Range extender shutdown protection method, device and equipment and storage medium

Abstract

The invention provides a range extender shutdown protection method, device and equipment and a storage medium. The method comprises the steps that an electronic water pump in an extended-range electric vehicle is monitored; if it is monitored that the electronic water pump is in the idling state for the first time, the electronic water pump is controlled to operate at a preset first rotating speed and a target rotating speed, and the target rotating speed is determined by the current load of the engine; after the electronic water pump operates at the preset first rotating speed, if it is monitored that the electronic water pump is in the idle state for the second time, the electronic water pump is controlled to operate at the sequence of the preset second rotating speed and the target rotating speed, and the preset first rotating speed and the preset second rotating speed are lower than the minimum rotating speed of normal operation; after the electronic water pump runs at the preset second rotating speed, if it is monitored that the electronic water pump is in the idling state for the third time, the range extender is controlled to enter the shutdown state. Thus, through determination of three times of monitoring, the range extender is controlled to stop while the idling of the electronic water pump is rapidly and accurately recognized, and the risk of high-temperature cylinder scoring of the engine is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of range extenders, and in particular to a range extender shutdown protection method, device, equipment and storage medium. Background Art

[0002] In an extended-range electric vehicle, the range extender is required to charge the battery of the electric vehicle and provide additional power to significantly increase the range of the electric vehicle. The engine is one of the core components of the range extender. It generates mechanical energy by burning fuel and then drives the generator to convert mechanical energy into electrical energy, thereby extending the range of the electric vehicle. In this process, the heat dissipation of the engine is particularly important, which is directly related to the performance of the engine. Therefore, a water pump is needed to cool the engine. In the related art, in order to improve the heat dissipation efficiency of the engine, an electronic water pump is usually used to accurately cool the engine, provide a stable cooling effect for the engine, and ensure the efficient and stable operation of the engine. However, the operation of the electronic water pump depends on a stable power supply and a precise control system. Once the power is interrupted or the control system fails, the electronic water pump may idle, causing it to be unable to work effectively, the coolant circulation is interrupted, the engine temperature rises rapidly, there are risks such as engine overheating and cylinder pulling, and the range extender is damaged. Therefore, if it is identified that the electronic water pump is idling, the range extender needs to be shut down for protection.

[0003] However, idling identification usually relies on sensors installed on the electronic water pump. The sensor's acquisition accuracy directly affects the accuracy of idling identification, and false alarms may occur. In addition, if the electronic water pump is directly restarted in the event of a false alarm, greater mechanical stress will be generated, thereby accelerating motor wear and increasing NVH (noise, vibration and harshness) levels. Summary of the invention

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0005] In view of the above-mentioned shortcomings of the prior art, the present application discloses a range extender shutdown protection method, device, equipment and storage medium to solve the above-mentioned technical problem of how to accurately identify the idling of the electronic water pump to shut down the range extender for protection.

[0006] In a first aspect, the present application provides a range extender shutdown protection method, the method comprising: monitoring the state of an electronic water pump in a range-extended electric vehicle; if the electronic water pump is detected to be in an idling state for the first time, controlling the electronic water pump to operate in the order of a preset first speed and a target speed, wherein the target speed is determined by the current load of the engine; after the electronic water pump has been running at the preset first speed, if the electronic water pump is detected to be in an idling state for the second time, controlling the electronic water pump to operate in the order of a preset second speed and the target speed, wherein the preset first speed and the preset second speed are lower than the minimum speed of the electronic water pump during normal operation; after the electronic water pump has been running at the preset second speed, if the electronic water pump is detected to be in an idling state for the third time, generating a shutdown command to control the range extender to enter a shutdown state.

