Longitudinal hybrid drive system and vehicles having it

Abstract

This invention provides a longitudinally mounted hybrid drive system and a vehicle having the same. The longitudinally mounted hybrid drive system includes an engine, a second motor, and a first motor. The second motor is connected to the engine via a clutch, wherein the clutch has a driving end, a first driven end, and a second driven end. The driving end is connected to the second motor, the first driven end is selectively connected to the output end of the engine, the output end of the second motor is connected to a first end of a second input shaft, and the second end of the second input shaft is connected to the rear wheel via a second transmission device. The output end of the first motor is connected to the first end of the first input shaft, the first input shaft is loosely fitted onto the second input shaft, the second motor is located between the first motor and the engine, and the second end of the first input shaft is connected to the front wheel via a first transmission device. This drive system, longitudinally arranged on the vehicle, solves the problem of limited axial space in the transmission device and enables better handling performance.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to a longitudinally mounted hybrid drive system and a vehicle having the same. Background Technology

[0002] Driven by environmental protection and fuel economy considerations, an increasing number of vehicles are adopting hybrid drive systems. Hybrid drive systems combine multiple power sources to achieve a reasonable power distribution among them. They play a crucial role in the development of hybrid vehicles, as their performance directly affects whether the overall vehicle performance meets design requirements; they are the core component of a hybrid vehicle. The key to a hybrid drive system is providing the possibility of efficient operation of both the engine and electric motor under all operating conditions. The transmission method is the foundation for achieving efficient system operation. Currently, most dual-motor hybrid solutions on the market are arranged laterally on the vehicle. Due to limited lateral space, these solutions are often very compact, increasing the difficulty of designing and manufacturing corresponding components, limiting torque capacity, and resulting in poor handling performance. Summary of the Invention

[0003] The main objective of this invention is to provide a longitudinally mounted hybrid drive system and a vehicle having the same, in order to solve the problem of limited torque space and poor handling performance caused by the limited lateral space of the vehicle in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, a longitudinally mounted hybrid power drive system is provided, comprising an engine, a second motor, and a first motor. The second motor is connected to the engine via a clutch, wherein the clutch has a driving end, a first driven end, and a second driven end. The driving end is connected to the second motor, the first driven end is selectively connected to the output end of the engine, the output end of the second motor is connected to a first end of a second input shaft, and the second end of the second input shaft is connected to a rear wheel via a second transmission device. The output end of the first motor is connected to the first end of the first input shaft, the first input shaft is loosely fitted onto the second input shaft, the second motor is located between the first motor and the engine, and the second end of the first input shaft is connected to the front wheel via a first transmission device.

[0005] Furthermore, the first transmission device includes a first gear pair, a first motor located between the second motor and the first gear pair, the first gear pair being used to connect the first input shaft and the first output shaft, the first output shaft being located on one side of the first input shaft, and the first input shaft and the first output shaft being arranged parallel to each other, and the first output shaft being connected to the front wheel.

[0006] Furthermore, the first gear pair includes a first driving gear and a first driven gear. The first input shaft is coaxially arranged with the first driving gear, the first driven gear is located on one side of the first driving gear, the first driven gear is meshed with the first driving gear, and the first driven gear is coaxially arranged with the first output shaft.

[0007] Furthermore, the second transmission device includes an intermediate shaft and a second output shaft. The intermediate shaft is disposed on one side of the second input shaft and is arranged parallel to the second input shaft and the second output shaft. A synchronization device is disposed on the intermediate shaft. The second output shaft is coaxially disposed with the second input shaft and is connected to the rear wheel.

[0008] Furthermore, the second transmission device also includes a second gear pair, a third gear pair, and a fourth gear pair. The second gear pair is connected to the second input shaft, and the second input shaft is connected to the intermediate shaft via the second gear pair. The synchronizing device can engage or disengage with the second driven gear of the second gear pair. The third gear pair is connected to the second input shaft, and the second gear pair is located between the first and third gear pairs. The synchronizing device can engage or disengage with the third driven gear of the third gear pair. The fourth gear pair is connected to the second output shaft, and the third gear pair is located between the fourth and second gear pairs. Controlling the synchronizing device allows it to engage with one of the second or third gear pairs to change the transmission ratio between the intermediate shaft and the second output shaft.

