A control method, device and vehicle

Abstract

The application provides a control method, which comprises the following steps: monitoring an electric signal currently fed back by a water pump; determining a gas-liquid mixing state in a cooling liquid storage tank based on the electric signal; and controlling the water pump to execute a target strategy based on the gas-liquid mixing state, wherein the target strategy represents one of adjusting a current rotating speed of the water pump and sending a liquid signal to an electric control unit. Meanwhile, the application also provides a control device and a vehicle.

Description

Technical Field

[0001] This application relates to a control method, apparatus, and vehicle. Background Technology

[0002] During vehicle operation, coolant leaks often occur due to worn or burst water hoses and loose hose joints, leading to engine overheating and damage. When coolant is lost, the cooling system is in a gas-liquid mixture state, resulting in poor cooling performance and a rapid rise in engine temperature, especially under high load. Waiting for the coolant temperature warning light to illuminate before taking action is often too late, frequently resulting in engine damage such as cylinder scoring, blown cylinders, or blown head gaskets before the warning light is even triggered or the engine temperature has just dropped. Therefore, how to promptly detect the coolant status and effectively protect the engine is a pressing issue that needs to be addressed. Summary of the Invention

[0003] To solve the above problems, the technical solution of this application is implemented as follows:

[0004] According to one aspect of this application, a control method is provided, the method comprising:

[0005] Monitor the electrical signals currently being fed back by the water pump;

[0006] The gas-liquid mixing state inside the coolant storage tank is determined based on the electrical signal.

[0007] Based on the gas-liquid mixing state, the water pump is controlled to execute a target strategy, which represents one of adjusting the current speed of the water pump and sending a liquid signal to the electronic control unit.

[0008] In the above scheme, determining the gas-liquid mixing state in the coolant storage tank based on the electrical signal includes:

[0009] Based on a preset table, multiple first electrical signals corresponding to the current speed of the water pump are determined, and the multiple first electrical signals come from different signal groups;

[0010] The electrical signal is compared with a plurality of the first electrical signals;

[0011] If the comparison result indicates that the electrical signal belongs to the first signal range formed by the first electrical signal in the first signal group and the first electrical signal in the second signal group, and the duration of the electrical signal is greater than or equal to the preset duration, the gas-liquid mixture state is determined to be a liquid-deficient state.

[0012] If the comparison result indicates that the electrical signal belongs to the second signal range formed by the first electrical signal in the second signal group and the first electrical signal in the third signal group, and the duration of the electrical signal is greater than or equal to the preset duration, the gas-liquid mixture state is determined to be a leakage state.

[0013] If the comparison result indicates that the electrical signal is less than the first electrical signal in the third signal group, and the duration of the electrical signal is greater than or equal to a preset duration, the gas-liquid mixture state is determined to be a liquid-free state.

[0014] In the above scheme, controlling the water pump to execute the target strategy based on the gas-liquid mixing state includes at least one of the following:

[0015] If the gas-liquid mixture is in one of the following states: liquid shortage, liquid leakage, or no liquid, the current speed of the water pump is adjusted to a first speed; wherein, the first speed represents the maximum speed of the water pump.

[0016] If the gas-liquid mixture is in a state of low liquid, and the electrical signal fed back by the water pump at the first speed belongs to the third signal range formed by the second electrical signal in the first signal group and the second electrical signal in the second signal group, and the duration is greater than or equal to the preset duration, the water pump is controlled to send a low liquid signal to the electronic control unit.

[0017] If the gas-liquid mixture is in a leakage state, and the electrical signal fed back by the water pump at the first speed belongs to the fourth signal range formed by the second electrical signal in the second signal group and the second electrical signal in the third signal group, and the duration is greater than or equal to the preset duration, the water pump is controlled to send a leakage signal to the electronic control unit.

[0018] If the gas-liquid mixture is in a liquid-free state, and the electrical signal fed back by the water pump at the first speed is less than the second electrical signal in the third signal group, the water pump is controlled to send a liquid-free signal to the electronic control unit.