[0007] In one embodiment of the present application, if the electronic water pump is monitored for the first time to be in an idling state, the electronic water pump is controlled to run at the preset first speed for a preset first time period, and then the electronic water pump is adjusted to run at the target speed; if the electronic water pump is monitored for the second time to be in an idling state, the electronic water pump is controlled to run at the preset second speed for a preset second time period, and then the electronic water pump is adjusted to run at the target speed, and the preset second time period is greater than the first preset time period.

[0008] In one embodiment of the present application, if the electronic water pump is monitored for the third time to be in an idling state, a shutdown command is generated, including: if the electronic water pump is monitored for the third time to be in an idling state, the electronic water pump is controlled to run at a preset third speed for a preset third time period, and then the electronic water pump is controlled to stop, and the shutdown command is generated; wherein the preset third speed is greater than the preset first speed and the preset second speed, and the preset third time period is greater than the preset second time period.

[0009] In one embodiment of the present application, if the electronic water pump is monitored for the third time to be in an idling state, a shutdown command is generated, including: if the electronic water pump is monitored for the third time to be in an idling state, a preset shutdown fault level is generated using the electronic water pump, and a shutdown command is generated using the engine in response to the preset shutdown fault level.

[0010] In one embodiment of the present application, after the electronic water pump is monitored for the first time to be in an idling state, it also includes: using the engine to monitor the speed of the electronic water pump; if the speed of the electronic water pump is monitored to be a preset speed threshold, and the current speed of the engine is greater than the preset speed threshold for a preset fourth time period, the range extender is controlled to enter a shutdown state.

[0011] In one embodiment of the present application, monitoring whether the electronic water pump is in an idling state includes: monitoring the operating parameters of the electronic water pump, the operating parameters including at least one of flow, pressure, and current; if the operating parameters are less than a preset threshold, it is determined that the electronic water pump is in an idling state.

[0012] In a second aspect, the present application provides a range extender shutdown protection device, the device comprising: a state monitoring module, for monitoring the state of an electronic water pump in an extended-range electric vehicle; a first monitoring module, for controlling the electronic water pump to operate in the order of a preset first speed and a target speed if it is detected for the first time that the electronic water pump is in an idling state, the target speed being determined by the current load of the engine; a second monitoring module, for controlling the electronic water pump to operate in the order of a preset second speed and a target speed if it is detected for the second time that the electronic water pump is in an idling state after the electronic water pump has been operating at the preset first speed, the preset first speed and the preset second speed being lower than the minimum speed of the electronic water pump during normal operation; a third monitoring module, for generating a shutdown command to control the range extender to enter a shutdown state if it is detected for the third time that the electronic water pump is in an idling state after the electronic water pump has been operating at the preset second speed.

[0013] In one embodiment of the present application, the first monitoring module also includes: a speed monitoring unit, which is used to use the engine to monitor the speed of the electronic water pump; if the speed of the electronic water pump is monitored to be a preset speed threshold, and the current speed of the engine is greater than the preset speed threshold for a preset fourth time period, the range extender is controlled to enter a shutdown state.

[0014] In a third aspect, the present application also provides an electronic device, comprising: a processor, a memory and a communication bus; the communication bus is used to connect the processor and the memory; the processor is used to execute a computer program stored in the memory to implement the method described in the above embodiments.

[0015] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor of a computer, the computer executes the method described in the above embodiments.

[0016] Beneficial effects of the present application: The present application proposes a method, device, equipment and storage medium for protection of shutdown of a range extender. By monitoring the state of the electronic water pump in the range-extended electric vehicle; if the electronic water pump is detected to be in an idling state for the first time, the electronic water pump is controlled to run in the order of a preset first speed and a target speed, and the target speed is determined by the current load of the engine; after the electronic water pump runs at the preset first speed, if the electronic water pump is detected to be in an idling state for the second time, the electronic water pump is controlled to run in the order of a preset second speed and a target speed, and the preset first speed and the preset second speed are lower than the minimum speed for normal operation; after the electronic water pump runs at the preset second speed, if the electronic water pump is detected to be in an idling state for the third time, the range extender is controlled to enter a shutdown state. In this way, on the one hand, after three consecutive idling monitorings, the false alarm of idling is greatly reduced, and the idling failure of the electronic water pump can be identified quickly and accurately. In addition, in the first two monitorings, it runs at a lower preset first speed and preset second speed, and then recovers to the target speed, avoiding damage and increased NVH levels caused by repeated restarting of the electronic water pump; on the other hand, the range extender is shut down in time to avoid long-term operation of the engine in a water-deficient state, effectively reducing the risk of cylinder scuffing due to excessive engine temperature.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 is a schematic diagram of an implementation environment of a range extender shutdown protection method shown in an exemplary embodiment of the present application;

