Shift control method, device and storage medium of hybrid vehicle

Abstract

This application provides a shift control method, device, and storage medium for hybrid vehicles. The method includes: when the target hybrid vehicle is in hybrid mode, after the HCU receives a shift request, the HCU controls the vehicle to perform a torque clearing operation; after the torque clearing is completed, the AMT is controlled to shift to neutral; by adjusting the engine torque and motor torque in real time to adjust the real-time synchronous speed, and when the real-time synchronous speed reaches the target synchronous speed, the AMT is controlled to perform a gear engagement operation to shift to the target gear; after the gear engagement operation is completed, the motor torque is adjusted to reach the target motor torque, and the shift process is confirmed to be complete. This solution replaces the engine torque clearing and returning with the motor torque change, improving torque response rate, reducing shift time, and improving overall vehicle power, while reducing engine transient response and reducing engine transient smoke during shifting.

Description

Technical Field

[0001] This application relates to the field of hybrid system shifting technology, and more specifically, to a shifting control method, device and storage medium for a hybrid vehicle. Background Technology

[0002] Parallel hybrid systems add an electric drive system (i.e., an electric motor and a power battery) to a traditional car. Both the engine and the electric motor can drive the wheels independently or work simultaneously to drive the car. When the power battery is low on power, the engine can also drive the electric motor to charge the battery.

[0003] When the parallel hybrid system is running in hybrid mode, the engine needs to clear torque and then restore torque when shifting gears. During the restoration of torque, the engine intake volume increases slowly, which limits the increase in fuel injection volume, resulting in a slow torque loading rate, a long shift time, and poor overall vehicle power. The engine also produces a lot of smoke during the shifting process. Summary of the Invention

[0004] The main objective of this application is to provide a shift control method, device, storage medium, and vehicle hybrid system for hybrid vehicles, so as to at least solve the problem of long shift time during the shifting process of hybrid vehicles in hybrid mode.

[0005] To achieve the above objectives, according to one aspect of this application, a shift control method for a hybrid vehicle is provided, comprising: after a target hybrid vehicle is in hybrid mode and its hybrid power control unit (HCU) receives a shift request, the HCU controls the target hybrid vehicle to perform a torque clearing operation, the torque clearing operation including controlling the motor to output negative torque so that the torque of the automatic manual transmission (AMT) returns to zero to complete the torque clearing, wherein the negative torque is related to the current positive torque of the engine; after controlling the target hybrid vehicle to complete the torque clearing, the HCU controls the AMT to shift to neutral; after shifting the gear to neutral, through actual... The engine torque and motor torque are adjusted to adjust the real-time synchronous speed. When the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference, the AMT is controlled to perform a gear shifting operation to adjust the gear to the target gear. The real-time synchronous speed is either the engine real-time speed or the motor real-time speed, and the engine real-time speed and the motor real-time speed are equal throughout the entire gear shifting control process. After the gear shifting operation is completed, the motor torque is further adjusted, and when the difference between the motor real-time torque and the motor target torque is less than a preset torque difference, it is determined that the target hybrid vehicle has completed the gear shift in the hybrid mode.

[0006] Optionally, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque, which is related to the current positive torque of the engine, so that the torque of the mechanical automatic transmission (AMT) is reduced to 0 to complete the torque clearing. This includes: adjusting the motor torque setpoint to a negative torque corresponding to the current positive torque of the engine; determining whether the deviation between the real-time motor torque and the motor torque setpoint is less than a second preset difference; and if the deviation between the real-time motor torque and the motor torque setpoint is less than the second preset difference, determining that the torque of the mechanical automatic transmission (AMT) is 0, and the torque clearing operation is completed.

[0007] Optionally, in the process of adjusting the real-time synchronous speed by adjusting the engine torque and motor torque in real time, the method further includes: performing an adjustment step: dynamically adjusting the engine torque to the engine target torque, and dynamically adjusting the motor torque to the motor speed regulating torque, so as to dynamically adjust the real-time synchronous speed, wherein the absolute value of the motor speed regulating torque is greater than the absolute value of the engine target torque; and in the process of performing the adjustment step, determining in real time whether the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a third preset difference; if the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than the third preset difference, adjusting the motor torque to a negative torque corresponding to the engine target torque; wherein the third preset difference is greater than the first preset difference.

[0008] Optionally, after the hybrid power control unit (HCU) of the target hybrid vehicle receives the shift request, and before the HCU controls the target hybrid vehicle to perform a torque clearing operation, the method further includes: acquiring the current vehicle speed, current accelerator pedal opening, current gear ratio, and current rear axle ratio of the target hybrid vehicle under the current operating conditions; determining the target gear based on the current vehicle speed of the target hybrid vehicle; determining the target motor torque and target engine torque based on the current accelerator pedal opening of the target hybrid vehicle; and determining the target synchronous speed based on the current vehicle speed, current gear ratio, and current rear axle ratio of the target hybrid vehicle.

[0009] Optionally, determining the target gear based on the current speed of the target hybrid vehicle includes: constructing a MAP table between the current speed of the target hybrid vehicle and the target gear; and determining the target gear corresponding to the current speed based on the MAP table.

[0010] Optionally, the method further includes: when controlling the motor to output the negative torque, the HCU controls the motor to charge the power battery of the target hybrid vehicle.

[0011] Optionally, the method further includes: during the shift control of the target hybrid vehicle, the clutch is always in an engaged state, wherein the engaged state is that the clutch is connected to the drive shaft.

[0012] According to another aspect of this application, a shift control device for a hybrid vehicle is provided, comprising: a control unit, configured to, after a target hybrid vehicle is in hybrid mode and its hybrid power control unit (HCU) receives a shift request, control the target hybrid vehicle to perform a torque clearing operation, the torque clearing operation including controlling the motor to output negative torque so that the torque of the automatic manual transmission (AMT) is reduced to 0 to complete the torque clearing, wherein the negative torque is related to the current positive torque of the engine; a first adjustment unit, configured to, after controlling the target hybrid vehicle to complete the torque clearing, control the AMT to shift to neutral; and a second adjustment unit, configured to, after shifting the gear to neutral... Then, by adjusting the engine torque and motor torque in real time to adjust the real-time synchronous speed, and when the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference, the AMT is controlled to perform a gear shifting operation to adjust the gear to the target gear. The real-time synchronous speed is either the engine real-time speed or the motor real-time speed, and the engine real-time speed and the motor real-time speed are equal throughout the entire gear shifting control process. A determining unit is used to continue adjusting the motor torque after the gear shifting operation is completed, and to determine that the target hybrid vehicle has completed gear shifting in the hybrid mode when the difference between the motor real-time torque and the motor target torque is less than a preset torque difference.