[0009] Furthermore, the second driving gear of the second gear pair and the third driving gear of the third gear pair are respectively coaxially arranged with the second input shaft. The second driven gear is meshed with the second driving gear, and the third driven gear is meshed with the third driving gear. The second driven gear, the third driven gear, and the fourth driving gear of the fourth gear pair are coaxially arranged with the intermediate shaft. The fourth driving gear is meshed with the fourth driven gear of the fourth gear pair, and the fourth driven gear is coaxially arranged with the second output shaft.

[0010] Furthermore, the axes of the first gear pair, the second gear pair, the third gear pair, and the fourth gear pair are parallel to each other, and the axes of the first gear pair, the second gear pair, the third gear pair, and the fourth gear pair are all set perpendicular to the direction of the vehicle width.

[0011] Furthermore, the longitudinally mounted hybrid drive system also includes a battery, which is electrically connected to at least one of the first motor and the second motor.

[0012] Furthermore, the output torques of the first motor, the second motor, and the engine can be arbitrarily combined to ensure that at least one of the front wheels and the rear wheels receives the combined total driving torque.

[0013] According to another aspect of the present invention, a vehicle is provided, including the longitudinally mounted hybrid drive system described above.

[0014] Furthermore, the vehicle includes multiple operating modes, including: pure electric drive mode, series range extender mode, engine direct drive two-wheel drive mode, engine two-wheel drive charging and discharging mode, four-wheel drive mode, brake energy recovery mode, and idle charging mode.

[0015] By applying the technical solution of this invention, an engine, a first motor, and a second motor are installed. The engine drives the motor to generate electricity, providing ample electrical energy. Whether the engine participates in driving at high speeds or not at low speeds, it operates in the most economical mode, significantly reducing fuel consumption. Furthermore, by connecting the first motor to the first end of the first input shaft, and the second end of the first input shaft to the front wheels via a first transmission device, and connecting the second motor to the first end of the second input shaft, and the second end of the second input shaft to the rear wheels via a second transmission device, this drive system can switch between front-wheel drive, rear-wheel drive, and four-wheel drive, greatly improving the vehicle's handling. In addition, the longitudinal arrangement of this drive system on the vehicle solves the problem of limited axial space in the transmission device, resulting in greater axial space, lower difficulty in component design and manufacturing, and higher torque capacity, leading to better handling performance. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of a first embodiment of the longitudinally mounted hybrid drive system according to the present invention is shown;

[0018] Figure 2 A schematic diagram of a second embodiment of the longitudinally mounted hybrid drive system according to the present invention is shown;

[0019] Figure 3 A schematic diagram of a third embodiment of the longitudinally mounted hybrid drive system according to the present invention is shown;

[0020] Figure 4 A schematic diagram of a fourth embodiment of the longitudinally mounted hybrid drive system according to the present invention is shown;

[0021] Figure 5 A schematic diagram of a fifth embodiment of the longitudinally mounted hybrid drive system according to the present invention is shown;

[0022] Figure 6 A schematic diagram of a sixth embodiment of the longitudinally mounted hybrid drive system according to the present invention is shown;

[0023] Figure 7A schematic diagram of a seventh embodiment of a longitudinally mounted hybrid drive system according to the present invention is shown;

[0024] Figure 8 A schematic diagram of the structure of an eighth embodiment of the longitudinally mounted hybrid drive system according to the present invention is shown;

[0025] Figure 9 A schematic diagram of a ninth embodiment of a longitudinally mounted hybrid drive system according to the present invention is shown;

[0026] Figure 10 A schematic diagram of a tenth embodiment of a longitudinally mounted hybrid drive system according to the present invention is shown;

[0027] Figure 11 A schematic diagram of the structure of an eleventh embodiment of the longitudinally mounted hybrid drive system according to the present invention is shown;

[0028] Figure 12 A schematic diagram of the structure of a twelfth embodiment of the longitudinally mounted hybrid drive system according to the present invention is shown;

[0029] Figure 13 A schematic diagram of a thirteenth embodiment of a longitudinally mounted hybrid drive system according to the present invention is shown.