[0020] Figure 2 is a flow chart of a range extender shutdown protection method shown in an exemplary embodiment of the present application;

[0021] Figure 3 is a schematic diagram of controlling the shutdown of an electronic water pump shown in an exemplary embodiment of the present application;

[0022] Figure 4 is a schematic diagram of a range extender shutdown control shown in an exemplary embodiment of the present application;

[0023] Figure 5is a block diagram of a range extender shutdown protection device shown in an exemplary embodiment of the present application;

[0024] Figure 6 It is a structural diagram of a computer system suitable for implementing the electronic device of the present application, shown as an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0025] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0027] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present application difficult to understand.

[0028] In the extended-range electric vehicle, the engine and the electronic water pump are two key components in the range extender. The relationship between the two is interdependent and mutually reinforcing. They work together to ensure the normal operation and high-efficiency performance of the range extender. The engine is responsible for generating electricity to extend the cruising range, while the electronic water pump is responsible for the cooling system to ensure the normal operating temperature of the engine. Among them, the engine in the range extender does not directly drive the vehicle to travel, but generates heat energy by burning fuel, and then converts the heat energy into mechanical energy to drive the crankshaft of the engine to rotate. The crankshaft drives the generator in the range extender to rotate, converting the mechanical energy into electrical energy, thereby extending the vehicle's cruising range. The electronic water pump is an important component in the cooling system of the range extender. It is used to drive the coolant circulation and provide a stable cooling effect for the engine. By accurately controlling the speed of the water pump, the electronic water pump can ensure that the engine runs at the most suitable temperature, thereby improving the thermal efficiency and reliability of the engine. At the same time, the operating state of the engine will also affect the working mode and speed regulation of the electronic water pump. The electronic water pump can adjust its own speed in real time according to the actual working state of the engine (such as load) to meet the cooling needs of the engine under different working conditions.

[0029] See also Figure 1 , is a schematic diagram of an implementation environment of a range extender shutdown protection method shown in an exemplary embodiment of the present application. Figure 1 As shown, the implementation environment includes an extended-range electric vehicle 110 and a controller 120, wherein the controller 120 is embedded in the extended-range electric vehicle 110 and is used to implement the range extender shutdown protection method. The controller 120 includes but is not limited to an electronic control unit (Electronic Control Unit, ECU) in an electronic water pump, an engine ECU, etc. The state of the electronic water pump in the extended-range electric vehicle 110 is monitored by the controller 120; if the electronic water pump is detected to be in an idling state for the first time, the electronic water pump is controlled to operate in the order of a preset first speed and a target speed, and the target speed is determined by the current load of the engine, in an attempt to restore the normal operation of the electronic water pump; after the electronic water pump has been running at the preset first speed, if the electronic water pump is detected to be in an idling state for the second time, the electronic water pump is controlled to operate at a preset second speed, and then restored to the target speed; after the electronic water pump has been running at the preset second speed, if the electronic water pump is detected to be in an idling state for the third time, a shutdown command is generated to control the range extender to enter a shutdown state. In this way, after three monitorings, the idling fault of the electronic water pump can be accurately identified, and the range extender can be controlled to shut down to avoid the risk of high-temperature cylinder pulling of the engine.