[0013] According to another aspect of this application, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform any of the aforementioned hybrid vehicle shift control methods.

[0014] According to another aspect of this application, a hybrid vehicle is provided, comprising: a hybrid power control unit (HCU) for executing a shift control method of any of the hybrid vehicles described herein; an engine electrically connected to the HCU; an electric motor electrically connected to the HCU; and a control mechanical automatic transmission (AMT) electrically connected to the HCU.

[0015] Applying the technical solution of this application, after the hybrid vehicle's hybrid control unit (HCU) receives a shift request, it controls the motor to complete a torque clearing operation, causing the torque of the automatic manual transmission (AMT) to return to zero. Then, the HCU controls the AMT to shift to neutral, adjusting the engine torque to the target torque. By changing the motor torque twice to reach the target synchronous speed, the HCU controls the AMT to shift to the target gear. Then, it continues to adjust the motor torque. When the motor torque reaches the target torque, the target hybrid vehicle completes the shift in hybrid mode. This solution replaces the engine's torque clearing and returning with the change in motor torque, improving torque response rate, reducing shift time, and enhancing overall vehicle power. Simultaneously, it reduces engine transient response and decreases engine transient smoke during shifting. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 A schematic diagram of a parallel hybrid system for a hybrid vehicle according to an embodiment of this application is shown;

[0018] Figure 2 A hardware structure block diagram of a mobile terminal for performing a shift control method for a hybrid vehicle, according to an embodiment of this application, is shown.

[0019] Figure 3 A schematic flowchart of a shift control method for a hybrid vehicle according to an embodiment of this application is shown.

[0020] Figure 4 A schematic diagram of a gear shifting process in hybrid mode for a hybrid vehicle according to an embodiment of this application is shown.

[0021] Figure 5 A schematic diagram of a gear shifting control process in hybrid mode for a hybrid vehicle according to an embodiment of this application is shown.

[0022] Figure 6 The diagram illustrates the changes in engine operating conditions during gear shifting in a hybrid vehicle in hybrid mode according to an embodiment of this application, and the changes in engine operating conditions during gear shifting in an existing solution.

[0023] Figure 7 A structural block diagram of a shift control device for a hybrid vehicle provided according to an embodiment of this application is shown.

[0024] Among them, the above Figure 1 Includes the following reference numerals:

[0025] 10. Hybrid Power Control Unit (HCU); 20. Engine; 30. Motor; 40. Automatic Manual Transmission (AMT); 50. Clutch; 60. ECU; 70. Motor Controller (MCU); 80. TCU; 90. Electric Power Steering Pump; 100. DC / AC; 110. Battery Management System (BMS); 120. Instrument Panel; 130. Shift Panel. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application 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 for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover 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.

[0029] For ease of description, the following explains some of the nouns or terms used in the embodiments of this application:

[0030] Parallel hybrid system: An electric drive system (i.e., an electric motor and a power battery) is added to the basis of a traditional car. The engine and the motor can drive the wheels independently or work simultaneously to drive the car. When the power battery is low on power, the engine can also drive the motor to charge the battery.

[0031] Hybrid mode: The engine and electric motor work together to drive the vehicle, where the output torque of the electric motor can be positive, 0, or negative.

[0032] AMT: Mechanical Automatic Transmission.

[0033] Torque clearing: Clears the torque on the input shaft of the torque transmission, making the torque on the input shaft of the transmission zero.

[0034] Torque increase: The torque on the gearbox input shaft is increased to the required value, which is achieved jointly by the electric motor and the engine.

[0035] As described in the background section, in the prior art, the shifting time of hybrid vehicles in hybrid mode is relatively long. In order to solve the problem of long shifting time of hybrid vehicles in hybrid mode, the embodiments of this application provide a shifting control method, device, storage medium and vehicle hybrid system for hybrid vehicles.

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0037] This application provides a hybrid system, such as... Figure 1 As shown, it includes: a hybrid power controller HCU10 for executing any of the gear shift control methods of the hybrid vehicle described above; an engine 20 electrically connected to the hybrid power controller HCU10; an electric motor 30 electrically connected to the hybrid power controller HCU10; and a control mechanical automatic transmission AMT40 electrically connected to the hybrid power controller HCU10.

[0038] It also includes: clutch 50; ECU 60; motor controller MCU 70; TCU 80; electric power steering pump 90; DC / AC 100; power battery BMS 110; instrument panel 120; shift panel 130. Specific connection methods and relationships are as follows... Figure 1 As shown.

[0039] The methods and embodiments provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, Figure 2 This is a hardware structure block diagram of a mobile terminal for a gear shift control method for a hybrid vehicle according to an embodiment of the present invention. Figure 2 As shown, a mobile terminal may include one or more ( Figure 2 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 2 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 2 The more or fewer components shown, or having the same Figure 2 The different configurations shown.

[0040] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the gear shift control method for a hybrid vehicle in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 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 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0041] This embodiment provides a shift control method for a hybrid vehicle that runs on a mobile terminal, computer terminal, or similar computing device. 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. Also, although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than that shown here.

[0042] Figure 3 This is a flowchart of a gear shifting control method for a hybrid vehicle according to an embodiment of this application. Figure 3 As shown, the method includes the following steps:

[0043] Step S301: When the target hybrid vehicle is in hybrid mode and the hybrid power controller HCU of the target hybrid vehicle receives a shift request, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque so that the torque of the mechanical automatic transmission AMT returns to 0 to complete the torque clearing. The negative torque is related to the current positive torque of the engine.

[0044] Among them, the gear shifting demand includes upshifting demand and downshifting demand;

[0045] Specifically, the torque clearing operation mainly uses the motor to output negative torque, so that the torque of the mechanical automatic transmission (AMT) returns to zero.

[0046] Step S302: After the target hybrid vehicle completes torque clearing, the HCU controls the AMT to adjust the gear to neutral.

[0047] Step S303: After shifting the gear to neutral, the real-time synchronous speed is adjusted by adjusting the engine torque and motor torque in real time. When the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference, the AMT is controlled to perform a gear shifting operation to shift the gear to the target gear. The real-time synchronous speed is the real-time speed of the engine or the real-time speed of the motor, and the real-time speed of the engine and the real-time speed of the motor are equal throughout the entire shift control process.

