Vehicle transmission system and vehicle

Abstract

The present disclosure relates to a kind of vehicle transmission system and vehicle, belong to vehicle technical field.The vehicle transmission system includes engine, first motor, second motor, first transmission component, second transmission component, drive component and controller;Drive component includes first clutch, second clutch and third clutch, and controller is electrically connected with engine, first motor, second motor, first clutch, second clutch and third clutch respectively.By using the present disclosure, controller can be adjusted to different drive mode by controlling the combination or separation of first clutch, second clutch and third clutch, and by controlling the operation or stop of engine, first motor and second motor, different driving modes can be used to adapt to different working conditions in vehicle driving process.

Description

Technical Field

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

[0002] With the continuous development of vehicle engineering technology, hybrid power driving mode has gradually become the mainstream driving mode of vehicles.

[0003] At present, the hybrid power driving mode is mainly realized by the vehicle transmission system, which is mostly developed based on the traditional automatic transmission, that is, the motor is simply integrated at the front or rear end of the transmission such as AT, AMT, CVT or DCT.

[0004] The above-mentioned vehicle speed transmission system can meet simple transmission requirements, but due to its simple structure, the working mode of the vehicle speed transmission system is relatively simple. Summary of the Invention

[0005] The embodiments of the present disclosure provide a vehicle transmission system and a vehicle, which can solve the technical problems existing in the related art. The technical solutions are as follows:

[0006] In a first aspect, the present disclosure provides a vehicle transmission system, the vehicle transmission system comprising an engine, a first motor, a second motor, a first transmission assembly, a second transmission assembly, a drive assembly, and a controller;

[0007] The first transmission assembly includes a first shaft, a first gear, a second shaft, a second gear, and a third gear. The first shaft is in transmission connection with the engine. The first gear is fixed to the outside of the first shaft. The second shaft is in transmission connection with the first shaft and the first motor respectively. The second gear and the third gear are in transmission connection with the second shaft respectively.

[0008] The second transmission assembly includes a fourth gear, a fifth gear, a sixth gear, a planetary gear set, a seventh gear and a third shaft. The second motor is connected to the sun gear in the planetary gear set, the fourth gear is meshed with the first gear and is connected to the planet carrier in the planetary gear set. The fifth gear, the sixth gear and the seventh gear are fixed outside the third shaft at intervals. The fifth gear is meshed with the second gear, and the sixth gear is meshed with the third gear. The first transmission ratio is set between the fifth gear and the second gear, and the second transmission ratio is set between the sixth gear and the third gear. The first transmission ratio is not equal to the second transmission ratio. The seventh gear is used for connecting to the wheel of the vehicle. The third shaft is connected to the ring gear in the planetary gear set.

[0009] The drive assembly includes a first clutch, a second clutch, and a third clutch, wherein the first clutch is used to connect or disconnect the second shaft and the first shaft, the second clutch is used to connect or disconnect the second gear and the second shaft, and the third clutch is used to connect or disconnect the third gear and the second shaft;

[0010] The controller is electrically connected to the engine, the first motor, the second motor, the first clutch, the second clutch and the third clutch respectively.

[0011] In a possible implementation, the second shaft is a hollow shaft, and the second shaft is sleeved outside the first shaft.

[0012] In one possible implementation, the controller is used to: when the vehicle is in a pure electric gear drive mode, control the first motor to work, control the second motor and the engine to stop working, control the second clutch to engage, and control the first clutch and the third clutch to disengage.

[0013] In one possible implementation, the controller is used to: when the vehicle is in a pure electric gear drive mode, control the first motor to operate, control the second motor and the engine to stop operating, control the third clutch to engage, and control the first clutch and the second clutch to disengage.

[0014] In one possible implementation, the controller is used to: when the vehicle is in a parallel hybrid gear drive mode, control the engine, the first motor and the second motor to operate, control the second clutch to engage, and control the first clutch and the third clutch to disengage.

