Hybrid power system, driving method thereof, transmission mechanism, range extender and vehicle

Abstract

The invention provides a hybrid power system, a driving method thereof, a transmission mechanism, a range extender and a vehicle. The transmission mechanism of the hybrid power system comprises an internal combustion engine transmission assembly used for being in transmission connection with an internal combustion engine; the motor transmission assembly is in transmission connection with a motor; the wheel transmission assembly is in transmission connection with wheels; the synchronizer comprises a joint gear sleeve arranged on the motor transmission assembly, a first joint gear ring arranged on the internal combustion engine transmission assembly and a second joint gear ring arranged on the wheel transmission assembly; in the first working mode, the joint gear sleeve and the first joint gear ring are jointed and locked; in the second working mode, the joint gear sleeve is not jointed with the first joint gear ring or the second joint gear ring; and in the third working mode, the joint gear sleeve and the second joint gear ring are jointed and locked. The connection conditions of all the transmission assemblies are switched through the synchronizer, different transmission requirements are met, the switching response speed is high, the switching efficiency is high, and the driving experience of a user can be improved.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, specifically to a hybrid power system and its driving method, transmission mechanism, range extender, and vehicle. Background Technology

[0002] The powertrain system of a pure electric vehicle generally consists of three parts: a drive motor, a controller, and a power battery. Limited by the power supply characteristics of the powertrain system, pure electric vehicles typically face range anxiety during use. To alleviate range anxiety, the automotive industry has introduced hybrid electric vehicles. Hybrid electric vehicles are vehicles equipped with two power sources simultaneously—a thermal power source (generated by a conventional gasoline or diesel engine) and an electric power source (power battery and drive motor).

[0003] Among them, the range-extended hybrid electric vehicle adds an internal combustion engine and a generator to the pure electric vehicle. When the power battery is low, the internal combustion engine acts as an energy compensation device to drive the generator to generate electricity to charge the power battery and extend the vehicle's range.

[0004] Current range-extended hybrid electric vehicles (REEVs) typically include a drive motor, an internal combustion engine, and a generator. When the internal combustion engine is connected to the generator, it is solely for generating electricity and does not participate in driving the vehicle. However, current REEVs suffer from slow response times and incomplete decoupling between the internal combustion engine and generator when switching between charging and idle modes, impacting the user's driving experience. Summary of the Invention

[0005] To address the problems in the prior art, the present invention aims to provide a hybrid power system and its driving method, transmission mechanism, range extender and vehicle, thereby improving the smoothness and response speed of the hybrid power system when switching operating modes and enhancing the user's driving experience.

[0006] This invention provides a transmission mechanism for a hybrid power system in a vehicle, comprising:

[0007] An internal combustion engine transmission assembly, wherein the internal combustion engine transmission assembly is used for transmission connection with an internal combustion engine;

[0008] A motor drive assembly, the motor drive assembly being used for connection with a motor drive;

[0009] A wheel drive assembly for connection to a wheel drive;

[0010] A synchronizer, the synchronizer including an engagement toothed sleeve disposed on the motor drive assembly, a first engagement toothed ring disposed on the internal combustion engine drive assembly, and a second engagement toothed ring disposed on the wheel drive assembly;

[0011] In the first operating mode, the synchronizer's engagement sleeve engages and locks with the first engagement ring;

[0012] In the second operating mode, the synchronizer's engagement sleeve does not engage with the first engagement ring or the second engagement ring;

[0013] In the third operating mode, the synchronizer's engagement sleeve engages with and locks with the second engagement ring.

[0014] In some embodiments, the internal combustion engine transmission assembly includes a first output shaft, and the first engagement gear ring is fixedly connected to the first output shaft; the electric motor transmission assembly includes a second output shaft, and the second engagement gear ring is rotatably sleeved on the second output shaft via a bearing;

[0015] In some embodiments, the motor drive assembly further includes an input shaft, and the input shaft and the second output shaft are connected by a reduction gear set.

[0016] In some embodiments, the reduction gear set includes a planetary gear mechanism.

[0017] In some embodiments, the wheel drive assembly includes a gear rotatably mounted on a second output shaft of the motor drive assembly, the second engaging gear ring being drive-connected to or integrally formed with the gear; the wheel drive assembly further includes a differential and a half-shaft, the differential including a driven gear and a half-shaft gear, the driven gear being drive-connected to the gear, and the half-shaft gear being connected to the wheel via the half-shaft. In some embodiments, the internal combustion engine drive assembly includes a torque damper disposed between the internal combustion engine and the first engaging gear ring.

