Variable speed transmission system for vehicle and vehicle

Abstract

A variable speed transmission system for a vehicle and a vehicle, the variable speed transmission system for a vehicle comprising a power assembly (10), a transmission control assembly (20), an intermediate shaft assembly (30), and an output assembly (40), wherein the power assembly (10) is connected to the intermediate shaft assembly (30); the transmission control assembly (20) comprises a first sun gear (21) and a first control member (22), wherein the first sun gear (21) is sleeved on the intermediate shaft assembly (30) and can rotate relative to the intermediate shaft assembly (30); the first control member (22) has one end connected to the intermediate shaft assembly (30) and the other end connected to the first sun gear (21), and the one end and the other end of the first control member (22) are controllably engaged or disengaged; and the output assembly (40) is connected to a power output end of the transmission control assembly (20). The variable speed transmission system for a vehicle and the vehicle have more compact structures and high integration levels, and can realize switching and operating of the vehicle between a plurality of operation modes and a plurality of gear positions.

Description

Automobile transmission system and automobile

[0001] This application claims priority to Chinese patent application No. 202311541588.7 filed on November 15, 2023, entitled “Automobile Speed ​​Transmission System and Automobile”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of automobile technology, and in particular to an automobile speed transmission system and an automobile. Background Art

[0003] With the continuous increase in car ownership, vehicle exhaust pollution has become a major source of urban air pollution. Countries have enacted corresponding emission regulations and incentive policies, and formulated long-term plans to promote the development of clean and renewable energy, directly driving the growth of the new energy vehicle market. However, pure electric vehicles, hindered by subjective and objective factors such as inconvenient charging and short driving range, have a poor user experience. Hybrid vehicles, also part of the new energy vehicle sector, have gradually gained market favor with their superior energy conservation and emission reduction capabilities, as well as a superior user experience.

[0004] Efficient hybrid vehicle powertrains can significantly improve overall vehicle performance and fuel economy, while reducing exhaust emissions. Major automotive companies are actively developing integrated hybrid transmissions. Currently, most powertrain systems on the market are based on traditional automatic transmissions, integrating the electric motor into the front or rear end of transmissions such as AT (automatic transmission), AMT (automatic manual transmission), CVT (continuously variable transmission), or DCT (dual clutch transmission) to create the powertrain.

[0005] Although this type of power drive system has low technical difficulty and requires less R&D investment, it also has problems such as low integration, large size, and is not conducive to vehicle layout.

[0006] Summary of the Invention

[0007] In view of this, the present application provides an automobile speed transmission system and an automobile.

[0008] Specifically, this application includes the following technical solutions:

[0009] A first aspect of the present application provides an automobile speed transmission system, the automobile speed transmission system comprising: a power assembly, a transmission control assembly, an intermediate shaft assembly, and an output assembly;

[0010] The power assembly is connected to the intermediate shaft assembly;

[0011] The transmission control assembly includes a first sun gear and a first control member. The first sun gear is sleeved on the intermediate shaft assembly and can rotate relative to the intermediate shaft assembly. One end of the first control member is connected to the intermediate shaft assembly, and the other end is connected to the first sun gear. One end and the other end of the first control member can be controllably coupled or separated.

[0012] The output component is connected to the power output end of the transmission control component.

[0013] Optionally, the transmission control assembly further includes a first planetary gear, a second sun gear, a second planetary gear, a first planetary carrier and a first ring gear;

[0014] The first planetary gear is meshed with the first sun gear, the second sun gear is connected to the intermediate shaft assembly, and the second planetary gear is meshed with the second sun gear;

[0015] The first planet carrier is drivingly connected to the first planet gear and the second planet gear;

[0016] The first ring gear is drivingly connected to the first planetary gear and the second planetary gear, and the first ring gear is also connected to the output assembly.

[0017] Optionally, the first ring gear is disposed outside the first planetary gear, and the inner teeth of the first ring gear are engaged with the first planetary gear, and the first ring gear is also fixedly connected to the second planetary gear;

[0018] The first planet carrier is arranged on the outer side of the second planet gear, and the inner teeth of the first planet carrier are engaged with the second planet gear. The first planet carrier is also fixedly connected to the first planet gear.

[0019] Optionally, the transmission control assembly further includes a second control member connected to the first planet carrier and configured to lock the first planet carrier.