[0048] The clutch is always engaged, ensuring that the engine's real-time speed equals the motor's real-time speed.

[0049] Step S304: After completing the gear shifting operation, continue to adjust the motor torque, and determine that the target hybrid vehicle has completed the gear shift in hybrid mode if the difference between the real-time motor torque and the target motor torque is less than the preset torque difference.

[0050] Specifically, after the gear shifting operation is completed, the motor torque is adjusted to change the negative torque output by the motor to the target torque, which is a positive torque.

[0051] In this embodiment, after the hybrid vehicle's hybrid control unit (HCU) receives a shift request, it controls the electric motor to perform a torque clearing operation, causing the torque of the automatic manual transmission (AMT) to return to zero. Then, the HCU controls the AMT to shift to neutral, adjusting the engine torque to the target torque. By altering the motor torque twice to reach the target synchronous speed, the HCU controls the AMT to shift to the target gear. The motor torque is then continuously adjusted until it reaches the target torque, at which point the hybrid vehicle completes the shift in hybrid mode. This solution replaces the engine's torque clearing and return with the change in motor torque, improving torque response rate, reducing shift time, and enhancing overall vehicle power. Simultaneously, it reduces engine transient response and decreases transient engine smoke during shifting.

[0052] In the specific implementation process, in step S301 above, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque, which is related to the current positive torque of the engine, so that the torque of the mechanical automatic transmission (AMT) is reduced to 0 to complete the torque clearing. Specifically, the motor torque setting value is adjusted to a negative torque corresponding to the current positive torque of the engine; it is determined whether the deviation between the real-time torque of the motor and the motor torque setting value is less than a second preset difference; if the deviation between the real-time torque of the motor and the motor torque setting value is less than the second preset difference, the torque of the mechanical automatic transmission (AMT) is determined to be 0, and the torque clearing operation is completed.

[0053] This method achieves zeroing the transmission torque by outputting negative torque corresponding to the engine torque from the motor. During this process, the engine torque and speed remain unchanged; only the motor torque needs to be changed. This solves the problem of bumps and vibrations caused by changes in engine torque. Maintaining constant engine torque during this process helps improve fuel efficiency and allows for more effective fuel utilization.

[0054] In step S303 of this application, which adjusts the real-time synchronous speed by adjusting the engine torque and motor torque in real time, the process further includes: performing an adjustment step: dynamically adjusting the engine torque to the engine target torque and dynamically adjusting the motor torque to the motor speed regulating torque to dynamically adjust the real-time synchronous speed, wherein the absolute value of the motor speed regulating torque is greater than the absolute value of the engine target torque; and during the execution of the adjustment step, determining in real time whether the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a third preset difference; if the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than the third preset difference, adjusting the motor torque to a negative torque corresponding to the engine target torque; wherein the third preset difference is greater than the first preset difference.

[0055] This method adjusts the engine torque to the target torque and the motor torque to the speed-regulating torque, allowing for rapid change of the real-time synchronous speed to the target synchronous speed. When the difference between the real-time synchronous speed and the target synchronous speed approaches a third preset value, the speed-regulating torque output by the motor is adjusted to the negative torque corresponding to the engine's target torque. When the difference between the real-time synchronous speed and the target synchronous speed approaches a first preset value, it indicates that both the engine torque and the real-time synchronous speed have reached the target synchronous speed, allowing for gear engagement. Thus, the speed regulation operation of the entire system can be completed simply by changing the magnitude of the negative torque output by the motor.

[0056] Specifically, after the hybrid power control unit (HCU) of the target hybrid vehicle receives a shift request, and before the HCU controls the target hybrid vehicle to perform a torque clearing operation, the method further includes: acquiring the current vehicle speed, current accelerator pedal opening, current gear ratio, and current rear axle ratio of the target hybrid vehicle under the current operating conditions; determining the target gear based on the current vehicle speed of the target hybrid vehicle; determining the target motor torque and target engine torque based on the current accelerator pedal opening of the target hybrid vehicle; and determining the target synchronous speed based on the current vehicle speed, current gear ratio, and current rear axle ratio of the target hybrid vehicle.

[0057] This method obtains the target gear based on the current vehicle speed; it obtains the target torque based on the accelerator pedal opening, where the target torque includes the target torque of the motor and the target torque of the engine, and the target torque is equal to the sum of the target torque of the motor and the target torque of the engine; then it determines the target synchronous speed ratio, i.e., the target engine speed or the target motor speed, based on the current vehicle speed, the current gear ratio, and the current rear axle ratio.

[0058] More specifically, determining the target gear based on the current speed of the target hybrid vehicle includes: constructing a MAP table between the current speed of the target hybrid vehicle and the target gear; and determining the target gear corresponding to the current speed based on the MAP table.

[0059] This method, by constructing a speed-gear map (MAP), helps drivers better understand the speed range of the vehicle in different gears, thereby improving their control over vehicle performance and driving skills. Such a MAP allows for more accurate gear selection, improving fuel economy and driving comfort. Simultaneously, this MAP can also help vehicle manufacturers better design and tune vehicle transmission systems to meet the demands of different driving conditions. In short, constructing a speed-gear map can effectively enhance vehicle performance and the driving experience.

[0060] In addition, determining the target torque of the electric motor and the target torque of the engine based on the current accelerator pedal opening of the target hybrid vehicle includes:

[0061] Construct a MAP table relating the current accelerator pedal opening to the target torque of the electric motor and the target torque of the engine;

[0062] Based on the MAP table showing the relationship between the current accelerator pedal opening and the target torque of the motor and the engine, determine the target torque of the motor and the target torque of the engine corresponding to the current accelerator pedal opening.

[0063] In addition, the target synchronous speed is determined based on the target hybrid vehicle's current speed, current gear ratio, and current rear axle ratio, including:

[0064] Construct a MAP table relating the current vehicle speed, current gear ratio, and current rear axle speed to the target synchronous speed;

[0065] Based on the MAP table relating the current vehicle speed, current gear ratio, and current rear axle speed to the target synchronous speed, determine the target synchronous speed corresponding to the current vehicle speed, current gear ratio, and current rear axle speed.

[0066] Furthermore, the method also includes: while controlling the motor to output the negative torque, the HCU controls the motor to charge the power battery of the target hybrid vehicle.

[0067] This method works by changing the motor's torque to negative torque during gear shifts. At this point, the motor acts as a generator, converting kinetic energy into electrical energy which is stored in the battery, thus charging the hybrid vehicle. This energy recovery system can improve fuel economy and reduce energy waste.

