Gear shifting method, device and equipment of hybrid power vehicle, medium and vehicle

Abstract

The invention provides a gear shifting method, device and equipment of a hybrid power vehicle, a medium and the vehicle, and belongs to the technical field of vehicle control. The hybrid power vehicle comprises a whole vehicle control unit and a gearbox control unit, and the method comprises the steps that when the hybrid power vehicle is in a series connection mode, if the whole vehicle control unit receives a starting gear shifting request, power of a power system of the hybrid power vehicle is reduced; if the power of the power system of the hybrid vehicle meets the preset threshold value, the gearbox control unit controls a clutch to be started; if the vehicle control unit determines that the clutch is in the open state, a gear switching instruction is sent to a gearbox control unit; and the gearbox control unit receives the gear switching instruction, switches the current gear to the target gear, and switches to the corresponding starting gear based on the target gear. When the series connection mode starts gear shifting, the clutch is started, the target gear is directly switched, the step-by-step switching process of the middle gear is omitted, and therefore the gear shifting time is remarkably shortened.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle control, and particularly to a shifting method, device, equipment, medium and vehicle for a hybrid vehicle. Background Art

[0002] During the driving process of a hybrid vehicle, the starting and shifting operations are one of the key factors to ensure the efficient operation of the vehicle. Especially in a hybrid vehicle driven by dual motors, due to the complexity of the power system and the requirement of multi-gear switching, the efficiency and speed of starting and shifting are crucial for the driving experience and energy efficiency.

[0003] Currently, hybrid vehicles are usually configured with a series mode, which allows the vehicle to switch between different gears in an orderly manner to meet different driving conditions and requirements. The shifting in the series mode is usually performed in a specific order according to the driving mode, such as the ECO / Normal mode, the light snow mode, and the 4L mode, etc. The series neutral positions (such as N23, N3R, N1R) in each mode are designed as the initial gears when starting in that mode. When the vehicle switches from one mode to another, it is often time-consuming. Summary of the Invention

[0004] In view of the above problems, the present disclosure provides a shifting method, device, equipment, medium and vehicle for a hybrid vehicle, which is used to solve the problem of long starting and shifting time in the series mode of the hybrid vehicle. The technical solutions are as follows:

[0005] A shifting method for a hybrid vehicle, which is used for a hybrid vehicle. The hybrid vehicle includes a vehicle control unit and a transmission control unit. The method includes:

[0006] When the hybrid vehicle is in the series mode, if the vehicle control unit receives a starting and shifting request, reduce the power of the power system of the hybrid vehicle. The series mode includes multiple gears in a specified order, and the starting and shifting request includes a target gear;

[0007] If the power of the power system of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open;

[0008] If the vehicle control unit determines that the clutch is in the open state, send a gear shifting instruction to the transmission control unit. The gear shifting instruction is to switch to the target gear;

[0009] The transmission control unit receives the gear shifting instruction, switches the current gear to the target gear, and switches to the corresponding starting gear based on the target gear.

[0010] It should be noted that in a hybrid vehicle, when the vehicle control unit receives a start-up shift request, it first reduces the power of the powertrain to ensure that the vehicle shifts gears in a safe state. Subsequently, when the power of the powertrain reaches a preset threshold, and thus meets the condition for engaging the clutch, then the transmission control unit engages the clutch. Since the clutch is engaged, the transmission control unit can directly switch the current gear to the target gear instead of shifting through intermediate gears step by step. In this process, due to the direct switch to the target gear, the step-by-step shifting process of intermediate gears is omitted, thus significantly shortening the shift time. Among them, since the clutch is a key component connecting the engine and the transmission, its main function is to allow the engine and the transmission to be temporarily separated during gear shifting, so as to achieve smooth gear shifting. When the clutch is engaged, the power of the engine can be cut off, enabling the transmission to adjust gears independently of the engine.

[0011] Optionally, the power of the powertrain of the hybrid vehicle includes the torque of the powertrain of the hybrid vehicle;

[0012] The determination that the power of the powertrain of the hybrid vehicle meets the preset threshold includes:

[0013] If the torque of the powertrain of the hybrid vehicle is less than a preset torque value.

[0014] It should be noted that in a hybrid vehicle, the function of the clutch is to allow for smooth separation and engagement between the engine and the transmission. When the torque is less than the preset value, the output power of the engine is relatively low, which helps to reduce the impact between the engine and the transmission. When it is necessary to switch the power source (for example, from pure electric mode to hybrid mode), the lower torque output can ensure that the clutch engages smoothly, avoiding damage to the transmission and providing a smoother driving experience.

[0015] Optionally, the power of the powertrain of the hybrid vehicle includes the throttle pedal opening;

[0016] The determination that the power of the powertrain of the hybrid vehicle meets the preset threshold includes:

[0017] If the throttle pedal opening is less than a preset opening angle, it is determined that the power of the powertrain meets the preset threshold.

[0018] It should be noted that by using the throttle pedal opening as a determination condition for the powertrain, when it is detected that the driver actively reduces the pedal opening (below the preset angle), the system can synchronously predict the attenuation trend of power demand. This mechanism changes the trigger point of the clutch disengagement action from the traditional "passive response after the power output weakens" to "synergistic response of driving intention and power control", so that the clutch disengagement preparation starts in the stage when the actual output torque of the engine has not completely decreased. The resulting technical advantages are as follows: By using the instant feedback of the driver's operation intention, the dynamic matching between the engine and the transmission is coordinated in advance. When switching the power source or mode, by reducing the mechanical impact energy of the powertrain, it not only protects the mechanical structures of the clutch and the transmission, but also makes the power connection process actively synchronized with the driver's expected operation, ultimately achieving a seamless mode switching experience and extending the service life of the key components of the transmission system.

