Driving mode control method and system of plug-in hybrid electric vehicle

Abstract

The invention provides a driving mode control method and system for a plug-in hybrid electric vehicle, and the method comprises the steps: obtaining the historical state information of the vehicle when the vehicle is started; controlling the vehicle to start in an EV mode or an HEV mode according to the historical state information; when the vehicle travels in the EV mode and the current electric quantity is larger than the forced power protection electric quantity, the current state information and navigation information of the vehicle are obtained; judging whether the vehicle meets a preset driving mode switching condition or not according to the current state information and the navigation information; and if the driving mode switching condition is met, the driving mode of the vehicle is switched to an HEV mode, carbon deposition of an engine of the plug-in hybrid electric vehicle is effectively prevented, and the service life of the engine of the plug-in hybrid electric vehicle is prolonged.

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] The driving modes of plug-in hybrid electric vehicles are usually divided into EV (pure electric mode) mode and HEV mode (hybrid electric mode). The switching methods between EV mode and HEV mode are mainly manual switching and automatic switching. Automatic switching is usually performed by the system based on the power conservation threshold (the threshold can be set by the user or by the system default). When the current power of the vehicle is lower than the power conservation level, it switches to HEV mode. In the current mainstream plug-in hybrid electric vehicle models, automatic switching only supports switching from EV mode to HEV mode. To switch from HEV mode to EV mode, manual switching is required.

[0003] Compared with fuel vehicles, the engines of plug-in hybrid vehicles are not always kept in the starting state. In a single power-on cycle, the engine may start briefly and then switch to EV mode or the vehicle may be directly powered off, resulting in the engine starting time being too short and the fuel not being fully burned. Incompletely burned fuel will form carbon deposits inside the engine, which will be deposited in the engine's intake duct, combustion chamber wall, spark plugs and other parts. Long-term accumulation may cause wear and damage to engine parts, such as valves and pistons, which not only affects the service life of the engine, but may also cause the vehicle to fail to start normally.

[0004] In the current mainstream plug-in hybrid vehicles, there are mainly two vehicle usage 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 the forced power preservation. The HEV mode is maintained at the next power-on, but the vehicle is charged during the two power-ons. As a result, the user immediately manually switches to EV mode after noticing when the engine starts, causing the engine start time to be 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 view of 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 engine of the plug-in hybrid vehicle and improve the service life of the engine of the plug-in hybrid vehicle.

[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, the historical status information of the vehicle is obtained;

[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 conservation power, the current status information and navigation information of the vehicle are obtained;

[0010] determining whether the vehicle meets a preset driving mode switching condition according to 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 embodiment of the present application provides a driving mode control method for a plug-in hybrid electric vehicle, which controls the driving mode of the vehicle according to relevant information when the vehicle is started and when it is driving, thereby avoiding the carbon deposition problem caused by insufficient engine combustion and improving the service life of the plug-in hybrid electric vehicle engine. Specifically, when the vehicle is started, the user's last vehicle usage scenario is determined by analyzing the historical status information of the vehicle, and then the vehicle is actively controlled to start in EV mode or HEV mode. Compared with the method of starting in the default mode or the last driving mode in the prior art, the embodiment of the present application can actively predict the user's demand mode, avoiding the problem that the user immediately manually switches to EV mode after the vehicle is started in HEV mode, resulting in the problem of too short engine start time. When the vehicle is driving in EV mode, if the current power is greater than the mandatory power conservation power, the driving mode may be automatically switched. In this scenario, it is easy to cause the vehicle to arrive at the destination before the engine is fully burned after the driving mode is switched, and the power is turned off to terminate the engine operation. Therefore, the vehicle's driving process is predicted based on the current state 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 so that the engine can be fully burned, preventing carbon deposits in the plug-in hybrid vehicle engine and increasing the service life of the plug-in hybrid vehicle engine.

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

[0014] When the vehicle is running, historical operation data is continuously uploaded, and the historical operation data includes vehicle driving mode, vehicle operation mode, battery power, compulsory 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 and obtained;

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

[0017] When the vehicle is started, the last power-on segment data and charging segment data of the vehicle 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 performing data cleaning and data slicing on historical data in advance, power-on segment data and charging segment data are obtained, and then the vehicle's last power-on process information and charging process information can be analyzed based on the power-on segment data and charging segment data, providing a data basis for the drive mode selection when the vehicle is started next time. In addition, the power-on segment data and charging segment data of 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 operation logic of automatic selection or automatic switching of the drive mode.

