Control method and device for a four-wheel hybrid vehicle

Abstract

This application discloses a control method and device for a four-wheel drive hybrid vehicle, belonging to the field of hybrid vehicle technology. The method includes: acquiring the vehicle's overall power status, engine operating status, front motor output power, rear motor output power, power battery charging / discharging status, accelerator pedal opening, brake pedal opening, and vehicle speed signal; based on the vehicle's overall power status, engine operating status, front motor output power, rear motor output power, power battery charging / discharging status, accelerator pedal opening, brake pedal opening, and the vehicle speed signal, controlling the vehicle's operating mode, thereby determining the vehicle's operating mode based on the vehicle's operating status parameters, improving the convenience of determining the vehicle's operating mode.

Description

Technical Field

[0001] This application relates to the field of hybrid vehicle technology, and in particular to a control method and apparatus for a four-wheel drive hybrid vehicle. Background Technology

[0002] With the development of energy technology, various hybrid vehicles have been widely used, among which four-wheel drive hybrid vehicles are a type of hybrid vehicle. These four-wheel drive hybrid vehicles have multiple power sources, including an engine, a front motor, a rear motor, and a power battery. When controlling a four-wheel drive hybrid vehicle, the operating states of these multiple power sources differ depending on the operating mode. Therefore, determining the operating states of the multiple power sources in a four-wheel drive hybrid vehicle becomes essential. Summary of the Invention

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

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

[0005] Acquire 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 signal.

[0006] 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 vehicle's operating mode is controlled. The operating mode is used to indicate the operating status of the engine, front motor, power battery, and rear motor in the vehicle.

[0007] On the other hand, a control device for a four-wheel drive hybrid vehicle is provided, the device comprising:

[0008] The acquisition module is used to acquire 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 signal.

[0009] The control module is used to control the operating mode of the vehicle based on the vehicle power status, the engine operating status, the front motor output power, the rear motor output power, the power battery 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.

[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, the instruction being loaded and executed by the one or more processors to implement the operation 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, which, when executed by a processor, implement any step in the control method for the four-wheel drive hybrid vehicle described above.

[0012] On the other hand, a computer program product containing instructions is provided, which, when run on a terminal, causes the terminal to execute the control method for the four-wheel drive hybrid vehicle provided in the above embodiments.

[0013] The technical solutions provided in this application can bring at least the following beneficial effects:

[0014] In this embodiment, the operating mode corresponding to the working 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 signal. The vehicle is then controlled to operate in the corresponding operating mode, thereby improving the convenience of determining the vehicle's operating mode by determining the vehicle's operating status parameters. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of a control method for a four-wheel drive hybrid vehicle provided in an embodiment of this application;

[0017] Figure 2 This is a flowchart of a control method for a four-wheel drive hybrid vehicle provided in an embodiment of this application;

[0018] Figures 3-18 The diagram shows the energy flow model corresponding to each working mode;

[0019] Figure 19 This is a schematic diagram of the structure of a control device for a four-wheel drive hybrid vehicle provided in an embodiment of this application. Detailed Implementation

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

[0021] Before providing a detailed explanation of the control method for the four-wheel drive hybrid vehicle provided in the embodiments of this application, the four-wheel drive hybrid vehicle provided in the embodiments of this application will be introduced first.

[0022] The four-wheel drive hybrid vehicle of this 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 both the front wheels and the power battery, and the rear motor is connected to both the rear wheels and the power battery. The front motor may include a generator and a drive motor. The engine can drive the front wheels of the vehicle and also charge the power battery. When the engine charges the power battery, it does so through the generator in the front motor. The drive motor in the front motor drives the front wheels of the vehicle, the rear motor drives the rear wheels, and the power battery provides electrical energy to at least one of the front and rear motors.

[0023] Figure 1 This is a flowchart of a control method for a four-wheel drive hybrid vehicle provided in an embodiment of this application. The method can be applied in the vehicle controller and includes the following steps:

[0024] Step 101: Obtain 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 signal.

[0025] Step 102: Based on the vehicle's 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 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 this embodiment, the operating mode corresponding to the working 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 signal. The vehicle is then controlled to operate in the corresponding operating mode, thereby improving the convenience of determining the vehicle's operating mode by determining the vehicle's operating status parameters.