[0018] In some embodiments, a fork mechanism for the synchronizer is further included. The fork mechanism includes a fork, one end of which is fixedly connected to the engagement tooth sleeve. The fork drives the engagement tooth sleeve to engage and lock with the first engagement tooth ring, and the fork drives the engagement tooth sleeve to engage and lock with the second engagement tooth ring.

[0019] In some embodiments, a drive mechanism is further included, which drives the shift fork to move along a first direction.

[0020] This invention also provides a range extender for a hybrid power system in a vehicle, the range extender comprising:

[0021] According to any of the above-described transmission mechanisms, and

[0022] An electric motor is connected to the motor transmission assembly of the transmission mechanism.

[0023] This invention also provides a hybrid power system for a vehicle, comprising:

[0024] The range extender as described above, and

[0025] An internal combustion engine is connected to the internal combustion engine transmission assembly of the transmission mechanism of the range extender.

[0026] This invention also provides a driving method for a hybrid power system of a vehicle, for driving the hybrid power system as described above, comprising the following steps:

[0027] Receive control commands;

[0028] The hybrid power system is controlled according to the operating mode indicated by the control command, wherein the operating mode is a first operating mode, a second operating mode, and a third operating mode.

[0029] In some embodiments, when the operating mode indicated by the received control command is the first operating mode, the following steps are included:

[0030] Detect the current operating status of the hybrid power system;

[0031] When the hybrid system is detected to be in the second operating mode and the motor is not running, the engagement sleeve is controlled to engage and lock with the first engagement ring, and the internal combustion engine is controlled to run.

[0032] When the hybrid power system is detected to be in the third operating mode, the motor is controlled to enter the active short-circuit mode, and then the engagement sleeve is controlled to engage and lock with the first engagement ring, thereby controlling the operation of the internal combustion engine.

[0033] In some embodiments, when the operating mode indicated by the received control command is the second operating mode, the following steps are included:

[0034] Detect the current operating status of the hybrid power system;

[0035] When the hybrid system is detected to be in the first operating mode, the internal combustion engine is shut off, and the engagement sleeve is unlocked from the first engagement ring.

[0036] When the hybrid system is detected to be in the third operating mode, the engagement sleeve is controlled to unlock from the second engagement ring.

[0037] In some embodiments, when the operating mode indicated by the received control command is the third operating mode, the following steps are included:

[0038] Detect the current operating status of the hybrid power system;

[0039] When the hybrid system is detected to be in the first working mode, the internal combustion engine is turned off, the engagement sleeve is unlocked from the first engagement ring, and then the engagement sleeve is controlled to engage and lock with the second engagement ring.

[0040] When the hybrid power system is detected to be in the second operating mode, the engagement sleeve is controlled to engage and lock with the second engagement ring.

[0041] Embodiments of the present invention also provide a vehicle including the hybrid power system described above.

[0042] The hybrid power system, driving method, transmission mechanism, range extender, and vehicle provided by this invention have the following advantages:

[0043] When the engaging sleeve engages and locks with the first engaging gear ring, the internal combustion engine transmission assembly and the electric motor transmission assembly are connected. The internal combustion engine drives the electric motor to generate electricity, which in turn charges the battery, improving the vehicle's range. When the engaging sleeve is not locked with the first and second engaging gear rings, the internal combustion engine transmission assembly, the electric motor transmission assembly, and the wheel transmission assembly are completely decoupled, and the power system has no power output and does not generate electricity. When the engaging sleeve engages and locks with the second engaging gear ring, the electric motor transmission assembly is connected to the wheel transmission, and the electric motor drives the vehicle. By switching the transmission connection status of each transmission assembly through the engagement of the synchronizer with each transmission assembly, different transmission needs can be met, with fast response and high smoothness, improving the user's driving experience. Attached Figure Description

[0044] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0045] Figure 1 This is a schematic diagram of a hybrid power system according to an embodiment of the present invention;

[0046] Figure 2 This is a flowchart of a driving method for a hybrid power system provided in an embodiment of the present invention.

