Vehicle control method and vehicle

Abstract

Disclosed in the embodiments of the present disclosure are a vehicle control method and a vehicle. The control method comprises: in response to a water pump failure on a cooling loop of an engine, acquiring the remaining capacity of a battery; controlling a target power of the engine on the basis of the remaining capacity of the battery; and calculating a vehicle endurance mileage on the basis of the target power of the engine, a first duration and the remaining capacity of the battery, wherein the first duration is the maximum duration for which the engine operates at the target power under a water pump failure condition.

Description

Vehicle control method and vehicle Technical Field

[0001] The embodiments of the present disclosure relate to the field of automobile technology, and more particularly, to a vehicle control method and a vehicle. Background Art

[0002] With the continuous development of automobile technology, vehicle intelligence and electrification are the mainstream trends in engine technology upgrades. With the deepening of hybridization, the engine cooling system has evolved from a solution of engine mechanical water pump (MWP) combined with a wax thermostat to a solution of engine electric water pump (EWP) combined with an electronic thermostat.

[0003] The electronic water pump decouples coolant flow from engine speed in the engine cooling circuit, while the electronic thermostat decouples thermostat opening from water temperature. This allows for independent control of the electronic water pump from engine speed and proactive opening and closing of the thermostat. This significantly enhances the intelligent and refined control of the cooling system, facilitates precise control of engine water temperature and the temperature of the vehicle's air conditioning system, and provides a technical foundation for improving engine thermal efficiency. While electrification enables refined control of the engine and electric water pump, the requirements for coordinated and matched control of the engine and electric water pump are becoming increasingly stringent to improve engine stability and reliability.

[0004] Summary of the Invention

[0005] In view of this, embodiments of the present disclosure provide a vehicle control method and a vehicle.

[0006] According to some aspects of the embodiments of the present disclosure, a vehicle control method is provided, including:

[0007] In response to a water pump failure on an engine cooling circuit, obtaining a remaining charge of a battery;

[0008] controlling the target power of the engine according to the remaining power of the battery;

[0009] The vehicle cruising range is calculated based on the target power of the engine, the first duration and the remaining power of the battery; wherein the first duration is the maximum duration that the engine operates at the target power under the water pump failure condition.

[0010] In some embodiments, the control method includes:

[0011] In response to the remaining power of the battery being greater than a first target power, shutting down the engine;

[0012] The battery is controlled to drive the vehicle.

[0013] In some embodiments, the control method includes:

[0014] calculating a first distance traveled by the battery-powered vehicle;

[0015] calculating a second distance traveled by the engine-driven vehicle;

[0016] The cruising range is the sum of the first distance and the second distance.

[0017] In some embodiments, the control method further includes:

[0018] In response to the remaining power of the battery being greater than the second target power and the remaining power of the battery being less than or equal to the first target power, the engine is turned off; and the battery is controlled to drive the vehicle.

[0019] In some embodiments, the control method further includes:

[0020] The amount of electricity required for the vehicle to travel a third distance using the battery is calculated, and the amount of electricity is used as the second target amount of electricity.

[0021] In some embodiments, the control method further includes:

[0022] In response to the remaining power of the battery being equal to the second target power, the engine is controlled to drive the vehicle at a minimum target power.

[0023] In some embodiments, the control method further includes:

[0024] Obtaining a first duration corresponding to the minimum target power;

[0025] After the engine operation time reaches a first time corresponding to the minimum target power, shutting down the engine;

[0026] The battery-driven vehicle is controlled to travel a third distance.

[0027] In some embodiments, the control method further includes:

[0028] The first duration is acquired according to the target power and a mapping relationship; wherein the mapping relationship is a correspondence between the target power of the engine and the first duration.

[0029] In some embodiments, the control method further includes:

[0030] In response to the water pump operating normally and the remaining power of the battery being less than the first target power, the engine is controlled to drive the vehicle; and / or the engine is controlled to generate electricity to charge the battery.

[0031] According to some aspects of the embodiments of the present disclosure, there is provided a vehicle, comprising:

[0032] processor; and

[0033] a memory for storing processor-executable instructions;

[0034] Wherein, the processor is configured to execute the control method.