[0027] Figure 2This is a flowchart of a control method for a four-wheel drive hybrid vehicle provided in an embodiment of this application. The method can be applied in the vehicle controller and includes the following steps:

[0028] Step 201: Obtain 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 signal.

[0029] The vehicle's power status includes: vehicle powered on but high voltage not powered on, and vehicle powered on and high voltage powered on. If the vehicle is powered on but high voltage is not powered on, the vehicle's electrical system is activated, but the engine does not start. At this time, in-vehicle electrical equipment such as air conditioning and audio systems can work normally, but the vehicle has no driving torque output and cannot move. If the vehicle is powered on and high voltage is powered on, the vehicle can be used to engage gears and drive.

[0030] The engine's operating status includes: engine started, engine not started, and engine stopped. Engine not started means that the engine has not yet started working. Engine started means that the engine has started working. Engine stopped means that the engine is automatically monitored for operating status and automatically shuts down the engine under certain conditions.

[0031] The charging and discharging states of a power battery include: standby state, charging without plugging in the charging gun, charging, and discharging.

[0032] Step 202: Based on the vehicle's 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 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.

[0033] The following section will elaborate on each of the vehicle's operating modes.

[0034] Inactive mode:

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

[0036] Driving Ready Mode:

[0037] If the vehicle is in driving ready mode, the engine, front motor, and rear motor are not working, and the power battery is in standby mode.

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

[0039] If the vehicle is operating in four-wheel drive pure electric mode, the engine is off, the front and rear motors are working, the battery is discharging, and the battery is discharging to the front and rear motors. The front and rear motors working means that torque is output from the front motor to the front wheels and from the rear motor to the rear wheels, respectively.

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

[0041] If the vehicle is in four-wheel drive range extender discharge mode, the engine charges the power battery, the front and rear motors operate, and the power battery discharges to the front and rear motors.

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

[0043] If the vehicle is in four-wheel drive range extender charging mode, the engine charges the power battery and the power battery discharges to the rear motor; the front motor and the rear motor are working.

[0044] It should be noted that "engine charging the battery" means that the engine charges the battery through the generator in the front motor. "Front motor and rear motor operating" means that torque is output from the drive motor in the front motor to the front wheels and from the rear motor to the rear wheels, respectively. The electrical energy used by the drive motor in the front motor is provided by the generator within the front motor.

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

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

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

[0048] If the vehicle is operating in four-wheel drive rear axle range extender 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 is operating in four-wheel drive parallel drive mode, the power battery is discharging, the power battery is discharging to the rear motor and the front motor, the torque is output from 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 is in direct drive mode, the power battery is discharging, the power battery is discharging to the rear motor, the torque is output from the engine to the front wheels and from the rear motor to the rear wheels, and there is no charging current.

[0053] Vehicle power generation mode:

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

[0055] Parking power generation mode:

[0056] If the vehicle is in parking power generation mode, the power battery is charging, the engine charges the power battery through the front motor, and there is no discharge current or output torque.

[0057] Four-wheel drive regenerative braking mode:

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

[0059] Rear axle pure electric drive mode:

[0060] If the vehicle is operating in the rear axle pure electric drive mode, the power battery is discharging, the power battery is discharging to the rear motor, and the torque is output from the rear motor to the rear wheels.

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

[0062] If the vehicle is in four-wheel drive rear axle regenerative braking mode, the power battery is charging, the rear motor charges the power battery, and the torque is output from the rear motor to the rear wheels.

[0063] Slow 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 and the rear motor, and the torque is output from the front motor to the front wheels and the rear motor to the rear wheels, respectively.

[0065] External charging mode:

[0066] If the vehicle is in external charging mode, the power battery is charging and there is no discharge current or torque output.

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

[0068] In this embodiment of the application, if the vehicle power status indicates that the vehicle is powered on but 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 charging and discharging status indicates that the vehicle is not plugged in for charging, and the engine running status indicates that the engine is not started, then the vehicle's working mode is determined to be the driving ready mode, and the vehicle is controlled to run in the driving ready mode.