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

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

[0022] If it is determined that the vehicle is in the HEV mode at the time of power-off, judging whether the HEV mode is automatically switched by the system due to forced power conservation according to 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 any charging behavior after the power-off time. If there is any charging behavior, the vehicle is controlled to start in EV mode, otherwise the vehicle is controlled to start in HEV mode.

[0024] The embodiment of the present application provides a method for controlling a vehicle to start in a certain driving mode according to historical status information. First, the driving mode of the vehicle at the time of power-off is determined according to the power-on process information. If the vehicle is in EV mode at the time of power-off, there is no risk of carbon deposition when the vehicle is started, and the vehicle can be started without intervention, so that the vehicle is still started in EV mode; if the vehicle is in HEV mode at the time of power-off, it is necessary to consider whether the user will manually switch to EV mode when the vehicle is started, that is, predict the user's driving mode demand. At this time, it is necessary to further analyze the reason why the vehicle switches to HEV mode. If it is manually switched by the user, it means that the user's current driving mode demand is HEV mode. In order to ensure the user's experience, it is still started in HEV mode; if the HEV mode is automatically switched by the system due to forced power preservation, it is necessary to further combine the charging process information for judgment. If the user has charging behavior after powering off, it can be determined that the user's current mode demand is EV mode, and the vehicle is controlled to start in EV mode; if there is no charging behavior, it is started in HEV mode. Since the vehicle triggers forced power preservation, the user cannot manually switch to EV mode in a short time, which ensures sufficient combustion time of the engine and avoids the risk of carbon deposition.

[0025] In a possible implementation, judging whether the vehicle satisfies a preset driving mode switching condition according to the current state information and the navigation information includes:

[0026] Determining whether the remaining driving time is equal to a preset engine full combustion time according to the current state information and the navigation information;

[0027] If the remaining driving time is equal to the engine full combustion time, predicting whether the vehicle has a carbon deposition risk according to 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 condition is 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 deposition 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 engine carbon deposition problem be avoided by driving switching. If it is predicted whether the vehicle has a carbon deposition risk first, when it is found that there is a carbon deposition risk, it is very likely that the remaining driving time of the vehicle does not meet 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 a 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] Further, judging whether the remaining driving time is equal to a preset engine full combustion time according to the current state information and the navigation information includes:

[0031] Calculating a first remaining distance between the vehicle and a destination according to the current state information and the navigation information;

[0032] Predicting a first remaining travel time of the vehicle according to 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] Further, predicting whether the vehicle has a carbon deposition risk according to the current state information and the navigation information includes:

[0035] Calculating a first remaining distance between the vehicle and a destination according to the current state information and the navigation information;

[0036] Calculating the pure electric cruising range of the vehicle according to the current state information, the pure electric cruising range being the mileage traveled by the vehicle when the battery is used from the current power to the mandatory power conservation power;

[0037] 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 in the mandatory power conservation state according to 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;

[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 according to 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 the 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 been 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 drive mode, after determining that there is a risk of carbon deposits, the vehicle's drive mode can be immediately switched to the 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 met, 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 the embodiment of the present application, when the drive mode is switched, the automatic drive mode switching function of the vehicle 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 a 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 of the engine is greater than the preset threshold, a prompt message is sent to the preset device.

[0047] In the embodiment of the present application, a carbon deposit reminder function is further provided. By recording the single running time of the engine, it can be judged whether the user allows the engine to fully burn each time the engine is used. When the number of incomplete combustion of the engine is greater than the preset threshold, a reminder message is sent to the user to change the user's driving habits, reduce the risk of carbon deposits, and improve the user's 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 running in EV mode and the current power is greater than the mandatory power conservation power;

[0052] The judging 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] Further, the judging module judging whether the vehicle satisfies a preset driving mode switching condition according to the current state information and the navigation information includes:

[0055] Determining whether the remaining driving time is equal to a preset engine full combustion time according to the current state information and the navigation information;

[0056] If the remaining driving time is equal to the engine full combustion time, predicting whether the vehicle has a carbon deposition risk according to 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 for 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 the process of 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 schematic 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 drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0065] It should be noted that the step numbers in the text are only for the convenience of explanation of the specific embodiments and do not serve to limit the order in which the steps are executed. In the description of this application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0066] Embodiment 1:

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

[0068] Step S1, when the vehicle is started, obtaining 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 status information;

[0070] Step S3: when the vehicle is running in EV mode and the current power is greater than the mandatory power conservation power, obtaining the current state information and navigation information of the vehicle;

