Dual clutch transmission drive system, control method thereof, and vehicle

Abstract

The application discloses a kind of double clutch transmission drive system and its control method and vehicle.Therein, double clutch transmission drive system includes transmission, engine, drive motor and generator, transmission includes: first input shaft, first input shaft is connected with engine by first clutch;Second input shaft, second input shaft is connected with drive motor;Middle shaft, middle shaft is connected with first input shaft by first gear pair and second gear pair, middle shaft is connected with second input shaft by third gear pair;Output shaft, output shaft is drivingly connected with middle shaft by fourth gear pair;Synchronizer, synchronizer is fixed to middle shaft and is located between first gear pair and second gear pair.The application solves the technical problem of power interruption when shifting in engine driving mode or motor driving mode.

Description

Technical Field

[0001] This invention relates to the field of transmissions, and more specifically, to a dual-clutch transmission drive system, its control method, and a vehicle. Background Technology

[0002] Currently, hybrid vehicles are developing rapidly among my country's new energy vehicles. A hybrid vehicle is a vehicle that uses multiple energy sources, possessing a powertrain that utilizes two or more onboard energy sources, including electricity. Hybrid vehicles, which use a traditional internal combustion engine and batteries as their power system, have become a hot topic in current automotive powertrain research due to their advantages such as low energy consumption, low emissions, and low price.

[0003] The transmission is an important component of a car's powertrain. In some existing longitudinal transmissions, when shifting gears in engine-driven or electric motor-driven modes via synchronizers, a brief interruption of power may occur due to the working principle of the synchronizers, resulting in a poor driving experience for the driver. Summary of the Invention

[0004] This invention provides a dual-clutch transmission drive system, its control method, and a vehicle, to at least solve the technical problem of power interruption during gear shifting in engine-driven or electric motor-driven modes.

[0005] According to a first aspect of the present invention, a dual-clutch transmission drive system is provided, including an engine, a drive motor, and a generator. The transmission includes: a first input shaft connected to the engine via a first clutch; a second input shaft connected to the drive motor; an intermediate shaft connected to the first input shaft via a first gear pair and a second gear pair, and connected to the second input shaft via a third gear pair; an output shaft connected to the intermediate shaft via a fourth gear pair; and a synchronizer fixed to the intermediate shaft and located between the first and second gear pairs.

[0006] Optionally, the first gear pair includes a first driving gear and a first driven gear, and the second gear pair includes a second driving gear and a second driven gear. The first driving gear and the second driving gear are fixed to the first input shaft, and the first driven gear and the second driven gear are fixed to the intermediate shaft. The synchronizer is located between the first driven gear and the second driven gear.

[0007] Optionally, the third gear pair includes a third driving gear and a third driven gear, with the third driving gear fixed to the second input shaft and the third driven gear fixed to the intermediate shaft.

[0008] Optionally, the fourth gear pair includes a fourth driving gear and a fourth driven gear, with the fourth driving gear fixed to the intermediate shaft and the fourth driven gear fixed to the output shaft.

[0009] Optionally, it also includes a generator shaft, which is connected to the generator via a second clutch and connected to the first input shaft via a fifth gear pair. The fifth gear pair includes a first driving gear and a fifth driven gear, with the fifth driven gear fixed to the generator shaft.

[0010] Optionally, the second input shaft is coaxial with the first input shaft, and the second input shaft is sleeved on the first input shaft.

[0011] According to a second aspect of the present invention, a control method for a dual-clutch transmission drive system is also provided, applied to a hybrid vehicle. The hybrid vehicle includes a dual-clutch transmission drive system, which includes an engine, a drive motor, and a generator. The control method for the dual-clutch transmission drive system includes:

[0012] The system acquires a mode control command, which is used to control the hybrid vehicle to switch operating modes. Based on the mode control command, it controls the hybrid vehicle to enter the corresponding operating mode. When the mode control command is an engine-driven mode command or a generator-driven mode command, controlling the hybrid vehicle to enter the corresponding mode includes: controlling the engine or generator to start; acquiring a shift command, where the shift command is the shift command when the hybrid vehicle is in generator-driven mode or engine-driven mode; responding to the shift command, controlling the drive motor to start, where the drive motor provides power to the output shaft, and the power is transmitted to the output shaft sequentially through the second input shaft, the third gear pair, the intermediate shaft, and the fourth gear pair; responding to the start of the drive motor, controlling the synchronizer to perform gear shifting.

