Vehicle working mode switching method, device, equipment and storage medium

Abstract

The application discloses a vehicle working mode switching method and device, equipment and a storage medium, and belongs to the technical field of vehicle control. The application detects the current working mode of a vehicle; when the current working mode is a hybrid series mode, the vehicle state of the vehicle is acquired; whether the vehicle meets the condition of switching to a hybrid parallel mode is judged according to the vehicle state; if yes, the motor and the engine of the vehicle are adjusted, so that the vehicle is switched from the hybrid series mode to the hybrid parallel mode. Through the switching judgment of the hybrid series mode and the hybrid parallel mode based on the vehicle state, the optimal economy of the hybrid mode can be ensured, and when the mode is switched, the motor and the engine of the vehicle are adjusted, so that the torque switching of the hybrid mode is smoother and has no vibration, and the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a method, apparatus, device, and storage medium for switching vehicle operating modes. Background Technology

[0002] Hybrid electric vehicles (HEVs) have more complex drive systems than pure electric vehicles (EVs). Unlike EVs, which have only one drive motor, HEVs add a hybrid clutch, a generator, and an electric motor. These components need to be coordinated and controlled to drive the vehicle. When switching from pure electric mode to Hybrid 1 and Hybrid 2 modes, the engine, generator, clutch, and drive motor need to be coordinated and controlled. However, current control methods do not take into account the optimal economy of hybrid mode, and there is vibration during the hybrid mode switching process, which affects the user experience.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a method, apparatus, device, and storage medium for switching vehicle operating modes, aiming to solve the technical problems that the current control methods in the prior art do not take into account the optimal economy of hybrid mode, and that there is jitter during the switching process of hybrid mode, which affects the user experience.

[0005] To achieve the above objectives, the present invention provides a vehicle operating mode switching method, the vehicle operating mode switching method comprising the following steps:

[0006] Detect the vehicle's current operating mode;

[0007] When the current operating mode is hybrid series mode, the vehicle status of the vehicle is obtained;

[0008] Determine whether the vehicle meets the conditions for switching to hybrid parallel mode based on the vehicle status;

[0009] If the conditions are met, the vehicle's motor and engine are adjusted to switch the vehicle from hybrid series mode to hybrid parallel mode.

[0010] Optionally, the motor includes a generator, and the adjustment of the vehicle's motor and engine includes:

[0011] Determine the drive wheel speed and the required torque to drive the vehicle in hybrid parallel mode;

[0012] The generator speed is adjusted according to the drive wheel speed, and the engine torque is adjusted according to the torque required by the driving vehicle.

[0013] When the first switching condition is met, the torque of the generator is controlled so that the generator 5 is maintained at the current speed.

[0014] Optionally, the motor further includes a drive motor, and after controlling the torque of the generator to maintain the generator at the current speed when the first switching condition is met, the method further includes:

[0015] When the second switching condition is met, the torque of the generator is increased, the torque of the drive motor is decreased, and the torque of the engine is maintained.

[0016] 0. When the third switching condition is met, adjust the torque of the drive motor.

[0017] Optionally, the first switching condition includes the speed difference between the input and output ends of the clutch being less than or equal to a first preset difference and lasting for a duration exceeding a preset duration; the second switching condition includes the clutch being in an engaged state and the torque at the input end reaching a preset value; and the third switching condition includes the speed difference between the input and output ends of the clutch being less than or equal to a second preset difference and lasting for a duration exceeding a preset duration, wherein the first preset difference is less than the second preset difference.

[0018] Optionally, determining whether the vehicle meets the conditions for switching to hybrid parallel mode based on the vehicle status includes:

[0019] The power generation operating point is determined based on the vehicle status.

[0020] The vehicle is determined to be in high-speed cruising condition based on the power generation operating point; if yes, the vehicle is determined to meet the conditions for switching to hybrid parallel mode.

[0021] Optionally, determining the power generation operating point based on the vehicle status includes:

[0022] Determine the current battery level, target battery level, and drive power requirement based on the vehicle status;

[0023] The power generation demand is determined based on the current battery charge, the target battery charge, and the drive power demand.

[0024] 5. Find the power generation operating point from the power demand table based on the power generation demand.