[0068] The negative torque output by the electric motor can also reduce shift shock: The negative torque provides additional braking force during gear shifts, thus reducing the jolt. It improves smoothness: The negative torque helps smooth shifts, reducing the bumpy feeling and improving driving smoothness and comfort. It protects the drivetrain: The negative torque reduces the shock and stress during gear shifts, helping to reduce wear and damage to the drivetrain and extend its lifespan. In summary, the negative torque output by the electric motor plays a role in damping, smoothing, and protecting the drivetrain during gear shifts in hybrid vehicles.

[0069] Furthermore, the method also includes: during the shift control of the target hybrid vehicle, the clutch is always in an engaged state, wherein the engaged state is that the clutch is connected to the drive shaft.

[0070] This method maintains clutch engagement, meaning the power transmission between the engine and electric motor is continuous. During gear shifts in hybrid vehicles, maintaining clutch engagement reduces vibration and power interruption, improving driving comfort and fuel economy. Furthermore, maintaining clutch engagement also enhances the vehicle's power response and acceleration performance.

[0071] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the gear shifting control method for hybrid vehicles of this application will be described in detail below with reference to specific embodiments.

[0072] This embodiment relates to a specific shift control method for a hybrid vehicle, such as... Figure 4 The gear shifting process of the hybrid vehicle in hybrid mode, as shown, includes the following steps:

[0073] When the target hybrid vehicle is in hybrid mode and the HCU requires gear shifting, the HCU determines the target gear N and the target engine torque T based on the current operating conditions. E Target torque T of the motor M The target speed n of the engine and motor; the shift control process is as follows: Figure 5 As shown, the following steps are the specific gear shifting control process:

[0074] (1) Before shifting gears, the engine torque is T. E0 The motor torque is T M0 The engine and motor speeds are n0.

[0075] (2) When entering the torque clearing stage, the gear position, engine torque setting value, and engine and motor speeds remain unchanged, and the motor setting torque T is set. Mdes Change to -T E0 The actual torque T of the motor Mact With the set torque T Mdes (i.e. -T) E0 If the deviation is less than ΔT1, the torque clearing is considered complete, the required gear is changed to neutral, and the gear disengagement operation is performed.

[0076] (3) After the actual gear is shifted to neutral, the speed adjustment stage begins, and the engine torque is set to T. E The engine and motor speeds are set to n, and the motor torque is set to -T. E +ΔT2, where ΔT2 is for adjusting the engine speed. When the deviation between the actual motor and engine speeds and the set speed n is less than Δn1, the required motor torque becomes -T. E When the deviation between the actual speed of the motor and the engine and the set speed n continues to decrease to less than Δn2 (where |Δn2| < |Δn1|), the speed adjustment is considered to be completed. After the speed adjustment is completed, the gear is set to N and the gear shifting action is performed.

[0077] (4) After shifting gears, the torque return phase begins, and the motor is set to a torque of T. M The actual torque of the motor and the set torque T of the motor M If the deviation is less than ΔT3, the shifting process is considered complete. The entire shifting process is finished.

[0078] The specific embodiment describes the entire gear shifting process, and compares the engine operating condition changes during the gear shifting process of this scheme with those of existing schemes. Figure 6 As shown, this solution replaces the torque clearing and torque return of the engine by changing the torque of the motor, thereby improving the torque response rate.

[0079] This application also provides a shift control device for a hybrid vehicle. It should be noted that the shift control device for a hybrid vehicle in this application can be used to execute the shift control method for a hybrid vehicle provided in this application. This device is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0080] The following describes the gear shift control device for hybrid vehicles provided in the embodiments of this application.

[0081] Figure 7 This is a schematic diagram of a gear shift control device for a hybrid vehicle according to an embodiment of this application. Figure 7 As shown, the device includes:

[0082] The first control unit 71 is used to control the target hybrid vehicle to perform a torque clearing operation after the target hybrid vehicle is in hybrid mode and the hybrid power controller HCU of the target hybrid vehicle receives a shift request. The torque clearing operation includes controlling the motor to output negative torque so that the torque of the mechanical automatic transmission AMT returns to 0 to complete the torque clearing. The negative torque is related to the current positive torque of the engine.

[0083] The first adjustment unit 72 is used to control the AMT to adjust the gear to neutral after the target hybrid vehicle has completed torque clearing.

[0084] The second adjustment unit 73 is used to adjust the real-time synchronous speed by adjusting the engine torque and motor torque in real time after the gear is adjusted to neutral, and to control the AMT to perform a gear engagement operation to adjust the gear to the target gear when the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference. The real-time synchronous speed is the real-time speed of the engine or the real-time speed of the motor, and the real-time speed of the engine is equal to the real-time speed of the motor throughout the entire gear shift control process.

[0085] The first determining unit 74 is used to continue adjusting the motor torque after the gear shifting operation is completed, and to determine that the target hybrid vehicle has completed the gear shift in hybrid mode when the difference between the real-time motor torque and the target motor torque is less than a preset torque difference.

[0086] In this embodiment, after the hybrid vehicle's hybrid power controller (HCU) receives a shift request, the first control unit controls the motor to complete a torque clearing operation, causing the torque of the automatic manual transmission (AMT) to return to zero. The first adjustment unit (HCU) controls the AMT to shift to neutral. The second adjustment unit adjusts the engine torque to the target engine torque. By changing the motor torque twice to reach the target synchronous speed, the AMT is then controlled to shift to the target gear. The first determining unit continues to adjust the motor torque. When the motor torque reaches the target torque, the target hybrid vehicle completes the shift in hybrid mode. By changing the motor torque to replace the engine's torque clearing and return, the torque response rate is improved, shift time is reduced, and the overall vehicle power is enhanced. At the same time, the engine's transient response is reduced, fuel economy is improved, and the engine's transient smoke during the shift process is reduced.

[0087] As an optional solution, the control unit includes an adjustment module, a first determining module, and a second determining module;

[0088] The adjustment module is used to adjust the motor torque setting value to a negative torque corresponding to the current positive torque of the engine; the first determination module is used to determine whether the deviation between the real-time motor torque and the motor torque setting value is less than a second preset difference; the second determination module is used to determine that the torque of the mechanical automatic transmission AMT is 0 when the deviation between the real-time motor torque and the motor torque setting value is less than the second preset difference, and the torque clearing operation is completed.