[0071] Step S4, judging whether the vehicle meets a preset driving mode switching condition according to 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 embodiment of the present application provides a driving mode control method for a plug-in hybrid electric vehicle, which controls the driving mode of the vehicle according to relevant information when the vehicle is started and when it is driving, thereby avoiding the carbon deposition problem caused by insufficient engine combustion and improving the service life of the plug-in hybrid electric vehicle engine. Specifically, when the vehicle is started, the user's last vehicle usage scenario is determined by analyzing the historical status information of the vehicle, and then the vehicle is actively controlled to start in EV mode or HEV mode. Compared with the method of starting in the default mode or the last driving mode in the prior art, the embodiment of the present application can actively predict the user's demand mode, avoiding the problem that the user immediately manually switches to EV mode after the vehicle is started in HEV mode, resulting in the problem of too short engine start time. When the vehicle is driving in EV mode, if the current power is greater than the mandatory power conservation power, the driving mode may be automatically switched. In this scenario, it is easy to cause the vehicle to arrive at the destination before the engine is fully burned after the driving mode is switched, and the power is turned off to terminate the engine operation. Therefore, the vehicle's driving process is predicted based on the current state 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 so that the engine can be fully burned, preventing carbon deposits in the plug-in hybrid vehicle engine and increasing the service life of the plug-in hybrid vehicle engine.

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

[0075] When the vehicle is running, historical operation data is continuously uploaded, and the historical operation data includes vehicle driving mode, vehicle operation mode, battery power, compulsory 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 and obtained;

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

[0078] When the vehicle is started, the last power-on segment data and charging segment data of the vehicle 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 in the figure, the vehicle will upload its status information such as vehicle driving mode, vehicle operation mode, battery power, compulsory power conservation power, engine speed, etc. to the system cloud, and the cloud will clean and pre-process the data. The big data calculation module determines the processed data and whether the vehicle operation mode is in the driving / charging state, slices the data into power-on and charging segments, and stores the calculation results in the database.

[0081] In the embodiment of the present application, by performing data cleaning and data slicing on historical data in advance, power-on segment data and charging segment data are obtained, and then the vehicle's last power-on process information and charging process information can be analyzed based on the power-on segment data and charging segment data, providing a data basis for the drive mode selection when the vehicle is started next time. In addition, the power-on segment data and charging segment data of 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 operation logic of automatic selection or automatic switching of the drive mode.

[0082] In a 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] According to the power-on process information in the historical status information, determining whether the vehicle is in the HEV mode at the time of power-off, and if not, controlling the vehicle to start in the EV mode;

[0084] If it is determined that the vehicle is in the HEV mode at the time of power-off, judging whether the HEV mode is automatically switched by the system due to forced power conservation according to 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 any charging behavior after the power-off time. If there is any 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 to obtain the current vehicle information status; 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 conservation 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 conservation 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 the system will switch the vehicle drive mode to EV mode.

[0087] The embodiment of the present application provides a method for controlling a vehicle to start in a certain driving mode according to historical status information. First, the driving mode of the vehicle at the time of power-off is determined according to the power-on process information. If the vehicle is in EV mode at the time of power-off, there is no risk of carbon deposition when the vehicle is started, and the vehicle can be started without intervention, so that the vehicle is still started in EV mode; if the vehicle is in HEV mode at the time of power-off, it is necessary to consider whether the user will manually switch to EV mode when the vehicle is started, that is, predict the user's driving mode demand. At this time, it is necessary to further analyze the reason why the vehicle switches to HEV mode. If it is manually switched by the user, it means that the user's current driving mode demand is HEV mode. In order to ensure the user's experience, it is still started in HEV mode; if the HEV mode is automatically switched by the system due to forced power preservation, it is necessary to further combine the charging process information for judgment. If the user has charging behavior after powering off, it can be determined that the user's current mode demand is EV mode, and the vehicle is controlled to start in EV mode; if there is no charging behavior, it is started in HEV mode. Since the vehicle triggers forced power preservation, the user cannot manually switch to EV mode in a short time, which ensures sufficient combustion time of the engine and avoids the risk of carbon deposition.

