0082] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A drive system, characterized in that: include: engine; an input shaft connected to the engine; a first clutch comprising a first outer hub, a first driven disc and a second driven disc, wherein the first driven disc and the second driven disc are respectively capable of being engaged with or disengaged from the first outer hub; an intermediate shaft, capable of being connected to the first driven disc and the second driven disc respectively; a second clutch comprising a second outer hub and a third driven plate, wherein one of the intermediate shaft and the input shaft is fixedly connected to the second outer hub, and the other is provided with a first gear, and the third driven plate is provided with a second gear, the second gear meshing with the first gear, and the third driven plate can be engaged with or disengaged from the second outer hub; a first motor, wherein a third gear is provided on an output shaft of the first motor, and the third gear is drivingly connected to one of the first gear and the second gear; a differential, drivingly connected to the intermediate shaft; The second motor is drivingly connected to the differential.

2. The drive system according to claim 1, characterized in that The first driven disc and the second driven disc are respectively arranged on both sides of the first outer hub in the axial direction, the first driven disc is provided with a fourth gear, and the second driven disc is provided with a fifth gear; The intermediate shaft is provided with a sixth gear and a seventh gear. The sixth gear is engaged with the fourth gear, and the seventh gear is engaged with the fifth gear.

3. The drive system according to claim 2, characterized in that: The transmission ratio between the first gear and the second gear, the transmission ratio between the sixth gear and the fourth gear, and the transmission ratio between the seventh gear and the fifth gear are all different; An eighth gear is provided on the intermediate shaft. The differential includes a differential body and a differential gear. The differential gear is connected to the differential body, and the differential gear is meshed with the eighth gear.

4. The drive system according to claim 3, characterized in that: The sixth gear and the seventh gear are spaced apart, and the eighth gear is disposed between the sixth gear and the seventh gear.

5. The drive system according to claim 3, characterized in that: The drive system further includes a transmission assembly connected between the differential gear and the second motor.

6. The drive system according to claim 5, characterized in that: The transmission assembly includes a ninth gear, which is disposed on the output shaft of the second motor and is engaged with one of the sixth gear and the seventh gear.

7. The drive system according to claim 5, characterized in that: The transmission assembly includes a transmission shaft, a ninth gear, a tenth gear and an eleventh gear, the tenth gear and the eleventh gear are connected to the transmission shaft, the ninth gear is arranged on the output shaft of the second motor, the tenth gear is meshed with the ninth gear, and the eleventh gear is meshed with the differential gear.

8. The drive system according to claim 1, characterized in that The engine and the second motor are located on the same side of the differential in an axial direction, and the first motor and the second motor are located on opposite sides of the differential in an axial direction.

9. The drive system according to claim 1, characterized in that: The drive system operating modes include: Engine direct drive mode: one of the first driven disc and the second driven disc is coupled to the first outer hub, or the third driven disc is coupled to the second outer hub, and the engine is operating; Pure electric mode: the first driven disc and the second driven disc are both separated from the first outer hub, the third driven disc is separated from the second outer hub, and the second motor is in operation; Parallel mode: one of the first driven disc and the second driven disc is coupled to the first outer hub, or the third driven disc is coupled to the second outer hub, the engine is operating, and at least one of the first motor and the second motor is operating; Extended-range mode: The first driven disc and the second driven disc are both separated from the first outer hub, and the third driven disc is separated from the second outer hub. The engine drives the first motor to generate electricity, and the second motor is in operation. Parking power generation mode: the first driven disc and the second driven disc are both separated from the first outer hub, and the third driven disc is separated from the second outer hub, and the engine drives the first motor to generate electricity; Braking recovery mode: at least two of the first driven disc, the second driven disc and the first outer hub, and the second driven disc and the second outer hub are separated, and at least one of the first motor and the second motor generates electricity.

10. A vehicle, characterized in that: include: body; The drive system according to any one of claims 1 to 9, wherein the drive system is fixed to the vehicle body; The wheels are connected to the differential of the drive system.

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