[0089] Specifically, the device achieves the zeroing operation of the gearbox torque by outputting negative torque corresponding to the engine torque from the motor. During this process, the engine torque and speed remain unchanged, and only the motor torque needs to be changed. This reduces the problem of bumps and vibrations caused by changes in engine torque. Maintaining constant engine torque during this process helps improve fuel efficiency and allows for more effective use of fuel.

[0090] In one alternative, the second adjustment unit includes an execution adjustment module, a third determination module, and an adjustment module;

[0091] The execution adjustment module is used to perform the following adjustment steps during the process of adjusting the real-time synchronous speed by adjusting the engine torque and motor torque in real time: dynamically adjusting the engine torque to the engine target torque and dynamically adjusting the motor torque to the motor speed regulating torque, so as to dynamically adjust the real-time synchronous speed, wherein the absolute value of the motor speed regulating torque is greater than the absolute value of the engine target torque; the third determination module is used to determine in real time whether the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a third preset difference during the execution of the adjustment steps; the adjustment module is used to adjust the motor torque to a negative torque corresponding to the engine target torque when the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than the third preset difference; wherein the third preset difference is greater than the first preset difference.

[0092] Specifically, this device adjusts the engine torque to the target torque and the motor torque to the speed-regulating torque, enabling rapid changes in the real-time synchronous speed to the target synchronous speed. When the difference between the real-time synchronous speed and the target synchronous speed approaches a second preset value, the speed-regulating torque output by the motor is adjusted to the negative torque corresponding to the engine's target torque. When the difference between the real-time synchronous speed and the target synchronous speed approaches a first preset value, it indicates that both the engine torque and the real-time synchronous speed have reached the target synchronous speed, allowing for gear engagement. Thus, the speed regulation operation of the entire system can be completed simply by changing the magnitude of the negative torque output by the motor.

[0093] In one alternative embodiment, the apparatus further includes an acquisition unit, a second determination unit, a third determination unit, and a fourth determination unit;

[0094] The system comprises four units: an acquisition unit, a hybrid power control unit (HCU) for acquiring the target hybrid vehicle's current speed, current accelerator pedal opening, current gear ratio, and current rear axle ratio under the current operating conditions, after the target hybrid vehicle receives a shift request and before the HCU controls the target hybrid vehicle to perform a torque clearing operation; a second determination unit, a determination unit for determining the target gear based on the target hybrid vehicle's current speed; a third determination unit, a determination unit for determining the target motor torque and engine torque based on the target hybrid vehicle's current accelerator pedal opening; and a fourth determination unit, a determination unit for determining the target synchronous speed based on the target hybrid vehicle's current speed, current gear ratio, and current rear axle ratio.

[0095] Specifically, the device obtains the target gear based on the current vehicle speed; it obtains the target torque based on the accelerator pedal opening, where the target torque includes the target torque of the motor and the target torque of the engine, and the target torque is equal to the sum of the target torque of the motor and the target torque of the engine; and then determines the target synchronous speed ratio, i.e., the target engine speed or the target motor speed, based on the current vehicle speed, the current gear ratio, and the current rear axle ratio.

[0096] In one alternative approach, the second determining unit includes a construction module and a fourth determining module;

[0097] The first module is used to construct a MAP table between the current speed and the target gear of the target hybrid vehicle; the second module is used to determine the target gear corresponding to the current speed based on the MAP table.

[0098] Specifically, this method, by constructing a speed-gear map (MAP), can help drivers better understand the vehicle's speed range in different gears, thereby improving their control over vehicle performance and driving skills. Such a MAP allows for more accurate gear selection, improving fuel economy and driving comfort. Simultaneously, this MAP can also help vehicle manufacturers better design and tune their transmission systems to meet the demands of different driving conditions. In short, constructing a speed-gear map can effectively enhance vehicle performance and the driving experience.

[0099] In one alternative embodiment, the device further includes a second control unit;

[0100] The second control unit (HCU) is used to control the motor to charge the power battery of the target hybrid vehicle when the motor outputs negative torque.

[0101] Specifically, this device, by constructing a speed-to-gear map (MAP), helps drivers better understand the vehicle's speed range in different gears, thereby improving their control over vehicle performance and driving skills. Such a MAP allows for more accurate gear selection, improving fuel economy and driving comfort. Simultaneously, this MAP can also help vehicle manufacturers better design and tune their transmission systems to meet the demands of different driving conditions. In short, constructing a speed-to-gear map effectively enhances vehicle performance and the driving experience.

[0102] In an alternative embodiment, the device further includes a clutch that remains engaged during the gear shifting control of the target hybrid vehicle, wherein the engaged state means that the clutch is connected to the drive shaft.

[0103] Specifically, maintaining clutch engagement means that power transmission between the engine and the electric motor is continuous. In hybrid vehicles, maintaining clutch engagement during gear shifts reduces vibration and power interruption, improving driving comfort and fuel economy. Furthermore, maintaining clutch engagement can also enhance vehicle responsiveness and acceleration performance.

[0104] The shift control device of the hybrid vehicle includes a processor and a memory. The first control unit, the first adjustment unit, the second adjustment unit, etc., are all stored as program units in the memory, and the processor executes the program units stored in the memory to achieve the corresponding functions. All of the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0105] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and adjusting kernel parameters can address the issue of long shift times during gear changes in hybrid mode in hybrid vehicles.

[0106] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0107] This invention provides a computer-readable storage medium including a stored program, wherein the program, when running, controls the device where the computer-readable storage medium is located to execute the gear shifting control method of the hybrid vehicle.

[0108] Specifically, the shift control methods for hybrid vehicles include:

[0109] Step S301: When the target hybrid vehicle is in hybrid mode and the hybrid power controller HCU of the target hybrid vehicle receives a shift request, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque so that the torque of the mechanical automatic transmission AMT returns to 0 to complete the torque clearing. The negative torque is related to the current positive torque of the engine.

[0110] Step S302: After the target hybrid vehicle completes torque clearing, the HCU controls the AMT to adjust the gear to neutral.

[0111] Step S303: After shifting the gear to neutral, the real-time synchronous speed is adjusted by adjusting the engine torque and motor torque in real time. When the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference, the AMT is controlled to perform a gear shifting operation to shift the gear to the target gear. The real-time synchronous speed is the real-time speed of the engine or the real-time speed of the motor, and the real-time speed of the engine and the real-time speed of the motor are equal throughout the entire shift control process.

[0112] Step S304: After completing the gear shifting operation, continue to adjust the motor torque, and determine that the target hybrid vehicle has completed the gear shift in hybrid mode if the difference between the real-time motor torque and the target motor torque is less than the preset torque difference.