[0069] In this embodiment of the application, 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 not started, the output power of the front motor is greater than the first threshold, the output power of the rear motor is greater than the first threshold, and the charging and discharging status of the power battery indicates that the output current of the power battery is greater than the second threshold, then the vehicle's working mode is determined to be the 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 both be 0.

[0071] In the embodiments of this 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 refers to the engine and drive motor operating in series.

[0073] In 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, including:

[0074] In 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 charging and discharging status indicates that the output current of the power battery is greater than the second threshold, then the vehicle's working mode is determined to be the four-wheel drive range-extending discharge mode, and the vehicle is controlled to operate in the four-wheel drive range-extending discharge mode.

[0075] In 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 working mode is determined to be four-wheel drive range-extending discharge mode; and the vehicle is controlled to operate in four-wheel drive range-extending charging mode.

[0076] In 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 greater than the second threshold, then the vehicle's working mode is determined to be the four-wheel drive rear axle range-extending discharge mode; and the vehicle is controlled to operate in the four-wheel drive rear axle range-extending discharge mode.

[0077] In 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 working mode is determined to be the four-wheel drive rear axle range extender charging mode; and the vehicle is controlled to operate in the four-wheel drive rear axle range extender charging mode.

[0078] In embodiments of this application, the front motor includes a generator and a drive motor.

[0079] In the embodiments of this 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's operating mode is determined based on the generator's output power and the drive motor's output power.

[0080] Parallel mode refers to the engine and drive motor working in parallel.

[0081] In parallel mode, if the vehicle power status indicator shows the vehicle is powered on and the high voltage is on, and the engine operating status indicates the engine is started, the vehicle's operating mode is determined based on the generator's output power and the drive motor's output power, 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 four-wheel drive parallel drive mode; the vehicle is controlled to operate in 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 running 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 working 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 running 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 working 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 preset and can be 0.

[0087] In the embodiments of this 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's operating mode is determined based on the generator's output power, the drive motor's output power, and the rear motor's output power.

[0088] Specifically, if the vehicle power status indicates the vehicle is powered on and the high voltage is on, and the engine operating status indicates the engine is off, the vehicle's operating mode is determined based on the generator's output power, the drive motor's output power, and the rear motor's output power, including:

[0089] If the vehicle power status indicates that the vehicle is powered on and the high voltage is on, the engine operation status indicates that the engine is off, 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 charging and discharging status indicates that the output current of the power battery is less than the second threshold, the vehicle's operating mode is determined to be four-wheel drive regenerative braking mode; the vehicle is controlled to operate in 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 operation status indicates that the engine is off, 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 working 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 on, the engine operation status indicates that the engine is off, 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 working mode is determined to be the four-wheel drive rear axle regenerative braking mode; the vehicle is controlled to operate in the four-wheel drive rear axle regenerative braking mode.

[0092] In the embodiments of this application, 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 accelerator pedal opening is a first threshold, the brake pedal opening indicates that the brake pedal is not depressed, and the vehicle speed signal indicates that the vehicle speed is greater than the first threshold, then the vehicle's working mode is determined to be deceleration charging mode.

[0093] In the embodiments of this application, if the charging / discharging status of the power battery indicates that the vehicle is plugged in for charging, then the vehicle's operating mode is determined to be external charging mode. External charging mode includes fast charging and slow charging.

[0094] Step 203: Generate an energy flow model diagram based on the vehicle's operating mode.

[0095] The energy flow model diagram is used to represent the working state of different power sources and the transmission direction of energy flow signals.

