Method, device, vehicle, medium and equipment for determining target driving mode of hybrid vehicle

Abstract

The present invention provides a method, apparatus, vehicle, medium, and device for determining a target drive mode for a hybrid vehicle. The method determines the maximum power of the vehicle in different drive modes based on the vehicle's operating parameters, and then selects the optimal drive mode that meets the driver's power acceleration requirements based on the vehicle's maximum power in different drive modes. The method includes: obtaining the vehicle's operating parameters; determining the driver's power demand based on the vehicle's operating parameters; when the driver's power demand is identified based on the driver's power demand, determining the vehicle's maximum power in series and parallel modes based on the vehicle's operating parameters; and determining the hybrid vehicle's target drive mode based on the vehicle's maximum power in series and parallel modes, respectively.

Description

Technical Field

[0001] The present invention relates to the field of hybrid vehicle control, and in particular to a method, device, vehicle, medium and equipment for determining a target driving mode of a hybrid vehicle. Background Art

[0002] In recent years, for the sake of environmental protection and energy conservation and emission reduction, hybrid vehicles have been favored by more and more manufacturers due to their technical advantages such as long driving range and low fuel consumption.

[0003] Hybrid vehicles, compared to traditional fuel-powered vehicles, incorporate batteries as an energy source, thus providing greater driving force. When accelerating or overtaking with the accelerator fully depressed, drivers expect the vehicle to deliver greater power output. Vehicle power output is limited by the operating conditions of the engine, drive motor, and battery. These three components are closely related to the vehicle's drive mode. Different drive modes can cause the engine, drive motor, and battery to operate in different states, resulting in different powertrain outputs. Therefore, selecting a drive mode that best meets the driver's power needs has become a pressing issue for researchers in this field. CN101445043A discloses a hybrid drive system. This scheme describes how to determine whether the vehicle's drive mode is pure electric EV mode, series mode, or parallel mode by setting a first predetermined current (SOC0), a second predetermined charge (SOC1), and a third predetermined charge (SOC2); comparing these with the actual SOC; and comparing the first and second predetermined vehicle speeds (Velo1 and Velo2) with the current vehicle speed (Velo). Furthermore, the system considers whether the EV button is pressed to determine whether the vehicle's drive mode is pure electric EV mode, series mode, or parallel mode. The method provided in this solution simply relies on the calibration settings of the predetermined SOC and the predetermined vehicle speed to determine the vehicle's driving mode, and does not involve the content of determining the vehicle's driving mode in combination with the driver's power acceleration demand. Summary of the Invention

[0004] The present invention provides a method, device, vehicle, medium and equipment for determining the target driving mode of a hybrid vehicle. The method no longer relies solely on the accuracy of the SOC and vehicle speed signals and calibration experience. Instead, the method identifies when the driver has a power acceleration demand and obtains the maximum power of the vehicle in different driving modes based on the vehicle's operating parameters. The method then selects the optimal driving mode that meets the driver's power acceleration demand based on the vehicle's maximum power in different driving modes.

[0005] The technical solution of the present invention is:

[0006] The present invention provides a method for determining a target drive mode of a hybrid vehicle. The hybrid vehicle includes at least: a power battery, an engine, a drive motor, a generator, and a clutch. The engine can be connected to or disconnected from a wheel end via the clutch. The drive motor is directly connected to the wheel end. The drive motor is connected to the power battery, the generator is connected to the engine, and the generator is connected to the power battery and / or the drive motor. The method includes:

[0007] Obtain vehicle operating parameters;

[0008] determining a driver demand power based on operating parameters of the vehicle;

[0009] When the driver's power demand is identified according to the driver's demand power, the maximum power of the vehicle in the series mode and the parallel mode is determined based on the vehicle's operating parameters;

[0010] A target driving mode of the hybrid vehicle based on a dynamics perspective is determined based on the maximum power of the vehicle in series mode and parallel mode, respectively.

[0011] Preferably, the method further comprises:

[0012] When the driver's unpowered acceleration demand is identified according to the driver's demand power, the maximum power of the vehicle in pure electric mode is determined based on the vehicle's operating parameters;

[0013] Based on the maximum power of the vehicle in pure electric mode and the power required by the driver, the target driving mode of the hybrid vehicle based on the non-dynamic perspective is determined.

[0014] Preferably, the operating parameters of the vehicle include: the maximum driving power of the driving motor at the current speed, the maximum power of the engine's external characteristics, the maximum power generated by the generator's external characteristics, and the available driving power of the battery;

[0015] The steps of determining the maximum power of the vehicle in series mode based on the operating parameters of the vehicle include:

[0016] The sum is obtained by adding the smaller value of the maximum power of the engine external characteristics and the maximum power generated by the generator external characteristics and the available driving power of the battery;

[0017] The smaller value between the sum and the maximum driving power of the driving motor at the current speed is determined as the maximum power of the vehicle in the series mode.

[0018] Preferably, the operating parameters of the vehicle include: vehicle speed, total speed ratio from engine to wheel end, tire diameter, maximum driving power of the drive motor at the current speed, and available driving power of the battery. The step of determining the maximum power of the vehicle in the parallel mode based on the operating parameters of the vehicle includes:

[0019] Determine the maximum drive power at the target synchronous engine speed based on vehicle speed, engine-to-wheel speed ratio, and tire diameter;

[0020] The maximum power of the vehicle in parallel mode is obtained by adding the smaller value of the maximum driving power of the drive motor at the current speed, the battery available driving power, and the maximum driving power of the engine target synchronous speed.