[0019] Optionally, the power of the powertrain of the hybrid vehicle includes the first torque of the engine of the hybrid vehicle and the second torque of the motor.

[0020] Reducing the power of the powertrain of the hybrid vehicle includes:

[0021] Reducing the first torque to a first preset value;

[0022] Reducing the second torque to a second preset value.

[0023] It should be noted that in a hybrid vehicle, the function of the clutch is to connect or disconnect the power transmission between the engine and the transmission. When both the first torque (engine torque) and the second torque (motor torque) are reduced to the preset values, the output power of the engine and the motor decreases, which helps to reduce the power impact when the clutch is opened. According to Newton's second law (F = ma), a smaller force means a smaller acceleration change, thus reducing the vibration and noise when the clutch is opened and improving the ride comfort.

[0024] Optionally, switching to the corresponding starting gear based on the target gear includes:

[0025] The transmission control unit requests the motor speed to reach the target speed corresponding to the target gear, controls the clutch to be filled with oil, and closes the clutch;

[0026] The vehicle control unit determines the target crankshaft speed corresponding to the target gear, and performs proportional-integral torque adjustment through torque distribution to increase or decrease the engine speed to the target crankshaft speed.

[0027] It should be noted that when the vehicle starts from a stationary state, the transmission control unit requests the motor speed to reach the target speed corresponding to the target gear and controls the clutch to fill with oil and close. This process ensures that the motor can provide sufficient auxiliary torque at startup and work in coordination with the engine, thereby improving the startup efficiency. According to the power formula (P = Tw, where P is power, T is torque, and w is angular velocity), the coordinated work of the motor and the engine can provide a greater total torque to accelerate the startup process. The vehicle control unit determines the target crankshaft speed corresponding to the target gear and performs proportional-integral torque adjustment through torque distribution to increase or decrease the engine speed. This precise speed control helps to smooth the speed change of the engine and reduce the impact feeling during startup. According to the principles of dynamics, a smooth speed change can reduce the impact on the vehicle and passengers.

[0028] Optionally, before reducing the power of the power system of the hybrid vehicle, the method further includes:

[0029] If it is determined that the target gear is not adjacent to the current gear, execute reducing the power of the power system of the hybrid vehicle.

[0030] It should be noted that for gear shifting in the series mode of a hybrid vehicle, not all cases directly reduce the power of the power system. Instead, it is determined whether to perform the power reduction operation by judging whether the target gear is adjacent to the current gear. When the target gear is adjacent to the current gear, the power of the power system can transition more smoothly because the power output does not need to be significantly reduced, and directly reducing the power may be unnecessary, thus optimizing the power output and avoiding unnecessary energy waste. When the target gear is not adjacent to the current gear, directly reducing the power of the power system can reduce the power impact caused by gear skipping. This is because in gear shifting between non-adjacent gears, the power demand may change significantly, and directly reducing the power helps to buffer this change and reduce the impact on the vehicle and passengers.

[0031] Optionally, before reducing the power of the power system of the hybrid vehicle, the method further includes:

[0032] Determine the number of gears separated between the target gear and the current gear;

[0033] If it is determined that the number of gears is higher than a preset value, execute reducing the power of the power system of the hybrid vehicle.

[0034] It should be noted that when the number of gears between the target gear and the current gear is small, the power of the power system may not need to be significantly reduced because the change in power demand between gears is not large. By setting a preset value, power reduction is only performed when the number of gears apart exceeds this value, which can avoid unnecessary power reduction and thus save energy. When the number of gears apart is large, it means that the power of the power system needs to change significantly to adapt to the new gear. In this case, reducing the power of the power system in advance allows the power system more time to adapt to this change, thereby optimizing the power response and reducing the impact and delay during gear shifting.

[0035] A shift device for a hybrid vehicle, for a hybrid vehicle, the hybrid vehicle including a vehicle control unit and a transmission control unit, the device including:

[0036] A power reduction unit, when the hybrid vehicle is in a series mode, if the vehicle control unit receives a start shift request, reducing the power of the power system of the hybrid vehicle, the series mode including a plurality of gears in a specified order, the start shift request including a target gear;

[0037] A clutch opening unit, if the power of the power system of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open;

[0038] An instruction sending unit, if the vehicle control unit determines that the clutch is in an open state, sending a gear shift instruction to the transmission control unit, the gear shift instruction being to switch to the target gear;

[0039] A gear shift unit, the transmission control unit receiving the gear shift instruction, switching the current gear to the target gear, and switching to the corresponding start gear based on the target gear.

[0040] A shift device for a hybrid vehicle, for a hybrid vehicle, the hybrid vehicle including a vehicle control unit and a transmission control unit, including:

[0041] At least one processor; and,

[0042] A memory communicatively connected to the at least one processor; wherein,

[0043] 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:

[0044] When the hybrid vehicle is in series mode, if the vehicle control unit receives a start shift request, reduce the power of the power system of the hybrid vehicle. The series mode includes multiple gears in a specified order, and the start shift request includes a target gear.

[0045] If the power of the power system of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open.