[0096] In the embodiments of this application, such as Figures 3-18 These are the energy flow model diagrams corresponding to the different operating modes. For the energy flow model diagram for the inactive mode, please refer to [link to diagram]. Figure 3 The energy flow model diagram corresponding to the driving-ready mode can be found in [reference needed]. Figure 4 The energy flow model diagram corresponding to the four-wheel drive pure electric drive mode can be found in [reference needed]. Figure 5 The energy flow model diagram corresponding to the four-wheel drive range-extended discharge mode can be found in [reference needed]. Figure 6 The energy flow model diagram corresponding to the four-wheel drive range-extending charging mode can be found in [reference needed]. Figure 7 The energy flow model diagram corresponding to the four-wheel drive parallel drive mode can be found in [reference needed]. Figure 8 The energy flow model diagram corresponding to the direct drive mode can be found in [reference needed]. Figure 9 The energy flow model diagram corresponding to the vehicle-generated power generation mode can be found in [reference needed]. Figure 10 The energy flow model diagram corresponding to the parking power generation mode can be found in [reference needed]. Figure 11 The energy flow model diagram corresponding to the four-wheel drive regenerative braking mode can be found in [reference needed]. Figure 12 The energy flow model diagram corresponding to the external charging mode can be found in [reference needed]. Figure 13 The energy flow model diagram corresponding to the deceleration charging mode can be found in [reference needed]. Figure 14 The energy flow model diagram corresponding to the rear axle pure electric drive mode can be found in [reference needed]. Figure 15 The energy flow model diagram corresponding to the four-wheel drive rear axle range extender charging mode can be found in [reference needed]. Figure 16 The energy flow model diagram corresponding to the four-wheel drive rear axle range extender discharge mode can be found in [reference needed]. Figure 17 The energy flow model diagram corresponding to the four-wheel drive rear axle regenerative braking mode can be found in [reference needed]. Figure 18 .

[0097] It should be noted that, Figures 3-8 The arrows in the diagram indicate the direction of energy flow signal transmission. Figures 3-8A power source with a gray background indicates that the power source is in operation.

[0098] In embodiments of this application, different power sources in the working state in the energy flow model diagram can be identified by different colors.

[0099] Step 204: Display the energy flow model diagram on the vehicle's display screen.

[0100] In this embodiment, energy flow models corresponding to different operating states can be preset, thereby finding the corresponding energy flow model based on the operating state and displaying the energy flow model on the real screen through the cockpit domain. Alternatively, the energy flow model value corresponding to each power source can be determined according to the operating 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 this embodiment, the operating mode corresponding to the working 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 signal. The vehicle is then controlled to operate in the corresponding operating mode, thereby improving the convenience of determining the vehicle's operating mode by determining the vehicle's operating status parameters.

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

[0103] The acquisition module 301 is used to acquire 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 signal.

[0104] The control module 302 is used to control the vehicle's operating mode based on the vehicle's 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 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 also includes:

[0106] The generation module is used to generate energy flow model diagrams based on the vehicle's operating mode;

[0107] The display module is used to display the energy flow model diagram on the vehicle's display screen.

[0108] Optionally, the control module 302 includes:

[0109] The first determining submodule is used to determine the vehicle's operating mode as inactive mode if the vehicle power status indicates that the vehicle is not powered on; inactive mode is used to indicate that the engine, front motor, power battery and rear motor are not working.

[0110] Control the vehicle to operate in an inactive mode.

[0111] Optionally, the control module 302 includes:

[0112] The second determining submodule is used to determine the vehicle's working mode as driving ready mode if the vehicle power status indicates that the vehicle is powered on but 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 the first threshold, the charging and discharging status of the power battery indicates that the vehicle is not plugged in for charging, and the engine's operating status 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 standby mode.

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

[0114] Optionally, the control module 302 includes:

[0115] The third determining submodule is used to determine the vehicle's operating mode as four-wheel drive pure electric drive 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 not started, the output power of the front motor is greater than the first threshold, the output power of the rear motor is greater than the first threshold, and the charging and discharging status of the power battery 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 and rear motors are working, and the power battery is discharging to the front and rear motors.

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

[0117] Optionally, the control module 302 includes:

[0118] The fourth determining submodule is used in series mode to control the vehicle's operating mode 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, 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. In series mode, the engine and the drive motor work in series.

[0119] Optionally, the control module 302 includes:

[0120] The fifth determining submodule is used in parallel mode to control the vehicle's working mode based on the generator's output power and the drive motor's output power, if the vehicle's 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. Parallel mode refers to the engine and drive motor working in parallel.

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

[0122] The sixth determining submodule is used to control the vehicle's operating mode based on the generator's output power, the drive motor's output power, and the rear motor's output power if the vehicle's 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 off.