[0020] Optionally, the transmission control assembly further includes a third control member, wherein the third control member is connected to the first sun gear and is used to lock the first sun gear.

[0021] Optionally, the power assembly includes at least one of a first power source and a second power source, and the first power source and the second power source are respectively connected to two ends of the intermediate shaft assembly.

[0022] Optionally, the intermediate shaft assembly includes a first shaft segment and a second shaft segment;

[0023] The automobile speed change transmission system further includes a third sun gear, a third planetary gear, a second planet carrier and a second ring gear;

[0024] The third sun gear is sleeved on the first shaft segment and can rotate relative to the first shaft segment;

[0025] The third planet gear is meshed with the third sun gear;

[0026] One end of the second planet carrier is connected to the third planet gear, and the other end is connected to the first shaft segment;

[0027] The second ring gear is arranged on the outer side of the third planetary gear, and the inner teeth of the second ring gear are engaged with the third planetary gear. The second ring gear is also connected to the second shaft segment.

[0028] Optionally, the first power source and the second power source are connected to the first shaft segment and the second shaft segment respectively;

[0029] The power assembly further includes a third power source connected to the third sun gear.

[0030] Optionally, the automobile speed transmission system further includes a fourth control component, which is connected to the first shaft segment and is used to lock the first shaft segment.

[0031] A second aspect of an embodiment of the present application provides an automobile, comprising the above-mentioned automobile speed transmission system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] FIG1 shows a schematic structural diagram of a vehicle speed transmission system provided by an embodiment of the present application;

[0034] FIG2 shows a first power transmission schematic diagram of a vehicle speed transmission system provided by an embodiment of the present application;

[0035] FIG3 shows a second power transmission schematic diagram of the automobile speed transmission system provided by an embodiment of the present application;

[0036] FIG4 shows a third power transmission schematic diagram of the automobile speed transmission system provided by an embodiment of the present application;

[0037] FIG5 shows a fourth power transmission schematic diagram of the automobile speed transmission system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application. To make the technical solutions and advantages of this application more clear, the following will be combined with the accompanying drawings to describe in detail the automobile transmission system and automobile.

[0039] The present application provides an automobile speed transmission system, as shown in Figure 1, the automobile speed transmission system includes: a power assembly 10, a transmission control assembly 20, an intermediate shaft assembly 30 and an output assembly 40; the power assembly 10 is connected to the intermediate shaft assembly 30; the transmission control assembly 20 includes a first sun gear 21 and a first control member 22, the first sun gear 21 is mounted on the intermediate shaft assembly 30 and can rotate relative to the intermediate shaft assembly 30; one end of the first control member 22 is connected to the intermediate shaft assembly 30, and the other end is connected to the first sun gear 21, and one end and the other end of the first control member 22 can be controllably combined or separated; the output assembly 40 is connected to the power output end of the transmission control assembly 20.

[0040] As shown in Figure 1, in the automotive transmission system provided by the embodiment of the present application, a first sun gear 21 is mounted on an intermediate shaft assembly 30, and a first control member 22 is connected to the intermediate shaft assembly 30 and the first sun gear 21, respectively. After the power assembly 10 transmits power to the intermediate shaft assembly 30, the intermediate shaft assembly 30 can selectively transfer power to the first sun gear 21 under the action of the first control member 22, thereby driving the vehicle. Compared with existing transmission systems, this system has a more compact structure, saves layout space, and enables the vehicle to switch and operate between multiple operating modes and multiple gears.

[0041] Optionally, the first control component 22 may be a clutch or a synchronizer, and those skilled in the art may select and adjust the type of the first control component 22 according to needs.

[0042] In a possible embodiment, the output assembly 40 may further include a first gear 41, a second gear 42, and a differential 43. As shown in FIG2 , one end of the first gear 41 meshes with the first ring gear 27, the other end of the first gear 41 meshes with the second gear 42, the second gear 42 is connected to the differential 43, and the differential 43 is connected to wheels 44, which are mounted on opposite ends of a drive shaft of each wheel 44. Power is transmitted sequentially through the first gear 41, the second gear 42, and the differential 43 to the wheels. The differential 43 enables the two wheels 44 to rotate at different speeds, thereby achieving precise steering.