[0013] Optionally, in response to the start of the drive motor, controlling the synchronizer to shift gears includes: determining the driving mode of the hybrid vehicle; in response to the hybrid vehicle being in engine drive mode, controlling the generator to shut down, the first clutch to close, and the second clutch to open; and controlling the synchronizer to shift gears.

[0014] Optionally, controlling the synchronizer to shift gears in response to the start of the drive motor further includes: determining the driving mode of the hybrid vehicle; controlling the engine to shut down, the first clutch to open, and the second clutch to close in response to the hybrid vehicle being in generator drive mode; and controlling the synchronizer to shift gears.

[0015] Optionally, when the mode control command is a series drive mode, controlling the hybrid vehicle to enter the corresponding operating mode includes: controlling the engine, drive motor and generator to start, and controlling the first clutch and the second clutch to close.

[0016] Optionally, when the mode control command is parallel drive mode, controlling the hybrid vehicle to enter the corresponding operating mode includes: controlling the engine and drive motor to start, controlling the first clutch to close and the second clutch to open.

[0017] Optionally, when the mode control command is the idle power generation mode, controlling the hybrid vehicle to enter the corresponding operating mode includes: controlling the engine and generator to start, the drive motor to shut down, and controlling the first clutch and the second clutch to close.

[0018] According to a third aspect of the present invention, a vehicle is also provided, the vehicle including a memory and a processor, and further including the dual-clutch transmission drive system described in any of the first aspects above, the memory storing a computer program, and the processor being configured to run the computer program to execute the control method of the dual-clutch transmission drive system described in any of the second aspects above.

[0019] In this embodiment of the invention, the dual-clutch transmission drive system includes: a first input shaft connected to an engine via a first clutch; a second input shaft connected to a drive motor; an intermediate shaft connected to the first input shaft via a first gear pair and a second gear pair, and connected to the second input shaft via a third gear pair; an output shaft connected to the intermediate shaft via a fourth gear pair; and a synchronizer fixed to the intermediate shaft and located between the first and second gear pairs. When the vehicle is in engine-driven mode or generator-driven mode and shifting gears, the drive motor generates power, which is sequentially transmitted to the output shaft via the second input shaft, the third gear pair, the intermediate shaft, and the fourth gear pair. The output shaft provides power to the vehicle, thereby solving the problem of power interruption during gear shifting in engine-driven mode or motor-driven mode. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a dual-clutch transmission drive system according to one embodiment of the present invention;

[0022] Figure 2 This is a flowchart illustrating a control method for a dual-clutch transmission drive system according to one embodiment of the present invention.

[0023] Figure 3 This is a mode control comparison diagram of a dual-clutch transmission drive system according to one embodiment of the present invention.

[0024] Reference numerals: Engine 01; Drive motor 02; Generator 03; Battery 04; Intermediate shaft 05; Synchronizer 06; Output shaft 07; Differential 08; Wheel 09; Torsional damper 11; First clutch 12; First input shaft 13; First drive gear 14; First driven gear 15; Second drive gear 16; Second driven gear 17; Second input shaft 21; Third drive gear 22; Third driven gear 23; Second clutch 31; Generator shaft 32; Fifth driven gear 33; Fourth drive gear 51; Fourth driven gear 52. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0028] Reference Figure 1According to an embodiment of the present invention, a dual-clutch transmission drive system is provided, including an engine 01, a drive motor 02, and a generator 03. The transmission includes: a first input shaft 13, which is connected to the engine 01 via a first clutch 12; a second input shaft 21, which is connected to the drive motor 02; an intermediate shaft 05, which is connected to the first input shaft 13 via a first gear pair and a second gear pair, and to the second input shaft 21 via a third gear pair; an output shaft 07, which is connected to the intermediate shaft 05 via a fourth gear pair; and a synchronizer 06, which is fixed to the intermediate shaft 05 and located between the first gear pair and the second gear pair.

[0029] Specifically, the first input shaft 13 is connected to the engine 01 via the first clutch 12. The opening and closing of the first clutch 12 changes the connection state between the first input shaft 13 and the engine 01. When the first clutch 12 is open, the connection between the first input shaft 13 and the engine 01 is broken; when the first clutch 12 is closed, the first input shaft 13 is connected to the engine 01, and the engine 01 can drive the first input shaft 13 to rotate. The second input shaft 21, connected to the drive motor 02, transmits the power provided by the drive motor 02 to the output shaft 07 via the third and fourth gear pairs.

