Control method and device for four-wheel-drive hybrid electric vehicle

Abstract

The embodiment of the invention discloses a control method and device for a four-wheel-drive hybrid electric vehicle, and belongs to the technical field of hybrid electric vehicles. The method comprises the steps that the whole vehicle power supply state of a vehicle, the operation state of an engine, the front motor output power, the rear motor output power, the power battery charging and discharging state, the accelerator pedal opening degree, the brake pedal opening degree and a vehicle speed signal are obtained; and the working mode of the vehicle is controlled based on the whole vehicle power state, the operation state of the engine, the front motor output power, the rear motor output power, the power battery charging and discharging state, the accelerator pedal opening degree, the brake pedal opening degree and the vehicle speed signal, and therefore the working mode of the vehicle can be determined according to the operation state parameters of the vehicle. And the convenience of determining the working mode of the vehicle is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of hybrid electric vehicles, and in particular to a control method and device for a four-wheel drive hybrid electric vehicle. Background Art

[0002] With the development of energy technology, various types of hybrid vehicles are widely used, among which four-wheel drive hybrid vehicles are one type of hybrid vehicles. The four-wheel drive hybrid vehicle has multiple power sources such as an engine, a front motor, a rear motor and a power battery. When the four-wheel drive hybrid vehicle is controlled, the working states of the multiple power sources are different in different working modes. Therefore, how to determine the working states of the multiple power sources in the four-wheel drive hybrid vehicle becomes a necessity. Summary of the invention

[0003] The embodiment of the present application provides a control method and device for a four-wheel drive hybrid vehicle, which can determine the working status of multiple power sources in the four-wheel drive hybrid vehicle. The technical solution is as follows:

[0004] In one aspect, a control method for a four-wheel drive hybrid vehicle is provided, the method comprising:

[0005] Obtain the vehicle's power status, engine operating status, front motor output power, rear motor output power, power battery charge and discharge status, accelerator pedal opening, brake pedal opening and vehicle speed signal;

[0006] The operating mode of the vehicle is controlled based on the vehicle power status, the operating status of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging status of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal. The operating mode is used to indicate the operating status of the engine, front motor, power battery and rear motor in the vehicle.

[0007] In another aspect, a control device for a four-wheel drive hybrid vehicle is provided, the device comprising:

[0008] An acquisition module is used to acquire the vehicle power status, engine operation status, front motor output power, rear motor output power, power battery charge and discharge status, accelerator pedal opening, brake pedal opening and vehicle speed signal;

[0009] A control module is used to control the working mode of the vehicle based on the power status of the whole vehicle, the operating status of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging status of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal, wherein the working mode is used to indicate the working status of the engine, front motor, power battery and rear motor in the vehicle.

[0010] On the other hand, a computer device is provided, which includes one or more processors and one or more memories, wherein at least one instruction is stored in the one or more memories, and the instruction is loaded and executed by the one or more processors to implement the operations performed by the control method of the four-wheel drive hybrid vehicle.

[0011] On the other hand, a computer-readable storage medium is provided, on which instructions are stored, and when the instructions are executed by a processor, any step of the control method of the four-wheel drive hybrid vehicle is implemented.

[0012] On the other hand, a computer program product including instructions is provided, which, when executed on a terminal, enables the terminal to execute the control method of the four-wheel drive hybrid vehicle provided in the above embodiment.

[0013] The technical solution provided by the embodiments of the present application can at least bring the following beneficial effects:

[0014] In an embodiment of the present application, an operating mode corresponding to the operating status of the engine, front motor, power battery and rear motor in the vehicle can be determined based on the vehicle's overall power status, engine operating status, front motor output power, rear motor output power, power battery charging and discharging status, accelerator pedal opening, brake pedal opening and vehicle speed signals, and the vehicle can be controlled to operate in the corresponding operating mode, so that the vehicle's operating mode can be determined according to the vehicle's operating status parameters, thereby improving the convenience of determining the vehicle's operating mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a flow chart of a control method for a four-wheel drive hybrid vehicle provided in an embodiment of the present application;

[0017] Figure 2 is a flow chart of a control method for a four-wheel drive hybrid vehicle provided by an embodiment of the present application;

[0018] Figure 3-Figure 18 The energy flow model diagrams corresponding to the working modes are shown in Figure 2.