[0043] In some embodiments of the present application, the transmission control assembly 20 may also include a first planetary gear 23, a second sun gear 24, a second planetary gear 25, a first planetary carrier 26 and a first ring gear 27; the first planetary gear 23 is engaged with the first sun gear 21, the second sun gear 24 is connected to the intermediate shaft assembly 30, and the second planetary gear 25 is engaged with the second sun gear 24; the first planetary carrier 26 is transmission-connected to the first planetary gear 23 and the second planetary gear 25; the first ring gear 27 is transmission-connected to the first planetary gear 23 and the second planetary gear 25, and the first ring gear 27 is also connected to the output assembly 40.

[0044] Exemplarily, as shown in Figures 1 and 2, the automobile transmission system may include two planetary gear trains, each of which may include a sun gear and a planet gear, the two sun gears are respectively connected to the intermediate shaft assembly 30, and the first planet gear 23 and the second planet gear 25 are transmission connected through the first planet carrier 26 and the first ring gear 27.

[0045] In some embodiments of the present application, the first ring gear 27 is arranged on the outside of the first planetary gear 23, and the inner teeth of the first ring gear 27 are engaged with the first planetary gear 23, and the first ring gear 27 is also fixedly connected to the second planetary gear 25; the first planetary carrier 26 is arranged on the outside of the second planetary gear 25, and the inner teeth of the first planetary carrier 26 are engaged with the second planetary gear 25, and the first planetary carrier 26 is also fixedly connected to the first planetary gear 23.

[0046] Optionally, the transmission control assembly 20 may further include a second control member 221 , which is connected to the first planet carrier 26 and is used to lock the first planet carrier 26 .

[0047] Optionally, the second control component 221 may be a clutch or a brake, and those skilled in the art can select and adjust the type of the second control component 221 according to needs.

[0048] Optionally, the transmission control assembly 20 may further include a third control member 222 connected to the first sun gear 21 for locking the first sun gear 21 . Those skilled in the art can select and adjust the type of the third control member 222 as needed.

[0049] Optionally, the third control component 222 may be a clutch or a controller.

[0050] Based on the aforementioned connection method between the planet carrier and the first planetary gears 23 and the second planetary gears 25, and the connection method between the first ring gear 27 and the first planetary gears 23 and the second planetary gears 25, the first planet carrier 26 actually also functions as a ring gear meshing with the second planetary gears 25, and the first ring gear 27 also functions as a planet carrier connected to the second planetary gears 25. In other words, the first planet carrier 26 and the first ring gear 27 each function as a planet carrier in one planetary gear train and simultaneously function as a ring gear in the other planetary gear train.

[0051] Specifically, when the first control member 22 is engaged, the second control member 221 is separated and the third control member 222 is separated, power is transmitted to the first sun gear 21 through the intermediate shaft assembly 30, and the first sun gear 21 transmits power to the output assembly 40 through the first planetary gear 23 and the first ring gear 27; at this time, since the first planetary carrier 26 is connected to the first planetary gear 23 and the second planetary gear 25, while the first sun gear 21 rotates, the first planetary gear 23 rotates on its own, and the first planetary carrier 26 does not rotate.

[0052] In some embodiments, when the first control member 22 is separated, the second control member 221 is separated and the third control member 222 is engaged, power is transmitted to the second sun gear 24 through the intermediate shaft assembly 30, and the second sun gear 24 drives the second planetary gear 25 to rotate, and then transmits power to the first planetary carrier 26 and the first ring gear 27 through two paths respectively. Since the first sun gear 21 is locked by the third control member 222, the power on the first planetary carrier 26 is also collected to the first ring gear 27 through the first planetary gear 23, and finally transmitted together to the output assembly 40.

[0053] In some embodiments, when the first control member 22 is disengaged, the second control member 221 is engaged, and the third control member 222 is disengaged, power is transmitted to the second sun gear 24 through the intermediate shaft assembly 30, and the second sun gear 24 drives the second planetary gear 25 to rotate, thereby transmitting power to the first ring gear 27, and finally to the output assembly 40. Compared with the case where the first planetary carrier 26 is not locked, power can only be transmitted to the output assembly 40 through the second sun gear 24, the second planetary gear 25, and the first ring gear 27.

[0054] In some embodiments of the present application, the power assembly 10 includes at least one of a first power source 11 and a second power source 12 , and the first power source 11 and the second power source 12 are respectively connected to both ends of the intermediate shaft assembly 30 .