[0030] The above figures include the following reference numerals:

[0031] 100. First motor;

[0032] 200. Second motor;

[0033] 300. Engine;

[0034] 400. Front wheel differential;

[0035] 500. Rear wheel differential;

[0036] 600, battery;

[0037] 1. First input axis;

[0038] 2. First output shaft;

[0039] 3. Second input axis;

[0040] 4. Intermediate shaft;

[0041] 5. Second output shaft;

[0042] 6. Synchronization device;

[0043] 7. Clutch; 71. Driving end; 72. First driven end; 73. Second driven end;

[0044] 11. First driving wheel; 21. First driven wheel; 31. Second driving wheel; 32. Third driving wheel;

[0045] 41. Second driven wheel; 42. Third driven wheel; 43. Fourth driving wheel; 53. Fourth driven wheel. Detailed Implementation

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0048] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0049] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0050] Combination Figures 1 to 13 As shown, according to a specific embodiment of the present invention, a longitudinal hybrid power drive system is provided.

[0051] Specifically, such as Figure 1As shown, a longitudinally mounted hybrid drive system includes an engine 300, a second motor 200, and a first motor 100. The second motor 200 is connected to the engine 300 via a clutch 7, wherein the clutch 7 has a driving end 71, a first driven end 72, and a second driven end 73. The driving end 71 is connected to the second motor 200, and the first driven end 72 is optionally connected to the output end of the engine 300. The output end of the second motor 200 is connected to the first end of a second input shaft 3, and the second end of the second input shaft 3 is connected to the rear wheel via a second transmission device. The output end of the first motor 100 is connected to the first end of the first input shaft 1, which is loosely fitted onto the second input shaft 3. The second motor 200 is located between the first motor 100 and the engine 300, and the second end of the first input shaft 1 is connected to the front wheel via a first transmission device.

[0052] In this embodiment, by setting up an engine 300, a first motor 100, and a second motor 200, the engine drives the motors to generate electricity, providing sufficient electrical energy. Whether the engine participates in driving at high speeds or not at low speeds, it operates in the most economical mode, significantly reducing fuel consumption. Furthermore, by connecting the first motor 100 to the first end of the first input shaft 1, and the second end of the first input shaft 1 to the front wheels via a first transmission device, and connecting the second motor 200 to the first end of the second input shaft 3, and the second end of the second input shaft 3 to the rear wheels via a second transmission device, this drive system can switch between front-wheel drive, rear-wheel drive, and four-wheel drive, greatly improving the vehicle's handling. In addition, the longitudinal arrangement of this drive system on the vehicle solves the problem of limited axial space in the transmission device, resulting in greater axial space, lower difficulty in component design and manufacturing, and higher torque capacity, leading to better handling performance.

[0053] Specifically, the driving end 71 engages with the first driven end 72 to connect the second motor 200 to the engine 300, and the driving end 71 engages with the second driven end 73 to connect the second motor 200 to the first input shaft 1. The driving end 71 of the clutch 7 can engage with either the first driven end 72 or the second driven end 73, and the driving end 71 of the clutch 7 can engage with both the first driven end 72 and the second driven end 73 simultaneously.

[0054] Furthermore, the first transmission device includes a first gear pair, with a first motor 100 located between the second motor 200 and the first gear pair. The first gear pair connects the first input shaft 1 and the first output shaft 2. The first output shaft 2 is located on one side of the first input shaft 1, and the first input shaft 1 and the first output shaft 2 are arranged parallel to each other. The first output shaft 2 is connected to the front wheel. Further, the first gear pair includes a first driving gear 11 and a first driven gear 21. The first input shaft 1 and the first driving gear 11 are coaxially arranged, and the first driven gear 21 is located on one side of the first driving gear 11. The first driven gear 21 is meshed with the first driving gear 11, and the first driven gear 21 is coaxially arranged with the first output shaft 2. The first motor 100 is connected to the first input shaft 1, and the first gear pair connects the first input shaft 1 to the first output shaft 2. The first output shaft 2 is connected to the front wheel. Therefore, the first motor 100 can transmit driving force to the first output shaft 2 through the first input shaft 1 and the first gear pair, thereby driving the front wheel to move. In addition, the first input shaft 1 and the first output shaft 2 are arranged in parallel and parallel to the length direction of the vehicle, which makes the axial space of the vehicle large and has better handling performance.