[0046] If the vehicle control unit determines that the clutch is in the open state, send a gear shift command to the transmission control unit. The gear shift command is to switch to the target gear.

[0047] The transmission control unit receives the gear shift command, switches the current gear to the target gear, and switches to the corresponding starting gear based on the target gear.

[0048] A non - volatile computer storage medium for a hybrid vehicle. The hybrid vehicle includes a vehicle control unit and a transmission control unit, and stores computer - executable instructions. When the computer - executable instructions are executed by a computer, they can implement:

[0049] When the hybrid vehicle is in series mode, if the vehicle control unit receives a start shift request, reduce the power of the power system of the hybrid vehicle. The series mode includes multiple gears in a specified order, and the start shift request includes a target gear.

[0050] If the power of the power system of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open.

[0051] If the vehicle control unit determines that the clutch is in the open state, send a gear shift command to the transmission control unit. The gear shift command is to switch to the target gear.

[0052] The transmission control unit receives the gear shift command, switches the current gear to the target gear, and switches to the corresponding starting gear based on the target gear.

[0053] A vehicle includes the shift method of the above - mentioned hybrid vehicle.

[0054] By means of the above - mentioned technical solution, a shift method, device, equipment, medium and vehicle of a hybrid vehicle provided by the present disclosure are applied to a hybrid vehicle.

[0055] The above description is only an overview of the technical solution of the present disclosure. In order to be able to understand the technical means of the present disclosure more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present disclosure more obvious and understandable, the following specific embodiments of the present disclosure are specifically given. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present disclosure. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0057] Figure 1 A flowchart showing a shift method for a hybrid vehicle provided by an embodiment of the present disclosure is shown;

[0058] Figure 2 A structural diagram showing a shift device for a hybrid vehicle provided by an embodiment of the present disclosure is shown;

[0059] Figure 3 A structural diagram showing a vehicle provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0060] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0061] Hybrid vehicles not only focus on the efficiency of the power system in design, but also put efforts into the controllability. Among them, the series mode is a major highlight. Through precise gear shifting, this mode enables the vehicle to achieve a smooth and orderly transition in various driving environments, thus meeting the personalized needs of different drivers.

[0062] In the series mode, the vehicle is equipped with a series of carefully designed gears, which cover a variety of scenarios in daily driving. For example, the ECO / Normal mode is suitable for daily commuting, which can maximize fuel economy while ensuring power output; for light snow road conditions, the vehicle is also specially designed with a corresponding light snow mode to ensure stable driving on complex road conditions; in addition, the 4L mode is suitable for off-road or muddy roads, providing stronger traction.

[0063] The series neutral positions in each mode, such as N23, N3R, N1R, etc., are carefully designed. Among them, the ECO / Normal mode corresponds to N2R, the light snow mode corresponds to N3R, and the 4L mode corresponds to N1R. The selection of these specific gears is aimed at ensuring that the vehicle can start from the initial gear that is most suitable for the current driving environment when starting, so as to achieve the best power output and smooth driving experience.

[0064] When the driver needs to switch from one mode to another, the system will perform gear shifting step by step according to the preset order. This process is aimed at ensuring that the vehicle always remains stable during the switching process and avoiding power fluctuations caused by improper gear shifting. If there is a large difference between the neutral position of the target gear and the neutral position of the current gear, then this switching process needs to be carried out step by step in order, and this step often takes a certain amount of time.

[0065] For this reason, the present application provides a flow schematic diagram of a shifting method for a hybrid vehicle, as Figure 1 shown, this process can be executed by a hybrid vehicle driven by a dual motor. Some input parameters or intermediate results in the process allow manual intervention and adjustment to help improve accuracy. Among them, the hybrid vehicle can include a vehicle control unit and a transmission control unit.

[0066] It should be noted that the present application is applicable to a dual-motor four-wheel drive hybrid architecture, and the series mode is defined as the operating state in which the rear motor is the main driving force source. When the vehicle is in this mode and a starting gear shifting request is triggered, the control system executes a specific strategy. The target gear shifting operation (i.e., "front axle gear engagement") is performed through the front axle transmission, and at the same time, the four-wheel drive coordination control module is activated. The innovation of this strategy lies in combining the single-motor driving characteristics of the traditional series mode with the torque distribution advantages of the four-wheel drive system. During the process of the front axle transmission completing gear engagement, the rear motor continuously provides the basic driving force, and the front axle motor dynamically intervenes according to the gear state, forming a starting mode that combines electronic four-wheel drive and mechanical transmission. This design not only retains the high-efficiency energy transfer characteristics of the series mode but also enhances the low-speed high-torque output ability through the front axle gear pre-engagement technology, ultimately achieving the dual technical effects of seamless power mode switching and optimized driving efficiency.

[0067] The method flow steps of the embodiments of the present application are as follows:

[0068] S101, when the hybrid vehicle is in the series mode, if the vehicle control unit receives a starting gear shifting request, reduce the power of the power system of the hybrid vehicle. The series mode includes multiple gears in a specified order, and the starting gear shifting request includes a target gear.

[0069] It should be noted that in a series - mode hybrid vehicle, when the vehicle control unit (VCU) receives a request for starting and shifting gears, a series of precise control measures should be taken to reduce the power output of the powertrain. The series mode usually involves a series of gears arranged in a specific order, and these gears together constitute the vehicle's transmission system. The starting and shifting request contains a target gear, which indicates the specific gear to which the vehicle needs to shift. The specific implementation of S101 is as follows:

[0070] Detect the starting and shifting request: The VCU needs to monitor the starting and shifting request from the driver in real - time, which is usually achieved through a pedal position sensor or a shift lever position sensor.