[0047] Figure label:

[0048] 10 Internal Combustion Engine Transmission Assembly 32 Differential

[0049] 11 First output shaft 321 Driven gear

[0050] 12 Torque damper 322 half-shaft gear

[0051] 20 Motor transmission assembly 33 Half shaft

[0052] 21 Input shaft 34 Idler wheel

[0053] 22 Second output shaft 40 synchronizer

[0054] 23 Reduction gear set 50 Internal combustion engine

[0055] 30 Wheel drive assembly 60 Motor

[0056] 31 Gears Detailed Implementation

[0057] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0058] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0059] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0060] It should be further understood that the terms "comprising" or "including" indicate the presence of a feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are interpreted as inclusive, or mean any one or any combination thereof. Therefore, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only arise when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0061] To address the problems in the prior art, embodiments of the present invention provide a transmission mechanism for a hybrid power system in a vehicle, such as... Figure 1 As shown, the transmission mechanism includes an internal combustion engine transmission assembly 10, an electric motor transmission assembly 20, a wheel transmission assembly 30, and a synchronizer 40.

[0062] Specifically, the internal combustion engine transmission assembly 10 is used for transmission connection with the internal combustion engine 50, the electric motor transmission assembly 20 is used for transmission connection with the electric motor 60, and the wheel transmission assembly 30 is used for transmission connection with the wheels; the synchronizer 40 includes an engagement sleeve arranged on the electric motor transmission assembly 20, a first engagement ring arranged on the internal combustion engine transmission assembly 10, and a second engagement ring arranged on the wheel transmission assembly. In a first operating mode, the engagement sleeve of the synchronizer 40 engages and locks with the first engagement ring; in a second operating mode, the engagement sleeve of the synchronizer 40 does not engage with the first engagement ring and does not engage with the second engagement ring; in a third operating mode, the engagement sleeve of the synchronizer 40 engages and locks with the second engagement ring.

[0063] When the engagement sleeve engages and locks with the first engagement ring, the internal combustion engine transmission assembly 10 and the electric motor transmission assembly 20 are connected. When the internal combustion engine 50 is running, it can transmit torque to the electric motor 60 through the internal combustion engine transmission assembly 10, generating electricity and charging the battery. When the engagement sleeve engages and locks with the second engagement ring, the electric motor transmission assembly 20 and the wheel transmission assembly 30 are connected. When the electric motor 60 is running, its output torque can be transmitted to the wheels through the wheel transmission assembly 30 to drive the vehicle. When the engagement sleeve is not engaged with either the first or second engagement ring, the internal combustion engine transmission assembly 10, the electric motor transmission assembly 20, and the wheel transmission assembly 30 are completely decoupled, the transmission mechanism has no torque output, and does not generate electricity. The synchronizer 40 can switch the transmission connection status of each transmission assembly to meet the transmission requirements of the transmission mechanism. The synchronizer 40 has a fast response speed and high switching efficiency when switching between different operating states, which can improve the user's driving experience.

[0064] For further information, please refer to [link / reference]. Figure 1 The internal combustion engine transmission assembly 10 includes a first output shaft 11, and a first engagement gear ring is rotatably fixedly connected to the first output shaft 11. The electric motor transmission assembly 20 includes a second output shaft 22, and a second engagement gear ring is rotatably mounted on the second output shaft 22 via bearings.

[0065] In this case, the splined hub of the synchronizer is fixedly mounted on the second output shaft 22 of the motor drive assembly 20 by rotation, and the engagement sleeve of the synchronizer 40 is axially movable on the splined hub.

[0066] It should be noted that for the engagement sleeve to lock with the first engagement gear ring or the second engagement gear ring, the engagement gear ring and the engagement sleeve must rotate at the same speed. When their speeds are the same, the engagement sleeve is moved axially so that the inner spline of the engagement sleeve slides into the outer spline of the engagement gear ring and engages with it, thus achieving locking.

[0067] Furthermore, the motor drive assembly 20 includes an input shaft 21, and the input shaft 21 and the second output shaft 22 are connected by a reduction gear set 23. The reduction gear set 23 is used to reduce the speed of the motor 60 and increase the output torque. In some cases, the motor drive assembly 20 may only include the second output shaft 22 directly connected to the motor 60, without including the reduction gear set 23.

[0068] In this embodiment, the reduction gear set includes only one planetary gear mechanism. In other embodiments, it may also include a multi-gear transmission mechanism composed of multiple planetary gear mechanisms, and different transmission ratios can be formed by combining different components of the planetary gear mechanism.