[0015] In one possible implementation, the controller is used to: when the vehicle is in a parallel hybrid gear driving mode, control the engine, the first motor and the second motor to operate, control the third clutch to engage, and control the first clutch and the second clutch to disengage.

[0016] In one possible implementation, the controller is used to: when the vehicle is in the engine direct drive mode, control the engine and the first motor to work, control the second motor to stop working, control the first clutch and the second clutch to engage, and control the third clutch to disengage.

[0017] In one possible implementation, the controller is used to: when the vehicle is in the engine direct drive mode, control the engine and the first motor to work, control the second motor to stop working, control the first clutch and the third clutch to engage, and control the second clutch to disengage.

[0018] In a possible implementation, the first clutch, the second clutch, and the third clutch are all electromagnetic clutches.

[0019] In a second aspect, the present disclosure provides a vehicle, comprising the vehicle speed transmission system of the first aspect and possible implementations thereof.

[0020] The technical solution provided by the present disclosure includes at least the following beneficial effects:

[0021] The present disclosure provides a vehicle speed transmission system, in which a controller 7 is electrically connected to a first clutch 61, a second clutch 62 and a third clutch 63, respectively. By controlling the first clutch 61, the second clutch 62 and the third clutch 63 to be in an engaged state or a disengaged state, the engine 1, the first motor 2, the second motor 3, the first transmission assembly 4 and the second transmission assembly 5 are combined into different power systems, and different driving modes are applicable under different working conditions, thereby improving the diversity of the driving modes of the vehicle speed transmission system.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, 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 disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 1 is a schematic structural diagram of a vehicle speed transmission system according to an embodiment of the present disclosure;

[0025] Figure 2 1 is a schematic structural diagram of a vehicle speed transmission system according to an embodiment of the present disclosure;

[0026] Figure 3 1 is a schematic structural diagram of a vehicle speed transmission system according to an embodiment of the present disclosure;

[0027] Figure 4 1 is a schematic structural diagram of a vehicle speed transmission system according to an embodiment of the present disclosure;

[0028] Figure 5 1 is a schematic structural diagram of a vehicle speed transmission system according to an embodiment of the present disclosure;

[0029] Figure 61 is a schematic structural diagram of a vehicle speed transmission system according to an embodiment of the present disclosure;

[0030] Figure 7 It is a structural schematic diagram of a vehicle speed transmission system shown in an embodiment of the present disclosure.

[0031] Legend

[0032] 1. Engine;

[0033] 2. First motor;

[0034] 3. Second motor;

[0035] 4. First transmission assembly;

[0036] 41. First shaft; 42. First gear; 43. Second shaft; 44. Second gear; 45. Third gear;

[0037] 5. Second transmission assembly;

[0038] 51. Fourth gear; 52. Fifth gear; 53. Sixth gear; 54. Planetary gear set; 55. Seventh gear; 56. Third shaft;

[0039] 541, sun gear; 542, planet gear; 543, planet carrier; 544, ring gear;

[0040] 6. Drive components;

[0041] 61. First clutch; 62. Second clutch; 63. Third clutch;

[0042] 7. Controller;

