A drive mode control method and system for a plug-in hybrid electric vehicle

Abstract

The application provides a driving mode control method and system for a plug-in hybrid electric vehicle, the method comprising: obtaining historical state information of the vehicle when the vehicle starts; controlling the vehicle to start in an EV mode or an HEV mode according to the historical state information; obtaining current state information and navigation information of the vehicle when the vehicle travels in the EV mode and the current electric quantity is greater than a forced power preservation electric quantity; judging whether the vehicle meets a preset driving mode switching condition according to the current state information and the navigation information; and switching the driving mode of the vehicle to the HEV mode if the driving mode switching condition is met, thereby effectively preventing engine carbon deposition of the plug-in hybrid electric vehicle and improving the service life of the engine of the plug-in hybrid electric vehicle.

Description

Technical Field

[0001] The present application relates to the field of vehicle control and Internet of Vehicles big data technology, and in particular to a driving mode control method and system for a plug-in hybrid electric vehicle. Background Art

[0002] Plug-in hybrid electric vehicles (PHEVs) typically have two driving modes: EV (pure electric) and HEV (hybrid electric). Switching between EV and HEV modes can be done manually or automatically. Automatic switching typically involves the system switching based on a battery-holding threshold (which can be set by the user or by default). When the vehicle's current battery level falls below the battery-holding threshold, the vehicle switches to HEV mode. In current mainstream PHEV models, automatic switching only supports switching from EV to HEV mode. Manual switching is required to switch from HEV to EV mode.

[0003] Compared to fuel-powered vehicles, the engines of plug-in hybrid vehicles are not constantly running. During a single power-on cycle, the engine may start briefly before switching to EV mode, or the vehicle may simply shut down. This results in the engine starting time being too short and the fuel not being fully burned. Incompletely burned fuel forms carbon deposits inside the engine, which deposit on the engine's intake duct, combustion chamber walls, spark plugs, and other areas. Long-term accumulation can cause wear and damage to engine components such as valves and pistons, shortening the engine's service life and potentially preventing the vehicle from starting properly.

[0004] Among the current mainstream plug-in hybrid electric vehicles, there are mainly two driving scenarios that are prone to cause the engine start time to be too short, resulting in carbon deposit failure: (1) The vehicle does not support automatic switching from HEV mode to EV mode. During a power-on process, the vehicle automatically switches to HEV mode due to triggering forced power preservation. The HEV mode is maintained at the next power-on, but the vehicle is charged during the two power-ups. As a result, the user immediately manually switches to EV mode after noticing when the engine starts, resulting in the engine start time being too short; (2) The vehicle system switches to HEV mode according to the forced power preservation threshold, but does not consider the user's current driving status. As a result, the vehicle arrives at the destination before the engine is fully burned after the switch, and the power is turned off, terminating the engine operation. Summary of the Invention

[0005] In response to the above technical problems, the present application provides a driving mode control method and system for a plug-in hybrid vehicle to prevent carbon deposits in the plug-in hybrid vehicle engine and improve the service life of the plug-in hybrid vehicle engine.

[0006] In a first aspect, an embodiment of the present application provides a driving mode control method for a plug-in hybrid electric vehicle, comprising:

[0007] When the vehicle is started, obtain the historical status information of the vehicle;

[0008] controlling the vehicle to start in EV mode or HEV mode according to the historical state information;

[0009] When the vehicle is running in EV mode and the current power is greater than the mandatory power reserve, obtain the vehicle's current status information and navigation information;

[0010] determining whether the vehicle meets a preset driving mode switching condition based on the current state information and the navigation information;

[0011] If the driving mode switching condition is satisfied, the driving mode of the vehicle is switched to the HEV mode.

[0012] The present application provides a method for controlling the drive mode of a plug-in hybrid electric vehicle (PHEV). By controlling the vehicle's drive mode based on relevant information during vehicle startup and driving, the method avoids carbon deposits caused by incomplete engine combustion and improves the service life of the plug-in hybrid vehicle engine. Specifically, when the vehicle is started, the method analyzes the vehicle's historical status information to determine the user's last vehicle usage scenario, and then actively controls the vehicle to start in EV mode or HEV mode. Compared to the prior art method of starting in the default mode or the last drive mode, the present application can actively predict the user's demand mode, avoiding the problem of the user manually switching to EV mode immediately after the vehicle starts in HEV mode, resulting in an excessively short engine start time. When the vehicle is driving in EV mode, if the current battery level is greater than the mandatory power reserve, the drive mode may automatically switch. In this scenario, it is easy for the vehicle to reach its destination before the engine has fully burned after the drive mode is switched, and the power is turned off, terminating the engine operation. Therefore, the vehicle's driving process is predicted based on the current status information and navigation information. When it is determined that the driving mode switching conditions are met, the vehicle's driving mode is switched to HEV mode in advance, allowing the engine to fully burn, preventing carbon deposits in the plug-in hybrid vehicle engine, and increasing the service life of the plug-in hybrid vehicle engine.