[0030] Intermediate shaft 05 is connected to first input shaft 13 via a first gear pair and a second gear pair, to second input shaft 21 via a third gear pair, and to output shaft 07 via a fourth gear pair. The input power from first input shaft 13 and second input shaft 21 can be transmitted to output shaft 07 via intermediate shaft 05. Synchronizer 06 is disposed on intermediate shaft 05 and located between the first and second gear pairs. Through synchronizer 06, either the first gear pair or the second gear pair can be selectively used to transmit power from first input shaft 13 to intermediate shaft 05.

[0031] It should be noted that the transmission provided by this invention is a longitudinally mounted front-wheel-drive hybrid transmission. In the dual-clutch transmission drive system, the engine 01 and the drive motor 02 are coaxially arranged, and their common axis is the axis of the first input shaft 13. Coaxial arrangement of the engine 01 and drive motor 02 avoids the limitation on the diameter of the drive motor 02 due to the center distance when installing it. Compared to placing the drive motor 02 on one side of the axis of the dual-clutch transmission drive system, the vehicle can install a larger diameter drive motor 02, providing greater torque to the vehicle. The center distance is the distance between the axis of the dual-clutch transmission drive system and the side edge of the vehicle.

[0032] In this embodiment of the invention, the dual-clutch transmission drive system includes: a first input shaft 13, which is connected to an engine 01 via a first clutch 12; a second input shaft 21, which is connected to a drive motor 02; an intermediate shaft 05, which is connected to the first input shaft 13 via a first gear pair and a second gear pair, and to the second input shaft 21 via a third gear pair; an output shaft 07, which is connected to the intermediate shaft 05 via a fourth gear pair; and a synchronizer 06, which is fixed to the intermediate shaft 05 and located between the first and second gear pairs. When the vehicle is in engine-driven mode or generator-driven mode and shifting gears, the drive motor 02 generates power, which is transmitted sequentially through the second input shaft 21, the third gear pair, the intermediate shaft 05, and the fourth gear pair to the output shaft 07. The output shaft 07 provides power to the vehicle, thereby solving the problem of power interruption during gear shifting in engine-driven mode or motor-driven mode.

[0033] In some embodiments of the present invention, the output end of the output shaft 07 is connected to the differential 08, which is disposed on the drive shaft of the wheel 09.

[0034] In some embodiments of the present invention, a torsional damper 11 is provided between the first clutch 12 and the engine 01, and the first input shaft 13 is connected to the engine 01 through the first clutch 12 and the torsional damper 11.

[0035] Optionally, the first gear pair includes a first driving gear 14 and a first driven gear 15, and the second gear pair includes a second driving gear 16 and a second driven gear 17. The first driving gear 14 and the second driving gear 16 are fixed to the first input shaft 13, the first driven gear 15 and the second driven gear 17 are fixed to the intermediate shaft 05, and the synchronizer 06 is located between the first driven gear 15 and the second driven gear 17.

[0036] Specifically, when the first input shaft 13 rotates, the first driving gear 14 fixed to the first input shaft 13 can drive the first driven gear 15 fixed to the intermediate shaft 05 to rotate, and the first driven gear 15 drives the intermediate shaft 05 to rotate. Similarly, when the first input shaft 13 rotates, the second driving gear 16 fixed to the first input shaft 13 can drive the second driven gear 17 to rotate, and the second driven gear 17 drives the intermediate shaft 05 to rotate. The synchronizer 06 located between the first driven gear 15 and the second driven gear 17 can change the meshing condition of the first driven gear 15 and the second driven gear 17 with the corresponding driving gear to achieve gear shifting.

[0037] Optionally, the third gear pair includes a third driving gear 22 and a third driven gear 23, with the third driving gear 22 fixed to the second input shaft 21 and the third driven gear 23 fixed to the intermediate shaft 05.

[0038] Specifically, when the second input shaft 21 rotates, the third driving gear 22 fixed to the second input shaft 21 can drive the third driven gear 23 fixed to the intermediate shaft 05 to rotate, and the third driven gear 23 drives the intermediate shaft 05 to rotate.

[0039] Optionally, the fourth gear pair includes a fourth driving gear 51 and a fourth driven gear 52, with the fourth driving gear 51 fixed to the intermediate shaft 05 and the fourth driven gear 52 fixed to the output shaft 07.

[0040] Specifically, when the intermediate shaft 05 rotates, it drives the fourth drive gear 51 fixed to the intermediate shaft 05 to rotate. The fourth drive gear 51 drives the fourth driven gear 52 fixed to the output shaft 07 to rotate. The fourth driven gear 52 drives the output shaft 07 to rotate to provide power to the wheel 09.

