Transmission system of hybrid vehicle and hybrid vehicle

Abstract

The invention relates to the field of hybrid power vehicles, in particular to a transmission system of a hybrid power vehicle and the hybrid power vehicle with the transmission system.The transmission system comprises a plurality of intermediate shafts which are coaxially arranged, the intermediate shafts are used for transmission between a power source and a gearbox, and the multiple intermediate shafts at least comprise the first intermediate shaft and the second intermediate shaft; the input end of the first intermediate shaft is at least used for being in transmission connection with a power source, the input end of the second intermediate shaft is at least used for being in transmission connection with another power source, the output end of the first intermediate shaft is in transmission connection with a first input shaft of the gearbox, and the output end of the second intermediate shaft is in transmission connection with a second input shaft of the gearbox. A plurality of intermediate shafts are arranged, the power of each power source can be transmitted to the gearbox through each intermediate shaft so as to drive a vehicle, and each intermediate shaft can correspondingly distribute the torque required to be transmitted for the working condition with a large torque requirement, so that the stress of each intermediate shaft and a bearing thereof is reduced, and abrasion and fatigue damage are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid power vehicles, and in particular to a transmission system of a hybrid power vehicle and a hybrid vehicle. Background Art

[0002] In the transmission system of hybrid vehicles, the transmission mode between the engine and the gearbox has a crucial impact on the performance of the vehicle. The existing transmission mode usually adopts a single intermediate shaft output, that is, the power of the engine and the motor is transmitted to the same intermediate shaft through the clutch. In the case of large torque output, especially for vehicles with large torque output requirements such as commercial vehicles, the bearing of the intermediate shaft is subjected to large forces, which is prone to wear and fatigue damage, and cannot well meet the needs of modern vehicles for efficient and smooth power transmission. Summary of the invention

[0003] The object of the present invention is to provide a transmission system for a hybrid vehicle and a hybrid vehicle, which reduces the torque transmitted by each intermediate shaft by setting up multiple intermediate shafts, making the vehicle's power transmission more efficient and stable, so as to solve the problems of intermediate shaft and bearing wear and fatigue damage existing in the above-mentioned single intermediate shaft drive.

[0004] To achieve the above object, the technical solution of the present invention includes:

[0005] A transmission system for a hybrid vehicle includes a plurality of coaxially arranged intermediate shafts, the intermediate shafts being used for transmission between a power source and a gearbox, the plurality of intermediate shafts including at least a first intermediate shaft and a second intermediate shaft, the input end of the first intermediate shaft being used for transmission connection to at least one of the power sources, the input end of the second intermediate shaft being used for transmission connection to at least another of the power sources, the output end of the first intermediate shaft being transmission connection to a first input shaft of the gearbox, and the output end of the second intermediate shaft being transmission connection to a second input shaft of the gearbox.

[0006] In one embodiment, the power source is an engine and a motor, and there are two intermediate shafts, namely the first intermediate shaft and the second intermediate shaft, including a first clutch, a second clutch and a planetary gear train. The first clutch is arranged between the input end of the first intermediate shaft and the engine. The planetary gear train includes three transmission parts, and the three transmission parts are respectively connected to the engine, the motor and the first intermediate shaft. The second clutch is arranged between the planetary gear train and the motor, so that the input end of the first intermediate shaft is connected to the engine through the first clutch or the planetary gear train, and the input end of the first intermediate shaft is also connected to the motor through the second clutch and the planetary gear train.

[0007] In one embodiment, the first clutch includes a first transmission plate assembly and a second transmission plate assembly of a clutch transmission, and the three transmission parts of the planetary gear train are an inner ring gear, a sun gear and a planet carrier. The inner ring gear and the first transmission plate assembly are respectively synchronously rotatably connected to the inner gear drum of the engine, the sun gear is synchronously rotatably connected to the second transmission plate assembly, and the planet carrier is synchronously rotatably connected to the first intermediate shaft, so that the first intermediate shaft is selectively transmission-connected to the engine through the first clutch or the planetary gear train with the help of the clutch transmission of the first clutch.