[0019] The method in the above scheme further includes:

[0020] Output an alarm signal corresponding to the liquid signal.

[0021] The method in the above scheme further includes:

[0022] The system detects a first electrical signal corresponding to the water pump speed when the coolant level in the coolant storage tank is at a first position; and a second electrical signal corresponding to the water pump speed when the coolant level in the coolant storage tank is at a second position (the second position being lower than the first position); and a third electrical signal corresponding to the water pump idling.

[0023] A preset table representing the mapping relationship between the pump speed and the electrical signals is constructed based on the first, second, and third electrical signals.

[0024] According to another aspect of this application, a control device is provided, the device comprising:

[0025] The monitoring unit is used to monitor the electrical signals currently fed back by the water pump;

[0026] The determining unit is used to determine the gas-liquid mixing state in the coolant storage tank based on the electrical signal;

[0027] An execution unit is configured to execute a target strategy based on the gas-liquid mixing state, the target strategy being characterized by either adjusting the current speed of the water pump or sending a liquid signal to the electronic control unit.

[0028] In the above scheme, the device further includes:

[0029] The comparison unit is used to compare the electrical signal with a plurality of first electrical signals corresponding to the current speed of the water pump; the plurality of first electrical signals come from different signal groups;

[0030] The determining unit is further configured to determine multiple first electrical signals corresponding to the current speed of the water pump based on a preset table; and to determine the gas-liquid mixing state as a liquid shortage state if the comparison result indicates that the electrical signal belongs to a first signal range formed by the first electrical signal in the first signal group and the first electrical signal in the second signal group, and the duration of the electrical signal is greater than or equal to a preset duration; to determine the gas-liquid mixing state as a leakage state if the comparison result indicates that the electrical signal belongs to a second signal range formed by the first electrical signal in the second signal group and the first electrical signal in the third signal group, and the duration of the electrical signal is greater than or equal to a preset duration; and to determine the gas-liquid mixing state as a liquid-free state if the comparison result indicates that the electrical signal is less than the first electrical signal in the third signal group, and the duration of the electrical signal is greater than or equal to a preset duration.

[0031] In the above scheme, the execution unit includes:

[0032] An adjustment unit is configured to adjust the current speed of the water pump to a first speed if the gas-liquid mixture is in a state of insufficient liquid, leakage, or no liquid; wherein the first speed represents the maximum speed of the water pump.

[0033] The transmitting unit is configured to: control the water pump to send a low-liquidity signal to the electronic control unit if the electrical signal fed back by the water pump at the first rotational speed belongs to a third signal range formed by the second electrical signal in the first signal group and the second electrical signal in the second signal group, and the duration is greater than or equal to the preset duration; control the water pump to send a leakage signal to the electronic control unit if the electrical signal fed back by the water pump at the first rotational speed belongs to a fourth signal range formed by the second electrical signal in the second signal group and the second electrical signal in the third signal group, and the duration is greater than or equal to the preset duration; and control the water pump to send a no-liquidity signal to the electronic control unit if the electrical signal fed back by the water pump at the first rotational speed is less than the second electrical signal in the third signal group.

[0034] In the above scheme, the device includes:

[0035] The output unit is used to output an alarm signal corresponding to the liquid signal.

[0036] According to a third aspect of this application, a vehicle is provided, the vehicle including the control device described in any of the preceding claims.

[0037] The control method, device, and vehicle provided in this application are a scheme for monitoring the coolant status by detecting the electrical signal fed back by the water pump. Specifically, the method monitors the current electrical signal fed back by the water pump; determines the gas-liquid mixing state in the coolant reservoir based on the electrical signal; and controls the water pump to adjust its current speed or send a liquid signal to the electronic control unit based on the gas-liquid mixing state. Thus, by monitoring the electrical signal fed back by the water pump, the coolant shortage status of the cooling system can be determined, and the gas-liquid mixing state in the coolant reservoir can be promptly identified. This allows for timely adjustments to the water pump speed or timely sending of a liquid signal to the vehicle's electronic control unit to initiate measures such as downgrading, torque limiting, or engine shutdown, thereby preventing overheating damage to the engine due to coolant shortage. Attached Figure Description

[0038] Figure 1 This is a schematic diagram illustrating the flow implementation of the control method in this application. Figure One ;

[0039] Figure 2 This is a schematic diagram illustrating the flow implementation of the control method in this application. Figure Two ;

[0040] Figure 3 This is a schematic diagram of the structural composition of the control device in this application. Figure One ;

[0041] Figure 4 This is a schematic diagram of the structural composition of the control device in this application. Figure Two . Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other. The steps shown in the flowcharts can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown here.