[0025] Optionally, before obtaining the vehicle status when the current operating mode is hybrid series mode, the process includes:

[0026] When the current operating mode is pure electric mode, the current battery level and target battery level of the vehicle are obtained;

[0027] 0. Calculate the difference in battery power between the current battery power and the target battery power;

[0028] When the battery difference meets the hybrid switching conditions, the vehicle's current operating mode is adjusted to hybrid series mode, and the hybrid switching conditions are determined by the mode switching table.

[0029] Furthermore, to achieve the above objectives, the present invention also proposes a vehicle operating mode switching device, the vehicle operating mode switching device comprising:

[0030] The detection module is used to detect the vehicle's current operating mode;

[0031] The detection module is also used to obtain the vehicle status when the current working mode is hybrid series mode;

[0032] The judgment module is used to determine whether the vehicle meets the conditions for switching to hybrid parallel mode based on the vehicle status.

[0033] The control module is used to adjust the vehicle's motor and engine if the conditions are met, so that the vehicle switches from hybrid series mode to hybrid parallel mode.

[0034] In addition, to achieve the above objectives, the present invention also proposes a vehicle operating mode switching device, the vehicle operating mode switching device comprising: a memory, a processor, and a vehicle operating mode switching program stored in the memory and running on the processor, the vehicle operating mode switching program being configured to implement the vehicle operating mode switching method as described above.

[0035] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a vehicle operating mode switching program, wherein the vehicle operating mode switching program, when executed by a processor, implements the vehicle operating mode switching method as described above.

[0036] This invention detects the vehicle's current operating mode; when the current operating mode is hybrid series mode, it acquires the vehicle's state; based on the vehicle state, it determines whether the vehicle meets the conditions for switching to hybrid parallel mode; if so, it adjusts the vehicle's motor and engine to switch the vehicle from hybrid series mode to hybrid parallel mode. By determining the switching between hybrid series and hybrid parallel modes based on the vehicle state, the optimal economy of the hybrid mode can be guaranteed. Furthermore, by adjusting the vehicle's motor and engine during mode switching, the torque switching in the hybrid mode becomes smoother and less jittery, improving the user experience. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a vehicle operating mode switching device in the hardware operating environment involved in the embodiments of the present invention;

[0038] Figure 2 This is a flowchart illustrating the first embodiment of the vehicle operating mode switching method of the present invention;

[0039] Figure 3 This is a schematic diagram of the classification of working modes in one embodiment of the vehicle working mode switching method of the present invention;

[0040] Figure 4 This is a graph showing different battery levels in one embodiment of the vehicle operating mode switching method of the present invention.

[0041] Figure 5 This is a flowchart illustrating the second embodiment of the vehicle operating mode switching method of the present invention;

[0042] Figure 6 This is a flowchart illustrating the third embodiment of the vehicle operating mode switching method of the present invention;

[0043] Figure 7 This is a schematic representation of mode switching in one embodiment of the vehicle operating mode switching method of the present invention;

[0044] Figure 8 This is a schematic representation of the power generation demand in one embodiment of the vehicle operating mode switching method of the present invention;

[0045] Figure 9 This is a schematic diagram illustrating the combined working efficiency of the engine and generator in one embodiment of the vehicle operating mode switching method of the present invention;

[0046] Figure 10 This is a structural block diagram of the first embodiment of the vehicle operating mode switching device of the present invention.

[0047] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0049] Reference Figure 1 , Figure 1 This is a schematic diagram of the vehicle operating mode switching device structure in the hardware operating environment involved in the embodiments of the present invention.

[0050] like Figure 1As shown, the vehicle operating mode switching device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0051] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the vehicle operating mode switching device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0052] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a vehicle operating mode switching program.

[0053] exist Figure 1 In the vehicle operating mode switching device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the vehicle operating mode switching device of the present invention can be set in the vehicle operating mode switching device, and the vehicle operating mode switching device calls the vehicle operating mode switching program stored in the memory 1005 through the processor 1001 and executes the vehicle operating mode switching method provided in the embodiment of the present invention.

[0054] This invention provides a method for switching vehicle operating modes, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of a vehicle operating mode switching method according to the present invention.

[0055] In this embodiment, the vehicle operating mode switching method includes the following steps:

[0056] Step S10: Detect the vehicle's current operating mode.

[0057] In this embodiment, the executing entity can be the vehicle operating mode switching device, which has functions such as data processing, data communication, and program execution. The vehicle operating mode switching device can be a terminal device such as a computer. Of course, other devices with similar functions can also be used, and this embodiment does not limit this. For ease of explanation, this embodiment uses a vehicle operating mode switching device as an example.

