Engine control methods, devices, equipment, storage media and program products

Abstract

This application relates to an engine control method, apparatus, device, storage medium, and program product, and pertains to the field of electric vehicle technology. The method is executed by the vehicle's control system, where the vehicle is a hybrid electric vehicle. The method includes: acquiring first reference information when the vehicle is in motion and the engine is off; the first reference information includes at least the engine's inactivity duration; controlling the engine to enter an automatic start mode when the first reference information meets the first preset condition; the first preset condition includes at least the engine's inactivity duration meeting a duration setting condition; in the automatic start mode, the engine is running; acquiring second reference information while the engine is in the automatic start mode; and controlling the engine to exit the automatic start mode when the second reference information meets the second preset condition. This application adds an engine automatic start maintenance function when the engine is not started for an extended period.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, and in particular to an engine control method, device, equipment, storage medium and program product. BACKGROUND

[0002] A hybrid vehicle is a vehicle that combines a traditional engine and an electric motor as two power sources. The control system of the vehicle can distribute power between the electric motor and the engine according to the driving state of the vehicle (such as speed, load, accelerator pedal position, etc.), or make the electric motor and the engine work together.

[0003] In the related art, a plug-in hybrid vehicle corresponds to two driving modes: EV mode and HEV mode. In the EV mode, the engine is not started, and the vehicle can be driven only by relying on the power battery; in the HEV mode, the engine can drive the vehicle and charge the power battery.

[0004] However, in order to reduce emissions when using the engine as a power source, in some working conditions, such as urban working conditions with sufficient power battery capacity, the control system of the vehicle can turn off the engine, which may result in that the engine is not effectively lubricated and protected, and the service life of the engine is affected. SUMMARY

[0005] The present application provides an engine control method, device, equipment, storage medium and program product, which increases the engine self-starting maintenance function to protect the engine in the case that the engine is not started for a long time. The technical solution content is as follows:

[0006] According to an aspect of the present application, an engine control method is provided, which is executed by a control system of a vehicle, the vehicle being a hybrid electric vehicle, and the method comprising:

[0007] In the case that the vehicle is in a driving state and the engine of the vehicle is in an off state, first reference information is obtained; the first reference information at least includes the non-starting duration of the engine;

[0008] In the case that the first reference information meets a first set condition, the engine is controlled to enter a self-starting mode; the first set condition at least includes that the non-starting duration of the engine meets a duration set condition; in the self-starting mode, the engine is in a running state;

[0009] In the case that the engine is in the self-starting mode, second reference information is obtained;

[0010] In the case that the second reference information meets a second set condition, the engine is controlled to exit the self-starting mode.

[0011] According to an aspect of the present application, an engine control device is provided, which comprises:

[0012] a first acquisition module, configured to acquire first reference information when the vehicle is in a running state and an engine of the vehicle is in an off state, wherein the first reference information at least comprises an unstart duration of the engine;

[0013] a first control module, configured to control the engine to enter a self-start mode when the first reference information meets a first set condition, wherein the first set condition at least comprises that the unstart duration of the engine meets a duration set condition, and in the self-start mode, the engine is in a running state;

[0014] a second acquisition module, configured to acquire second reference information when the engine is in the self-start mode;

[0015] a second control module, configured to control the engine to exit the self-start mode when the second reference information meets a second set condition.

[0016] In some embodiments, the first reference information further comprises a power system state, a front hood state, an oil amount, a cumulative mileage, and a vehicle speed;

[0017] the first set condition further comprises that the power system state meets a set state, the front hood is in a closed state, the oil amount meets an oil amount set condition, the cumulative mileage meets a mileage set condition, and the vehicle speed meets a vehicle speed set condition;

[0018] the second reference information comprises at least one of the power system state, a water temperature of the engine, and the oil amount;

[0019] the second set condition comprises at least one of that the power system state does not meet the set state, the water temperature of the engine meets a water temperature set condition, and the oil amount does not meet the oil amount set condition.

[0020] In some embodiments, the control system comprises a whole vehicle controller HCU management unit, and an instrument controller ICM management unit, a body controller BCM management unit, an audio host controller IHU management unit, and an engine controller EMS management unit connected to the HCU management unit;

[0021] the first acquisition module is configured to:

[0022] In the case that the first reference information comprises the length of time when the engine is not started, the IHU management unit sends a date signal to the HCU management unit; the date signal is used by the HCU management unit to calculate the length of time when the engine is not started;

[0023] In the case that the first reference information comprises the power system state, the HCU management unit acquires the power system state;

[0024] In the case that the first reference information comprises the front hood state, the BCM management unit sends a front hood state signal to the HCU management unit; the front hood state signal is used by the HCU management unit to acquire the front hood state;

[0025] In the case that the first reference information comprises the oil level, the ICM management unit sends an oil level signal to the HCU management unit; the oil level signal is used by the HCU management unit to acquire the oil level;

[0026] In the case that the first reference information comprises the cumulative mileage, the ICM management unit sends a mileage signal to the HCU management unit; the mileage signal is used by the HCU management unit to acquire the cumulative mileage;

[0027] In the case that the first reference information comprises the vehicle speed, the ICM management unit sends a vehicle speed signal to the HCU management unit; the vehicle speed signal is used by the HCU management unit to acquire the vehicle speed;

[0028] The second acquisition module is configured to:

[0029] In the case that the second reference information comprises the power system state, the HCU management unit acquires the power system state;

[0030] In the case that the second reference information comprises the engine water temperature, the EMS management unit sends an engine water temperature signal to the HCU management unit; the water temperature signal is used by the HCU management unit to acquire the engine water temperature;

[0031] In the case that the second reference information comprises the oil level, the ICM management unit sends an oil level signal to the HCU management unit; the oil level signal is used by the HCU management unit to acquire the oil level.

[0032] In some embodiments, the first control module is configured to, in the case that the first reference information meets a first set condition, send an activation signal to the EMS management unit by the HCU management unit;

[0033] The first control module is configured to control the engine to enter the self-starting mode by the EMS management unit upon receiving the activation signal.

[0034] The second control module is configured to send a hibernation signal to the EMS management unit by the HCU management unit upon the second reference information satisfying a second set condition.

[0035] The second control module is configured to control the engine to exit the self-starting mode by the EMS management unit upon receiving the hibernation signal.

[0036] In some embodiments, the first control module is configured to control the engine to enter the self-starting mode by the HCU management unit and send a reminder signal to the ICM management unit upon the first reference information satisfying a first set condition.

[0037] The ICM management unit is configured to display a reminder information upon receiving the reminder signal.

[0038] In some embodiments, the first control module is configured to control the vehicle to enter an HEV mode and control the engine to enter the self-starting mode upon the first reference information satisfying a first set condition, when the vehicle is in an EV mode.

[0039] The device further comprises a third acquisition module configured to acquire a state of charge (SOC) of a battery after the engine exits the self-starting mode.

[0040] The device further comprises a third control module configured to control the vehicle to switch to the EV mode upon the SOC satisfying a set condition.

[0041] According to another aspect of the present application, a computer device is provided, which comprises a processor and a memory, and the memory stores at least one computer instruction, which is loaded and executed by the processor to implement the engine control method according to the above aspect.

[0042] According to another aspect of the present application, a computer readable storage medium is provided, which stores at least one computer instruction, which is loaded and executed by a processor to implement the engine control method according to the above aspect.

[0043] According to another aspect of the present application, a computer program product is provided, which comprises computer instructions stored in a computer readable storage medium, and a processor reads and executes the computer instructions from the computer readable storage medium to implement the engine control method as described above.