[0013] In one possible implementation, when the vehicle is started, obtaining historical status information of the vehicle includes:

[0014] When the vehicle is running, continuously uploading historical operation data, the historical operation data including vehicle driving mode, vehicle operation mode, battery power, forced power conservation power and engine speed;

[0015] After data cleaning and data slicing of the historical operation data, power-on segment data and charging segment data are constructed;

[0016] Storing the power-on segment data and the charging segment data in a preset database;

[0017] When the vehicle is started, the vehicle's last power-on segment data and charging segment data are obtained from the database, and the power-on process information and charging process information are obtained by analysis;

[0018] The historical status information is constructed by combining the power-on process information and the charging process information.

[0019] In the embodiment of the present application, by pre-cleaning and slicing historical data, power-on and charging segment data are obtained. This data can then be used to analyze the vehicle's previous power-on and charging process information, providing a data basis for selecting a drive mode the next time the vehicle is started. Furthermore, the power-on and charging segment data in the embodiment of the present application are both stored in a preset database. After a certain period of accumulation, the user's driving habits can be analyzed based on the data in the database, thereby improving the operating logic for automatic drive mode selection or switching.

[0020] In one possible implementation, controlling the vehicle to start in the EV mode or the HEV mode according to the historical state information includes:

[0021] determining, based on power-on process information in the historical status information, whether the vehicle is in HEV mode at the time of power-off, and if not, controlling the vehicle to start in EV mode;

[0022] If it is determined that the vehicle is in the HEV mode at the time of power-off, determining whether the HEV mode is automatically switched by the system due to forced power conservation based on the power-on process information, and if not, controlling the vehicle to start in the HEV mode;

[0023] If it is determined that the vehicle is in HEV mode at the time of power-off, and the HEV mode is automatically switched by the system due to forced power preservation, then based on the charging process information in the historical status information, it is determined whether the vehicle has charging behavior after the power-off time. If there is charging behavior, the vehicle is controlled to start in EV mode, otherwise the vehicle is controlled to start in HEV mode.

[0024] The present invention provides a method for controlling a vehicle to start in a specific driving mode based on historical state information. First, the vehicle's driving mode at power-off is determined based on power-on process information. If the vehicle was in EV mode at power-off, there is no risk of carbon deposits at startup, and no intervention is required, allowing the vehicle to start in EV mode. If the vehicle was in HEV mode at power-off, it is necessary to consider whether the user will manually switch to EV mode at startup, thereby predicting the user's driving mode requirement. Further analysis is then required to determine the reason for the vehicle switching to HEV mode. If the user manually switched, this indicates that the user's current driving mode requirement is HEV mode. To ensure a good user experience, the vehicle will start in HEV mode. If the system automatically switches to HEV mode due to a mandatory battery protection, further analysis is required based on charging process information. If the user charges after powering off, it is determined that the user's current driving mode requirement is EV mode, and the vehicle is controlled to start in EV mode. If the user does not charge, the vehicle starts in HEV mode. Because the vehicle triggers a mandatory battery protection, the user cannot manually switch to EV mode within a short period of time, ensuring sufficient engine combustion time and avoiding the risk of carbon deposits.

[0025] In one possible implementation, determining whether the vehicle meets a preset driving mode switching condition based on the current state information and the navigation information includes:

[0026] determining, based on the current state information and the navigation information, whether the remaining driving time is equal to a preset engine full combustion time;

[0027] If the remaining driving time is equal to the engine full combustion time, predicting whether the vehicle has a carbon deposition risk based on the current state information and the navigation information;

[0028] If it is predicted that the vehicle has a carbon deposit risk, it is determined that the vehicle meets a preset driving mode switching condition.

[0029] The embodiment of the present application provides a method for judging whether the driving mode switching conditions are met. Different from the conventional risk judgment logic, the embodiment of the present application first judges whether the remaining driving time is equal to the preset engine full combustion time, and then predicts whether the vehicle has a carbon deposit risk under the premise of meeting the above conditions. This is because only when the remaining driving time is greater than the engine full combustion time can the drive switch be performed to avoid the engine carbon deposit problem. If you first predict whether the vehicle has a carbon deposit risk, then when it is found that there is a carbon deposit risk, it is very likely that the remaining driving time of the vehicle no longer meets the time requirement for engine full combustion, and it is meaningless to switch the driving mode at this time. The use of an equal sign instead of a greater than sign as the comparison condition between the remaining driving time and the engine full combustion time is to avoid automatically switching the EV mode to the HEV mode too early, so that the driving mode control method provided by the embodiment of the present application is more reasonable and accurate in the timing of driving mode switching, thereby improving the user experience.

[0030] Furthermore, the determining, based on the current state information and the navigation information, whether the remaining driving time is equal to a preset engine full combustion time includes:

[0031] calculating a first remaining distance between the vehicle and a destination based on the current state information and the navigation information;

[0032] predicting a first remaining travel time of the vehicle based on the current state information and the first remaining distance;

[0033] It is determined whether the first remaining driving time is equal to the engine sufficient combustion time.

[0034] Furthermore, the predicting whether the vehicle has a carbon deposition risk based on the current state information and the navigation information includes:

[0035] calculating a first remaining distance between the vehicle and a destination based on the current state information and the navigation information;

[0036] Calculating a pure electric cruising range of the vehicle based on the current state information, where the pure electric cruising range is the mileage traveled by the vehicle during a process in which the battery power level is increased from the current power level to the mandatory power conservation level;

[0037] If the pure electric cruising range is less than the first remaining range, predicting a second remaining driving time after the vehicle automatically switches to the HEV mode in the mandatory power conservation state based on the current state information and the second remaining range, where the second remaining range is the difference between the first remaining range and the pure electric cruising range;

[0038] If the second remaining driving time is less than the engine full combustion time, it is predicted that the vehicle has a carbon deposit risk.