[0058] It's important to note that hybrid electric vehicles (HEVs) have more complex drive systems than pure electric vehicles (EVs). While EVs have only one drive motor, HEVs add a hybrid clutch, generator, and electric motor. These components require coordinated control to drive the vehicle. When switching from pure electric mode to Hybrid 1 or Hybrid 2 mode, coordinated control of the engine, generator, clutch, and drive motor is necessary. Taking a specific vehicle model as an example, currently, when calculating the vehicle's drive torque, the drive torque calculation unit calculates the driver's required torque based on the throttle opening (APO) and current vehicle speed. Then, the torque limiting unit limits the driver's required torque using the maximum capacity of the battery and motor, and limits the slope of the change in required torque, outputting a command torque. Finally, the torque output command unit sends the command torque to the motor controller for execution. However, this current control method does not consider the optimal economy of hybrid mode, and there is jitter during hybrid mode switching, affecting the user experience.

[0059] In this embodiment, to solve the above-mentioned technical problems, the vehicle controller coordinates the drive motor, generator, engine and clutch, ensuring optimal economy and smooth power connection before and after drive mode switching.

[0060] In this embodiment, five operating modes are proposed to meet the user's driving needs. These five modes are as follows: Figure 3 As shown, Figure 3The five modes shown are OEV, DEV, SEV, DHEV, and OHEV. In this embodiment, the hybrid vehicle uses dual motors, such as motor P2 and motor P3. OEV and DEV modes are equivalent to pure electric modes, where the engine is off or idling. Specifically, in OEV mode, motor P2 is off, and motor P3 is in driving mode to propel the vehicle. In DEV mode, both motors P2 and P3 are in driving mode, simultaneously driving the vehicle. SEV, DHEV, and OHEV modes are hybrid modes. Specifically, SEV mode is a series hybrid mode, where the engine drives generator P2 to generate electricity, and motor P3 drives the vehicle. DHEV and OHEV modes are parallel hybrid modes. In DHEV mode, the engine, along with motors P2 and P3, jointly drive the vehicle. In OHEV mode, the engine drives motor P2 to generate electricity while simultaneously driving motor P3 to propel the vehicle. In this embodiment, when controlling the vehicle to switch operating modes, it is necessary to detect the vehicle's current operating mode in real time. The above five operating modes are illustrative examples. In actual situations, the vehicle's operating modes can be divided accordingly based on the actual vehicle type and control requirements. This embodiment does not impose any restrictions on this. It should be emphasized that regardless of the operating mode, it ultimately manifests as different combinations of battery pack power consumption, power maintenance, and power replenishment phases. Furthermore, pure electric power is prioritized during the power consumption phase, and fuel power is prioritized during the power maintenance phase. Figure 4 The graph shown.

[0061] Step S20: When the current working mode is hybrid series mode, obtain the vehicle status of the vehicle.

[0062] Step S30: Determine whether the vehicle meets the conditions for switching to hybrid parallel mode based on the vehicle status.

[0063] In practical implementation, in series hybrid mode, the engine never participates in driving the vehicle; it only powers the generator to provide electricity to the electric motor. The difference between series and parallel hybrid mode is that both the engine and electric motor work together to drive the vehicle. Compared to series hybrid mode, parallel hybrid mode can provide greater driving force, but this results in increased fuel consumption. Switching between hybrid modes affects the vehicle's fuel economy. In this embodiment, the vehicle status is acquired before switching, and the system determines whether a hybrid mode switch is necessary, i.e., whether the vehicle meets the conditions for switching from series hybrid mode to parallel hybrid mode.

[0064] Furthermore, the vehicle status in this embodiment includes, but is not limited to, the vehicle's battery pack status, the road gradient, altitude, and ambient temperature. Based on the above information, it can be determined whether the vehicle needs to be switched to hybrid parallel mode.

[0065] Step S40: If satisfied, adjust the vehicle's motor and engine to switch the vehicle from hybrid series mode to hybrid parallel mode.

[0066] In practice, if the conditions are met, it means that the vehicle needs to be switched from hybrid series mode to hybrid parallel mode. Furthermore, by judging the vehicle status as described above, the power needs of the user can be met while ensuring the economy of the hybrid mode.