[0021] Preferably, the step of determining the maximum driving power at the target synchronous speed of the engine based on the vehicle speed, the total speed ratio from the engine to the wheel end, and the tire diameter comprises:

[0022] Determine the synchronous engine speed based on the vehicle speed, the engine-to-wheel speed ratio, and the tire diameter;

[0023] determining a rate of change of the engine synchronous speed based on the engine synchronous speed and the engine synchronous speed determined N preset cycles ago;

[0024] determining a target synchronous speed of the engine based on the synchronous speed of the engine and the rate of change of the synchronous speed of the engine;

[0025] Based on the target synchronous speed of the engine, the maximum driving power at the target synchronous speed of the engine is determined.

[0026] Preferably, by the formula:

[0027] Spd equi =VehSpd*1000*η / 60 / π / D

[0028] Calculate engine synchronous speed Spd equi , VehSpd is the vehicle speed, η is the total speed ratio from the engine to the wheel end, and D is the tire diameter.

[0029] Preferably, by the formula:

[0030]

[0031] Calculate the engine synchronous speed change rate SpdRate equi , Spd equi is the synchronous speed of the engine, is the synchronous speed of the engine N calculation cycles ago.

[0032] Preferably, by the formula:

[0033] TgtSynSpd=Spd equi +SpdRate equi *δ

[0034] Calculate the target synchronous speed of the engine TgtSynSpd, Spd equi is the engine synchronous speed, SpdRateequi is the engine synchronous speed change rate, δ is the prediction coefficient, and δ is the preset value.

[0035] Preferably, the vehicle's operating parameters also include: vehicle speed, accelerator pedal signal;

[0036] The steps of determining the driver's required power based on the vehicle's operating parameters include:

[0037] The driver demand power is determined based on the vehicle speed and the accelerator pedal signal.

[0038] Preferably, the specific process of identifying the driver's power acceleration demand according to the driver's demand power is as follows:

[0039] If the power demanded by the driver is greater than the preset power, it is determined that the driver has a power acceleration demand; otherwise, it is determined that the driver has no power acceleration demand;

[0040] The preset power is determined based on the vehicle speed and the actual SOC of the battery.

[0041] Preferably, the step of determining the target driving mode of the hybrid vehicle based on the dynamics angle based on the maximum power of the vehicle in the series mode and the parallel mode respectively includes:

[0042] If a difference between the maximum power of the vehicle in the series mode and the maximum power of the vehicle in the parallel mode is greater than a first predetermined difference, or if the maximum power of the vehicle in the series mode is greater than the maximum power of the vehicle in the parallel mode, determining that the target driving mode of the hybrid vehicle based on the dynamics perspective is the series mode;

[0043] If the difference between the maximum power of the vehicle in parallel mode and the maximum power of the vehicle in series mode is greater than a second preset difference, or if the maximum power of the vehicle in parallel mode is greater than or equal to the maximum power of the vehicle in series mode, the target driving mode of the hybrid vehicle based on the dynamic perspective is determined to be the parallel mode.

[0044] Preferably, the operating parameters of the vehicle also include: the available driving power of the battery and the maximum driving power of the driving motor at the current speed;

[0045] The steps of determining the maximum power of the vehicle in pure electric mode based on the operating parameters of the vehicle include:

[0046] The smaller value between the available driving power of the battery and the maximum driving power of the driving motor at the current speed is determined as the maximum power of the vehicle in pure electric mode.

[0047] Preferably, the step of determining the target driving mode of the hybrid vehicle based on the non-power angle based on the maximum power of the vehicle in the pure electric mode and the power required by the driver includes:

[0048] If the driver's required power is less than the maximum power of the vehicle in the pure electric mode, the target driving mode of the hybrid vehicle based on the non-power perspective is determined to be the pure electric mode;

[0049] If the driver's required power is greater than or equal to the maximum power of the vehicle in the pure electric mode, the hybrid vehicle target driving mode based on the non-power angle is determined as the current driving mode of the vehicle.

[0050] The present invention provides a device for determining a target drive mode of a hybrid vehicle. The hybrid vehicle includes at least: a power battery, an engine, a drive motor, a generator, and a clutch. The engine can be connected to or disconnected from a wheel end via the clutch. The drive motor is directly connected to the wheel end. The drive motor is connected to the power battery, the generator is connected to the engine, and the generator is connected to the power battery and / or the drive motor. The device includes:

[0051] An acquisition module, used to obtain the operating parameters of the vehicle;

[0052] a driver demand power determination module, configured to determine the driver demand power based on operating parameters of the vehicle;

[0053] a first power determination module, configured to determine the maximum power of the vehicle in the series mode and the parallel mode respectively based on the operating parameters of the vehicle when the driver's power demand is identified as a power acceleration demand of the driver;

[0054] The first target driving mode determination module is configured to determine a target driving mode of the hybrid vehicle based on a dynamic performance angle based on the maximum power of the vehicle in the series mode and the parallel mode.

