Hybrid vehicle driving mode control system and switching control method

Abstract

The present invention provides a hybrid vehicle driving mode control system and switching control method. The hybrid vehicle driving mode switching control method includes: obtaining current gear information; obtaining vehicle speed information, mode switch information, S gear information, and air conditioning status request information; obtaining vehicle current status information; identifying the vehicle's current driving mode information, and controlling the vehicle's driving mode based on the vehicle's current status information and the current driving mode information; obtaining engine status information, and controlling the engine to start, stop, and output torque based on the driving mode information; and obtaining motor status information, and controlling the motor to output torque based on the driving mode information. The hybrid vehicle driving mode switching control method of the present invention fully considers the vehicle's switching conditions between different driving modes, can achieve effective control of different driving modes, thereby improving the vehicle's operating stability and further enhancing the user's driving experience.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a hybrid vehicle driving mode control system and a switching control method. Background Art

[0002] Hybrid vehicles offer excellent power and economy, meeting national policies and fuel consumption regulations, and are being promoted and developed by an increasing number of vehicle manufacturers. Hybrid vehicles primarily derive their power from an electric drive system and an engine. By using coordinated control of motor and engine torque distribution, they not only achieve high torque output but also optimize the engine's operating range, ultimately reducing fuel consumption and emissions, ultimately achieving energy conservation and emission reduction goals.

[0003] Because hybrid vehicles have two power sources—an engine and an electric motor—to output torque, their driving modes are more diverse than those of traditional vehicles. Failure to effectively manage these driving modes will inevitably impact the vehicle's drivability, power, and economy. Therefore, accurately and effectively managing driving modes is a key issue currently being addressed. Summary of the Invention

[0004] The main purpose of the present invention is to provide a hybrid vehicle driving mode control system and switching control method. According to the operating characteristics of the hybrid vehicle, the switching conditions of the vehicle in different driving modes are fully considered to achieve effective control of different driving modes, thereby improving the vehicle's operating stability and further enhancing the user's driving experience.

[0005] To achieve the above object, according to one aspect of the present invention, a hybrid vehicle driving mode control system is provided, comprising:

[0006] Vehicle controller;

[0007] Gateway, communicating with the vehicle controller;

[0008] The control panel is connected to the gateway and exchanges information with the vehicle controller through the gateway;

[0009] The gearbox controller is connected to the vehicle controller and sends a gear position signal to the vehicle controller;

[0010] A gear shift mechanism connected to the gearbox controller and transmitting the gear status to the gearbox controller;

[0011] The electronic stability system is connected to the vehicle controller and sends vehicle speed information to the vehicle controller;

[0012] The air conditioning system is connected to the vehicle controller and sends air conditioning request information to the vehicle controller;

[0013] The accelerator pedal is connected to the vehicle controller and sends an acceleration signal to the vehicle controller;

[0014] The brake pedal is connected to the vehicle controller and sends a brake signal to the vehicle controller;

[0015] The engine controller is connected to the vehicle controller and exchanges engine control information with the vehicle controller;

[0016] The motor controller is connected to the vehicle controller and exchanges motor control information with the vehicle controller; and

[0017] The battery management system is connected to the vehicle controller and exchanges battery control information with the vehicle controller.

[0018] According to another aspect of the present invention, a method for switching a driving mode of a hybrid vehicle is provided, comprising:

[0019] Get the current gear information;

[0020] Obtain vehicle speed information, mode switch information, S gear information, and air conditioning status request information;

[0021] Get the vehicle's current status information;

[0022] Identify the current driving mode information of the vehicle and control the vehicle driving mode according to the current state information of the vehicle and the current driving mode information;

[0023] Obtain engine status information and control engine start / stop and torque output according to driving mode information;

[0024] Obtain motor status information and control the motor to output torque according to driving mode information.

[0025] Furthermore, the step of controlling the vehicle driving mode according to the vehicle current state information and the current driving mode information includes:

[0026] When the driving mode control target of the vehicle is driving mode switching, determining whether the current working mode meets the driving mode entry conditions, and if the driving mode entry conditions are met, controlling the vehicle to switch from the current working mode to the target driving mode;

[0027] When the driving mode control target of the vehicle is to exit the current driving mode, determining whether the current driving mode meets the exit condition, and when the driving mode exit condition is met, controlling the vehicle to exit the current driving mode;

[0028] The driving mode is one of the following: normal mode, economy mode, sport mode and forced EV mode.