[0044] The technical scheme provided by the embodiments of the present application can have the following beneficial effects:

[0045] For a vehicle with a long-term non-starting engine, the engine can be controlled to enter a self-starting mode and be started by ignition during vehicle driving and when the engine self-starting condition (i.e., the first reference information meets the first set condition) is met. Correspondingly, the engine can be turned off when the engine maintenance function is maintained and when the self-starting mode is exited (i.e., the second reference information meets the second set condition). The above scheme can start the engine when the engine is not working for a long time, maintain the engine running function to prolong the service life of the engine, and exit the self-starting mode when the engine maintenance effect is achieved or the engine running condition is not met, thereby saving the fuel of the engine while ensuring the engine maintenance efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0047] Figure 1 is a schematic diagram of a power system of a BEV provided by an exemplary embodiment of the present application;

[0048] Figure 2 is a schematic diagram of a power system of a HEV provided by an exemplary embodiment of the present application;

[0049] Figure 3 is a schematic diagram of a power system of a PHEV provided by an exemplary embodiment of the present application;

[0050] Figure 4 is a schematic diagram of an implementation environment of an engine control method provided by an exemplary embodiment of the present application;

[0051] Figure 5 is a schematic diagram of a control system provided by an exemplary embodiment of the present application;

[0052] Figure 6 is a flowchart of an engine control method provided by an exemplary embodiment of the present application;

[0053] Figure 7 FIG. 1 is a flowchart of a method for engine self-starting maintenance of a hybrid vehicle according to an example embodiment of the present disclosure;

[0054] Figure 8 FIG. 2 is a block diagram of an engine control device according to an example embodiment of the present disclosure;

[0055] Figure 9 FIG. 3 is a structural block diagram of a control system according to an example embodiment of the present disclosure.

[0056] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, further serve to explain the principles of the present disclosure. DETAILED DESCRIPTION

[0057] The objects, technical solutions and advantages of the present disclosure will become more apparent after a reading of the following detailed description together with the attached drawings.

[0058] The example embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings in which like reference numerals refer to like elements in the several figures. The following description of example embodiments is not representative of all embodiments consistent with the present disclosure. Rather, it is merely an example of apparatus and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0059] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0060] In the embodiments of the present disclosure, the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present disclosure are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions. For example, the attack operation and other object behaviors involved in the present disclosure are obtained under full authorization.

[0061] It should be understood that, although the terms first, second, etc. can be employed in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to differentiate one piece of information from another. For example, a first parameter can also be termed a second parameter, and, similarly, a second parameter can also be termed a first parameter, without departing from the scope of the present disclosure. Depending on the context, the word "if' as used herein can be interpreted to mean "when" or "in response to determining".

[0062] Some terms used in this application are explained as follows:

[0063] 1) Battery Electric Vehicle (BEV): also known as pure electric vehicle, which means that only battery provides energy supply and only electric motor provides power to drive the vehicle forward; this type of vehicle can achieve zero emission during driving. Pure electric vehicle can be equipped with a larger capacity battery and provide both AC slow charging and DC fast charging interfaces. Since this type of vehicle can only rely on the battery to provide energy, based on the current battery performance and charging infrastructure, pure electric vehicle will bring users greater range anxiety.

[0064] Please refer to Figure 1 , which shows a schematic diagram of a power system of a BEV provided by an exemplary embodiment of the present application. As shown in Figure 1 , the power system of a pure electric vehicle is composed of a power battery 11, an electric motor 12 and a controller. The power battery 11 stores electrical energy, the electric motor 12 converts electrical energy into mechanical energy to drive the wheels 13, and the controller adjusts the output of the electric motor 12 according to the user's operation. The power battery 11 is the only energy storage device of the BEV, which can be charged through external charging facilities such as household socket, public charging station, etc.

[0065] 2) Hybrid Electric Vehicle (HEV): provided with energy supply by fuel and battery, and both engine and electric motor can provide power. The battery capacity of a hybrid electric vehicle is relatively small, and no charging interface is provided. The battery can be charged through energy recovery during operation. The electric motor of this type of vehicle has small power, which can assist the engine to provide power in the scenes such as starting and accelerating. The electric motor has the advantage of large torque, which can improve the overall efficiency in the process of starting and accelerating and reduce the overall fuel consumption of the vehicle. Since it can rely on fuel to provide energy, the hybrid electric vehicle does not have the range anxiety of the pure electric vehicle. HEV can improve fuel efficiency and reduce emissions by optimizing the cooperative work of engine and electric motor.

[0066] Please refer to Figure 2 , which shows a schematic diagram of a power system of a HEV provided by an exemplary embodiment of the present application. As shown inFigure 2 As shown, the power system of a hybrid electric vehicle consists of an engine 21 (i.e., an internal combustion engine), an electric motor 22, a power battery 23, an energy recovery unit, and a power control unit. The engine 21 is one of the main power sources, responsible for driving the wheels 25 or, under certain conditions, charging the power battery 23. The engine 21 provides power to the wheels 25 by burning fuel (such as gasoline or diesel) in the fuel tank 24. The engine 21 can operate within its efficient operating range, reducing the energy consumption of the HEV. The electric motor 22 can assist the engine 21 in driving the wheels 25, providing additional power (especially during acceleration or hill climbing), or it can independently drive the wheels 25 at low speeds or under light loads, achieving zero-emission driving. The power battery 23 stores electrical energy for use by the electric motor 22. The battery pack of the power battery 23 is typically small and relies on the energy recovery unit for charging, rather than being designed for external plug-in charging. The energy recovery unit: During vehicle braking or coasting, the electric motor 22 reverses its direction to act as a generator 26, converting the vehicle's kinetic energy into electrical energy, which is then stored in the power battery 23. This process is also known as regenerative braking. Power control unit: Through complex algorithms and sensors, it monitors the vehicle status in real time (such as vehicle speed, load, battery charge, etc.) and automatically adjusts the power distribution between engine 21 and electric motor 22 to ensure the efficient operation of the power system.

[0067] 3) Plug-in Hybrid Electric Vehicle (PHEV): This is a new energy vehicle that falls between pure electric vehicles and gasoline vehicles. It has the engine, transmission, drive system, fuel line, and fuel tank of a traditional car, as well as the battery, electric motor, and control circuit of a pure electric vehicle. Moreover, the battery capacity is relatively large and there is a charging interface. PHEV combines the advantages of pure electric vehicles and hybrid vehicles, which can achieve pure electric, zero-emission driving, and can also increase the vehicle's driving range through hybrid mode.

[0068] Please refer to Figure 3 This illustrates a schematic diagram of the powertrain system of a PHEV provided in an exemplary embodiment of this application. Figure 3 As shown, a plug-in hybrid electric vehicle (PHEV) is equipped with two power systems. One power system includes a conventional engine 31, which powers the wheels 33 by burning fuel (such as gasoline or diesel) from the fuel tank 32. The other power system is an electric drive system, including a battery 34 and an electric motor 35. Unlike HEVs, PHEVs have a larger battery capacity in their battery 34, which can be charged by an external power source (such as a household outlet or charging station), rather than relying solely on energy recovery during vehicle operation. By prioritizing the use of electricity under appropriate conditions, PHEVs reduce their dependence on fuel, lower emissions, and are also more economical due to the relatively low cost of electricity.

[0069] PHEV includes two driving modes of Electric Vehicle (EV) and HEV. When the power battery 34 has sufficient power, the PHEV can drive in EV mode relying on the electric motor 35 completely, realizing zero-emission pure electric driving, which can generally meet the daily short-distance travel demand, and the driving range varies according to different vehicle models, and is usually about 30 to 100 kilometers. When the power battery 34 has insufficient power, the vehicle automatically switches to HEV mode, at which time the engine 31 can be started, and the engine 31 can not only provide driving force for the vehicle, but also charge the power battery 34 through the generator 36 to ensure the continuous work of the electric motor 35 and the power supplement of the power battery 34. When braking or decelerating, the PHEV can convert part of the kinetic energy of the vehicle into electrical energy through the energy recovery system and store it in the power battery 34, so as to improve the energy utilization efficiency. The PHEV is usually equipped with an advanced power management system, which can automatically or manually switch the power mode according to the road conditions, driving habits and user selection, so as to achieve the best energy efficiency ratio and driving experience.