[0019] Fig.19 It is a structural schematic diagram of a control device for a four-wheel drive hybrid vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0021] Before explaining in detail the control method of the four-wheel drive hybrid vehicle provided in the embodiment of the present application, the four-wheel drive hybrid vehicle provided in the embodiment of the present application is first introduced.

[0022] The four-wheel drive hybrid vehicle in the present application has multiple power sources including an engine, a front motor, a rear motor and a power battery. The engine is connected to the front wheels of the vehicle, the front motor is connected to the front wheels of the vehicle and the power battery respectively, and the rear motor is connected to the rear wheels of the vehicle and the power battery respectively. The front motor may include a generator and a drive motor. The engine may drive the front wheels of the vehicle and may also charge the power battery. When the engine charges the power battery, the generator in the front motor charges the power battery. The drive motor in the front motor is used to drive the front wheels of the vehicle, and the rear motor is used to drive the rear wheels of the vehicle. The power battery is used to provide electrical energy to at least one of the front motor and the rear motor.

[0023] Figure 1 This is a flow chart of a control method for a four-wheel drive hybrid vehicle provided in an embodiment of the present application. The method can be applied to a vehicle controller of the vehicle. The method comprises the following steps:

[0024] Step 101, obtaining the vehicle power status, engine operating status, front motor output power, rear motor output power, power battery charge and discharge status, accelerator pedal opening, brake pedal opening and vehicle speed signal.

[0025] Step 102, based on the vehicle power status, engine operating status, front motor output power, rear motor output power, power battery charge and discharge status, accelerator pedal opening, brake pedal opening and vehicle speed signal, control the vehicle's operating mode, the operating mode is used to indicate the operating status of the engine, front motor, power battery and rear motor in the vehicle.

[0026] In an embodiment of the present application, an operating mode corresponding to the operating status of the engine, front motor, power battery and rear motor in the vehicle can be determined based on the vehicle's overall power status, engine operating status, front motor output power, rear motor output power, power battery charging and discharging status, accelerator pedal opening, brake pedal opening and vehicle speed signals, and the vehicle can be controlled to operate in the corresponding operating mode, so that the vehicle's operating mode can be determined according to the vehicle's operating status parameters, thereby improving the convenience of determining the vehicle's operating mode.

[0027] Figure 2This is a flow chart of a control method for a four-wheel drive hybrid vehicle provided in an embodiment of the present application. The method can be applied to a vehicle controller of the vehicle. The method comprises the following steps:

[0028] Step 201, obtaining the vehicle power status, engine operating status, front motor output power, rear motor output power, power battery charge and discharge status, accelerator pedal opening, brake pedal opening and vehicle speed signal.

[0029] Among them, the vehicle power supply status includes: the vehicle is powered on and the high voltage is not powered on, and the vehicle is powered on and the high voltage is powered on. If the vehicle is powered on and the high voltage is not powered on, the vehicle's electrical system is activated, but the engine is not started. At this time, the electrical equipment in the vehicle, such as air conditioning, audio, etc., can work normally, but the vehicle has no driving torque output and the vehicle cannot be driven. If the vehicle is powered on and the high voltage is powered on, the vehicle can be used to drive in gear.

[0030] The engine operating status includes: engine started, engine not started, and engine stopped. Engine not started means that the engine has not started working, engine started means that the engine starts working, and engine stopped means automatically monitoring the engine operating status and automatically shutting down the engine under certain conditions.

[0031] The power battery charging and discharging states include: power battery standby state, power battery unplugged charging, power battery charging and power battery discharging.

[0032] Step 202, based on the vehicle power status, engine operating status, front motor output power, rear motor output power, power battery charge and discharge status, accelerator pedal opening, brake pedal opening and vehicle speed signal, controls the vehicle's operating mode. The operating mode is used to indicate the operating status of the engine, front motor, power battery and rear motor in the vehicle.

[0033] The following will describe in detail each of the vehicle's operating modes.

[0034] Inactive mode:

[0035] If the vehicle's operating mode is the inactive mode, the engine, front motor, power battery and rear motor will not work;

[0036] Ready to drive mode:

[0037] If the vehicle's operating mode is the driving ready mode, the engine, front motor and rear motor do not work, and the power battery is in standby mode.