[0029] Furthermore, the entry conditions for the normal mode are: the vehicle completes high-voltage power-up and the power system has no faults, and the vehicle is in a power-ready state;

[0030] The exit conditions of normal mode are one of the following:

[0031] The key is turned off, the ECO button is triggered, and the shift mechanism is shifted to S gear or manual gear.

[0032] Furthermore, the conditions for entering the sports mode are: the vehicle is in normal mode, and the shift mechanism is engaged in S gear;

[0033] The exit conditions for the sports mode are: the vehicle is in the sports mode and the shift mechanism exits the S gear.

[0034] Furthermore, the entry conditions for the economic mode are: the vehicle is in normal mode and meets the following conditions:

[0035] The ECO button is triggered, the current gear is not S gear, and the current gear is not manual M gear;

[0036] The exit conditions of the economic mode are: the vehicle is in the economic mode and one of the following conditions is met:

[0037] The ECO button is canceled, the shift mechanism is engaged in S gear, and the shift mechanism enters manual M gear.

[0038] Furthermore, the conditions for entering the forced EV mode are: in normal mode or economy mode, the vehicle meets the following conditions:

[0039] The EV button is triggered, the current gear is not S, the current gear is not manual M, the vehicle speed is lower than the vehicle speed calibration value, the SOC is higher than the battery calibration value, the required torque is lower than the motor torque capacity, the engine water temperature is higher than the water temperature calibration value, the air conditioning is not cooling and there is no heating request, the motor system is not faulty, and the power battery is not faulty;

[0040] The exit conditions for the forced EV mode are: the vehicle is in the forced EV mode and one of the following conditions is met:

[0041] The EV button is canceled, the shift mechanism is in S gear, the shift mechanism is in manual M gear, the vehicle speed is higher than the vehicle speed calibration value, the SOC is lower than the battery calibration value, the required torque is higher than the motor torque capacity, the engine water temperature is lower than the water temperature calibration value, the air conditioner has a cooling or heating request, the motor system is faulty, and the power battery is faulty.

[0042] Furthermore, the forced EV mode includes four states: forced EV mode function activated, forced EV mode function inactivated, forced EV mode function unavailable, and forced EV mode function exited, and the indicator light status is different in each state.

[0043] Furthermore, the state switching step of the forced EV mode includes:

[0044] When the forced EV mode is in the active state, if the shift mechanism is not in S gear and is not in manual gear, when the EV button is canceled or the power system fails, the forced EV mode is transferred to the function exit state; if the shift mechanism is in S gear or manual gear, the forced EV mode is transferred to the function unavailable state; if the shift mechanism is not in S gear and is not in manual gear, when the EV mode conditions are not met, the forced EV mode is transferred to the function inactive state;

[0045] When the forced EV mode is in the function exit state, if the shift mechanism is not in S gear and is not in manual gear, when the EV button is pressed and the EV mode conditions are met, the forced EV mode is switched to the function active state; if the shift mechanism is not in S gear and is not in manual gear, when the EV button is pressed, the forced EV mode is switched to the function unavailable state; if the shift mechanism is not in S gear and is not in manual gear, when the EV button is pressed but the EV mode conditions are not met, the forced EV mode is switched to the function inactive state;

[0046] When the forced EV mode is in the inactive state, if the shift mechanism is not in S gear and is not in manual gear, and the EV mode conditions are met, the forced EV mode will be switched to the active state; if the shift mechanism is in S gear or manual gear, the forced EV mode will be switched to the unavailable state; if the EV button is canceled, the forced EV mode will be switched to the exit state;

[0047] When the forced EV mode is in a function-unavailable state, if the shift mechanism is in a non-S gear and a non-manual gear, and the EV mode conditions are met, the forced EV mode will be switched to a function-activated state; if the shift mechanism is in a non-S gear and a non-manual gear but the EV mode conditions are not met, the forced EV mode will be switched to a function-unactivated state; when the unavailable state lasts for t1, the forced EV mode will be switched to a function-exit state.

[0048] Furthermore, when the forced EV mode is in the function activated state, the EV button backlight is illuminated, the EV mode indicator light on the instrument display is green, and the instrument displays "EV mode start";

[0049] When the forced EV mode is in the function exit state, the EV button backlight goes out, the EV mode indicator on the instrument display goes out, and the instrument displays "EV mode off";

[0050] When the forced EV mode is in the inactive state, the EV button backlight is illuminated, the EV mode indicator light on the instrument display is gray, and the instrument displays "EV mode temporarily canceled";

[0051] When the forced EV mode is in the disabled state, the EV button backlight does not light up, the EV mode indicator light on the instrument display is off, and the instrument displays "EV mode disabled".