[0070] That is, the plug-in hybrid electric vehicle provides an environmentally friendly and practical driving solution by combining the advantages of two power sources. However, when the plug-in hybrid electric vehicle has sufficient power, the engine is prone to be in a long-term non-working state. In combination with the hybrid vehicle models on the market and the problems of after-sales feedback, the probability of long-term non-working of the engine increases in urban working conditions. That is, in urban working conditions, the EV mode of the PHEV can meet the traffic demand of the user, for example, in the application scenario from home to the company, the power of the PHEV is basically maintained at medium or above. Specifically, because the vehicle power is high and the driving distance is short in urban working conditions, the engine may be in a long-term non-lubrication protection state, which may cause the following situations, such as: there is a possibility of rust in the internal matching parts, the oil pressure establishment time is lengthened, the crankcase water cannot be heated and volatilized, and the oil emulsification and deterioration are possible.

[0071] Therefore, long-term non-starting of the engine will affect the service life of the engine. Developing a scheme of engine self-starting maintenance function for hybrid vehicles can reduce the occurrence of the above problems, and at the same time, the scheme can be applied to all hybrid vehicle models simultaneously to reduce the development cycle of platform projects. In view of the service life problem of the engine of the PHEV, the engine self-starting maintenance function can be increased to protect the engine according to the scheme shown in the following embodiments of the present application.

[0072] Please refer to Figure 4 which shows a schematic diagram of an implementation environment of an engine control method provided by an example embodiment of the present application. As shown in Figure 4As shown, the implementation environment can include: a terminal device 110 and a server 120. Wherein, the terminal device 110 and the server 120 can be connected directly or indirectly through wired or wireless communication mode (communication network), and the present application does not make any limitation here.

[0073] Optionally, the terminal device 110 can be a control system of a plug-in hybrid electric vehicle, but is not limited thereto. The terminal device 110 can be installed with a client running a target application, which can be an application with information acquisition and engine control functions, such as a vehicle control unit. The present application does not limit the form of the target application. Please refer to Figure 5 which shows a schematic diagram of a control system provided by an exemplary embodiment of the present application. The computer system can be implemented as an architecture of a configuration system of an engine control method. As shown in Figure 5 As shown, the control system can include: a hybrid control unit (HCU) management unit 501, an instrument cluster module (ICM) management unit 502, a body control module (BCM) management unit 503, an infotainment host unit (IHU) management unit 504, and an engine management system (EMS) management unit 505. Wherein, the HCU management unit 501 communicates with the ICM management unit 502, the BCM management unit 503, the IHU management unit 504, and the EMS management unit 505 through a communication network (such as a CAN bus) inside the vehicle.

[0074] The HCU management unit 501 is the main controller of the plug-in hybrid vehicle, which can determine the torque distribution of the engine and motor, the closing and opening of high-voltage electricity, the starting or stopping of the engine, the enabling of accessories, and other operations according to the user's intention, the vehicle's driving state, and the operating state of each component (including the engine, transmission, motor, battery, etc.). The ICM management unit 502 controls various displays on the instrument panel, including the speedometer, tachometer, warning lights, etc., to show the real-time state information of the vehicle to the user; the ICM management unit 502 can receive data sent by the BCM management unit 503 and the EMS management unit 505, and the ICM management unit 502 displays the data on the instrument panel in an intuitive way after processing. The BCM management unit 503 manages the electronic devices of the vehicle's non-power system, such as lights, windows, locks, wipers, etc. The BCM management unit 503 communicates with electronic control units such as the HCU management unit 501 through the Controller Area Network (CAN) bus, receives input signals and sends control commands, and ensures the automation and convenience of the vehicle's functions. The IHU management unit 504 is responsible for managing the vehicle's infotainment system, including audio playback, navigation, Bluetooth connection, multimedia interface, etc.; the IHU management unit 504 is a central processing unit that integrates various entertainment and information functions and interacts with the user through a user interface. The EMS management unit 505 is an electronic control system that manages and optimizes the operation of the engine. The EMS management unit 505 achieves precise control over the engine's operation by integrating various sensors, actuators, and electronic control units (ECUs).

[0075] For example, the ECU can use various sensors installed on the engine, such as an intake manifold absolute pressure sensor, a coolant temperature sensor, a crankshaft position sensor, an oxygen sensor, etc., to collect various physical information during engine operation, such as intake volume, coolant temperature, engine speed, acceleration change, etc., and convert these physical information into electrical signals; after receiving the signals from the sensors, the ECU can accurately calculate the optimal fuel injection amount, ignition timing, idle control, Exhaust Gas Recirculation (EGR), etc. based on the current operating state and requirements of the engine; based on the calculation results of the ECU, the EMS can issue control instructions to fuel injectors, ignition coils, etc. to adjust the fuel supply amount, ignition timing, etc. to ensure that the engine can operate efficiently, economically, and with low emissions under various operating conditions; through the precise control of the EMS, the engine not only achieves higher fuel efficiency and performance, but also effectively reduces emissions to meet increasingly stringent environmental standards. In addition, the EMS also supports fault diagnosis functions, which can record fault codes and activate warning lights when system abnormalities are detected, facilitating quick problem location for maintenance personnel.

[0076] Optionally, the server 120 can be a stand-alone physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services, a cloud database, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDN), and basic cloud computing services such as big data and artificial intelligence platforms. The cloud server of the big data and artificial intelligence platform can provide artificial intelligence cloud services. The server 120 can be a background server of the target application program, used to provide background services for the client of the target application program.

[0077] For example, when the vehicle is in a driving state and the engine of the vehicle is in an off state, the terminal device 110 can obtain first reference information, and the first reference information at least includes the non-starting duration of the engine; correspondingly, the terminal device 110 can send the first reference information to the server 120, the server 120 judges whether the first reference information meets the first set condition, and sends the judgment result to the terminal device 110; in the case that the first reference information meets the first set condition, the terminal device 110 controls the engine to enter a self-starting mode; wherein the first set condition at least includes that the non-starting duration of the engine meets the duration set condition, and the self-starting mode is used to indicate the engine ignition start. In the case that the engine is in the self-starting mode, the terminal device 110 can obtain second reference information; correspondingly, the terminal device 110 can send the second reference information to the server 120, the server 120 judges whether the second reference information meets the second set condition, and sends the judgment result to the terminal device 110; in the case that the second reference information meets the second set condition, the terminal device 110 controls the engine to exit the self-starting mode.

[0078] Please refer to Figure 6 , which shows a flowchart of an engine control method provided by an exemplary embodiment of the present application. The method is executed by a control system of a vehicle, which can be Figure 4 , as shown. The vehicle is a hybrid electric vehicle, as shown in Figure 6 , the method can include steps 610, 620, 630 and 640.

[0079] Step 610: In the case that the vehicle is in a driving state and the engine of the vehicle is in an off state, obtain first reference information; the first reference information at least includes the non-starting duration of the engine.

[0080] Exemplarily, the vehicle can be a plug-in hybrid electric vehicle (PHEV), and the engine of the vehicle being in the off state can be that the PHEV is in an EV mode or that the PHEV is in an HEV mode but the engine is still in the off state. At this time, the HCU management unit of the vehicle can obtain the first reference information and send the first reference information to the server.

[0081] The first reference information can be used to indicate a current state of the vehicle, and the length of time for which the engine has not been started can indicate an interval between a last start time of the engine and a current time.

[0082] In a case where the first reference information satisfies a first set condition, the engine is controlled to enter a self-start mode, and the first set condition at least includes that the length of time for which the engine has not been started satisfies a length-of-time set condition. In the self-start mode, the engine is in a running state.

[0083] The self-start mode is a mode in which, on a premise that the first reference information satisfies the first set condition, the control system controls the engine to switch from the off state to the running state. In the self-start mode, the engine can maintain a stable running state, so that the water temperature of the engine reaches a suitable temperature (such as 80°C), thereby achieving the effect of maintaining the engine, prolonging the service life of the engine, and maintaining the good performance and safety of the vehicle.

[0084] Specifically, on one hand, since the lubrication system of the engine relies on oil circulation to reduce wear, when the engine is in the off state for a long time, the oil will sink to the bottom and cannot effectively cover the surfaces of all parts that need to be lubricated, which can exacerbate the wear when the engine is started next time. Therefore, timely control of the engine to enter the self-start mode can ensure oil circulation and maintain the oil film on the surface of the parts, thereby reducing wear.

