Hybrid vehicle switching control method, vehicle controller, and hybrid vehicle

Abstract

The present invention provides a switching control method for a hybrid vehicle, a vehicle control unit, and a hybrid vehicle. The method is applied in the field of vehicle control technology and includes: detecting in real time the switching frequency between target operating modes of the hybrid vehicle; when the switching frequency is greater than a preset frequency, updating, according to the switching frequency, the condition parameters for the hybrid vehicle to switch between the target operating modes; and determining, based on the updated condition parameters, whether to control the hybrid vehicle to perform the switching between the target operating modes. When the switching frequency is greater than the preset frequency, the present invention can reduce the switching frequency between the target operating modes of the hybrid vehicle by updating the condition parameters for the hybrid vehicle to switch between the target operating modes, and reduce the drivability problems caused by frequent mode switching. Moreover, through the adaptive adjustment of the condition parameters, the present invention can also support the switching control of the hybrid vehicle under various switching frequencies, with more flexible control and a wider adaptation range.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle control, and more specifically, relates to a switching control method for a hybrid vehicle, a vehicle control unit, and a hybrid vehicle. Background Art

[0002] When a driver is driving a vehicle, there are sometimes frequent accelerations and decelerations, and at this time, the vehicle will have a phenomenon of frequent mode switching. In addition, there may be uneven power torque distribution during the mode switching process. Therefore, when switching modes frequently, the torque unevenness of the vehicle will be particularly obvious, and this problem is particularly obvious in hybrid vehicles. Summary of the Invention

[0003] The purpose of the present invention is to provide a switching control method for a hybrid vehicle, a vehicle control unit, and a hybrid vehicle to reduce the drivability problems caused by frequent mode switching.

[0004] To achieve the above object, the first aspect of the present invention provides a switching control method for a hybrid vehicle, including:

[0005] Real-time detecting the switching frequency of the hybrid vehicle between target operating modes;

[0006] When the switching frequency is greater than a preset frequency, updating the condition parameters for the hybrid vehicle to switch between target operating modes according to the switching frequency;

[0007] Based on the updated condition parameters, determining whether to control the hybrid vehicle to perform a switch between target operating modes.

[0008] In a possible implementation, the real-time detecting the switching frequency of the hybrid vehicle between target operating modes includes:

[0009] Real-time detecting the number of switching times of the hybrid vehicle between target operating modes in the latest time period;

[0010] Determining the switching frequency of the hybrid vehicle between target operating modes according to the number of switching times.

[0011] In a possible implementation, the real-time detecting the switching frequency of the hybrid vehicle between target operating modes includes:

[0012] Real-time detecting the duration taken for the hybrid vehicle to perform the latest N times of switching between target operating modes, where N is a preset number;

[0013] Determining the switching frequency of the hybrid vehicle between target operating modes according to the duration taken for the hybrid vehicle to perform the latest N times of switching.

[0014] In a possible implementation manner, updating the conditional parameters when the hybrid vehicle switches between target operating modes according to the switching frequency includes:

[0015] Determining the switching mode level of the hybrid vehicle according to the switching frequency;

[0016] Updating the conditional parameters when the hybrid vehicle switches between target operating modes based on the switching mode level.

[0017] In a possible implementation manner, the conditional parameters include the reserved torque of the engine of the hybrid vehicle;

[0018] The reserved torque of the engine of the hybrid vehicle is positively correlated with the switching frequency.

[0019] In a possible implementation manner, the conditional parameters include the delay duration when the hybrid vehicle switches between target operating modes;

[0020] The delay duration when the hybrid vehicle switches between target operating modes is positively correlated with the switching frequency.

[0021] In a possible implementation manner, the target operating modes are the series mode and the parallel mode;

[0022] The hybrid vehicle operating in the series mode means that the engine of the hybrid vehicle outputs a power generation torque and the motor of the hybrid vehicle provides a driving torque, and the hybrid vehicle operating in the parallel mode means that both the engine and the motor of the hybrid vehicle output driving torques.