[0038] Four-wheel drive pure electric driving mode:

[0039] If the vehicle is in the four-wheel drive pure electric drive mode, the engine is not working, the front motor and the rear motor are working, the power battery is discharging, and the power battery is discharging to the front motor and the rear motor. The front motor and the rear motor are working, which means that the torque is output from the front motor to the front wheels and the rear motor to the rear wheels respectively.

[0040] Four-wheel drive extended range discharge mode:

[0041] If the vehicle's operating mode is the four-wheel drive extended-range discharge mode, the engine charges the power battery, the front motor and the rear motor work, and the power battery discharges to the front motor and the rear motor.

[0042] Four-wheel drive extended range charging mode:

[0043] If the vehicle's operating mode is the four-wheel drive extended-range charging mode, the engine charges the power battery and the power battery discharges to the rear motor; the front motor and the rear motor work.

[0044] It should be noted that the engine charging the power battery means that the engine charges the power battery through the generator in the front motor, and the front motor and rear motor working means that the torque is output by the drive motor in the front motor to the front wheels and the rear motor to the rear wheels respectively. The electric energy used by the drive motor in the front motor is provided by the generator in the front motor.

[0045] Four-wheel drive rear axle extended range discharge mode:

[0046] If the vehicle's operating mode is the four-wheel drive rear axle extended-range discharge mode, the engine charges the power battery through the front motor, the power battery is discharging, the power battery is discharging to the rear motor, and the rear motor outputs torque to the rear wheels.

[0047] Four-wheel drive rear axle extended range charging mode:

[0048] If the vehicle's operating mode is the four-wheel drive rear axle extended-range charging mode, the engine charges the power battery through the front motor, the power battery is charging, the power battery discharges to the rear motor, and the rear motor outputs torque to the rear wheels.

[0049] Four-wheel drive parallel drive mode:

[0050] If the vehicle's operating mode is four-wheel drive parallel drive mode, the power battery is discharging, the power battery is discharged to the rear motor and the front motor, the torque is output by the engine to the front wheels, the front motor to the front wheels, and the rear motor to the rear wheels, and there is no charging current.

[0051] Direct drive mode:

[0052] If the vehicle's operating mode is direct drive mode, the power battery is discharging, the power battery is discharged to the rear motor, the torque is output by the engine to the front wheels and the rear motor to the rear wheels respectively, and there is no charging current.

[0053] Driving power generation mode:

[0054] If the vehicle's operating mode is driving power generation mode, the power battery is in discharge, the power battery is discharged to the rear motor, the engine charges the power battery through the front motor, and the torque is output by the engine to the front wheels and the rear motor to the rear wheels respectively.

[0055] Parking power generation mode:

[0056] If the vehicle's operating mode is parking power generation mode, the power battery is being charged, the engine charges the power battery through the front motor, and there is no discharge current and output torque.

[0057] Four-wheel drive regenerative braking mode:

[0058] If the vehicle's operating mode is four-wheel drive regenerative braking mode, the power battery is charging, the engine charges the power battery through the front motor, the rear motor charges the power battery, there is no discharge current, and the torque is output by the front motor to the front wheels and the rear motor to the rear wheels respectively.

[0059] Rear axle pure electric drive mode:

[0060] If the vehicle's operating mode is the rear axle pure electric drive mode, the power battery is in discharge, the power battery is discharged to the rear motor, and the torque is output by the rear motor to the rear wheels.

[0061] Four-wheel drive rear axle feedback braking mode:

[0062] If the vehicle's operating mode is the four-wheel drive rear axle regenerative braking mode, the power battery is being charged, the rear motor charges the power battery, and the torque is output by the rear motor to the rear wheels.

[0063] Deceleration charging mode:

[0064] If the vehicle's operating mode is deceleration charging mode, the power battery is charging, the engine charges the power battery through the front motor, the rear motor charges the power battery, and the torque is output by the front motor to the front wheels and the rear motor to the rear wheels respectively.

[0065] External charging mode:

[0066] If the vehicle's operating mode is external charging mode, the power battery is in charging, with no discharge current or torque output.

[0067] In an embodiment of the present application, if the vehicle power status indicates that the vehicle is not powered on, the vehicle's operating mode is determined to be an inactive mode, and the vehicle is controlled to operate in the inactive mode.