[0088] In a possible implementation, in step S4, judging whether the vehicle satisfies a preset driving mode switching condition according to the current state information and the navigation information includes:

[0089] Determining whether the remaining driving time is equal to a preset engine full combustion time according to the current state information and the navigation information;

[0090] If the remaining driving time is equal to the engine full combustion time, predicting whether the vehicle has a carbon deposition risk according to 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 condition is 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 deposition 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 engine carbon deposition problem be avoided by driving switching. If it is predicted whether the vehicle has a carbon deposition risk first, when it is found that there is a carbon deposition risk, it is very likely that the remaining driving time of the vehicle does not meet 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 a 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] Further, judging whether the remaining driving time is equal to a preset engine full combustion time according to the current state information and the navigation information includes:

[0094] Calculating a first remaining distance between the vehicle and a destination according to the current state information and the navigation information;

[0095] Predicting a first remaining travel time of the vehicle according to 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] Further, predicting whether the vehicle has a carbon deposition risk according to the current state information and the navigation information includes:

[0098] Calculating a first remaining distance between the vehicle and a destination according to the current state information and the navigation information;

[0099] Calculating the pure electric cruising range of the vehicle according to the current state information, the pure electric cruising range being the mileage traveled by the vehicle when the battery is used from the current power to the mandatory power conservation power;

[0100] 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 in the mandatory power conservation state according to 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;

[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 according to 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 the 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 been 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 drive mode, after determining that there is a risk of carbon deposits, the vehicle's drive mode can be immediately switched to the 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 met, 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 the embodiment of the present application, when the drive mode is switched, the automatic drive mode switching function of the vehicle 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 completely maintain pure electric mode to the destination, and the remaining planned route cannot meet the conditions for sufficient engine combustion when switching to HEV mode, the forced power conservation power will be increased, and the mode will be switched to HEV mode in advance to start the engine for full combustion.

[0107] The specific implementation method is: obtain the current vehicle status information and navigation route information to determine whether the vehicle is currently in EV mode; for vehicles in EV mode, under the condition that the current power of the vehicle is greater than the preset mandatory power conservation power, calculate in real time the pure electric range between the current power and the preset mandatory power conservation power and the first remaining distance between the current position and the planned destination, recorded as a and b respectively; calculate in real time the estimated time to the planned destination and the driving conditions, and for vehicles whose remaining conditions just meet the engine's full combustion conditions, determine the size of a and b. If a is less than b, it is determined that there is a risk of carbon deposition. Adjust the current power to the mandatory power conservation power so that the vehicle's driving mode switches from EV mode to HEV mode in advance.

[0108] In a 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 of the engine is greater than the preset threshold, a prompt message is sent to the preset device.

[0112] In a preferred embodiment, Figure 5 As shown, for vehicles that have already had insufficient engine combustion, the historical vehicle usage data is calculated to determine whether the engine was started and fully burned during each use of the vehicle. For vehicles with insufficient engine combustion times greater than or equal to 10 times (when it is determined that the engine is fully burned, the data is cleared and recalculated), a warm reminder is proactively issued to remind users that the vehicle has not had sufficient engine combustion for a long time. In order to avoid carbon deposits caused by insufficient engine combustion for a long time, it is recommended to create conditions for sufficient engine combustion in the next planned trip. Users can evaluate the warm reminder service, and the warm reminder service function is continuously optimized and improved based on user evaluation content.

[0113] In the embodiment of the present application, a carbon deposit reminder function is further provided. By recording the single running time of the engine, it can be judged whether the user allows the engine to fully burn each time the engine is used. When the number of incomplete combustion of the engine is greater than the preset threshold, a reminder message is sent to the user to change the user's driving habits, reduce the risk of carbon deposits, and improve the user's experience.

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

[0115] (1) Based on the user's actual vehicle usage scenario, the system identifies the user's needs 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 the engine is started for a short time, thereby optimizing the user's vehicle usage 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 full electric power to reach the destination and that the remaining planned route cannot meet the conditions for full engine combustion when switching to HEV mode, the vehicle's power conservation capacity 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 problems of incomplete engine combustion for a long time, we will proactively provide warm reminder services. Users can evaluate the warm reminder services, 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 mandatory power conservation, and warm reminders when the engine has not been fully burned for a long time, the engine carbon deposit problem caused by short engine start time and long-term incomplete combustion can be effectively reduced.

[0119] Embodiment 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 start 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 judging module 40 is used to judge whether the vehicle meets a 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 a 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, historical operation data is continuously uploaded, and the historical operation data includes vehicle driving mode, vehicle operation mode, battery power, compulsory 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 and obtained;

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

[0130] When the vehicle is started, the last power-on segment data and charging segment data of the vehicle 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 a 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] According to the power-on process information in the historical status information, determining whether the vehicle is in the HEV mode at the time of power-off, and if not, controlling the vehicle to start in the EV mode;

[0134] If it is determined that the vehicle is in the HEV mode at the time of power-off, judging whether the HEV mode is automatically switched by the system due to forced power conservation according to 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 any charging behavior after the power-off time. If there is any charging behavior, the vehicle is controlled to start in EV mode, otherwise the vehicle is controlled to start in HEV mode.