[0039] The embodiment of the present application provides a method for predicting the risk of carbon deposits. The pure electric cruising range can be calculated based on the difference between the current power and the mandatory power conservation power, and then the pure electric cruising range is compared with the first remaining distance. If the pure electric cruising range is less than the first remaining distance, it means that the vehicle will automatically switch to HEV mode during driving. At this time, if the second remaining driving time corresponding to the second remaining distance is less than the engine's full combustion time, then when the vehicle arrives at the destination, the engine has not fully burned, and there is a risk of carbon deposits. Therefore, the embodiment of the present application advances the time point for automatic switching of the HEV mode to create conditions for full combustion of the engine and avoid the risk of carbon deposits in this usage scenario. Since it has been determined before that the current moment is the best time point for switching the driving mode, after determining that there is a risk of carbon deposits, the driving mode of the vehicle can be immediately switched to HEV mode at the current moment to prevent carbon deposits in the plug-in hybrid vehicle engine and increase the service life of the plug-in hybrid vehicle engine.

[0040] Furthermore, if the driving mode switching condition is satisfied, switching the driving mode of the vehicle to the HEV mode includes:

[0041] The forced power conservation power is set to the current power, thereby triggering the forced power conservation function of the vehicle, thereby automatically switching the driving mode of the vehicle to the HEV mode.

[0042] In an embodiment of the present application, when the driving mode is switched, the vehicle's automatic driving mode switching function is triggered by adjusting the forced power conservation amount, so that the deployment of the embodiment of the present application does not require major modifications to the vehicle's native system, greatly reducing the application cost of the embodiment of the present application and ensuring the safety and stability of the vehicle's native system.

[0043] In one possible implementation, the driving mode control method further includes:

[0044] When the vehicle is traveling in the HEV mode, recording a single running time of the engine;

[0045] Whenever the single operation time is less than the preset engine full combustion time, the number of engine incomplete combustion times is accumulated;

[0046] If the number of incomplete combustion events of the engine exceeds a preset threshold, a prompt message is sent to the preset device.

[0047] In an embodiment of this application, a carbon deposit reminder function is further provided. By recording the duration of a single engine run, it can be determined whether the user is ensuring sufficient engine combustion each time. If the number of incomplete engine combustion exceeds a preset threshold, a reminder message is sent to the user, thereby changing the user's driving habits, reducing the risk of carbon deposits, and improving the user experience.

[0048] In a second aspect, accordingly, an embodiment of the present application provides a driving mode control system for a plug-in hybrid electric vehicle, comprising a first acquisition module, a start module, a second acquisition module, a judgment module, and a mode switching module;

[0049] Wherein, the first acquisition module is used to acquire historical status information of the vehicle when the vehicle is started;

[0050] The starting module is used to control the vehicle to start in EV mode or HEV mode according to the historical state information;

[0051] The second acquisition module is used to acquire the current state information and navigation information of the vehicle when the vehicle is traveling in EV mode and the current power is greater than the mandatory power conservation power;

[0052] The judgment module is used to judge whether the vehicle meets a preset driving mode switching condition according to the current state information and the navigation information;

[0053] The mode switching module is configured to switch the driving mode of the vehicle to the HEV mode if the driving mode switching condition is met.

[0054] Furthermore, the determining module determines whether the vehicle satisfies a preset driving mode switching condition based on the current state information and the navigation information, including:

[0055] determining, based on the current state information and the navigation information, whether the remaining driving time is equal to a preset engine full combustion time;

[0056] If the remaining driving time is equal to the engine full combustion time, predicting whether the vehicle has a carbon deposition risk based on the current state information and the navigation information;

[0057] If it is predicted that the vehicle has a carbon deposit risk, it is determined that the vehicle meets a preset driving mode switching condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 : A flow chart of a driving mode control method for a plug-in hybrid electric vehicle provided in an embodiment of the present application.

[0059] Figure 2: A schematic diagram of the process of preprocessing historical operating data in a driving mode control method of a plug-in hybrid electric vehicle provided in an embodiment of the present application.

[0060] Figure 3 : A schematic diagram of a flow chart of controlling a vehicle to start in a certain mode in a driving mode control method of a plug-in hybrid vehicle provided in an embodiment of the present application.

[0061] Figure 4 : A schematic diagram of a process for automatically switching driving modes in a driving mode control method for a plug-in hybrid electric vehicle provided in an embodiment of the present application.

[0062] Figure 5 : A flow chart of implementing a reminder service in a driving mode control method for a plug-in hybrid electric vehicle provided in an embodiment of the present application.

[0063] Figure 6 : A structural diagram of a drive mode control system of a plug-in hybrid electric vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0064] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0065] It should be noted that the step numbers herein are for convenience of explanation of the specific embodiments and do not serve to define the order in which the steps are to be performed. In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features.