[0071] Confirm the target gear: The VCU should analyze the starting and shifting request to determine the target gear. This includes identifying the specific gear to which the request is to shift and the position of this gear in the series mode.

[0072] Powertrain degradation: After confirming the target gear, the VCU should instruct the powertrain to reduce the power output.

[0073] For the torque output of the engine, the reduction is achieved through the following methods:

[0074] 1. Adjust the fuel injection volume: Reduce the frequency and volume of fuel injection, thereby reducing the torque output of the engine.

[0075] 2. Adjust the ignition timing: Appropriately delay the ignition timing to reduce the explosive force of the engine, thereby reducing the torque.

[0076] 3. Limit the engine speed: By limiting the maximum speed, control the torque output of the engine to avoid unnecessary power waste.

[0077] For the torque output of the motor, the following methods can be taken:

[0078] 1. Adjust the motor controller parameters: Achieve precise control of the motor torque output by optimizing the parameter settings of the motor controller, such as current limit, voltage limit, etc.

[0079] 2. Optimize the motor drive algorithm: Adopt an advanced motor drive algorithm to adjust the torque output of the motor in real - time to ensure that while meeting the power demand, unnecessary torque output is reduced.

[0080] 3. Utilize the regenerative braking system: During braking, by recovering energy, reduce the torque demand on the motor, thereby reducing the torque output of the overall powertrain.

[0081] S102, if the power of the power system of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open.

[0082] It should be noted that to ensure that the power system output of the hybrid vehicle meets the preset threshold standard. The preset threshold can be set according to the performance of the power system and the usage requirements of the vehicle. The specific implementation plan is as follows:

[0083] Power torque monitoring: The torque outputs of the engine and the motor are monitored in real time through the power system sensors. These sensors should be able to accurately measure the torque values to ensure the accuracy and reliability of the data. The sensors can include torque sensors, speed sensors, battery status sensors, etc.

[0084] Torque value calibration: When the torque values of both the engine and the motor are close to zero, that is, the output torque of the power system is close to the balanced state, the clutch control unit can be activated at this time.

[0085] Clutch control unit activation: Once it is monitored that the torque values of both the engine and the motor are lower than the preset value at the same time, the preset value can be 0.5 N·m, the clutch control unit will receive a signal and start to execute a program to control the opening of the clutch.

[0086] Clutch opening: The transmission control unit (TCU, Transmission control unit) can make the clutch open smoothly through a solenoid valve or other control mechanisms. This process should ensure that the opening action of the clutch is smooth and without impact to protect the power system components.

[0087] S103, if the vehicle control unit determines that the clutch is in the open state, it sends a gear shift instruction to the transmission control unit, and the gear shift instruction is to switch to the target gear.

[0088] It should be noted that when the VCU confirms that the clutch is already in the open state, it will perform a series of operations to ensure the smooth operation of the vehicle. Specifically, the VCU will send a clear gear shift instruction to the TCU. The purpose of this instruction is to switch the current gear to the predetermined target gear. The specific implementation plan is as follows:

[0089] Status monitoring: The VCU first monitors the open state of the clutch in real time to ensure that the clutch has been fully disengaged for gear shifting.

[0090] Instruction generation: Once it is confirmed that the clutch is in the open state, the VCU will generate a gear shift instruction according to the driving requirements of the vehicle. This instruction will contain the target gear information for switching.

[0091] Instruction Sending: The VCU sends the gear shifting instruction to the TCU through a preset communication protocol. The instruction should contain sufficient information for the TCU to accurately understand and execute the instruction.

[0092] S104, the transmission control unit receives the gear shifting instruction, switches the current gear to the target gear, and switches to the corresponding starting gear based on the target gear.

[0093] It should be noted that after receiving the gear shifting instruction, the TCU will perform a series of internal processes. This process includes, but is not limited to, the identification of the current gear and the determination of the target gear. The TCU will switch the current gear from the existing state to the target gear specified by the user according to the received instruction. The specific implementation plan is as follows:

[0094] Receiving and Identifying the Instruction: The TCU receives the gear shifting instruction from the driver or the automatic control system through the vehicle's network system. The instruction contains information about the target gear.

[0095] Confirming the Current Gear: The TCU checks the gear in which the current vehicle is located. For example, the current gear is N3R in the light snow mode.

[0096] Switching the Gear: After confirming the current gear, the TCU switches the gear from the current state to the target gear according to the instruction. For example, the target gear is N1R in the 4L mode, that is, switches the gear from N3R in the light snow mode to N1R in the 4L mode.

[0097] Determining the Starting Gear: Once the gear shifting is completed, the TCU needs to determine the corresponding starting gear according to the target gear.

[0098] Executing the Starting Gear Switching: The TCU makes the vehicle smoothly switch to the determined starting gear by controlling the hydraulic or electronic system. During this process, the TCU will monitor the running state of the vehicle to ensure the safety and smoothness of the switching process.

[0099] After receiving the gear shifting instruction, the TCU identifies the current gear. After confirming the current gear, it switches the gear from the current state to the target gear according to the instruction. After the gear shifting is completed, it determines the corresponding starting gear according to the target gear.