[0055] Preferably, the device further comprises:

[0056] a second power determination module, configured to determine the maximum power of the vehicle in the pure electric mode based on the vehicle operating parameters when the driver's unpowered acceleration demand is identified according to the driver's demanded power;

[0057] The second target driving mode determination module is configured to determine a target driving mode of the hybrid vehicle based on a non-power angle based on the maximum power of the vehicle in the pure electric mode and the power required by the driver.

[0058] Preferably, the operating parameters of the vehicle include: the maximum driving power of the driving motor at the current speed, the maximum power of the engine's external characteristics, the maximum power generated by the generator's external characteristics, and the available driving power of the battery;

[0059] The first power determination module includes:

[0060] a sum value determining unit, configured to add the smaller value of the maximum power of the engine external characteristics and the maximum power generated by the generator external characteristics to the available driving power of the battery to obtain a sum value;

[0061] The series mode maximum power determination unit is used to determine the smaller value between the sum value and the maximum driving power of the driving motor at the current speed as the maximum power of the vehicle in the series mode.

[0062] Preferably, the first power determination module further includes:

[0063] an engine target synchronous speed maximum driving power determination unit, configured to determine the engine target synchronous speed maximum driving power based on vehicle speed, engine-to-wheel end total speed ratio, and tire diameter;

[0064] The parallel mode maximum power determination unit is used to add the smaller value of the maximum driving power of the driving motor at the current speed and the battery available driving power to the maximum driving power of the engine target synchronous speed to obtain the maximum power of the vehicle in parallel mode.

[0065] Preferably, the first target driving mode determination module includes:

[0066] a first target driving mode determining unit configured to determine that the target driving mode of the hybrid vehicle based on a dynamics perspective is the series mode if a difference between a maximum power of the vehicle in the series mode and a maximum power of the vehicle in the parallel mode is greater than a first predetermined difference, or if the maximum power of the vehicle in the series mode is greater than the maximum power of the vehicle in the parallel mode;

[0067] The second target driving mode determination unit is configured to determine that the target driving mode of the hybrid vehicle based on the dynamic performance perspective is the parallel mode if a difference between the maximum power of the vehicle in the parallel mode and the maximum power of the vehicle in the series mode is greater than a second preset difference, or if the maximum power of the vehicle in the parallel mode is greater than or equal to the maximum power of the vehicle in the series mode.

[0068] Preferably, the operating parameters of the vehicle also include: the available driving power of the battery and the maximum driving power of the driving motor at the current speed;

[0069] The second power determination module includes:

[0070] The pure electric mode maximum power determination unit is used to determine the smaller value between the battery's available driving power and the maximum driving power of the driving motor at the current speed as the vehicle's maximum power in the pure electric mode.

[0071] Preferably, the second target driving mode determination module includes:

[0072] a third target driving mode determining unit, configured to determine the target driving mode of the hybrid vehicle based on the non-power angle to be the pure electric mode if the driver's required power is less than the maximum power of the vehicle in the pure electric mode;

[0073] The fourth target driving mode determining unit is configured to determine the hybrid vehicle target driving mode based on the non-power angle as the current driving mode of the vehicle if the driver's required power is greater than or equal to the maximum power of the vehicle in the pure electric mode.

[0074] The present invention also provides a vehicle, comprising the above-mentioned device for determining a target driving mode of a hybrid vehicle based on a dynamic performance angle.

[0075] The present invention also provides a control device, including a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the target driving mode determination method of the hybrid vehicle as described above are implemented.

[0076] The present invention further provides a readable storage medium storing a program or instruction. When the program or instruction is executed by a processor, the steps of the target driving mode determination method for a hybrid vehicle as described above are implemented.

[0077] The beneficial effects of the present invention are:

[0078] Instead of relying solely on the accuracy of SOC and vehicle speed signals and calibration experience, the system predicts the target engine speed based on the vehicle status and calculates the maximum power of the vehicle in different driving modes, thereby improving the accuracy of the target driving mode determination.

[0079] Existing technologies often rely on calibration experience to switch drive modes. This can be problematic, especially when the driver demands full throttle or overtaking acceleration, and cannot guarantee the vehicle's full potential. This solution promptly and accurately determines the target drive mode that maximizes the vehicle's capabilities when the driver demands acceleration, ensuring the driver's acceleration needs are met to the greatest extent possible. This avoids user complaints caused by insufficient or weak acceleration due to inappropriate driving modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 This is the power architecture diagram of a hybrid vehicle with P13 configuration;

[0081] Figure 2 is a flow chart of a method for determining a target driving mode of a hybrid vehicle in this embodiment;

[0082] Figure 3 Detailed flowchart of step S221 in this embodiment;

[0083] Figure 4 is a detailed flow chart of the target driving mode determination method for the hybrid vehicle in this embodiment;

[0084] Figure 5 2 is a structural block diagram of the hybrid vehicle driving mode control device in this embodiment. DETAILED DESCRIPTION

[0085] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the various details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0086] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0087] Because existing hybrid vehicles only consider drive mode selection based on certain vehicle calibration data and lack the technical means to select the optimal drive mode that meets the driver's power needs by incorporating the driver's acceleration needs, the accuracy of the vehicle's target drive mode determination is low, resulting in insufficient or weak acceleration after switching drive modes, leading to user complaints. To address this issue, embodiments of the present invention provide a method for determining the target drive mode of a hybrid vehicle. This method no longer relies solely on the accuracy of SOC and vehicle speed signals and calibration experience, but instead predicts the target engine speed based on vehicle conditions and calculates the vehicle's maximum power under different drive modes, improving the accuracy of target drive mode determination. Furthermore, when the driver demands acceleration, the method of this embodiment can promptly and accurately determine the target drive mode that maximizes the vehicle's capabilities, ensuring that the driver's acceleration needs are fully met. This avoids user complaints caused by insufficient or weak acceleration due to inappropriate drive mode switching.