[0066] Example 1:

[0067] like Figure 1 As shown, the first embodiment provides a driving mode control method for a plug-in hybrid electric vehicle, including steps S1-S5:

[0068] Step S1: When the vehicle is started, obtain the historical status information of the vehicle;

[0069] Step S2: controlling the vehicle to start in EV mode or HEV mode according to the historical state information;

[0070] Step S3: When the vehicle is traveling in EV mode and the current power level is greater than the mandatory power conservation level, obtaining the vehicle's current state information and navigation information;

[0071] Step S4: determining whether the vehicle meets a preset driving mode switching condition based on the current state information and the navigation information;

[0072] Step S5: If the driving mode switching condition is met, the driving mode of the vehicle is switched to the HEV mode.

[0073] The present application provides a method for controlling the drive mode of a plug-in hybrid electric vehicle (PHEV). By controlling the vehicle's drive mode based on relevant information during vehicle startup and driving, the method avoids carbon deposits caused by incomplete engine combustion and improves the service life of the plug-in hybrid vehicle engine. Specifically, when the vehicle is started, the method analyzes the vehicle's historical status information to determine the user's last vehicle usage scenario, and then actively controls the vehicle to start in EV mode or HEV mode. Compared to the prior art method of starting in the default mode or the last drive mode, the present application can actively predict the user's demand mode, avoiding the problem of the user manually switching to EV mode immediately after the vehicle starts in HEV mode, resulting in an excessively short engine start time. When the vehicle is driving in EV mode, if the current battery level is greater than the mandatory power reserve, the drive mode may automatically switch. In this scenario, it is easy for the vehicle to reach its destination before the engine has fully burned after the drive mode is switched, and the power is turned off, terminating the engine operation. Therefore, the vehicle's driving process is predicted based on the current status information and navigation information. When it is determined that the driving mode switching conditions are met, the vehicle's driving mode is switched to HEV mode in advance, allowing the engine to fully burn, preventing carbon deposits in the plug-in hybrid vehicle engine, and increasing the service life of the plug-in hybrid vehicle engine.

[0074] In one possible implementation, in step S1, when the vehicle is started, obtaining historical status information of the vehicle includes:

[0075] When the vehicle is running, continuously uploading historical operation data, the historical operation data including vehicle driving mode, vehicle operation mode, battery power, forced power conservation power and engine speed;

[0076] After data cleaning and data slicing of the historical operation data, power-on segment data and charging segment data are constructed;

[0077] Storing the power-on segment data and the charging segment data in a preset database;

[0078] When the vehicle is started, the vehicle's last power-on segment data and charging segment data are obtained from the database, and the power-on process information and charging process information are obtained by analysis;

[0079] The historical status information is constructed by combining the power-on process information and the charging process information.

[0080] In a preferred embodiment, Figure 2 As shown, the vehicle uploads its status information, such as driving mode, operating mode, battery level, mandatory battery charge, and engine speed, to the system's cloud, which cleans and pre-processes the data. The big data computing module determines whether the vehicle's operating mode is driving or charging, slices the data into power-on and charging segments, and stores the results in a database.

[0081] In the embodiment of the present application, by pre-cleaning and slicing historical data, power-on and charging segment data are obtained. This data can then be used to analyze the vehicle's previous power-on and charging process information, providing a data basis for selecting a drive mode the next time the vehicle is started. Furthermore, the power-on and charging segment data in the embodiment of the present application are both stored in a preset database. After a certain period of accumulation, the user's driving habits can be analyzed based on the data in the database, thereby improving the operating logic for automatic drive mode selection or switching.

[0082] In one possible implementation, in step S2, controlling the vehicle to start in the EV mode or the HEV mode according to the historical state information includes:

[0083] determining, based on power-on process information in the historical status information, whether the vehicle is in HEV mode at the time of power-off, and if not, controlling the vehicle to start in EV mode;

[0084] If it is determined that the vehicle is in the HEV mode at the time of power-off, determining whether the HEV mode is automatically switched by the system due to forced power conservation based on the power-on process information, and if not, controlling the vehicle to start in the HEV mode;

[0085] If it is determined that the vehicle is in HEV mode at the time of power-off, and the HEV mode is automatically switched by the system due to forced power preservation, then based on the charging process information in the historical status information, it is determined whether the vehicle has charging behavior after the power-off time. If there is charging behavior, the vehicle is controlled to start in EV mode, otherwise the vehicle is controlled to start in HEV mode.

[0086] In a preferred embodiment, Figure 3As shown, based on the current time, the vehicle's last power-on process information and charging process information are obtained, and the current vehicle information status is obtained; first, it is determined whether the vehicle was in HEV mode at the time of power-off during the last power-on process, and whether the HEV mode is automatically switched by the system; if the vehicle automatically switched to HEV mode due to triggering a mandatory power-saving condition during the last power-on process, then it is determined whether the vehicle had charging behavior during the two power-on processes; if the vehicle automatically switched to HEV mode due to triggering a mandatory power-saving condition during the last power-on process and the user had charging behavior after powering off, then it is determined that the user's current demand mode should be EV mode, and at this time the system will switch the vehicle's drive mode to EV mode.