[0067] Furthermore, after determining that the conditions for switching from hybrid series mode to hybrid parallel mode are met, this embodiment adjusts the vehicle's motor and engine during the switch to ensure smooth torque switching and prevent vibration during the transition. Specifically, this embodiment can adjust the vehicle's motor speed, for example, by adjusting the generator speed to match the wheel speed. It can also adjust the engine torque from the generator torque to the torque required to drive the vehicle. Of course, this embodiment can also select other methods to adjust the vehicle's motor and engine according to actual control requirements; this embodiment does not impose any limitations on this approach.

[0068] This embodiment detects the vehicle's current operating mode; when the current operating mode is hybrid series mode, it acquires the vehicle's status; based on the vehicle status, it determines whether the vehicle meets the conditions for switching to hybrid parallel mode; if so, it adjusts the vehicle's motor and engine to switch the vehicle from hybrid series mode to hybrid parallel mode. By determining the switching between hybrid series and hybrid parallel modes based on the vehicle status, the optimal economy of the hybrid mode can be guaranteed. At the same time, when switching modes, the adjustment of the vehicle's motor and engine makes the torque switching in the hybrid mode smoother and without vibration, improving the user experience.

[0069] refer to Figure 5 , Figure 5 This is a flowchart illustrating a second embodiment of a vehicle operating mode switching method according to the present invention.

[0070] Based on the first embodiment described above, in the vehicle operating mode switching method of this embodiment, step S40 specifically includes:

[0071] Step S401: Determine the drive wheel speed and the required torque for driving the vehicle in hybrid parallel mode.

[0072] In this specific implementation, before switching to hybrid parallel mode, it is necessary to obtain the drive wheel speed and the required torque for driving the vehicle in hybrid parallel mode. Switching between series and parallel modes requires releasing the engine to the wheel ends. In hybrid series mode, the engine drives the generator to provide power to the electric motor. After switching to hybrid parallel mode, it is necessary to ensure that the generator speed is consistent with the wheel end speed. The drive wheel speed can be directly collected by sensors. The required torque for driving the vehicle can be determined by the required power for driving, which is then used to determine the required power generation speed and torque. For example, in hybrid parallel mode, when the engine power requirement is 22kW, the corresponding generator speed is 2000rpm and the torque is 100Nm.

[0073] Step S402: Adjust the speed of the generator according to the speed of the drive wheel, and adjust the torque of the engine according to the torque required by the driving vehicle.

[0074] In practice, after determining the speed of the drive wheels and the required torque for driving the vehicle, this embodiment can adjust the speed of the generator according to the speed of the drive wheels and adjust the torque of the engine according to the required torque for driving the vehicle, thereby ensuring the smoothness of the switching.

[0075] Step S403: When the first switching condition is met, the torque of the generator is controlled so that the generator is maintained at the current speed.

[0076] In this embodiment, the generator speed adjustment is a control of the generator in speed mode. When the first switching condition is met, the generator control in this embodiment is switched from speed regulation mode to torque mode. This allows for convenient and immediate power supply to the vehicle after coupling with the vehicle. In torque mode, the focus is on adjusting the generator torque. For example, a speed of 5000 rpm corresponds to a torque control of 20 Nm. The torque in torque mode is the torque that the generator uses to maintain its speed and feeds back to the vehicle controller. In torque mode, torque control can ensure that the generator maintains its current speed, which is the speed adjusted in speed regulation mode.

[0077] Furthermore, in this embodiment, when the second switching condition is met, the torque of the generator is further increased, the torque of the drive motor is reduced, and the torque of the engine is maintained. Finally, when the third switching condition is met, the torque of the drive motor is adjusted. That is, under steady-state conditions, by adjusting the torque of the drive motor, the engine operates in the economic range, and the fuel consumption when the engine provides power is the optimal fuel consumption.

[0078] It should be noted that the first switching condition in this embodiment includes the speed difference between the input and output ends of the clutch being less than or equal to a first preset difference value and lasting for a duration exceeding a preset duration. For example, the speed difference between the input and output ends of the clutch is less than or equal to 20 revolutions per minute and lasts for a duration of 100 ms. The second switching condition includes the clutch being in an engaged state and the torque at the input end reaching a preset value, for example, the torque at the input end being 0. The third switching condition includes the speed difference between the input and output ends of the clutch being less than or equal to a second preset difference value and lasting for a duration exceeding a preset duration. For example, the speed difference between the input and output ends of the clutch is less than or equal to 50 revolutions per minute and lasts for a duration of 100 ms. Here, the first preset difference value (i.e., the aforementioned 20 revolutions per minute) is less than the second preset difference value (i.e., the aforementioned 50 revolutions per minute). The above preset difference value, preset duration, and preset value settings are illustrative examples. The above preset values ​​can also be adjusted according to actual conditions, and this embodiment does not impose any restrictions on this.