[0041] Optionally, it also includes a generator shaft 32, which is connected to the generator 03 via a second clutch 31. The generator shaft 32 is connected to the first input shaft 13 via a fifth gear pair, which includes a first driving gear 14 and a fifth driven gear 33, with the fifth driven gear 33 fixed to the generator shaft 32.

[0042] Specifically, the generator 03 is located at the rear end of the dual-clutch transmission drive system, and is not coaxial with the first input shaft 13 and the second input shaft 21. It inputs or outputs power through the fifth gear pair. The speed increase of the generator 03 during the charging process can be achieved by adjusting the speed ratio of the fifth gear pair, thereby allowing the selection of a high-speed motor, reducing the size and weight of the generator 03, and lowering costs. The generator 03 can be positioned directly below the first input shaft 13, which is more conducive to placing the generator 03 under the center tunnel of the vehicle. When the speed-increasing diameter of the generator 03 is reduced, the entire transmission can be moved rearward, which is more ergonomic for the overall vehicle layout.

[0043] Optionally, the second input shaft 21 is coaxial with the first input shaft 13, and the second input shaft 21 is sleeved on the first input shaft 13.

[0044] Specifically, the second input shaft 21, which is coaxially arranged with and sleeved on the first input shaft 13, can rotate relative to the first input shaft 13. The arrangement of the second input shaft 21 makes it easier for the drive motor 02, which is coaxially arranged with the engine 01, to provide driving force.

[0045] According to an embodiment of the present invention, an embodiment of a control method for a dual-clutch transmission drive system is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0046] This method embodiment can also be executed in an electronic device, similar control device, or vehicle-mounted terminal that includes a memory and a processor. Taking a vehicle-mounted terminal as an example, the vehicle-mounted terminal may include one or more processors and a memory for storing data. Optionally, the vehicle-mounted terminal may also include a communication device for communication functions and a display device. Those skilled in the art will understand that the above structural description is merely illustrative and does not limit the structure of the vehicle-mounted terminal. For example, the vehicle-mounted terminal may include more or fewer components than those described above, or have a different configuration than those described above.

[0047] A processor may include one or more processing units. For example, a processor may include a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microcontroller unit (MCU), a field-programmable gate array (FPGA), a neural network processing unit (NPU), a tensor processing unit (TPU), or an artificial intelligence (AI) processor. Different processing units may be independent components or integrated into one or more processors. In some instances, electronic devices may also include one or more processors.

[0048] The memory can be used to store computer programs, such as the computer program corresponding to the control method of the dual-clutch transmission drive system in this embodiment of the invention. The processor implements the control method of the dual-clutch transmission drive system by running the computer program stored in the memory. The memory may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include memory remotely located relative to the processor, and these remote memories can be connected to electronic devices via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0049] The communication device is used to receive or send data via a network. Specific examples of the network mentioned above may include a wireless network provided by the mobile terminal's communication provider. In one example, the communication device includes a network interface controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the communication device may be a radio frequency (RF) module, used for wireless communication with the Internet. In some embodiments of this solution, the communication device is used to connect to mobile devices such as mobile phones and tablets, enabling the mobile device to send commands to the vehicle-mounted terminal.

[0050] The display device can be, for example, a touchscreen liquid crystal display (LCD) and a touch display (also referred to as a "touchscreen" or "touch screen"). This LCD allows the user to interact with the user interface of the in-vehicle terminal. In some embodiments, the in-vehicle terminal has a graphical user interface (GUI), which allows the user to interact with the GUI by touching a touch-sensitive surface with fingers and / or gestures. The human-machine interaction functions here include at least the function of switching vehicle operating modes. Executable instructions for performing the aforementioned human-machine interaction functions are configured / stored in one or more processor-executable computer program products or readable storage media.

[0051] Figure 2 This is a flowchart of a control method for a dual-clutch transmission drive system according to an embodiment of the present invention, such as... Figure 2 As shown, this method is applied to hybrid vehicles to control the dual-clutch transmission drive system in hybrid vehicles, and includes the following steps:

[0052] Step S101: Obtain mode control instructions.

[0053] Specifically, mode control commands are used to control the hybrid vehicle to switch operating modes. Mode control commands can be issued via a preset mode switching button on the vehicle, or via a display device installed on the vehicle.

[0054] Step S102: According to the mode control command, control the hybrid vehicle to enter the corresponding working mode.

[0055] Specifically, when the mode control command is an engine-driven mode command or a generator-driven mode command, controlling the hybrid vehicle to enter the corresponding mode includes:

[0056] Step S1021: Control engine 01 or generator 03 to start.