[0113] Optionally, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque, which is related to the current positive torque of the engine, so that the torque of the mechanical automatic transmission (AMT) is reduced to 0 to complete the torque clearing. This includes: adjusting the motor torque setpoint to a negative torque corresponding to the current positive torque of the engine; determining whether the deviation between the real-time motor torque and the motor torque setpoint is less than a second preset difference; and if the deviation between the real-time motor torque and the motor torque setpoint is less than the second preset difference, determining that the torque of the mechanical automatic transmission (AMT) is 0, and the torque clearing operation is completed.

[0114] Optionally, in the process of adjusting the real-time synchronous speed by adjusting the engine torque and motor torque in real time, the method further includes: performing an adjustment step: dynamically adjusting the engine torque to the engine target torque, and dynamically adjusting the motor torque to the motor speed regulating torque, so as to dynamically adjust the real-time synchronous speed, wherein the absolute value of the motor speed regulating torque is greater than the absolute value of the engine target torque; and in the process of performing the adjustment step, determining in real time whether the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a third preset difference; if the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than the third preset difference, adjusting the motor torque to a negative torque corresponding to the engine target torque; wherein the third preset difference is greater than a first preset difference.

[0115] Optionally, after the hybrid power control unit (HCU) of the target hybrid vehicle receives the shift request, and before the HCU controls the target hybrid vehicle to perform a torque clearing operation, the method further includes: acquiring the current vehicle speed, current accelerator pedal opening, current gear ratio, and current rear axle ratio of the target hybrid vehicle under the current operating conditions; determining the target gear based on the current vehicle speed; determining the target motor torque and engine torque based on the current accelerator pedal opening of the target hybrid vehicle; and determining the target synchronous speed based on the current vehicle speed, current gear ratio, and current rear axle ratio of the target hybrid vehicle.

[0116] Optionally, the target gear is determined based on the current speed of the target hybrid vehicle, including: constructing a MAP table between the current speed of the target hybrid vehicle and the target gear; and determining the target gear corresponding to the current speed based on the MAP table.

[0117] Optionally, the method further includes: under the condition that the motor outputs negative torque, the HCU controls the motor to charge the power battery of the target hybrid vehicle.

[0118] Optionally, the method further includes: during the shift control of the target hybrid vehicle, the clutch is always in an engaged state, wherein the engaged state means that the clutch is connected to the drive shaft.

[0119] This invention provides a processor for running a program, wherein the program executes a gear shifting control method for a hybrid vehicle.

[0120] Specifically, the shift control methods for hybrid vehicles include:

[0121] Step S301: When the target hybrid vehicle is in hybrid mode and the hybrid power controller HCU of the target hybrid vehicle receives a shift request, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque so that the torque of the mechanical automatic transmission AMT returns to 0 to complete the torque clearing. The negative torque is related to the current positive torque of the engine.

[0122] Step S302: After the target hybrid vehicle completes torque clearing, the HCU controls the AMT to adjust the gear to neutral.

[0123] Step S303: After shifting the gear to neutral, the real-time synchronous speed is adjusted by adjusting the engine torque and motor torque in real time. When the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference, the AMT is controlled to perform a gear shifting operation to shift the gear to the target gear. The real-time synchronous speed is the real-time speed of the engine or the real-time speed of the motor, and the real-time speed of the engine and the real-time speed of the motor are equal throughout the entire shift control process.

[0124] Step S304: After completing the gear shifting operation, continue to adjust the motor torque, and determine that the target hybrid vehicle has completed the gear shift in hybrid mode if the difference between the real-time motor torque and the target motor torque is less than the preset torque difference.

[0125] Optionally, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque, which is related to the current positive torque of the engine, so that the torque of the mechanical automatic transmission (AMT) is reduced to 0 to complete the torque clearing. This includes: adjusting the motor torque setpoint to a negative torque corresponding to the current positive torque of the engine; determining whether the deviation between the real-time motor torque and the motor torque setpoint is less than a second preset difference; and if the deviation between the real-time motor torque and the motor torque setpoint is less than the second preset difference, determining that the torque of the mechanical automatic transmission (AMT) is 0, and the torque clearing operation is completed.

[0126] Optionally, in the process of adjusting the real-time synchronous speed by adjusting the engine torque and motor torque in real time, the method further includes: performing an adjustment step: dynamically adjusting the engine torque to the engine target torque, and dynamically adjusting the motor torque to the motor speed regulating torque, so as to dynamically adjust the real-time synchronous speed, wherein the absolute value of the motor speed regulating torque is greater than the absolute value of the engine target torque; and in the process of performing the adjustment step, determining in real time whether the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a third preset difference; if the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than the third preset difference, adjusting the motor torque to a negative torque corresponding to the engine target torque; wherein the third preset difference is greater than a first preset difference.

[0127] Optionally, after the hybrid power control unit (HCU) of the target hybrid vehicle receives the shift request, and before the HCU controls the target hybrid vehicle to perform a torque clearing operation, the method further includes: acquiring the current vehicle speed, current accelerator pedal opening, current gear ratio, and current rear axle ratio of the target hybrid vehicle under the current operating conditions; determining the target gear based on the current vehicle speed; determining the target motor torque and engine torque based on the current accelerator pedal opening of the target hybrid vehicle; and determining the target synchronous speed based on the current vehicle speed, current gear ratio, and current rear axle ratio of the target hybrid vehicle.

[0128] Optionally, the target gear is determined based on the current speed of the target hybrid vehicle, including: constructing a MAP table between the current speed of the target hybrid vehicle and the target gear; and determining the target gear corresponding to the current speed based on the MAP table.

[0129] Optionally, the method further includes: under the condition that the motor outputs negative torque, the HCU controls the motor to charge the power battery of the target hybrid vehicle.

[0130] Optionally, the method further includes: during the shift control of the target hybrid vehicle, the clutch is always in an engaged state, wherein the engaged state means that the clutch is connected to the drive shaft.

[0131] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps:

[0132] Step S301: When the target hybrid vehicle is in hybrid mode and the hybrid power controller HCU of the target hybrid vehicle receives a shift request, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque so that the torque of the mechanical automatic transmission AMT returns to 0 to complete the torque clearing. The negative torque is related to the current positive torque of the engine.

[0133] Step S302: After the target hybrid vehicle completes torque clearing, the HCU controls the AMT to adjust the gear to neutral.