[0008] In one embodiment, the second clutch includes a third transmission plate assembly and a fourth transmission plate assembly of clutch transmission, the third transmission plate assembly is synchronously rotationally connected to the motor, and the fourth transmission plate assembly is synchronously rotationally connected to the sun gear, so that the first intermediate shaft is also selectively transmission-connected to the motor by means of the clutch transmission of the second clutch.

[0009] In one embodiment, there are two intermediate shafts, namely the first intermediate shaft and the second intermediate shaft, and the power source is an engine and a motor. The input end of the first intermediate shaft is transmission-connected to the engine, and the input end of the second intermediate shaft is transmission-connected to the motor, so that the power of the engine and the motor is respectively transmitted to the gearbox through the first intermediate shaft and the second intermediate shaft to realize the split-shaft drive of the dual intermediate shafts.

[0010] In one embodiment, the transmission mode of the transmission system includes any one of the following:

[0011] The first clutch and the second clutch are locked respectively, the engine and the motor form a transmission connection, and if the gearbox is not transmitting outward, the transmission system is used for idling power generation or idling start-stop;

[0012] The first clutch and the second clutch are locked respectively, and the engine and the motor form a transmission connection. If the gearbox is driven outwardly through the first input shaft or the second input shaft, the power of the engine and the motor is coupled to the first input shaft or the second input shaft that is driven outwardly, and the transmission system is used for coaxial drive.

[0013] In one embodiment, the transmission mode of the transmission system includes:

[0014] The first clutch is locked, the second clutch is released, the power of the engine is transmitted to the first intermediate shaft through the first clutch, and the power of the motor is transmitted to the second intermediate shaft, thereby realizing the split-shaft drive of the dual intermediate shafts.

[0015] In one embodiment, the transmission mode of the transmission system includes:

[0016] The first clutch is disengaged, the second clutch is locked, the power of the engine is transmitted to the first intermediate shaft through the planetary gear train, and the power of the motor is transmitted to the first intermediate shaft through the second clutch and the planetary gear train, so that the transmission system is used for differential drive.

[0017] In one embodiment, the transmission mode of the transmission system includes:

[0018] The first clutch and the second clutch are separated respectively, the transmission between the engine and the motor is disconnected, and the power of the motor is transmitted to the second intermediate shaft, thereby realizing pure electric drive.

[0019] The technical solution of the present invention also includes: a hybrid vehicle, which includes the above-mentioned transmission system.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention provides multiple intermediate shafts, and the power of each power source can be transmitted to the gearbox through each intermediate shaft to drive the vehicle. For working conditions with large torque requirements, each intermediate shaft can allocate the torque it needs to transmit accordingly, thereby reducing the stress on each intermediate shaft and its bearings, and reducing wear and fatigue damage.

[0022] 2. The first intermediate shaft is selectively connected to the engine or the motor through the first clutch, the second clutch and the planetary gear train. The first clutch and the second clutch cooperate to achieve pure electric drive, hybrid single intermediate shaft output or hybrid dual intermediate shaft output, which can meet various power output requirements according to the vehicle operating conditions and meet the needs of modern vehicles for efficient and smooth power transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of a transmission system according to an embodiment of the present invention.

[0024] Figure 2 1 is an exploded diagram of a transmission system according to an embodiment of the present invention.

[0025] Figure 3 2 is a cross-sectional view of a transmission system according to an embodiment of the present invention.

[0026] Figure 4 yes Figure 3 A partial enlarged view of .

[0027] Figure 5 Schematic diagram of the transmission system layout of an embodiment of the present invention.

[0028] Figure 6It is a schematic diagram of the idle start-stop state of the transmission system of an embodiment of the present invention.

[0029] Figure 7 It is a schematic diagram of the idle power generation state of the transmission system of an embodiment of the present invention.

[0030] Figure 8 It is a schematic diagram of driving the first intermediate shaft in a hybrid state of a transmission system according to an embodiment of the present invention.

[0031] Fig. 9 It is a schematic diagram of the second intermediate shaft driving in the hybrid state of the transmission system of an embodiment of the present invention.

[0032] Fig.10 It is a schematic diagram of split-shaft drive in a hybrid state of a transmission system according to an embodiment of the present invention.

[0033] Fig.11 It is a schematic diagram of the split-shaft drive of the gearbox in the hybrid state according to an embodiment of the present invention.

[0034] Fig.12 It is a schematic diagram of differential drive in a hybrid state of a transmission system according to an embodiment of the present invention.