[0035] The disclosed embodiments provide a vehicle control method that, in response to a water pump failure in an engine cooling circuit, obtains the current remaining battery charge and controls the engine to operate at a target power. The vehicle's cruising range is calculated based on the target engine power, a first duration, and the remaining battery charge. The first duration is the maximum duration the engine can safely operate at the target power under a water pump failure condition. In the event of an engine water pump failure, the disclosed embodiments prevent the engine from shutting down immediately while protecting the engine. Furthermore, the vehicle's cruising range is increased under water pump failure conditions, ensuring customer safety and enhancing the customer experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a schematic diagram of an exemplary system including an engine according to an embodiment of the present disclosure;

[0037] FIG2 is a schematic diagram of an exemplary engine body according to an embodiment of the present disclosure;

[0038] FIG3 is a flow chart of an exemplary vehicle control method according to an embodiment of the present disclosure;

[0039] FIG4 is a schematic diagram of a maximum operating time curve of an engine at different power points under a water pump failure condition according to an embodiment of the present disclosure;

[0040] FIG5 is a schematic diagram of an exemplary vehicle according to an embodiment of the present disclosure.

[0041] In the accompanying drawings (which are not necessarily drawn to scale), like reference numerals may describe similar components in different views. Like reference numerals with different letter suffixes may represent different examples of similar components. The accompanying drawings generally illustrate various embodiments discussed herein by way of example and not limitation. DETAILED DESCRIPTION

[0042] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the specific embodiments described herein. Instead, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0043] In the following description, numerous specific details are provided to provide a more thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present disclosure; that is, all features of actual embodiments are not described herein, nor are well-known functions and structures described in detail.

[0044] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present disclosure. When used herein, the singular forms "a", "an", and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0045] It should be understood that “some embodiments” or “an embodiment” mentioned throughout the specification means that specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present disclosure. Therefore, “in some embodiments” or “in an embodiment” appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present disclosure, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present disclosure.

[0046] With the continuous development and popularization of intelligent and electrified vehicles, more and more engines are using electric water pumps instead of traditional mechanical water pumps to optimize and upgrade cooling systems. However, as the heart of the cooling system, if the electric water pump fails and stops, the coolant stops flowing, and the engine can overheat and be damaged in a very short time.

[0047] The water pump mentioned in the embodiments of the present disclosure may include an electric water pump, a mechanical water pump, or a centrifugal pump. The electric water pump is used as an example for illustration. The electric water pump can be a water pump for any part of the engine cooling circuit, and can be the main electric water pump of the cooling circuit, or can be an auxiliary electric water pump of the cooling circuit. The engine cooling system may include an engine water jacket surrounding the engine block and cylinder head, a vehicle radiator, a vehicle air conditioning system, and a cooling circuit connecting various components. The cooling circuit can be various pipelines for the flow of coolant.

[0048] The main electric water pump in the engine cooling circuit can be installed in the cooling circuit (or cooling pipeline) connecting the vehicle radiator and the engine. For example, the main electric water pump can be installed in the cooling pipeline connecting the engine water outlet and the radiator water inlet, or the main electric water pump can be installed in the cooling pipeline connecting the engine water inlet and the radiator water outlet. The operation of the main electric water pump can promote the forced circulation of coolant in the cooling circuit of the engine cooling system, so that the engine, air conditioning system and radiator can have thermal interaction or heat transfer, maintain the normal operating temperature of the engine, and provide heat for the air conditioning system in the vehicle cab.