[0043] 100. Wheel body. DETAILED DESCRIPTION

[0044] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present disclosure belongs. The words “first”, “second”, “third” and similar terms used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as “a” or “an” do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as “include” or “comprise” mean that the elements or objects appearing before “include” or “comprises” include the elements or objects listed after “include” or “comprises” and their equivalents, and do not exclude other elements or objects. Words such as “connect” or “connected” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Up”, “down”, “left”, “right” and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0046] Nowadays, with the continuous advancement of new energy technologies, the market share of new energy vehicles is gradually increasing. Compared with pure electric systems, hybrid systems can use the engine to provide electricity when the battery is low, which can alleviate users' range anxiety. Compared with traditional variable speed transmission systems, they can use electricity to provide torque to the wheels, which is more environmentally friendly and energy-saving. Therefore, the application of hybrid systems is becoming more and more widespread. However, at present, hybrid power drive mode is mainly achieved by vehicle variable speed transmission systems. Vehicle variable speed transmission systems are mostly developed based on traditional automatic transmissions, that is, the motor is simply integrated into the front or rear end of transmissions such as AT, AMT, CVT or DCT. The above-mentioned vehicle variable speed transmission systems can meet simple transmission requirements, but due to their simple structure, the corresponding operating mode of the vehicle variable speed transmission system is relatively simple. The vehicle variable speed transmission system cannot effectively adapt to the different operating conditions during vehicle driving, which seriously affects the fuel saving rate and performance of the vehicle variable speed transmission system.

[0047] The embodiment of the present disclosure provides a vehicle speed transmission system, such as Figure 1 As shown, the vehicle transmission system includes an engine 1 , a first motor 2 , a second motor 3 , a first transmission assembly 4 , a second transmission assembly 5 , a drive assembly 6 and a controller 7 .

[0048] See also Figure 1The first transmission assembly 4 includes a first shaft 41, a first gear 42, a second shaft 43, a second gear 44 and a third gear 45. The first shaft 41 is transmission-connected to the engine 1, the first gear 42 is fixed outside the first shaft 41, the second shaft 43 is transmission-connected to the first shaft 41 and the first motor 2 respectively, and the second gear 44 and the third gear 45 are transmission-connected to the second shaft 43 respectively. The second transmission assembly 5 includes a fourth gear 51, a fifth gear 52, a sixth gear 53, a planetary gear set 54, a seventh gear 55 and a third shaft 56. The second motor 3 is transmission-connected to the sun gear 541 in the planetary gear set 54. The fourth gear 51 is meshed with the first gear 42 and is transmission-connected to the planet carrier 543 in the planetary gear set 54. The fifth gear 52, the sixth gear 53 and the seventh gear 55 are fixed at intervals outside the third shaft 56. The fifth gear 52 is meshed with the second gear 44, and the sixth gear 53 is meshed with the third gear 45. The first transmission ratio is between the fifth gear 52 and the second gear 44, and the second transmission ratio is between the sixth gear 53 and the third gear 45. The first transmission ratio is not equal to the second transmission ratio. The seventh gear 55 is used to be transmission-connected to the wheel body 100 of the vehicle. The third shaft 56 is transmission-connected to the ring gear 544 in the planetary gear set 54.

[0049] The engine 1, the first motor 2, and the second motor 3 can all serve as power sources to provide output torque for rotating the vehicle's wheels 100. The drive assembly 6 includes a first clutch 61, a second clutch 62, and a third clutch 63. The first clutch 61 is used to connect or disconnect the second shaft 43 from the first shaft 41, the second clutch 62 is used to connect or disconnect the second gear 44 from the second shaft 43, and the third clutch 63 is used to connect or disconnect the third gear 45 from the second shaft 43. The controller 7 is electrically connected to the first clutch 61, the second clutch 62, and the third clutch 63, respectively.

[0050] It is understandable that the “electrical connection” mentioned in the embodiments of the present disclosure may be an electrical connection achieved by a direct physical connection between components, or an electrical connection achieved by a wire between components.

[0051] Specifically, the first shaft 41 is in transmission connection with the engine 1, and the first shaft 41 can be fixedly connected to the output shaft of the engine 1 to achieve a circumferential transmission connection. The first shaft 41 and the output shaft of the engine 1 can be connected by a coupling, which is not limited in the present embodiment. The first gear 42 is fixed to the outside of the first shaft 41, and the first gear 42 can be fixedly connected to the outer wall of the first shaft 41 by a key connection, or the first gear 42 and the first shaft 41 can be integrally formed, and the first gear 42 is located on the outer ring of the first shaft 41. This is not limited in the present embodiment. The second shaft 43 is in transmission connection with the first motor 2, and the second shaft 43 can be fixedly connected to the output shaft of the first motor 2 to achieve a circumferential transmission connection. The second shaft 43 and the output shaft of the first motor 2 can be connected by a coupling, which is not limited in the present embodiment. The sun gear 541 is connected to the second motor 3 in a transmission manner. The sun gear 541 can be fixedly connected to the output shaft of the second motor 3 to achieve a circumferential transmission connection, or the sun gear 541 can be connected to the output shaft of the second motor 3 in a transmission manner through a transmission mechanism. This is not limited in the embodiments of the present disclosure.