[0035] Fig.13 Schematic diagram of a pure electric drive transmission system according to an embodiment of the present invention.

[0036] Wherein: 1 first transmission disc assembly, 2 second transmission disc assembly, 3 third transmission disc assembly, 4 fourth transmission disc assembly, 5 internal gear drum, 6 clutch bracket, 7 housing;

[0037] 10 intermediate shaft, 11 first intermediate shaft, 12 second intermediate shaft, 20 power source, 30 gearbox, 301 first input shaft, 302 second input shaft, 40 planetary gear train;

[0038] E engine, M motor, M1 rotor, CL1 first clutch, CL2 second clutch, R ring gear, S sun gear, C planet carrier. DETAILED DESCRIPTION

[0039] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0040] Example 1

[0041] See also Figures 1 to 5As shown, the present embodiment discloses a transmission system of a hybrid vehicle, including a plurality of intermediate shafts 10 arranged coaxially, the intermediate shafts 10 are used for transmission between a power source 20 and a gearbox 30, the power source 20 is an engine E and a motor M for example, there are two intermediate shafts 10, namely a first intermediate shaft 11 and a second intermediate shaft 12, the input end of the first intermediate shaft 11 is at least used for transmission connection to the engine E, the input end of the second intermediate shaft 12 is at least used for transmission connection to the motor M, the output end of the first intermediate shaft 11 is transmission connected to a first input shaft 301 of the gearbox 30, and the output end of the second intermediate shaft 12 is transmission connected to a second input shaft 302 of the gearbox 30. The first intermediate shaft 11 and the second intermediate shaft 12 can transmit the power of the engine E and the motor M respectively, the input torque of the gearbox is increased, so that the vehicle accelerates faster and has stronger power, and through the cooperation of the two input shafts of the gearbox 30, the two input shafts can be switched when shifting, which can improve the smoothness of shifting.

[0042] In this embodiment, the first intermediate shaft 11 and the first input shaft 301 of the gearbox 30 are integrally connected, and the second intermediate shaft 12 and the second input shaft 302 of the gearbox 30 are integrally connected, thereby simplifying the transmission between the intermediate shaft 10 and the gearbox 30, and making the transmission more reliable and more efficient. In other embodiments, the first intermediate shaft 11 and the first input shaft of the gearbox 30 can be connected separately, for example, the two are connected by a mechanism such as a coupling, a spline or a gear that can make the two rotate synchronously; accordingly, the second intermediate shaft 12 and the second input shaft of the gearbox 30 can also be connected separately, for example, the two are connected by a mechanism such as a coupling, a spline or a gear that can make the two rotate synchronously.

[0043] The transmission system also includes a housing 7 and a first clutch CL1, a second clutch CL2 and a planetary gear train 40 arranged in the housing 7. The first clutch CL1 is arranged between the input end of the first intermediate shaft 11 and the engine E. The planetary gear train 40 includes three transmission parts, and the three transmission parts are respectively connected to the engine E, the motor M and the first intermediate shaft 11. The second clutch CL2 is transmission-arranged between the planetary gear train 40 and the motor M, so that the input end of the first intermediate shaft 11 is transmission-connected to the engine E through the first clutch CL1 or the planetary gear train 40, and the input end of the first intermediate shaft 11 is also transmission-connected to the motor M through the second clutch CL2 and the planetary gear train 40.

[0044] By setting two clutches, the input end of the first intermediate shaft 11 can be selectively connected to the engine E or the motor M, and the first clutch CL1 and the planetary gear train 40 form an electric torque converter to replace the traditional hydraulic torque converter, which can improve the response speed of the transmission system and improve the vehicle's acceleration performance.

[0045] In this embodiment, the first intermediate shaft 11 is arranged inside the second intermediate shaft 12, and the second intermediate shaft 12 is directly connected to the motor M, that is, the second intermediate shaft 12 and the rotor M1 of the motor M rotate synchronously, and there is no other transmission mechanism between the two that will change their transmission mode (such as a clutch transmission mechanism that cuts off the power transmission between the second intermediate shaft 12 and the motor M, or a planetary gear train, a gear set, etc., which will change its transmission ratio). The space inside the motor rotor can be used to arrange the first clutch CL1, the second clutch CL2, the planetary gear train 40 and the first intermediate shaft 11 and other components. The first intermediate shaft 11 is coaxially arranged inside the second intermediate shaft 12, so that the motor rotor M1 is connected to the outside of the second intermediate shaft 12. The first intermediate shaft 11 and the second intermediate shaft 12 extend out of the housing 7 to form the first input shaft 301 and the second input shaft 302 of the gearbox 30.