[0055] Specifically, the second transmission device includes an intermediate shaft 4 and a second output shaft 5. The intermediate shaft 4 is located on one side of the second input shaft 3, and is arranged parallel to the second input shaft 3 and the second output shaft 5. A synchronizing device 6 is installed on the intermediate shaft 4. The second output shaft 5 is coaxially arranged with the second input shaft 3 and is connected to the rear wheel. The intermediate shaft 4 is located between the second input shaft 3 and the second output shaft 5, and it serves to transmit torque between them. The synchronizing device 6 is installed on the intermediate shaft 4 to change the rotational speed during torque transmission, thereby achieving better fuel economy for the vehicle.

[0056] Furthermore, the second transmission device also includes a second gear pair, a third gear pair, and a fourth gear pair. The second gear pair is connected to the second input shaft 3, and the second input shaft 3 is connected to the intermediate shaft 4 through the second gear pair. The synchronizing device 6 can engage or disengage with the second driven wheel 41 of the second gear pair. The third gear pair is connected to the second input shaft 3, and the second gear pair is located between the first gear pair and the third gear pair. The synchronizing device 6 can engage or disengage with the third driven wheel 42 of the third gear pair. The fourth gear pair is connected to the second output shaft 5, and the third gear pair is located between the fourth gear pair and the second gear pair. Controlling the synchronizing device 6 allows it to engage with one of the second or third gear pairs to change the transmission ratio between the intermediate shaft 4 and the second output shaft 5. Furthermore, the second driving gear 31 of the second gear pair and the third driving gear 32 of the third gear pair are coaxially arranged with the second input shaft 3, the second driven gear 41 is meshed with the second driving gear 31, the third driven gear 42 is meshed with the third driving gear 32, the second driven gear 41, the third driven gear 42 and the fourth driving gear 43 of the fourth gear pair are coaxially arranged with the intermediate shaft 4, the fourth driving gear 43 is meshed with the fourth driven gear 53 of the fourth gear pair, and the fourth driven gear 53 is coaxially arranged with the second output shaft 5.

[0057] Furthermore, the first input shaft 1, the second input shaft 3, and the second output shaft 5 are located on the first axis, the first output shaft 2 is located on the second axis, and the intermediate shaft 4 is located on the third axis. The first, second, and third axes are parallel to the length direction of the vehicle. Furthermore, the axes of the first, second, third, and fourth gear pairs are parallel to each other, and the axes of the first, second, third, and fourth gear pairs are all set perpendicular to the width direction of the vehicle.

[0058] Furthermore, the longitudinal hybrid drive system also includes a front wheel differential 400 and a rear wheel differential 500. The front wheel differential 400 is connected to the first output shaft 2 and the front wheels, and the rear wheel differential 500 is connected to the second output shaft 5 and the rear wheels. The front wheel differential 400 and the rear wheel differential 500 are used to ensure power transmission between the front and rear wheels under various motion conditions.

[0059] Furthermore, the longitudinally mounted hybrid drive system also includes a battery 600, which is electrically connected to at least one of the first motor 100 and the second motor 200. The battery 600 supplies power to the first motor 100 and the second motor 200, enabling them to function as drive motors. The first motor 100 and the second motor 200 can also charge the battery 600, in which case they function as generators.

[0060] Furthermore, the output torques of the first motor 100, the second motor 200, and the engine 300 can be arbitrarily combined to ensure that at least one of the front and rear wheels receives the combined total driving torque. The first motor 100 and the second motor 200 can be used as drive motors or generators. The first motor 100 can generate driving force using stored electrical energy, which can be output through a first gear pair, or through a second and fourth gear pair. The second motor 200 can also generate driving force using stored electrical energy, which can be output through a first gear pair, or through a second and fourth gear pair. The driving force of the engine 300 can be output through a first gear pair, or through a second and fourth gear pair. The three power sources—the first motor 100, the second motor 200, and the engine 300—can be freely decoupled and arbitrarily combined to superimpose driving forces and output power. The first motor 100 can generate electricity using braking force to store electrical energy for the vehicle; the second motor 200 can generate electricity using the driving force transmitted by the engine 300 to store electrical energy for the vehicle.