[0088] Reference Figure 1The target driving mode determination method for a hybrid vehicle provided in this embodiment is mainly applicable to hybrid vehicles with the following characteristics: a hybrid vehicle at least includes: a power battery, an engine, a drive motor, a generator, and a clutch; the engine can be connected to or disconnected from the wheel end through the clutch; the drive motor is directly connected to the wheel end; the drive motor is connected to the power battery; the generator is connected to the engine; and the generator is connected to the power battery and / or the drive motor. Figure 1 For the P13 hybrid vehicle, the generator is Figure 1 The P1 motor in the figure is the drive motor. Figure 1 The P3 motor in the clutch refers to Figure 1 For a hybrid vehicle with a P13 configuration, the P1 generator is connected to both the power battery and the P3 drive motor. In this embodiment, the hybrid vehicle described above can also be applied to vehicles with other configurations, as long as the vehicles have the aforementioned specific features.

[0089] like Figure 2 and Figure 4 The hybrid vehicle driving mode control method provided in this embodiment specifically includes:

[0090] Step S10, obtaining the operating parameters of the vehicle.

[0091] In this embodiment, the vehicle operating parameters specifically include the following parameters:

[0092] Vehicle speed, accelerator pedal signal, actual battery SOC, total speed ratio from engine to wheel end, tire diameter, maximum driving power of the drive motor at the current speed, maximum power of the engine's external characteristics, maximum power generation of the generator's external characteristics, and available battery driving power.

[0093] Among them, the above-mentioned vehicle speed signal and accelerator pedal signal are obtained in real time from relevant sensors on the vehicle, and the tire diameter is a preset value; the total speed ratio from the engine to the wheel end is a preset value, the maximum driving power of the drive motor at the current speed is obtained from the drive motor external characteristic curve, the actual SOC of the battery and the available driving power of the battery are obtained from the battery control unit, the maximum generated power of the generator external characteristic is obtained from the generator external characteristic curve, and the maximum power of the engine external characteristic is obtained from the engine external characteristic curve.

[0094] Step S20 : determining the driver's required power based on the vehicle's operating parameters.

[0095] Specifically, the driver's required power is determined based on the vehicle speed and the accelerator pedal signal. The driver's required power is obtained by looking up a table based on the vehicle speed and the accelerator pedal opening, and a predetermined correspondence table of vehicle speed and accelerator pedal opening is pre-calibrated.

[0096] Step S30 : when it is identified according to the driver's required power that the driver has a power acceleration demand, the maximum power of the vehicle in the series mode and the parallel mode is determined based on the vehicle's operating parameters.

[0097] If the driver's requested power exceeds the preset power, it is determined that the driver has a powered acceleration request; otherwise, it is determined that the driver has a non-powered acceleration request. The preset power is determined based on the vehicle speed and the actual battery SOC. A pre-calibrated table of predetermined correspondences between vehicle speed, actual battery SOC, and preset power is used to determine the specific value of the preset power by looking up the table.

[0098] Specifically, the steps of determining the maximum power of the vehicle in the series mode based on the operating parameters of the vehicle include:

[0099] Step S311, adding the smaller value of the maximum power of the engine external characteristics and the maximum power generated by the generator external characteristics to the available driving power of the battery to obtain a sum value;

[0100] Step S312 : Determine the smaller value between the sum and the maximum driving power of the driving motor at the current speed as the maximum power of the vehicle in the series mode.

[0101] The steps of determining the maximum power of the vehicle in the parallel mode based on the operating parameters of the vehicle include:

[0102] Step S321, determining the maximum driving power at the target synchronous speed of the engine based on the vehicle speed, the total speed ratio from the engine to the wheel end, and the tire diameter;

[0103] Step S322 : The maximum power of the vehicle in the parallel mode is obtained by adding the smaller value of the maximum driving power of the driving motor at the current speed and the available driving power of the battery to the maximum driving power at the target synchronous speed of the engine.

[0104] Combine Figure 3 In this embodiment, step S321 specifically includes:

[0105] Step S3211, determining the engine synchronous speed based on the vehicle speed, the engine-to-wheel speed ratio, and the tire diameter;

[0106] Step S3212, determining the engine synchronous speed change rate based on the engine synchronous speed and the engine synchronous speed determined N preset cycles ago;

[0107] Step S3213, determining the target engine synchronous speed based on the engine synchronous speed and the engine synchronous speed change rate;

[0108] Step S3214: Determine the maximum driving power at the target synchronous speed of the engine based on the target synchronous speed of the engine.