[0046] In addition, the direct transmission connection between the motor M and the second intermediate shaft 12 makes the transmission efficiency of the two higher. In other embodiments, the motor M and the second intermediate shaft 12 can also be indirectly connected.

[0047] The first clutch CL1 includes a first transmission plate assembly 1 and a second transmission plate assembly 2 of a clutch transmission. The three transmission parts of the planetary gear train 40 are an inner ring gear R, a sun gear S and a planet carrier C. The inner ring gear R and the first transmission plate assembly 1 are respectively synchronously rotatably connected to the inner gear drum 5 of the engine E, the sun gear S is synchronously rotatably connected to the second transmission plate assembly 2, and the planet carrier C is synchronously rotatably connected to the first intermediate shaft 11, so that the first intermediate shaft 11 is selectively connected to the engine E through the first clutch CL1 or the planetary gear train 40 with the help of the clutch transmission of the first clutch CL1.

[0048] The second clutch CL2 includes a third transmission disc assembly 3 and a fourth transmission disc assembly 4 of clutch transmission. The third transmission disc assembly 3 is synchronously rotationally connected to the motor M, and the fourth transmission disc assembly 4 is synchronously rotationally connected to the sun gear S, so that the first intermediate shaft 11 is also selectively transmission-connected to the motor M by means of the clutch transmission of the second clutch CL2.

[0049] More specifically: the first transmission disc assembly 1 forms a synchronous rotation connection through the transmission teeth on the circumferential outer side and the inner side of the inner gear drum 5, the second transmission disc assembly 2 is mounted on the clutch bracket 6, and the clutch bracket 6 is synchronously connected to the sun gear S. When the first transmission disc assembly 1 and the second transmission disc assembly 2 are locked to form a transmission connection, the power of the engine E is transmitted to the first intermediate shaft 11 through the inner gear drum 5, the first clutch CL1, the sun gear S, and the planet carrier C, and the inner gear drum 5 and the sun gear S rotate synchronously. Since the inner gear ring R of the planetary gear train 40 is synchronously connected to the inner gear drum 5, when the first clutch CL1 is locked, the inner gear ring R of the planetary gear train 40 and the sun gear S rotate synchronously, and the planetary gear connected to the planet carrier C does not rotate relative to the inner gear ring R and the sun gear S. The planetary gear train 40 only plays a transmission role without changing the transmission ratio. At this time, the transmission ratio between the inner gear drum 5 and the first intermediate shaft 11 is 1. When the first transmission disc assembly 1 and the second transmission disc assembly 2 of the first clutch CL1 are separated, the power of the engine E is transmitted to the first intermediate shaft 11 via the internal gear drum 5 , the internal gear ring R and the planet carrier C.

[0050] The third transmission disc assembly 3 is synchronously connected to the rotor M1 of the motor M, and the fourth transmission disc assembly 4 is installed on the clutch bracket 6. Since the clutch bracket 6 is synchronously connected to the sun gear S, when the third transmission disc assembly 3 and the fourth transmission disc assembly 4 of the second clutch CL2 are locked to form a transmission connection, the power of the motor M is transmitted to the first intermediate shaft 11 through the second clutch CL2, the sun gear S, and the planetary carrier C. When the third transmission disc assembly 3 and the fourth transmission disc assembly 4 are separated, the power of the motor M is not transmitted to the first intermediate shaft 11, but directly transmitted to the second intermediate shaft 12 that rotates synchronously with the rotor M1 of the motor. It should be noted that: since the second intermediate shaft 12 is directly connected to the rotor M1 of the motor, the power of the motor M can be transmitted to the second intermediate shaft 12 regardless of whether the second clutch CL2 is locked.