[0043] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Figure 1 This is a schematic diagram illustrating the flow implementation of the control method in this application. Figure One This method can be applied to various vehicles or controllers within such vehicles, including but not limited to cars, buses, and trains. For example... Figure 1 As shown, the method includes:

[0045] Step 101: Monitor the current electrical signal fed back by the water pump;

[0046] Here, the electrical signal includes, but is not limited to, the current signal and voltage signal of the water pump.

[0047] Step 102: Determine the gas-liquid mixing state (low liquid, leaking liquid, no liquid) in the coolant storage tank based on the electrical signal;

[0048] Here, when the coolant in the coolant storage tank is low, the cooling system will be in a gas-liquid mixed state, which includes a low coolant state, a leaking coolant state, and a no-coolant state.

[0049] In this application, when determining the gas-liquid mixing state in the coolant storage tank based on the electrical signal, the current speed parameter of the water pump can be obtained first; then, multiple electrical signals corresponding to the current speed of the water pump can be determined based on a preset table, wherein the multiple electrical signals come from different signal groups. The electrical signal is compared with the multiple first electrical signals respectively to obtain a comparison result. If the comparison result indicates that the electrical signal (e.g., I1) belongs to the first signal range formed by the first electrical signal (e.g., Ia1) in the first signal group (e.g., Ia) and the first electrical signal (e.g., Ib1) in the second signal group (e.g., Ib), and the duration of the electrical signal is greater than or equal to a preset duration (e.g., 5 minutes), the gas-liquid mixing state is determined to be a liquid shortage state.

[0050] If the comparison result indicates that the electrical signal belongs to the second signal range (e.g., I1∈(Ib1, Ic1)) formed by the first electrical signal (e.g., Ib1) in the second signal group (e.g., Ib) and the first electrical signal (e.g., Ic1) in the third signal group (e.g., Ic), and the duration of the electrical signal is greater than or equal to the preset duration (e.g., 5 minutes), the gas-liquid mixture state is determined to be a leakage state.

[0051] If the comparison result indicates that the electrical signal is less than the first electrical signal (e.g., Ic1) in the third signal group (e.g., Ic), and the duration of the electrical signal is greater than or equal to a preset duration (e.g., 5 minutes), then the gas-liquid mixture state is determined to be a liquid-free state.

[0052] In this application, before monitoring the electrical signal currently fed back by the water pump, the electrical signal corresponding to the water pump speed when the coolant in the coolant storage tank is at the first position can be detected to form a first signal group (e.g., Ia); and the electrical signal corresponding to the water pump speed when the coolant in the coolant storage tank is at the second position can be detected to form a second signal group (e.g., Ib); the second position is lower than the first position; and the electrical signal corresponding to the water pump when it is idling can be detected to form a third signal group (e.g., Ic); based on the first signal group, the second signal group, and the third signal group, the above-mentioned preset table characterizing the mapping relationship between the water pump speed and the electrical signal can be constructed.

[0053] Step 103: Based on the gas-liquid mixing state, control the water pump to execute a target strategy, wherein the target strategy represents one of adjusting the current speed of the water pump and sending a liquid signal to the electronic control unit.

