Hybrid power system, control method and vehicle

Abstract

The invention provides a hybrid power system, a control method and a vehicle, and the structure of the hybrid power system comprises an engine which is in transmission connection with the first end of a first main shaft; the generator is arranged on the first main shaft; the driving motor is in transmission connection with the first end of the second main shaft; the planet row is arranged at the second end of the first main shaft, and the planet row is in transmission connection with the second end of the second main shaft; the gear shifting mechanism is arranged on the second main shaft, and a clutch is arranged between the gear shifting mechanism and the planet row; and the differential mechanism is in transmission connection with the gear shifting mechanism. According to the hybrid power system, the control method and the vehicle, the problems that an existing hybrid power system is large in occupied space and low in transmission efficiency, and part of parts of an engine transmission path can follow up in a pure electric drive mode can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid power systems, and in particular to a hybrid power system, a control method and a vehicle. Background Art

[0002] At present, the development of hybrid power systems is relatively rapid, among which the dual-motor series-parallel configuration is more common. It is mainly composed of an engine, a generator, a drive motor, a clutch and a transmission shaft gear.

[0003] The main drawback of the existing hybrid system is that the engine and generator are connected by a parallel shaft arrangement, which takes up a large space and has a low transmission efficiency. In addition, although the clutch of the existing hybrid system is disconnected in the pure electric drive mode, the electric motor still needs to drive some parts of the engine transmission path to follow the movement. Due to the energy loss caused by the rotational inertia of the mechanical parts and the oil stirring resistance, it is not conducive to improving the cruising range. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a hybrid power system, a control method and a vehicle to solve the problem that the existing hybrid power system occupies a large space and has a low transmission efficiency, and some components of the engine transmission path will follow the movement in the pure electric drive mode.

[0005] According to a first aspect of the present invention, a hybrid power system is provided, wherein the hybrid power system includes: an engine, which is transmission-connected to the first end of a first main shaft; a generator, which is installed on the first main shaft; a drive motor, which is transmission-connected to the first end of a second main shaft; a planetary gear set, which is arranged at the second end of the first main shaft, and the planetary gear set is transmission-connected to the second end of the second main shaft; a shift mechanism, which is arranged on the second main shaft, and a clutch is arranged between the shift mechanism and the planetary gear set; and a differential, which is transmission-connected to the shift mechanism.

[0006] Preferably, the planetary gear comprises: a sun gear connected to the generator; a planet carrier drivingly connected to the sun gear, the planet carrier being connected to the second end of the first main shaft; and an outer ring gear drivingly connected to the planet carrier, the outer ring gear being connected to the second end of the second main shaft.

[0007] Preferably, the second end of the second main shaft is connected to the transmission gear bearing, the transmission gear is transmission-connected to the outer gear ring, the clutch is arranged at the second end of the second main shaft, and when the clutch is engaged, the transmission gear is transmission-connected to the second main shaft.

[0008] Preferably, the shift mechanism includes: a first gear input gear, which is arranged on the second main shaft; a second gear input gear, which is arranged on the second main shaft; a transmission shaft, which is drivingly connected to the differential; a first gear output gear, which is installed on the transmission shaft through a bearing, and the first gear output gear is meshed with the first gear input gear; a second gear output gear, which is installed on the transmission shaft through a bearing, and the second gear output gear is meshed with the second gear input gear; and a synchronizer, which is arranged on the transmission shaft, and the synchronizer is installed between the first gear output gear and the second gear output gear, and the synchronizer can be selectively combined with the first gear output gear or the second gear output gear.

[0009] Preferably, the first main shaft, the second main shaft and the transmission shaft are arranged in parallel.

[0010] According to a second aspect of the present invention, a control method for a hybrid power system is provided, wherein the hybrid power system is a hybrid power system as described above, and the control method for the hybrid power system includes: operating one or more of the engine, the generator and the drive motor, and controlling the combination of the clutch and the synchronizer at the same time, so as to realize multiple operating modes.

[0011] Preferably, the multiple operating modes include a pure electric drive mode. In the pure electric drive mode, the clutch is disconnected, the battery powers the drive motor, the drive motor transmits power to the shift mechanism through the second main shaft, the synchronizer is combined with the first gear output gear or the second gear output gear, and finally the power is transmitted to the differential through the transmission shaft.