[0057] Specifically, when the mode control command is an engine-driven mode command, engine 01 is started; when the mode control command is a generator-driven mode command, engine 01 is started. In engine-driven mode, the vehicle is powered by engine 01, while in generator-driven mode, the vehicle is powered by generator 03.

[0058] It should be noted that after the engine 01 or generator 03 is started, the vehicle enters the corresponding engine drive mode or generator drive mode. The subsequent steps are the control steps for shifting gears when the vehicle is in engine drive mode or generator drive mode.

[0059] Step S1022: Obtain the shift command.

[0060] Specifically, the shift command refers to the shift command when the hybrid vehicle is in generator drive mode or engine drive mode. When the vehicle is in engine drive mode or generator drive mode, at least two gears can be switched.

[0061] In step S1023, in response to the shift command, the drive motor O2 is started.

[0062] Specifically, the drive motor 02 provides power to the output shaft 07, and the power is transmitted to the output shaft 07 through the second input shaft 21, the third gear pair, the intermediate shaft 05 and the fourth gear pair.

[0063] In step S1024, in response to the start of the drive motor 02, the synchronizer 06 is controlled to shift gears.

[0064] Specifically, when the drive motor 02 starts, it temporarily provides power to the vehicle. When the synchronizer 06 is shifting gears, the power interruption of the engine 01 or generator 03 will not cause the vehicle to lose power.

[0065] Understandably, once the vehicle has shifted gears, the drive motor 02 can be turned off, and the vehicle can continue to be driven solely by the engine 01 or the generator 03.

[0066] Optionally, in step S1024, controlling the synchronizer 06 to shift gears in response to the start of the drive motor 02 may include the following steps:

[0067] Step S1024a: Determine the driving mode of the hybrid vehicle.

[0068] In step S1024b, in response to the hybrid vehicle being in engine drive mode, the generator 03 is shut off, the first clutch 12 is closed, and the second clutch 31 is opened.

[0069] Step S1024c: Control synchronizer 06 to shift gears.

[0070] Specifically, refer to Figure 3 , Figure 3 This is a mode control comparison diagram of a dual-clutch transmission drive system according to one embodiment of the present invention. When the synchronizer 06 is shifting gears, it first acquires the vehicle's drive mode, then determines the vehicle's drive mode. When the vehicle is in engine drive mode, it controls the generator 03 to shut down, the first clutch 12 to close, and the second clutch 31 to open. The engine 01 drive has at least two gears, including engine 01 first gear drive and engine 01 second gear drive. The synchronizer 06 can control the vehicle to switch between engine 01 first gear drive and engine 01 second gear drive.

[0071] For example, when the vehicle is in first gear driven by engine 01, synchronizer 06 engages first gear to the left, first clutch 12 closes, synchronizer 06 engages first gear to the left, engine 01 transmits power to first input shaft 13 through torsional damper 11 and first clutch 12. Then, power is transmitted to first driven gear 15 meshing with it through first drive gear 14 fixed to first input shaft 13. First driven gear 15 transmits power to intermediate shaft 05 through synchronizer 06. Power is transmitted to fourth driven gear 52 meshing with it through fourth drive gear 51 fixed to intermediate shaft 05. Fourth driven gear 52 transmits power to output shaft 07. Output shaft 07 transmits power to wheels 09 through differential 08.

[0072] For example, when the vehicle is in second gear driven by engine 01, the first clutch 12 is engaged, the synchronizer 06 shifts to the right into second gear, and engine 01 transmits power to the first input shaft 13 through torsional damper 11 and the first clutch 12. Then, the power is transmitted to the second driven gear 17 meshing with it through the second drive gear 16 fixed to the first input shaft 13. The second driven gear 17 transmits power to the intermediate shaft 05 through synchronizer 06. The power is then transmitted to the fourth driven gear 52 meshing with it through the fourth drive gear 51 fixed to the intermediate shaft 05. The fourth driven gear 52 transmits power to the output shaft 07. The output shaft 07 transmits power to the wheels 09 through differential 08.

[0073] Optionally, in step S1024, controlling the synchronizer 06 to shift gears in response to the start of the drive motor 02 further includes the following steps:

[0074] Step S1024a: Determine the driving mode of the hybrid vehicle.

[0075] In step S1024d, in response to the hybrid vehicle being in generator drive mode, the engine 01 is shut off, the first clutch 12 is opened, and the second clutch 31 is closed.

[0076] Step S1024e: Control synchronizer 06 to shift gears.