[0069] For further information, please refer to [link / reference]. Figure 1 The wheel drive assembly 30 includes a gear 31 rotatably mounted on the second output shaft 22 of the motor drive assembly 20. A second engaging gear ring is either driven by or integrally formed with the gear 31. The wheel drive assembly 30 also includes a differential 32 and a half-shaft 33. The differential 32 includes a driven gear 321 and a half-shaft gear 322. The driven gear 321 is driven by the gear 31, and the half-shaft gear 322 is connected to the wheel via the half-shaft 33. The differential 32 allows the half-shaft 33 to rotate at different speeds, ensuring power transmission under various motion conditions and preventing wheel slippage.

[0070] In this embodiment of the invention, the wheel transmission assembly 30 further includes an idler wheel 34, which meshes with the gear 31 and the driven gear 321 of the differential 32. When the engaging gear sleeve locks with the second engaging gear ring, the second output shaft 22 rotates, correspondingly driving the second engaging gear ring and the gear 31 to rotate. The gear 31 further transmits torque to the idler wheel 34, which in turn transmits torque to the half-shaft gear 322 via the driven gear 321. The half-shaft gear 322 outputs torque to the wheel via the half-shaft 33, driving the wheel to rotate and enabling the motor to drive the vehicle. It should be noted that the gear 31, rotatably mounted on the second output shaft 22 of the motor transmission assembly 20, can directly mesh with the driven gear 321 of the differential 32, or additional reduction gears can be provided on the gear 31 and the driven gear 321 as needed.

[0071] like Figure 1 As shown, in some embodiments, the internal combustion engine transmission assembly 10 further includes a torque damper 12, which is disposed between the internal combustion engine 50 and the first engagement gear ring, serving to buffer and dampen vibrations, reducing vibrations during power transmission from the internal combustion engine 50 and ensuring smooth power transmission. The torque damper 12 can be considered as part of the first output shaft of the internal combustion engine transmission assembly. The first engagement gear ring can be formed on the torque damper.

[0072] Furthermore, the transmission mechanism also includes a shift fork mechanism for the synchronizer. The shift fork mechanism includes a shift fork, one end of which is fixedly connected to the engagement tooth sleeve. The shift fork drives the engagement tooth sleeve to engage and lock with the first engagement tooth ring, and the shift fork drives the engagement tooth sleeve to engage and lock with the second engagement tooth ring.

[0073] Furthermore, the transmission mechanism also includes a drive mechanism, which drives the shift fork to move along the first direction.

[0074] This invention also provides a range extender for a vehicle's hybrid power system, including a transmission mechanism and a motor 60 as described above, wherein the motor 60 is drive-connected to the motor transmission assembly 20. The electrical energy generated by the range extender can charge the battery, providing additional electrical energy to increase the driving range of the electric vehicle.

[0075] Furthermore, embodiments of the present invention also provide a hybrid power system for a vehicle, including a range extender and an internal combustion engine 50 as described above, wherein the internal combustion engine 50 is drive-connected to the internal combustion engine transmission assembly 10 of the transmission mechanism of the range extender.

[0076] The first operating mode described above is the power generation mode. Specifically, when operating in the first operating mode, the synchronizer's engagement sleeve engages and locks with the first engagement ring gear. The internal combustion engine transmission assembly 10 is coupled with the electric motor transmission assembly 20, and the internal combustion engine 50 drives the electric motor 60 to rotate. At this time, the electric motor 60 acts as a generator to charge the battery, increasing the battery's stored capacity. At this time, both the internal combustion engine transmission assembly 10 and the electric motor transmission assembly 20 are decoupled from the wheel transmission assembly 30. Furthermore, when the synchronizer's engagement sleeve engages and locks with the first engagement ring gear, the electric motor 60 can be used to start the internal combustion engine.

[0077] The second operating mode described above is a decoupled operating mode. Specifically, when operating in the second operating mode, the synchronizer's engagement sleeve does not engage with the first engagement gear ring, nor with the second engagement gear ring. At this time, the internal combustion engine transmission assembly 10, the electric motor transmission assembly 20, and the wheel transmission assembly 30 are completely decoupled.

[0078] The third operating mode described above is a pure electric drive mode. Specifically, when operating in the third operating mode, the synchronizer's engagement sleeve engages and locks with the second engagement ring gear, and the motor transmission assembly 20 couples with the wheel transmission assembly 30, so that the power of the motor 60 is transmitted to the wheels via the motor transmission assembly 20 and the wheel transmission assembly 30 to drive the vehicle's wheels to rotate. At this time, both the motor transmission assembly 20 and the wheel transmission assembly 30 are decoupled from the internal combustion engine transmission assembly 10. In addition, when the synchronizer's engagement sleeve engages and locks with the second engagement ring gear, the motor 60 can be used to brake the vehicle.