[0055] For example, as shown in Figures 1 and 2 , in a hybrid vehicle, the power assembly 10 may include a first power source 11 and a second power source 12. The first power source 11 and the second power source 12 are respectively connected to an intermediate shaft assembly 30 and disposed at both ends of the intermediate assembly. The first power source 11 may be an engine, and the second power source 12 may be an electric motor. When the vehicle is in pure electric mode, power is transmitted only by the second power source 12 to the intermediate shaft assembly 30. The intermediate shaft assembly 30 transmits power to the output assembly 40 via the transmission control assembly 20, thereby driving the vehicle. When the vehicle is in hybrid mode, the first control element 22 is engaged, and the power output from the first power source 11 and the second power source 12 is transmitted to the intermediate shaft assembly 30, and then to the output assembly 40 via the transmission control assembly 20, thereby driving the vehicle. The second control element 221 and the third control element 222 can be controlled to achieve multiple gear shifts within the hybrid mode.

[0056] It's important to note that hybrid vehicles utilize the electric motor's fast response and high low-speed torque during acceleration and low-speed phases, typically using a pure electric drive mode to improve vehicle response and acceleration. This also avoids frequent engine starts and stops in urban driving conditions, reducing energy loss and improving fuel efficiency. At medium and high speeds, the engine intervenes in a hybrid drive mode, leveraging the motor's power to adjust the engine's torque operating point, ensuring it always operates in its most efficient zone. This further improves fuel efficiency, reduces shifting, and enhances vehicle ride smoothness, meeting user comfort requirements.

[0057] In some embodiments of the present application, the intermediate shaft assembly 30 includes a first shaft section 31 and a second shaft section 32; the automobile speed transmission system also includes a third sun gear 50, a third planetary gear 51, a second planetary carrier 52, and a second ring gear 53; the third sun gear 50 is sleeved on the first shaft section 31 and can rotate relative to the first shaft section 31; the third planetary gear 51 is engaged with the third sun gear 50; one end of the second planetary carrier 52 is connected to the third planetary gear 51, and the other end is connected to the first shaft section 31; the second ring gear 53 is arranged on the outside of the third planetary gear 51, and the inner teeth of the second ring gear 53 are engaged with the third planetary gear 51, and the second ring gear 53 is also connected to the second shaft section 32.

[0058] In some embodiments, a planetary gear system is further arranged between the first shaft segment 31 and the second shaft segment 32. The first power source 11 is connected to the second planetary carrier 52 of the planetary gear system through the first shaft segment 31. The outer ring of the third planetary gear 51 is provided with a second ring gear 53. The second ring gear 53 is connected to the second shaft segment 32. The power transmitted by the first power source 11 passes through the second planetary carrier 52, the second planetary gear 25 and the second ring gear 53 in sequence, and is then transmitted to the second shaft segment 32.

[0059] In some embodiments of the present application, the first power source 11 and the second power source 12 are connected to the first shaft segment 31 and the second shaft segment 32 respectively; the power assembly 10 also includes a third power source 13, which is connected to the third sun gear 50.

[0060] It should be noted that the second power source 12 and the third power source 13 can both be motors and connected to the power battery 15 via the inverter 14. The second power source 12 and the third power source 13 can exchange energy with the power battery 15. When the second power source 12 and / or the third power source 13 are operating, the power battery 15 can provide energy to the operating power source; when the second power source 12 and / or the third power source 13 are in power generation mode, the power battery 15 can receive and store energy converted by the generating motors.

[0061] "Operating" refers to the motor converting electrical energy into mechanical energy, "off-operating" refers to the motor neither converting electrical energy into mechanical energy nor converting mechanical energy into electrical energy, and "in power generation mode" refers to the motor converting mechanical energy into electrical energy. Both the second power source 12 and the third power source 13 can rotate forward or reverse. Forward rotation enables the vehicle to move forward, while reverse rotation activates the vehicle's reverse function.