[0134] Step S303: After shifting the gear to neutral, the real-time synchronous speed is adjusted by adjusting the engine torque and motor torque in real time. When the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference, the AMT is controlled to perform a gear shifting operation to shift the gear to the target gear. The real-time synchronous speed is the real-time speed of the engine or the real-time speed of the motor, and the real-time speed of the engine and the real-time speed of the motor are equal throughout the entire shift control process.

[0135] Step S304: After completing the gear shifting operation, continue to adjust the motor torque, and determine that the target hybrid vehicle has completed the gear shift in hybrid mode if the difference between the real-time motor torque and the target motor torque is less than the preset torque difference.

[0136] The devices mentioned in this article can be servers, PCs, tablets, mobile phones, etc.

[0137] Optionally, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque, which is related to the current positive torque of the engine, so that the torque of the mechanical automatic transmission (AMT) is reduced to 0 to complete the torque clearing. This includes: adjusting the motor torque setpoint to a negative torque corresponding to the current positive torque of the engine; determining whether the deviation between the real-time motor torque and the motor torque setpoint is less than a second preset difference; and if the deviation between the real-time motor torque and the motor torque setpoint is less than the second preset difference, determining that the torque of the mechanical automatic transmission (AMT) is 0, and the torque clearing operation is completed.

[0138] Optionally, in the process of adjusting the real-time synchronous speed by adjusting the engine torque and motor torque in real time, the method further includes: performing an adjustment step: dynamically adjusting the engine torque to the engine target torque, and dynamically adjusting the motor torque to the motor speed regulating torque, so as to dynamically adjust the real-time synchronous speed, wherein the absolute value of the motor speed regulating torque is greater than the absolute value of the engine target torque; and in the process of performing the adjustment step, determining in real time whether the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a third preset difference; if the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than the third preset difference, adjusting the motor torque to a negative torque corresponding to the engine target torque; wherein the third preset difference is greater than a first preset difference.

[0139] Optionally, after the hybrid power control unit (HCU) of the target hybrid vehicle receives the shift request, and before the HCU controls the target hybrid vehicle to perform a torque clearing operation, the method further includes: acquiring the current vehicle speed, current accelerator pedal opening, current gear ratio, and current rear axle ratio of the target hybrid vehicle under the current operating conditions; determining the target gear based on the current vehicle speed; determining the target motor torque and engine torque based on the current accelerator pedal opening of the target hybrid vehicle; and determining the target synchronous speed based on the current vehicle speed, current gear ratio, and current rear axle ratio of the target hybrid vehicle.

[0140] Optionally, the target gear is determined based on the current speed of the target hybrid vehicle, including: constructing a MAP table between the current speed of the target hybrid vehicle and the target gear; and determining the target gear corresponding to the current speed based on the MAP table.

[0141] Optionally, the method further includes: under the condition that the motor outputs negative torque, the HCU controls the motor to charge the power battery of the target hybrid vehicle.

[0142] Optionally, the method further includes: during the shift control of the target hybrid vehicle, the clutch is always in an engaged state, wherein the engaged state means that the clutch is connected to the drive shaft.

[0143] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps:

[0144] Step S301: When the target hybrid vehicle is in hybrid mode and the hybrid power controller HCU of the target hybrid vehicle receives a shift request, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque so that the torque of the mechanical automatic transmission AMT returns to 0 to complete the torque clearing. The negative torque is related to the current positive torque of the engine.

[0145] Step S302: After the target hybrid vehicle completes torque clearing, the HCU controls the AMT to adjust the gear to neutral.

[0146] Step S303: After shifting the gear to neutral, the real-time synchronous speed is adjusted by adjusting the engine torque and motor torque in real time. When the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference, the AMT is controlled to perform a gear shifting operation to shift the gear to the target gear. The real-time synchronous speed is the real-time speed of the engine or the real-time speed of the motor, and the real-time speed of the engine and the real-time speed of the motor are equal throughout the entire shift control process.

[0147] Step S304: After completing the gear shifting operation, continue to adjust the motor torque, and determine that the target hybrid vehicle has completed the gear shift in hybrid mode if the difference between the real-time motor torque and the target motor torque is less than the preset torque difference.

[0148] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0149] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0150] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0151] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0152] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0153] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0154] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0155] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0156] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0157] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0158] 1) A shift control method for a hybrid vehicle according to this application includes: after the target hybrid vehicle is in hybrid mode and the hybrid power control unit (HCU) of the target hybrid vehicle receives a shift request, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque so that the torque of the automatic manual transmission (AMT) returns to 0 to complete the torque clearing, wherein the negative torque is related to the current positive torque of the engine; after controlling the target hybrid vehicle to complete the torque clearing, the HCU controls the AMT to shift to neutral; after shifting to neutral, the engine torque and... The motor torque is adjusted to the real-time synchronous speed. When the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference, the AMT is controlled to perform a gear engagement operation to adjust the gear to the target gear. The real-time synchronous speed is either the engine real-time speed or the motor real-time speed, and the engine real-time speed and the motor real-time speed are equal throughout the entire gear shift control process. After the gear engagement operation is completed, the motor torque continues to be adjusted, and when the difference between the motor real-time torque and the target motor torque is less than a preset torque difference, the target hybrid vehicle is confirmed to have completed the gear shift in hybrid mode. By replacing the engine's torque clearing and returning with the motor's torque variation, the torque response rate is improved, the shift time is reduced, and the overall vehicle power is enhanced. Simultaneously, the engine's transient response is reduced, and the engine's transient smoke during gear shifts is decreased.

[0159] 2) A shift control device for a hybrid vehicle according to this application includes: a control unit, used to control the target hybrid vehicle to perform a torque clearing operation after the target hybrid vehicle is in hybrid mode and the hybrid power controller (HCU) of the target hybrid vehicle receives a shift request. The torque clearing operation includes controlling the motor to output negative torque so that the torque of the automatic manual transmission (AMT) returns to 0 to complete the torque clearing, wherein the negative torque is related to the current positive torque of the engine; a first adjustment unit, used to control the AMT to adjust the gear to neutral after the target hybrid vehicle completes the torque clearing; and a second adjustment unit, used to adjust the gear to neutral after adjusting the gear to neutral by... The system adjusts the engine torque and motor torque to adjust the real-time synchronous speed. When the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference, the system controls the AMT to perform a gear engagement operation to adjust the gear to the target gear. The real-time synchronous speed is either the engine real-time speed or the motor real-time speed, and the engine real-time speed and motor real-time speed are equal throughout the entire gear shift control process. A determination unit is used to continue adjusting the motor torque after the gear engagement operation, and to determine that the target hybrid vehicle has completed the gear shift in hybrid mode when the difference between the motor real-time torque and the motor target torque is less than a preset torque difference. By replacing the engine's torque adjustment and return by the motor's torque variation, the torque response rate is improved, the shift time is reduced, and the overall vehicle power is improved. Simultaneously, the engine's transient response is reduced, and the engine's transient smoke during the gear shift process is decreased.