[0049] According to some aspects of the embodiments of the present disclosure, FIG1 provides a schematic diagram of an engine system. As shown in FIG1 , the system may include: an engine body 11, which may include an engine block and an engine cylinder head; a water jacket surrounding the engine block and cylinder head, which may include a block water jacket portion for cooling the cylinder block and a cylinder head water jacket portion for cooling the cylinder head; a water pump 13, which may include an electric water pump, a mechanical water pump, a centrifugal pump, etc., and mainly provides coolant for the engine cooling system. The water pump 13 may be a main electric water pump, and the coolant flow rate of the water pump 13 may be adjusted by adjusting the speed of the water pump 13; a thermostat 12, which may include an electronic thermostat, a wax thermostat, etc., and the thermostat 12 may automatically adjust the heat dissipation capacity of the engine according to the temperature of the coolant; a radiator 14, which dissipates heat from the engine body 11, and the coolant flow rate flowing through the radiator 14 may be adjusted by adjusting the opening of the thermostat 13, thereby adjusting the heat dissipation capacity of the radiator 14 for the engine body 11; a water temperature sensor 15, and an engine control unit 19 (ECU). The engine cooling system or the control module, processor, etc. can obtain the current water temperature of the engine cooling system through the water temperature sensor 15, thereby adjusting the current water temperature of the engine cooling system by controlling the opening of the thermostat 12 and the speed of the water pump 13; the intake manifold temperature sensor 16, the ECU 19 can obtain the intake air temperature of the engine cooling system through the intake manifold temperature sensor 16; the engine speed sensor 17, the ECU 19 can obtain the engine speed through the engine speed sensor 17; the ambient temperature sensor 18, the ECU 19 can obtain the ambient temperature through the ambient temperature sensor 18; the ECU 19 can obtain engine operating information and information such as the current water temperature and ambient temperature of the engine cooling system, thereby controlling the opening of the thermostat 12 and the speed of the water pump 13 according to the above information, thereby controlling the cooling of the engine body 11.

[0050] In some embodiments, FIG2 shows a schematic diagram of the structure of an engine body. The gap around the periphery of the cylinder block 111 in the figure is part of the water jacket. As shown in FIG1 and FIG2 , a water pump 13 can be installed at the water outlet or inlet of the engine. A water temperature sensor 15 can be installed in the cooling circuit between the engine water outlet and the thermostat 12 to indicate the main water temperature of the engine body 11. Other water temperature sensors can also be installed to indicate the water temperature in the engine cylinder head. The water temperature sensor 15, the intake manifold temperature sensor 16, the engine speed sensor 17, the ambient temperature sensor 18, and other sensors are connected to the ECU 19 via wired or wireless communication to exchange data and feed relevant data parameters back to the ECU 19. The ECU 19 obtains various data to control the engine's start / stop, speed, and torque. The ECU 19 can also control the start and speed of the water pump 13 based on the relevant data. The engine body 11, water pump 13, radiator 14, and thermostat 12 can be connected by pipelines, which transport coolant to form a cooling circuit.

[0051] In some embodiments, ECU 19 may be part of an engine management system (EMS), and ECU 19 may be controlled by a vehicle control unit. In other embodiments, ECU 19 in the system of FIG. 1 may be a control component including various processors with computing capabilities, including but not limited to an ECU (Engine Control Unit), a VCU (Vehicle Control Unit), and an MCU (Microcontroller Unit).

[0052] In some embodiments, the system shown in Figure 1, including the engine itself, can be applied to hybrid vehicle solutions. These hybrid vehicles can be equipped with an internal combustion engine, a drive motor, a charger, and a battery. In some specific examples, the engine operates to generate electricity for the generator, and the electricity generated by the engine drives the drive motor to drive the wheels to propel the vehicle. The excess electricity from the generator driving the drive motor can be used to charge the battery. In some specific examples, the engine operates to generate electricity for the generator while the battery discharges, and the electricity generated by both drives the drive motor to drive the wheels to propel the vehicle. In some specific examples, the engine is power-coupled with a clutch to drive the wheels, and the discharged battery drives the drive motor to drive the wheels, thereby jointly propel the vehicle. In some embodiments, the engine is power-coupled with a clutch to drive the wheels, while the battery remains discharged, and the vehicle is driven solely by the engine. In some embodiments, the engine is shut down, and the discharged battery drives the drive motor to propel the vehicle, resulting in a pure electric driving mode. The operating conditions and intervention conditions of the hybrid vehicle's engine and battery can be controlled by the ECU or VCU to optimize engine thermal efficiency, fuel economy, and range.

[0053] In some specific embodiments, the engine's water pump failure may include, but is not limited to, water pump stall failure and inability to start, water pump speed failure that cannot be adjusted, water pump overload and burnout, and other failures. A water pump failure will result in the coolant being unable to provide the engine with the cooling requirements required under the current operating conditions, thereby causing the engine to overheat and shut down, or even engine damage. The disclosed embodiment targets water pump failure conditions, controls engine start and stop based on the current battery's remaining power, controls engine operation to a target power, calculates the vehicle's cruising time and mileage, and outputs them to the on-board central control display or voice reminder, thereby increasing vehicle cruising range and reducing the risk of safety accidents caused by engine damage due to water pump failure.