[0052] In practice, the first clutch 61 is used to engage or disengage the second shaft 43 from the first shaft 41. Specifically, when the first clutch 61 is in operation, the second shaft 43 and the first shaft 41 are connected in a circumferential transmission manner. When the first clutch 61 is not in operation, the second shaft 43 and the first shaft 41 are not connected in a circumferential transmission manner, and rotation of the first shaft 41 or the second shaft 43 cannot drive the other component to rotate. The second clutch 62 is used to engage or disengage the second shaft 43 and the second gear 44. Specifically, when the second clutch 62 is in operation, the second shaft 43 and the second gear 44 are connected in a circumferential transmission manner. When the second clutch 62 is not in operation, the second shaft 43 and the second gear 44 are not connected in a circumferential transmission manner, and rotation of the second shaft 43 or the second gear 44 cannot drive the other component to rotate. The third clutch 63 is used to connect or disconnect the second shaft 43 and the third gear 45. That is, when the third clutch 63 is working, the second shaft 43 and the third gear 45 are circumferentially connected. When the third clutch 63 is not working, the second shaft 43 and the third gear 45 cannot be circumferentially connected. The rotation of the second shaft 43 or the third gear 45 cannot drive the other component to rotate.

[0053] Furthermore, the planetary gear set 54 includes a sun gear 541, planetary gears 542, a planetary carrier 543 and a ring gear 544. The ring gear 544 is mounted on the outside of the sun gear 541. The inner ring of the ring gear 544 has internal teeth, and the outer ring of the sun gear 541 has external teeth. There are multiple planetary gears 542, and multiple planetary gears 542 are arranged at intervals between the sun gear 541 and the ring gear 544. Each planetary gear 542 is respectively engaged with the sun gear 541 and the ring gear 544. The planetary carrier 543 is fixedly connected to the multiple planetary gears 542. When the multiple planetary gears 542 revolve around the sun gear 541, the planetary carrier 543 rotates coaxially with the sun gear 541.

[0054] It can be understood that the transmission connection in the embodiment of the present disclosure can achieve simultaneous rotation in the same direction and at the same speed, or simultaneous stoppage of rotation. For example, the output shaft of the above-mentioned second motor 3 is transmission-connected with the first sun gear 541, that is, when the output shaft of the second motor 3 rotates, it will drive the first sun gear 541 to rotate in the same direction and at the same speed. When the first sun gear 541 rotates, it will drive the output shaft of the second motor 3 to rotate in the same direction and at the same speed. When the output shaft of the second motor 3 stops rotating, the first sun gear 541 also stops rotating at the same time.

[0055] In this way, the controller 7 can control the engagement or disengagement of the first clutch 61, the second clutch 62 and the third clutch 63, thereby combining the engine 1, the first motor 2, the second motor 3, the first transmission assembly 4, and the second transmission assembly 5 into different power systems, thereby realizing different driving modes, and then realizing different speed adjustment ranges of the vehicle's wheel body 100, thereby improving the diversity of the driving modes of the vehicle's speed transmission system.