[0023] In a second aspect of the present invention, a vehicle controller is further provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned switching control method of the hybrid vehicle are implemented.

[0024] In a third aspect of the present invention, a computer-readable storage medium is further provided. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned switching control method of the hybrid vehicle are implemented.

[0025] In a fourth aspect of the present invention, a hybrid vehicle is further provided, including the above-mentioned vehicle controller.

[0026] The beneficial effects of the switching control method, vehicle controller, and hybrid vehicle of the hybrid vehicle provided by the present invention are as follows:

[0027] To solve the drivability problems caused by frequent mode switching, when the switching frequency of the target operating mode of the hybrid vehicle is greater than the preset frequency, the present invention updates the condition parameters when the hybrid vehicle switches between the target operating modes according to the switching frequency, so as to reduce the switching frequency between the target operating modes of the hybrid vehicle, thereby reducing the drivability problems caused by frequent mode switching. Moreover, through the adaptive adjustment of the condition parameters, the present invention can also support the switching control of the hybrid vehicle under various switching frequencies, that is, the control is more flexible and the applicable range is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 Schematic flowchart of the switching control method for a hybrid vehicle provided by an embodiment of the present invention;

[0030] Figure 2 Schematic diagram corresponding to the switching mode level and the time taken for the hybrid vehicle to switch between the nearest N target operating modes;

[0031] Figure 3 Schematic diagram corresponding to the switching mode level and the engine torque provided by an embodiment of the present invention;

[0032] Figure 4 Schematic diagram corresponding to the switching mode level and the delay time when the hybrid vehicle switches between the target operating modes provided by an embodiment of the present invention;

[0033] Figure 5 Schematic diagram of the structure of the vehicle controller provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0036] Please refer to Figure 1 , Figure 1Schematic flowchart of the switching control method for a hybrid vehicle provided by an embodiment of the present invention. A first aspect of the present invention provides a switching control method for a hybrid vehicle. The switching control method for the hybrid vehicle includes:

[0037] S101: Detect the switching frequency of the hybrid vehicle between target operating modes in real time.

[0038] S102: When the switching frequency is greater than a preset frequency, update the condition parameters for the hybrid vehicle to switch between target operating modes according to the switching frequency.

[0039] S103: Based on the updated condition parameters, determine whether to control the hybrid vehicle to perform a switch between target operating modes.

[0040] In this embodiment, the target operating mode refers to the operating mode of the hybrid vehicle, which includes at least two modes. Specifically, when the target operating mode includes two modes A and B, the switch of the hybrid vehicle between the target operating modes means that the hybrid vehicle switches from mode A to mode B, or the hybrid vehicle switches from mode B to mode A. When the target operating mode includes three modes A, B, and C, the switch of the hybrid vehicle between the target operating modes means that the hybrid vehicle switches from mode A to mode B, or the hybrid vehicle switches from mode B to mode A, or the hybrid vehicle switches from mode A to mode C, or the hybrid vehicle switches from mode C to mode A, or the hybrid vehicle switches from mode B to mode C, or the hybrid vehicle switches from mode C to mode B. When the target operating mode includes more modes, it is similar to the foregoing example and will not be elaborated here.

[0041] In this embodiment, the switching frequency of the hybrid vehicle between the target operating modes can be detected in real time, and the condition parameters for the hybrid vehicle to switch between the target operating modes are determined based on this switching frequency. Specifically, when the switching frequency is greater than the preset frequency, the condition parameters for the hybrid vehicle to switch between the target operating modes are updated according to the switching frequency. When the switching frequency is not greater than the preset frequency, the default condition parameters for the hybrid vehicle to switch between the target operating modes set in advance can be used, that is, the condition parameters are not updated.

[0042] Among them, the condition parameters refer to the parameters involved in condition determination when the hybrid vehicle switches between target operating modes, that is, the parameters that will affect the switching timing of the hybrid vehicle between target operating modes.