[0062] For example, as shown in Figures 1 and 2, the vehicle transmission system may also be provided with a third power source 13, which is also electrically connected to the second power source 12. The power transmitted by the first power source 11 can be divided into two paths: one path is transmitted to the second shaft segment 32 via the third planetary gears 51 and the second ring gear 53, and the other path is transmitted to the third power source 13 via the third sun gear 50. When the ignition switch is pressed to start the engine, the third power source 13 directly drives the third sun gear 50, which in turn rotates the third planetary gears and the second planet carrier 52, thereby starting the engine. After the engine starts, the third power source 13 no longer outputs power to the third sun gear 50. Instead, the engine drives the first shaft segment 31, which in turn rotates the third planet carrier, thereby driving the third sun gear 50. The third power source 13 then becomes a generator to charge the battery.

[0063] In some embodiments of the present application, the automobile transmission system further includes a fourth control member 224 , which is connected to the first shaft segment 31 and is used to lock the first shaft segment 31 .

[0064] Since the third power source 13 is connected to the third sun gear 50, the third sun gear 50 is connected to the third planetary gear 51, the third planetary gear 51 is connected to the third planetary carrier, and the third planetary carrier is connected to the first shaft segment 31, the first power source 11 will definitely drive the third power source 13 when outputting power, and vice versa; therefore, when the car runs in pure electric mode and hopes to drive the car by the third power source 13, the first shaft segment 31 can be locked by the fourth control component 224, and the power transmitted by the third power source 13 is only transmitted to the second shaft segment 32, and will not drive the first shaft segment 31 to rotate; in conjunction with the fourth control component 224, the car can be switched between different operating modes.

[0065] Optionally, the fourth control component 224 may be a clutch or a brake, and one skilled in the art may select and adjust the type of the fourth control component 224 according to needs.

[0066] A second aspect of the embodiments of the present application provides an automobile, comprising the automobile speed transmission system described in any of the above embodiments. The vehicle also has a controller capable of determining a matching operating mode based on the current vehicle state and controlling the automobile speed transmission system to switch to the corresponding operating mode. The current vehicle state includes at least the current accelerator pedal opening, the current brake pedal opening, the current power level of the power battery 15, the current vehicle speed, and the current operating conditions. The operating modes that can be achieved by the automobile speed transmission system include at least a pure electric drive mode, an E-CVT mode, and an energy recovery mode.

[0067] 1. Pure electric drive mode:

[0068] When the automobile provided in the embodiment of the present application is in pure electric drive mode, the second power source 12 or the third power source 13 can be used as a separate power source. This working mode is generally suitable for situations where the vehicle is in a low-speed creeping or cruising state, such as in urban conditions. It can reduce power consumption during congestion and parking waiting, save more electricity, and meet the user's pursuit of economy, power and comfort and other requirements.

[0069] At this time, the controller may be configured to control the second power source 12 to operate, and control the first power source 11 and the third power source 13 to not operate.

[0070] 1. Pure electric mode first gear

[0071] At this time, the controller may be configured to: control the first control element 22 to separate, the second control element 221 to combine, the third control element 222 to separate, and the fourth control element 224 to separate.

[0072] As shown in Figure 3, the power battery 15 provides electrical energy to the second power source 12, driving the main shaft of the second power source 12 to rotate, transmitting power to the second shaft segment 32, and then transmitting power to the output assembly 40 through the second planetary gear 25 and the first ring gear 27, thereby driving the wheels 44. The power transmission path of this gear is:

[0073] Second power source 12 -> second shaft segment 32 -> second planetary gear 25 -> first ring gear 27 -> output assembly 40 .

[0074] 2. Second gear in pure electric mode

[0075] At this time, the controller may be configured to: control the first control element 22 to be coupled, the second control element 221 to be separated, the third control element 222 to be separated, and the fourth control element 224 to be separated.

[0076] As shown in Figure 4, the power battery 15 provides electrical energy to the second power source 12, driving the main shaft of the second power source 12 to rotate, transmitting power to the second shaft segment 32, and then transmitting power to the output assembly 40 through the first sun gear 21, the first planetary gears 23 and the first ring gear 27, thereby driving the wheels 44. The power transmission path of this gear is:

[0077] second power source 12 -> second shaft segment 32 -> first sun gear 21 -> first planetary gears 23 -> first ring gear 27 -> output assembly 40 .

[0078] 3. Pure electric mode three gears

[0079] At this time, the controller may be configured to: control the first control element 22 to be engaged, the second control element 221 to be separated, the third control element 222 to be engaged, and the fourth control element 224 to be separated.