[0056] In one example, the first transmission ratio is between the fifth gear 52 and the second gear 44, and the second transmission ratio is between the sixth gear 53 and the third gear 45. The first transmission ratio is greater than 1, and the second transmission ratio is less than 1. That is, under the transmission action of the second gear 44 and the fifth gear 52, the rotational speed of the third shaft 56 is greater than the rotational speed of the second shaft 43. Under the transmission action of the third gear 45 and the sixth gear 53, the rotational speed of the third shaft 56 is less than the rotational speed of the second shaft 43.

[0057] In some possible embodiments, the second shaft body 43 is a hollow shaft.

[0058] like Figure 1 As shown, the second shaft 43 is a hollow shaft. The axial length of the second shaft 43 is smaller than the axial length of the first shaft 41 . The second shaft 43 is sleeved outside the first shaft 41 and is rotatably connected to the first shaft 41 .

[0059] In implementation, multiple bearings can be arranged between the first shaft 41 and the second shaft 43 to reduce the rotational friction between the first shaft 41 and the second shaft 43. The first clutch 61 is arranged between the first shaft 41 and the second shaft 43 and is connected to the first shaft 41 and the second shaft 43 respectively.

[0060] In this way, the overall size of the vehicle transmission system can be reduced.

[0061] In some possible embodiments, the vehicle transmission system further includes a power battery, which is electrically connected to the first motor 2 and the second motor 3, respectively, for providing electrical energy to the first motor 2 and the second motor 3, or for recovering electrical energy through the first motor 2 and the second motor 3.

[0062] In some possible embodiments, the controller 7 is configured to control the vehicle transmission system to switch to a pure electric driving mode.

[0063] In implementation, the controller 7 is electrically connected to the power battery of the vehicle to obtain the power value of the power battery. When the power value is greater than a power threshold, the controller 7 controls the vehicle transmission system to switch to a pure electric drive mode.

[0064] Specifically, when the vehicle speed is greater than the first speed threshold, Figure 2 As shown, the controller 7 controls the vehicle transmission system to switch to the pure electric 1st gear drive mode. In this mode, the controller 7 controls the first motor 2 to operate, controls the second motor 3 and the engine 1 to stop operating, controls the second clutch 62 to engage, and controls the first clutch 61 and the third clutch 63 to disengage.

[0065] In the pure electric 1st gear drive mode, electrical energy is converted into mechanical energy through the first motor 2, and the torque output by the first motor 2 is transmitted to the second shaft 43 through the output shaft of the first motor 2, and then passes through the second shaft 43, the second clutch 62, the second gear 44, the fifth gear 52, the third shaft 56, and the seventh gear 55 to reach the vehicle's wheel body 100, driving the vehicle to move.

[0066] Furthermore, when the vehicle speed is less than the first speed threshold, Figure 3 As shown, the controller 7 controls the vehicle transmission system to switch to the pure electric 2nd gear drive mode. In this mode, the controller 7 controls the first motor 2 to operate, controls the second motor 3 and the engine 1 to stop operating, controls the third clutch 63 to engage, and controls the first clutch 61 and the second clutch 62 to disengage.

[0067] In the pure electric 2nd gear drive mode, electrical energy is converted into mechanical energy through the first motor 2, and the torque output by the first motor 2 is transmitted to the second shaft 43 through the output shaft of the first motor 2, and then passes through the second shaft 43, the third clutch 63, the third gear 45, the sixth gear 53, the third shaft 56, and the seventh gear 55 to reach the vehicle's wheel body 100, driving the vehicle to move.

[0068] In this way, the controller 7 can determine whether to switch to pure electric drive mode based on the remaining power of the power battery. When the remaining power of the power battery is sufficient, the controller 7 switches the vehicle transmission system to pure electric drive mode, driving the vehicle solely by electric energy, which can reduce vehicle fuel consumption. At the same time, the controller 7 can also switch to first gear or second gear based on vehicle speed, improving the driving flexibility of the vehicle transmission system.

[0069] Exemplarily, the battery threshold may be 55%, and the first speed threshold may be 50 km / h.