[0054] When a traditional engine uses a main electric water pump, the engine typically degrades by triggering an alarm and limiting torque when the main electric water pump fails. In reality, when the water pump fails, coolant cannot flow, unable to remove engine heat. The essence of torque limiting is to reduce engine power output and heat generation, but this reduction is not complete. That is, the engine still generates heat, but the heat cannot be removed by the coolant. Torque limiting can only delay the time it takes for the engine to fail due to overheating. Experimental results show that this delay can be doubled. For example, under certain operating conditions, a 30-second failure rate can be delayed to 1 minute by limiting half the torque, failing to truly protect the engine. The only real protection is engine shutdown when the main electric water pump fails. However, this can result in a very poor customer experience and can even be dangerous, leading to numerous complaints. In view of this, the disclosed embodiments provide a vehicle control method that, in the event of a water pump failure, prevents the engine from shutting down immediately while protecting the engine, and maximizes driving time, ensuring customer safety and enhancing the customer experience.

[0055] According to some aspects of the embodiments of the present disclosure, FIG3 provides a vehicle control method, including:

[0056] In response to a water pump failure on an engine cooling circuit, obtaining a remaining charge of a battery;

[0057] controlling the target power of the engine according to the remaining power of the battery;

[0058] The vehicle's cruising range is calculated based on the target engine power, a first duration, and the remaining battery charge; wherein the first duration is the maximum duration for which the engine can operate at the target power under the water pump failure condition. The first duration is the maximum safe duration for which the engine can operate at the target power without being damaged if the water pump fails.

[0059] The engine, vehicle, and vehicle control method provided by the embodiments of the present disclosure can be applied to various hybrid vehicle solutions, including but not limited to extended-range hybrid vehicles. When the battery is fully charged, the power battery drives the motor to provide the driving power required by the entire vehicle, and the engine can be idle at this time. When the battery power is depleted to a certain level, the engine starts, causing the generator to generate electricity to drive the motor, or the engine directly drives the wheel end to drive the vehicle, and the excess power is used to charge the battery. When the power returns to the set value, the engine is shut down and the battery is used to drive the motor.

[0060] In some embodiments, to ensure efficient engine operation, achieve stable power output, and maximize thermal efficiency, the engine can operate at multiple specific power points D. The engine generates electricity under the operating conditions of power point D. Power point D can be experimentally calibrated during the engine design and testing phase. The lowest power point among the multiple power points is recorded as D0. For example, power point D can be characterized by speed, torque, or power, such as D1 (speed 1000 rpm, torque 50 Nm), D2 (speed 3000 rpm, torque 100 Nm). D1 and D2 can also be characterized by the output power corresponding to the speed and torque. The engine can generate electricity at one of the multiple power points to drive the electric motor to drive the vehicle, or the engine can directly drive the wheel end to drive the vehicle; or the engine can generate electricity to charge the battery, and the battery discharges to drive the electric motor to drive the vehicle.

[0061] Figure 4 shows a schematic diagram of curves corresponding to multiple first durations and multiple specific power points. This curve can be used during the engine design and testing phase to simulate a water pump failure by shutting down or removing the engine's water pump (e.g., the main electric water pump). The curve is then plotted to measure the maximum safe operating time of the engine at a specific power point, denoted as curve T = f(D), where T is the first duration. During operation at a specific power point for the first duration, the engine temperature remains within a safe, stable operating range and is protected from overheating. However, after exceeding the first duration, overheating may result in damage.