[0087] The present invention provides a method for controlling a vehicle to start in a specific driving mode based on historical state information. First, the vehicle's driving mode at power-off is determined based on power-on process information. If the vehicle was in EV mode at power-off, there is no risk of carbon deposits at startup, and no intervention is required, allowing the vehicle to start in EV mode. If the vehicle was in HEV mode at power-off, it is necessary to consider whether the user will manually switch to EV mode at startup, thereby predicting the user's driving mode requirement. Further analysis is then required to determine the reason for the vehicle switching to HEV mode. If the user manually switched, this indicates that the user's current driving mode requirement is HEV mode. To ensure a good user experience, the vehicle will start in HEV mode. If the system automatically switches to HEV mode due to a mandatory battery protection, further analysis is required based on charging process information. If the user charges after powering off, it is determined that the user's current driving mode requirement is EV mode, and the vehicle is controlled to start in EV mode. If the user does not charge, the vehicle starts in HEV mode. Because the vehicle triggers a mandatory battery protection, the user cannot manually switch to EV mode within a short period of time, ensuring sufficient engine combustion time and avoiding the risk of carbon deposits.

[0088] In one possible implementation, in step S4, determining whether the vehicle meets a preset driving mode switching condition based on the current state information and the navigation information includes:

[0089] determining, based on the current state information and the navigation information, whether the remaining driving time is equal to a preset engine full combustion time;

[0090] If the remaining driving time is equal to the engine full combustion time, predicting whether the vehicle has a carbon deposition risk based on the current state information and the navigation information;

[0091] If it is predicted that the vehicle has a carbon deposit risk, it is determined that the vehicle meets a preset driving mode switching condition.

[0092] The embodiment of the present application provides a method for judging whether the driving mode switching conditions are met. Different from the conventional risk judgment logic, the embodiment of the present application first judges whether the remaining driving time is equal to the preset engine full combustion time, and then predicts whether the vehicle has a carbon deposit risk under the premise of meeting the above conditions. This is because only when the remaining driving time is greater than the engine full combustion time can the drive switch be performed to avoid the engine carbon deposit problem. If you first predict whether the vehicle has a carbon deposit risk, then when it is found that there is a carbon deposit risk, it is very likely that the remaining driving time of the vehicle no longer meets the time requirement for engine full combustion, and it is meaningless to switch the driving mode at this time. The use of an equal sign instead of a greater than sign as the comparison condition between the remaining driving time and the engine full combustion time is to avoid automatically switching the EV mode to the HEV mode too early, so that the driving mode control method provided by the embodiment of the present application is more reasonable and accurate in the timing of driving mode switching, thereby improving the user experience.

[0093] Furthermore, the determining, based on the current state information and the navigation information, whether the remaining driving time is equal to a preset engine full combustion time includes:

[0094] calculating a first remaining distance between the vehicle and a destination based on the current state information and the navigation information;

[0095] predicting a first remaining travel time of the vehicle based on the current state information and the first remaining distance;

[0096] It is determined whether the first remaining driving time is equal to the engine sufficient combustion time.

[0097] Furthermore, the predicting whether the vehicle has a carbon deposition risk based on the current state information and the navigation information includes:

[0098] calculating a first remaining distance between the vehicle and a destination based on the current state information and the navigation information;

[0099] Calculating a pure electric cruising range of the vehicle based on the current state information, where the pure electric cruising range is the mileage traveled by the vehicle during a process in which the battery power level is increased from the current power level to the mandatory power conservation level;

[0100] If the pure electric cruising range is less than the first remaining range, predicting a second remaining driving time after the vehicle automatically switches to the HEV mode in the mandatory power conservation state based on the current state information and the second remaining range, where the second remaining range is the difference between the first remaining range and the pure electric cruising range;

[0101] If the second remaining driving time is less than the engine full combustion time, it is predicted that the vehicle has a carbon deposit risk.

[0102] The embodiment of the present application provides a method for predicting the risk of carbon deposits. The pure electric cruising range can be calculated based on the difference between the current power and the mandatory power conservation power, and then the pure electric cruising range is compared with the first remaining distance. If the pure electric cruising range is less than the first remaining distance, it means that the vehicle will automatically switch to HEV mode during driving. At this time, if the second remaining driving time corresponding to the second remaining distance is less than the engine's full combustion time, then when the vehicle arrives at the destination, the engine has not fully burned, and there is a risk of carbon deposits. Therefore, the embodiment of the present application advances the time point for automatic switching of the HEV mode to create conditions for full combustion of the engine and avoid the risk of carbon deposits in this usage scenario. Since it has been determined before that the current moment is the best time point for switching the driving mode, after determining that there is a risk of carbon deposits, the driving mode of the vehicle can be immediately switched to HEV mode at the current moment to prevent carbon deposits in the plug-in hybrid vehicle engine and increase the service life of the plug-in hybrid vehicle engine.

[0103] Furthermore, in step S5, if the driving mode switching condition is satisfied, the driving mode of the vehicle is switched to the HEV mode, including:

[0104] The forced power conservation power is set to the current power, thereby triggering the forced power conservation function of the vehicle, thereby automatically switching the driving mode of the vehicle to the HEV mode.

[0105] In an embodiment of the present application, when the driving mode is switched, the vehicle's automatic driving mode switching function is triggered by adjusting the forced power conservation amount, so that the deployment of the embodiment of the present application does not require major modifications to the vehicle's native system, greatly reducing the application cost of the embodiment of the present application and ensuring the safety and stability of the vehicle's native system.