[0070] It is understandable that in pure electric drive mode, when the vehicle is reversing and braking, the wheel body 100 will generate negative torque on the first motor 2, thereby converting the kinetic energy of the entire vehicle into electrical energy and storing it in the vehicle's power battery.

[0071] In some possible embodiments, the controller 7 is configured to control the vehicle transmission system to switch to a parallel hybrid driving mode.

[0072] In implementation, the controller 7 is electrically connected to the vehicle's power battery to obtain the power value of the power battery. When the power value is less than the power threshold and the vehicle's driving speed is less than the second speed threshold, the controller 7 controls the vehicle's transmission system to switch to the parallel hybrid drive mode.

[0073] The second speed threshold is greater than the first speed threshold.

[0074] Specifically, the controller may also pre-store a third speed threshold, which is greater than the first speed threshold and less than the second speed threshold. When the vehicle speed is greater than the first speed threshold and less than the third speed threshold, the controller 7 controls the vehicle transmission system to switch to the parallel hybrid 1st gear drive mode. In this mode, if Figure 4 As shown, the controller 7 controls the engine 1 , the first motor 2 and the second motor 3 to operate, controls the second clutch 62 to engage, and controls the first clutch 61 and the third clutch 63 to disengage.

[0075] In the parallel hybrid 1st gear driving mode, the torque output by the engine 1 is transmitted to the carrier 543 through the first shaft body 41, the first gear 42 and the fourth gear 51, the torque output by the second motor 3 is transmitted to the carrier 543 through the output shaft of the second motor 3 and the sun gear 541, the mechanical energy transmitted to the carrier 543 and the sun gear 541 is decoupled, and the decoupled torque is transmitted to the third shaft body 56 through the ring gear 544. In another path, the electric energy is converted into mechanical energy by the first motor 2, the torque output by the first motor 2 is transmitted to the second shaft body 43 through the output shaft of the first motor 2, and then transmitted to the third shaft body 56 through the second shaft body 43, the second clutch 62, the second gear 44, the fifth gear 52, and finally transmitted to the wheel body 100 of the vehicle through the seventh gear 55 to drive the vehicle to run.

[0076] Further, when the vehicle speed is greater than the third speed threshold and less than the second speed threshold, the controller 7 controls the vehicle transmission system to switch to the parallel hybrid 2nd gear driving mode, as shown in FIG. 6. In this mode, the torque output by the engine 1 and the second motor 3 remains unchanged, but in another path, the electric energy is converted into mechanical energy by the first motor 2, the torque output by the first motor 2 is transmitted to the second shaft body 43 through the output shaft of the first motor 2, and then transmitted to the third shaft body 56 through the second shaft body 43, the third clutch 63, the third gear 45, the sixth gear 53, and finally transmitted to the wheel body 100 of the vehicle through the seventh gear 55 to drive the vehicle to run. Figure 5

[0077] In this way, the controller 7 can determine whether to switch to the pure electric driving mode according to the remaining power of the power battery. When the remaining power of the power battery is not sufficient, the controller 7 controls the vehicle transmission system to switch to the parallel hybrid driving mode, and drives the vehicle to run by the electric energy and the chemical energy in the fuel, thereby meeting the power demand of the vehicle. On the other hand, since the torque output by the carrier 543 and the torque output by the sun gear 541 are decoupled, the speed of the engine 1 can always be within the optimal speed range by controlling the speed of the output shaft of the second motor 3, thereby improving the fuel efficiency of the vehicle. On the other hand, the controller 7 can determine whether to switch to the 1st gear operation or the 2nd gear operation according to the vehicle speed, thereby improving the driving flexibility of the vehicle transmission system.

[0078] For example, the second speed threshold can be 90 km / h, and the third speed threshold can be 70 km / h. The optimal speed range of the engine 1 is [2000 r / min, 3000 r / min].

[0079] In some possible embodiments, the controller 7 is configured to control the vehicle transmission system to switch to the engine direct drive mode.