[0051] The transmission mode of the transmission system includes any of the following:

[0052] See also Figure 6 and Figure 7 As shown, the first clutch CL1 and the second clutch CL2 are locked respectively, the engine E and the motor M form a transmission connection, and if the gearbox 30 is not transmitting outward, the transmission system is used for idling power generation or idling start-stop. Figure 6 The figure shows idle start-stop, in which the power of the motor M is transmitted to the engine E through the first clutch CL1 and the second clutch CL2 to drive the engine E to start. At this time, the motor M plays the role of a traditional starter motor. Figure 7The figure shows idling power generation, where the power of the engine E is transmitted to the rotor of the motor M through the first clutch CL1 and the second clutch CL2, driving the motor M to rotate and generate electricity. At this time, the motor M acts as a generator.

[0053] See also Figures 8 to 9 As shown, the first clutch CL1 and the second clutch CL2 are locked respectively, and the engine E and the motor M form a transmission connection. If the gearbox 30 is transmitted outwardly through the first input shaft 301 or the second input shaft 302, the power of the engine E and the motor M is coupled to the first input shaft 11 or the second input shaft 12 that is transmitted outwardly, and the transmission system is used for coaxial driving. The gearbox 30 is provided with a plurality of synchronizers and gear sets. According to the vehicle working condition, the appropriate gear set is selected to select the corresponding gear position, so as to select the first input shaft 301 transmission or the second input shaft 302 transmission or the first input shaft 301 and the second input shaft 302 transmission at the same time. Figure 8 The figure shows that the gearbox 30 selects the gear position related to the first input shaft 301 and is driven by the first intermediate shaft 11. At this time, the power of the engine E and the motor M are coupled at the planetary gear train 40. Fig. 9 As shown, the gearbox 30 selects the gear position related to the second input shaft 302 and is driven by the second intermediate shaft 12 . At this time, the power of the engine E and the motor M are coupled at the second intermediate shaft 12 .

[0054] See also Figure 10 to Figure 11 As shown, the first clutch CL1 is locked, the second clutch CL2 is disengaged, the power of the engine E is transmitted to the first intermediate shaft 11 through the first clutch CL1, and the power of the motor M is transmitted to the second intermediate shaft 12, thereby realizing the split-shaft drive of the dual intermediate shafts. At this time, the power of the engine E and the motor M are coupled in the gearbox 30, and the input torque of the gearbox 30 is increased through the dual-shaft input, thereby improving the power performance of the vehicle.

[0055] See also Fig.12 As shown, the first clutch CL1 is disengaged, the second clutch CL2 is locked, the power of the engine E is transmitted to the first intermediate shaft 11 through the planetary gear train 40, and the power of the motor M is transmitted to the first intermediate shaft 11 through the second clutch CL2 and the planetary gear train 40, so that the transmission system is used for differential drive. With the help of the differential characteristics of the planetary gear train 40, stepless speed change can be achieved, and the fuel consumption during the acceleration process can be improved.

[0056] See also Fig.13 As shown, the first clutch CL1 and the second clutch CL2 are separated respectively, the transmission between the engine E and the motor M is disconnected, and the power of the motor M is transmitted to the second intermediate shaft 12, thereby realizing pure electric drive.

[0057] In addition, the transmission system can also be used for various working conditions such as kinetic energy recovery and engine E power distribution. The engine E power distribution means that part of the power of the engine E is distributed to the gearbox 30 and the other part is distributed to the motor M for power generation.

[0058] In the above embodiment, there are two power sources 20, namely an engine E and a motor M, and there are two intermediate shafts 10. In other embodiments, the number of power sources 20 can be more, such as one engine and two motors, and the number of intermediate shafts 10 can also be increased, so as to distribute more torque, each intermediate shaft bears a smaller torque and can transmit a larger torque at the same time.

[0059] Example 2

[0060] This embodiment discloses a hybrid vehicle, including the transmission system described in Embodiment 1. The structure and transmission mode of the transmission system are the same as those of Embodiment 1, and will not be described in detail here.

[0061] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. A transmission system for a hybrid vehicle, characterized in that: It comprises a plurality of intermediate shafts arranged coaxially, wherein the intermediate shafts are used for transmission between a power source and a gearbox, wherein the plurality of intermediate shafts comprises at least a first intermediate shaft and a second intermediate shaft, wherein an input end of the first intermediate shaft is used for transmission connection to at least one of the power sources, and an input end of the second intermediate shaft is used for transmission connection to at least another of the power sources, an output end of the first intermediate shaft is transmission connected to a first input shaft of the gearbox, and an output end of the second intermediate shaft is transmission connected to a second input shaft of the gearbox.