[0062] In the embodiment of the present disclosure, the engine is controlled to run to the target power according to the current remaining power of the battery. This can be understood as the engine running at the power point shown in the example of FIG4 , that is, the engine is controlled to run at the target power point, such as a speed of 1000 rpm and a torque of 50 Nm, or the engine is controlled to run at the power at the speed and torque as the target power. Among them, when the speed is 0, the torque is 0, and the engine output power is 0, that is, the engine is shut down. When the battery power is high, the engine target power is 0 and does not participate in vehicle driving. Fault degradation operations such as torque limiting, speed reduction, or even shutdown of the engine may not be immediately taken. The mileage of the vehicle driven solely by the battery and the mileage of the vehicle driven solely by the engine can be calculated based on the remaining battery power and the first time length T, and the mileage can be reported by voice or by reminding the customer to go to a repair shop for repair in time. When the battery power is low, the engine needs to generate electricity or directly drive the vehicle, and / or charge the battery. The engine can be engaged when the battery life is only a certain distance (e.g., a third distance). The engine can be limited to run at the lowest power point D0 for a corresponding first time and then shut down. The vehicle can be driven purely by the battery for a limp third distance, such as 1 kilometer, and the customer can be reminded of the vehicle's current maximum cruising range in real time by voice or text, reminding the customer to go to a repair point in time.

[0063] In some embodiments, the control method includes:

[0064] In response to the remaining power P of the battery being greater than a first target power P1, shutting down the engine;

[0065] The battery is controlled to drive the vehicle.

[0066] In some embodiments, the control method further includes:

[0067] In response to the water pump operating normally and the remaining power P of the battery being less than the first target power P1, the engine is controlled to drive the vehicle; and / or the engine is controlled to generate electricity to charge the battery.

[0068] When the water pump is operating normally, the first target power level P1 can serve as the critical power level for starting the vehicle's engine. When P>P1, the engine may not start, and the battery will drive the electric motor to drive the vehicle. At higher speeds or when acceleration is required, the engine can work in conjunction with the battery to drive the vehicle to achieve a greater power response. When P≤P1, the engine starts, driving the generator to generate electricity and drive the electric motor to drive the vehicle, or the engine directly drives the wheels to drive the vehicle, with excess engine power used to charge the battery.

[0069] In some embodiments, when a water pump failure occurs, the control method further includes:

[0070] The first duration is obtained based on the target power and a mapping relationship; wherein the mapping relationship is a correspondence between the engine target power and the first duration. The mapping relationship may be T = f(D) as shown in Figure 4. This mapping relationship may be experimentally calibrated during the engine testing phase and stored in the vehicle's memory for use by processors such as the ECU, VCU, and MCU to control vehicle driving under corresponding operating conditions.

[0071] In some embodiments, the control method includes:

[0072] Calculating a first distance for the vehicle to be driven solely by the battery based on the remaining battery charge;

[0073] Calculating a second distance traveled by the vehicle driven solely by the engine according to the target power of the engine and the first duration;

[0074] The cruising range is the sum of the first distance and the second distance.

[0075] When the water pump fails, the current remaining battery power is obtained. When the remaining battery power is sufficient and greater than the first target power, P>P1, the vehicle can maintain the current power output without fault degradation. At this time, the engine can be stopped, and the battery drives the electric motor to make the vehicle move. However, an alarm will be issued to indicate that the main electric water pump of the engine has failed. Combined with the current vehicle operating conditions, the battery cruising range and the cruising range when the engine works alone, the water pump does not work, and the engine is not damaged are calculated (combined with T=f(D)). The sum of the two is the maximum cruising range under the current operating conditions without damage to the engine. The customer is reminded by voice or text to go to the repair point within this time. The operating conditions of the engine driving the vehicle alone may include: the engine generates electricity to drive the electric motor to make the vehicle move, or the engine directly drives the wheel end to make the vehicle move.

[0076] For example, the maximum cruising range of the vehicle when driving purely on electricity can be calculated based on the remaining power P of the battery, which is the first distance; the target power of a point and the corresponding first duration T can be obtained from the curve T=f(D) shown in Figure 4, and the maximum cruising range without engine damage can be calculated based on the first duration T, which is the second distance. The sum of the first distance and the second distance is the maximum cruising range without engine damage while maintaining the current operating conditions. Voice or text can be used to remind customers to go to the repair point within this time. The calculation of the first distance and the second distance can be combined with the predicted value calculated based on the current vehicle speed or average vehicle speed, and can be a real-time value that changes with the delay of driving time and changes in vehicle speed. The engine may not be started at this stage, and the target power is the power when the engine needs to intervene when the power drops to a certain level, or the power corresponding to the engine taking fault degradation in response to a water pump failure.