[0109] Furthermore, PwrMax SHEV is the maximum power of the vehicle in series mode, calculated as follows:

[0110] PwrMax SHEV =min[P3PwrMax,min(EngPwrMax,P1GenPwrMax)+BattDrvPwr]

[0111] Among them, P3PwrMax is the maximum driving power of the drive motor at the current speed, EngPwrMax is the maximum driving power of the engine's external characteristics, P1GenPwrMax is the maximum generated power of the generator's external characteristics, and BattDrvPwr is the available driving power of the battery.

[0112] Further, PwrMax PHEV is the maximum power of the vehicle in parallel mode, and the calculation formula is as follows:

[0113] PwrMax PHEV =EngPwrMax Synspd +min[P3PwrMax,BattDrvPwr]

[0114] Among them, EngPwrMax Synspd is the maximum driving power at the target synchronous speed of the engine, P3PwrMax is the maximum driving power of the drive motor at the current speed, and BattDrvPwr is the available driving power of the battery.

[0115] Furthermore, TgtSynSpd is the target synchronous speed of the engine, and the calculation formula is as follows:

[0116] TgtSynSpd=Spd equi +SpdRate equi *δ

[0117] Among them, Spd equi is the engine synchronous speed, δ is the prediction coefficient, which is a calibrated value, such as 1.

[0118] Further, SpdRate equi is the engine synchronous speed change rate, and the calculation formula is as follows:

[0119]

[0120] in, is the synchronous speed of the engine N calculation cycles ago, which is a calibrated value, such as 3.

[0121] Further, Spd equi is the engine synchronous speed, and the calculation formula is as follows:

[0122] Spd equi =VehSpd*1000*η / 60 / π / D

[0123] Where VehSpd is the vehicle speed, η is the total speed ratio from the engine to the wheel end, and D is the tire diameter.

[0124] Step S40 : determining a target driving mode of the hybrid vehicle based on a dynamic performance angle based on the maximum power of the vehicle in the series mode and the parallel mode, respectively.

[0125] Specifically, if a difference between the maximum power of the vehicle in the series mode and the maximum power of the vehicle in the parallel mode is greater than a first predetermined difference, or if the maximum power of the vehicle in the series mode is greater than the maximum power of the vehicle in the parallel mode, determining that the target driving mode of the hybrid vehicle based on the dynamics perspective is the series mode;

[0126] If the difference between the maximum power of the vehicle in parallel mode and the maximum power of the vehicle in series mode is greater than a second preset difference, or if the maximum power of the vehicle in parallel mode is greater than or equal to the maximum power of the vehicle in series mode, the target driving mode of the hybrid vehicle based on the dynamic perspective is determined to be the parallel mode.

[0127] That is, if (PwrMax SHEV -PwrMax PHEV )≥TBD1 (first preset difference), TBD1 is a calibration value, such as 2Kw, or, if PwrMax SHEV ﹥PwrMax PHEV , the output target driving mode is series mode.

[0128] Furthermore, if (PwrMax PHEV -PwrMax SHEV )≥TBD2 (second preset difference), TBD2 is a calibration value, such as 2Kw, or, if PwrMax PHEV ≥PwrMax SHEV , the output target drive mode is parallel mode.

[0129] Step S50 : When the driver's unpowered acceleration demand is identified according to the driver's demanded power, the maximum power of the vehicle in the pure electric mode is determined based on the vehicle's operating parameters.

[0130] In this embodiment, step S50 specifically includes:

[0131] In step S511 , the smaller value between the available driving power of the battery and the maximum driving power of the driving motor at the current speed is determined as the maximum power of the vehicle in the pure electric mode.

[0132] Step S60 : determining a target driving mode of the hybrid vehicle based on a non-power angle based on the maximum power of the vehicle in the pure electric mode and the power required by the driver.

[0133] In this embodiment, the non-dynamic angle may be an economic angle or other angles.

[0134] In this embodiment, the priority of the hybrid vehicle target driving mode based on the non-power angle is higher than the priority of the hybrid vehicle target driving mode based on the non-power angle.

[0135] Specifically, step S60 includes:

[0136] Step S611 , if the driver's required power is less than the maximum power of the vehicle in the pure electric mode, determining the target driving mode of the hybrid vehicle based on the non-power angle to be the pure electric mode;

[0137] Step S612 : If the driver's required power is greater than or equal to the maximum power of the vehicle in the pure electric mode, the hybrid vehicle target driving mode based on the non-power angle is determined as the current driving mode of the vehicle.

[0138] The above method of this embodiment can promptly and accurately determine the target driving mode that can achieve the maximum capability of the vehicle when the driver has a power acceleration demand, so that the driver's power acceleration demand can be met to the maximum extent, thereby avoiding user complaints caused by insufficient vehicle acceleration or weak acceleration due to failure to switch to the appropriate driving mode.

[0139] like Figure 5 The embodiment of the present invention further provides a device for determining a target driving mode of a hybrid vehicle based on a dynamic performance perspective, wherein the hybrid vehicle comprises at least: a power battery, an engine, a drive motor, a generator, and a clutch, wherein the engine can be connected to or disconnected from the wheel end via the clutch, the drive motor is directly connected to the wheel end, the drive motor is connected to the power battery, the generator is connected to the engine, and the generator is connected to the power battery and / or the generator, as shown in FIG. Figure 4 , the device comprises:

[0140] An acquisition module 101 is used to acquire operating parameters of a vehicle;

[0141] a driver demand power determination module 102 for determining the driver demand power based on the operating parameters of the vehicle;

[0142] A first power determination module 103 is configured to determine the maximum power of the vehicle in the series mode and the parallel mode based on the vehicle operating parameters when the driver's power demand is identified as a power acceleration demand of the driver;

[0143] The first target driving mode determination module 104 is configured to determine a target driving mode of the hybrid vehicle based on a dynamic performance angle based on the maximum power of the vehicle in the series mode and the parallel mode.