[0106] In a preferred embodiment, Figure 4 As shown, the vehicle status and navigation information are combined to calculate in real time whether the vehicle can maintain pure electric mode to the destination under the current battery power and the preset forced power conservation power conditions; if it is determined that the vehicle cannot maintain pure electric mode to the destination, and the remaining planned route cannot meet the conditions for full engine combustion when switching to HEV mode, the forced power conservation power will be increased, and the vehicle will be switched to HEV mode in advance to start the engine for full combustion.

[0107] The specific implementation method is as follows: obtain current vehicle status information and navigation route information to determine whether the vehicle is currently in EV mode; for vehicles in EV mode, if the vehicle's current battery level is greater than the preset mandatory battery-maintaining level, calculate in real time the pure electric range between the current battery level and the preset mandatory battery-maintaining level, and the first remaining distance between the current location and the planned destination, denoted as a and b, respectively; calculate in real time the estimated travel time to the planned destination and the driving conditions; for vehicles whose remaining conditions just meet the conditions for full engine combustion, determine the size of a and b; if a is less than b, determine that there is a risk of carbon deposits. Adjust the current battery level to the mandatory battery-maintaining level, so that the vehicle's drive mode switches from EV mode to HEV mode in advance.

[0108] In one possible implementation, the driving mode control method further includes:

[0109] When the vehicle is traveling in the HEV mode, recording a single running time of the engine;

[0110] Whenever the single operation time is less than the preset engine full combustion time, the number of engine incomplete combustion times is accumulated;

[0111] If the number of incomplete combustion events of the engine exceeds a preset threshold, a prompt message is sent to the preset device.

[0112] In a preferred embodiment, Figure 5 As shown, for vehicles with insufficient engine combustion, the system calculates the vehicle's historical usage data to determine whether the engine was started and fully burned during each use. For vehicles with 10 or more instances of insufficient engine combustion (when it is determined that the engine is fully burned, the data is reset and recalculated), a proactive reminder is provided to remind the user that the vehicle's engine has not been fully burned for a long time. To avoid carbon deposits caused by insufficient engine combustion for a long time, it is recommended to create conditions for sufficient engine combustion on the next planned trip. Users can evaluate the warm reminder service, and the warm reminder service function will be continuously optimized and improved based on user evaluation content.

[0113] In an embodiment of this application, a carbon deposit reminder function is further provided. By recording the duration of a single engine run, it can be determined whether the user is ensuring sufficient engine combustion each time. If the number of incomplete engine combustion exceeds a preset threshold, a reminder message is sent to the user, thereby changing the user's driving habits, reducing the risk of carbon deposits, and improving the user experience.

[0114] In summary, the technical solutions provided by the embodiments of the present application have the following beneficial effects:

[0115] (1) Based on the user's actual vehicle usage scenario, the system identifies the user's demand for the vehicle's driving mode and intelligently adjusts the vehicle's driving mode to avoid engine shutdown caused by manual switching to EV mode after a short engine start, thereby optimizing the user's vehicle experience.

[0116] (2) Real-time monitoring of the vehicle's operating status. When it is determined through vehicle network big data computing technology that the vehicle cannot maintain a completely pure electric state to reach the destination, and the remaining planned route cannot meet the conditions for full engine combustion when switching to HEV mode, the power reserve will be increased, and the vehicle will be switched to HEV mode in advance to start the engine and ensure full combustion.

[0117] (3) For vehicles with a long-term problem of insufficient engine combustion, we will proactively provide a warm reminder service. Users can evaluate the warm reminder service, and the warm reminder service function will be continuously optimized and improved based on the user evaluation content.

[0118] (4) Through intelligent switching of vehicle driving modes, intelligent adjustment of forced power conservation, and warm reminders when the engine is not fully burned for a long time, the problem of engine carbon deposits caused by short engine start time and long-term incomplete combustion can be effectively reduced.

[0119] Example 2:

[0120] like Figure 6 As shown, the second embodiment provides a driving mode control system for a plug-in hybrid electric vehicle, including a first acquisition module 10, a starting module 20, a second acquisition module 30, a judgment module 40 and a mode switching module 50;

[0121] Wherein, the first acquisition module 10 is used to acquire the historical status information of the vehicle when the vehicle is started;

[0122] The starting module 20 is used to control the vehicle to start in EV mode or HEV mode according to the historical state information;

[0123] The second acquisition module 30 is used to acquire the current state information and navigation information of the vehicle when the vehicle is traveling in EV mode and the current power is greater than the mandatory power conservation power;

[0124] The judgment module 40 is used to judge whether the vehicle meets the preset driving mode switching condition according to the current state information and the navigation information;

[0125] The mode switching module 50 is configured to switch the driving mode of the vehicle to the HEV mode if the driving mode switching condition is met.

[0126] In one possible implementation, when the vehicle is started, the first acquisition module 10 acquires the historical status information of the vehicle, including:

[0127] When the vehicle is running, continuously uploading historical operation data, the historical operation data including vehicle driving mode, vehicle operation mode, battery power, forced power conservation power and engine speed;

[0128] After data cleaning and data slicing of the historical operation data, power-on segment data and charging segment data are constructed;

[0129] Storing the power-on segment data and the charging segment data in a preset database;

[0130] When the vehicle is started, the vehicle's last power-on segment data and charging segment data are obtained from the database, and the power-on process information and charging process information are obtained by analysis;

[0131] The historical status information is constructed by combining the power-on process information and the charging process information.