[0012] Preferably, the multiple working modes include an engine direct drive mode, in which the clutch is closed, the engine transmits power to the planetary gear through the first main shaft, the planetary gear transmits power to the shift mechanism through the second main shaft, the synchronizer is combined with the first gear output gear or the second gear output gear, and finally the power is transmitted to the differential through the transmission shaft.

[0013] Preferably, the multiple operating modes include a series mode, in which the clutch is disconnected, the engine drives the generator to power the battery, the battery powers the drive motor, the drive motor transmits power to the shift mechanism through the second main shaft, the synchronizer is combined with the first gear output gear or the second gear output gear, and finally the power is transmitted to the differential through the transmission shaft.

[0014] Preferably, the multiple working modes include a parallel mode, in which the clutch is closed, the engine drives the generator to power the battery, and at the same time the engine transmits power to the planetary gear through the first main shaft, and the planetary gear transmits power to the shift mechanism through the second main shaft, the battery powers the drive motor, and the drive motor transmits power to the shift mechanism through the second main shaft, the synchronizer is combined with the first gear output gear or the second gear output gear, and finally the power is transmitted to the differential through the transmission shaft.

[0015] Preferably, the multiple working modes include an energy recovery mode. In the energy recovery mode, the clutch is disengaged, power is transmitted from the differential to the drive shaft, the synchronizer is combined with the first gear output gear or the second gear output gear, the drive shaft transmits power to the second main shaft, and finally the power is transmitted to the drive motor and converted into electrical energy by the drive motor and stored in the battery.

[0016] Preferably, when the vehicle encounters a working condition with power demand, the clutch is engaged, the drive motor transmits power to the second main shaft, the engine transmits power to the planetary carrier through the first main shaft, the generator transmits power to the sun gear, the power of the engine and the power of the generator are transmitted to the second main shaft through the outer ring gear, and merged with the power of the drive motor, the synchronizer is engaged with the first gear output gear or the second gear output gear, so that the power on the second main shaft is transmitted to the transmission shaft, and finally the power on the transmission shaft is transmitted to the differential.

[0017] According to a third aspect of the present invention, a vehicle is provided, wherein the vehicle includes the hybrid power system as described above.

[0018] The hybrid power system, control method and vehicle of the embodiment of the present invention, wherein the engine and the generator are both installed on the first main shaft, so that the difficulty of developing components is reduced and lubrication requirements are easily met. Such an arrangement can also improve the transmission efficiency of the power generation path, reduce the layout space, and improve the performance of the whole vehicle. The drive motor is arranged on the second main shaft, and a clutch is arranged between the first main shaft and the second main shaft, so that the engine can be decoupled from the drive motor power. When the clutch is disconnected in the pure electric drive mode, the mechanical components of the engine transmission path will not follow, thereby reducing energy loss and improving the cruising range. In addition, the second main shaft and the differential are connected by a shifting mechanism, so that the vehicle has multiple gears to choose from, which greatly improves the power and economy of the whole vehicle. This can effectively solve the problem that the existing hybrid power system occupies a large space and has a low transmission efficiency, and some components of the engine transmission path will follow in the pure electric drive mode.

[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic diagram of a hybrid power system according to the present invention.

[0022] Figure numerals: 1-engine; 2-generator; 3-drive motor; 4-planetary gear; 41-sun gear; 42-planet carrier; 43-outer ring gear; 5-shift mechanism; 51-first gear input gear; 52-second gear input gear; 53-first gear output gear; 54-second gear output gear; 55-synchronizer; 6-differential; 7-clutch; 8-transmission gear; 100-first main shaft; 200-second main shaft; 300-transmission shaft; 400-connecting shaft. DETAILED DESCRIPTION

[0023] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0024] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0025] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0026] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0027] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0028] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0029] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0030] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0031] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0032] like Figure 1 As shown, according to a first aspect of the present invention, a hybrid power system is provided, which includes an engine 1 , a generator 2 , a drive motor 3 , a planetary gear 4 , a shift mechanism 5 and a differential 6 .