[0077] Specifically, when the synchronizer 06 performs gear shifting, it first acquires the vehicle's drive mode and then determines the drive mode. When the vehicle is in generator drive mode, it controls the engine 01 to shut off, the first clutch 12 to open, and the second clutch 31 to close. The generator 03 drive has at least two gears, including generator 03 first gear drive and generator 03 second gear drive. The synchronizer 06 can control the vehicle to switch between generator 03 first gear drive and generator 03 second gear drive.

[0078] For example, when the vehicle is in second gear driven by the generator 03, the second clutch 31 is engaged, the synchronizer 06 shifts to first gear to the left, and the battery 04 provides energy to the generator 03. The generator 03 transmits power to the fifth driven gear 33 through the second clutch 31 and the generator shaft 32. The fifth driven gear 33 transmits power to the first driving gear 14 that meshes with it. The first driving gear 14 transmits power to the first driven gear 15 that meshes with it. The first driven gear 15 transmits power to the intermediate shaft 05 through the synchronizer 06. The power is then transmitted to the fourth driven gear 52 that meshes with it through the fourth driving gear 51 fixed to the intermediate shaft 05. The fourth driven gear 52 transmits power to the output shaft 07. The output shaft 07 transmits power to the wheels 09 through the differential 08.

[0079] Optionally, refer to Figure 3 When the mode control command is set to series drive mode, controlling the hybrid vehicle to enter the corresponding operating mode includes: controlling the engine 01, drive motor 02, and generator 03 to start, and controlling the first clutch 12 and the second clutch 31 to close. In this mode, the synchronizer 06 is in neutral.

[0080] Specifically, when the vehicle battery 04 is low on power and the vehicle is traveling at low speed, a series drive mode can be used. In this mode, the engine 01, drive motor 02, and generator 03 are started, while the first clutch 12 and the second clutch 31 are engaged. In this drive mode, the engine 01 transmits power to the first input shaft 13 through the torsional damper 11 and the first clutch 12. Then, the first drive gear 14 drives the fifth driven gear 33 to rotate. The fifth driven gear 33 transmits power to the generator shaft 32, which in turn drives the generator 03 through the second clutch 31. The generator 03 stores the generated electrical energy in the battery 04, which then supplies the electrical energy to the drive motor 02. The drive motor 02 converts electrical energy into mechanical energy to drive the second input shaft 21 to rotate. The power of the second input shaft 21 is transmitted to the intermediate shaft 05 through the third drive gear 22 and the third driven gear 23. Finally, the power is transmitted to the fourth driven gear 52 meshing with the fourth drive gear 51 fixed to the intermediate shaft 05. The fourth driven gear 52 transmits the power to the output shaft 07. The output shaft 07 transmits the power to the wheel 09 through the differential 08.

[0081] Optionally, refer to Figure 3 When the mode control command is parallel drive mode, controlling the hybrid vehicle to enter the corresponding working mode includes: controlling the engine 01 and drive motor 02 to start, controlling the first clutch 12 to close and the second clutch 31 to open.

[0082] Specifically, when the vehicle is traveling at medium or low speed with high throttle, a parallel drive mode can be used. In this mode, the engine 01 and drive motor 02 are started, the first clutch 12 is engaged, and the second clutch 31 is disengaged. This drive mode includes parallel first-gear drive and parallel second-gear drive. For example, when the synchronizer 06 engages first gear to the left, the engine 01 transmits power to the first input shaft 13 through the torsional damper 11 and the first clutch 12, then transmits power to the synchronizer 06 through the first drive gear 14 and the first driven gear 15, and finally transmits power to the intermediate shaft 05 through the synchronizer 06. While the engine 01 is working, the drive motor 02 converts electrical energy into mechanical energy of the second input shaft 21. The second input shaft 21 drives the third drive gear 22 to rotate, and transmits the power to the intermediate shaft 05 through the third driven gear 23 meshing with the third drive gear 22. The power provided by the engine 01 and the power provided by the drive motor 02 are combined at the intermediate shaft 05, and then transmitted to the output shaft 07 through the fourth drive gear 51 and the fourth driven gear 52. The output shaft 07 transmits the combined power to the wheels 09 through the differential 08.

[0083] In some embodiments of the present invention, in parallel drive mode, generator 03 can also participate in driving, controlling the second clutch 31 to close. The power output by generator 03 is transmitted to the first input shaft 13 in sequence through generator shaft 32 and fifth driven gear 33. The power provided by generator 03 and the power provided by engine 01 are combined on the first input shaft 13, and then the combined power is transmitted to synchronizer 06 through first driving gear 14 and first driven gear 15. Finally, the power output by generator 03, engine 01 and drive motor 02 are all combined to intermediate shaft 05 and finally transmitted to output shaft 07.