[0100] It should be noted that in a hybrid vehicle, when the vehicle control unit receives a start-up shift request, it first reduces the power of the powertrain to ensure that the vehicle shifts gears in a safe state. Subsequently, when the power of the powertrain reaches a preset threshold, the transmission control unit activates the clutch. At this time, after the vehicle control unit confirms that the clutch is activated, it directly sends a gear shift command to the transmission control unit, rather than shifting gradually to the target gear. Since it directly shifts to the target gear, the process of gradually shifting through intermediate gears is omitted, thus significantly shortening the shift time. Among them, since the clutch is a key component connecting the engine and the transmission, its main function is to allow the engine and the transmission to be temporarily separated during gear shifting, thereby achieving smooth gear shifting. When the clutch is activated, the power of the engine can be cut off, enabling the transmission to adjust gears independently of the engine.

[0101] Optionally, the power of the powertrain of the hybrid vehicle includes the torque of the powertrain of the hybrid vehicle; during the process that the power of the powertrain of the hybrid vehicle meets the preset threshold, if the torque of the powertrain of the hybrid vehicle is less than the preset torque value, it is determined that the power of the powertrain meets the preset threshold. Among them, the preset torque value can be set based on the actual situation. For example, the preset torque value can be 3 N·m.

[0102] It should be noted that the VCU can internally store a preset torque parameter table and call the corresponding preset torque value according to the current driving mode (such as economy / sports mode). When the torque of the powertrain of the hybrid vehicle is lower than the preset torque value, it is determined that the power of the powertrain meets the preset threshold.

[0103] It should be noted that in a hybrid vehicle, the function of the clutch is to allow for smooth separation and engagement between the engine and the transmission. When the torque is less than the preset value, the output power of the engine is relatively low, which helps to reduce the impact between the engine and the transmission. When it is necessary to switch the power source (for example, from pure electric mode to hybrid mode), the lower torque output can ensure that the clutch is smoothly activated, avoiding damage to the transmission and providing a smoother driving experience.

[0104] Furthermore, the power of the powertrain of the hybrid vehicle includes the throttle pedal opening; during the process that the power of the powertrain of the hybrid vehicle meets the preset threshold, if the throttle pedal opening is less than the preset opening angle, it is determined that the power of the powertrain meets the preset threshold. Among them, the preset opening angle can be set based on the actual situation. For example, the preset torque value can be 1°.

[0105] Install two groups of angle sensors, namely the main and auxiliary sensors, on the accelerator pedal assembly to collect physical opening signals in real time. Automatically adjust the preset opening angle reference value according to the currently selected driving mode (economy / lite snow / 4L). A slope compensation mechanism can also be established to dynamically correct the threshold parameters through the vehicle tilt sensor. When the accelerator pedal opening is less than the preset opening angle, it is determined that the power of the power system meets the preset threshold.

[0106] It should be noted that by using the accelerator pedal opening as the determination condition for the power system, when it is detected that the driver actively reduces the pedal opening (below the preset angle), the system can synchronously predict the attenuation trend of power demand. This mechanism changes the trigger point of the clutch disengagement action from the traditional "passive response after the power output weakens" to "the collaborative response of driving intention and power control", so that the clutch disengagement preparation starts at the stage when the actual output torque of the engine has not completely decreased. The resulting technical advantages are: by using the instant feedback of the driver's operation intention, coordinating the dynamic matching of the engine and the transmission in advance, and reducing the mechanical impact energy of the power system during the power source switch or mode conversion, which not only protects the mechanical structures of the clutch and the transmission, but also makes the power connection process actively synchronized with the driver's expected operation, ultimately achieving a seamless mode switching experience and prolonging the service life of the key components of the transmission system.

[0107] Optionally, the power of the power system of the hybrid vehicle includes the first torque of the engine of the hybrid vehicle and the second torque of the motor; when reducing the power of the power system of the hybrid vehicle, the first torque can be reduced to a first preset value; the second torque is reduced to a second preset value, and both the first preset value and the second preset value can be set based on the actual situation. For example, the first preset value is 2 N·m and the second preset value is 3 N·m.

[0108] It should be noted that in a hybrid vehicle, the role of the clutch is to connect or disconnect the power transmission between the engine and the transmission. When both the first torque (engine torque) and the second torque (motor torque) are reduced to the preset values, the output power of the engine and the motor decreases, which helps to reduce the power impact when the clutch is opened. According to Newton's second law (F = ma), a smaller force means a smaller acceleration change, thus reducing the vibration and noise when the clutch is opened and improving the ride comfort.

[0109] Optionally, when switching to the corresponding starting gear based on the target gear, the transmission control unit requests the motor speed to reach the target speed corresponding to the target gear, controls the clutch to be filled with oil, and closes the clutch; the vehicle control unit determines the target crankshaft speed corresponding to the target gear, and performs proportional-integral torque adjustment through torque distribution to increase or decrease the engine speed to the target crankshaft speed.

[0110] It should be noted that regarding the above content, the following specific implementation solutions can be adopted:

[0111] First, the transmission control unit will send an instruction to the motor according to the current vehicle driving condition, requiring it to increase the rotational speed to the target rotational speed corresponding to the target gear. During this process, the vehicle control unit will monitor the actual rotational speed of the motor to ensure that it matches the target rotational speed.

[0112] Meanwhile, in order to achieve a smooth shifting experience, the transmission control unit will control the clutch to perform an oil filling operation to prepare for the closing of the clutch. The oil filling process needs to be precisely controlled to ensure that the clutch can exert the best performance at the moment of closing.