[0079] This embodiment determines the drive wheel speed and the required torque for driving the vehicle in hybrid parallel mode; adjusts the generator speed based on the drive wheel speed, and adjusts the engine torque based on the required torque for driving the vehicle; when the speed difference between the input and output ends of the clutch is less than or equal to a first preset difference and lasts for more than a preset duration, the torque of the generator is controlled to maintain the generator at the current speed; when the clutch is engaged and the input torque reaches a preset value, the torque of the generator is increased, the torque of the drive motor is decreased, and the torque of the engine is maintained; when the speed difference between the input and output ends of the clutch is less than or equal to a second preset difference and lasts for more than a preset duration, the torque of the drive motor is adjusted. Through this method, the smoothness of hybrid mode switching is achieved.

[0080] refer to Figure 6 , Figure 6 This is a flowchart illustrating a third embodiment of a vehicle operating mode switching method according to the present invention.

[0081] Based on the first embodiment described above, in the vehicle operating mode switching method of this embodiment, step S30 specifically includes:

[0082] Step S301: Determine the power generation operating point based on the vehicle status.

[0083] It should be noted that in this embodiment, determining whether a vehicle meets the conditions for switching from hybrid series mode to hybrid parallel mode requires the use of the generator operating point. The generator operating point can be determined in the following way.

[0084] In this specific implementation, the current battery level, target battery level, and drive power requirement can be determined based on the vehicle status. Then, based on the difference between the current battery level and the target battery level, and combined with the drive power requirement, the power generation requirement is determined. Finally, the power generation operating point is found from the power demand table based on the power generation requirement. Figure 7 As shown, Figure 7 The start-up boundary corresponds to SOC_L, i.e., low battery charge, while the shutdown boundary corresponds to SOC_H, i.e., high battery charge. HEV is a hybrid parallel mode, according to... Figure 7 The diagram shows how to determine the driving power demand under different battery levels. Then, by combining the difference between the current battery level and the target battery level with the driving power demand, the power generation demand can be determined. Figure 8 As shown, ΔSOC represents the difference between the current battery capacity and the target battery capacity. This difference, combined with the power generation demand, allows us to determine the optimal power output. Figure 8 The power generation operating point can be found in the table shown.

[0085] Step S302: Determine whether the vehicle is in high-speed cruising condition based on the power generation operating point.

[0086] Step S303: If yes, then determine that the vehicle meets the conditions for switching to hybrid parallel mode.

[0087] It's important to note that at lower speeds and with lower torque demand, the vehicle primarily operates in EV mode, i.e., pure electric mode. When the battery level is high, the vehicle tends to operate in pure electric mode, while at lower battery levels, it tends to use a hybrid series generator. Furthermore, at higher speeds, such as 70-120 km / h, the driving force is not very strong, so directly driving the vehicle with the engine during high-speed cruising is more economical than first generating electricity with the engine and then using the electric motor to drive the vehicle. In this case, the vehicle enters a hybrid parallel mode. After determining the generator operating point, further consideration can be given to… Figure 9 As shown, the speed and torque corresponding to the power generation operating point are determined. For example, when the power generation demand is 34kW, the corresponding speed is 2800rpm and the torque is 115Nm, thereby determining whether the vehicle is in a high-speed cruising condition.

[0088] Furthermore, when the vehicle starts, it first enters pure electric mode. In pure electric mode, this embodiment obtains the vehicle's current battery level and the target battery level, calculates the difference between the current battery level and the target battery level, and determines whether to control the vehicle to switch from pure electric mode to hybrid series mode based on this difference. Figure 7As shown, when the difference between the current battery level and the target battery level is small or negative, it indicates that the battery level difference meets the conditions for hybrid switching, and the vehicle's current operating mode needs to be adjusted to hybrid series mode. Conversely, when the difference between the current battery level and the target battery level is small or positive, it indicates a higher battery level, in which case the vehicle prioritizes pure electric drive. Regarding... Figure 7 It should be further explained that when the driving power demand is constant, the larger the current battery level, the more priority is given to pure electric drive. Conversely, when the battery level is constant, the larger the driving power demand, the more priority is given to hybrid mode, which can supplement the power through the engine.