[0123] Optionally, the control module 302 includes:

[0124] The seventh determination submodule is used to determine the vehicle's operating mode as deceleration charging 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 accelerator pedal opening is at the first threshold, the brake pedal opening indicates that the brake pedal is not depressed, and the vehicle speed signal indicates that the vehicle speed is greater than the first threshold. In 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 from the front motor to the front wheels and the rear motor to the rear wheels, respectively.

[0125] In this embodiment, the operating mode corresponding to the working 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 signal. The vehicle is then controlled to operate in the corresponding operating mode, thereby improving the convenience of determining the vehicle's operating mode by determining the vehicle's operating status parameters.

[0126] It should be noted that the control device for the four-wheel drive hybrid vehicle provided in the above embodiments is only illustrated by the division of the above functional modules when controlling the vehicle's operating mode. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the computer device can be divided into different functional modules to complete all or part of the functions described above. In addition, the control device for the four-wheel drive hybrid vehicle provided in the above embodiments and the control method embodiments for the four-wheel drive hybrid vehicle belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0127] This application also provides a computer device, which includes one or more processors and one or more memories. The one or more memories store at least one instruction, which is loaded and executed by the one or more processors to implement the operation performed by the control method of the four-wheel drive hybrid vehicle.

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

[0129] This application also provides a computer program product containing instructions that, when run on a terminal, causes the terminal to execute the control method for a four-wheel drive hybrid vehicle provided in the above embodiments.

[0130] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

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

Claims

1. A control method for a four-wheel drive hybrid vehicle, characterized in that, The method includes: Acquire 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 signal. Based on the vehicle power status, the engine operating status, the front motor output power, the rear motor output power, the power battery charging and discharging status, the accelerator pedal opening, the brake pedal opening, and the vehicle speed signal, the vehicle's operating mode is controlled. The operating mode is used to indicate the operating status of the engine, front motor, power battery, and rear motor in the vehicle. The front motor includes a generator and a drive motor; the method of controlling 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 includes: In series mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine operation 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 charging and discharging 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 range-extending discharge mode, and the vehicle is controlled to operate in the four-wheel drive range-extending discharge mode; wherein, if the vehicle's operating mode is the four-wheel drive range-extending 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; In 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 range extender charging mode; the vehicle is controlled to operate in the four-wheel drive rear axle range extender charging mode; if the vehicle's operating mode is the four-wheel drive rear axle range extender charging mode, then the engine charges the power battery through the front motor, the power battery is charging, the power battery is discharging to the rear motor, and the rear motor outputs torque to the rear wheels; 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 a four-wheel drive parallel drive mode; the vehicle is controlled to operate in the four-wheel drive parallel drive mode; if the vehicle's working mode is the four-wheel drive parallel drive mode, the power battery is discharging, the power battery is discharging to the rear motor and the front motor, the torque is output from the engine to the front wheel, the front motor to the front wheel, and the rear motor to the rear wheel, respectively, and there is no charging current; In parallel mode, if the vehicle power status indicator shows that the vehicle is powered on and the high voltage is on, the engine running status indicates that the engine is started, the vehicle speed signal indicates that the vehicle speed 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 working mode is determined to be the driving power generation mode; the vehicle is controlled to operate in the driving power generation mode; if the vehicle's working mode is the driving power generation mode, the power battery is discharging, the power battery is discharging to the rear motor, the engine charges the power battery through the front motor, and the torque is output from the engine to the front wheels and from the rear motor to the rear wheels, respectively.

2. The method as described in claim 1, characterized in that, The method further includes: Based on the vehicle's operating mode, an energy flow model diagram is generated; The energy flow model diagram is displayed on the vehicle's display screen.

3. The method as described in claim 1, characterized in that, The method of controlling the vehicle's operating mode based on the vehicle's power status, engine operating status, front motor output power, rear motor output power, power battery charging / discharging status, accelerator pedal opening, brake pedal opening, and vehicle speed signal includes: If the vehicle power status indicates that the vehicle is not powered on, then the vehicle's operating mode 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. Control the vehicle to operate in the inactive mode.

4. The method as described in claim 1, characterized in that, The method of controlling the vehicle's operating mode based on the vehicle's power status, engine operating status, front motor output power, rear motor output power, power battery charging / discharging status, accelerator pedal opening, brake pedal opening, and vehicle speed signal includes: If the vehicle power status indicates that the vehicle is powered on but 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 charging and discharging 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; 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 standby mode; Control the vehicle to operate in the driving-ready mode.