[0085] On the other hand, since the rubber seals and gaskets inside the engine need to maintain a certain elasticity to prevent oil and water leakage, when the engine is in the off state for a long time, the rubber seals and gaskets and other parts can lose elasticity due to dry aging, and timely control of the engine to enter the self-start mode can help the parts inside the engine to maintain a good state.

[0086] In addition, since the metal parts inside the engine are exposed to air and are prone to rust, especially in a humid environment. Therefore, timely control of the engine to enter the self-start mode can use oil circulation and generated heat to resist rust.

[0087] For example, the first set condition can be a condition set in the server in advance by the user to determine whether the self-start mode can be entered. When the length of time that the engine is not started satisfies the length of time set condition, it can mean that the length of time that the engine is not started exceeds a specified length of time, such as the length of time that the engine is not started exceeds 30 days, that is, the interval between the last time the engine was started and the current time exceeds 30 days. At this time, the HCU management unit of the vehicle can send an engine start instruction to the EMS management unit, and the EMS management unit controls the engine to start after receiving the engine start instruction.

[0088] In a possible implementation, the first reference information can further include a predicted driving distance or a predicted driving time of the vehicle; and the first set condition can include that the predicted driving distance or the predicted driving time of the vehicle satisfies a set condition, such as the predicted driving distance is greater than 3 kilometers or the predicted driving time is greater than 6 minutes.

[0089] For example, when it is detected that the vehicle-mounted navigation of the vehicle is working, the control system can obtain the remaining driving distance or the remaining driving time of the vehicle to the destination. For another example, the control system can further obtain the current position of the vehicle and the positions of the high-frequency parking points associated with the current position, and the control system can estimate the possible remaining driving time or the remaining driving distance of the vehicle according to the distances between the current position and the positions of the high-frequency parking points.

[0090] Then, the control system estimates the predicted driving distance or the predicted driving time of the vehicle according to the remaining driving distance or the remaining driving time, and sends the predicted driving distance or the predicted driving time of the vehicle to the server. Correspondingly, the server determines whether the first reference information including the predicted driving distance or the predicted driving time satisfies the first set condition, and sends the determination result to the control system, or the control system determines whether the first reference information including the predicted driving distance or the predicted driving time satisfies the first set condition, and controls the engine to enter the self-start mode when the determination result is that the first reference information satisfies the first set condition.

[0091] In the embodiments of the application, the control system can estimate the driving distance or the driving time of the vehicle according to the user habit or the navigation information, and add the predicted driving distance or the predicted driving time to the first set condition. Since the working state of the engine needs to reach a set condition after the engine is self-started to achieve the purpose of maintaining or servicing the engine, the vehicle needs to travel a certain distance, and the present solution can improve the effectiveness of engine self-starting maintenance and avoid the situation that the vehicle has stopped before the engine self-starts and the effect of maintaining the engine is achieved.

[0092] Step 630: acquiring second reference information in the case that the engine is in the self-starting mode.

[0093] The second reference information can be state information of the vehicle, and can be used to indicate the current state of the vehicle. For example, the second reference information can be whether the vehicle is in a parking state, or the working state of the engine, or the remaining fuel amount of the vehicle.

[0094] Step 640: controlling the engine to exit the self-starting mode in the case that the second reference information satisfies a second set condition.

[0095] For example, the second set condition can be that the current engine has reached the effect of maintenance, or that the current state of the vehicle does not meet the operating condition of the engine. At this time, the HCU management unit of the vehicle can send an engine stop instruction to the EMS management unit, and the EMS management unit receives the engine stop instruction and controls the engine to stop working.

[0096] In summary, the scheme shown in the embodiments of the present application can control the engine to enter the self-starting mode and start in the case that the vehicle is in the process of driving and meets the self-starting condition of the engine (i.e., the first reference information satisfies the first set condition). Correspondingly, the engine is turned off in the case that the engine maintains the operating function and meets the exit condition of the self-starting mode (i.e., the second reference information satisfies the second set condition). The above scheme can start the engine in the case that the engine has not worked for a long time, maintain the operating function of the engine, and prolong the service life of the engine. In addition, the above scheme can exit the self-starting mode in the case that the engine reaches the effect of maintenance or does not meet the operating condition of the engine, thereby saving the fuel of the engine on the premise of ensuring the maintenance efficiency of the engine.

[0097] Based on the above Figure 2 In a possible implementation of the scheme in the embodiments, the first reference information further includes the power system state, the front hood state, the fuel amount, the cumulative mileage, and the vehicle speed; the first set condition further includes that the power system state meets a set state, the front hood is in a closed state, the fuel amount meets a fuel amount set condition, the cumulative mileage meets a mileage set condition, and the vehicle speed meets a vehicle speed set condition; and the second reference information includes at least one of the power system state, the water temperature of the engine, and the fuel amount; and the second set condition includes at least one of that the power system state does not meet the set state, the water temperature of the engine meets a water temperature set condition, and the fuel amount does not meet the fuel amount set condition.

[0098] The power system state can be used to indicate whether the vehicle power system is ready or not, or can also be used to indicate whether the vehicle has driving conditions. For example, the power system state can be used to indicate whether the vehicle meets the high-voltage state, and accordingly, the power system state meets the set state that the vehicle meets the high-voltage state; for another example, the power system state can be used to indicate whether the vehicle is in the driving PT-Ready state, and accordingly, the power system state meets the set state that the vehicle is in the driving PT-Ready state. The high-voltage state focuses on the activation of the high-voltage circuit and the connection of the power source, and the driving PT-Ready state emphasizes that the entire power system has completed all preparation steps and has driving conditions. These two states are the key to whether the electric vehicle has driving conditions.

[0099] Specifically, the high-voltage state refers to a state in which the power battery system of the vehicle has been activated, the high-voltage circuit has been connected, and the battery pack has started to supply power to the high-voltage components such as the motor, air conditioning compressor (for example, electric), DC / DC converter, etc. of the vehicle. Before the high-voltage state, the vehicle can perform a series of safety checks, including but not limited to battery management system (BMS) self-check, high-voltage line insulation detection, etc., to ensure that all high-voltage systems are in a safe working state. Once confirmed, the vehicle controller will instruct the high-voltage contactor to close, thereby connecting the high-voltage power of the power battery to the power system, and the vehicle enters a standby or running state.

[0100] Specifically, "PT-Ready" in the driving PT-Ready state refers to the power system being ready (Powertrain Ready). In an electric vehicle or PHEV, the driving PT-Ready state means that the vehicle's power system has completed all self-check processes and confirmed that each subsystem (such as the electric motor, transmission, battery management system, etc.) is working normally, and the vehicle is ready for driving operation. After reaching this state, the user (such as the driver) can shift gears and press the accelerator pedal, and the vehicle will respond and start driving. The driving PT-Ready state is an important intermediate step from a stationary vehicle to a safe driving vehicle, which can ensure that all systems related to driving have completed the necessary initialization and self-check to work safely and efficiently.

[0101] The front hood state described above can be used to indicate whether the front hood is in a closed state. A front hood that is not properly closed can suddenly pop up during driving, obstructing the view or causing an accident, therefore, it is crucial to ensure that the front hood is in a good closed state for driving safety. For example, when it is detected that the front hood is not in a closed state, the control system of the vehicle can send a prompt to the user; for example, the control system of the vehicle can broadcast the front hood state to the user through the IHU management unit, or display the front hood state to remind the user to properly close the front hood.

[0102] The oil amount described above can be used to indicate whether the fuel of the engine can meet the amount of fuel required for the engine to achieve maintenance effect; accordingly, the oil amount setting condition can be pre-set by the user. For example, the oil amount described above satisfying the oil amount setting condition can be that the oil amount is greater than the oil amount specified threshold, and the oil amount specified threshold can be 10% of the maximum oil amount; the oil amount described above not satisfying the oil amount setting condition can be that the oil amount is less than or equal to the oil amount specified threshold. When the oil amount is relatively large (e.g., greater than the oil amount specified threshold), it can represent that the fuel of the engine can meet the amount of fuel required for the engine to achieve maintenance effect, at which time the engine can be self-started; when the oil amount is relatively small (e.g., less than the oil amount specified threshold), it can represent that the fuel of the engine cannot meet the amount of fuel required for the engine to achieve maintenance effect, at which time the engine does not have the self-starting condition.