[0033] In the following description, reference will be made to Figure 1 The specific structures of the above components of the hybrid power system and the connection relationship of the above components are described in detail.

[0034] like Figure 1 As shown, in the embodiment, the engine 1 can be connected to the first end of the first main shaft 100 (which can be Figure 1 The generator 2 can be installed on the first main shaft 100. The generator 2 is coaxially arranged with the engine 1, which reduces the difficulty of developing parts and components and facilitates lubrication requirements. Such an arrangement can also improve the transmission efficiency of the power generation path, reduce the layout space, and improve the performance of the vehicle. The drive motor 3 can be connected to the first end of the second main shaft 200 (which can be as shown in FIG. Figure 1 The planetary gear 4 can be arranged at the second end of the first main shaft 100 (which can be as shown in FIG. Figure 1 The planetary gear 4 can be connected to the second end of the second main shaft 200 (which can be Figure 1The first main shaft 100 is connected to the second main shaft 200 by transmission (as shown in the right end), so that the first main shaft 100 can be connected to the second main shaft 200 by transmission. The second main shaft 200 can also be provided with a shift mechanism 5, so that the vehicle has multiple gears to choose from, thereby improving the power and economy of the whole vehicle. The differential 6 can be connected to the shift mechanism 5 by transmission, and the power can be transmitted to the half shaft through the differential 6 to drive the wheels of the vehicle. In addition, a clutch 7 is also provided between the shift mechanism 5 and the planetary gear 4, so that the engine 1 can be decoupled from the power of the drive motor 3. When the clutch 7 is disconnected in the pure electric drive mode, the mechanical parts of the transmission path of the engine 1 will not follow, thereby reducing energy loss and improving the cruising range.

[0035] Preferably, Figure 1 As shown, in the embodiment, the first main shaft 100 and the second main shaft 200 can be arranged in parallel to reduce the axial length of the hybrid power system. The first end of the first main shaft 100 can be connected to the engine 1 through a key, the first main shaft 100 can be inserted into the generator 2, and the second end of the first main shaft 100 can be connected to the planetary gear 4. So that the engine 1 and the generator 2 can both output power to the planetary gear 4 (the generator 2 can be controlled to be used as a drive motor). The shift mechanism 5 is arranged in the middle of the second main shaft 200. The power of the drive motor 3 can be transmitted to the shift mechanism 5 from the first end of the second main shaft 200, and the power of the planetary gear 4 can be transmitted to the shift mechanism 5 from the second end of the second main shaft 200. After the transmission ratio is adjusted by the shift mechanism 5, the final power is transmitted to the differential 6. Preferably, the shift mechanism 5 and the differential 6 can be connected by shaft gear transmission.

[0036] Preferably, Figure 1 As shown, in an embodiment, the planetary gear 4 may include a sun gear 41, a planet carrier 42 and an outer gear ring 43. The sun gear 41 may be rigidly connected to the generator 2, and specifically, may be keyed. The planet carrier 42 may mesh with the sun gear 41 to achieve transmission. The planet carrier 42 may be rigidly connected to the second end of the first main shaft 100, and specifically, may be keyed. The outer gear ring 43 may mesh with the planet carrier 42 to achieve transmission. The outer gear ring 43 may be transmission-connected to the second end of the second main shaft 200, so as to transmit power to the second main shaft 200.

[0037] Further, preferably, Figure 1As shown, in the embodiment, a transmission gear 8 may be further provided on the second main shaft 200, and the transmission gear 8 may be provided at the second end of the second main shaft 200. Preferably, the second end of the second main shaft 200 may be connected to the transmission gear 8 bearing. The transmission gear 8 may mesh with the outer gear ring 43 to achieve transmission. The clutch 7 may also be provided at the second end of the second main shaft 200. The clutch 7 may cooperate with the transmission gear 8. When the clutch 7 is engaged, the transmission gear 8 may be connected to the second main shaft 200 in a transmission manner, thereby enabling power to be transmitted from the planet carrier 42 to the second main shaft 200.