[0084] Optionally, refer to Figure 3 When the mode control command is set to idle power generation mode, controlling the hybrid vehicle to enter the corresponding operating mode includes: starting the engine 01 and generator 03, shutting off the drive motor 02, and closing the first clutch 12 and the second clutch 31. In this mode, the synchronizer 06 is in neutral.

[0085] Specifically, when the vehicle is parked and the battery 04 is depleted, the first clutch 12 and the second clutch 31 are engaged, the engine 01 and generator 03 start, and the drive motor 02 is turned off. In this drive mode, the engine 01 transmits power to the first input shaft 13 through the torsional damper 11 and the first clutch 12, and then drives the fifth driven gear 33 to rotate through the first drive gear 14. The fifth driven gear 33 transmits power to the generator shaft 32, which in turn drives the generator 03 to operate through the second clutch 31. The generator 03 stores the generated electrical energy in the battery 04.

[0086] It should be noted that, in some embodiments of the present invention, the mode control command can be automatically issued by the vehicle itself based on the vehicle's state, thereby automatically switching the operating mode. For example, when the vehicle is detected to be braking, the vehicle automatically issues an energy recovery mode command to control the vehicle to enter the energy recovery mode.

[0087] Specifically, when the vehicle is in energy recovery mode, refer to Figure 3 When the drive motor starts, the mechanical energy at wheel 09 is transmitted to output shaft 07 via differential 08, and then to fourth drive gear 51 via fourth driven gear 52, and finally to intermediate shaft 05 via fourth drive gear 51. The mechanical energy is then transmitted to third drive gear 22 via third driven gear 23 fixed to intermediate shaft 05, and then to second input shaft 21. Drive motor 02 converts the mechanical energy of second input shaft 21 into electrical energy to charge battery 04. In this mode, synchronizer 06 is in neutral.

[0088] It should be noted that when battery 04 has a full charge, the drive motor mode can be used. (Refer to...) Figure 3 In drive motor mode, drive motor 02 starts, engine 01 and generator 03 are shut down, and first clutch 12 and second clutch 31 are engaged. In this mode, battery 04 provides electrical energy to drive motor 02, which converts the electrical energy into mechanical energy for second input shaft 21, causing it to rotate. Second input shaft 21 drives third drive gear 22 to rotate, which in turn drives third driven gear 23, which in turn rotates the third driven gear 23. Power is then transmitted to intermediate shaft 05 via third driven gear 23. Finally, power is transmitted to fourth driven gear 52, which is fixed to intermediate shaft 05, via fourth drive gear 51. Fourth driven gear 52 transmits power to output shaft 07, which then transmits power to wheels 09 via differential 08. In this mode, synchronizer 06 is in neutral.

[0089] It should be noted that in the drive motor drive mode, the generator 03 can also be used for auxiliary drive, controlling the second clutch 31 to close. The power output by the generator 03 is transmitted to the first input shaft 13 through the generator shaft 32 and the fifth driven gear 33 in sequence. Then, the power provided by the generator 03 is transmitted to the synchronizer 06 through the first driving gear 14 and the first driven gear 15. Finally, the power output by the generator 03 and the drive motor 02 are combined to the intermediate shaft 05 and finally transmitted to the output shaft 07.

[0090] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0091] Embodiments of the present invention also provide an electronic device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the steps in the embodiments of the control method for the dual-clutch transmission drive system described above.

[0092] Optionally, in some embodiments, the processor in the above-described electronic device may be configured to run a computer program to perform the following steps:

[0093] Step S101: Obtain mode control instructions.

[0094] Step S102: According to the mode control command, control the hybrid vehicle to enter the corresponding working mode.

[0095] Optionally, in this embodiment, the memory may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0096] Embodiments of the present invention also provide a vehicle, the vehicle including a memory and a processor, and further including the dual-clutch transmission drive system described in any of the above embodiments, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the control method of the vehicle dual-clutch transmission drive system described in any of the above embodiments.

[0097] Optionally, in this embodiment, the processor in the vehicle can be configured to run a computer program to perform the following steps:

[0098] Step S101: Obtain mode control instructions.

[0099] Step S102: According to the mode control command, control the hybrid vehicle to enter the corresponding working mode.

[0100] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0101] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0102] In some embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection of units or modules may be electrical or other forms.