[0068] In an embodiment of the present application, if the vehicle power status indicates that the vehicle is powered on and the high voltage is not powered on, the sum of the front motor output power and the rear motor output power is less than a first threshold, the power battery charge and discharge status indicates that the vehicle is not plugged in for charging, and the engine operating status indicates that the engine is not started, then the vehicle's operating mode is determined to be the driving ready mode, and the vehicle is controlled to operate in the driving ready mode.

[0069] In an embodiment of the present application, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine operating status indicates that the engine is not started, the front motor output power is greater than the first threshold, the rear motor output power is greater than the first threshold, and the power battery charge and discharge status indicates that the output current of the power battery is greater than the second threshold, then the vehicle's operating mode is determined to be a four-wheel drive pure electric drive mode, and the vehicle is controlled to operate in the four-wheel drive pure electric drive mode.

[0070] The first threshold and the second threshold are preset, and the first threshold and the second threshold can be 0 respectively.

[0071] In an embodiment of the present application, in the series mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, and the engine operating status indicates that the engine is started, the vehicle's operating mode is determined based on the output power of the drive motor, the output power of the rear motor, and the charging and discharging status of the power battery.

[0072] Series mode means that the engine and the drive motor work in series.

[0073] Among them, in the series mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on and the engine running status indicates that the engine is started, the vehicle's working mode is determined based on the output power of the drive motor, the output power of the rear motor and the charging and discharging status of the power battery, including:

[0074] In the series mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine running status indicates that the engine is started, the output power of the drive motor is greater than the first threshold and the output power of the rear motor is greater than the first threshold, and the power battery charge and discharge status indicates that the output current of the power battery is greater than the second threshold, then the vehicle's operating mode is determined to be the four-wheel drive extended-range discharge mode, and the vehicle is controlled to operate in the four-wheel drive extended-range discharge mode.

[0075] In the series mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine running status indicates that the engine is started, the output power of the drive motor is greater than the first threshold, the output power of the rear motor is greater than the first threshold, and the power battery charging and discharging status indicates that the output current of the power battery is less than the second threshold, then the vehicle's operating mode is determined to be the four-wheel drive extended-range discharge mode; the vehicle is controlled to operate in the four-wheel drive extended-range charging mode.

[0076] In the series mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine running status indicates that the engine is started, the output power of the drive motor is equal to the first threshold, the output power of the rear motor is greater than the first threshold, and the power battery charge and discharge status indicates that the output current of the power battery is greater than the second threshold, then the vehicle's operating mode is determined to be the four-wheel drive rear axle extended-range discharge mode; the vehicle is controlled to operate in the four-wheel drive rear axle extended-range discharge mode.

[0077] In the series mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine running status indicates that the engine is started, the output power of the drive motor is equal to the first threshold, the output power of the rear motor is greater than the first threshold, and the power battery charging and discharging status indicates that the output current of the power battery is less than the second threshold, then the vehicle's operating mode is determined to be the four-wheel drive rear axle extended-range charging mode; the vehicle is controlled to operate in the four-wheel drive rear axle extended-range charging mode.

[0078] In an embodiment of the present application, the front motor includes: a generator and a drive motor.

[0079] In an embodiment of the present application, in parallel mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on and the engine operating status indicates that the engine is started, the vehicle operating mode is determined based on the output power of the generator and the output power of the drive motor.

[0080] Parallel mode means that the engine and the drive motor work in parallel.

[0081] Among them, in the parallel mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on and the engine running status indicates that the engine is started, the vehicle working mode is determined based on the output power of the generator and the output power of the drive motor, including:

[0082] In parallel mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine running status indicates that the engine is started, the power battery charging and discharging status indicates that the output current of the power battery is greater than the second threshold, the output power of the drive motor is greater than the first threshold, and the output power of the generator is not less than the first threshold, the vehicle's working mode is determined to be the four-wheel drive parallel drive mode; the vehicle is controlled to operate in the four-wheel drive parallel drive mode.

[0083] In parallel mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine running status indicates that the engine is started, the power battery charging and discharging status indicates that the output current of the power battery is greater than the second threshold, the output power of the drive motor is equal to the first threshold and the output power of the generator is equal to the first threshold, the vehicle's working mode is determined to be direct drive mode; the vehicle is controlled to operate in direct drive mode.