[0030] See also Figure 2 , is a flow chart of a range extender shutdown protection method shown in an exemplary embodiment of the present application. The method can be applied to Figure 1The implementation environment shown in the figure may also be applicable to other exemplary implementation environments. It should be understood that this embodiment does not limit the implementation environment to which the method is applicable. Figure 2 As shown, in an exemplary embodiment, the range extender shutdown protection method includes at least steps S210 to S240, which are described in detail as follows:

[0031] Step S210, monitoring the status of the electronic water pump in the extended-range electric vehicle.

[0032] Specifically, the operating parameters of the electronic water pump are monitored, and the operating parameters include at least one of flow rate, pressure, and current; if the operating parameter is less than a preset threshold, it is determined that the electronic water pump is in an idling state.

[0033] In one embodiment of the present application, idling is a type of failure of the electronic water pump, which may be caused by insufficient coolant circulating in the electronic water pump, pipe blockage, or a failure of the electronic water pump itself. If the idling failure of the water pump is not identified and handled in time, it will cause the engine to overheat and damage the range extender. Therefore, it is necessary to monitor whether the operating parameters of the electronic water pump are abnormal. The operating parameters may include only one parameter, for example, monitoring the flow rate of the electronic water pump cycle, that is, the amount of fluid that the electronic water pump can deliver per unit time. If the flow rate is less than a preset flow rate threshold, it is determined that the electronic water pump is in an idling state; or, the operating parameters include multiple parameters at the same time, for example, simultaneously detecting the flow rate, pressure at the inlet, and current of the electronic water pump. If any one or more parameters of the flow rate, pressure, and current of the electronic water pump are lower than their respective corresponding preset thresholds, and the duration exceeds a preset time range, it is determined that the electronic water pump is in an idling state, so as to improve the accuracy and reliability of idling detection.

[0034] Step S220: If it is first detected that the electronic water pump is in an idling state, the electronic water pump is controlled to run in the order of a preset first speed and a target speed, wherein the target speed is determined by the current load of the engine.

[0035] In one embodiment of the present application, if the electronic water pump is detected to be in an idling state for the first time, the electronic water pump is controlled to run at a preset first speed for a preset first time period, and then the electronic water pump is adjusted to run at a target speed. When the electronic water pump is running normally, the speed varies within a range, and the target speed is a value within the range.

[0036] In one embodiment of the present application, since the electronic water pump is in an idling state, if the water pump continues to run at a high speed, it may aggravate the wear of the water pump and even cause damage to the water pump. At the same time, since the coolant cannot circulate effectively, the engine may overheat and cause serious damage. Therefore, when it is identified that the electronic water pump is in an idling state, it is necessary to immediately reduce its speed to a smaller preset first speed to reduce the potential damage to the electronic water pump and the engine due to idling. Among them, the preset first speed can be set to be less than the minimum speed for normal operation of the electronic water pump, and the preset first duration is also set to be shorter. For example, when the minimum speed is 2000r / min (revolutions per minute), the maximum first speed is set to 1500r / min, and the preset first duration is set to 1s (seconds).

[0037] In one embodiment of the present application, in order to avoid the idling of the electronic water pump being only a temporary fault, and if the electronic water pump is directly restarted, it may accelerate its wear and cause NVH problems, therefore, after the electronic water pump is first identified to be idling, it is first operated at a speed lower than the lowest speed during normal operation as a transition, and then an attempt is made to restore the normal speed of the electronic water pump, that is, to restore it to the target speed, so that the mechanical parts of the electronic water pump gradually adapt to the working state, thereby reducing the impact and NVH problems caused by the sudden restoration of the normal speed. In addition, the fact that the electronic pump is first running at a speed lower than the lowest speed can be used as an indicator that the electronic water pump may be idling, and when the electronic water pump is running at a low speed, the flow rate of the coolant is relatively slow, which can reduce the generation of coolant bubbles, and to a certain extent help improve the accuracy of subsequent idling monitoring.