[0103] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0104] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0105] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0106] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A dual clutch transmission drive system comprising an engine, a drive motor and a generator, characterized in that, Also includes: A first input shaft, the first input shaft being connected to the engine via a first clutch; The second input shaft is connected to the drive motor. An intermediate shaft is connected to a first input shaft via a first gear pair and a second gear pair, and the intermediate shaft is connected to the second input shaft via a third gear pair. The first gear pair includes a first driving gear. An output shaft, which is connected to the intermediate shaft via a fourth gear pair; A synchronizer, which is fixed to the intermediate shaft and located between the first gear pair and the second gear pair; A generator shaft is connected to the generator via a second clutch. The generator shaft is connected to the first input shaft via a fifth gear pair, which includes a first driving gear and a fifth driven gear. The fifth driven gear is fixed to the generator shaft.

2. The dual clutch transmission drive system of claim 1, wherein, The first gear pair further includes a first driven gear, and the second gear pair includes a second driving gear and a second driven gear. The first driving gear and the second driving gear are fixed to the first input shaft, and the first driven gear and the second driven gear are loosely fitted onto the intermediate shaft. The synchronizer is located between the first driven gear and the second driven gear.

3. The dual clutch transmission drive system of claim 1, wherein, The third gear pair includes a third driving gear and a third driven gear. The third driving gear is fixed to the second input shaft, and the third driven gear is fixed to the intermediate shaft.

4. The dual clutch transmission drive system of claim 1, wherein, The fourth gear pair includes a fourth driving gear and a fourth driven gear. The fourth driving gear is fixed to the intermediate shaft, and the fourth driven gear is fixed to the output shaft.

5. The dual clutch transmission drive system of claim 1, wherein, The second input shaft is coaxial with the first input shaft, and the second input shaft is sleeved on the first input shaft.

6. A control method of a dual-clutch transmission drive system applied to a hybrid vehicle, characterized by The hybrid vehicle includes a dual-clutch transmission drive system as described in any one of claims 1 to 5, the dual-clutch transmission drive system including an engine, a drive motor, and a generator, and a control method for the dual-clutch transmission drive system for controlling the dual-clutch transmission drive system as described in any one of claims 1 to 5, the control method for the dual-clutch transmission drive system including: Acquire a mode control command, the mode control command being used to control the hybrid vehicle to switch operating modes; According to the mode control command, the hybrid vehicle is controlled to enter the corresponding operating mode. When the mode control command is an engine drive mode command or a generator drive mode command, controlling the hybrid vehicle to enter the corresponding operating mode includes: Control the engine or generator to start; Obtain a shift command, wherein the shift command is a shift command when the hybrid vehicle is in the generator drive mode or the engine drive mode; In response to the shift command, the drive motor is controlled to start, wherein the drive motor provides power to the output shaft, and the power is transmitted to the output shaft successively through the second input shaft, the third gear pair, the intermediate shaft and the fourth gear pair; In response to the start of the drive motor, the synchronizer is controlled to shift gears.

7. The control method of a dual-clutch transmission drive system according to claim 6, characterized by The step of controlling the synchronizer to shift gears in response to the start of the drive motor includes: Determine the driving mode of the hybrid vehicle; In response to the hybrid vehicle being in the engine drive mode, the generator is controlled to shut down, the first clutch is engaged, and the second clutch is disengaged; Control the synchronizer to shift gears.

8. The control method for a dual-clutch transmission drive system according to claim 6, characterized in that, In response to the start of the drive motor, controlling the synchronizer to shift gears further includes: Determine the driving mode of the hybrid vehicle; In response to the hybrid vehicle being in the generator drive mode, the engine is controlled to shut off, the first clutch is engaged, and the second clutch is disengaged; Control the synchronizer to shift gears.

9. The control method of a dual-clutch transmission drive system according to claim 6, characterized by, When the mode control command is a series drive mode, controlling the hybrid vehicle to enter the corresponding operating mode includes: The engine, drive motor, and generator are started, and the first and second clutches are closed.

10. The control method of a dual-clutch transmission drive system according to claim 6, characterized by, When the mode control command is a parallel drive mode, controlling the hybrid vehicle to enter the corresponding operating mode includes: Control the engine and the drive motor to start, and control the first clutch to close and the second clutch to open.

11. The control method of a dual-clutch transmission drive system according to claim 6, characterized by, When the mode control command is the idle power generation mode, controlling the hybrid vehicle to enter the corresponding operating mode includes: Control the engine and generator to start, and control the drive motor to shut down; control the first clutch and the second clutch to engage.

12. A vehicle comprising a memory and a processor, characterized in that The dual-clutch transmission drive system according to any one of claims 1 to 5 is described, wherein the memory stores a computer program, and the processor is configured to run the computer program to perform the control method of the dual-clutch transmission drive system according to any one of claims 6 to 11.

Images