[0038] Preferably, Figure 1 As shown, in the embodiment, the shift mechanism 5 may include a first gear input gear 51, a second gear input gear 52, a transmission shaft 300, a first gear output gear 53, a second gear output gear 54 and a synchronizer 55. The first gear input gear 51 and the second gear input gear 52 may be key-connected to the second main shaft 200, and the first gear input gear 51 and the second gear input gear 52 may be arranged at intervals. The transmission shaft 300 may be connected to the differential 6 through shaft gear transmission. The synchronizer 55 is arranged on the transmission shaft 300. The first gear output gear 53 and the second gear output gear 54 may be mounted on the transmission shaft 300 through bearings, and the synchronizer 55 is installed between the first gear output gear 53 and the second gear output gear 54. The first gear output gear 53 meshes with the first gear input gear 51, the second gear output gear 54 meshes with the second gear input gear 52, and the synchronizer 55 can selectively engage with the first gear output gear 53 or the second gear output gear 54 to change the transmission ratio between the second main shaft 200 and the transmission shaft 300. In this way, the vehicle has two gears to choose from, which greatly improves the power and economy of the whole vehicle.

[0039] Further, preferably, Figure 1 As shown, in the embodiment, the transmission shaft 300 can be arranged in parallel with the first main shaft 100 and the second main shaft 200. A connecting shaft 400 can also be arranged between the transmission shaft 300 and the differential 6, and the connecting shaft 400 can be arranged in parallel with the transmission shaft 300. The transmission shaft 300 and the connecting shaft 400 can be connected by a gear pair, and a bevel gear can be arranged at the end of the connecting shaft 400 for connecting with the differential 6, so as to transmit the power on the transmission shaft 300 to the differential 6 to drive the wheels of the vehicle to rotate.

[0040] In addition, according to the second aspect of the present invention, a control method for a hybrid power system is provided, and the hybrid power system is the hybrid power system in the above-mentioned embodiment. The control method for the hybrid power system includes: making one or more of the engine 1, the generator 2 and the drive motor 3 work, and controlling the combination of the clutch 7 and the synchronizer 55 at the same time, so as to realize multiple working modes.

[0041] Specifically, preferably, in an embodiment, the multiple working modes may include a pure electric drive mode. In the pure electric drive mode, the clutch 7 may be disconnected. The battery (not shown) of the vehicle may power the drive motor 3, and the drive motor 3 transmits power to the shift mechanism 5 through the second main shaft 200. The synchronizer 55 may be combined with the first gear output gear 53 or the second gear output gear 54 to adjust the transmission ratio between the second main shaft 200 and the transmission shaft 300. Finally, the power is transmitted to the differential 6 through the transmission shaft 300 to drive the wheels of the vehicle to rotate.

[0042] Preferably, in the embodiment, the multiple working modes may also include an engine direct drive mode. In the engine direct drive mode, the clutch 7 may be closed to connect the planetary gear 4 to the second main shaft 200. The engine 1 may transmit power to the planetary carrier 42 of the planetary gear 4 through the first main shaft 100, and the outer gear ring 43 of the planetary gear 4 transmits power to the shift mechanism 5 through the second main shaft 200. The synchronizer 55 may be combined with the first gear output gear 53 or the second gear output gear 54 to adjust the transmission ratio between the second main shaft 200 and the transmission shaft 300. Finally, the power is transmitted to the differential 6 through the transmission shaft 300 to drive the wheels of the vehicle to rotate.

[0043] Preferably, in an embodiment, the multiple working modes may further include a series mode. In the series mode, the clutch 7 may be disconnected. The engine 1 may drive the generator 2 to supply power to the battery. The battery may supply power to the drive motor 3. The drive motor 3 transmits power to the shift mechanism 5 through the second main shaft 200. The synchronizer 55 may be combined with the first gear output gear 53 or the second gear output gear 54 to adjust the transmission ratio between the second main shaft 200 and the transmission shaft 300. Finally, the power is transmitted to the differential 6 through the transmission shaft 300 to drive the wheels of the vehicle to rotate.