[0144] Preferably, the device further comprises:

[0145] a second power determination module 105 for determining the maximum power of the vehicle in the pure electric mode based on the operating parameters of the vehicle when the driver's unpowered acceleration demand is identified according to the driver's demanded power;

[0146] The second target driving mode determination module 106 is configured to determine a target driving mode of the hybrid vehicle based on a non-power angle based on the maximum power of the vehicle in the pure electric mode and the power required by the driver.

[0147] Preferably,

[0148] The vehicle's operating parameters include: the maximum driving power of the drive motor at the current speed, the maximum power of the engine's external characteristics, the maximum power generated by the generator's external characteristics, and the battery's available driving power;

[0149] The first power determination module 103 includes:

[0150] a sum value determining unit 1031 for adding the smaller value of the maximum power of the engine external characteristics and the maximum power generated by the generator external characteristics to the available driving power of the battery to obtain a sum value;

[0151] The series mode maximum power determination unit 1032 is configured to determine the smaller value between the sum and the maximum driving power of the driving motor at the current speed as the maximum power of the vehicle in the series mode.

[0152] Preferably, the first power determination module 103 further includes:

[0153] The engine target synchronous speed maximum driving power determination unit 1034 is used to determine the engine target synchronous speed maximum driving power based on the vehicle speed, the engine-to-wheel end total speed ratio and the tire diameter;

[0154] The parallel mode maximum power determination unit 1035 is used to add the smaller value of the maximum driving power of the driving motor at the current speed and the battery available driving power to the maximum driving power of the engine target synchronous speed to obtain the maximum power of the vehicle in the parallel mode.

[0155] The vehicle's operating parameters also include: the available driving power of the battery and the maximum driving power of the drive motor at the current speed;

[0156] Preferably, the first target driving mode determination module 104 includes:

[0157] a first target driving mode determining unit 1041 for determining that the target driving mode of the hybrid vehicle based on the dynamics perspective is the series mode if a difference between the maximum power of the vehicle in the series mode and the maximum power of the vehicle in the parallel mode is greater than a first predetermined difference, or if the maximum power of the vehicle in the series mode is greater than the maximum power of the vehicle in the parallel mode;

[0158] The second target driving mode determination unit 1042 is configured to determine that the target driving mode of the hybrid vehicle based on the dynamic performance perspective is the parallel mode if a difference between the maximum power of the vehicle in the parallel mode and the maximum power of the vehicle in the series mode is greater than a second preset difference, or if the maximum power of the vehicle in the parallel mode is greater than or equal to the maximum power of the vehicle in the series mode.

[0159] Preferably, the second power determination module 105 includes:

[0160] The pure electric mode maximum power determination unit 1051 is used to determine the smaller value between the battery's available driving power and the maximum driving power of the driving motor at the current speed as the maximum power of the vehicle in the pure electric mode.

[0161] Preferably, the second target driving mode determination module 106 includes:

[0162] a third target driving mode determining unit 1061 , configured to determine the target driving mode of the hybrid vehicle based on the non-power angle to be the pure electric mode if the driver's required power is less than the maximum power of the vehicle in the pure electric mode;

[0163] The fourth target driving mode determining unit 1062 is configured to determine the hybrid vehicle target driving mode based on the non-power angle as the current driving mode of the vehicle if the driver's required power is greater than or equal to the maximum power of the vehicle in the pure electric mode.

[0164] In the above-mentioned device of this embodiment, each module can borrow the specific steps of the method in the above-mentioned embodiment when executing the specific logic process. The device has the same technical effect as the above-mentioned method.

[0165] The present invention also provides a vehicle, comprising the above-mentioned method and device for determining a target driving mode of a hybrid vehicle.

[0166] The present invention also provides a control device, including a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the target driving mode determination method of the hybrid vehicle as described above are implemented.

[0167] The present invention further provides a readable storage medium storing a program or instruction. When the program or instruction is executed by a processor, the steps of the target driving mode determination method for a hybrid vehicle as described above are implemented.

[0168] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for determining a target driving mode of a hybrid vehicle, characterized in that: The hybrid vehicle comprises at least: a power battery, an engine, a drive motor, a generator, and a clutch. The engine can be coupled to or disconnected from the wheel end via the clutch. The drive motor is directly connected to the wheel end. The drive motor is connected to the power battery. The generator is connected to the engine. The generator is connected to the power battery and / or the drive motor. The method comprises: Obtain vehicle operating parameters; determining a driver demand power based on operating parameters of the vehicle; When the driver's power demand is identified according to the driver's demand power, the maximum power of the vehicle in the series mode and the parallel mode is determined based on the vehicle's operating parameters; Determining a target driving mode for the hybrid vehicle based on a dynamics perspective based on the vehicle's maximum power in series mode and parallel mode, respectively; The vehicle's operating parameters include: the maximum driving power of the drive motor at the current speed, the maximum power of the engine's external characteristics, the maximum power generated by the generator's external characteristics, and the battery's available driving power; The steps of determining the maximum power of the vehicle in series mode based on the operating parameters of the vehicle include: The sum is obtained by adding the smaller value of the maximum power of the engine external characteristics and the maximum power generated by the generator external characteristics and the available driving power of the battery; The smaller value between the sum and the maximum driving power of the driving motor at the current speed is determined as the maximum power of the vehicle in the series mode.