[0043] In a possible implementation manner, detecting the switching frequency of the hybrid vehicle between the target operating modes in real time includes:

[0044] Real-time detect the number of times of switching between target operation modes of a hybrid vehicle within the latest time period, and determine the switching frequency of the hybrid vehicle between the target operation modes according to the number of times of switching.

[0045] In this embodiment, the duration of the latest time period is fixed. It is possible to real-time detect the number of times of switching (i.e., the number of times of switching) between target operation modes of the hybrid vehicle within the time period from (t - T) to t, and use this number of times of switching to determine the switching frequency of the hybrid vehicle between the target operation modes, or directly use this number of times of switching as a characterization quantity of the switching frequency of the hybrid vehicle between the target operation modes (where t is the current time and T is the duration of the latest time period).

[0046] In a possible implementation manner, real-time detecting the switching frequency of the hybrid vehicle between the target operation modes may further include:

[0047] Real-time detect the duration taken for the hybrid vehicle to perform the latest N times of switching between the target operation modes, where N is a preset number. Determine the switching frequency of the hybrid vehicle between the target operation modes according to the duration taken for the hybrid vehicle to perform the latest N times of switching.

[0048] In this embodiment, it is also possible to detect the duration taken for the hybrid vehicle to perform the latest N times of switching between the target operation modes, determine the switching frequency of the hybrid vehicle between the target operation modes based on the duration taken for the hybrid vehicle to perform the latest N times of switching, or directly use the duration taken for the latest N times of switching as a characterization quantity of the switching frequency of the hybrid vehicle between the target operation modes.

[0049] In a possible implementation manner, updating the condition parameters when the hybrid vehicle switches between the target operation modes according to the switching frequency includes:

[0050] Determine the switching mode level of the hybrid vehicle according to the switching frequency.

[0051] Update the condition parameters when the hybrid vehicle switches between the target operation modes based on the switching mode level.

[0052] In this embodiment, different levels, that is, switching mode levels, can be divided for different magnitudes of the switching frequency. For different switching mode levels, the update amount or adjustment amount of the condition parameters when the hybrid vehicle switches between the target operation modes is different.

[0053] In this embodiment, the above solution can be illustrated by way of example. For example, the durations (A, B, C, where A < B < C) taken for the three hybrid vehicles to make the nearest N switches and three levels (level 1, level 2, level 3) can be set. Assuming that within a period Ts, the hybrid vehicle switches between the target operating modes N times, based on this:

[0054] If Ts ∈ (0, A], then determine that the switching mode level is level 3.

[0055] If Ts ∈ (A, B], then determine that the switching mode level is level 2.

[0056] If Ts ∈ (B, C], then determine that the switching mode level is level 1.

[0057] If Ts ∈ (C, +∞], then determine that the switching mode level is level 0.

[0058] For a specific example, reference can be made to Figure 2 (where, before the corresponding mode is activated and after the corresponding mode is activated). Figure 2 Taking the example of a hybrid vehicle switching between the target operating modes three times (i.e., N = 3, and the duration Ts is subject to the length shown in the figure), then there are a ∈ (B, C], b ∈ (A, B], c / d ∈ (0, A], e ∈ (C, +∞]. That is to say, the greater the switching frequency, the higher the switching mode level.

[0059] In a possible implementation, the conditional parameter can include the reserved torque of the hybrid vehicle engine.

[0060] The reserved torque of the hybrid vehicle engine is positively correlated with the switching frequency.

[0061] In this embodiment, the greater the switching frequency, the greater the reserved torque of the hybrid vehicle engine. This method can ensure that after the hybrid vehicle switches between the target operating modes (for example, after the hybrid vehicle switches from the series mode to the parallel mode), the assisting ability of the drive motor covers a larger torque range and can also meet the working conditions with a possible greater required torque. Moreover, the greater the reserved torque, the less likely it is to switch between the target operating modes. Therefore, the switching frequency of the target operating mode can be effectively reduced, and the driving performance problems caused by frequent mode switching can be reduced.