[0113] After the clutch is filled with oil and closed, the vehicle control unit will determine the corresponding target crankshaft rotational speed according to the target gear. This step is the core of the entire shifting process because the crankshaft rotational speed directly affects the torque output of the engine.

[0114] To reach the target crankshaft rotational speed, the vehicle control unit will adopt a torque distribution strategy and precisely control the rotational speed of the engine through a proportional-integral torque adjustment algorithm. Specifically, when the target crankshaft rotational speed is higher than the current rotational speed, the vehicle control unit will increase the engine torque to raise the rotational speed; conversely, it will reduce the engine torque to lower the rotational speed.

[0115] It should be noted that when the vehicle starts from a stationary state, the transmission control unit requests the motor rotational speed to reach the target rotational speed corresponding to the target gear and controls the clutch to perform oil filling and closing. This process ensures that the motor can provide sufficient auxiliary torque when starting and work together with the engine, thus improving the starting efficiency. According to the power formula (P = Tw, where P is power, T is torque, and w is angular velocity), the coordinated work of the motor and the engine can provide a greater total torque to accelerate the starting process. The vehicle control unit determines the target crankshaft rotational speed corresponding to the target gear and performs proportional-integral torque adjustment through torque distribution to increase or decrease the engine rotational speed. This precise rotational speed control helps to smooth the rotational speed change of the engine and reduce the impact feeling during starting. According to the principles of dynamics, a smooth rotational speed change can reduce the impact on the vehicle and passengers.

[0116] Optionally, before reducing the power of the power system of the hybrid vehicle, if it is determined that the target gear is not adjacent to the current gear, execute the operation of reducing the power of the power system of the hybrid vehicle.

[0117] It should be noted that in the series mode of a hybrid vehicle, gear shifting is a complex process, and the core lies in ensuring the smoothness and efficiency of power output. When performing gear shifting, the power output of the power system is not directly reduced in all cases. Instead, the system will first make a judgment to determine the relationship between the target gear and the current gear. The specific implementation plan is as follows:

[0118] The system first analyzes whether the target gear is adjacent to the current gear. If the two are adjacent, the system will not perform a direct power reduction operation. When the target gear is adjacent to the current gear, the system will achieve a smooth transition of the power system by fine-tuning the power output. This transition does not require a significant reduction in power because the power demand change between adjacent gears is small, and a direct power reduction may be unnecessary, thus optimizing the power output and avoiding energy waste. If the target gear is not adjacent to the current gear, the system will perform a power reduction operation on the power system. In this case, directly reducing the power can reduce the power shock caused by gear skipping. During non-adjacent gear shifts, the power demand may change significantly. Directly reducing the power helps buffer this change and reduces the impact on the vehicle and passengers, ensuring driving smoothness and comfort. Once the system confirms that the target gear is not adjacent to the current gear, the system will immediately perform a power reduction operation on the power system. This step needs to be completed quickly and precisely to ensure a smooth power switch.

[0119] It should be noted that in the gear shifting of a hybrid vehicle in series mode, not all cases adopt a direct reduction of the power of the power system. Instead, it is determined whether to perform a power reduction operation by judging whether the target gear is adjacent to the current gear. When the target gear is adjacent to the current gear, the power of the power system can be more smoothly transitioned because the power output does not need to be significantly reduced, and a direct power reduction may be unnecessary, thus optimizing the power output and avoiding unnecessary energy waste. When the target gear is not adjacent to the current gear, directly reducing the power of the power system can reduce the power shock caused by gear skipping. This is because during non-adjacent gear shifts, the power demand may change significantly, and directly reducing the power helps buffer this change and reduces the impact on the vehicle and passengers.

[0120] Optionally, before reducing the power of the power system of the hybrid vehicle, determine the number of gears separated between the target gear and the current gear; if it is determined that the number of gears is higher than a preset value, perform the operation of reducing the power of the power system of the hybrid vehicle.

[0121] It should be noted that regarding the above content, the following specific implementation plan can be adopted:

[0122] Monitor the current gear of the vehicle in real time. Determine the target gear, which is the next gear determined by the driver's intention or system calculation. Calculate the gear difference between the target gear and the current gear. According to the characteristics of the vehicle and the driving conditions, set a reasonable preset quantity value. This value should be determined based on the performance of the vehicle's power system, energy consumption, and the driver's driving habits. If the calculated number of gears is less than or equal to the preset quantity value, the system will maintain the current power output and not perform the power reduction operation. Dynamically adjust the preset quantity value according to the vehicle's operating data and driver feedback to adapt to different driving conditions and environments.

[0123] It should be noted that when the number of gears between the target gear and the current gear is small, the power of the power system may not need to be significantly reduced because the change in power demand between gears is not large. By setting a preset quantity value, power reduction is only performed when the number of separated gears exceeds this value, which can avoid unnecessary power reduction and thus save energy. When the number of separated gears is large, it means that the power of the power system needs to change significantly to adapt to the new gear. In this case, reducing the power of the power system in advance allows the power system more time to adapt to this change, thereby optimizing the power response and reducing the impact and delay during gear shifting.

[0124] In P / N (Park / Neutral), in modes such as ECO / Normal, there is a series neutral position at N23, in the light snow mode, there is a series neutral position at N3R, and in the 4L mode, there is a series neutral position at N1R; when currently switching from other modes to the 4L / light snow mode, the series neutral position does not go to N1R / N3R, and the neutral position continues to stay at the neutral position of the original mode, which will cause a long gear shifting process when starting in the 4L / light snow mode. Similarly, when switching from the 4L / light snow mode to other modes, there is also a long starting gear shifting problem.