[0061] According to another specific embodiment of the present invention, a vehicle is provided, including the longitudinally mounted hybrid drive system of the above embodiments.

[0062] In this embodiment, the vehicle includes multiple operating modes, including: pure electric drive mode, series range extender mode, engine direct drive two-wheel drive mode, engine two-wheel drive charging and discharging mode, four-wheel drive mode, brake energy recovery mode, and idle charging mode. Different modes can be selected according to different usage scenarios of the hybrid vehicle to achieve a better optimal combination of power and economy. The above operating modes of the longitudinally mounted hybrid drive system are as follows:

[0063] (1) Pure electric drive mode

[0064] like Figure 2 , Figure 3As shown, in pure electric drive mode, suitable for starting and low-speed driving conditions, with the battery fully charged, the battery 600 provides electrical energy to the first motor 100. The first motor 100 converts the electrical energy into driving force and transmits it to the first input shaft 1. The power is then transmitted to the first output shaft through the first gear pair, and then to the front wheels of the vehicle through the front wheel differential 400, thus outputting power. This is the pure electric front-wheel drive mode. Based on this, by controlling the engagement of the clutch active end 71 and the second driven end 73, the second motor 200 is connected to the first input shaft 1. At this time, the second motor 200 rotates but does not work. The first motor 100 can simultaneously transmit driving force to the second input shaft 3, and then transmit power to the second intermediate shaft 4 through the second gear pair and the synchronization device 6. The power is then transmitted to the second output shaft 5 through the fourth gear pair, and then to the rear wheels of the vehicle through the rear wheel differential 500. Power is output from both the front and rear wheels simultaneously. The pure electric four-wheel drive mode is switched as needed according to road conditions, improving the overall vehicle handling.

[0065] (2) Series extension mode

[0066] like Figure 4 As shown, the series extended range mode is used for low-speed driving conditions. When the battery is depleted, the clutch driving end 71 engages with the first driven end 72, so that the driving force of the engine 300 is transmitted to the second motor 200. The second motor 200 is used as a generator at this time, converting power into electrical energy and storing it in the battery 600. The battery 600 provides electrical energy to the first motor 100, which converts the electrical energy into driving force and transmits it to the first input shaft 1. The power is then transmitted to the first output shaft 2 through the first gear pair, and then transmitted to the front wheels of the vehicle through the front wheel differential device 400 to output the power.

[0067] (3) Engine direct drive two-wheel drive mode

[0068] like Figure 5 As shown, the engine direct drive two-wheel drive mode is suitable for high-speed driving conditions. In the engine direct drive two-wheel drive mode, the clutch driving end 71 is engaged with the first driven end 72, and the engine 300 is connected to the second motor 200. At this time, the second motor 200 rotates but does not work. The driving force of the engine 300 is transmitted to the second input shaft 3, and then the power is transmitted to the intermediate shaft 4 through the second gear pair and the synchronization device 6. Then the power is transmitted to the second output shaft 5 through the fourth gear pair, and then transmitted to the rear wheels of the vehicle through the rear wheel differential device 500. The power is output from the rear wheels.

[0069] like Figure 6As shown, depending on road conditions, the synchronization device 6 can be switched to engage with the third driven wheel 42 of the third gear pair. Power is then transmitted to the intermediate shaft 4 via the third gear pair and the synchronization device 6, and then to the second output shaft 5 via the fourth gear pair. Finally, the power is transmitted to the rear wheels of the vehicle via the rear wheel differential device 500, with power output from the rear wheels. This enables engine direct drive and rear-wheel drive modes with different speed ratios, resulting in better fuel economy for the entire vehicle.

[0070] (4) Engine two-wheel drive charging and discharging mode

[0071] like Figure 7 As shown, in the engine direct drive two-wheel drive mode, the second motor 200 can be adjusted according to the vehicle's power demand, so that the second motor 200 can be used as a generator to convert the driving force of the engine 300 into electrical energy and store it in the battery 600.

[0072] like Figure 8 As shown, in engine direct drive two-wheel drive mode, the second motor 200 can be adjusted according to the vehicle's power requirements, allowing it to be used as a drive motor. This converts electrical energy into driving force, which is then combined with the driving force of the engine 300 to drive the vehicle. The driving force from the engine 300 and the second motor 200 is transmitted to the second input shaft 3, then through the second gear pair and the synchronizing device 6 to the intermediate shaft 4, and finally through the fourth gear pair to the second output shaft 5. The power is then transmitted to the rear wheels of the vehicle via the rear wheel differential device 500, and the power is output from the rear wheels.