[0062] On this basis, this embodiment can be understood in combination with the above embodiments. Please refer to Figure 3 , Figure 3 shows the magnitudes of the engine reserved torques under different switching mode levels (corresponding to different switching frequencies). From Figure 3It can be seen that the greater the switching frequency, the greater the reserved torque of the engine and the larger the torque range of the engine. At this time, it is more difficult to switch to the target operation mode (for example, a hybrid vehicle switches from the series mode to the parallel mode), thereby reducing the switching frequency.

[0063] In a possible implementation, the condition parameter may further include the delay duration when the hybrid vehicle switches between target operation modes. The delay duration when the hybrid vehicle switches between target operation modes is positively correlated with the switching frequency.

[0064] In this embodiment, the greater the switching frequency, the longer the delay duration when the hybrid vehicle switches between target operation modes. This method can also effectively reduce the switching frequency of the hybrid vehicle between target operation modes and reduce the drivability problems caused by frequent mode switching.

[0065] On this basis, this embodiment can be understood in combination with the above embodiments. Please refer to Figure 4 (wherein, before the corresponding mode is activated and after the corresponding mode is activated), Figure 4 shows the delay duration when the hybrid vehicle switches between target operation modes at different switching mode levels (corresponding to different switching frequencies) (where T0, T1, T2, and T3 respectively correspond to level0, level1, level2, and level3). It can be seen that Figure 4 the greater the switching frequency, the longer the delay duration when the hybrid vehicle switches between target operation modes. The foregoing embodiment can reserve sufficient torque for the whole vehicle and prevent mis-triggering at the same time. However, during the operation of the whole vehicle, the vehicle speed and torque are constantly changing. When encountering some working conditions, the conditions for switching between target operation modes may be met in a short time, which may lead to mode switching. To avoid such a scenario, such triggering can determine the delay duration when the hybrid vehicle switches between target operation modes according to the mode switching level. That is to say, when other conditions for switching between target operation modes are met, it is necessary to reach this delay duration to control the hybrid vehicle to perform the switching action between target operation modes. In this way, the frequent occurrence of mis-triggering situations can be avoided, and the stability of mode switching and a relatively stable driving environment can be ensured.

[0066] In a possible implementation, the target operation modes are the series mode and the parallel mode.

[0067] When the hybrid vehicle operates in the series mode, it means that the engine of the hybrid vehicle outputs power generation torque and the motor of the hybrid vehicle provides driving torque. When the hybrid vehicle operates in the parallel mode, it means that both the engine and the motor of the hybrid vehicle output driving torque.

[0068] In this embodiment, the switching between the series-parallel modes is more likely to cause torque unevenness of the whole vehicle during frequent switching due to the participation of the engine in driving. Therefore, the present invention gives priority to considering the influence brought by the frequent switching between the series mode and the parallel mode. Of course, this solution is also applicable to other modes in which frequent switching will affect driving behavior.

[0069] Please refer to Figure 5 , the second aspect of the present invention also provides a vehicle controller 500, including: one or more processors 501, one or more input devices 502, one or more output devices 503, and one or more memories 504. The above-mentioned processors 501, input devices 502, output devices 503, and memories 504 complete communication with each other through a communication bus 505. The memory 504 is used to store computer programs, and the computer programs include program instructions. The processor 501 is used to execute the program instructions stored in the memory 504. Among them, the processor 501 is configured to call the program instructions to execute the steps of the above-mentioned method embodiments. It should be understood that in the embodiments of the present invention, the so-called processor 501 may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The input device 502 may include a touchpad, a fingerprint collection sensor (for collecting the fingerprint information and the direction information of the fingerprint of the user), a microphone, etc., and the output device 503 may include a display (such as an LCD), a speaker, etc. The memory 504 may include a read-only memory and a random access memory, and provide instructions and data to the processor 501. A part of the memory 504 may also include a non-volatile random access memory. For example, the memory 504 may also store information about the device type. In specific implementation, the processors 501, input devices 502, and output devices 503 described in the embodiments of the present invention may implement the implementation manners described in the first embodiment and the second embodiment of the switching control method for a hybrid vehicle provided by the embodiments of the present invention.