[0084] In parallel mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine operating status indicates that the engine is started, the vehicle speed indicated by the vehicle speed signal is greater than the third threshold, and the sum of the output power of the drive motor and the output power of the generator is less than the first threshold, the vehicle's operating mode is determined to be the driving power generation mode; the vehicle is controlled to operate in the driving power generation mode.

[0085] In parallel mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine operating status indicates that the engine is started, the vehicle speed indicated by the vehicle speed signal is equal to the third threshold, and the sum of the output power of the drive motor and the output power of the generator is not greater than the first threshold, the vehicle's operating mode is determined to be the parking power generation mode; the vehicle is controlled to operate in the parking power generation mode.

[0086] The third threshold is pre-set and may be 0.

[0087] In an embodiment of the present application, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, and the engine operating status indicates that the engine is stopped, the vehicle operating mode is determined based on the output power of the generator, the output power of the drive motor and the output power of the rear motor.

[0088] If the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on and the engine operation status indicates that the engine is stopped, the vehicle operation mode is determined based on the output power of the generator, the output power of the drive motor and the output power of the rear motor, including:

[0089] If the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine running status indicates that the engine is stopped, the sum of the output power of the drive motor and the output power of the generator is less than the first threshold, the output power of the rear motor is less than the first threshold, and the power battery charge and discharge status indicates that the output current of the power battery is less than the second threshold, the vehicle's working mode is determined to be the four-wheel drive regenerative braking mode; the vehicle is controlled to operate in the four-wheel drive regenerative braking mode.

[0090] If the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine operating status indicates that the engine is shut down, the sum of the output power of the drive motor and the output power of the generator is equal to the first threshold, and the output power of the rear motor is greater than the first threshold, the vehicle's operating mode is determined to be the four-wheel drive rear axle pure electric drive mode; the vehicle is controlled to operate in the four-wheel drive rear axle pure electric drive mode.

[0091] If the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine operating status indicates that the engine is stopped, the sum of the output power of the drive motor and the output power of the generator is equal to the first threshold, and the output power of the rear motor is less than the first threshold, the vehicle's operating mode is determined to be the four-wheel drive rear axle feedback braking mode; the vehicle is controlled to operate in the four-wheel drive rear axle feedback braking mode.

[0092] In an embodiment of the present application, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine operating status indicates that the engine is started, the accelerator pedal opening is a first threshold, the brake pedal opening indicates that the brake pedal is not pressed, and the vehicle speed signal indicates that the vehicle speed is greater than the first threshold, then the vehicle's operating mode is determined to be a deceleration charging mode.

[0093] In an embodiment of the present application, if the power battery charging and discharging status indicates that the vehicle is plugged in for charging, the vehicle's operating mode is determined to be an external charging mode, wherein the external charging mode includes fast charging and slow charging.

[0094] Step 203: Generate an energy flow model diagram based on the working mode of the vehicle.

[0095] Among them, the energy flow model diagram is used to represent the working status of different power sources and the transmission direction of the energy flow signal.

[0096] In the embodiments of the present application, Figure 3-Figure 18 The energy flow model diagrams corresponding to the working modes are shown in Figure 2. Among them, the energy flow model diagram corresponding to the inactive mode can be found in Figure 2. Figure 3 ; The energy flow model diagram corresponding to the driving ready mode can be found in Figure 4 ; The energy flow model diagram corresponding to the four-wheel drive pure electric drive mode can be found in Figure 5 ; The energy flow model diagram corresponding to the four-wheel drive extended range discharge mode can be found in Figure 6 ; The energy flow model diagram corresponding to the four-wheel drive extended range charging mode can be found in Figure 7 ; The energy flow model diagram corresponding to the four-wheel drive parallel drive mode can be found in Figure 8 ; The energy flow model diagram corresponding to the direct drive mode can be found in Fig. 9 ; The energy flow model diagram corresponding to the driving power generation mode can be found in Fig.10 ; The energy flow model diagram corresponding to the parking power generation mode can be found in Fig.11 ; The energy flow model diagram corresponding to the four-wheel drive regenerative braking mode can be found in Fig.12 ; The energy flow model diagram corresponding to the external charging mode can be found in Fig.13 ; The energy flow model diagram corresponding to the deceleration charging mode can be found in Fig.14 ; The energy flow model diagram corresponding to the rear axle pure electric drive mode can be found in Fig.15 ; The energy flow model diagram corresponding to the four-wheel drive rear axle extended range charging mode can be found in Fig.16 ; The energy flow model diagram corresponding to the four-wheel drive rear axle extended range discharge mode can be found in Fig.17 ; The energy flow model diagram corresponding to the four-wheel drive rear axle feedback braking mode can be found in Fig.18 .