[0073] (5) Four-wheel drive mode

[0074] like Figure 9 As shown, the four-wheel drive mode is suitable for high-speed driving, high-throttle operation, and getting out of trouble. In four-wheel drive mode, the clutch active end 71 is engaged with the first driven end 72 and the second driven end 73. At this time, the first motor 100 and the second motor 200 rotate but do not work. The driving force of the engine 300 is transmitted to the second input shaft 3, and then to the intermediate shaft 4 through the second gear pair and the synchronizing device 6. The power is then transmitted to the second output shaft 5 through the fourth gear pair, and then to the rear wheels of the vehicle through the rear wheel differential device 500. At the same time, the driving force of the engine 300 is transmitted to the first input shaft 1, and then to the first output shaft 2 through the first gear pair. The power is then transmitted to the front wheels of the vehicle through the front wheel differential device 400. The driving force of the engine 300 is output from the front wheels and the rear wheels at the same time, which improves the overall driving and handling performance of the vehicle.

[0075] like Figure 10As shown, the control of the first motor 100 can be adjusted according to the overall vehicle power requirements, so that the first motor 100 is used as a drive motor. The battery 600 supplies power to the first motor 100, which converts electrical energy into driving force. The clutch driving end 71 engages with the first driven end 72 and the second driven end 73, connecting the engine 300 and the second motor 200. The second motor is connected to the first input shaft 1, so the driving force of the engine 300 is transmitted to the second input shaft 3, and then to the intermediate shaft 4 through the second gear pair and the synchronizing device 6. The power is then transmitted to the second output shaft 5 through the fourth gear pair, and then to the rear wheels of the vehicle through the rear wheel differential device 500. Simultaneously, the driving force of the engine 300 is transmitted to the first input shaft 1, and the driving force of the first motor 100 is also transmitted to the first input shaft 1. The power is transmitted to the first output shaft 2 through the first gear pair, and then to the front wheels of the vehicle through the front wheel differential device 400. The first motor 100 is used as a drive motor, and the driving force of the engine 300 is superimposed to drive the vehicle together.

[0076] like Figure 11 As shown, the control of the first motor 100 and the second motor 200 can be adjusted according to the power requirements of the vehicle, so that the first motor 100 and the second motor 200 are used as drive motors, converting electrical energy into driving force, which is superimposed with the driving force of the engine 300 to drive the vehicle together.

[0077] By controlling the engagement state of the clutch driving end 71, the first driven end 72, and the second driven end 73, the front and rear wheels can be output at the same speed, ensuring that the vehicle can get out of trouble smoothly.

[0078] (6) Braking energy recovery mode

[0079] like Figure 12 As shown, the regenerative braking mode is used for deceleration or regenerative braking conditions. In the regenerative braking mode, the braking force is transmitted from the front wheel tire end to the first output shaft 2 through the front wheel differential device 400, and then the power is transmitted to the first input shaft 1 through the first gear pair. The first motor 100 is used as a generator at this time to convert the power into electrical energy and store it in the battery 600.

[0080] (7) Idle charging mode

[0081] like Figure 13 As shown, the idle charging mode is suitable for vehicle parking and stopping conditions, battery depletion, engine 300 operation. In idle charging mode, clutch active end 71 engages with first driven end 72, and the driving force of engine 300 is transmitted to second motor 200. Second motor 200 is used as generator at this time to convert power into electrical energy and store it in battery 600.