[0044] Preferably, in the embodiment, the multiple working modes may also include a parallel mode. In the parallel mode, the clutch 7 may be closed. The engine 1 may drive the generator 2 to supply power to the battery, and the engine 1 may also transmit power to the planetary carrier 42 of the planetary gear 4 through the first main shaft 100. The planetary carrier 42 of the planetary gear 4 may transmit power to the shift mechanism 5 through the second main shaft 200. The battery may supply power to the drive motor 3, and the drive motor 3 may transmit power to the shift mechanism 5 through the second main shaft 200. The power of the engine 1 and the power of the drive motor 3 merge at the second main shaft 200, and the synchronizer 55 may be combined with the first gear output gear 53 or the second gear output gear 54 to adjust the transmission ratio between the second main shaft 200 and the transmission shaft 300. Finally, the power is transmitted to the differential 6 through the transmission shaft 300 to drive the wheels of the vehicle to rotate.

[0045] Preferably, in an embodiment, the multiple working modes may further include an energy recovery mode. In the energy recovery mode, the clutch 7 may be disconnected. The power is transmitted from the differential 6 to the transmission shaft 300, and the synchronizer 55 may be combined with the first gear output gear 53 or the second gear output gear 54, so that the power on the transmission shaft 300 can be transmitted to the second main shaft 200. Finally, the power is transmitted to the drive motor 3 through the second main shaft 200, and is converted into electrical energy by the drive motor 3 and stored in the battery (the drive motor 3 may be controlled to be used as a generator). At the same time, during the start-up process of the engine 1, the generator 2 may drive the engine 1 in reverse until the engine 1 reaches a stable operating speed.

[0046] More preferably, in the embodiment, when the vehicle encounters a working condition with a high power demand (such as when rapid acceleration or escape is required), the clutch 7 can be engaged. The drive motor 3 can transmit power to the second main shaft 200, while the engine 1 can transmit power to the planetary carrier 42 through the first main shaft 100, and the generator 2 can transmit power to the sun gear 41. The power of the engine 1 and the power of the generator 2 can be transmitted to the second main shaft 200 through the outer ring gear 43, and merge with the power of the drive motor 3 on the second main shaft 200. The synchronizer 55 can be combined with the first gear output gear 53 or the second gear output gear 54, so that the power on the second main shaft 200 can be transmitted to the transmission shaft 300. Finally, the power on the transmission shaft 300 is transmitted to the differential 6 to drive the wheels of the vehicle to rotate.

[0047] Furthermore, according to a third aspect of the present invention, there is provided a vehicle comprising the hybrid power system as described above.

[0048] During use, the engine 1 and the generator 2 are both installed on the first main shaft 100, so that the difficulty of developing parts is reduced and lubrication requirements are easy to meet. Such a setting can also improve the transmission efficiency of the power generation path, reduce the layout space, and improve the performance of the whole vehicle. The drive motor 3 is arranged on the second main shaft 200, and a clutch 7 is arranged between the first main shaft 100 and the second main shaft 200, so that the engine 1 can be decoupled from the drive motor 3. When the clutch 7 is disconnected in the pure electric drive mode, the mechanical parts of the transmission path of the engine 1 will not follow, thereby reducing energy loss and improving the cruising range. In addition, the second main shaft 200 and the differential 6 are connected by a shifting mechanism 5, so that the vehicle has multiple gears to choose from, which greatly improves the power and economy of the whole vehicle.

[0049] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A hybrid power system, provided in a vehicle, characterized in that: The hybrid power system comprises: an engine, drivingly connected to the first end of the first main shaft; a generator mounted on the first main shaft; A driving motor is drivingly connected to the first end of the second main shaft; A planetary gear, disposed at the second end of the first main shaft, the planetary gear is drivingly connected to the second end of the second main shaft; A shift mechanism, arranged on the second main shaft, wherein a clutch is arranged between the shift mechanism and the planetary gear; A differential is transmission-connected with the shift mechanism.

2. The hybrid power system according to claim 1, characterized in that: The planetary gear comprises: a sun gear connected to the generator; a planet carrier, drivingly connected to the sun gear, the planet carrier being connected to the second end of the first main shaft; and The outer ring gear is transmission-connected to the planet carrier, and the outer ring gear is transmission-connected to the second end of the second main shaft.