[0080] As shown in Figure 5, the power battery 15 provides electrical energy to the second power source 12, driving the main shaft of the second power source 12 to rotate, transmitting power to the second shaft segment 32, and then transmitting power to the output assembly 40 through two paths, thereby driving the wheels 44. The power transmission path of this gear is:

[0081] (1) Second power source 12 -> second shaft segment 32 -> second sun gear 24 -> second planetary gear 25 -> first planetary carrier 26 -> first planetary gear 23 -> first ring gear 27 -> output assembly 40 .

[0082] (2) Second power source 12 -> second shaft segment 32 -> second sun gear 24 -> second planetary gear 25 -> first ring gear 27 -> output assembly 40 .

[0083] 4. Driving mode of the first power source 11

[0084] At this time, the controller may be configured to: control the third power source 13 to work, the first power source 11 and the second power source 12 to not work, and the fourth control component 224 to be engaged.

[0085] In this mode, power from the third power source 13 is transmitted to the second shaft segment 32 via the third sun gear 50, third planetary gears 51, and second ring gear 53. Furthermore, power is transmitted to the output assembly 40 via the first sun gear 21 or the second sun gear 24 to drive the vehicle. Multiple gear shifts can be achieved using the first control element 22, the second control element 221, and the third control element 222. The power transmission path is substantially the same as for the three gears described above and will not be further elaborated upon here.

[0086] 5. Dual motor drive mode

[0087] At this time, the controller may be configured to: control the third power source 13 and the second power source 12 to work, the first power source 11 to stop working, and the fourth control component 224 to be engaged.

[0088] In this mode, power from the third power source 13 is transmitted to the second shaft segment 32 via the third sun gear 50, third planetary gears 51, and second ring gear 53. Power from the second power source 12 is also transmitted to the second shaft segment 32. The two power streams then merge and are transmitted to the output assembly 40 to propel the vehicle. Multiple gear shifts can be achieved using the first control element 22, second control element 221, and third control element 222. The power transmission path is generally similar to the three gears described above and will not be further elaborated upon here.

[0089] 2. E-CVT Mode

[0090] When the car is in E-CVT mode, also known as continuously variable transmission mode, the first power source 11 and the second power source 12 can be used as hybrid power sources, and the third power source 13 can be used as a power generation device. This working mode is usually suitable for large torque conditions, rapid acceleration conditions, etc. For example, when the vehicle is at high speed and temporarily needs a large torque to overtake, it can not only utilize the power advantage of the first power source 11 at high speed, but also utilize the fast responsiveness of the motor, so that the vehicle can obtain a large torque in a short time when traveling at high speed; of course, this working mode can also be applied to the situation where the power battery 15 is insufficient, and the third power source 13 generates electricity to supply energy to the second power source 12 to drive the vehicle.

[0091] At this time, the controller may be configured to control the first power source 11 , the second power source 12 and the third power source 13 to all operate.

[0092] 1. E-CVT first gear

[0093] At this time, the controller may be configured to: control the first control element 22 to separate, the second control element 221 to combine, the third control element 222 to separate, and the fourth control element 224 to separate.

[0094] In this gear mode, the first power source 11 drives the third power source 13 to generate electricity. The electricity generated by the third power source 13 and the power of the power battery 15 simultaneously drive the main shaft of the second power source 12 to rotate. At this time, the power of the first power source 11 is also transmitted to the second shaft segment 32 through the second planetary carrier 52 and the third planetary gear 51. The power of the three power sources simultaneously drives the wheels 44. The power transmission path of this gear is:

[0095] (1) First power source 11 -> first shaft segment 31 -> second planetary carrier 52 -> third planetary gear 51 -> third sun gear 50 -> third power source 13 .

[0096] (2) First power source 11 -> first shaft segment 31 -> second planetary carrier 52 -> third planetary gear 51 -> second ring gear 53 -> second shaft segment 32 -> second sun gear 24 -> second planetary gear 25 -> first ring gear 27 -> output assembly 40 .

[0097] (3) Second power source 12 -> second shaft segment 32 -> second sun gear 24 -> second planetary gear 25 -> first ring gear 27 -> output assembly 40 .

[0098] 2. E-CVT second gear

[0099] At this time, the controller may be configured to: control the first control element 22 to be coupled, the second control element 221 to be separated, the third control element 222 to be separated, and the fourth control element 224 to be separated.