[0132] In one possible implementation, the starting module 20 controls the vehicle to start in the EV mode or the HEV mode according to the historical state information, including:

[0133] determining, based on power-on process information in the historical status information, whether the vehicle is in HEV mode at the time of power-off, and if not, controlling the vehicle to start in EV mode;

[0134] If it is determined that the vehicle is in the HEV mode at the time of power-off, determining whether the HEV mode is automatically switched by the system due to forced power conservation based on the power-on process information, and if not, controlling the vehicle to start in the HEV mode;

[0135] If it is determined that the vehicle is in HEV mode at the time of power-off, and the HEV mode is automatically switched by the system due to forced power preservation, then based on the charging process information in the historical status information, it is determined whether the vehicle has charging behavior after the power-off time. If there is charging behavior, the vehicle is controlled to start in EV mode, otherwise the vehicle is controlled to start in HEV mode.

[0136] In one possible implementation, the determination module 40 determines whether the vehicle meets a preset driving mode switching condition based on the current state information and the navigation information, including:

[0137] determining, based on the current state information and the navigation information, whether the remaining driving time is equal to a preset engine full combustion time;

[0138] If the remaining driving time is equal to the engine full combustion time, predicting whether the vehicle has a carbon deposition risk based on the current state information and the navigation information;

[0139] If it is predicted that the vehicle has a carbon deposit risk, it is determined that the vehicle meets a preset driving mode switching condition.

[0140] Furthermore, the determining, based on the current state information and the navigation information, whether the remaining driving time is equal to a preset engine full combustion time includes:

[0141] calculating a first remaining distance between the vehicle and a destination based on the current state information and the navigation information;

[0142] predicting a first remaining travel time of the vehicle based on the current state information and the first remaining distance;

[0143] It is determined whether the first remaining driving time is equal to the engine sufficient combustion time.

[0144] Furthermore, the predicting whether the vehicle has a carbon deposition risk based on the current state information and the navigation information includes:

[0145] calculating a first remaining distance between the vehicle and a destination based on the current state information and the navigation information;

[0146] Calculating a pure electric cruising range of the vehicle based on the current state information, where the pure electric cruising range is the mileage traveled by the vehicle during a process in which the battery power level is increased from the current power level to the mandatory power conservation level;

[0147] If the pure electric cruising range is less than the first remaining range, predicting a second remaining driving time after the vehicle automatically switches to the HEV mode in the mandatory power conservation state based on the current state information and the second remaining range, where the second remaining range is the difference between the first remaining range and the pure electric cruising range;

[0148] If the second remaining driving time is less than the engine full combustion time, it is predicted that the vehicle has a carbon deposit risk.

[0149] Furthermore, if the driving mode switching condition is satisfied, the mode switching module 50 switches the driving mode of the vehicle to the HEV mode, including:

[0150] The forced power conservation power is set to the current power, thereby triggering the forced power conservation function of the vehicle, thereby automatically switching the driving mode of the vehicle to the HEV mode.

[0151] In a possible implementation, the driving mode control system further includes a prompt module, which includes a single running time recording unit, an accumulation unit, and a prompt unit;

[0152] The single operation time recording unit is used to record the single operation time of the engine when the vehicle is traveling in the HEV mode;

[0153] The accumulating unit is used to accumulate the number of times of incomplete combustion of the engine whenever the single operation time is less than the preset engine complete combustion time;

[0154] The prompt unit is used to send a prompt message to a preset device if the number of incomplete combustion of the engine is greater than a preset threshold.

[0155] The more detailed working principle and process flow of this embodiment can be referred to, but not limited to, the relevant records of the first embodiment.

[0156] The specific embodiments described above further illustrate the objectives, technical solutions, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this application and are not intended to limit the scope of protection of this application. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application by those skilled in the art should be included within the scope of protection of this application.

Claims

1. A driving mode control method for a plug-in hybrid electric vehicle, characterized in that: include: When the vehicle is started, obtain the historical status information of the vehicle; controlling the vehicle to start in EV mode or HEV mode according to the historical state information; When the vehicle is running in EV mode and the current power is greater than the mandatory power reserve, obtain the vehicle's current status information and navigation information; Determining whether the vehicle meets a preset driving mode switching condition based on the current state information and the navigation information includes: determining whether a remaining driving time is equal to a preset engine full combustion time based on the current state information and the navigation information; if the remaining driving time is equal to the engine full combustion time, predicting whether the vehicle has a carbon deposition risk based on the current state information and the navigation information; and if the vehicle is predicted to have a carbon deposition risk, determining that the vehicle meets the preset driving mode switching condition; The determining, based on the current state information and the navigation information, whether the remaining travel time is equal to a preset engine full combustion time includes: calculating a first remaining distance between the vehicle and a destination based on the current state information and the navigation information; predicting a first remaining travel time of the vehicle based on the current state information and the first remaining distance; and determining whether the first remaining travel time is equal to the engine full combustion time. The predicting whether the vehicle has a carbon deposit risk based on the current state information and the navigation information includes: calculating a first remaining distance between the vehicle and a destination based on the current state information and the navigation information; calculating a pure electric cruising range of the vehicle based on the current state information, the pure electric cruising range being the distance traveled by the vehicle during the process of using the battery from the current power level to the forced power conservation power level; if the pure electric cruising range is less than the first remaining distance, predicting a second remaining driving time after the vehicle automatically switches to the HEV mode under the forced power conservation state based on the current state information and the second remaining distance, the second remaining distance being the difference between the first remaining distance and the pure electric cruising range; if the second remaining driving time is less than the engine full combustion time, predicting that the vehicle has a carbon deposit risk; If the driving mode switching condition is satisfied, the driving mode of the vehicle is switched to the HEV mode.