[0070] In a third aspect of the present invention, there is provided a computer-readable storage medium storing a computer program. The computer program includes program instructions. When the program instructions are executed by a processor, all or part of the processes in the methods of the above embodiments are implemented. It can also be completed by instructing related hardware through the computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0071] The computer-readable storage medium can be the internal storage unit of the terminal in any of the foregoing embodiments, such as the hard disk or memory of the terminal. The computer-readable storage medium can also be an external storage device of the terminal, such as a plug-in hard disk equipped on the terminal, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the computer-readable storage medium can also include both the internal storage unit and the external storage device of the terminal. The computer-readable storage medium is used to store the computer program and other programs and data required by the terminal. The computer-readable storage medium can also be used to temporarily store the data that has been output or will be output.

[0072] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the components and steps of the examples have been generally described according to their functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0073] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described vehicle controller can refer to the corresponding process in the foregoing method embodiments, and will not be elaborated herein.

[0074] In several embodiments provided by the present application, it should be understood that the disclosed terminals and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed couplings or direct couplings or communication connections to each other can be indirect couplings or communication connections through some interfaces or units, and can also be electrical, mechanical or other forms of connection.

[0075] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present invention.

[0076] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0077] In the fourth aspect of the present invention, a hybrid vehicle is further provided, including the above-described vehicle controller.

[0078] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A switching control method for a hybrid vehicle, characterized in that Comprising: Real-time detecting the switching frequency of a hybrid vehicle between target operating modes; When the switching frequency is greater than a preset frequency, updating condition parameters for the hybrid vehicle to switch between target operating modes according to the switching frequency; Based on the updated condition parameters, determining whether to control the hybrid vehicle to perform a switch between target operating modes; Wherein, the condition parameters include the reserved torque of the engine of the hybrid vehicle; the reserved torque of the engine of the hybrid vehicle is positively correlated with the switching frequency; The condition parameters further include the delay duration when the hybrid vehicle switches between target operating modes; the delay duration when the hybrid vehicle switches between target operating modes is positively correlated with the switching frequency.

2. The switching control method for a hybrid vehicle according to claim 1, characterized in that, The real-time detecting the switching frequency of a hybrid vehicle between target operating modes includes: Real-time detecting the number of switches of the hybrid vehicle between target operating modes within a latest time period; Determining the switching frequency of the hybrid vehicle between target operating modes according to the number of switches.

3. The switching control method for a hybrid vehicle according to claim 1, characterized in that, The real-time detecting the switching frequency of a hybrid vehicle between target operating modes includes: Real-time detecting the duration taken for the hybrid vehicle to perform the latest N switches between target operating modes, where N is a preset number; Determining the switching frequency of the hybrid vehicle between target operating modes according to the duration taken for the hybrid vehicle to perform the latest N switches.

4. The switching control method of the hybrid vehicle according to claim 1, wherein, The updating the condition parameters for the hybrid vehicle to switch between target operating modes according to the switching frequency includes: Determining a switching mode level of the hybrid vehicle according to the switching frequency; Based on the switching mode level, updating the condition parameters for the hybrid vehicle to switch between target operating modes.

5. The switching control method for a hybrid vehicle according to any one of claims 1 to 4, characterized in that, The target operating modes are a series mode and a parallel mode; The hybrid vehicle operating in the series mode means that the engine of the hybrid vehicle outputs a power generation torque and the motor of the hybrid vehicle provides a driving torque, and the hybrid vehicle operating in the parallel mode means that both the engine and the motor of the hybrid vehicle output driving torques.

6. A vehicle controller, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 5 are implemented.

8. A hybrid vehicle, characterized in that, Comprising a vehicle controller according to claim 6.

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