[0103] The cumulative mileage of the vehicle described above, also known as the total mileage or absolute mileage, can be used to indicate the total distance traveled by the vehicle since it was manufactured, which is usually not resettable and records the service life and driving history of the vehicle. Accordingly, the mileage setting condition can be pre-set by the user. For example, the cumulative mileage described above satisfying the mileage setting condition can be that the total mileage of the vehicle is not less than the mileage specified threshold, and the mileage specified threshold can be 500 km. When the total mileage of the vehicle is relatively small (e.g., less than the mileage specified threshold), it can represent that the vehicle has been manufactured for a relatively short time, at which time the engine does not need to be self-started for maintenance.

[0104] The vehicle speed described above can be used to indicate the current driving speed of the vehicle, and accordingly, the vehicle speed setting condition can be pre-set by the user. For example, the vehicle speed described above satisfying the vehicle speed setting condition can be that the vehicle speed is greater than the vehicle speed specified threshold, and the vehicle speed specified threshold can be 10 km / h. When the vehicle speed is relatively low (e.g., less than the vehicle speed specified threshold), it can represent that the vehicle is in a low-speed driving state, which usually occurs in a scenario where the vehicle is about to stop (e.g., the vehicle is looking for a parking space), at which time the engine does not have the self-starting maintenance condition.

[0105] The water temperature of the engine can be used to indicate the temperature of the coolant in the engine cooling system, and the water temperature setting condition can be preset by the user. For example, the water temperature of the engine satisfying the water temperature setting condition can be that the water temperature of the engine is greater than a temperature specified threshold, and the temperature specified threshold can be 80°C. Specifically, when the water temperature of the engine reaches the suitable working temperature (for example, the water temperature is greater than the temperature specified threshold), it can represent that the working temperature of the coolant in the engine cooling system is within the normal working temperature range (for example, 80-90°C). At this time, the engine can improve the effects of fuel efficiency and lubricating oil performance. On the one hand, when the water temperature of the engine reaches the suitable working temperature, the expansion of the internal parts of the engine reaches the best state, and the clearance of the piston, valve and other components is moderate, which helps to reduce the friction loss and thus improve the fuel economy. On the other hand, the viscosity of the fuel of the engine decreases at high temperature, and the flowability is better, which can more effectively lubricate the internal parts of the engine and reduce wear. Therefore, when the water temperature of the engine is greater than the temperature specified threshold, it indicates that the maintenance effect of the engine has been reached, and at this time, the engine can be controlled to exit the self-starting mode.

[0106] In the embodiments of the present application, the first setting condition needs to be met at the same time, and the control system can control the engine to enter the self-starting mode; correspondingly, when any one of the second setting conditions is met, the control system should control the engine to exit the self-starting mode.

[0107] Based on the above embodiments, the present embodiment shows that the first reference information, the first setting condition, the second reference information and the second setting condition can include specific contents, which provide further limiting conditions for the engine to enter or exit the self-starting mode, specifically including not controlling the engine to start when the state of the vehicle is difficult to meet the effective maintenance of the engine; controlling the engine to exit the self-starting mode when the maintenance effect of the engine is reached; the present embodiment can improve the maintenance efficiency of the engine under the premise of ensuring driving safety.

[0108] Based on the schemes in the above various embodiments, in a possible implementation, the control system includes a vehicle control unit HCU management unit, and an instrument control unit ICM management unit, a body control unit BCM management unit, an audio host control unit IHU management unit, and an engine control unit EMS management unit connected with the HCU management unit.

[0109] The above step 620 can be implemented as:

[0110] In the case that the first reference information includes the length of time when the engine is not started, the IHU management unit sends a date signal to the HCU management unit; the date signal is used by the HCU management unit to calculate the length of time when the engine is not started; in the case that the first reference information includes the power system state, the HCU management unit acquires the power system state; in the case that the first reference information includes the hood state, the BCM management unit sends a hood state signal to the HCU management unit; the hood state signal is used by the HCU management unit to acquire the hood state; in the case that the first reference information includes the oil level, the ICM management unit sends an oil level signal to the HCU management unit; the oil level signal is used by the HCU management unit to acquire the oil level; in the case that the first reference information includes the cumulative mileage, the ICM management unit sends a mileage signal to the HCU management unit; the mileage signal is used by the HCU management unit to acquire the cumulative mileage; in the case that the first reference information includes the vehicle speed, the ICM management unit sends a vehicle speed signal to the HCU management unit; the vehicle speed signal is used by the HCU management unit to acquire the vehicle speed.

[0111] The above step 640 can be implemented as:

[0112] In the case that the second reference information includes the power system state, the HCU management unit acquires the power system state; in the case that the second reference information includes the engine water temperature, the EMS management unit sends an engine water temperature signal to the HCU management unit; the engine water temperature signal is used by the HCU management unit to acquire the engine water temperature; in the case that the second reference information includes the oil level, the ICM management unit sends an oil level signal to the HCU management unit; the oil level signal is used by the HCU management unit to acquire the oil level.

[0113] The architecture of the control system is described above Figure 5 The corresponding description is not repeated here.

[0114] In the embodiments of the present application, the control system can integrate and manage data from different management units through the HCU management unit to achieve comprehensive monitoring and control of the vehicle. The control system can collect and display the instant information of the vehicle through the ICM management unit, including the oil level, the cumulative mileage, the vehicle speed, etc. These information can be provided by the sensors of the vehicle to the ICM management unit, for example, the vehicle speed can be measured by the wheel speed sensor of the vehicle; then, the ICM management unit can send these information to the HCU management unit.

[0115] The control system can manage the vehicle body electrical system of the vehicle through the BCM management unit, including the lights, the windows, the door locks, and the hood. The BCM management unit can transmit the hood state to the HCU management unit through the CAN bus to ensure the safety of the vehicle or perform corresponding function control.

[0116] The control system can implement the operation and management of the engine through the EMS management unit, including fuel injection, ignition timing, and monitoring the operating state of the engine (such as water temperature). The sensor of the EMS management unit can monitor the temperature of the engine coolant and send the temperature data to the HCU management unit, so that the HCU management unit adjusts the working mode of the hybrid power system when necessary, prevents the engine from overheating, and ensures that the engine operates in the optimal efficiency range.

[0117] The above-mentioned IHM management unit can collect date signals. For example, the IHM management unit stores the date (such as the specific date of the year, month, and day) when the engine is started and the key is turned off, and sends the date to the HCU management unit, so that the HCU management unit calculates the interval between the current time and the above-mentioned date, and then obtains the length of time when the engine is not started.

[0118] Based on the above-mentioned embodiments, this embodiment shows how each control unit of the control system obtains the above-mentioned first reference information and the above-mentioned second reference information, which can specifically include: the above-mentioned power system state can be obtained by the HCU management unit; the above-mentioned oil amount, mileage, and vehicle speed can be collected by the ICM management unit and sent to the HCU management unit; the above-mentioned front hood state can be collected by the BCM management unit and sent to the HCU management unit; the above-mentioned water temperature can be collected by the EMS management unit and sent to the HCU management unit; this embodiment can coordinate each management unit in the control system, and the HCU management unit as the core control unit can integrate and process data from different management units such as ICM, BCM, and EMS, improve the accuracy and timeliness of the above-mentioned first reference information and the above-mentioned second reference information, and then improve the efficiency of controlling the engine to enter and exit the self-starting mode.

[0119] Based on the schemes shown in the above-mentioned embodiments of the present application, in one possible implementation, the above-mentioned step 620 can be implemented as: in the case that the first reference information meets the first set condition, sending an activation signal to the EMS management unit through the HCU management unit; in the case that the activation signal is received, controlling the engine to enter the self-starting mode through the EMS management unit.