[0125] The problem solved by this technical solution: When shifting from P / N to D / R (Drive / Reverse), the front axle can quickly engage the gear, reducing the gear shifting time and achieving a quick start.

[0126] For vehicles equipped with a sequential shift transmission, different driving modes correspond to different neutral positions. When the driver shifts the gear lever from P / N to D / R, the front axle can quickly engage the gear to achieve a quick start for four-wheel drive.

[0127] When the actual mode is series, the target mode is series, and the actual gear is N3R / N23, if the driving mode is switched to 4L:

[0128] 1. The VCU requests the target gear to be N1R and controls the engine and front motor torque to drop to about 0 Nm;

[0129] 2. When the TCU determines that the absolute values of the actual torques of the engine and the front motor are lower than a certain threshold, the TCU controls the clutch to open quickly.

[0130] 3. After the VCU determines that the clutch is open, it sends the gearshift permission to the TCU.

[0131] 4. After receiving the gearshift permission from the VCU, the TCU controls the actual gear to switch from N3R / N23 to N1R.

[0132] 5. After the TCU requests that the speed of the front motor reaches the target speed, it controls the clutch to fill with oil and closes the clutch.

[0133] 6. After the clutch is closed, the VCU calculates the target crankshaft speed in the series mode and performs PI (Proportional-Integral) torque adjustment through torque distribution to increase / decrease the engine speed to the target crankshaft speed.

[0134] When the actual mode is series, the target mode is series, the actual gear is N23 / N1R, and the driving mode is switched to light snow, the VCU requests the target gear to be N3R, and the gearshift process is the same as above.

[0135] When the actual mode is series, the target mode is series, the actual gear is N3R / N1R, and the driving mode is not 4L and light snow, the VCU requests the target gear to be N23, and the gearshift process is the same as above.

[0136] Highlights and effects of this technical solution: It can reduce the gearshift time and achieve a quick start of the whole vehicle.

[0137] Corresponding to the above solution, this application provides a structural schematic diagram of a gearshift device for a hybrid vehicle, as Figure 2 shown, for a hybrid vehicle with dual-motor drive. The hybrid vehicle includes a vehicle control unit and a transmission control unit. The device includes: a power reduction unit 201, a clutch opening unit 202, a command sending unit 203, and a gearshift unit 204.

[0138] The power reduction unit 201, when the hybrid vehicle is in the series mode, if the vehicle control unit receives a starting gearshift request, reduces the power of the power system of the hybrid vehicle. The series mode includes multiple gears in a specified order, and the starting gearshift request includes a target gear.

[0139] The clutch opening unit 202, if the power of the power system of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open.

[0140] An instruction sending unit 203, if the vehicle control unit determines that the clutch is in an open state, sends a gear shifting instruction to the transmission control unit, and the gear shifting instruction is to shift to the target gear;

[0141] A gear shifting unit 204, the transmission control unit receives the gear shifting instruction, switches the current gear to the target gear, and switches to the corresponding starting gear based on the target gear.

[0142] Corresponding to the above solution, the present application provides a shifting device for a hybrid vehicle, which is used for a hybrid vehicle driven by two motors. The hybrid vehicle includes a vehicle control unit and a transmission control unit, and includes:

[0143] At least one processor; and,

[0144] A memory communicatively connected to the at least one processor; wherein,

[0145] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can:

[0146] When the hybrid vehicle is in a series mode, if the vehicle control unit receives a starting gear shifting request, reduce the power of the power system of the hybrid vehicle. The series mode includes a plurality of gears in a specified order, and the starting gear shifting request includes a target gear;

[0147] If the power of the power system of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open;

[0148] If the vehicle control unit determines that the clutch is in an open state, send a gear shifting instruction to the transmission control unit, and the gear shifting instruction is to shift to the target gear;

[0149] The transmission control unit receives the gear shifting instruction, switches the current gear to the target gear, and switches to the corresponding starting gear based on the target gear.

[0150] Corresponding to the above solution, the present application provides a non-volatile computer storage medium, which is used for a hybrid vehicle driven by two motors. The hybrid vehicle includes a vehicle control unit and a transmission control unit, and stores computer-executable instructions. When the computer-executable instructions are executed by a computer, they can implement:

[0151] When the hybrid vehicle is in series mode, if the vehicle control unit receives a start shift request, the power of the power system of the hybrid vehicle is reduced. The series mode includes multiple gears in a specified order, and the start shift request includes a target gear.

[0152] If the power of the power system of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open.

[0153] If the vehicle control unit determines that the clutch is in the open state, a gear shift command is sent to the transmission control unit. The gear shift command is to switch to the target gear.

[0154] The transmission control unit receives the gear shift command, switches the current gear to the target gear, and switches to the corresponding start gear based on the target gear.

[0155] Corresponding to the above solution, Figure 3 FIG. is a schematic structural diagram of a vehicle provided by an embodiment of the present disclosure. The vehicle includes: a memory 301 and a processor 302. Among them, an executable program code 3011 is stored in the memory 301, and the processor 302 is used to adjust and execute the executable program code 3011 to execute a shift method for a hybrid vehicle.