[0054] Here, if the gas-liquid mixing state is one of a liquid shortage state, a liquid leakage state, or a liquid-free state, the current speed of the water pump (e.g., n1) is adjusted to a first speed (e.g., n2), where the first speed can be the maximum speed of the water pump. If the gas-liquid mixing state is a liquid shortage state, and the water pump is at the first speed, multiple second electrical signals corresponding to the water pump at the first speed can be determined based on the preset table. These multiple second electrical signals come from different signal groups. The electrical signal fed back by the water pump at the first speed is compared with the multiple second electrical signals. If the comparison result indicates that the electrical signal fed back by the water pump at the first speed (e.g., I2) belongs to the third signal range formed by the second electrical signal (e.g., Ia2) in the first signal group (e.g., Ia) and the second electrical signal (e.g., Ib2) in the second signal group (e.g., Ib), (e.g., I2∈(...)...)... If the gas-liquid mixture is in a leaking state, and the electrical signal (e.g., I2) fed back by the water pump at the first speed belongs to the fourth signal range (e.g., I2∈(Ic2, Ib2)) formed by the second electrical signal (e.g., Ib2) in the second signal group (e.g., Ib) and the second electrical signal (e.g., Ic2) in the third signal group (e.g., Ic)) and lasts for a duration greater than or equal to the preset duration (e.g., 5 seconds), the water pump is controlled to send a leaking signal to the electronic control unit; if the gas-liquid mixture is in a liquid-free state, and the electrical signal (e.g., I2) fed back by the water pump at the first speed is less than the second electrical signal (e.g., Ic2) in the third signal group (e.g., Ic), the water pump is controlled to send a liquid-free signal to the electronic control unit.

[0055] Here, the multiple second electrical signals and the multiple first electrical signals can be two adjacent electrical signals in the same signal group, or they can be two non-adjacent electrical signals in the same signal group. The specific settings can be determined according to actual needs.

[0056] In this application, after sending a coolant signal to the electronic control unit (ECU), a corresponding alarm signal can also be output. For example, after sending a low coolant signal to the vehicle's ECU, a first alarm signal is output to remind the driver and passengers to add coolant. The low coolant signal indicates that the coolant level is below a first position, which can be a preset lower coolant limit. As another example, after sending a leak signal to the ECU, a second alarm signal is output to remind the driver and passengers to initiate downgrading, torque limiting, or engine shutdown measures. The leak signal indicates that there is a coolant leak in the engine, requiring immediate action to prevent overheating and damage. Yet another example is that after sending a no-coolant signal to the ECU, a third alarm signal is output to alert the driver and passengers that the engine is not filled with coolant.

[0057] Because the feedback current of the electric water pump varies under different gas-liquid mixing conditions, the more gas in the cooling system, the lower the current. The control method provided in this application utilizes this principle to monitor the feedback current of the electric water pump, determine the coolant shortage in the cooling system, and thus take timely corresponding measures to avoid engine overheating losses.

[0058] Figure 2 This is a flowchart illustrating the control method in this application. Figure Two ,like Figure 2 As shown, the method includes:

[0059] Step 201: Detect the first signal group corresponding to the water pump speed when the coolant level in the coolant storage tank is at the first position; and detect the second signal group corresponding to the water pump speed when the coolant level in the coolant storage tank is at the second position, where the second position is lower than the first position; and detect the third signal group corresponding to the water pump idling.

[0060] Here, the first signal group can be represented by the first current curve Ia, the second signal group can be represented by the second current curve Ib, and the third signal group can be represented by the third current curve Ic.

[0061] Step 202: Construct a preset table representing the mapping relationship between the pump speed and the electrical signal based on the first signal group, the second signal group, and the third signal group;

[0062] Step 203: When the vehicle is running normally, obtain the current speed n1 of the water pump, and look up the corresponding Ib1, Ia1, Ic1 based on n1.

[0063] Here, the pump speed can be obtained in real time, or it can be obtained at intervals.

[0064] Step 204: If the water pump feedback current I1∈(Ib1, Ia1) and lasts for more than 5 seconds, the water pump enters the low coolant detection phase. The water pump controller adjusts the current speed n1 of the water pump to the maximum speed n2. If the water pump feedback current I2∈(Ib2, Ia2) and lasts for more than 5 seconds, a low coolant signal is sent to the ECU (electronic control unit) to indicate that the coolant is below the lower limit and the customer needs to be reminded to add coolant.