[0052] Applying the technical solution of the present invention, a hybrid vehicle driving mode switching control method includes: obtaining current gear information; obtaining vehicle speed information, mode switch information, S gear information, and air conditioning status request information; obtaining vehicle current state information; identifying the vehicle's current driving mode information and controlling the vehicle's driving mode based on the vehicle current state information and the current driving mode information; obtaining engine state information and controlling engine starting, stopping, and torque output based on the driving mode information; and obtaining motor state information and controlling the motor's torque output based on the driving mode information. This hybrid vehicle driving mode switching control method, centered around a vehicle controller, provides comprehensive coordinated control judgment for vehicle driving modes. It can obtain operating state signals from various power sources, perform comprehensive judgments, and then formulate switching control strategies for different driving modes. Based on the operating characteristics of the hybrid vehicle, it fully considers the vehicle's switching conditions between different driving modes to achieve effective control of different driving modes, thereby improving vehicle operating stability and further enhancing the user's driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0054] Figure 1 A block diagram showing a power system of a hybrid vehicle according to an embodiment of the present invention is shown;

[0055] Figure 2 A schematic structural diagram of a driving mode control system for a hybrid vehicle according to an embodiment of the present invention is shown;

[0056] Figure 3 A flow chart showing a method for controlling a hybrid vehicle driving mode switching according to an embodiment of the present invention; and

[0057] Figure 4 A flow chart showing a switching control method of a hybrid vehicle driving mode control system in a forced EV mode according to an embodiment of the present invention. DETAILED DESCRIPTION

[0058] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0059] See also Figures 1 to 2 As shown, the present invention provides a hybrid vehicle driving mode control system, which is applied to hybrid vehicles, see Figure 1 As shown in the figure, the hybrid vehicle's powertrain includes the engine, drive motor, power battery, transmission, clutch C0, and drive shaft. One side of the drive motor is connected to the engine via clutch C0, while the other side is connected to the transmission. Each component is controlled by its own controller. These controllers include the engine management system (EMS), hybrid control unit (HCU), motor control unit (MCU), battery management system (BMS), transmission control unit (TCU), electronic stability program (ESP), and air conditioning system (AC). These controllers communicate with each other via the CAN network.

[0060] The hybrid vehicle driving mode control system includes the vehicle controller, gateway, control panel, transmission controller, shift mechanism, electronic stability system, air conditioning system, accelerator pedal, brake pedal, engine controller, motor controller and battery management system.

[0061] The gateway is connected to the vehicle controller for communication; the control panel is connected to the gateway for communication and exchanges information with the vehicle controller through the gateway; the transmission controller is connected to the vehicle controller for communication and sends a gear signal to the vehicle controller; the shift mechanism is connected to the transmission controller for communication and transmits the gear status to the transmission controller; the electronic stability system is connected to the vehicle controller for communication and sends vehicle speed information to the vehicle controller; the air-conditioning system is connected to the vehicle controller for communication and sends air-conditioning request information to the vehicle controller; the accelerator pedal is connected to the vehicle controller for communication and sends an acceleration signal to the vehicle controller; the brake pedal is connected to the vehicle controller for communication and sends a brake signal to the vehicle controller; the engine controller is connected to the vehicle controller for communication and exchanges engine control information with the vehicle controller; the motor controller is connected to the vehicle controller for communication and exchanges motor control information with the vehicle controller; the battery management system is connected to the vehicle controller for communication and exchanges battery control information with the vehicle controller.

[0062] The control panel is equipped with an EV button and an ECO button. The driver selects the driving mode by operating the driving mode switch button on the control panel. The gateway sends the mode switch signal to the vehicle controller.

[0063] The hybrid vehicle driving mode control system also includes an instrument display, which is connected to the gateway and exchanges information with the vehicle controller through the gateway, displaying the "mode information" forwarded by the gateway, thereby showing the driver the current driving mode status of the vehicle.

[0064] The driver uses the shift mechanism to select the appropriate gear, including P / R / N / D, S, and manual (Tip+ / -). The transmission controller detects the shift mechanism's gear status and sends a gear position signal to the vehicle controller. The electronic stability system detects vehicle speed and sends a speed signal to the vehicle controller. The AC sends a request signal for air conditioning status to the vehicle controller.

[0065] The vehicle controller receives EV and ECO mode switches, S gear information, and air conditioning status request information. Based on the current vehicle status (accelerator pedal, brake pedal, vehicle speed, battery SOC and other signals), it identifies the vehicle's driving mode, executes the control strategy corresponding to each mode, and provides display information for the instrument display system.