[0156] In this embodiment, the vehicle can be divided into functional modules according to the above method example. For example, it can correspond to each functional module, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is illustrative, only a logical function division, and there may be other division methods in actual implementation.

[0157] This embodiment also provides a computer-readable storage medium. Computer program code is stored in the computer-readable storage medium (including but not limited to disk memory, CD-ROM, optical memory, etc.). When the computer program code runs on a computer, the computer is caused to execute the above-related method steps to implement a voice model adjustment method for a supplier cloud provided by the above embodiment.

[0158] This embodiment also provides a computer program product. When the computer program product runs on a computer, the computer is caused to execute the above-related steps to implement the voice model adjustment method for a supplier cloud provided by the above embodiment.

[0159] Among them, the beneficial effects of the above embodiment can refer to the beneficial effects in the corresponding method provided above, which will not be elaborated here.

[0160] From the description of the above embodiments, those skilled in the art can understand that for the convenience and brevity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0161] In the embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0162] In the description of the present disclosure, it should be understood that if terms such as "upper", "lower", "front", "rear", "left" and "right" are used to indicate the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present disclosure.

[0163] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, commodity or device including the element.

[0164] The above are only the embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the scope of the claims of the present disclosure.

Claims

1. A shifting method for a hybrid vehicle, characterized in that, For a hybrid vehicle, the hybrid vehicle includes a vehicle control unit and a transmission control unit, and the method includes: When the hybrid vehicle is in series mode, if the vehicle control unit receives a starting gearshift request, reduce the power of the power system of the hybrid vehicle. The series mode includes multiple gears in a specified order, and the starting gearshift request includes a target gear; If the power of the power system of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open; If the vehicle control unit determines that the clutch is in the open state, send a gearshift command to the transmission control unit, and the gearshift command is to switch to the target gear; The transmission control unit receives the gearshift command, switches the current gear to the target gear, and switches to the corresponding starting gear based on the target gear.

2. The method according to claim 1, characterized in that The power of the power system of the hybrid vehicle includes the torque of the power system of the hybrid vehicle; The "if the power of the power system of the hybrid vehicle meets a preset threshold" includes: If the torque of the power system of the hybrid vehicle is less than a preset torque value, it is determined that the power of the power system meets the preset threshold.

3. The method according to claim 1, wherein The power of the power system of the hybrid vehicle includes the throttle pedal opening; The "if the power of the power system of the hybrid vehicle meets a preset threshold" includes: If the throttle pedal opening is less than a preset opening angle, it is determined that the power of the power system meets the preset threshold.

4. The method according to claim 2, wherein The power of the power system of the hybrid vehicle includes the first torque of the engine of the hybrid vehicle and the second torque of the motor; The "reduce the power of the power system of the hybrid vehicle" includes: Reduce the first torque to a first preset value; Reduce the second torque to a second preset value.

5. The method according to claim 1, wherein The "switch to the corresponding starting gear based on the target gear" includes: The transmission control unit requests the motor speed to reach the target speed corresponding to the target gear, controls the clutch to be filled with oil, and closes the clutch; The vehicle control unit determines the target crankshaft speed corresponding to the target gear, and performs proportional-integral torque adjustment through torque distribution to increase or decrease the engine speed to the target crankshaft speed.

6. The method according to claim 1, characterized in that, Before reducing the power of the power system of the hybrid vehicle, the method further includes: If it is determined that the target gear is not adjacent to the current gear, perform reducing the power of the power system of the hybrid vehicle.

7. The method according to claim 1, characterized in that, Before reducing the power of the power system of the hybrid vehicle, the method further includes: Determine the number of gears separated between the target gear and the current gear; If it is determined that the number of gears is higher than a preset number value, perform reducing the power of the power system of the hybrid vehicle.

8. A shift device for a hybrid vehicle, characterized in that, For a hybrid vehicle, the hybrid vehicle includes a vehicle control unit and a transmission control unit, 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, and the instructions are executed by the at least one processor to enable the at least one processor to: When the hybrid vehicle is in series mode, if the vehicle control unit receives a start gearshift request, reduce the power of the powertrain of the hybrid vehicle, the series mode includes a plurality of gears in a specified order, and the start gearshift request includes a target gear; If the power of the powertrain of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open; If the vehicle control unit determines that the clutch is in an open state, send a gearshift instruction to the transmission control unit, and the gearshift instruction is to switch to the target gear; The transmission control unit receives the gearshift instruction, switches the current gear to the target gear, and switches to the corresponding starting gear based on the target gear.

9. A non-volatile computer storage medium, characterized in that, A hybrid vehicle, the hybrid vehicle includes a vehicle control unit and a transmission control unit, and stores computer-executable instructions, and when the computer-executable instructions are executed by a computer, they can implement: When the hybrid vehicle is in series mode, if the vehicle control unit receives a start gearshift request, reduce the power of the powertrain of the hybrid vehicle, the series mode includes a plurality of gears in a specified order, and the start gearshift request includes a target gear; If the power of the powertrain of the hybrid vehicle meets a preset threshold, the transmission control unit controls the clutch to open; If the vehicle control unit determines that the clutch is in an open state, send a gearshift instruction to the transmission control unit, and the gearshift instruction is to switch to the target gear; The transmission control unit receives the gearshift instruction, switches the current gear to the target gear, and switches to the corresponding starting gear based on the target gear.

10. A vehicle, characterized in that, Including the gearshift of the hybrid vehicle according to any one of claims 1 to 7.

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