[0038] In one embodiment of the present application, the target speed can also be determined in combination with the current temperature, current load and current speed of the engine. For example, the historical operation data of the engine is obtained, and the historical operation data includes different temperatures, different loads and different speeds of the engine's historical operation; different combinations formed by different temperatures, different loads and different speeds of the engine are determined; the speed of the electronic water pump corresponding to each combination is calibrated to obtain a speed calibration table; the speed calibration table is queried according to the current temperature, current load and current speed of the engine to determine the target speed, so as to flexibly adjust the speed of the electronic water pump to ensure that if the electronic water pump resumes normal operation, its speed is suitable for the current operation requirements of the engine.

[0039] Step 230 , after the electronic water pump has been running at the preset first speed, if it is detected for the second time that the electronic water pump is in an idling state, the electronic water pump is controlled to run at the preset second speed and the target speed in that order.

[0040] In one embodiment of the present application, if the electronic water pump is monitored for the second time to be in an idling state, the electronic water pump is controlled to run at a preset second speed for a preset second time period, and then the electronic water pump is adjusted to run at a target speed, and the preset second time period is greater than the first preset time period.

[0041] In one embodiment of the present application, the preset first speed and the preset second speed are both lower than the minimum speed for normal operation of the electronic water pump, and can be adjusted according to the configuration of the electronic water pump in actual applications, and the preset second speed and the preset first speed can be set to the same speed. In this way, the electronic water pump first runs at a lower preset first speed or preset second speed, and then gradually recovers to the target speed, avoiding the sudden change of the speed of the electronic water pump, greatly reducing the probability of damage to the electronic water pump and the increase in NVH level, especially compared to the method of repeatedly restarting the electronic water pump to try to restore the normal working state, that is, the speed of the electronic water pump suddenly drops to 0, and then runs directly from static to the target speed. In addition, if it is recognized that the speed drops directly to 0 after idling, there will be a risk of engine overheating because the engine is still running at this time.

[0042] In one embodiment of the present application, due to the randomness and uncertainty of bubbles, when they pass through the electronic water pump, they will change the pressure and flow state of the coolant in the electronic water pump, affecting the accuracy of the electronic water pump idling detection. Especially under high pressure, high speed and high temperature conditions, the impact of bubbles is more significant. Therefore, while avoiding too many repeated idling detections, in order to further ensure the accuracy of idling judgments, when idling is detected twice in a row, the electronic water pump is monitored for a third time to improve the accuracy of idling monitoring.

[0043] Step S240: After the electronic water pump runs at the preset second speed, if it is detected for the third time that the electronic water pump is in an idling state, a shutdown command is generated to control the range extender to enter a shutdown state.

[0044] In one embodiment of the present application, if the electronic water pump is detected to be idling for the third time, it is directly determined that the electronic water pump has an idling fault, and if the extended-range electric vehicle is in driving, an alarm message is continuously issued to remind the user in the vehicle. In addition, since the range extender includes an engine, the engine may overheat due to lack of water, so it is necessary to control the range extender to shut down to achieve the purpose of protecting the engine.

[0045] In one embodiment of the present application, in order to avoid the problem that after the electronic water pump stops due to an idling fault, the engine is still at a high temperature, the heat inside the engine cannot be dissipated in time, causing the engine to overheat or even damage the engine, therefore, in order to further reduce the risk of high-temperature cylinder pulling of the engine, when the electronic water pump is detected to be in an idling state for the third time, the electronic water pump is controlled to run at a preset third speed for a preset third time, and then the electronic water pump is controlled to stop, and a shutdown instruction is generated. Among them, the preset third speed is greater than the preset first speed and the preset second speed, and the preset third time is greater than the preset second time, so as to better promote the circulation of the coolant and take away the heat generated by the engine.