[0066] The engine controller sends engine status information to the vehicle controller, which then controls the engine to start, stop, and output torque according to the vehicle controller's commands. The motor controller sends motor status information to the vehicle controller, which in turn controls the motor controller and instructs it to execute motor torque output. The battery management system sends information such as the battery SOC and main relay status to the vehicle controller.

[0067] The hybrid vehicle driving mode control system of the embodiment of the present invention integrates the various control parts of the vehicle operation through the vehicle controller, thereby forming a driving mode control system with the vehicle controller as the core. The vehicle controller can be used to combine the parameters of various parts of the vehicle for system control, fully consider various factors in the vehicle driving mode operation process, and can make comprehensive judgments on the switching of the vehicle driving mode. Based on the configuration characteristics of the hybrid vehicle, different mode switching methods are developed, which improves the vehicle's operating stability while meeting the driver's operating needs.

[0068] See also Figure 3 and Figure 4As shown, according to an embodiment of the present invention, a switching control method for a hybrid vehicle driving mode includes: obtaining current gear information; obtaining vehicle speed information, mode switch information, S gear information, and air-conditioning status request information; obtaining vehicle current status information; identifying vehicle current driving mode information, and controlling the vehicle driving mode according to the vehicle current status information and the current driving mode information; obtaining engine status information, and controlling the engine to start, stop, and output torque according to the driving mode information; obtaining motor status information, and controlling the motor to output torque according to the driving mode information.

[0069] The hybrid vehicle driving mode switching control method takes the vehicle controller as the core to form a vehicle driving mode switching control method. It has a relatively comprehensive coordinated control judgment of the vehicle driving mode, can obtain the operating status signal of each power source, make a comprehensive judgment, and then form a switching control strategy under different driving modes. According to the operating characteristics of the hybrid vehicle, the switching conditions of the vehicle under different driving modes are fully considered to achieve effective control of different driving modes, thereby improving the vehicle's operating stability and further enhancing the user's driving experience.

[0070] The steps of controlling the vehicle driving mode according to the vehicle's current state information and current driving mode information include: when the vehicle's driving mode control target is driving mode switching, judging whether the current working mode meets the driving mode entry conditions, and when the driving mode entry conditions are met, controlling the vehicle to switch from the current working mode to the target driving mode; when the vehicle's driving mode control target is to exit the current driving mode, judging whether the current driving mode meets the exit conditions, and when the driving mode exit conditions are met, controlling the vehicle to exit the current driving mode; wherein the driving mode is one of the following: normal mode, economic mode, sports mode and forced EV mode.

[0071] The hybrid vehicle driving mode switching control method proposed in this invention involves driving mode development including normal mode, economy mode, sports mode and forced EV mode. The specific definitions of each mode are as follows:

[0072] Normal Mode: This mode balances the vehicle's economy and power, meeting balanced driving requirements. The accelerator pedal responds smoothly, creating a comprehensive operating mode that strives for comfort, smooth power, and fuel efficiency.

[0073] ECO Mode: This mode achieves the best economy of the vehicle and meets the needs of economical driving. It can appropriately reduce power and comfort. The accelerator pedal's dynamic response speed is slower than the other two modes.

[0074] Sport Mode: This mode achieves the best vehicle power and responsiveness to meet aggressive driving needs, with the most sensitive power response and the fastest accelerator pedal response.

[0075] Forced EV Mode: This mode enables the vehicle to run in pure electric mode. The driver presses the EV mode button to force the hybrid system into EV mode, allowing the vehicle to run in pure electric mode.

[0076] In one embodiment, the entry condition of the normal mode is: the vehicle completes high-voltage power-up and the power system has no faults, and the vehicle is in a power-ready state.

[0077] When the driver operates the key Start, the vehicle completes high-voltage power-up and the power system has no faults, and the entire vehicle can normally PTReady (that is, the vehicle is in the power ready state), the vehicle controller controls the vehicle to enter normal mode.

[0078] The exit conditions for normal mode are one of the following: key off, ECO button triggered, and the shift mechanism shifted into S gear or manual gear.

[0079] When the vehicle is already in normal mode, if the vehicle meets any of the following conditions, the vehicle controller controls the vehicle to exit normal mode.

[0080] 1) Key Off;

[0081] 2) The driver presses the ECO button;

[0082] 3) The driver operates the shift mechanism to engage S gear or manual gear.

[0083] In one embodiment, the entry condition of the sports mode is: the vehicle is in the normal mode and the shift mechanism is in the S gear.