[0120] The above-mentioned step 630 can be implemented as: in the case that the second reference information meets the second set condition, sending a hibernation signal to the EMS management unit through the HCU management unit; in the case that the hibernation signal is received, controlling the engine to exit the self-starting mode through the EMS management unit.

[0121] In the embodiments of the present application, the activation signal can be used to indicate whether the engine meets the self-starting condition; for example, the activation signal can be an engine permission starting instruction. When the first reference information meets the first set condition, the HCU management unit sends the engine permission starting instruction to the EMS management unit; accordingly, after the EMS management unit receives the engine permission starting instruction, the control process of engine starting is started. The control process includes, but is not limited to, fuel injection control, ignition timing setting, starter motor activation, etc., to ensure that the engine can be started quickly and smoothly.

[0122] The sleep signal can be used to indicate whether the engine meets the condition for exiting the self-starting mode; for example, the sleep signal can be an engine permission stopping instruction. When the second reference information meets the second set condition, the HCU management unit sends the engine permission stopping instruction to the EMS management unit; accordingly, after the EMS management unit receives the engine permission stopping instruction, the control process of engine stopping is started. The control process includes, but is not limited to, adjusting fuel supply, ignition system, to ensure that the engine can be stopped smoothly and without damage.

[0123] Based on the above embodiments, the entering or exiting of the self-starting mode of the engine can be indirectly controlled by sending corresponding instruction signals to the EMS management unit to control the entering or exiting of the self-starting mode by the EMS management unit; the control logic of the engine is processed in layers in this embodiment, the HCU management unit is the decision layer, and the EMS management unit is the execution layer, which is convenient for future technical upgrading and system maintenance; for example, when the self-starting strategy needs to be adjusted or a new control algorithm is introduced, the adjustment can be made only in the decision layer without disturbing the execution layer; thereby the working efficiency and response speed of the HCU management unit and the EMS management unit can be improved to ensure efficient starting of the engine.

[0124] Based on the schemes shown in the above embodiments, in one possible implementation, the step 620 can be implemented as: in the case that the first reference information meets the first set condition, the HCU management unit controls the engine to enter the self-starting mode and sends a reminder signal to the ICM management unit; in the case that the reminder signal is received, the ICM management unit displays reminder information.

[0125] The reminder signal can be used to indicate that the engine has entered the self-starting mode, and the reminder information is used to indicate to the user that the engine of the vehicle has been self-started or is about to be self-started.

[0126] For example, after the ICM management unit receives the reminder signal from the HCU management unit, the dashboard can display preset text information or icon information within a limited time. The preset text information can be "engine enters automatic maintenance mode" or "engine will start in x seconds" to inform the user that the engine is in the starting process or has started. The preset text information can disappear automatically after 5 seconds of display.

[0127] In a possible implementation, the engine control method further includes: in response to the engine exiting the self-starting mode, the ICM management unit displays fuel consumption information.

[0128] The fuel consumption information can be used to indicate the amount of fuel consumed by the engine in the self-starting mode. For example, when the engine enters the self-starting mode, the ICM management unit can send a first oil amount signal to the HCU management unit, and the HCU management unit obtains a first oil amount according to the first oil amount signal. After the engine exits the self-starting mode, the ICM management unit can send a second oil amount signal to the HCU management unit, and the HCU management unit obtains a second oil amount according to the second oil amount signal. The HCU management unit calculates the amount of fuel consumed by the engine in the self-starting mode (i.e., the fuel consumption information) according to the difference between the first oil amount and the second oil amount. Accordingly, the HCU management unit sends a fuel consumption signal to the ICM management unit, and the ICM management unit displays the fuel consumption information upon receiving the fuel consumption signal.

[0129] Based on the above embodiments, the HCU management unit can send a reminder signal to the ICM management unit when controlling the engine to enter the self-starting mode, and the ICM management unit can display reminder information that the engine has entered the self-starting mode according to the reminder signal. This embodiment enables the user to learn about the vehicle status in a timely manner, improves information transparency and safety during vehicle use, and enhances the human-machine interaction experience.

[0130] Based on the schemes shown in the above embodiments, in a possible implementation, when the vehicle is in the EV mode, the step 620 can be implemented as follows: when the first reference information meets the first set condition, the vehicle is controlled to enter the HEV mode, and the engine is controlled to enter the self-starting mode; the engine control method further includes: in response to the engine exiting the self-starting mode, obtaining a state of charge (SOC) of the battery; and in response to the SOC meeting a set condition, controlling the vehicle to switch to the EV mode.

[0131] In the embodiments of the present application, when the vehicle is running in the EV mode, the vehicle mainly relies on the electric motor powered by the power battery to drive, and does not directly use the engine, which is suitable for short-distance low-speed driving or sufficient power supply conditions to achieve zero emission and high efficiency. In the case where the first reference information meets the first set condition, the control system will control the engine to start, and since the current vehicle is in the EV mode, it is also necessary to control the vehicle to switch from the EV mode to the HEV mode.

[0132] After the engine exits the self-starting mode when the second reference information meets the second set condition, the control system can monitor the battery state of charge SOC, which is a key factor for determining whether the vehicle returns to the EV mode from the HEV mode. The SOC meets the set condition, which can be that the SOC is higher than a preset threshold. At this time, the HCU management unit can control the vehicle to switch back to the EV mode.

[0133] Based on the above embodiments, when the first reference information of the vehicle meets the first set condition and the vehicle is in the EV mode, the control system can switch the vehicle to the HEV mode and control the engine to start. After the engine stops running, whether the vehicle can be switched to the EV mode is determined according to the battery state of charge. The embodiments can switch the vehicle back to the EV mode when the battery state of charge meets the condition, maximize the use of electric energy, and ensure the effective maintenance of the engine to drive purely, thereby saving fuel and reducing emissions and improving the overall energy utilization efficiency of the vehicle.

[0134] For example, based on any one or more of the above embodiments, the embodiments of the present application provide a hybrid vehicle engine self-starting maintenance method. The method can increase the engine self-starting maintenance function to protect the engine when the engine of the plug-in hybrid vehicle is not working for a long time. Through the interaction of each management unit in the control system, the control system starts the engine and maintains the engine running function.

[0135] Please refer to Figure 7 which shows a flowchart of a hybrid vehicle engine self-starting maintenance method provided by an exemplary embodiment of the present application. As shown in Figure 7As shown, first, when the plug-in hybrid vehicle is in running state, the IHU management unit 702 sends a date signal (such as a year-month-day cycle signal) to the HCU management unit 701, the BCM management unit 703 sends a front hood state signal to the HCU management unit 701, and the ICM management unit 704 sends an oil level signal, a mileage signal, and a vehicle speed signal to the HCU management unit 701. Correspondingly, the HCU management unit 701 obtains whether the vehicle mode is in the PT-Ready state, receives the date signal sent by the IHU management unit 702, the front hood state signal sent by the BCM management unit 703, and the oil level signal, the mileage signal, and the vehicle speed signal sent by the ICM management unit 704.

[0136] Secondly, the HCU management unit 701 can make its own logical judgment. When the vehicle mode is in the PT-Ready state and the first condition is met at the same time, the HCU management unit 701 sends an engine self-maintenance start activation signal to the EMS management unit 705 and an engine self-maintenance start reminder signal to the ICM management unit 704. The first condition includes the following contents: 1) the interval time of engine start exceeds a threshold value, such as 30 days; 2) the engine hood is not opened; 3) the oil level is greater than the allowable threshold value, such as 10%; 4) the total mileage of the vehicle is not less than a threshold value, such as 500 km; 5) the vehicle speed is greater than a threshold value, such as 10 km / h. After the ICM management unit 704 receives the engine self-maintenance start reminder signal, a text reminder such as "engine enters automatic maintenance mode" is displayed after processing by the instrument module, and the text reminder disappears after being displayed for 5 s. After the EMS management unit 705 receives the engine self-maintenance start activation signal, the engine is controlled to start.

[0137] Then, after the engine is started, the EMS management unit 705 sends a water temperature signal to the HCU management unit 701, and the ICM management unit 704 sends an oil level signal to the HCU management unit 701. Correspondingly, the HCU management unit 701 obtains whether the vehicle mode is in the PT-Ready state, receives the water temperature signal sent by the EMS management unit 705 and the oil level signal sent by the ICM management unit 704.