[0100] In this gear mode, the first power source 11 drives the third power source 13 to generate electricity. The electricity generated by the third power source 13 and the power of the power battery 15 simultaneously drive the main shaft of the second power source 12 to rotate. At this time, the power of the first power source 11 is also transmitted to the second shaft segment 32 through the second planetary carrier 52 and the third planetary gear 51. The power of the three power sources simultaneously drives the wheels 44. The power transmission path of this gear is:

[0101] (1) First power source 11 -> first shaft segment 31 -> second planetary carrier 52 -> third planetary gear 51 -> third sun gear 50 -> third power source 13 .

[0102] (2) First power source 11 -> first shaft segment 31 -> second planetary carrier 52 -> third planetary gear 51 -> second ring gear 53 -> second shaft segment 32 -> first sun gear 21 -> first planetary gear 23 -> first ring gear 27 -> output assembly 40 .

[0103] (3) Second power source 12 -> second shaft segment 32 -> first sun gear 21 -> first planetary gear 23 -> first ring gear 27 -> output assembly 40 .

[0104] 3. E-CVT three-speed

[0105] At this time, the controller may be configured to: control the first control element 22 to separate, the second control element 221 to separate, the third control element 222 to combine, and the fourth control element 224 to separate.

[0106] In this gear mode, the first power source 11 drives the third power source 13 to generate electricity. The electricity generated by the third power source 13 and the power of the power battery 15 simultaneously drive the main shaft of the second power source 12 to rotate. At this time, the power of the first power source 11 is also transmitted to the second shaft segment 32 through the second planetary carrier 52 and the third planetary gear 51. The power of the three power sources simultaneously drives the wheels 44. The power transmission path of this gear is:

[0107] (1) First power source 11 -> first shaft segment 31 -> second planetary carrier 52 -> third planetary gear 51 -> third sun gear 50 -> third power source 13 .

[0108] (2) First power source 11 -> first shaft segment 31 -> second planetary carrier 52 -> third planetary gear 51 -> second ring gear 53 -> second shaft segment 32 -> second sun gear 24 -> second planetary gear 25 -> first ring gear 27 -> output assembly 40 .

[0109] (3) First power source 11 -> first shaft segment 31 -> second planetary carrier 52 -> third planetary gear 51 -> second ring gear 53 -> second shaft segment 32 -> second sun gear 24 -> second planetary gear 25 -> first planetary carrier 26 -> first planetary gear 23 -> first ring gear 27 -> output assembly 40 .

[0110] (4) Second power source 12 -> second shaft segment 32 -> second sun gear 24 -> second planetary gear 25 -> first planetary carrier 26 -> first planetary gear 23 -> first ring gear 27 -> output assembly 40 .

[0111] (5) Second power source 12 -> second shaft segment 32 -> second sun gear 24 -> second planetary gear 25 -> first ring gear 27 -> output assembly 40 .

[0112] 3. Energy Recovery Mode

[0113] In this driving mode, the controller can be configured to: control all three power sources to not work, control the first control element 22 to separate, the second control element 221 to engage, the third control element 222 to separate, and the fourth control element 224 to separate.

[0114] When in coasting / braking energy recovery mode, the vehicle transmission system provided in the embodiments of the present application can utilize at least one of the second power source 12 and the third power source 13 as a power generation device to convert the vehicle's kinetic energy into electrical energy and store it in the power battery 15 for future use. This operating mode is generally applicable to coasting and braking conditions, allowing the vehicle to recover some of its kinetic energy and convert it into stored electrical energy to provide energy for subsequent vehicle operation, thereby increasing the vehicle's range.

[0115] When the vehicle is coasting or braking, the wheels 44 provide a reverse torque to the second power source 12, converting part of the vehicle's kinetic energy into electrical energy via the second power source 12 and storing it in the power battery 15 for standby use. In this mode, the power transmission path is as follows:

[0116] Wheel 44 -> differential 43 -> second gear 42 -> first gear 41 -> first ring gear 27 -> second planetary gear 25 -> second sun gear 24 -> second shaft segment 32 -> second power source 12 .