[0084] When the vehicle is in normal mode, if the driver operates the shift mechanism to shift into S gear, the vehicle controller controls the vehicle to enter sports mode.

[0085] The exit conditions for the sports mode are: the vehicle is in the sports mode and the shift mechanism exits the S gear.

[0086] When the vehicle is already in the sport mode, if the driver operates the shift mechanism to exit the S gear, the vehicle controller controls the vehicle to exit the sport mode.

[0087] In one embodiment, the entry condition of the economy mode is: the vehicle is in normal mode and the following conditions are met: the ECO button is triggered, the current gear is not the S gear, and the current gear is not the manual M gear.

[0088] When the vehicle is in normal mode, if the vehicle meets all the following conditions, the vehicle controller controls the vehicle to enter economic mode.

[0089] 1) The driver presses the ECO button;

[0090] 2) The current gear is not S;

[0091] 3) The current gear is non-manual M gear (i.e. manual Tip+ / - gear).

[0092] The exit conditions for economic mode are: the vehicle is in economic mode and one of the following conditions is met: the ECO button is canceled, the shift mechanism is engaged in S gear, and the shift mechanism is engaged in manual M gear.

[0093] When the vehicle is already in the economy mode, if the vehicle meets any of the following conditions, the vehicle controller controls the vehicle to exit the economy mode.

[0094] 1) The driver cancels the ECO button;

[0095] 2) The driver operates the shift mechanism to engage the S gear;

[0096] 3) The driver operates the shift mechanism to enter the manual M gear (i.e. manual Tip+ / - gear).

[0097] In one embodiment, the forced EV mode entry condition is: in normal mode or economy mode, the vehicle meets the following conditions:

[0098] The EV button is triggered, the current gear is not S gear, the current gear is not manual M gear, the vehicle speed is lower than the vehicle speed calibration value, the SOC is higher than the battery calibration value, the required torque is less than the motor torque capacity, the engine water temperature is higher than the water temperature calibration value, the air conditioner has no cooling and no heating request, the motor system has no fault, and the power battery has no fault.

[0099] In normal mode or economy mode, if the vehicle meets all of the following EV mode conditions, the vehicle controller controls the vehicle to enter forced EV mode.

[0100] 1) The driver presses the EV button;

[0101] 2) The current gear is not S;

[0102] 3) The current gear is non-manual M gear (i.e. manual Tip+ / - gear);

[0103] 4) The vehicle speed is lower than a certain calibration value (such as 90km / h, which can be adjusted as needed);

[0104] 5) SOC is higher than a certain calibration value (such as 40%, which can be adjusted as needed);

[0105] 6) The driver's required torque is less than the motor's torque capacity;

[0106] 7) The engine water temperature is higher than a certain calibration value (such as 60°C, which can be adjusted as needed);

[0107] 8) The air conditioner does not cool and there is no request for heating;

[0108] 9) The motor system has no faults;

[0109] 10) The power battery has no faults.

[0110] The exit conditions for the forced EV mode are: the vehicle is in the forced EV mode and one of the following conditions is met:

[0111] The EV button is canceled, the shift mechanism is in S gear, the shift mechanism is in manual M gear, the vehicle speed is higher than the vehicle speed calibration value, the SOC is lower than the battery calibration value, the required torque is higher than the motor torque capacity, the engine water temperature is lower than the water temperature calibration value, the air conditioner has a cooling or heating request, the motor system is faulty, and the power battery is faulty.

[0112] The vehicle is already in forced EV mode. If the vehicle meets any of the following conditions, the vehicle is controlled to exit forced EV mode.

[0113] 1) The driver cancels the EV button;

[0114] 2) The driver operates the shift mechanism to engage the S gear;

[0115] 3) The driver operates the shift mechanism to enter the manual M gear (i.e., manual Tip+ / - gear);

[0116] 4) The vehicle speed is higher than a certain calibration value (such as 90km / h, which can be adjusted as needed);

[0117] 5) SOC is lower than a certain calibration value (such as 35%, which can be adjusted as needed);

[0118] 6) The driver's required torque is greater than the motor's torque capacity;

[0119] 7) The engine water temperature is lower than a certain calibration value (such as 55°C, which can be adjusted as needed);

[0120] 8) The air conditioner has a cooling or heating request;

[0121] 9) The motor system is faulty;

[0122] 10) The power battery is faulty.