[0138] Finally, the HCU management unit 701 can make its own logical judgment. When any one of the second conditions is met, the HCU management unit 701 sends an engine self-maintenance start deactivation signal to the EMS management unit 705 to exit the engine self-start mode. The second conditions include: 1) the vehicle mode is in a non-PT-Ready state; 2) the engine water temperature is greater than a threshold value, such as 80℃; 3) the oil level is lower than a threshold value, such as 10%. After the EMS management unit 705 receives the engine self-maintenance start deactivation signal, the engine is controlled to stop running.

[0139] In the above process, the self-start function of the engine cannot be closed, that is, the engine self-start function cannot be in a disabled state.

[0140] In summary, the method shown in the above embodiments of the application can be applied to the engine maintenance scheme of the plug-in hybrid vehicle, and relates to the technical scheme of increasing the engine self-start maintenance function to protect the engine in the case of long-term non-operation of the engine of the plug-in hybrid vehicle. Specifically, for a vehicle with a long-term non-start engine, the engine can be controlled to be ignited and started during vehicle driving and under the condition that the engine self-start condition is met; accordingly, the engine can be turned off under the condition that the engine maintenance operation function is maintained and the self-start mode is exited. The above scheme can start the engine in the case of long-term non-operation of the engine, maintain the engine operation function, and prolong the service life of the engine, and can also exit the self-start mode when the engine maintenance effect is achieved or the engine operation condition is not met, thereby saving the fuel of the engine under the premise of ensuring the engine maintenance efficiency.

[0141] The above scheme can protect the engine hardware of the plug-in hybrid vehicle, improve the robustness of the strategy, and reduce the occurrence probability of vehicle after-sales quality problems.

[0142] Please refer to Figure 8 which shows a block diagram of an engine control device according to an example embodiment of the application, which can be used to execute all or part of the steps performed by the control system of the vehicle in the method shown in Figure 6 Figure 8 The vehicle is a hybrid electric vehicle, and the device comprises:

[0143] The first acquisition module 801 is configured to acquire first reference information in the case that the vehicle is in a driving state and the engine of the vehicle is in an off state; the first reference information at least comprises the non-start time length of the engine;

[0144] The first control module 802 is configured to control the engine to enter a self-start mode in the case that the first reference information meets a first set condition; the first set condition at least comprises that the non-start time length of the engine meets a time length set condition; in the self-start mode, the engine is in an operation state;

[0145] The second acquisition module 803 is configured to acquire second reference information in the case that the engine is in the self-start mode;

[0146] The second control module 804 is configured to control the engine to exit the self-start mode in the case that the second reference information meets a second set condition.

[0147] ​In some embodiments, the first reference information further comprises: a power system state, a front hood state, an oil amount, a cumulative mileage, and a vehicle speed;

[0148] The first set condition further comprises: the power system state satisfying a set state, the front hood being in a closed state, the oil amount satisfying an oil amount set condition, the cumulative mileage satisfying a mileage set condition, and the vehicle speed satisfying a vehicle speed set condition;

[0149] The second reference information comprises at least one of: the power system state, a water temperature of the engine, and the oil amount;

[0150] The second set condition comprises at least one of: the power system state not satisfying the set state, the water temperature of the engine satisfying a water temperature set condition, and the oil amount not satisfying the oil amount set condition.

[0151] In some embodiments, the control system comprises a whole vehicle controller HCU management unit, and an instrument controller ICM management unit, a body controller BCM management unit, an audio host controller IHU management unit, and an engine controller EMS management unit connected to the HCU management unit;

[0152] The first acquisition module is configured to:

[0153] In a case where the first reference information comprises an engine non-starting duration, the date signal is sent from the IHU management unit to the HCU management unit for the HCU management unit to calculate the engine non-starting duration;

[0154] In a case where the first reference information comprises the power system state, the power system state is acquired by the HCU management unit;

[0155] In a case where the first reference information comprises the front hood state, the front hood state signal is sent from the BCM management unit to the HCU management unit for the HCU management unit to acquire the front hood state;

[0156] In a case where the first reference information comprises the oil amount, the oil level signal is sent from the ICM management unit to the HCU management unit for the HCU management unit to acquire the oil amount;

[0157] In a case where the first reference information comprises the cumulative mileage, the mileage signal is sent from the ICM management unit to the HCU management unit for the HCU management unit to acquire the cumulative mileage;

[0158] In a case where the first reference information comprises the vehicle speed, the vehicle speed signal is sent from the ICM management unit to the HCU management unit for the HCU management unit to acquire the vehicle speed;

[0159] The second acquisition module is configured to:

[0160] In a case where the second reference information comprises a power system state, the power system state is acquired by the HCU management unit;

[0161] In a case where the second reference information comprises a water temperature of the engine, the water temperature signal of the engine is sent to the HCU management unit by the EMS management unit; the water temperature signal is used for the HCU management unit to acquire the water temperature of the engine.

[0162] In a case where the second reference information comprises an oil level, the oil level signal is sent to the HCU management unit by the ICM management unit; the oil level signal is used for the HCU management unit to acquire the oil level.

[0163] In some embodiments, the first control module is configured to, in a case where the first reference information satisfies a first set condition, send an activation signal to the EMS management unit by the HCU management unit;

[0164] The first control module is configured to, in a case where the activation signal is received, control the engine to enter the self-starting mode by the EMS management unit.

[0165] The second control module is configured to, in a case where the second reference information satisfies a second set condition, send a hibernation signal to the EMS management unit by the HCU management unit;

[0166] The second control module is configured to, in a case where the hibernation signal is received, control the engine to exit the self-starting mode by the EMS management unit.

[0167] In some embodiments, the first control module is configured to, in a case where the first reference information satisfies a first set condition, control the engine to enter the self-starting mode by the HCU management unit and send a reminder signal to the ICM management unit;

[0168] In a case where the reminder signal is received, the reminder information is displayed by the ICM management unit.

[0169] In some embodiments, in a case where the vehicle is in an EV mode, the first control module is configured to, in a case where the first reference information satisfies a first set condition, control the vehicle to enter an HEV mode and control the engine to enter the self-starting mode.

[0170] The device further comprises a third acquisition module configured to acquire a state of charge (SOC) of the battery after the engine exits the self-starting mode.

[0171] The device further comprises a third control module configured to, in a case where the SOC satisfies a set condition, control the vehicle to switch to the EV mode.

[0172] It should be noted that the apparatus provided by the above embodiments is only used as an example to illustrate the division of the above functional modules in achieving its functions, and in actual applications, the above functions can be completed by different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules to complete all or part of the above-described functions.

[0173] As to the apparatus in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method; the technical effects achieved by the operations performed by each module are the same as the technical effects in the embodiments related to the method, and will not be described in detail here.

[0174] Please refer to Figure 9 which shows a structural block diagram of a computer device 900 according to an example embodiment of the present application. The structural block diagram can also be implemented as a structural block diagram of a control system or a server in the above solutions of the present application. The computer device 900 includes a central processing unit (CPU) 901, a system memory 904 including a random access memory (RAM) 902 and a read-only memory (ROM) 903, and a system bus 905 connecting the system memory 904 and the central processing unit 901. The computer device 900 also includes a mass storage device 906 for storing an operating system 909, application programs 910, and other program modules 911.

[0175] The mass storage device 906 is connected to the central processing unit 901 through a mass storage controller (not shown) connected to the system bus 905. The mass storage device 906 and its associated computer readable medium provide non-volatile storage for the computer device 900. That is, the mass storage device 906 can include a computer readable medium (not shown) such as a hard disk or a compact disc read-only memory (CD-ROM) drive.

[0176] Without loss of generality, the computer readable medium can include computer storage media and communication media. Computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes RAM, ROM, Erasable Programmable Read Only Memory (EPROM), Electrically-Erasable Programmable Read-Only memory (EEPROM), flash memory or other solid state memory technology, CD-ROM, Digital Versatile Disc (DVD), or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices. It should be understood by those skilled in the art that computer storage media does not limit to the above-mentioned several types. The system memory 904 and the mass storage device 906 mentioned above can be collectively referred to as memory.