[0089] This embodiment determines the current battery level, target battery level, and driving power requirement based on the vehicle status; determines the power generation requirement based on the current battery level, target battery level, and driving power requirement; searches for the power generation operating point from the power demand table based on the power generation requirement; determines whether the vehicle is in high-speed cruising mode based on the power generation operating point; if so, it is determined that the vehicle meets the conditions for switching to hybrid parallel mode. By performing mode switching through the above logical judgment, the optimal economy of hybrid mode can be guaranteed.

[0090] Furthermore, this embodiment of the invention also proposes a storage medium storing a vehicle operating mode switching program, which, when executed by a processor, implements the steps of the vehicle operating mode switching method described above.

[0091] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0092] Reference Figure 10 , Figure 10 This is a structural block diagram of the first embodiment of the vehicle operating mode switching device of the present invention.

[0093] like Figure 10 As shown, the vehicle operating mode switching device proposed in this embodiment of the invention includes:

[0094] The detection module 10 is used to detect the current operating mode of the vehicle.

[0095] The detection module 10 is also used to obtain the vehicle status when the current working mode is hybrid series mode.

[0096] The judgment module 20 is used to determine whether the vehicle meets the conditions for switching to hybrid parallel mode based on the vehicle status.

[0097] The control module 30 is used to adjust the vehicle's motor and engine if the conditions are met, so that the vehicle switches from hybrid series mode to hybrid parallel mode.

[0098] This embodiment detects the vehicle's current operating mode; when the current operating mode is hybrid series mode, it acquires the vehicle's status; based on the vehicle status, it determines whether the vehicle meets the conditions for switching to hybrid parallel mode; if so, it adjusts the vehicle's motor and engine to switch the vehicle from hybrid series mode to hybrid parallel mode. By determining the switching between hybrid series and hybrid parallel modes based on the vehicle status, the optimal economy of the hybrid mode can be guaranteed. At the same time, when switching modes, the adjustment of the vehicle's motor and engine makes the torque switching in the hybrid mode smoother and without vibration, improving the user experience.

[0099] In one embodiment, the control module 30 is further configured to determine the drive wheel speed and the required torque for driving the vehicle in the hybrid parallel mode; adjust the generator speed according to the drive wheel speed and adjust the engine torque according to the required torque for driving the vehicle; and control the generator torque when a first switching condition is met so that the generator is maintained at the current speed.

[0100] In one embodiment, the control module 30 is further configured to increase the torque of the generator, decrease the torque of the drive motor, and maintain the torque of the engine when the second switching condition is met; and to adjust the torque of the drive motor when the third switching condition is met.

[0101] In one embodiment, the first switching condition includes the speed difference between the input and output ends of the clutch being less than or equal to a first preset difference and lasting for a duration exceeding a preset duration; the second switching condition includes the clutch being in an engaged state and the torque at the input end reaching a preset value; and the third switching condition includes the speed difference between the input and output ends of the clutch being less than or equal to a second preset difference and lasting for a duration exceeding a preset duration, wherein the first preset difference is less than the second preset difference.

[0102] In one embodiment, the judgment module 20 is further configured to determine the power generation operating point based on the vehicle status; determine whether the vehicle is in a high-speed cruising condition based on the power generation operating point; if so, determine that the vehicle meets the conditions for switching to hybrid parallel mode.

[0103] In one embodiment, the determination module 20 is further configured to determine the current battery charge, the target battery charge, and the driving power requirement based on the vehicle status; determine the power generation requirement based on the current battery charge, the target battery charge, and the driving power requirement; and find the power generation operating point from the power requirement table based on the power generation requirement.

[0104] In one embodiment, the control module 30 is further configured to, when the current operating mode is pure electric mode, acquire the current battery charge and target battery charge of the vehicle; calculate the charge difference between the current battery charge and the target battery charge; and when the charge difference meets the hybrid switching conditions, adjust the current operating mode of the vehicle to hybrid series mode, wherein the hybrid switching conditions are determined by a mode switching table.

[0105] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0106] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0107] In addition, for technical details not described in detail in this embodiment, please refer to the vehicle working mode switching method provided in any embodiment of the present invention, which will not be repeated here.

[0108] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. 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 system that includes that element.