[0123] The control method for switching the driving functions of normal mode, economic mode and sports mode is as follows: Figure 3As shown in the figure, when the driver operates the vehicle key to the Start state (i.e., vehicle startup), the vehicle controller determines whether the vehicle's high-voltage power-up is complete by determining whether the power battery's high-voltage main relay is closed. If the high-voltage power-up is complete and the power system is fault-free, the vehicle controller controls the vehicle to enter Normal Mode. Subsequently, if the driver presses the ECO button on the control panel (either after the vehicle's high-voltage power-up is complete or while driving), the vehicle controller determines whether the vehicle's gear position is not S and is not manual. If so, the vehicle controller controls the vehicle to enter Economy Mode.

[0124] In normal mode or economic mode, if the driver operates the shift lever to shift the gear into S gear, the vehicle controller controls the vehicle to enter sports mode; if the driver operates the shift lever to shift the gear into manual gear, the vehicle controller exits the driving mode control at this time, and the driver operates the manual shift Tip+ or Tip- to achieve the driving purpose of manually shifting up Tip+ and down Tip-.

[0125] When the driver presses the forced EV mode button, the vehicle controller controls the vehicle to enter forced EV mode if the vehicle meets the forced EV mode conditions. To better implement EV mode-related functions and information, an EV button and related prompts are designed into the EV mode control strategy. The EV button backlight has two states: on and off. An EV mode indicator light and related information are also included on the instrument display. The EV mode indicator light has three states: green, gray, and off.

[0126] In one embodiment, the forced EV mode includes four states: forced EV mode function activated, forced EV mode function inactivated, forced EV mode function unavailable, and forced EV mode function exited, and the indicator light states are different in each state.

[0127] The state switching steps of the forced EV mode include: when the forced EV mode is in the function activation state, if the shift mechanism is in non-S gear and non-manual gear, when the EV button is canceled or the power system fails, the forced EV mode is switched to the function exit state; if the shift mechanism is in S gear or manual gear, the forced EV mode is switched to the function unavailable state; if the shift mechanism is in non-S gear and non-manual gear, when the EV mode conditions are not met, the forced EV mode is switched to the function inactive state.

[0128] When the forced EV mode is in the function exit state, if the shift mechanism is not in S gear and is not in manual gear, when the EV button is pressed and the EV mode conditions are met, the forced EV mode is switched to the function active state; if the shift mechanism is not in S gear and is not in manual gear, when the EV button is pressed, the forced EV mode is switched to the function unavailable state; if the shift mechanism is not in S gear and is not in manual gear, when the EV button is pressed but the EV mode conditions are not met, the forced EV mode is switched to the function inactive state;

[0129] When the forced EV mode is in the inactive state, if the shift mechanism is not in S gear and is not in manual gear, and the EV mode conditions are met, the forced EV mode will be switched to the active state; if the shift mechanism is in S gear or manual gear, the forced EV mode will be switched to the unavailable state; if the EV button is canceled, the forced EV mode will be switched to the exit state;

[0130] When forced EV mode is in the disabled state, if the shift mechanism is not in S position and is not in manual gear, and the EV mode conditions are met, forced EV mode will be activated. If the shift mechanism is not in S position and is not in manual gear, but the EV mode conditions are not met, forced EV mode will be inactivated. If the disabled state lasts for t1, forced EV mode will be deactivated. Here, t1 is, for example, 5 seconds, but can be set to other values ​​as needed.

[0131] When forced EV mode is active, the EV button backlight illuminates, the EV mode indicator on the instrument panel turns green, and the instrument panel displays "EV Mode Started." If forced EV mode is successfully activated, the vehicle controller shuts down the engine, using the electric motor to drive the vehicle for pure electric driving. At this point, pressing the EV mode button illuminates the EV button backlight, the EV mode indicator on the instrument panel turns green, and the instrument panel displays "EV Mode Started" and other related information.

[0132] When forced EV mode is in the function exited state, the EV button backlight turns off, the EV mode indicator light on the instrument display turns off, and the instrument panel displays "EV Mode Off." If forced EV mode is in the inactive state, the vehicle cannot enter EV mode. When the vehicle EV mode conditions are met, it will automatically switch back to the EV mode active state. At this time, if the EV button is pressed, the EV button backlight will be illuminated, the EV mode indicator light on the instrument panel will turn gray, and the instrument panel will display relevant words such as "EV Mode Temporarily Cancelled."

[0133] When Forced EV mode is inactive, the EV button backlight illuminates, the EV mode indicator on the instrument panel turns gray, and the instrument panel displays "EV mode temporarily canceled." This indicates that Forced EV mode is unavailable. Pressing the EV button at this time turns off the EV button backlight, turns off the EV mode indicator on the instrument panel, and displays "EV mode unavailable" or other related information.