[0065] Here, I2 is the feedback current of the water pump at its maximum speed. When the water pump is at its maximum speed, the corresponding Ib2, Ia2, and Ic2 can also be obtained by looking up a table based on n2.

[0066] Step 205: If the water pump feedback current I1∈(Ic1, Ib1) and continues for more than 5 seconds, the water pump enters the leak detection phase. The water pump controller adjusts the water pump speed to the maximum speed. If the water pump feedback current I2∈(Ic2, Ib2) and continues for more than 5 seconds, a leak signal is sent to the ECU, indicating that there is a leak in the engine. Degradation measures need to be initiated, such as limiting torque or stopping the engine, to prevent the engine from overheating and being damaged.

[0067] Step 206: If the water pump feedback current I1 is less than Ic1 and lasts for more than 5 seconds, the water pump enters the coolant-free detection state. The water pump controller adjusts the water pump speed to the maximum speed. If the water pump feedback current I2 is less than Ic2 and lasts for more than 5 seconds, a coolant-free signal is sent to the ECU to indicate that the engine has not been filled with coolant.

[0068] Common scenarios here include installing a new engine or after vehicle maintenance.

[0069] The control method provided in this application detects and monitors coolant leakage or lack of replenishment by using the current detection function of the electric water pump. It can promptly identify coolant shortage, leakage, or absence, and take corresponding measures in a timely manner to avoid damage to the engine due to overheating.

[0070] Figure 3 This is a schematic diagram of the structural composition of the control device in this application. Figure One ,like Figure 3 As shown, the device includes:

[0071] Monitoring unit 301 is used to monitor the electrical signal currently fed back by the water pump;

[0072] Determining unit 302 is used to determine the gas-liquid mixing state in the coolant storage tank based on the electrical signal;

[0073] The execution unit 303 is used to execute a target strategy based on the gas-liquid mixing state, wherein the target strategy represents one of adjusting the current speed of the water pump and sending a liquid signal to the electronic control unit.

[0074] In a preferred embodiment, the device further includes:

[0075] Comparison unit 304 is used to compare the electrical signal with a plurality of first electrical signals corresponding to the current speed of the water pump; wherein the plurality of first electrical signals come from different signal groups;

[0076] The determining unit 302 is further configured to determine multiple first electrical signals corresponding to the current speed of the water pump based on a preset table; and to determine the gas-liquid mixing state as a liquid shortage state if the comparison result indicates that the electrical signal belongs to a first signal range formed by the first electrical signal in the first signal group and the first electrical signal in the second signal group, and the duration of the electrical signal is greater than or equal to a preset duration; to determine the gas-liquid mixing state as a leakage state if the comparison result indicates that the electrical signal belongs to a second signal range formed by the first electrical signal in the second signal group and the first electrical signal in the third signal group, and the duration of the electrical signal is greater than or equal to a preset duration; and to determine the gas-liquid mixing state as a liquid-free state if the comparison result indicates that the electrical signal is less than the first electrical signal in the third signal group, and the duration of the electrical signal is greater than or equal to a preset duration.

[0077] In a preferred embodiment, the execution unit 303 includes:

[0078] The adjustment unit 3031 is used to adjust the current speed of the water pump to a first speed if the gas-liquid mixing state is one of the following: insufficient liquid state, leakage state, or no liquid state; wherein the first speed is the maximum speed of the water pump.

[0079] The transmitting unit 3032 is configured to: control the water pump to send a low-liquidity signal to the electronic control unit if the electrical signal fed back by the water pump at the first speed belongs to a third signal range formed by the second electrical signal in the first signal group and the second electrical signal in the second signal group, and the duration is greater than or equal to the preset duration; control the water pump to send a leakage signal to the electronic control unit if the electrical signal fed back by the water pump at the first speed belongs to a fourth signal range formed by the second electrical signal in the second signal group and the second electrical signal in the third signal group, and the duration is greater than or equal to the preset duration; and control the water pump to send a no-liquidity signal to the electronic control unit if the electrical signal fed back by the water pump at the first speed is less than the second electrical signal in the third signal group.