[0109] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0110] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0111] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A vehicle operating mode switching method, characterized by, The vehicle operating mode switching method includes: Detect the vehicle's current operating mode; When the current operating mode is hybrid series mode, the vehicle status of the vehicle is obtained; Determine whether the vehicle meets the conditions for switching to hybrid parallel mode based on the vehicle status; If the conditions are met, the vehicle's motor and engine are adjusted to switch the vehicle from hybrid series mode to hybrid parallel mode. The motor includes a generator, and the adjustment of the vehicle's motor and engine includes: Determine the drive wheel speed and the required torque to drive the vehicle in hybrid parallel mode; The generator speed is adjusted according to the drive wheel speed, and the engine torque is adjusted according to the torque required by the driving vehicle. When the first switching condition is met, the torque of the generator is controlled to maintain the generator at the current speed. The motor further includes a drive motor. After controlling the torque of the generator to maintain the generator at the current speed when the first switching condition is met, the method further includes: When the second switching condition is met, the torque of the generator is increased, the torque of the drive motor is decreased, and the torque of the engine is maintained. When the third switching condition is met, adjust the torque of the drive motor.

2. The vehicle operating mode switching method according to claim 1, characterized by, The first switching condition includes the speed difference between the input and output ends of the clutch being less than or equal to a first preset difference and lasting for a duration exceeding a preset duration; the second switching condition includes the clutch being in an engaged state and the torque at the input end reaching a preset value; the third switching condition includes the speed difference between the input and output ends of the clutch being less than or equal to a second preset difference and lasting for a duration exceeding a preset duration, wherein the first preset difference is less than the second preset difference.

3. The vehicle operating mode switching method according to claim 1, characterized by, The step of determining whether the vehicle meets the conditions for switching to hybrid parallel mode based on the vehicle status includes: The power generation operating point is determined based on the vehicle status. Determine whether the vehicle is in high-speed cruising condition based on the power generation operating point; If so, the vehicle is determined to meet the conditions for switching to hybrid parallel mode.

4. The vehicle operating mode switching method according to claim 3, characterized by, Determining the power generation operating point based on the vehicle status includes: Determine the current battery level, target battery level, and drive power requirement based on the vehicle status; The power generation demand is determined based on the current battery charge, the target battery charge, and the drive power demand. The power generation operating point is located from the power demand table based on the power generation demand.

5. The vehicle operating mode switching method according to any one of claims 1 to 4, characterized by, Before obtaining the vehicle status when the current operating mode is hybrid series mode, the process includes: When the current operating mode is pure electric mode, the current battery level and target battery level of the vehicle are obtained; Calculate the difference in battery level between the current battery level and the target battery level; When the battery difference meets the hybrid switching conditions, the vehicle's current operating mode is adjusted to hybrid series mode, and the hybrid switching conditions are determined by the mode switching table.

6. A vehicle operating mode switching apparatus characterized by comprising: The vehicle operating mode switching device includes: The detection module is used to detect the vehicle's current operating mode; The detection module is also used to obtain the vehicle status when the current working mode is hybrid series mode; The judgment module is used to determine whether the vehicle meets the conditions for switching to hybrid parallel mode based on the vehicle status. The control module is used to adjust the vehicle's motor and engine if the conditions are met, so that the vehicle switches from hybrid series mode to hybrid parallel mode. The motor includes a generator. The control module is further configured to determine the drive wheel speed and the required torque for driving the vehicle in hybrid parallel mode; adjust the speed of the generator according to the drive wheel speed, and adjust the torque of the engine according to the required torque for driving the vehicle; and control the torque of the generator when a first switching condition is met, so that the generator is maintained at the current speed. The motor also includes a drive motor. The control module is further configured to increase the torque of the generator, decrease the torque of the drive motor, and maintain the torque of the engine when the second switching condition is met; and to adjust the torque of the drive motor when the third switching condition is met.

7. A vehicle operating mode switching apparatus characterized by comprising: The vehicle operating mode switching device includes: a memory, a processor, and a vehicle operating mode switching program stored in the memory and running on the processor, the vehicle operating mode switching program being configured to implement the vehicle operating mode switching method as described in any one of claims 1 to 5.

8. A storage medium, characterized by The storage medium stores a vehicle operating mode switching program, which, when executed by a processor, implements the vehicle operating mode switching method as described in any one of claims 1 to 5.

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