[0046] See also Figure 3 , is a schematic diagram of controlling the shutdown of an electronic water pump according to an exemplary embodiment of the present application. Figure 3 As shown, the preset first speed and the second preset speed are both set to 1500r / min, the preset third speed is set to 2700r / min, the preset first duration, the preset second duration and the preset third duration are set to 1s, 5s, and 1min (minutes) respectively, until the third idling detection is completed, and the electronic water pump is controlled to stop after the preset third duration and no longer runs. In addition, the process of adjusting the preset first speed and the preset second speed to the target speed is gradually increased.

[0047] In one embodiment of the present application, the preset third speed is usually set to be greater than the minimum speed of normal operation of the electronic water pump to more effectively cool the engine. It can be adjusted according to the configuration of the electronic water pump in actual application and is not limited to this.

[0048] In one embodiment of the present application, if the interval between two consecutive detections of idling exceeds a preset interval, the number of idling state detections is accumulated again. In addition, when the electronic water pump is detected to be in an idling state for the third consecutive time and then the electronic water pump is controlled to stop, the number of idling state detections also needs to be accumulated again.

[0049] In one embodiment of the present application, if the electronic water pump is detected to be in an idling state for the third time, the electronic water pump is used to generate a preset shutdown fault level, and the engine is used to generate a shutdown command in response to the preset shutdown fault level.

[0050] In one embodiment of the present application, a preset shutdown fault level sent by the electronic water pump is received by an electronic control unit in the engine. The preset shutdown fault level is used to indicate a fault alarm of the operation of the electronic water pump, and the range extender needs to be controlled to enter a shutdown state.

[0051] In one embodiment of the present application, in actual applications, the status of the electronic water pump is usually monitored using software related to the electronic water pump's own diagnosis. Therefore, if the software used by the electronic water pump to detect its own status is abnormal, it is impossible to timely and accurately identify idling, resulting in the electronic water pump's speed being 0 for a long time, and other high-temperature components in the engine and range extender that are still running cannot be effectively cooled, causing the engine to overheat or even damage the engine. Therefore, it is also necessary to use the engine to monitor the speed of the electronic water pump; if the speed of the electronic water pump is monitored to be a preset speed threshold, and the current speed of the engine is greater than the preset speed threshold for a preset fourth time period, the range extender is controlled to enter a shutdown state to stop the engine from rotating. Among them, the preset speed threshold is set to 0, and the preset fourth time period can be adjusted according to actual needs, and there is no restriction on this.

[0052] In one embodiment of the present application, the speed of the electronic water pump is monitored by the engine management system (EMS). The EMS collects data such as the speed of the electronic water pump and the engine during operation through sensors, and then converts the collected data from physical quantities into electrical signals for subsequent threshold comparison processing by the engine ECU. If the prerequisite for the range extender to shut down is met, a control signal (i.e., a shutdown command) for controlling the range extender is output to put the range extender into a shutdown state. In this way, even if there is a software failure in the electronic water pump, the risk of high-temperature cylinder pulling in the engine can be effectively reduced.

[0053] See also Figure 4 , is a schematic diagram of a range extender shutdown control shown in an exemplary embodiment of the present application. Figure 4 As shown, the preset speed threshold is set to 0r / min. Taking the preset fourth time duration as 20s as an example, when the engine is operating normally, if the engine management system detects that the speed of the electronic water pump is 0r / min and the current speed of the engine is greater than 0r / min, the range extender is controlled to shut down.

[0054] The range extender shutdown protection method provided in the present application has the following advantages: on the one hand, after three consecutive idling monitorings, the false alarm of idling is greatly reduced, and the idling fault of the electronic water pump can be quickly and accurately identified, and in the first two detections, it is first operated at a lower preset first speed and a preset second speed, and then restored to the target speed, avoiding damage caused by repeated restarting of the electronic water pump and an increase in NVH level; on the other hand, the range extender is shut down in time to avoid the engine running in a water-deficient state for a long time, effectively reducing the risk of cylinder scuffing due to excessive engine temperature.