[0082] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0083] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0084] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A longitudinal hybrid drive system characterized by, The utility model relates to an engine (300);Second motor (200), second motor (200) with engine (300) between through the clutch (7) connection, wherein, the clutch (7) has the driving end (71), first driven end (72) and second driven end (73), the driving end (71) is connected with second motor (200), first driven end (72) is connected with the output end of engine (300), second driven end (73) is connected with first input shaft (1), the output end of second motor (200) is connected with the first end of second input shaft (3), and the second end of second input shaft (3) is connected with rear wheel through second transmission device; First motor (100), the output end of first motor (100) is connected with the first end of first input shaft (1), and first input shaft (1) is sleeved on second input shaft (3), and second motor (200) is located between first motor (100) and engine (300), and the second end of first input shaft (1) is connected with front wheel through first transmission device. The first transmission device includes a first gear pair, the first motor (100) is located between the second motor (200) and the first gear pair, the first gear pair is used to connect the first input shaft (1) and a first output shaft (2), the first output shaft (2) is located on one side of the first input shaft (1), and the first input shaft (1) and the first output shaft (2) are arranged in parallel, and the first output shaft (2) is connected with the front wheel. The first gear pair includes:

2. The longitudinal hybrid drive system of claim 1, wherein, A first driving wheel (11) coaxially arranged with the first input shaft (1); 3. The longitudinally mounted hybrid drive system of claim 2, wherein, A first driven wheel (21) located on one side of the first driving wheel (11), the first driven wheel (21) is engaged with the first driving wheel (11), and the first driven wheel (21) is coaxially arranged with the first output shaft (2). The second transmission device includes: An intermediate shaft (4) arranged on one side of the second input shaft (3); 4. The longitudinally mounted hybrid drive system of claim 2, wherein, A second output shaft (5), the intermediate shaft (4) is arranged in parallel with the second input shaft (3) and the second output shaft (5), a synchronization device (6) is arranged on the intermediate shaft (4), the second output shaft (5) is coaxially arranged with the second input shaft (3), and the second output shaft (5) is connected with the rear wheel. The second transmission device further includes: A second gear pair connected with the second input shaft (3), the second input shaft (3) is connected with the intermediate shaft (4) through the second gear pair, the synchronization device (6) can be combined or disconnected with a second driven wheel (41) of the second gear pair; 5. The longitudinally mounted hybrid drive system of claim 4, wherein, A third gear pair connected with the second input shaft (3), the second gear pair is located between the first gear pair and the third gear pair, and the synchronization device (6) can be combined or disconnected with a third driven wheel (42) of the third gear pair. ​ ​ A fourth gear pair is connected with the second output shaft (5), the third gear pair is located between the fourth gear pair and the second gear pair, and the synchronous device (6) is connected with one of the second gear pair and the third gear pair by controlling the synchronous device (6) to change the transmission ratio between the intermediate shaft (4) and the second output shaft (5).

6. The longitudinally mounted hybrid drive system of claim 5, wherein, The second driving wheel (31) of the second gear pair and the third driving wheel (32) of the third gear pair are coaxially arranged with the second input shaft (3) respectively, the second driven wheel (41) is in meshing connection with the second driving wheel (31), the third driven wheel (42) is in meshing connection with the third driving wheel (32), the second driven wheel (41), the third driven wheel (42) and the fourth driving wheel (43) of the fourth gear pair are coaxially arranged with the intermediate shaft (4), the fourth driving wheel (43) is in meshing connection with the fourth driven wheel (53) of the fourth gear pair, and the fourth driven wheel (53) is coaxially arranged with the second output shaft (5).

7. The longitudinally mounted hybrid drive system of claim 5, wherein, The axes of the first gear pair, the second gear pair, the third gear pair and the fourth gear pair are parallel to each other, and the axes of the first gear pair, the second gear pair, the third gear pair and the fourth gear pair are arranged perpendicularly to the direction of the vehicle width.

8. The longitudinally mounted hybrid drive system of claim 1, wherein, The longitudinal hybrid power drive system further comprises: A battery (600) is electrically connected with at least one of the first motor (100) and the second motor (200).

9. The longitudinally mounted hybrid drive system of claim 1, wherein, The output torque of the first motor (100), the second motor (200) and the engine (300) can be arbitrarily combined to obtain a combined total drive torque of at least one of the front wheels and the rear wheels.

10. A vehicle characterized by comprising: The longitudinal hybrid power drive system according to any one of claims 1 to 9.

11. The vehicle of claim 10, wherein, The vehicle comprises a plurality of working modes, and the plurality of working modes comprises: A pure electric drive mode, a series range extending mode, an engine direct drive two-wheel drive mode, an engine two-wheel drive charging and discharging mode, a four-wheel drive mode, a brake energy recovery mode and an idle charging mode.

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