[0160] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A shift control method for a hybrid vehicle, characterized in that, include: When the target hybrid vehicle is in hybrid mode and the hybrid power control unit (HCU) of the target hybrid vehicle receives a shift request, the HCU controls the target hybrid vehicle to perform a torque clearing operation. The torque clearing operation includes controlling the motor to output negative torque so that the torque of the mechanical automatic transmission (AMT) returns to 0 to complete the torque clearing. The negative torque is related to the current positive torque of the engine. After controlling the target hybrid vehicle to complete the torque clearing, the HCU controls the AMT to adjust the gear to neutral. After the gear is adjusted to neutral, the engine torque and motor torque are adjusted in real time to adjust the real-time synchronous speed. If the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference, the AMT is controlled to perform a gear engagement operation to adjust the gear to the target gear. The real-time synchronous speed is the engine real-time speed or the motor real-time speed, and the engine real-time speed is equal to the motor real-time speed throughout the entire gear shift control process. After completing the gear shifting operation, the motor torque is adjusted, and the target hybrid vehicle is determined to have completed the gear shift in the hybrid mode when the difference between the real-time motor torque and the target motor torque is less than a preset torque difference. The method further includes the following steps during the process of adjusting the real-time synchronous speed by adjusting the engine torque and motor torque in real time: performing an adjustment step: dynamically adjusting the engine torque to the engine target torque and dynamically adjusting the motor torque to the motor speed regulating torque to dynamically adjust the real-time synchronous speed, wherein the absolute value of the motor speed regulating torque is greater than the absolute value of the engine target torque; and during the execution of the adjustment step, determining in real time whether the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a third preset difference; if the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than the third preset difference, adjusting the motor torque to a negative torque corresponding to the engine target torque; wherein the third preset difference is greater than the first preset difference.

2. The method according to claim 1, characterized in that, The HCU controls the target hybrid vehicle to perform a torque clearing operation. This torque clearing operation includes controlling the motor to output negative torque, which is related to the engine's current positive torque, so that the torque of the automated manual transmission (AMT) returns to zero to complete the torque clearing process. This includes: Adjust the motor torque setting to a negative torque corresponding to the current positive torque of the engine; Determine whether the deviation between the real-time torque of the motor and the set value of the motor torque is less than a second preset difference; If the deviation between the real-time torque of the motor and the set torque value of the motor is less than the second preset difference, the torque of the mechanical automatic transmission (AMT) is determined to be 0, and the torque clearing operation is completed.

3. The method according to claim 1, characterized in that, After the hybrid power control unit (HCU) of the target hybrid vehicle receives a shift request, and before the HCU controls the target hybrid vehicle to perform a torque clearing operation, the method further includes: Obtain the current vehicle speed, current accelerator pedal opening, current gear ratio, and current rear axle ratio of the target hybrid vehicle under the current operating conditions; The target gear is determined based on the current speed of the target hybrid vehicle; The target torque of the electric motor and the target torque of the engine are determined based on the current accelerator pedal opening of the target hybrid vehicle. The target synchronous speed is determined based on the current vehicle speed, the current gear ratio, and the current rear axle ratio of the target hybrid vehicle.

4. The method according to claim 3, characterized in that, Determining the target gear based on the current speed of the target hybrid vehicle includes: Construct a MAP table relating the current vehicle speed and the target gear of the target hybrid vehicle; Based on the MAP table, determine the target gear corresponding to the current vehicle speed.

5. The method according to claim 1, characterized in that, The method further includes: When the motor is controlled to output the negative torque, the HCU controls the motor to charge the power battery of the target hybrid vehicle.

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: During the gear shifting control of the target hybrid vehicle, the clutch is always in an engaged state, wherein the engaged state means that the clutch is connected to the drive shaft.

7. A shift control device for a hybrid vehicle, characterized in that, include: A control unit is configured to, when the target hybrid vehicle is in hybrid mode and the hybrid power control unit (HCU) of the target hybrid vehicle receives a shift request, control the target hybrid vehicle to perform a torque clearing operation, the torque clearing operation including controlling the motor to output negative torque so that the torque of the mechanical automatic transmission (AMT) returns to 0 to complete the torque clearing, wherein the negative torque is related to the current positive torque of the engine; The first adjustment unit is used to control the AMT to adjust the gear to neutral after the target hybrid vehicle completes the torque clearing process. The second adjustment unit is used to adjust the real-time synchronous speed by adjusting the engine torque and motor torque in real time after the gear is adjusted to neutral, and to control the AMT to perform a gear engagement operation to adjust the gear to the target gear when the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a first preset difference. The real-time synchronous speed is the real-time engine speed or the real-time motor speed, and the real-time engine speed and the real-time motor speed are equal throughout the entire gear shift control process. The determining unit is used to continue adjusting the motor torque after the gear shifting operation is completed, and to determine that the target hybrid vehicle has completed the gear shift in the hybrid mode when the difference between the real-time motor torque and the target motor torque is less than a preset torque difference. The second adjustment unit includes an execution adjustment module, a third determination module, and an adjustment module. The execution adjustment module is used to perform the following adjustment steps during the process of adjusting the real-time synchronous speed by real-time adjustment of engine torque and motor torque: dynamically adjusting the engine torque to the engine target torque and dynamically adjusting the motor torque to the motor speed-regulating torque to dynamically adjust the real-time synchronous speed, wherein the absolute value of the motor speed-regulating torque is greater than the absolute value of the engine target torque. The third determination module is used to determine in real-time whether the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than a third preset difference during the execution of the adjustment steps. The adjustment module is used to adjust the motor torque to a negative torque corresponding to the engine target torque when the absolute value of the difference between the real-time synchronous speed and the target synchronous speed is less than the third preset difference; wherein the third preset difference is greater than a first preset difference.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the gear shifting control method for a hybrid vehicle as described in any one of claims 1 to 6.

9. A vehicle hybrid system, comprising: A hybrid power control unit (HCU) for executing the shift control method for a hybrid vehicle as described in any one of claims 1 to 6; The engine is electrically connected to the HCU; The motor is electrically connected to the HCU; The mechanical automatic transmission (AMT) is electrically connected to the HCU.

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