[0055] See also Figure 5 , is a block diagram of a range extender shutdown protection device shown in an exemplary embodiment of the present application. The device can be applied to Figure 1 The implementation environment shown is configured in the controller 120, and may also be applicable to other exemplary implementation environments and configured in other devices. It should be understood that this embodiment does not limit the implementation environment applicable to the device. Figure 5 As shown, in an exemplary embodiment, the range extender shutdown protection device includes at least a state monitoring module 510, a first monitoring module 520, a second monitoring module 530 and a third monitoring module 540, which are described in detail as follows:

[0056] A state monitoring module 510 is used to monitor the state of the electronic water pump in the extended-range electric vehicle;

[0057] The first monitoring module 520 is used to control the electronic water pump to run in the order of a preset first speed and a target speed if it is detected for the first time that the electronic water pump is in an idling state, wherein the target speed is determined by the current load of the engine;

[0058] The second monitoring module 530 is used to control the electronic water pump to operate in the order of a preset second speed and a target speed after the electronic water pump has been operated at a preset first speed, if the electronic water pump is monitored for the second time to be in an idling state, wherein the preset first speed and the preset second speed are lower than the lowest speed of the electronic water pump during normal operation;

[0059] The third monitoring module 540 is used to generate a shutdown instruction to control the range extender to enter a shutdown state if the electronic water pump is detected to be in an idling state for the third time after the electronic water pump has been running at the preset second speed.

[0060] In one embodiment of the present application, the first monitoring module also includes: a speed monitoring unit, which is used to use the engine to monitor the speed of the electronic water pump; if the speed of the electronic water pump is monitored to be a preset speed threshold, and the current speed of the engine is greater than the preset speed threshold for a preset fourth time period, the range extender is controlled to enter a shutdown state.

[0061] It should be noted that the range extender shutdown protection device provided in the above embodiment and the range extender shutdown protection method provided in the above embodiment belong to the same concept, wherein the contents of the operations performed by each module have been described in detail in the method embodiment and will not be repeated here.

[0062] The present application also provides an electronic device, comprising: a processor, a memory and a communication bus; the communication bus is used to connect the processor and the memory; the processor is used to execute a computer program stored in the memory to implement the range extender shutdown protection method as in the above embodiment.

[0063] See also Figure 6 , shows a schematic diagram of the structure of a computer system suitable for implementing an electronic device of an embodiment of the present application. It should be noted that, Figure 6 The computer system 600 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0064] like Figure 6As shown, the computer system 600 includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 602 or the program loaded from the storage part 608 to the random access memory (RAM) 603, such as executing the method in the above embodiment. In the RAM 603, various programs and data required for system operation are also stored. The CPU 601, ROM 602 and RAM 603 are connected to each other through a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0065] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, etc.; an output section 607 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 610 as needed so that a computer program read therefrom is installed into the storage section 608 as needed.

[0066] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 609, and / or installed from a removable medium 611. When the computer program is executed by a central processing unit (CPU) 601, various functions defined in the system of the present application are executed.

[0067] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor of a computer, the computer executes the vehicle-side data forwarding method as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist independently without being assembled into the electronic device.

[0068] It should be noted that the computer-readable medium shown in the embodiment of the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared or semiconductor system, system or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, wherein a computer-readable computer program is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, system or device. A computer program contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0069] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0070] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0071] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A range extender shutdown protection method, characterized in that: The method comprises: Monitor the status of the electronic water pump in an extended-range electric vehicle; If it is detected for the first time that the electronic water pump is in an idling state, the electronic water pump is controlled to run in the order of a preset first speed and a target speed, wherein the target speed is determined by the current load of the engine; After the electronic water pump runs at the preset first speed, if it is detected for the second time that the electronic water pump is in an idling state, the electronic water pump is controlled to run in the order of the preset second speed and the target speed, wherein the preset first speed and the preset second speed are lower than the lowest speed of the electronic water pump during normal operation; After the electronic water pump runs at the preset second speed, if it is detected for the third time that the electronic water pump is in an idling state, a shutdown command is generated to control the range extender to enter a shutdown state.