[0097] It should be noted that Figure 3-Figure 8 The direction of the arrow in the figure indicates the transmission direction of the energy flow signal. Figure 3-Figure 8A power source with a gray background indicates that the power source is in working state.

[0098] In an embodiment of the present application, different power sources in working state in the energy flow model diagram may be marked with different colors.

[0099] Step 204 , displaying the energy flow model diagram via the display screen of the vehicle.

[0100] In the embodiment of the present application, the energy flow model corresponding to different working states can be preset, so that the corresponding energy flow model can be found according to the corresponding working state, and the energy flow model can be displayed on the real screen through the cockpit domain. The energy flow model value corresponding to each power source can also be determined according to the working state, and the corresponding energy flow model value can be transmitted to the cockpit domain. The cockpit domain maps the received energy flow model signal value to the corresponding model and displays the energy flow model diagram on the screen.

[0101] In an embodiment of the present application, an operating mode corresponding to the operating status of the engine, front motor, power battery and rear motor in the vehicle can be determined based on the vehicle's overall power status, engine operating status, front motor output power, rear motor output power, power battery charging and discharging status, accelerator pedal opening, brake pedal opening and vehicle speed signals, and the vehicle can be controlled to operate in the corresponding operating mode, so that the vehicle's operating mode can be determined according to the vehicle's operating status parameters, thereby improving the convenience of determining the vehicle's operating mode.

[0102] Fig.19 is a schematic diagram of the structure of a control device for a four-wheel drive hybrid vehicle provided by an embodiment of the present application. The control device for the four-wheel drive hybrid vehicle can be implemented by software, hardware or a combination of both. Fig.19 The device includes: an acquisition module 301 and a control module 302.

[0103] The acquisition module 301 is used to acquire the vehicle power state, engine operation state, front motor output power, rear motor output power, power battery charge and discharge state, accelerator pedal opening, brake pedal opening and vehicle speed signal of the vehicle;

[0104] The control module 302 is used to control the vehicle's operating mode based on the vehicle's power status, the engine's operating status, the front motor's output power, the rear motor's output power, the power battery's charging and discharging status, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal. The operating mode is used to indicate the operating status of the engine, front motor, power battery and rear motor in the vehicle.

[0105] Optionally, the device further comprises:

[0106] A generation module, used for generating an energy flow model diagram based on a working mode of the vehicle;

[0107] The display module is used to display the energy flow model diagram through the display screen of the vehicle.

[0108] Optionally, the control module 302 includes:

[0109] The first determination submodule is used to determine that the working mode of the vehicle is an inactive mode if the vehicle power status indicates that the vehicle is not powered on; the inactive mode is used to indicate that the engine, the front motor, the power battery and the rear motor are not working;

[0110] Controls the vehicle to operate in inactive mode.

[0111] Optionally, the control module 302 includes:

[0112] The second determination submodule is used to determine that the working mode of the vehicle is a driving-ready mode if the vehicle power state indicates that the vehicle is powered on and the high voltage is not powered on, the sum of the output power of the front motor and the output power of the rear motor is less than a first threshold, the power battery charge and discharge state indicates that the vehicle is not plugged in for charging, and the engine operation state indicates that the engine is not started; the driving-ready mode is used to indicate that the engine, the front motor and the rear motor are not working, and the power battery is in a standby state;

[0113] The first control submodule is used to control the vehicle to run in a driving ready mode.