[0080] ​During implementation, the controller 7 is electrically connected to the vehicle's power battery to obtain the power value of the power battery. When the power value is less than the power threshold and the vehicle's driving speed is greater than the second speed threshold, the controller 7 controls the vehicle's transmission system to switch to the parallel hybrid drive mode.

[0081] Specifically, the controller may also pre-store a fourth speed threshold, which is greater than the second speed threshold. When the vehicle speed is greater than the second speed threshold and less than the fourth speed threshold, the controller 7 controls the vehicle transmission system to switch to the engine direct drive 1st gear mode. In this mode, if Figure 6 As shown, the controller 7 controls the engine 1 and the first motor 2 to operate, controls the second motor 3 to stop operating, controls the first clutch 61 and the second clutch 62 to engage, and controls the third clutch 63 to disengage.

[0082] In the engine direct drive 1st gear mode, the first shaft 41 and the second shaft 43 are combined, the torque output by the engine 1 is transmitted to the second shaft 43 through the first shaft 41, and the torque output by the first motor 2 is transmitted to the second shaft 43 through the output shaft of the first motor 2. After the torque is aggregated on the second shaft 43, it is transmitted to the third shaft 56 through the second clutch 62, the second gear 44, and the fifth gear 52. The torque reaching the third shaft 56 is aggregated and reaches the vehicle's wheel body 100 through the seventh gear 55, driving the vehicle to move.

[0083] Furthermore, when the vehicle speed is greater than the fourth speed threshold, as Figure 7 As shown, controller 7 controls the vehicle transmission system to switch to engine direct drive 2nd gear mode. It activates engine 1 and first motor 2, deactivates second motor 3, engages first clutch 61 and third clutch 63, and disengages second clutch 62. The torque transmission path between engine 1 and first motor 2 can be found in the above description and will not be repeated here.

[0084] In this way, the controller 7 can determine whether to switch to the pure electric drive mode based on the remaining power of the power battery and the vehicle's driving speed. When the remaining power of the power battery is insufficient and the vehicle speed is fast, the controller 7 switches the vehicle's speed transmission system to the engine direct drive mode. In this mode, the first shaft 41 and the second shaft 43 are combined, and the torque output by the engine 1 and the torque output by the first motor 2 can be superimposed and transmitted to the wheel body 100 to drive the vehicle and meet the vehicle's power requirements.

[0085] Exemplarily, the fourth speed threshold may be 120 km / h.

[0086] In some possible embodiments, the first clutch 61, the second clutch 62, and the third clutch 63 are all electromagnetic clutches. In this way, the working stability of the driving assembly 6 can be improved, and the layout cost of the vehicle transmission system can be reduced.

[0087] The technical solutions provided by the embodiments of the present disclosure have at least the following beneficial effects:

[0088] The embodiments of the present disclosure provide a vehicle transmission system. In the vehicle transmission system, the controller 7 is electrically connected with the first clutch 61, the second clutch 62, and the third clutch 63. By controlling the first clutch 61, the second clutch 62, and the third clutch 63 to be in a combined state or a separated state, the engine 1, the first motor 2, the second motor 3, the first transmission assembly 4, and the second transmission assembly 5 are combined into different power systems. In different working conditions, different driving modes are applicable, and the diversity of the driving modes of the vehicle transmission system is improved.