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

[0137] Determining whether the remaining driving time is equal to a preset engine full combustion time according to the current state information and the navigation information;

[0138] If the remaining driving time is equal to the engine full combustion time, predicting whether the vehicle has a carbon deposition risk according to 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] Further, judging whether the remaining driving time is equal to a preset engine full combustion time according to the current state information and the navigation information includes:

[0141] Calculating a first remaining distance between the vehicle and a destination according to the current state information and the navigation information;

[0142] Predicting a first remaining travel time of the vehicle according to 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] Further, predicting whether the vehicle has a carbon deposition risk according to the current state information and the navigation information includes:

[0145] Calculating a first remaining distance between the vehicle and a destination according to the current state information and the navigation information;

[0146] Calculating the pure electric cruising range of the vehicle according to the current state information, the pure electric cruising range being the mileage traveled by the vehicle when the battery is used from the current power to the mandatory power conservation power;

[0147] 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 in the mandatory power conservation state according to 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;

[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 met, 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 incomplete combustion of the engine whenever the single operation duration is less than the preset engine complete combustion duration;

[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 step flow of this embodiment can refer to, but are not limited to, the relevant records of Embodiment 1.

[0156] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A driving mode control method for a plug-in hybrid electric vehicle, characterized in that: include: When the vehicle is started, the historical status information of the vehicle is obtained; 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 conservation power, the current status information and navigation information of the vehicle are obtained; determining whether the vehicle meets a preset driving mode switching condition according to the current state information and the navigation information; 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, characterized in that: When the vehicle is started, the historical status information of the vehicle is obtained, including: When the vehicle is running, historical operation data is continuously uploaded, and the historical operation data includes vehicle driving mode, vehicle operation mode, battery power, compulsory 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 and obtained; Storing the power-on segment data and the charging segment data in a preset database; When the vehicle is started, the last power-on segment data and charging segment data of the vehicle 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, characterized in that: The controlling the vehicle to start in the EV mode or the HEV mode according to the historical state information includes: According to the power-on process information in the historical status information, determining whether the vehicle is in the HEV mode at the time of power-off, and if not, controlling the vehicle to start in the EV mode; If it is determined that the vehicle is in the HEV mode at the time of power-off, judging whether the HEV mode is automatically switched by the system due to forced power conservation according to 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 any charging behavior after the power-off time. If there is any 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, characterized in that: The determining, according to the current state information and the navigation information, whether the vehicle satisfies a preset driving mode switching condition comprises: Determining whether the remaining driving time is equal to a preset engine full combustion time according to 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 according to the current state information and the navigation information; 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.

5. The driving mode control method of a plug-in hybrid electric vehicle as claimed in claim 4, characterized in that: 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: Calculating a first remaining distance between the vehicle and a destination according to the current state information and the navigation information; Predicting a first remaining travel time of the vehicle according to the current state information and the first remaining distance; It is determined whether the first remaining driving time is equal to the engine sufficient combustion time.

6. A driving mode control method for a plug-in hybrid electric vehicle as claimed in claim 4, characterized in that: The predicting whether the vehicle has a carbon deposition risk according to the current state information and the navigation information includes: Calculating a first remaining distance between the vehicle and a destination according to the current state information and the navigation information; Calculating the pure electric cruising range of the vehicle according to the current state information, the pure electric cruising range being the mileage traveled by the vehicle when the battery is used from the current power to the mandatory power conservation power; 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 in the mandatory power conservation state according to 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, it is predicted that the vehicle has a carbon deposit risk.

7. The driving mode control method of a plug-in hybrid electric vehicle according to claim 1, characterized in that: If the driving mode switching condition is met, 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.

8. The driving mode control method of a plug-in hybrid electric vehicle as claimed in claim 1, characterized in that: 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 of the engine is greater than the preset threshold, a prompt message is sent to the preset device.

9. A driving 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 running in EV mode and the current power is greater than the mandatory power conservation power; The judging 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; 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.

10. A driving mode control system for a plug-in hybrid electric vehicle as claimed in claim 9, characterized in that: The judging module judging whether the vehicle satisfies a preset driving mode switching condition according to the current state information and the navigation information includes: Determining whether the remaining driving time is equal to a preset engine full combustion time according to 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 according to the current state information and the navigation information; 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.

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