2. The range extender shutdown protection method according to claim 1, characterized in that: Also includes: If it is detected for the first time that the electronic water pump is in an idling state, controlling the electronic water pump to run at the preset first speed for a preset first time period, and then adjusting the electronic water pump to run at the target speed; If the electronic water pump is detected to be in an idling state for the second time, the electronic water pump is controlled to run at the preset second speed for a preset second time, and then adjusted to run at the target speed, and the preset second time is greater than the first preset time.

3. The range extender shutdown protection method according to claim 2, characterized in that: If the electronic water pump is detected to be in an idling state for the third time, a shutdown instruction is generated, including: If the electronic water pump is monitored for the third time to be in an idling state, the electronic water pump is controlled to run at a preset third speed for a preset third time period, and then the electronic water pump is controlled to stop, and the shutdown instruction is generated; wherein the preset third speed is greater than the preset first speed and the preset second speed, and the preset third time period is greater than the preset second time period.

4. The range extender shutdown protection method according to claim 1, characterized in that: If the electronic water pump is detected to be in an idling state for the third time, a shutdown instruction is generated, including: If the electronic water pump is detected to be in an idling state for the third time, the electronic water pump is used to generate a preset shutdown fault level. A shutdown command is generated using the engine in response to the preset shutdown fault level.

5. The range extender shutdown protection method according to any one of claims 1 to 4, characterized in that: After the electronic water pump is detected to be in an idling state for the first time, the method further includes: Using the engine to monitor the rotation speed of the electronic water pump; If it is monitored that the speed of the electronic water pump is a preset speed threshold, and the current speed of the engine is greater than the preset speed threshold for a preset fourth time period, the range extender is controlled to enter a shutdown state.

6. The range extender shutdown protection method according to claim 1, characterized in that: Monitoring whether the electron is in an idling state comprises: Monitoring the operating parameters of the electronic water pump, wherein the operating parameters include at least one of flow rate, pressure, and current; If the operating parameter is less than a preset threshold, it is determined that the electronic water pump is in an idling state.

7. A range extender shutdown protection device, characterized in that: The device comprises: A status monitoring module is used to monitor the status of the electronic water pump in the extended-range electric vehicle; a first monitoring module, configured to control the electronic water pump to run in a sequence of a preset first speed and a target speed if it is detected for the first time that the electronic water pump is in an idling state, wherein the target speed is determined by a current load of the engine; A second monitoring module is used for controlling the electronic water pump to operate at a preset second speed and a target speed in that order after the electronic water pump operates at the preset first speed, if the electronic water pump is detected to be in an idling state for the second time, wherein the preset first speed and the preset second speed are lower than the lowest speed of the electronic water pump during normal operation; The third monitoring module is used to generate a shutdown instruction to control the range extender to enter a shutdown state if the electronic water pump is detected to be in an idling state for the third time after the electronic water pump runs at the preset second speed.

8. The range extender shutdown protection device according to claim 7, characterized in that: The first monitoring module also includes: A speed monitoring unit is used to use the engine to monitor the speed of the electronic water pump; if the speed of the electronic water pump is monitored to be a preset speed threshold, and the current speed of the engine is greater than the preset speed threshold for a preset fourth time period, the range extender is controlled to enter a shutdown state.

9. An electronic device, characterized in that: include: processor, memory, and communication bus; The communication bus is used to connect the processor and the memory; The processor is configured to execute the computer program stored in the memory to implement the method according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is used to make a computer execute the method according to any one of claims 1 to 6.

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