[0080] In a preferred embodiment, the device includes:

[0081] The output unit 305 is used to output an alarm signal corresponding to the liquid signal.

[0082] It should be noted that the processing device provided in the above embodiments for achieving thermal protection of the engine is only illustrated by the division of the above components. In practical applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the processing described above. In addition, the control device provided in the above embodiments and the control method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0083] Figure 4 This is a schematic diagram of the structural composition of the control device in this application. Figure Two ,like Figure 4 As shown, the device includes:

[0084] The engine 401, radiator 402, water pump 403, and coolant reservoir 404 are interconnected. The engine cooling system in most automobiles primarily uses water cooling. Circulating water in the cylinder water passages cools the heated water in the passages. This heated water is introduced into the radiator 402 (water tank), cooled by air, and then returns to the water passages. When the engine 401 is running, the water pump 403 rotates, increasing the coolant pressure and forcing it to circulate. The circulating coolant carries away heat from the engine block, cylinder liners, cylinder head, and other components. When the coolant temperature has not reached the thermostat opening temperature, the coolant will directly re-enter the cylinder block from the water pump through the water circulation pipe. When coolant leaks or is low on coolant, the cooling system is in a gas-liquid mixture state, resulting in poor cooling performance and a rapid rise in engine temperature 401. Especially when engine 401 is operating under high load, waiting for the water temperature alarm to sound before taking action is often delayed. Therefore, this application monitors the current signal currently fed back by water pump 403; based on the current signal, it determines whether the gas-liquid mixture state in coolant storage tank 404 is low on coolant, leaking, or empty; and then controls water pump 403 to execute a target strategy based on the gas-liquid mixture state. The target strategy represents either adjusting the current speed of water pump 403 or sending a liquid signal to the vehicle's electronic control unit.

[0085] It should be noted that the processing device provided in the above embodiments for achieving thermal protection of the engine is only illustrated by the division of the above components. In practical applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the processing described above. In addition, the control device provided in the above embodiments and the control method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0086] This application also provides a vehicle that includes the aforementioned control device.

[0087] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0088] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0089] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0090] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0091] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method or device embodiments.

[0092] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control method, characterized in that, The method includes: Monitor the electrical signals currently fed back by the water pump; the electrical signals include at least: current signals and voltage signals; Based on a preset table, multiple first electrical signals corresponding to the current speed of the water pump are determined, and the multiple first electrical signals come from different signal groups; The electrical signal is compared with a plurality of the first electrical signals; If the comparison result indicates that the electrical signal belongs to the first signal range formed by the first electrical signal in the first signal group and the first electrical signal in the second signal group, and the duration of the electrical signal is greater than or equal to the preset duration, the gas-liquid mixing state in the coolant storage tank is determined to be a liquid shortage state. If the comparison result indicates that the electrical signal belongs to the second signal range formed by the first electrical signal in the second signal group and the first electrical signal in the third signal group, and the duration of the electrical signal is greater than or equal to the preset duration, the gas-liquid mixing state in the coolant storage tank is determined to be a leakage state. If the comparison result indicates that the electrical signal is less than the first electrical signal in the third signal group, and the duration of the electrical signal is greater than or equal to the preset duration, the gas-liquid mixture state in the coolant storage tank is determined to be a liquid-free state. Based on the gas-liquid mixing state, the water pump is controlled to execute a target strategy, which represents one of adjusting the current speed of the water pump and sending a liquid signal to the electronic control unit.