2. A hybrid vehicle transmission system according to claim 1, characterized in that: The power source is an engine and a motor, and there are two intermediate shafts, namely the first intermediate shaft and the second intermediate shaft, including a first clutch, a second clutch and a planetary gear train. The first clutch is arranged between the input end of the first intermediate shaft and the engine. The planetary gear train includes three transmission parts, and the three transmission parts are respectively connected to the engine, the motor and the first intermediate shaft. The second clutch is arranged between the planetary gear train and the motor, so that the input end of the first intermediate shaft is connected to the engine through the first clutch or the planetary gear train, and the input end of the first intermediate shaft is also connected to the motor through the second clutch and the planetary gear train.

3. A hybrid vehicle transmission system according to claim 2, characterized in that: The first clutch includes a first transmission plate assembly and a second transmission plate assembly of a clutch transmission. The three transmission parts of the planetary gear train are an inner ring gear, a sun gear and a planet carrier. The inner ring gear and the first transmission plate assembly are respectively synchronously and rotatably connected to the inner gear drum of the engine, the sun gear is synchronously and rotatably connected to the second transmission plate assembly, and the planet carrier is synchronously and rotatably connected to the first intermediate shaft, so that the first intermediate shaft is selectively connected to the engine through the first clutch or the planetary gear train by means of the clutch transmission of the first clutch.

4. A hybrid vehicle transmission system according to claim 3, characterized in that: The second clutch includes a third transmission disc assembly and a fourth transmission disc assembly of clutch transmission, the third transmission disc assembly is synchronously rotationally connected to the motor, and the fourth transmission disc assembly is synchronously rotationally connected to the sun gear, so that the first intermediate shaft is also selectively transmission-connected to the motor by means of the clutch transmission of the second clutch.

5. A hybrid vehicle transmission system according to claim 1, characterized in that: There are two intermediate shafts, namely the first intermediate shaft and the second intermediate shaft. The power sources are an engine and a motor. The input end of the first intermediate shaft is connected to the engine through transmission, and the input end of the second intermediate shaft is connected to the motor through transmission. Therefore, the power of the engine and the motor is transmitted to the gearbox through the first intermediate shaft and the second intermediate shaft respectively, so as to realize the split-shaft drive of the dual intermediate shafts.

6. A hybrid vehicle transmission system according to claim 2, characterized in that: The transmission mode of the transmission system includes any of the following: The first clutch and the second clutch are locked respectively, the engine and the motor form a transmission connection, and if the gearbox is not transmitting outward, the transmission system is used for idling power generation or idling start-stop; The first clutch and the second clutch are locked respectively, and the engine and the motor form a transmission connection. If the gearbox is driven outwardly through the first input shaft or the second input shaft, the power of the engine and the motor is coupled to the first input shaft or the second input shaft that is driven outwardly, and the transmission system is used for coaxial drive.

7. A hybrid vehicle transmission system according to claim 2, characterized in that: The transmission modes of the transmission system include: The first clutch is locked, the second clutch is released, the power of the engine is transmitted to the first intermediate shaft through the first clutch, and the power of the motor is transmitted to the second intermediate shaft, thereby realizing the split-shaft drive of the dual intermediate shafts.

8. A hybrid vehicle transmission system according to claim 2, characterized in that: The transmission modes of the transmission system include: The first clutch is disengaged, the second clutch is locked, the power of the engine is transmitted to the first intermediate shaft through the planetary gear train, and the power of the motor is transmitted to the first intermediate shaft through the second clutch and the planetary gear train, so that the transmission system is used for differential drive.

9. A hybrid vehicle transmission system according to claim 2, characterized in that: The transmission modes of the transmission system include: The first clutch and the second clutch are separated respectively, the transmission between the engine and the motor is disconnected, and the power of the motor is transmitted to the second intermediate shaft, thereby realizing pure electric drive.

10. A hybrid vehicle, characterized by comprising the transmission system according to any one of claims 1 to 9.

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