[0089] The above merely describes optional embodiments of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A vehicle transmission system, characterized in that: The vehicle speed transmission system comprises an engine (1), a first motor (2), a second motor (3), a first transmission assembly (4), a second transmission assembly (5), a drive assembly (6) and a controller (7); The first transmission assembly (4) comprises a first shaft (41), a first gear (42), a second shaft (43), a second gear (44) and a third gear (45); the first shaft (41) is in transmission connection with the engine (1); the first gear (42) is fixed to the outside of the first shaft (41); the second shaft (43) is in transmission connection with the first shaft (41) and the first motor (2); the second gear (44) and the third gear (45) are in transmission connection with the second shaft (43) respectively; The second transmission assembly (5) comprises a fourth gear (51), a fifth gear (52), a sixth gear (53), a planetary gear set (54), a seventh gear (55) and a third shaft (56); the second motor (3) is connected to the sun gear (541) in the planetary gear set (54); the fourth gear (51) is meshed with the first gear (42) and is connected to the planet carrier (543) in the planetary gear set (54); the fifth gear (52), the sixth gear (53) and the seventh gear (55) are fixed to the third shaft at intervals. (56), the fifth gear (52) is meshed with the second gear (44), the sixth gear (53) is meshed with the third gear (45), the fifth gear (52) and the second gear (44) have a first transmission ratio, the sixth gear (53) and the third gear (45) have a second transmission ratio, the first transmission ratio is not equal to the second transmission ratio, the seventh gear (55) is used for transmission connection with the wheel body (100) of the vehicle, and the third shaft (56) is transmission connected with the ring gear (544) in the planetary gear set (54); The drive assembly (6) includes a first clutch (61), a second clutch (62) and a third clutch (63), wherein the first clutch (61) is used to connect or disconnect the second shaft (43) and the first shaft (41), the second clutch (62) is used to connect or disconnect the second gear (44) and the second shaft (43), and the third clutch (63) is used to connect or disconnect the third gear (45) and the second shaft (43); The controller (7) is electrically connected to the engine (1), the first motor (2), the second motor (3), the first clutch (61), the second clutch (62) and the third clutch (63) respectively.

2. The vehicle transmission system according to claim 1, wherein: The second shaft (43) is a hollow shaft, and the second shaft (43) is sleeved onto the outside of the first shaft (41).

3. The vehicle transmission system according to claim 1, wherein: The controller (7) is used to: when the vehicle is in a pure electric first gear driving mode, control the first motor (2) to operate, control the second motor (3) and the engine (1) to stop operating, control the second clutch (62) to engage, and control the first clutch (61) and the third clutch (63) to disengage.

4. The vehicle transmission system according to claim 1, wherein: The controller (7) is used to: when the vehicle is in a pure electric second-gear driving mode, control the first motor (2) to operate, control the second motor (3) and the engine (1) to stop operating, control the third clutch (63) to engage, and control the first clutch (61) and the second clutch (62) to disengage.

5. The vehicle transmission system according to claim 1, wherein: The controller (7) is used to control the engine (1), the first motor (2) and the second motor (3) to operate, control the second clutch (62) to engage, and control the first clutch (61) and the third clutch (63) to disengage when the vehicle is in a parallel hybrid first gear driving mode.

6. The vehicle transmission system according to claim 1, wherein: The controller (7) is used to control the engine (1), the first motor (2) and the second motor (3) to operate, control the third clutch (63) to engage, and control the first clutch (61) and the second clutch (62) to disengage when the vehicle is in a parallel hybrid 2-speed driving mode.

7. The vehicle transmission system according to claim 1, wherein: The controller (7) is used to: when the vehicle is in the engine direct drive first gear mode, control the engine (1) and the first motor (2) to operate, control the second motor (3) to stop operating, control the first clutch (61) and the second clutch (62) to engage, and control the third clutch (63) to disengage.

8. The vehicle transmission system according to claim 1, wherein: The controller (7) is used to: when the vehicle is in the engine direct drive 2nd gear mode, control the engine (1) and the first motor (2) to work, control the second motor (3) to stop working, control the first clutch (61) and the third clutch (63) to engage, and control the second clutch (62) to disengage.

9. The vehicle transmission system according to any one of claims 1 to 8, characterized in that: The first clutch (61), the second clutch (62) and the third clutch (63) are all electromagnetic clutches.

10. A vehicle, characterized in that: The vehicle comprises a vehicle speed transmission system according to any one of claims 1 to 9.

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