[0077] When the battery is low and the engine's main electric water pump fails, the power required to limp home on pure electric power for a specified distance is calculated. For example, the power required to travel the third distance is denoted as P0. Depending on the battery level, the control method can control the engine in multiple stages based on the remaining battery charge. The third distance can be a calibrated value based on battery and engine performance testing, such as 1 km, or other mileage values.

[0078] In some embodiments, when the water pump fails, the control method further includes:

[0079] In response to the remaining power P of the battery being greater than the second target power P0 and the remaining power P of the battery being less than or equal to the first target power P1, the engine is turned off; and the battery is controlled to drive the vehicle.

[0080] In some embodiments, the control method further includes:

[0081] The amount of electricity required for the vehicle to travel a third distance using the battery alone is calculated, and the amount of electricity is used as the second target electricity P0.

[0082] In some embodiments, the control method further includes:

[0083] In response to the remaining power of the battery being equal to the second target power P0, the engine is controlled to drive the vehicle alone at the minimum target power.

[0084] In some embodiments, the control method further includes:

[0085] Obtaining a first duration corresponding to the minimum target power;

[0086] After the engine operation time reaches a first time corresponding to the minimum target power, shutting down the engine;

[0087] The battery is controlled to drive the vehicle alone for a third distance.

[0088] In some embodiments, when the water pump fails, when the remaining battery power P∈(P0, P1], P is not equal to P0, and P may be equal to P1, the entire vehicle may not take fault degradation, and the engine will not be started, instead of the traditional starting engine charging, and the vehicle will still run purely electrically. An alarm prompts the engine electric water pump failure. Combined with the current vehicle operating conditions, the cruising range of the purely electric vehicle with the remaining battery power and the cruising range when the engine works alone and the water pump does not work without damage to the engine are calculated (combined with T=f(D)). The sum of the two is the maximum cruising range of the vehicle when the current operating conditions are maintained and the engine is not damaged, and the customer is reminded by voice or text to go to the repair point within this time. In other embodiments, when the water pump is operating normally and the battery has a remaining power P∈(P0, P1], the engine is started to charge the battery, and when the water pump fails, the embodiment of the present disclosure does not start the engine at this stage, thereby protecting the engine.

[0089] In some embodiments, when a water pump fails and the battery's remaining charge reaches P = P0, the vehicle will be degraded to a faulty state. The engine will operate at its lowest power, or at the lowest power point D0 shown in Figure 4, driving the electric motor or the direct-drive wheel drive, without charging the battery. Simultaneously, an alarm will continue to indicate the water pump failure, and the vehicle's range will be updated. The range is calculated based on the time T = f(D0) during which the engine operates at D0 to ensure no engine damage. The battery range is not considered the vehicle's current range.

[0090] In some embodiments, after the engine operates at the lowest power point D0 for a first time period T=f(D0), the engine is immediately shut down, the vehicle limps in pure electric mode, and a text or voice prompt is given to the customer that the vehicle can continue for a third distance, for example, 1 km.

[0091] The disclosed embodiment can be combined with a hybrid strategy. After the engine water pump fails, torque is not immediately limited. Instead, a protection strategy is developed and engine operation is controlled based on the time it takes for the water pump to stop without damaging the engine under different engine operating conditions. A water pump failure protection strategy can be developed in hybrid scenarios based on different power levels. When the battery remaining charge is high and the water pump fails, fault degradation is not triggered, but a reminder is triggered, the vehicle operates in pure electric mode, and the range is calculated. When the battery remaining charge falls below a certain limit, the engine should start, but if the water pump fails, the engine is not started and the vehicle continues to operate in pure electric mode. This does not trigger fault degradation, but a reminder is triggered and the range is calculated. When the battery remaining charge further decreases, power is reserved for the last kilometer, triggering fault degradation, operating the engine at its lowest power point, and a reminder is triggered to calculate the range. After the calculated water pump failure protection time is reached, the engine stops, the vehicle operates in pure electric mode, and a reminder is prompted that the vehicle can travel a final 1 km in pure electric mode. Therefore, when the engine water pump fails, the embodiment of the present disclosure can prevent the engine from shutting down immediately while protecting the engine, and can increase the cruising time as much as possible, ensuring customer safety and improving customer experience.