[0134] When the forced EV mode is disabled, the EV button backlight turns off, the EV mode indicator on the instrument panel turns off, and the instrument panel displays "EV Mode Unavailable." This indicates that the vehicle has exited forced EV mode. The EV button backlight turns off, the EV mode indicator on the instrument panel turns off, and the instrument panel displays "EV Mode Off."

[0135] The present invention takes into account the switching conditions of the vehicle in different driving modes, designs switching control strategies for different driving modes, develops switching schemes for different driving modes, and formulates switching control methods for forced EV and non-EV modes, thereby realizing effective switching control of multiple driving modes, thereby improving the vehicle's operating stability and further enhancing the user's driving experience.

[0136] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0137] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0138] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A hybrid vehicle driving mode control system, characterized in that: include: Vehicle controller; A gateway, communicatively connected to the vehicle controller; A control panel, which is in communication with the gateway and exchanges information with the vehicle controller through the gateway; A gearbox controller is connected to the vehicle controller and sends a gear position signal to the vehicle controller; a shift mechanism connected to the transmission controller and transmitting the gear position status to the transmission controller; an electronic stability system, communicatively connected to the vehicle controller and sending vehicle speed information to the vehicle controller; An air conditioning system is communicatively connected to the vehicle controller and sends air conditioning request information to the vehicle controller; an accelerator pedal, communicatively connected to the vehicle controller and sending an acceleration signal to the vehicle controller; a brake pedal, communicatively connected to the vehicle controller and sending a brake signal to the vehicle controller; An engine controller is communicatively connected to the vehicle controller and exchanges engine control information with the vehicle controller; A motor controller is connected to the vehicle controller for communication and exchanges motor control information with the vehicle controller; as well as A battery management system is connected to the vehicle controller and exchanges battery control information with the vehicle controller; The vehicle controller is used to obtain the vehicle's current state information and current driving mode information, and control the vehicle's driving mode according to the vehicle's current state information and current driving mode information: When the driving mode control target of the vehicle is driving mode switching, determining whether the current working mode meets the driving mode entry conditions, and if the driving mode entry conditions are met, controlling the vehicle to switch from the current working mode to the target driving mode; When the driving mode control target of the vehicle is to exit the current driving mode, determining whether the current driving mode meets the exit condition, and when the driving mode exit condition is met, controlling the vehicle to exit the current driving mode; The driving mode is one of the following: normal mode, economy mode, sport mode, and forced EV mode; The conditions for entering the forced EV mode are: in normal mode or economy mode, the vehicle meets all of the following conditions: The EV button is triggered, the current gear is not S, the current gear is not manual M, the vehicle speed is lower than the vehicle speed calibration value, the SOC is higher than the battery calibration value, the required torque is lower than the motor torque capacity, the engine water temperature is higher than the water temperature calibration value, the air conditioning is not cooling and there is no heating request, the motor system is not faulty, and the power battery is not faulty; The exit conditions for the forced EV mode are: the vehicle is in the forced EV mode and one of the following conditions is met: The EV button is canceled, the shift mechanism is in S gear, the shift mechanism is in manual M gear, the vehicle speed is higher than the vehicle speed calibration value, the SOC is lower than the battery calibration value, the required torque is higher than the motor torque capacity, the engine water temperature is lower than the water temperature calibration value, the air conditioner has a cooling or heating request, the motor system is faulty, and the power battery is faulty.

2. A hybrid vehicle driving mode switching control method, characterized in that: include: Get the current gear information; Obtain vehicle speed information, mode switch information, S gear information, and air conditioning status request information; Get the vehicle's current status information; Identify the current driving mode information of the vehicle and control the vehicle driving mode according to the current state information of the vehicle and the current driving mode information; Obtain engine status information and control engine start / stop and torque output according to driving mode information; Obtain motor status information and control the motor to output torque according to driving mode information; The step of controlling the vehicle driving mode according to the vehicle current state information and the current driving mode information includes: When the driving mode control target of the vehicle is driving mode switching, determining whether the current working mode meets the driving mode entry conditions, and if the driving mode entry conditions are met, controlling the vehicle to switch from the current working mode to the target driving mode; When the driving mode control target of the vehicle is to exit the current driving mode, determining whether the current driving mode meets the exit condition, and when the driving mode exit condition is met, controlling the vehicle to exit the current driving mode; The driving mode is one of the following: normal mode, economy mode, sport mode, and forced EV mode; The conditions for entering the forced EV mode are: in normal mode or economy mode, the vehicle meets all of the following conditions: The EV button is triggered, the current gear is not S, the current gear is not manual M, the vehicle speed is lower than the vehicle speed calibration value, the SOC is higher than the battery calibration value, the required torque is lower than the motor torque capacity, the engine water temperature is higher than the water temperature calibration value, the air conditioning is not cooling and there is no heating request, the motor system is not faulty, and the power battery is not faulty; The exit conditions for the forced EV mode are: the vehicle is in the forced EV mode and one of the following conditions is met: The EV button is canceled, the shift mechanism is in S gear, the shift mechanism is in manual M gear, the vehicle speed is higher than the vehicle speed calibration value, the SOC is lower than the battery calibration value, the required torque is higher than the motor torque capacity, the engine water temperature is lower than the water temperature calibration value, the air conditioner has a cooling or heating request, the motor system is faulty, and the power battery is faulty.