[0079] Furthermore, embodiments of the present invention also provide a driving method for a hybrid power system of a vehicle, for driving the hybrid power system as described above, such as... Figure 2 As shown, the driving method includes the following steps:

[0080] S100: Receive control commands;

[0081] S200: Controls the hybrid power system according to the operating mode indicated by the control command, wherein the operating modes are the first operating mode, the second operating mode, and the third operating mode.

[0082] Specifically, in some embodiments, when the operating mode indicated by the received control command is the first operating mode, the following steps are included:

[0083] Detect the current operating status of the hybrid power system;

[0084] When the hybrid system is detected to be in the second working mode and the motor is not running, the control engagement sleeve engages and locks with the first engagement ring, and controls the internal combustion engine 50 to run.

[0085] When the hybrid system is detected to be in the third operating mode, the control motor 60 enters the active short-circuit mode, and then controls the engagement sleeve to engage and lock with the first engagement ring, thereby controlling the internal combustion engine 50 to run.

[0086] It should be noted that, since the engagement gear ring and engagement sleeve need to rotate at the same speed when the synchronizer 40 is locked, the motor 60 is controlled to enter the active short-circuit mode to reduce the speed of the second output shaft 22, so that the engagement sleeve on the first output shaft 11 at a low speed can smoothly engage and lock with the first engagement gear ring on the second output shaft 22 at a low speed.

[0087] In some embodiments, when the operating mode indicated by the received control command is the second operating mode, the following steps are included:

[0088] Detect the current operating status of the hybrid power system;

[0089] When the hybrid system is detected to be in the first operating mode, the internal combustion engine 50 is shut off and the engagement sleeve is unlocked from the first engagement ring.

[0090] When the hybrid system is detected to be in the third operating mode, the control engagement sleeve is unlocked from the second engagement ring.

[0091] In some embodiments, when the operating mode indicated by the received control command is the third operating mode, the following steps are included:

[0092] Detect the current operating status of the hybrid power system;

[0093] When the hybrid system is detected to be in the first working mode, the internal combustion engine 50 is turned off, the engagement sleeve is unlocked from the first engagement ring, the engagement sleeve is then engaged and locked with the second engagement ring, and the motor 60 is turned on.

[0094] When the hybrid system is detected to be in the second operating mode, the control engagement sleeve engages and locks with the second engagement ring.

[0095] This invention also provides a vehicle including the hybrid power system described above. The vehicle provided by this invention achieves all the technical effects of the aforementioned hybrid power system, which will not be repeated here.

[0096] Furthermore, the range extender or vehicle including the aforementioned transmission mechanism has a controller for controlling the axial movement of the engagement sleeve under different transmission demand modes, thereby achieving transmission connection of different transmission components.

[0097] In summary, the hybrid power system, its driving method, transmission mechanism, range extender, and vehicle provided by this invention have the following advantages:

[0098] When the synchronizer engages and locks with the first engagement gear ring, it connects the internal combustion engine transmission assembly and the electric motor transmission assembly. The internal combustion engine drives the electric motor to generate electricity, which in turn charges the battery, improving the vehicle's range. When the engagement sleeve is not locked with the first and second engagement gear rings, the internal combustion engine transmission assembly, the electric motor transmission assembly, and the wheel transmission assembly are completely decoupled, and the power system has no power output and does not generate electricity. When the engagement sleeve engages and locks with the second engagement gear ring, it connects the electric motor transmission assembly to the wheel transmission, and the electric motor drives the vehicle. By switching the transmission connection status of each transmission assembly through the engagement of the synchronizer with each assembly, different transmission needs can be met, with fast response and high smoothness, improving the user's driving experience.

[0099] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A transmission mechanism for a hybrid power system in a vehicle, characterized in that, include: An internal combustion engine transmission assembly, wherein the internal combustion engine transmission assembly is used for transmission connection with an internal combustion engine; A motor drive assembly, the motor drive assembly being used for connection with a motor drive; A wheel drive assembly for connection to a wheel drive; A synchronizer, the synchronizer including an engagement toothed sleeve disposed on the motor drive assembly, a first engagement toothed ring disposed on the internal combustion engine drive assembly, and a second engagement toothed ring disposed on the wheel drive assembly; In the first operating mode, the synchronizer's engagement sleeve engages and locks with the first engagement ring; In the second operating mode, the synchronizer's engagement sleeve does not engage with the first engagement ring, nor with the second engagement ring; In the third operating mode, the synchronizer's engagement sleeve engages with and locks with the second engagement ring.