3. The hybrid power system according to claim 2, characterized in that: The second end of the second main shaft is connected to the transmission gear bearing, the transmission gear is transmission-connected to the outer gear ring, the clutch is arranged at the second end of the second main shaft, and when the clutch is engaged, the transmission gear is transmission-connected to the second main shaft.

4. The hybrid power system according to claim 3, characterized in that: The shifting mechanism comprises: a first gear input gear, arranged on the second main shaft; A second gear input gear, arranged with the second main shaft; A transmission shaft, drivingly connected to the differential; A first gear output gear is mounted on the transmission shaft through a bearing, and the first gear output gear is meshed with the first gear input gear; A second gear output gear is mounted on the transmission shaft through a bearing, and the second gear output gear is meshed with the second gear input gear; and A synchronizer is arranged on the transmission shaft, and the synchronizer is installed between the first gear output gear and the second gear output gear. The synchronizer can be selectively combined with the first gear output gear or the second gear output gear.

5. The hybrid power system according to claim 4, characterized in that: The first main shaft, the second main shaft and the transmission shaft are arranged in parallel.

6. A control method for a hybrid power system, characterized in that: The hybrid power system is the hybrid power system according to claim 5, and the control method of the hybrid power system includes: operating one or more of the engine, the generator and the drive motor, and controlling the combination of the clutch and the synchronizer to achieve multiple working modes.

7. The control method of the hybrid power system according to claim 6, characterized in that: The multiple working modes include a pure electric drive mode. In the pure electric drive mode, the clutch is disconnected, the battery powers the drive motor, the drive motor transmits power to the shift mechanism through the second main shaft, the synchronizer is combined with the first gear output gear or the second gear output gear, and finally the power is transmitted to the differential through the transmission shaft.

8. The control method of the hybrid power system according to claim 6, characterized in that: The multiple working modes include an engine direct drive mode, in which the clutch is closed, the engine transmits power to the planetary gear through the first main shaft, the planetary gear transmits power to the shift mechanism through the second main shaft, the synchronizer is combined with the first gear output gear or the second gear output gear, and finally the power is transmitted to the differential through the transmission shaft.

9. The control method of the hybrid power system according to claim 6, characterized in that: The multiple working modes include a series mode, in which the clutch is disconnected, the engine drives the generator to power the battery, the battery powers the drive motor, the drive motor transmits power to the shift mechanism through the second main shaft, the synchronizer is combined with the first gear output gear or the second gear output gear, and finally the power is transmitted to the differential through the transmission shaft.

10. The control method of the hybrid power system according to claim 6, characterized in that: The multiple working modes include a parallel mode, in which the clutch is closed, the engine drives the generator to power the battery, and at the same time the engine transmits power to the planetary gear through the first main shaft, and the planetary gear transmits power to the shift mechanism through the second main shaft, the battery supplies power to the drive motor, and the drive motor transmits power to the shift mechanism through the second main shaft, the synchronizer is combined with the first gear output gear or the second gear output gear, and finally the power is transmitted to the differential through the transmission shaft.

11. The control method of the hybrid power system according to claim 6, characterized in that: The multiple working modes include an energy recovery mode. In the energy recovery mode, the clutch is disengaged, power is transmitted from the differential to the drive shaft, the synchronizer is combined with the first gear output gear or the second gear output gear, the drive shaft transmits power to the second main shaft, and finally the power is transmitted to the drive motor and converted into electrical energy by the drive motor and stored in the battery.

12. The control method of the hybrid power system according to claim 6, characterized in that: When the vehicle encounters a working condition with power demand, the clutch is engaged, the drive motor transmits power to the second main shaft, the engine transmits power to the planetary carrier through the first main shaft, the generator transmits power to the sun gear, the power of the engine and the power of the generator are transmitted to the second main shaft through the outer ring gear, and merged with the power of the drive motor, the synchronizer is engaged with the first gear output gear or the second gear output gear, so that the power on the second main shaft is transmitted to the transmission shaft, and finally the power on the transmission shaft is transmitted to the differential.

13. A vehicle, characterized in that: The vehicle comprises the hybrid powertrain system according to any one of claims 1 to 5.

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