2. The control method according to claim 1, characterized in that, The strategy of controlling the water pump to execute the target strategy based on the gas-liquid mixing state includes at least one of the following: If the gas-liquid mixture is in one of the following states: liquid shortage, liquid leakage, or no liquid, the current speed of the water pump is adjusted to a first speed; wherein, the first speed represents the maximum speed of the water pump. If the gas-liquid mixture is in a state of low liquid, and the electrical signal fed back by the water pump at the first speed belongs to the third signal range formed by the second electrical signal in the first signal group and the second electrical signal in the second signal group, and the duration is greater than or equal to the preset duration, the water pump is controlled to send a low liquid signal to the electronic control unit. If the gas-liquid mixture is in a leakage state, and the electrical signal fed back by the water pump at the first speed belongs to the fourth signal range formed by the second electrical signal in the second signal group and the second electrical signal in the third signal group, and the duration is greater than or equal to the preset duration, the water pump is controlled to send a leakage signal to the electronic control unit. If the gas-liquid mixture is in a liquid-free state, and the electrical signal fed back by the water pump at the first speed is less than the second electrical signal in the third signal group, the water pump is controlled to send a liquid-free signal to the electronic control unit.

3. The control method according to claim 1, characterized in that, The method further includes: Output an alarm signal corresponding to the liquid signal.

4. The control method according to claim 1, characterized in that, The method further includes: The system includes: a first signal group corresponding to the water pump speed when the coolant level in the coolant storage tank is at a first position; a second signal group corresponding to the water pump speed when the coolant level in the coolant storage tank is at a second position (the second position being lower than the first position); and a third signal group corresponding to the water pump idling. Based on the first signal group, the second signal group, and the third signal group, a preset table is constructed to characterize the mapping relationship between the pump speed and the electrical signal.

5. A control device, characterized in that, The device includes: A monitoring unit is used to monitor the electrical signals currently fed back by the water pump; the electrical signals include at least: current signals and voltage signals; The comparison unit is used to compare the electrical signal with a plurality of first electrical signals corresponding to the current speed of the water pump; the plurality of first electrical signals come from different signal groups; The determining unit is configured to determine the plurality of first electrical signals corresponding to the current speed of the water pump based on a preset table; and to determine the gas-liquid mixing state in the coolant storage tank as a low-liquid state if the comparison result indicates that the electrical signal belongs to a first signal range formed by the first electrical signal in the first signal group and the first electrical signal in the second signal group, and the duration of the electrical signal is greater than or equal to a preset duration; to determine the gas-liquid mixing state in the coolant storage tank as a leaking state if the comparison result indicates that the electrical signal belongs to a second signal range formed by the first electrical signal in the second signal group and the first electrical signal in the third signal group, and the duration of the electrical signal is greater than or equal to a preset duration; and to determine the gas-liquid mixing state in the coolant storage tank as a zero-liquid state if the comparison result indicates that the electrical signal is less than the first electrical signal in the third signal group, and the duration of the electrical signal is greater than or equal to a preset duration. An execution unit is configured to execute a target strategy based on the gas-liquid mixing state, the target strategy being characterized by either adjusting the current speed of the water pump or sending a liquid signal to the electronic control unit.

6. The control device according to claim 5, characterized in that, The execution unit includes: An adjustment unit is configured to adjust the current speed of the water pump to a first speed if the gas-liquid mixture is in a state of insufficient liquid, leakage, or no liquid; wherein the first speed represents the maximum speed of the water pump. The transmitting unit is configured to: control the water pump to send a low-liquidity signal to the electronic control unit if the electrical signal fed back by the water pump at the first rotational speed belongs to a third signal range formed by the second electrical signal in the first signal group and the second electrical signal in the second signal group, and the duration is greater than or equal to the preset duration; control the water pump to send a leakage signal to the electronic control unit if the electrical signal fed back by the water pump at the first rotational speed belongs to a fourth signal range formed by the second electrical signal in the second signal group and the second electrical signal in the third signal group, and the duration is greater than or equal to the preset duration; and control the water pump to send a no-liquidity signal to the electronic control unit if the electrical signal fed back by the water pump at the first rotational speed is less than the second electrical signal in the third signal group.

7. The control device according to claim 5, characterized in that, The device includes: The output unit is used to output an alarm signal corresponding to the liquid signal.

8. A vehicle, characterized in that, The vehicle includes the control device as described in any one of claims 5 to 7.

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