[0117] In summary, in the vehicle provided by the embodiment of the present application, the first sun gear 21 is mounted on the intermediate shaft assembly 30, and the first control member 22 is connected to the intermediate shaft assembly 30 and the first sun gear 21, respectively. After the power assembly 10 transmits power to the intermediate shaft assembly 30, the intermediate shaft assembly 30 can selectively transmit power to the first sun gear 21 under the action of the first control member 22, thereby driving the vehicle. Compared to the existing structure of connecting a clutch to the planetary gears in a planetary gear train, this structure is more compact, saves layout space, and enables the vehicle to switch and operate between multiple operating modes and multiple gears.

[0118] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0119] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only.

[0120] It will be understood that the present application is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof.

Claims

1. An automobile transmission system, comprising: A power assembly (10), a transmission control assembly (20), an intermediate shaft assembly (30) and an output assembly (40); The power assembly (10) is connected to the intermediate shaft assembly (30); The transmission control assembly (20) comprises a first sun gear (21) and a first control member (22); the first sun gear (21) is sleeved on the intermediate shaft assembly (30) and can rotate relative to the intermediate shaft assembly (30); one end of the first control member (22) is connected to the intermediate shaft assembly (30), and the other end is connected to the first sun gear (21); one end and the other end of the first control member (22) can be controllably combined or separated; The output component (40) is connected to the power output end of the transmission control component (20).

2. The automotive transmission system according to claim 1, wherein the transmission control assembly (20) further comprises a first planetary gear (23), a second sun gear (24), a second planetary gear (25), a first planet carrier (26) and a first ring gear (27); The first planetary gear (23) is meshed with the first sun gear (21), the second sun gear (24) is connected to the intermediate shaft assembly (30), and the second planetary gear (25) is meshed with the second sun gear (24); The first planet carrier (26) is drivingly connected to the first planet gear (23) and the second planet gear (25); The first ring gear (27) is drivingly connected to the first planetary gear (23) and the second planetary gear (25), and the first ring gear (27) is also connected to the output assembly (40).

3. The automotive transmission system according to claim 2, wherein the first gear ring (27) is disposed on the outer side of the first planetary gear (23), and the inner teeth of the first gear ring (27) are meshed with the first planetary gear (23), and the first gear ring (27) is also fixedly connected to the second planetary gear (25); The first planet carrier (26) is arranged on the outer side of the second planetary gear (25), and the inner teeth of the first planet carrier (26) are meshed with the second planetary gear (25). The first planet carrier (26) is also fixedly connected to the first planetary gear (23).

4. The automotive transmission system according to claim 2 or 3, wherein: The transmission control assembly (20) further comprises a second control member (221), wherein the second control member (221) is connected to the first planet carrier (26) and is used to lock the first planet carrier (26).

5. The automobile transmission system according to claim 2 or 3, wherein the transmission control assembly (20) further comprises a third control member (222), wherein the third control member (222) is connected to the first sun gear (21) and is used to lock the first sun gear (21).

6. The automotive transmission system according to claim 1, wherein the power assembly (10) comprises at least one of a first power source (11) and a second power source (12), and the first power source (11) and the second power source (12) are respectively connected to both ends of the intermediate shaft assembly (30).

7. The automotive transmission system according to claim 6, wherein the intermediate shaft assembly (30) comprises a first shaft section (31) and a second shaft section (32); The automobile speed transmission system further comprises a third sun gear (50), a third planetary gear (51), a second planetary carrier (52) and a second ring gear (53); The third sun gear (50) is sleeved on the first shaft section (31) and can rotate relative to the first shaft section (31); The third planetary gear (51) is meshed with the third sun gear (50); One end of the second planet carrier (52) is connected to the third planet gear (51), and the other end is connected to the first shaft segment (31); The second gear ring (53) is arranged on the outer side of the third planetary gear (51), and the inner teeth of the second gear ring (53) are meshed with the third planetary gear (51). The second gear ring (53) is also connected to the second shaft section (32).

8. The automotive transmission system according to claim 7, wherein the first power source (11) and the second power source (12) are connected to the first shaft section (31) and the second shaft section (32) respectively; The power assembly (10) further comprises a third power source (13), wherein the third power source (13) is connected to the third sun gear (50).

9. The automobile speed change transmission system according to claim 6, wherein the automobile speed change transmission system further comprises a fourth control member (224), wherein the fourth control member (224) is connected to the first shaft section (31) and is used to lock the first shaft section (31).

10. An automobile, characterized in that: The invention comprises the automobile speed transmission system as claimed in any one of claims 1 to 9.

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