2. The transmission mechanism according to claim 1, characterized in that, The internal combustion engine transmission assembly includes a first output shaft, and the first engagement gear ring is fixedly connected to the first output shaft; the electric motor transmission assembly includes a second output shaft, and the second engagement gear ring is rotatably mounted on the second output shaft via a bearing.

3. The transmission mechanism according to claim 2, characterized in that, The motor drive assembly also includes an input shaft, and the input shaft and the second output shaft are connected by a reduction gear set.

4. The transmission mechanism according to claim 3, characterized in that, The reduction gear set includes a planetary gear mechanism.

5. The transmission mechanism according to claim 1, characterized in that, The wheel drive assembly includes a gear rotatably mounted on the second output shaft of the motor drive assembly, the second engaging gear ring being drivenly connected to the gear or integrally formed with the gear; the wheel drive assembly also includes a differential and a half shaft, the differential including a driven gear and a half shaft gear, the driven gear being drivenly connected to the gear, and the half shaft gear being connected to the wheel through the half shaft.

6. The transmission mechanism according to claim 1, characterized in that, The internal combustion engine transmission assembly includes a torque damper disposed between the internal combustion engine and the first engaging gear ring.

7. The transmission mechanism according to claim 2, characterized in that, It also includes a shift fork mechanism for the synchronizer, the shift fork mechanism including a shift fork, one end of the shift fork being fixedly connected to the engagement tooth sleeve, the shift fork driving the engagement tooth sleeve to engage and lock with the first engagement tooth ring, and the shift fork driving the engagement tooth sleeve to engage and lock with the second engagement tooth ring.

8. The transmission mechanism according to claim 7, characterized in that, It also includes a drive mechanism that drives the shift fork to move along a first direction.

9. A range extender for a hybrid power system in a vehicle, characterized in that, The range extender includes: The transmission mechanism according to any one of claims 1 to 8, and An electric motor is connected to the motor transmission assembly of the transmission mechanism.

10. A hybrid power system for a vehicle, characterized in that, include: The range extender as described in claim 9, and An internal combustion engine is connected to the internal combustion engine transmission assembly of the transmission mechanism of the range extender.

11. A driving method for a hybrid power system in a vehicle, characterized in that, For driving the hybrid power system as described in claim 10, the following steps are included: Receive control commands; The hybrid power system is controlled according to the operating mode indicated by the control command, wherein the operating mode is a first operating mode, a second operating mode, and a third operating mode.

12. The driving method according to claim 11, characterized in that, When the operating mode indicated by the received control command is the first operating mode, the following steps are included: Detect the current operating status of the hybrid power system; When the hybrid system is detected to be in the second operating mode and the motor is not running, the engagement sleeve is controlled to engage and lock with the first engagement ring, and the internal combustion engine is controlled to run. When the hybrid power system is detected to be in the third operating mode, the motor is controlled to enter the active short-circuit mode, and then the engagement sleeve is controlled to engage and lock with the first engagement ring, thereby controlling the operation of the internal combustion engine.

13. The driving method according to claim 11, characterized in that, When the operating mode indicated by the received control command is the second operating mode, the following steps are included: Detect the current operating status of the hybrid power system; When the hybrid system is detected to be in the first operating mode, the internal combustion engine is shut off, and the engagement sleeve is unlocked from the first engagement ring. When the hybrid system is detected to be in the third operating mode, the engagement sleeve is controlled to unlock from the second engagement ring.

14. The driving method according to claim 11, characterized in that, When the operating mode indicated by the received control command is the third operating mode, the following steps are included: Detect the current operating status of the hybrid power system; When the hybrid system is detected to be in the first working mode, the internal combustion engine is turned off, the engagement sleeve is unlocked from the first engagement ring, and then the engagement sleeve is controlled to engage and lock with the second engagement ring. When the hybrid power system is detected to be in the second operating mode, the engagement sleeve is controlled to engage and lock with the second engagement ring.

15. A vehicle, characterized in that, Including the hybrid power system as described in claim 10.

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