[0114] Optionally, the control module 302 includes:

[0115] The third determination submodule is used to determine that the working mode of the vehicle is a four-wheel drive pure electric drive mode if the vehicle power state indicates that the vehicle is powered on and the high voltage is powered on, the engine running state indicates that the engine is not started, the front motor output power is greater than the first threshold, the rear motor output power is greater than the first threshold, and the power battery charge and discharge state indicates that the output current of the power battery is greater than the second threshold; the four-wheel drive pure electric drive is used to indicate that the engine is not working, the front motor and the rear motor are working, and the power battery is discharged to the front motor and the rear motor;

[0116] The second control submodule is used to control the vehicle to operate in a four-wheel drive pure electric drive mode.

[0117] Optionally, the control module 302 includes:

[0118] The fourth determination submodule is used to control the working mode of the vehicle in the series mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on and the engine running status indicates that the engine is started, based on the output power of the drive motor, the output power of the rear motor and the charging and discharging status of the power battery. The series mode means that the engine and the drive motor work in series.

[0119] Optionally, the control module 302 includes:

[0120] The fifth determination submodule is used to control the vehicle's operating mode in parallel mode based on the output power of the generator and the output power of the drive motor if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on and the engine's operating status indicates that the engine is started. The parallel mode means that the engine and the drive motor work in parallel.

[0121] Optionally, the front motor includes: a generator and a drive motor; the control module 302 includes:

[0122] The sixth determination submodule is used to control the vehicle's operating mode based on the output power of the generator, the output power of the drive motor and the output power of the rear motor if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on and the engine's operating status indicates that the engine is stopped.

[0123] Optionally, the control module 302 includes:

[0124] The seventh determination submodule is used to determine that the vehicle's operating mode is a deceleration charging mode if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine's operating status indicates that the engine is started, the accelerator pedal opening is a first threshold, the brake pedal opening indicates that the brake pedal is not pressed, and the vehicle speed signal indicates that the vehicle speed is greater than the first threshold. The deceleration charging mode is that the power battery is charging, the engine charges the power battery through the front motor, the rear motor charges the power battery, and the torque is output by the front motor to the front wheels and the rear motor to the rear wheels respectively.

[0125] In an embodiment of the present application, an operating mode corresponding to the operating status of the engine, front motor, power battery and rear motor in the vehicle can be determined based on the vehicle's overall power status, engine operating status, front motor output power, rear motor output power, power battery charging and discharging status, accelerator pedal opening, brake pedal opening and vehicle speed signals, and the vehicle can be controlled to operate in the corresponding operating mode, so that the vehicle's operating mode can be determined according to the vehicle's operating status parameters, thereby improving the convenience of determining the vehicle's operating mode.

[0126] It should be noted that: the control device of the four-wheel drive hybrid vehicle provided in the above embodiment only uses the division of the above functional modules as an example to illustrate when controlling the working mode of the vehicle. In actual application, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the computer device is divided into different functional modules to complete all or part of the functions described above. In addition, the control device of the four-wheel drive hybrid vehicle provided in the above embodiment and the control method embodiment of the four-wheel drive hybrid vehicle belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0127] An embodiment of the present application also provides a computer device, which includes one or more processors and one or more memories, wherein at least one instruction is stored in the one or more memories, and the instruction is loaded and executed by the one or more processors to implement the operations performed by the control method of the four-wheel drive hybrid vehicle.

[0128] The embodiment of the present application also provides a computer-readable storage medium, in which at least one instruction is stored. The instruction is loaded and executed by a processor to implement the operations performed by the control method of a four-wheel drive hybrid vehicle.

[0129] The embodiment of the present application also provides a computer program product including instructions, which, when executed on a terminal, enables the terminal to execute the control method of the four-wheel drive hybrid vehicle provided in the above embodiment.

[0130] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0131] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A control method for a four-wheel drive hybrid vehicle, characterized in that: The method comprises: Obtain the vehicle's power status, engine operating status, front motor output power, rear motor output power, power battery charge and discharge status, accelerator pedal opening, brake pedal opening and vehicle speed signal; The operating mode of the vehicle is controlled based on the vehicle power status, the operating status of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging status of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal. The operating mode is used to indicate the operating status of the engine, front motor, power battery and rear motor in the vehicle.

2. The method according to claim 1, characterized in that The method further comprises: Based on the working mode of the vehicle, generating an energy flow model diagram; The energy flow model diagram is displayed via a display screen of the vehicle.