2. The driving mode control method of a plug-in hybrid electric vehicle according to claim 1, wherein: When the vehicle is started, obtaining the historical status information of the vehicle includes: When the vehicle is running, continuously uploading historical operation data, the historical operation data including vehicle driving mode, vehicle operation mode, battery power, forced power conservation power and engine speed; After data cleaning and data slicing of the historical operation data, power-on segment data and charging segment data are constructed; Storing the power-on segment data and the charging segment data in a preset database; When the vehicle is started, the vehicle's last power-on segment data and charging segment data are obtained from the database, and the power-on process information and charging process information are obtained by analysis; The historical status information is constructed by combining the power-on process information and the charging process information.

3. The driving mode control method of a plug-in hybrid electric vehicle according to claim 1, wherein: The controlling the vehicle to start in the EV mode or the HEV mode according to the historical state information includes: determining, based on power-on process information in the historical status information, whether the vehicle is in HEV mode at the time of power-off, and if not, controlling the vehicle to start in EV mode; If it is determined that the vehicle is in the HEV mode at the time of power-off, determining whether the HEV mode is automatically switched by the system due to forced power conservation based on the power-on process information, and if not, controlling the vehicle to start in the HEV mode; If it is determined that the vehicle is in HEV mode at the time of power-off, and the HEV mode is automatically switched by the system due to forced power preservation, then based on the charging process information in the historical status information, it is determined whether the vehicle has charging behavior after the power-off time. If there is charging behavior, the vehicle is controlled to start in EV mode, otherwise the vehicle is controlled to start in HEV mode.

4. The driving mode control method of a plug-in hybrid electric vehicle according to claim 1, wherein: If the driving mode switching condition is satisfied, switching the driving mode of the vehicle to the HEV mode includes: The forced power conservation power is set to the current power, thereby triggering the forced power conservation function of the vehicle, thereby automatically switching the driving mode of the vehicle to the HEV mode.

5. The driving mode control method of a plug-in hybrid electric vehicle according to claim 1, wherein: The driving mode control method further includes: When the vehicle is traveling in the HEV mode, recording a single running time of the engine; Whenever the single operation time is less than the preset engine full combustion time, the number of engine incomplete combustion times is accumulated; If the number of incomplete combustion events of the engine exceeds a preset threshold, a prompt message is sent to the preset device.

6. A drive mode control system for a plug-in hybrid electric vehicle, characterized in that: It includes a first acquisition module, a start module, a second acquisition module, a judgment module and a mode switching module; Wherein, the first acquisition module is used to acquire historical status information of the vehicle when the vehicle is started; The starting module is used to control the vehicle to start in EV mode or HEV mode according to the historical state information; The second acquisition module is used to acquire the current state information and navigation information of the vehicle when the vehicle is traveling in EV mode and the current power is greater than the mandatory power conservation power; The judgment module is configured to judge whether the vehicle satisfies a preset driving mode switching condition based on the current state information and the navigation information, including: judging whether a remaining driving time is equal to a preset engine full combustion time based on the current state information and the navigation information; if the remaining driving time is equal to the engine full combustion time, predicting whether the vehicle has a carbon deposition risk based on the current state information and the navigation information; and if the vehicle is predicted to have a carbon deposition risk, determining that the vehicle satisfies the preset driving mode switching condition; The determining, based on the current state information and the navigation information, whether the remaining travel time is equal to a preset engine full combustion time includes: calculating a first remaining distance between the vehicle and a destination based on the current state information and the navigation information; predicting a first remaining travel time of the vehicle based on the current state information and the first remaining distance; and determining whether the first remaining travel time is equal to the engine full combustion time. The predicting whether the vehicle has a carbon deposit risk based on the current state information and the navigation information includes: calculating a first remaining distance between the vehicle and a destination based on the current state information and the navigation information; calculating a pure electric cruising range of the vehicle based on the current state information, the pure electric cruising range being the distance traveled by the vehicle during the process of using the battery from the current power level to the forced power conservation power level; if the pure electric cruising range is less than the first remaining distance, predicting a second remaining driving time after the vehicle automatically switches to the HEV mode under the forced power conservation state based on the current state information and the second remaining distance, the second remaining distance being the difference between the first remaining distance and the pure electric cruising range; if the second remaining driving time is less than the engine full combustion time, predicting that the vehicle has a carbon deposit risk; The mode switching module is configured to switch the driving mode of the vehicle to the HEV mode if the driving mode switching condition is met.

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