[0177] According to various embodiments of the present disclosure, the computer device 900 can also run on a remote computer connected to the network through a network such as the Internet. That is, the computer device 900 can be connected to the network 908 through the network interface unit 907 connected to the system bus 905, or can be connected to other types of networks or remote computer systems (not shown) using the network interface unit 907.

[0178] The memory further includes at least one computer instruction stored in the memory, and the central processing unit 901 implements all or part of the steps in the method shown in the above various embodiments by executing the at least one computer instruction.

[0179] In an exemplary embodiment, a chip is also provided, which includes programmable logic circuit and program instructions, when the chip runs on a control system, for implementing the engine control method of the above aspects.

[0180] In an exemplary embodiment, a computer program product is also provided, which includes computer instructions stored in a computer readable storage medium. The processor of the control system reads the computer instructions from the computer readable storage medium, and the processor reads and executes the computer instructions from the computer readable storage medium to implement the engine control method provided by the above method embodiments.

[0181] In the example embodiment, a computer readable storage medium is also provided, and the computer readable storage medium stores computer instructions loaded and executed by a processor to implement the engine control method provided by each of the above method embodiments.

[0182] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or by program instructing relevant hardware, and the program can be stored in a computer readable storage medium, and the storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0183] Those skilled in the art should realize that, in one or more examples described above, the functions described in the embodiments of the present application can be implemented by hardware, software, firmware or any combination thereof. When implemented by software, the functions can be stored in a computer readable medium or transmitted as one or more instructions or codes on a computer readable medium. The computer readable medium includes a computer storage medium and a communication medium, and the communication medium includes any medium facilitating the transmission of computer programs from one place to another. The storage medium can be any available medium accessible by a general or special purpose computer.

[0184] The above description is only optional embodiments of the present application, and does not limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An engine control method characterized by, The method is executed by a control system of a vehicle, the vehicle is a hybrid electric vehicle, and the method comprises: acquiring first reference information when the vehicle is in a running state and an engine of the vehicle is in an off state; the first reference information at least comprises an unstart duration of the engine, a predicted running distance or a predicted running duration of the vehicle, a power system state, a front hood state, an oil amount, a cumulative mileage, and a vehicle speed; controlling the engine to enter a self-start mode when the first reference information satisfies a first set condition; the first set condition at least comprises that the unstart duration of the engine satisfies a duration set condition, the predicted running distance or the predicted running duration of the vehicle satisfies a set condition, the power system state satisfies a set state, the front hood is in a closed state, the oil amount satisfies an oil amount set condition, the cumulative mileage satisfies a mileage set condition, and the vehicle speed satisfies a vehicle speed set condition; in the self-start mode, the engine is in a running state; acquiring second reference information when the engine is in the self-start mode; the second reference information at least comprises the power system state, a water temperature of the engine, and the oil amount; controlling the engine to exit the self-start mode when the second reference information satisfies a second set condition; the second set condition at least comprises that the power system state does not satisfy the set state, the water temperature of the engine satisfies a water temperature set condition, and the oil amount does not satisfy the oil amount set condition.

2. The method of claim 1, wherein, The control system comprises a whole vehicle controller HCU management unit, an instrument controller ICM management unit, a body controller BCM management unit, an audio host controller IHU management unit, and an engine controller EMS management unit connected with the HCU management unit; The first reference information is acquired by: sending a date signal to the HCU management unit through the IHU management unit when the first reference information comprises the unstart duration of the engine; the date signal is used for the HCU management unit to calculate the unstart duration of the engine; acquiring the power system state through the HCU management unit when the first reference information comprises the power system state; sending a front hood state signal to the HCU management unit through the BCM management unit when the first reference information comprises the front hood state; the front hood state signal is used for the HCU management unit to acquire the front hood state; sending an oil level signal to the HCU management unit through the ICM management unit when the first reference information comprises the oil amount; the oil level signal is used for the HCU management unit to acquire the oil amount; sending a mileage signal to the HCU management unit through the ICM management unit when the first reference information comprises the cumulative mileage; the mileage signal is used for the HCU management unit to acquire the cumulative mileage; In a case where the first reference information comprises the vehicle speed, sending, by the ICM management unit, a vehicle speed signal to the HCU management unit; the vehicle speed signal is used by the HCU management unit to obtain the vehicle speed; The second reference information comprises: In a case where the second reference information comprises the power system state, obtaining, by the HCU management unit, the power system state; In a case where the second reference information comprises the engine water temperature, sending, by the EMS management unit, an engine water temperature signal to the HCU management unit; the engine water temperature signal is used by the HCU management unit to obtain the engine water temperature; In a case where the second reference information comprises the oil level, sending, by the ICM management unit, an oil level signal to the HCU management unit; the oil level signal is used by the HCU management unit to obtain the oil level.

3. The method of claim 2, wherein, The method further comprises: In a case where the first reference information satisfies the first set condition, sending, by the HCU management unit, an activation signal to the EMS management unit; In a case where the activation signal is received, controlling, by the EMS management unit, the engine to enter the self-starting mode; The method further comprises: In a case where the second reference information satisfies the second set condition, sending, by the HCU management unit, a hibernation signal to the EMS management unit; In a case where the hibernation signal is received, controlling, by the EMS management unit, the engine to exit the self-starting mode.

4. The method of claim 2, wherein, The method further comprises: In a case where the first reference information satisfies the first set condition, controlling, by the HCU management unit, the engine to enter the self-starting mode, and sending a reminder signal to the ICM management unit; In a case where the reminder signal is received, displaying, by the ICM management unit, a reminder information.

5. The method of claim 1, wherein, The method further comprises: In a case where the vehicle is in an electric vehicle (EV) mode, the method further comprises: In a case where the first reference information satisfies the first set condition, controlling the vehicle to enter a hybrid electric vehicle (HEV) mode, and controlling the engine to enter the self-starting mode; The method further comprises: After the engine exits the self-starting mode, obtaining a state of charge (SOC) of a battery; 6. An engine control device characterized by comprising: In a case where the SOC satisfies a set condition, controlling the vehicle to switch to the EV mode. The apparatus comprises: The first acquisition module is configured to acquire first reference information when the vehicle is in a driving state and an engine of the vehicle is in an off state; the first reference information comprises at least a non-starting duration of the engine, a predicted driving distance or a predicted driving duration of the vehicle, a power system state, a front hood state, an oil amount, a cumulative mileage and a vehicle speed; and the vehicle is a hybrid electric vehicle. The first control module is configured to control the engine to enter a self-starting mode when the first reference information satisfies first set conditions; the first set conditions comprise at least that the non-starting duration of the engine satisfies a duration set condition, the predicted driving distance or the predicted driving duration of the vehicle satisfies a set condition, the power system state satisfies a set state, the front hood is in a closed state, the oil amount satisfies an oil amount set condition, the cumulative mileage satisfies a mileage set condition and the vehicle speed satisfies a vehicle speed set condition; and in the self-starting mode, the engine is in a running state. The second acquisition module is configured to acquire second reference information when the engine is in the self-starting mode; the second reference information comprises at least one of the following: the power system state, a water temperature of the engine and the oil amount. The second control module is configured to control the engine to exit the self-starting mode when the second reference information satisfies second set conditions; the second set conditions comprise at least one of the following: the power system state does not satisfy the set state, the water temperature of the engine satisfies a water temperature set condition and the oil amount does not satisfy the oil amount set condition.

7. A computer device, comprising: The computer device comprises a processor and a memory; the memory stores at least one computer instruction; the at least one computer instruction is loaded and executed by the processor to implement the engine control method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores at least one computer instruction; the computer instruction is loaded and executed by the processor to implement the engine control method according to any one of claims 1 to 5.

9. A computer program product, characterised in that, The computer program product comprises computer instructions stored in a computer readable storage medium; the computer instructions are read and executed by the processor of the computer device to implement the engine control method according to any one of claims 1 to 5.

Images