3. The method according to claim 1, characterized in that The control of the working mode of the vehicle based on the vehicle power state, the running state of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging state of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal includes: If the vehicle power status indicates that the vehicle is not powered on, the working mode of the vehicle is determined to be an inactive mode; the inactive mode is used to indicate that the engine, the front motor, the power battery and the rear motor are not working; The vehicle is controlled to operate in the deactivated mode.

4. The method according to claim 1, characterized in that The control of the working mode of the vehicle based on the vehicle power state, the running state of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging state of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal includes: If the vehicle power supply status indicates that the vehicle is powered on and the high voltage is not powered on, the sum of the output power of the front motor and the output power of the rear motor is less than a first threshold, the power battery charge and discharge status indicates that the vehicle is not plugged in for charging, and the engine operation status indicates that the engine is not started, then it is determined that the working mode of the vehicle is a driving ready mode; the driving ready mode is used to indicate that the engine, the front motor and the rear motor are not working, and the power battery is in a standby state; The vehicle is controlled to operate in the driving-ready mode.

5. The method according to claim 1, characterized in that The control of the working mode of the vehicle based on the vehicle power state, the running state of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging state of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal includes: If the vehicle power supply status indicates that the vehicle is powered on and the high voltage is powered on, the engine operation status indicates that the engine is not started, the output power of the front motor is greater than a first threshold, the output power of the rear motor is greater than the first threshold, and the power battery charge and discharge status indicates that the output current of the power battery is greater than a second threshold, then it is determined that the working mode of the vehicle is a four-wheel drive pure electric drive mode; the four-wheel drive pure electric drive is used to indicate that the engine is not working, the front motor and the rear motor are working, the power battery is discharging, and the power battery is discharging to the front motor and the rear motor; The vehicle is controlled to operate in the four-wheel drive pure electric drive mode.

6. The method according to claim 1, characterized in that The front motor includes: a generator and a drive motor; the working mode of the vehicle is controlled based on the power supply state of the whole vehicle, the running state of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging state of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal, including: In the series mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on and the engine running status indicates that the engine is started, the working mode of the vehicle is controlled based on the output power of the drive motor, the output power of the rear motor and the charging and discharging status of the power battery. The series mode means that the engine and the drive motor work in series.

7. The method according to claim 1, characterized in that The front motor includes: a generator and a drive motor; the working mode of the vehicle is controlled based on the power supply state of the whole vehicle, the running state of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging state of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal, including: In parallel mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on and the engine operating status indicates that the engine is started, the operating mode of the vehicle is controlled based on the output power of the generator and the output power of the drive motor. The parallel mode means that the engine and the drive motor work in parallel.

8. The method according to claim 1, characterized in that The front motor includes: a generator and a drive motor; the working mode of the vehicle is controlled based on the power supply state of the whole vehicle, the running state of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging state of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal, including: If the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on and the engine operating status indicates that the engine is stopped, the operating mode of the vehicle is controlled based on the output power of the generator, the output power of the drive motor and the output power of the rear motor.

9. The method according to claim 1, characterized in that The control of the working mode of the vehicle based on the vehicle power state, the running state of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging state of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal includes: If the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine operating status indicates that the engine is started, the accelerator pedal opening is a first threshold, the brake pedal opening indicates that the brake pedal is not pressed, and the vehicle speed signal indicates that the vehicle speed is greater than the first threshold, then the vehicle operating mode is determined to be a deceleration charging mode, and the deceleration charging mode is that the power battery is charging, the engine charges the power battery through the front motor, the rear motor charges the power battery, and the torque is output by the front motor to the front wheels and the rear motor to the rear wheels respectively.

10. A control device for a four-wheel drive hybrid vehicle, characterized in that: The device comprises: An acquisition module is used to acquire the vehicle power status, engine operation status, front motor output power, rear motor output power, power battery charge and discharge status, accelerator pedal opening, brake pedal opening and vehicle speed signal; A control module is used to control the working mode of the vehicle based on the power status of the whole vehicle, the operating status of the engine, the output power of the front motor, the output power of the rear motor, the charging and discharging status of the power battery, the accelerator pedal opening, the brake pedal opening and the vehicle speed signal, wherein the working mode is used to indicate the working status of the engine, front motor, power battery and rear motor in the vehicle.

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