5. The method as described in claim 1, characterized in that, The method of controlling the vehicle's operating mode based on the vehicle's power status, engine operating status, front motor output power, rear motor output power, power battery charging / discharging status, accelerator pedal opening, brake pedal opening, and vehicle speed signal includes: If the vehicle power status indicates that the vehicle is powered on and the high voltage is on, the engine operating 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 charging and discharging status of the power battery indicates that the output current of the power battery is greater than a second threshold, then the vehicle's operating mode is determined to be a four-wheel drive pure electric drive mode; the four-wheel drive pure electric drive mode is used to indicate that the engine is not working, the front and rear motors are working, the power battery is discharging, and the power battery is discharging to the front and rear motors; Control the vehicle to operate in the four-wheel drive pure electric drive mode.

6. The method as described in claim 1, characterized in that, The front motor includes a generator and a drive motor; the method of controlling 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 includes: If the vehicle power status indicates that the vehicle is powered on and the high voltage is on, and the engine operating status indicates that the engine is off, the vehicle's operating mode is controlled based on the generator's output power, the drive motor's output power, and the rear motor's output power.

7. The method as described in claim 1, characterized in that, The method of controlling the vehicle's operating mode based on the vehicle's power status, engine operating status, front motor output power, rear motor output power, power battery charging / discharging status, accelerator pedal opening, brake pedal opening, and vehicle speed signal includes: If the vehicle power status indicates that the vehicle is powered on and the high voltage is on, the engine operating status indicates that the engine is started, the accelerator pedal opening is at a first threshold, the brake pedal opening indicates that the brake pedal is not depressed, 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. In the 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 torque is output from the front motor to the front wheels and from the rear motor to the rear wheels, respectively.

8. A control device for a four-wheel drive hybrid vehicle, characterized in that, The device includes: The acquisition module is used to acquire 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 signal. The control module is used to control the operating mode of the vehicle based on the vehicle power status, the engine operating status, the front motor output power, the rear motor output power, the power battery 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. The front motor includes a generator and a drive motor; the control module is configured to: in series mode, if the vehicle power status indicates that the vehicle is powered on and the high voltage is powered on, the engine operation status indicates that the engine is started, the output power of the drive motor is greater than a first threshold and the output power of the rear motor is greater than a first threshold, and the power battery charging and discharging status indicates that the output current of the power battery is greater than a second threshold, then determine that the vehicle's operating mode is a four-wheel drive range-extending discharge mode, and control the vehicle to operate in the four-wheel drive range-extending discharge mode; wherein if the vehicle's operating mode is the four-wheel drive range-extending discharge mode, the engine charges the power battery, the front motor and the rear motor operate, and the power battery discharges to the front motor and the rear motor; In 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 range extender charging mode; the vehicle is controlled to operate in the four-wheel drive rear axle range extender charging mode; if the vehicle's operating mode is the four-wheel drive rear axle range extender charging mode, then the engine charges the power battery through the front motor, the power battery is charging, the power battery is discharging to the rear motor, and the rear motor outputs torque to the rear wheels; 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 a four-wheel drive parallel drive mode; the vehicle is controlled to operate in the four-wheel drive parallel drive mode; if the vehicle's working mode is the four-wheel drive parallel drive mode, the power battery is discharging, the power battery is discharging to the rear motor and the front motor, the torque is output from the engine to the front wheel, the front motor to the front wheel, and the rear motor to the rear wheel, respectively, and there is no charging current; In parallel mode, if the vehicle power status indicator shows that the vehicle is powered on and the high voltage is on, the engine running status indicates that the engine is started, the vehicle speed signal indicates that the vehicle speed 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 working mode is determined to be the driving power generation mode; the vehicle is controlled to operate in the driving power generation mode; if the vehicle's working mode is the driving power generation mode, the power battery is discharging, the power battery is discharging to the rear motor, the engine charges the power battery through the front motor, and the torque is output from the engine to the front wheels and from the rear motor to the rear wheels, respectively.

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