[0092] According to some aspects of the embodiments of the present disclosure, FIG5 provides a vehicle 400, which may include at least:

[0093] Processor 401; and

[0094] a memory 402 for storing instructions executable by the processor 401;

[0095] The processor 401 is configured to execute the above control method.

[0096] As shown in Figure 5, the vehicle may include a processor 401, a communication interface 403 and a memory 402. The processor 401 and the memory 402 are coupled and exchange data through the communication interface 403. The processor 401 can control the overall operation of the vehicle 400, including but not limited to the vehicle control method provided in the embodiment of the present disclosure. The communication interface 403 can enable the on-board electronic device to communicate with other terminals or servers through the network. The memory 402 is configured to store instructions and applications executable by the processor 401, and can also cache data to be processed or processed by the processor 401 and various modules in the on-board electronic device (for example, image data, audio data, voice communication data and video communication data). It can be implemented by flash memory (FLASH) or random access memory (RAM). Data can be transmitted between the processor 401, the communication interface 403 and the memory 402 through the bus 404. Among them, the processor 401 is used to execute some or all steps in the above-mentioned vehicle operation control method.

[0097] According to some aspects of the embodiments of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, some or all of the steps in the above method are implemented.

[0098] The storage medium can be a magnetic random access memory (FRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory, a magnetic surface storage, an optical disc, or a compact disc read-only memory (CD-ROM).

[0099] In some embodiments, executable instructions may be in the form of a program, software, software module, script, or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment.

[0100] As an example, executable instructions may, but need not, correspond to a file in a file system, may be stored as part of a file that stores other programs or data, such as in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinating files (e.g., files storing one or more modules, subroutines, or code portions).

[0101] As an example, executable instructions may be deployed to be executed on one electronic device, or on multiple electronic devices located at one site, or on multiple electronic devices distributed across multiple sites and interconnected by a communication network.

[0102] The above description is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present disclosure, and they should all be covered by the protection scope of the present disclosure.

Claims

1. A control method for a vehicle, characterized in that, Including: In response to a water pump failure on the engine cooling circuit, obtain the remaining power of the battery; Control the target power of the engine according to the remaining power of the battery; Calculate the vehicle's cruising range according to the target power of the engine, the first duration, and the remaining power of the battery; wherein, the first duration is the maximum duration for the engine to operate at the target power under the water pump failure condition.

2. The control method according to claim 1, wherein The control method includes: In response to the remaining power of the battery being greater than the first target power, turn off the engine; Control the battery to drive the vehicle.

3. The control method according to claim 2, wherein The control method includes: Calculate the first distance that the battery drives the vehicle; Calculate the second distance that the engine drives the vehicle; The cruising range is the sum of the first distance and the second distance.

4. The control method according to claim 2, wherein The control method further includes: In response to the remaining power of the battery being greater than the second target power and the remaining power of the battery being less than or equal to the first target power, turn off the engine; control the battery to drive the vehicle.

5. The control method according to claim 4, characterized in that The control method further includes: Calculate the power required for the vehicle to travel a third distance driven by the battery, and use the power as the second target power.

6. The control method according to claim 5, wherein The control method further includes: In response to the remaining power of the battery being equal to the second target power, control the engine to drive the vehicle at the minimum target power.

7. The control method according to claim 6, wherein The control method further includes: Obtain the first duration corresponding to the minimum target power; After the engine operation duration reaches the first duration corresponding to the minimum target power, turn off the engine; Control the battery to drive the vehicle for a third distance.

8. The control method according to claim 1, wherein The control method further includes: Obtain the first duration according to the target power and the mapping relationship; wherein, the mapping relationship is the corresponding relationship between the target power of the engine and the first duration.

9. The control method according to claim 2, characterized in that The control method further includes: In response to the water pump operating normally and the remaining power of the battery being less than the first target power, control the engine to drive the vehicle; and / or, control the engine to generate electricity to charge the battery.

10. A vehicle, characterized in that, Including: A processor; And A memory for storing processor-executable instructions; Wherein, the processor is configured to execute the control method according to any one of claims 1 to 9.

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