3. The switching control method according to claim 2, wherein: The conditions for entering the normal mode are: the vehicle has completed high-voltage power-up and the power system has no faults, and the vehicle is in the power-ready state; The exit conditions of normal mode are one of the following: The key is turned off, the ECO button is triggered, and the shift mechanism is shifted to S gear or manual gear.

4. The switching control method according to claim 2, wherein: The conditions for entering the sports mode are: the vehicle is in normal mode and the shift mechanism is in S gear; The exit conditions for the sports mode are: the vehicle is in the sports mode and the shift mechanism exits the S gear.

5. The switching control method according to claim 2, wherein: The entry conditions for economic mode are: the vehicle is in normal mode and meets the following conditions: The ECO button is triggered, the current gear is not S gear, and the current gear is not manual M gear; The exit conditions of the economic mode are: the vehicle is in the economic mode and one of the following conditions is met: The ECO button is canceled, the shift mechanism is engaged in S gear, and the shift mechanism enters manual M gear.

6. The switching control method according to claim 2, wherein: The forced EV mode includes four states: forced EV mode function activated, forced EV mode function inactivated, forced EV mode function unavailable, and forced EV mode function exited. The indicator light status is different in each state.

7. The switching control method according to claim 6, wherein: The state switching steps of forced EV mode include: When the forced EV mode is in the active state, if the shift mechanism is not in S gear and is not in manual gear, when the EV button is canceled or the power system fails, the forced EV mode is transferred to the function exit state; if the shift mechanism is in S gear or manual gear, the forced EV mode is transferred to the function unavailable state; if the shift mechanism is not in S gear and is not in manual gear, when the EV mode conditions are not met, the forced EV mode is transferred to the function inactive state; When the forced EV mode is in the function exit state, if the shift mechanism is not in S gear and is not in manual gear, when the EV button is pressed and the EV mode conditions are met, the forced EV mode is switched to the function active state; if the shift mechanism is not in S gear and is not in manual gear, when the EV button is pressed, the forced EV mode is switched to the function unavailable state; if the shift mechanism is not in S gear and is not in manual gear, when the EV button is pressed but the EV mode conditions are not met, the forced EV mode is switched to the function inactive state; When the forced EV mode is in the inactive state, if the shift mechanism is not in S gear and is not in manual gear, and the EV mode conditions are met, the forced EV mode will be switched to the active state; if the shift mechanism is in S gear or manual gear, the forced EV mode will be switched to the unavailable state; if the EV button is canceled, the forced EV mode will be switched to the exit state; When the forced EV mode is in a function-unavailable state, if the shift mechanism is in a non-S gear and a non-manual gear, and the EV mode conditions are met, the forced EV mode will be switched to a function-activated state; if the shift mechanism is in a non-S gear and a non-manual gear but the EV mode conditions are not met, the forced EV mode will be switched to a function-unactivated state; when the unavailable state lasts for t1, the forced EV mode will be switched to a function-exit state.

8. The switching control method according to claim 6, wherein: When the forced EV mode is activated, the EV button backlight is illuminated, the EV mode indicator on the instrument display turns green, and the instrument displays "EV mode start"; When the forced EV mode is in the function exit state, the EV button backlight goes out, the EV mode indicator on the instrument display goes out, and the instrument displays "EV mode off"; When the forced EV mode is in the inactive state, the EV button backlight is illuminated, the EV mode indicator light on the instrument display turns gray, and the instrument displays "EV mode temporarily canceled"; When the forced EV mode is in the disabled state, the EV button backlight does not light up, the EV mode indicator light on the instrument display is off, and the instrument displays "EV mode disabled".

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