2. The method for determining the target driving mode of a hybrid vehicle according to claim 1, wherein: The method further comprises: When the driver's unpowered acceleration demand is identified according to the driver's demand power, the maximum power of the vehicle in pure electric mode is determined based on the vehicle's operating parameters; Based on the maximum power of the vehicle in pure electric mode and the power required by the driver, the target driving mode of the hybrid vehicle based on the non-dynamic perspective is determined.

3. The method for determining the target driving mode of a hybrid vehicle according to claim 1, wherein: The vehicle operating parameters include: vehicle speed, total speed ratio from engine to wheel end, tire diameter, maximum driving power of the drive motor at the current speed, and available driving power of the battery. The steps of determining the maximum power of the vehicle in the parallel mode based on the vehicle operating parameters include: Determine the maximum drive power at the target synchronous engine speed based on vehicle speed, engine-to-wheel speed ratio, and tire diameter; The maximum power of the vehicle in parallel mode is obtained by adding the smaller value of the maximum driving power of the drive motor at the current speed, the battery available driving power, and the maximum driving power of the engine target synchronous speed.

4. The method for determining a target driving mode of a hybrid vehicle according to claim 1, wherein: The steps of determining the maximum driving power at the target synchronous speed of the engine based on the vehicle speed, the total speed ratio from the engine to the wheel end, and the tire diameter include: Determine the synchronous engine speed based on the vehicle speed, the engine-to-wheel speed ratio, and the tire diameter; determining a rate of change of the engine synchronous speed based on the engine synchronous speed and the engine synchronous speed determined N preset cycles ago; determining a target synchronous speed of the engine based on the synchronous speed of the engine and the rate of change of the synchronous speed of the engine; Based on the target synchronous speed of the engine, the maximum driving power at the target synchronous speed of the engine is determined.

5. The method for determining the target driving mode of a hybrid vehicle according to claim 4, wherein: By formula: Spdequi=VehSpd*1000*η / 60 / π / D Calculate the engine synchronous speed Spdequi, where VehSpd is the vehicle speed, η is the total speed ratio from the engine to the wheel end, and D is the tire diameter.

6. The method for determining the target driving mode of a hybrid vehicle according to claim 4, wherein: By formula: Calculate the engine synchronous speed change rate SpdRate equi , Spde qui is the synchronous speed of the engine, is the synchronous speed of the engine N calculation cycles ago.

7. The method for determining a target driving mode of a hybrid vehicle according to claim 4, wherein: By formula: TgtSynSpd=Spdequi+SpdRateequi*δ Calculate the target engine synchronous speed TgtSynSpd, where Spdequi is the engine synchronous speed, SpdRateequi is the rate of change of the engine synchronous speed, δ is the prediction coefficient, and δ is the preset value.

8. The method for determining a target driving mode of a hybrid vehicle according to any one of claims 1 to 7, wherein: The vehicle's operating parameters also include: vehicle speed, accelerator pedal signal; The steps of determining the driver's required power based on the vehicle's operating parameters include: The driver demand power is determined based on the vehicle speed and the accelerator pedal signal.

9. The method for determining a target driving mode of a hybrid vehicle according to any one of claims 1 to 7, wherein: The specific process of identifying the driver's power acceleration demand based on the driver's demand power is as follows: If the power demanded by the driver is greater than the preset power, it is determined that the driver has a power acceleration demand; otherwise, it is determined that the driver has no power acceleration demand; The preset power is determined based on the vehicle speed and the actual SOC of the battery.

10. The method for determining a target driving mode of a hybrid vehicle according to claim 1, wherein: The steps of determining a target driving mode of the hybrid vehicle based on a dynamics perspective based on the maximum power of the vehicle in the series mode and the parallel mode include: If a difference between the maximum power of the vehicle in the series mode and the maximum power of the vehicle in the parallel mode is greater than a first predetermined difference, or if the maximum power of the vehicle in the series mode is greater than the maximum power of the vehicle in the parallel mode, determining that the target driving mode of the hybrid vehicle based on the dynamics perspective is the series mode; If the difference between the maximum power of the vehicle in parallel mode and the maximum power of the vehicle in series mode is greater than a second preset difference, or if the maximum power of the vehicle in parallel mode is greater than or equal to the maximum power of the vehicle in series mode, the target driving mode of the hybrid vehicle based on the dynamic perspective is determined to be the parallel mode.

11. The method for determining a target driving mode of a hybrid vehicle according to claim 2, wherein: The vehicle's operating parameters also include: the available driving power of the battery and the maximum driving power of the drive motor at the current speed; The steps of determining the maximum power of the vehicle in pure electric mode based on the operating parameters of the vehicle include: The smaller value between the available driving power of the battery and the maximum driving power of the driving motor at the current speed is determined as the maximum power of the vehicle in pure electric mode.

12. The method for determining a target driving mode of a hybrid vehicle according to claim 2 or 11, wherein: The steps of determining a target driving mode of the hybrid vehicle based on a non-power perspective based on the maximum power of the vehicle in pure electric mode and the power required by the driver include: If the driver's required power is less than the maximum power of the vehicle in the pure electric mode, the target driving mode of the hybrid vehicle based on the non-power perspective is determined to be the pure electric mode; If the driver's required power is greater than or equal to the maximum power of the vehicle in the pure electric mode, the hybrid vehicle target driving mode based on the non-power angle is determined as the current driving mode of the vehicle.

13. A device for determining a target driving mode of a hybrid vehicle, characterized in that: The hybrid vehicle at least includes: a power battery, an engine, a drive motor, a generator, and a clutch. The engine can be connected to or disconnected from the wheel end through the clutch. The drive motor is directly connected to the wheel end. The drive motor is connected to the power battery, the generator is connected to the engine, and the generator is connected to the power battery and / or the drive motor. The device includes: An acquisition module, used to obtain the operating parameters of the vehicle; a driver demand power determination module, configured to determine the driver demand power based on operating parameters of the vehicle; a first power determination module, configured to determine the maximum power of the vehicle in the series mode and the parallel mode respectively based on the operating parameters of the vehicle when the driver's power demand is identified as a power acceleration demand of the driver; a first target driving mode determination module, configured to determine a target driving mode of the hybrid vehicle based on a dynamics angle based on the maximum power of the vehicle in the series mode and the parallel mode; The vehicle's operating parameters include: the maximum driving power of the drive motor at the current speed, the maximum power of the engine's external characteristics, the maximum power generated by the generator's external characteristics, and the battery's available driving power; The first power determination module includes: a sum value determining unit, configured to add the smaller value of the maximum power of the engine external characteristics and the maximum power generated by the generator external characteristics to the available driving power of the battery to obtain a sum value; The series mode maximum power determination unit is used to determine the smaller value between the sum value and the maximum driving power of the driving motor at the current speed as the maximum power of the vehicle in the series mode.

14. The device for determining a target driving mode of a hybrid vehicle according to claim 13, wherein: The device further comprises: a second power determination module, configured to determine the maximum power of the vehicle in the pure electric mode based on the vehicle operating parameters when the driver's unpowered acceleration demand is identified according to the driver's demanded power; The second target driving mode determination module is configured to determine a target driving mode of the hybrid vehicle based on a non-power angle based on the maximum power of the vehicle in the pure electric mode and the power required by the driver.

15. The device for determining a target driving mode of a hybrid vehicle according to any one of claims 13 to 14, characterized in that: The first power determination module also includes: an engine target synchronous speed maximum driving power determination unit, configured to determine the engine target synchronous speed maximum driving power based on vehicle speed, engine-to-wheel end total speed ratio, and tire diameter; The parallel mode maximum power determination unit is used to add the smaller value of the maximum driving power of the driving motor at the current speed and the battery available driving power to the maximum driving power of the engine target synchronous speed to obtain the maximum power of the vehicle in parallel mode.

16. The device for determining a target driving mode of a hybrid vehicle according to claim 13, wherein: The first target driving mode determination module includes: a first target driving mode determining unit configured to determine that the target driving mode of the hybrid vehicle based on a dynamics perspective is the series mode if a difference between a maximum power of the vehicle in the series mode and a maximum power of the vehicle in the parallel mode is greater than a first predetermined difference, or if the maximum power of the vehicle in the series mode is greater than the maximum power of the vehicle in the parallel mode; The second target driving mode determination unit is configured to determine that the target driving mode of the hybrid vehicle based on the dynamic performance perspective is the parallel mode if a difference between the maximum power of the vehicle in the parallel mode and the maximum power of the vehicle in the series mode is greater than a second preset difference, or if the maximum power of the vehicle in the parallel mode is greater than or equal to the maximum power of the vehicle in the series mode.

17. The device for determining a target driving mode of a hybrid vehicle according to claim 14, wherein: The vehicle's operating parameters also include: the available driving power of the battery and the maximum driving power of the drive motor at the current speed; The second power determination module includes: The pure electric mode maximum power determination unit is used to determine the smaller value between the battery's available driving power and the maximum driving power of the driving motor at the current speed as the vehicle's maximum power in the pure electric mode.

18. The device for determining a target driving mode of a hybrid vehicle according to claim 14 or 17, wherein: The second target driving mode determination module includes: a third target driving mode determining unit, configured to determine the target driving mode of the hybrid vehicle based on the non-power angle to be the pure electric mode if the driver's required power is less than the maximum power of the vehicle in the pure electric mode; The fourth target driving mode determining unit is configured to determine the hybrid vehicle target driving mode based on the non-power angle as the current driving mode of the vehicle if the driver's required power is greater than or equal to the maximum power of the vehicle in the pure electric mode.

19. A vehicle, characterized in that: A device for determining a target driving mode of a hybrid vehicle comprising the device according to any one of claims 13 to 18.

20. A control device, characterized in that: The invention comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein when the program or instruction is executed by the processor, the steps of the target driving mode determination method for a hybrid vehicle according to any one of claims 1 to 12 are implemented.

21. A readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the steps of the target driving mode determination method for a hybrid vehicle according to any one of claims 1 to 12 are implemented.

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